/********************************************************************** ** ** Implementation of QListBox widget class ** ** Created : 941121 ** ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the widgets module of the Qt GUI Toolkit. ** ** This file may be used under the terms of the GNU General ** Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the files LICENSE.GPL2 ** and LICENSE.GPL3 included in the packaging of this file. ** Alternatively you may (at your option) use any later version ** of the GNU General Public License if such license has been ** publicly approved by Trolltech ASA (or its successors, if any) ** and the KDE Free Qt Foundation. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** This file may be used under the terms of the Q Public License as ** defined by Trolltech ASA and appearing in the file LICENSE.QPL ** included in the packaging of this file. Licensees holding valid Qt ** Commercial licenses may use this file in accordance with the Qt ** Commercial License Agreement provided with the Software. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted ** herein. ** **********************************************************************/ #include "qglobal.h" #if defined(Q_CC_BOR) // needed for qsort() because of a std namespace problem on Borland #include "qplatformdefs.h" #endif #include "qlistbox.h" #ifndef QT_NO_LISTBOX #include "qmemarray.h" #include "qfontmetrics.h" #include "qpainter.h" #include "qstrlist.h" #include "qpixmap.h" #include "qapplication.h" #include "qptrdict.h" #include "qtimer.h" #include "qstringlist.h" #include "qstyle.h" #include "qpopupmenu.h" #include "qguardedptr.h" #if defined(QT_ACCESSIBILITY_SUPPORT) #include "qaccessible.h" #endif #include class QListBoxPrivate { public: QListBoxPrivate( QListBox *lb ): head( 0 ), last( 0 ), cache( 0 ), cacheIndex( -1 ), current( 0 ), highlighted( 0 ), tmpCurrent( 0 ), columnPos( 1 ), rowPos( 1 ), rowPosCache( 0 ), columnPosOne( 0 ), rowMode( QListBox::FixedNumber ), columnMode( QListBox::FixedNumber ), numRows( 1 ), numColumns( 1 ), currentRow( 0 ), currentColumn( 0 ), mousePressRow( -1 ), mousePressColumn( -1 ), mouseMoveRow( -1 ), mouseMoveColumn( -1 ), mouseInternalPress( FALSE ), scrollTimer( 0 ), updateTimer( 0 ), visibleTimer( 0 ), selectionMode( QListBox::Single ), count( 0 ), listBox( lb ), currInputString( QString::null ), rowModeWins( FALSE ), ignoreMoves( FALSE ), layoutDirty( TRUE ), mustPaintAll( TRUE ), dragging( FALSE ), dirtyDrag ( FALSE ), variableHeight( TRUE /* !!! ### FALSE */ ), variableWidth( FALSE ), inMenuMode( FALSE ) {} int findItemByName( int item, const QString &text ); ~QListBoxPrivate(); QListBoxItem * head, *last, *cache; int cacheIndex; QListBoxItem * current, *highlighted, *tmpCurrent; QMemArray columnPos; QMemArray rowPos; int rowPosCache; int columnPosOne; QListBox::LayoutMode rowMode; QListBox::LayoutMode columnMode; int numRows; int numColumns; int currentRow; int currentColumn; int mousePressRow; int mousePressColumn; int mouseMoveRow; int mouseMoveColumn; bool mouseInternalPress; QTimer * scrollTimer; QTimer * updateTimer; QTimer * visibleTimer; QTimer * resizeTimer; QPoint scrollPos; QListBox::SelectionMode selectionMode; int count; QListBox *listBox; QString currInputString; QTimer *inputTimer; QListBoxItem *pressedItem, *selectAnchor; uint select :1; uint pressedSelected :1; uint rowModeWins :1; uint ignoreMoves :1; uint clearing :1; uint layoutDirty :1; uint mustPaintAll :1; uint dragging :1; uint dirtyDrag :1; uint variableHeight :1; uint variableWidth :1; uint inMenuMode :1; QRect *rubber; QPtrDict selectable; struct SortableItem { QListBoxItem *item; }; }; QListBoxPrivate::~QListBoxPrivate() { Q_ASSERT( !head ); } /*! \class QListBoxItem qlistbox.h \brief The QListBoxItem class is the base class of all list box items. This class is an abstract base class used for all list box items. If you need to insert customized items into a QListBox you must inherit this class and reimplement paint(), height() and width(). \sa QListBox */ /*! \fn bool QListBox::dragSelect() const \internal */ /*! \fn void QListBox::setDragSelect( bool ) \internal */ /*! \fn bool QListBox::autoScroll() const \internal */ /*! \fn void QListBox::setAutoScroll( bool ) \internal */ /*! \fn bool QListBox::autoScrollBar() const \obsolete Returns TRUE if vScrollBarMode() is \c Auto; otherwise returns FALSE. */ /*! \fn void QListBox::setAutoScrollBar( bool enable ) \obsolete If \a enable is TRUE sets setVScrollBarMode() to \c AlwaysOn; otherwise sets setVScrollBarMode() to \c AlwaysOff. */ /*! \fn bool QListBox::scrollBar() const \obsolete Returns FALSE if vScrollBarMode() is \c AlwaysOff; otherwise returns TRUE. */ /*! \fn void QListBox::setScrollBar( bool enable ) \obsolete If \a enable is TRUE sets setVScrollBarMode() to \c AlwaysOn; otherwise sets setVScrollBarMode() to \c AlwaysOff. */ /*! \fn bool QListBox::autoBottomScrollBar() const \obsolete Returns TRUE if hScrollBarMode() is \c Auto; otherwise returns FALSE. */ /*! \fn void QListBox::setAutoBottomScrollBar( bool enable ) \obsolete If \a enable is TRUE sets setHScrollBarMode() to \c AlwaysOn; otherwise sets setHScrollBarMode() to \c AlwaysOff. */ /*! \fn bool QListBox::bottomScrollBar() const \obsolete Returns FALSE if vScrollBarMode() is \c AlwaysOff; otherwise returns TRUE. */ /*! \fn void QListBox::setBottomScrollBar( bool enable ) \obsolete If \a enable is TRUE sets setHScrollBarMode() to \c AlwaysOn; otherwise sets setHScrollBarMode() to \c AlwaysOff. */ /*! \fn bool QListBox::smoothScrolling() const \internal */ /*! \fn void QListBox::setSmoothScrolling( bool ) \internal */ /*! \fn bool QListBox::autoUpdate() const \internal */ /*! \fn void QListBox::setAutoUpdate( bool ) \internal */ /*! \fn void QListBox::setFixedVisibleLines( int lines ) \internal */ /*! \obsolete \fn int QListBox::cellHeight( int i ) const Returns the item height of item \a i. \sa itemHeight() */ /*! \obsolete \overload int QListBox::cellHeight() const Returns the item height of the first item, item 0. \sa itemHeight() */ /*! \obsolete \fn int QListBox::cellWidth() const Returns the maximum item width. \sa maxItemWidth() */ /*! \overload int QListBox::cellWidth(int i) const \internal */ /*! \obsolete \fn int QListBox::numCols() const Returns the number of columns. \sa numColumns() */ /*! \fn void QListBox::updateCellWidth() \internal */ /*! \obsolete \fn int QListBox::totalWidth() const Returns contentsWidth(). */ /*! \obsolete \fn int QListBox::totalHeight() const Returns contentsHeight(). */ /*! \obsolete \fn int QListBox::findItem( int yPos ) const Returns the index of the item a point (0, \a yPos). \sa index() itemAt() */ /*! Constructs an empty list box item in the list box \a listbox. */ QListBoxItem::QListBoxItem( QListBox* listbox ) { lbox = listbox; s = FALSE; dirty = TRUE; custom_highlight = FALSE; p = n = 0; // just something that'll look noticeable in the debugger x = y = 42; if (listbox) listbox->insertItem( this ); } /*! Constructs an empty list box item in the list box \a listbox and inserts it after the item \a after or at the beginning if \a after is 0. */ QListBoxItem::QListBoxItem( QListBox* listbox, QListBoxItem *after ) { lbox = listbox; s = FALSE; dirty = TRUE; custom_highlight = FALSE; p = n = 0; // just something that'll be noticeable in the debugger x = y = 42; if (listbox) listbox->insertItem( this, after ); } /*! Destroys the list box item. */ QListBoxItem::~QListBoxItem() { if ( lbox ) lbox->takeItem( this ); } /*! Defines whether the list box item is responsible for drawing itself in a highlighted state when being selected. If \a b is FALSE (the default), the list box will draw some default highlight indicator before calling paint(). \sa selected(), paint() */ void QListBoxItem::setCustomHighlighting( bool b ) { custom_highlight = b; } /*! \fn void QListBoxItem::paint( QPainter *p ) Implement this function to draw your item. The painter, \a p, is already open for painting. \sa height(), width() */ /*! \fn int QListBoxItem::width( const QListBox* lb ) const Reimplement this function to return the width of your item. The \a lb parameter is the same as listBox() and is provided for convenience and compatibility. The default implementation returns \l{QApplication::globalStrut()}'s width. \sa paint(), height() */ int QListBoxItem::width(const QListBox*) const { return QApplication::globalStrut().width(); } /*! \fn int QListBoxItem::height( const QListBox* lb ) const Implement this function to return the height of your item. The \a lb parameter is the same as listBox() and is provided for convenience and compatibility. The default implementation returns \l{QApplication::globalStrut()}'s height. \sa paint(), width() */ int QListBoxItem::height(const QListBox*) const { return QApplication::globalStrut().height(); } /*! Returns the text of the item. This text is also used for sorting. \sa setText() */ QString QListBoxItem::text() const { return txt; } /*! Returns the pixmap associated with the item, or 0 if there isn't one. The default implementation returns 0. */ const QPixmap *QListBoxItem::pixmap() const { return 0; } /*! If \a b is TRUE (the default) then this item can be selected by the user; otherwise this item cannot be selected by the user. \sa isSelectable() */ void QListBoxItem::setSelectable( bool b ) { if ( !listBox() ) return; bool *sel = listBox()->d->selectable.find( this ); if ( !sel ) listBox()->d->selectable.insert( this, new bool( b ) ); else listBox()->d->selectable.replace( this, new bool( b ) ); } /*! Returns TRUE if this item is selectable (the default); otherwise returns FALSE. \sa setSelectable() */ bool QListBoxItem::isSelectable() const { if ( !listBox() ) return TRUE; bool *sel = listBox()->d->selectable.find( ( (QListBoxItem*)this ) ); if ( !sel ) return TRUE; else return *sel; } /*! \fn void QListBoxItem::setText( const QString &text ) Sets the text of the QListBoxItem to \a text. This \a text is also used for sorting. The text is not shown unless explicitly drawn in paint(). \sa text() */ /*! \class QListBoxText qlistbox.h \brief The QListBoxText class provides list box items that display text. \ingroup advanced The text is drawn in the widget's current font. If you need several different fonts, you must implement your own subclass of QListBoxItem. \sa QListBox, QListBoxItem */ /*! Constructs a list box item in list box \a listbox showing the text \a text. */ QListBoxText::QListBoxText( QListBox *listbox, const QString &text ) :QListBoxItem( listbox ) { setText( text ); } /*! Constructs a list box item showing the text \a text. */ QListBoxText::QListBoxText( const QString &text ) :QListBoxItem() { setText( text ); } /*! Constructs a list box item in list box \a listbox showing the text \a text. The item is inserted after the item \a after, or at the beginning if \a after is 0. */ QListBoxText::QListBoxText( QListBox* listbox, const QString &text, QListBoxItem *after ) : QListBoxItem( listbox, after ) { setText( text ); } /*! Destroys the item. */ QListBoxText::~QListBoxText() { } /*! Draws the text using \a painter. */ void QListBoxText::paint( QPainter *painter ) { int itemHeight = height( listBox() ); QFontMetrics fm = painter->fontMetrics(); int yPos = ( ( itemHeight - fm.height() ) / 2 ) + fm.ascent(); painter->drawText( 3, yPos, text() ); } /*! Returns the height of a line of text in list box \a lb. \sa paint(), width() */ int QListBoxText::height( const QListBox* lb ) const { int h = lb ? lb->fontMetrics().lineSpacing() + 2 : 0; return QMAX( h, QApplication::globalStrut().height() ); } /*! Returns the width of this line in list box \a lb. \sa paint(), height() */ int QListBoxText::width( const QListBox* lb ) const { int w = lb ? lb->fontMetrics().width( text() ) + 6 : 0; return QMAX( w, QApplication::globalStrut().width() ); } int QListBoxText::RTTI = 1; /*! \fn int QListBoxText::rtti() const \reimp Returns 1. Make your derived classes return their own values for rtti(), and you can distinguish between listbox items. You should use values greater than 1000 preferably a large random number, to allow for extensions to this class. */ int QListBoxText::rtti() const { return RTTI; } /*! \class QListBoxPixmap qlistbox.h \brief The QListBoxPixmap class provides list box items with a pixmap and optional text. \ingroup advanced Items of this class are drawn with the pixmap on the left with the optional text to the right of the pixmap. \sa QListBox, QListBoxItem */ /*! Constructs a new list box item in list box \a listbox showing the pixmap \a pixmap. */ QListBoxPixmap::QListBoxPixmap( QListBox* listbox, const QPixmap &pixmap ) : QListBoxItem( listbox ) { pm = pixmap; } /*! Constructs a new list box item showing the pixmap \a pixmap. */ QListBoxPixmap::QListBoxPixmap( const QPixmap &pixmap ) : QListBoxItem() { pm = pixmap; } /*! Constructs a new list box item in list box \a listbox showing the pixmap \a pixmap. The item gets inserted after the item \a after, or at the beginning if \a after is 0. */ QListBoxPixmap::QListBoxPixmap( QListBox* listbox, const QPixmap &pixmap, QListBoxItem *after ) : QListBoxItem( listbox, after ) { pm = pixmap; } /*! Destroys the item. */ QListBoxPixmap::~QListBoxPixmap() { } /*! Constructs a new list box item in list box \a listbox showing the pixmap \a pix and the text \a text. */ QListBoxPixmap::QListBoxPixmap( QListBox* listbox, const QPixmap &pix, const QString& text) : QListBoxItem( listbox ) { pm = pix; setText( text ); } /*! Constructs a new list box item showing the pixmap \a pix and the text to \a text. */ QListBoxPixmap::QListBoxPixmap( const QPixmap & pix, const QString& text) : QListBoxItem() { pm = pix; setText( text ); } /*! Constructs a new list box item in list box \a listbox showing the pixmap \a pix and the string \a text. The item gets inserted after the item \a after, or at the beginning if \a after is 0. */ QListBoxPixmap::QListBoxPixmap( QListBox* listbox, const QPixmap & pix, const QString& text, QListBoxItem *after ) : QListBoxItem( listbox, after ) { pm = pix; setText( text ); } /*! \fn const QPixmap *QListBoxPixmap::pixmap() const Returns the pixmap associated with the item. */ /*! Draws the pixmap using \a painter. */ void QListBoxPixmap::paint( QPainter *painter ) { int itemHeight = height( listBox() ); int yPos; const QPixmap *pm = pixmap(); if ( pm && ! pm->isNull() ) { yPos = ( itemHeight - pm->height() ) / 2; painter->drawPixmap( 3, yPos, *pm); } if ( !text().isEmpty() ) { QFontMetrics fm = painter->fontMetrics(); yPos = ( ( itemHeight - fm.height() ) / 2 ) + fm.ascent(); painter->drawText( pm->width() + 5, yPos, text() ); } } /*! Returns the height of the pixmap in list box \a lb. \sa paint(), width() */ int QListBoxPixmap::height( const QListBox* lb ) const { int h; if ( text().isEmpty() ) h = pm.height(); else h = QMAX( pm.height(), lb->fontMetrics().lineSpacing() + 2 ); return QMAX( h, QApplication::globalStrut().height() ); } /*! Returns the width of the pixmap plus some margin in list box \a lb. \sa paint(), height() */ int QListBoxPixmap::width( const QListBox* lb ) const { if ( text().isEmpty() ) return QMAX( pm.width() + 6, QApplication::globalStrut().width() ); return QMAX( pm.width() + lb->fontMetrics().width( text() ) + 6, QApplication::globalStrut().width() ); } int QListBoxPixmap::RTTI = 2; /*! \fn int QListBoxPixmap::rtti() const \reimp Returns 2. Make your derived classes return their own values for rtti(), and you can distinguish between listbox items. You should use values greater than 1000 preferably a large random number, to allow for extensions to this class. */ int QListBoxPixmap::rtti() const { return RTTI; } /*! \class QListBox qlistbox.h \brief The QListBox widget provides a list of selectable, read-only items. \ingroup advanced \mainclass This is typically a single-column list in which either no item or one item is selected, but it can also be used in many other ways. QListBox will add scroll bars as necessary, but it isn't intended for \e really big lists. If you want more than a few thousand items, it's probably better to use a different widget mainly because the scroll bars won't provide very good navigation, but also because QListBox may become slow with huge lists. (See QListView and QTable for possible alternatives.) There are a variety of selection modes described in the QListBox::SelectionMode documentation. The default is \c Single selection mode, but you can change it using setSelectionMode(). (setMultiSelection() is still provided for compatibility with Qt 1.x. We recommend using setSelectionMode() in all code.) Because QListBox offers multiple selection it must display keyboard focus and selection state separately. Therefore there are functions both to set the selection state of an item, i.e. setSelected(), and to set which item displays keyboard focus, i.e. setCurrentItem(). The list box normally arranges its items in a single column and adds a vertical scroll bar if required. It is possible to have a different fixed number of columns (setColumnMode()), or as many columns as will fit in the list box's assigned screen space (setColumnMode(FitToWidth)), or to have a fixed number of rows (setRowMode()) or as many rows as will fit in the list box's assigned screen space (setRowMode(FitToHeight)). In all these cases QListBox will add scroll bars, as appropriate, in at least one direction. If multiple rows are used, each row can be as high as necessary (the normal setting), or you can request that all items will have the same height by calling setVariableHeight(FALSE). The same applies to a column's width, see setVariableWidth(). The QListBox's items are QListBoxItem objects. QListBox provides methods to insert new items as strings, as pixmaps, and as QListBoxItem * (insertItem() with various arguments), and to replace an existing item with a new string, pixmap or QListBoxItem (changeItem() with various arguments). You can also remove items singly with removeItem() or clear() the entire list box. Note that if you create a QListBoxItem yourself and insert it, QListBox takes ownership of the item. You can also create a QListBoxItem, such as QListBoxText or QListBoxPixmap, with the list box as first parameter. The item will then append itself. When you delete an item it is automatically removed from the list box. The list of items can be arbitrarily large; QListBox will add scroll bars if necessary. QListBox can display a single-column (the common case) or multiple-columns, and offers both single and multiple selection. QListBox does not support multiple-column items (but QListView and QTable do), or tree hierarchies (but QListView does). The list box items can be accessed both as QListBoxItem objects (recommended) and using integer indexes (the original QListBox implementation used an array of strings internally, and the API still supports this mode of operation). Everything can be done using the new objects, and most things can be done using indexes. Each item in a QListBox contains a QListBoxItem. One of the items can be the current item. The currentChanged() signal and the highlighted() signal are emitted when a new item becomes current, e.g. because the user clicks on it or QListBox::setCurrentItem() is called. The selected() signal is emitted when the user double-clicks on an item or presses Enter on the current item. If the user does not select anything, no signals are emitted and currentItem() returns -1. A list box has \c WheelFocus as a default focusPolicy(), i.e. it can get keyboard focus by tabbing, clicking and through the use of the mouse wheel. New items can be inserted using insertItem(), insertStrList() or insertStringList(). inSort() is obsolete because this method is quite inefficient. It's preferable to insert the items normally and call sort() afterwards, or to insert a sorted QStringList(). By default, vertical and horizontal scroll bars are added and removed as necessary. setHScrollBarMode() and setVScrollBarMode() can be used to change this policy. If you need to insert types other than strings and pixmaps, you must define new classes which inherit QListBoxItem. \warning The list box assumes ownership of all list box items and will delete them when it does not need them any more. \sa QListView QComboBox QButtonGroup \link guibooks.html#fowler GUI Design Handbook: List Box (two sections)\endlink */ /*! \enum QListBox::SelectionMode This enumerated type is used by QListBox to indicate how it reacts to selection by the user. \value Single When the user selects an item, any already-selected item becomes unselected and the user cannot unselect the selected item. This means that the user can never clear the selection, even though the selection may be cleared by the application programmer using QListBox::clearSelection(). \value Multi When the user selects an item the selection status of that item is toggled and the other items are left alone. Also, multiple items can be selected by dragging the mouse while the left mouse button is kept pressed. \value Extended When the user selects an item the selection is cleared and the new item selected. However, if the user presses the Ctrl key when clicking on an item, the clicked item gets toggled and all other items are left untouched. And if the user presses the Shift key while clicking on an item, all items between the current item and the clicked item get selected or unselected, depending on the state of the clicked item. Also, multiple items can be selected by dragging the mouse while the left mouse button is kept pressed. \value NoSelection Items cannot be selected. In other words, \c Single is a real single-selection list box, \c Multi is a real multi-selection list box, \c Extended is a list box in which users can select multiple items but usually want to select either just one or a range of contiguous items, and \c NoSelection is for a list box where the user can look but not touch. */ /*! \enum QListBox::LayoutMode This enum type is used to specify how QListBox lays out its rows and columns. \value FixedNumber There is a fixed number of rows (or columns). \value FitToWidth There are as many columns as will fit on-screen. \value FitToHeight There are as many rows as will fit on-screen. \value Variable There are as many rows as are required by the column mode. (Or as many columns as required by the row mode.) Example: When you call setRowMode( FitToHeight ), columnMode() automatically becomes \c Variable to accommodate the row mode you've set. */ /*! \fn void QListBox::onItem( QListBoxItem *i ) This signal is emitted when the user moves the mouse cursor onto an item, similar to the QWidget::enterEvent() function. \a i is the QListBoxItem that the mouse has moved on. */ // ### bug here too? enter/leave event may noit considered. move the // mouse out of the window and back in, to the same item - does it // work? /*! \fn void QListBox::onViewport() This signal is emitted when the user moves the mouse cursor from an item to an empty part of the list box. */ /*! Constructs a new empty list box called \a name and with parent \a parent. Performance is boosted by modifying the widget flags \a f so that only part of the QListBoxItem children is redrawn. This may be unsuitable for custom QListBoxItem classes, in which case \c WStaticContents and \c WNoAutoErase should be cleared immediately after construction. \sa QWidget::clearWFlags() Qt::WidgetFlags */ QListBox::QListBox( QWidget *parent, const char *name, WFlags f ) : QScrollView( parent, name, f | WStaticContents | WNoAutoErase ) { d = new QListBoxPrivate( this ); d->updateTimer = new QTimer( this, "listbox update timer" ); d->visibleTimer = new QTimer( this, "listbox visible timer" ); d->inputTimer = new QTimer( this, "listbox input timer" ); d->resizeTimer = new QTimer( this, "listbox resize timer" ); d->clearing = FALSE; d->pressedItem = 0; d->selectAnchor = 0; d->select = FALSE; d->rubber = 0; d->selectable.setAutoDelete( TRUE ); setMouseTracking( TRUE ); viewport()->setMouseTracking( TRUE ); connect( d->updateTimer, SIGNAL(timeout()), this, SLOT(refreshSlot()) ); connect( d->visibleTimer, SIGNAL(timeout()), this, SLOT(ensureCurrentVisible()) ); connect( d->resizeTimer, SIGNAL( timeout() ), this, SLOT( adjustItems() ) ); viewport()->setBackgroundMode( PaletteBase ); setBackgroundMode( PaletteBackground, PaletteBase ); viewport()->setFocusProxy( this ); viewport()->setFocusPolicy( WheelFocus ); } QListBox * QListBox::changedListBox = 0; /*! Destroys the list box. Deletes all list box items. */ QListBox::~QListBox() { if ( changedListBox == this ) changedListBox = 0; clear(); delete d; d = 0; } /*! \fn void QListBox::pressed( QListBoxItem *item ) This signal is emitted when the user presses any mouse button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. Note that you must not delete any QListBoxItem objects in slots connected to this signal. */ /*! \overload void QListBox::pressed( QListBoxItem *item, const QPoint &pnt ) This signal is emitted when the user presses any mouse button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. \a pnt is the position of the mouse cursor in the global coordinate system (QMouseEvent::globalPos()). Note that you must not delete any QListBoxItem objects in slots connected to this signal. \sa mouseButtonPressed() rightButtonPressed() clicked() */ /*! \fn void QListBox::clicked( QListBoxItem *item ) This signal is emitted when the user clicks any mouse button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. Note that you must not delete any QListBoxItem objects in slots connected to this signal. */ /*! \overload void QListBox::clicked( QListBoxItem *item, const QPoint &pnt ) This signal is emitted when the user clicks any mouse button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. \a pnt is the position of the mouse cursor in the global coordinate system (QMouseEvent::globalPos()). (If the click's press and release differs by a pixel or two, \a pnt is the position at release time.) Note that you must not delete any QListBoxItem objects in slots connected to this signal. */ /*! \fn void QListBox::mouseButtonClicked (int button, QListBoxItem * item, const QPoint & pos) This signal is emitted when the user clicks mouse button \a button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. \a pos is the position of the mouse cursor in the global coordinate system (QMouseEvent::globalPos()). (If the click's press and release differs by a pixel or two, \a pos is the position at release time.) Note that you must not delete any QListBoxItem objects in slots connected to this signal. */ /*! \fn void QListBox::mouseButtonPressed (int button, QListBoxItem * item, const QPoint & pos) This signal is emitted when the user presses mouse button \a button. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. \a pos is the position of the mouse cursor in the global coordinate system (QMouseEvent::globalPos()). Note that you must not delete any QListBoxItem objects in slots connected to this signal. */ /*! \fn void QListBox::doubleClicked( QListBoxItem *item ) This signal is emitted whenever an item is double-clicked. It's emitted on the second button press, not the second button release. If \a item is not 0, the cursor is on \a item. If \a item is 0, the mouse cursor isn't on any item. */ /*! \fn void QListBox::returnPressed( QListBoxItem * ) This signal is emitted when Enter or Return is pressed. The argument is currentItem(). */ /*! \fn void QListBox::rightButtonClicked( QListBoxItem *, const QPoint& ) This signal is emitted when the right button is clicked (i.e. when it's released at the same point where it was pressed). The arguments are the relevant QListBoxItem (may be 0) and the point in global coordinates. */ /*! \fn void QListBox::rightButtonPressed (QListBoxItem *, const QPoint & ) This signal is emitted when the right button is pressed. The arguments are the relevant QListBoxItem (may be 0) and the point in global coordinates. */ /*! \fn void QListBox::contextMenuRequested( QListBoxItem *item, const QPoint & pos ) This signal is emitted when the user invokes a context menu with the right mouse button or with special system keys, with \a item being the item under the mouse cursor or the current item, respectively. \a pos is the position for the context menu in the global coordinate system. */ /*! \fn void QListBox::selectionChanged() This signal is emitted when the selection set of a list box changes. This signal is emitted in each selection mode. If the user selects five items by drag-selecting, QListBox tries to emit just one selectionChanged() signal so the signal can be connected to computationally expensive slots. \sa selected() currentItem() */ /*! \overload void QListBox::selectionChanged( QListBoxItem *item ) This signal is emitted when the selection in a \c Single selection list box changes. \a item is the newly selected list box item. \sa selected() currentItem() */ /*! \fn void QListBox::currentChanged( QListBoxItem *item ) This signal is emitted when the user makes a new item the current item. \a item is the new current list box item. \sa setCurrentItem() currentItem() */ /*! \fn void QListBox::highlighted( int index ) This signal is emitted when the user makes a new item the current item. \a index is the index of the new current item. \sa currentChanged() selected() currentItem() selectionChanged() */ /*! \overload void QListBox::highlighted( QListBoxItem * ) This signal is emitted when the user makes a new item the current item. The argument is a pointer to the new current item. \sa currentChanged() selected() currentItem() selectionChanged() */ /*! \overload void QListBox::highlighted( const QString & ) This signal is emitted when the user makes a new item the current item and the item is (or has) a string. The argument is the text of the new current item. \sa currentChanged() selected() currentItem() selectionChanged() */ /*! \fn void QListBox::selected( int index ) This signal is emitted when the user double-clicks on an item or presses Enter on the current item. \a index is the index of the selected item. \sa currentChanged() highlighted() selectionChanged() */ /*! \overload void QListBox::selected( QListBoxItem * ) This signal is emitted when the user double-clicks on an item or presses Enter on the current item. The argument is a pointer to the new selected item. \sa currentChanged() highlighted() selectionChanged() */ /*! \overload void QListBox::selected( const QString &) This signal is emitted when the user double-clicks on an item or presses Enter on the current item, and the item is (or has) a string. The argument is the text of the selected item. \sa currentChanged() highlighted() selectionChanged() */ /*! \reimp */ void QListBox::setFont( const QFont &font ) { QScrollView::setFont( font ); triggerUpdate( TRUE ); } /*! \property QListBox::count \brief the number of items in the list box */ uint QListBox::count() const { return d->count; } /*! Inserts the string list \a list into the list at position \a index. If \a index is negative, \a list is inserted at the end of the list. If \a index is too large, the operation is ignored. \warning This function uses \c{const char *} rather than QString, so we recommend against using it. It is provided so that legacy code will continue to work, and so that programs that certainly will not need to handle code outside a single 8-bit locale can use it. See insertStringList() which uses real QStrings. \warning This function is never significantly faster than a loop around insertItem(). \sa insertItem(), insertStringList() */ void QListBox::insertStrList( const QStrList *list, int index ) { if ( !list ) { #if defined(QT_CHECK_NULL) Q_ASSERT( list != 0 ); #endif return; } insertStrList( *list, index ); } /*! Inserts the string list \a list into the list at position \a index. If \a index is negative, \a list is inserted at the end of the list. If \a index is too large, the operation is ignored. \warning This function is never significantly faster than a loop around insertItem(). \sa insertItem(), insertStrList() */ void QListBox::insertStringList( const QStringList & list, int index ) { if ( index < 0 ) index = count(); for ( QStringList::ConstIterator it = list.begin(); it != list.end(); ++it ) insertItem( new QListBoxText(*it), index++ ); } /*! \overload Inserts the string list \a list into the list at position \a index. If \a index is negative, \a list is inserted at the end of the list. If \a index is too large, the operation is ignored. \warning This function uses \c{const char *} rather than QString, so we recommend against using it. It is provided so that legacy code will continue to work, and so that programs that certainly will not need to handle code outside a single 8-bit locale can use it. See insertStringList() which uses real QStrings. \warning This function is never significantly faster than a loop around insertItem(). \sa insertItem(), insertStringList() */ void QListBox::insertStrList( const QStrList & list, int index ) { QStrListIterator it( list ); const char* txt; if ( index < 0 ) index = count(); while ( (txt=it.current()) ) { ++it; insertItem( new QListBoxText(QString::fromLatin1(txt)), index++ ); } if ( hasFocus() && !d->current ) setCurrentItem( d->head ); } /*! \overload Inserts the \a numStrings strings of the array \a strings into the list at position \a index. If \a index is negative, insertStrList() inserts \a strings at the end of the list. If \a index is too large, the operation is ignored. \warning This function uses \c{const char *} rather than QString, so we recommend against using it. It is provided so that legacy code will continue to work, and so that programs that certainly will not need to handle code outside a single 8-bit locale can use it. See insertStringList() which uses real QStrings. \warning This function is never significantly faster than a loop around insertItem(). \sa insertItem(), insertStringList() */ void QListBox::insertStrList( const char **strings, int numStrings, int index ) { if ( !strings ) { #if defined(QT_CHECK_NULL) Q_ASSERT( strings != 0 ); #endif return; } if ( index < 0 ) index = count(); int i = 0; while ( (numStrings<0 && strings[i]!=0) || icurrent ) setCurrentItem( d->head ); } /*! Inserts the item \a lbi into the list at position \a index. If \a index is negative or larger than the number of items in the list box, \a lbi is inserted at the end of the list. \sa insertStrList() */ void QListBox::insertItem( const QListBoxItem *lbi, int index ) { #if defined ( QT_CHECK_NULL ) Q_ASSERT( lbi != 0 ); #else if ( !lbi ) return; #endif if ( index < 0 ) index = d->count; if ( index >= d->count ) { insertItem( lbi, d->last ); return; } QListBoxItem * item = (QListBoxItem *)lbi; d->count++; d->cache = 0; item->lbox = this; if ( !d->head || index == 0 ) { item->n = d->head; item->p = 0; d->head = item; item->dirty = TRUE; if ( item->n ) item->n->p = item; } else { QListBoxItem * i = d->head; while ( i->n && index > 1 ) { i = i->n; index--; } if ( i->n ) { item->n = i->n; item->p = i; item->n->p = item; item->p->n = item; } else { i->n = item; item->p = i; item->n = 0; } } if ( hasFocus() && !d->current ) { d->current = d->head; updateItem( d->current ); emit highlighted( d->current ); emit highlighted( d->current->text() ); emit highlighted( index ); } triggerUpdate( TRUE ); } /*! \overload Inserts the item \a lbi into the list after the item \a after, or at the beginning if \a after is 0. \sa insertStrList() */ void QListBox::insertItem( const QListBoxItem *lbi, const QListBoxItem *after ) { #if defined ( QT_CHECK_NULL ) Q_ASSERT( lbi != 0 ); #else if ( !lbi ) return; #endif QListBoxItem * item = (QListBoxItem*)lbi; d->count++; d->cache = 0; item->lbox = this; if ( !d->head || !after ) { item->n = d->head; item->p = 0; d->head = item; item->dirty = TRUE; if ( item->n ) item->n->p = item; } else { QListBoxItem * i = (QListBoxItem*) after; if ( i ) { item->n = i->n; item->p = i; if ( item->n ) item->n->p = item; if ( item->p ) item->p->n = item; } } if ( after == d->last ) d->last = (QListBoxItem*) lbi; if ( hasFocus() && !d->current ) { d->current = d->head; updateItem( d->current ); emit highlighted( d->current ); emit highlighted( d->current->text() ); emit highlighted( index( d->current ) ); } triggerUpdate( TRUE ); } /*! \overload Inserts a new list box text item with the text \a text into the list at position \a index. If \a index is negative, \a text is inserted at the end of the list. \sa insertStrList() */ void QListBox::insertItem( const QString &text, int index ) { insertItem( new QListBoxText(text), index ); } /*! \overload Inserts a new list box pixmap item with the pixmap \a pixmap into the list at position \a index. If \a index is negative, \a pixmap is inserted at the end of the list. \sa insertStrList() */ void QListBox::insertItem( const QPixmap &pixmap, int index ) { insertItem( new QListBoxPixmap(pixmap), index ); } /*! \overload Inserts a new list box pixmap item with the pixmap \a pixmap and the text \a text into the list at position \a index. If \a index is negative, \a pixmap is inserted at the end of the list. \sa insertStrList() */ void QListBox::insertItem( const QPixmap &pixmap, const QString &text, int index ) { insertItem( new QListBoxPixmap(pixmap, text), index ); } /*! Removes and deletes the item at position \a index. If \a index is equal to currentItem(), a new item becomes current and the currentChanged() and highlighted() signals are emitted. \sa insertItem(), clear() */ void QListBox::removeItem( int index ) { bool wasVisible = itemVisible( currentItem() ); delete item( index ); triggerUpdate( TRUE ); if ( wasVisible ) ensureCurrentVisible(); } /*! Deletes all the items in the list. \sa removeItem() */ void QListBox::clear() { setContentsPos( 0, 0 ); bool blocked = signalsBlocked(); blockSignals( TRUE ); d->clearing = TRUE; d->current = 0; d->tmpCurrent = 0; QListBoxItem * i = d->head; d->head = 0; while ( i ) { QListBoxItem * n = i->n; i->n = i->p = 0; delete i; i = n; } d->count = 0; d->numRows = 1; d->numColumns = 1; d->currentRow = 0; d->currentColumn = 0; d->mousePressRow = -1; d->mousePressColumn = -1; d->mouseMoveRow = -1; d->mouseMoveColumn = -1; d->selectable.clear(); clearSelection(); blockSignals( blocked ); triggerUpdate( TRUE ); d->last = 0; d->clearing = FALSE; } /*! Returns the text at position \a index, or QString::null if there is no text at that position. \sa pixmap() */ QString QListBox::text( int index ) const { QListBoxItem * i = item( index ); if ( i ) return i->text(); return QString::null; } /*! Returns a pointer to the pixmap at position \a index, or 0 if there is no pixmap there. \sa text() */ const QPixmap *QListBox::pixmap( int index ) const { QListBoxItem * i = item( index ); if ( i ) return i->pixmap(); return 0; } /*! \overload Replaces the item at position \a index with a new list box text item with text \a text. The operation is ignored if \a index is out of range. \sa insertItem(), removeItem() */ void QListBox::changeItem( const QString &text, int index ) { if( index >= 0 && index < (int)count() ) changeItem( new QListBoxText(text), index ); } /*! \overload Replaces the item at position \a index with a new list box pixmap item with pixmap \a pixmap. The operation is ignored if \a index is out of range. \sa insertItem(), removeItem() */ void QListBox::changeItem( const QPixmap &pixmap, int index ) { if( index >= 0 && index < (int)count() ) changeItem( new QListBoxPixmap(pixmap), index ); } /*! \overload Replaces the item at position \a index with a new list box pixmap item with pixmap \a pixmap and text \a text. The operation is ignored if \a index is out of range. \sa insertItem(), removeItem() */ void QListBox::changeItem( const QPixmap &pixmap, const QString &text, int index ) { if( index >= 0 && index < (int)count() ) changeItem( new QListBoxPixmap(pixmap, text), index ); } /*! Replaces the item at position \a index with \a lbi. If \a index is negative or too large, changeItem() does nothing. The item that has been changed will become selected. \sa insertItem(), removeItem() */ void QListBox::changeItem( const QListBoxItem *lbi, int index ) { if ( !lbi || index < 0 || index >= (int)count() ) return; removeItem( index ); insertItem( lbi, index ); setCurrentItem( index ); } /*! \property QListBox::numItemsVisible \brief the number of visible items. Both partially and entirely visible items are counted. */ int QListBox::numItemsVisible() const { doLayout(); int columns = 0; int x = contentsX(); int i=0; while ( i < (int)d->columnPos.size()-1 && d->columnPos[i] < x ) i++; if ( i < (int)d->columnPos.size()-1 && d->columnPos[i] > x ) columns++; x += visibleWidth(); while ( i < (int)d->columnPos.size()-1 && d->columnPos[i] < x ) { i++; columns++; } int y = contentsY(); int rows = 0; while ( i < (int)d->rowPos.size()-1 && d->rowPos[i] < y ) i++; if ( i < (int)d->rowPos.size()-1 && d->rowPos[i] > y ) rows++; y += visibleHeight(); while ( i < (int)d->rowPos.size()-1 && d->rowPos[i] < y ) { i++; rows++; } return rows*columns; } int QListBox::currentItem() const { if ( !d->current || !d->head ) return -1; return index( d->current ); } /*! \property QListBox::currentText \brief the text of the current item. This is equivalent to text(currentItem()). */ /*! \property QListBox::currentItem \brief the current highlighted item When setting this property, the highlighting is moved to the item and the list box scrolled as necessary. If no item is current, currentItem() returns -1. */ void QListBox::setCurrentItem( int index ) { setCurrentItem( item( index ) ); } /*! \overload Sets the current item to the QListBoxItem \a i. */ void QListBox::setCurrentItem( QListBoxItem * i ) { if ( !i || d->current == i || numRows() == 0 ) return; QRect mfrect = itemRect( i ); if ( mfrect.isValid() ) setMicroFocusHint( mfrect.x(), mfrect.y(), mfrect.width(), mfrect.height(), FALSE ); QListBoxItem * o = d->current; d->current = i; int ind = index( i ); if ( i && selectionMode() == Single ) { bool changed = FALSE; if ( o && o->s ) { changed = TRUE; o->s = FALSE; } if ( i && !i->s && d->selectionMode != NoSelection && i->isSelectable() ) { i->s = TRUE; changed = TRUE; emit selectionChanged( i ); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::StateChanged ); #endif } if ( changed ) { emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); #endif } } d->currentColumn = ind / numRows(); d->currentRow = ind % numRows(); if ( o ) updateItem( o ); if ( i ) updateItem( i ); // scroll after the items are redrawn d->visibleTimer->start( 1, TRUE ); QString tmp; if ( i ) tmp = i->text(); emit highlighted( i ); if ( !tmp.isNull() ) emit highlighted( tmp ); emit highlighted( ind ); emit currentChanged( i ); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::Focus ); #endif } /*! Returns a pointer to the item at position \a index, or 0 if \a index is out of bounds. \sa index() */ QListBoxItem *QListBox::item( int index ) const { if ( index < 0 || index > d->count -1 ) return 0; QListBoxItem * i = d->head; if ( d->cache && index > 0 ) { i = d->cache; int idx = d->cacheIndex; while ( i && idx < index ) { idx++; i = i->n; } while ( i && idx > index ) { idx--; i = i->p; } } else { int idx = index; while ( i && idx > 0 ) { idx--; i = i->n; } } if ( index > 0 ) { d->cache = i; d->cacheIndex = index; } return i; } /*! Returns the index of \a lbi, or -1 if the item is not in this list box or \a lbi is 0. \sa item() */ int QListBox::index( const QListBoxItem * lbi ) const { if ( !lbi ) return -1; QListBoxItem * i_n = d->head; int c_n = 0; if ( d->cache ) { i_n = d->cache; c_n = d->cacheIndex; } QListBoxItem* i_p = i_n; int c_p = c_n; while ( ( i_n != 0 || i_p != 0 ) && i_n != lbi && i_p != lbi ) { if ( i_n ) { c_n++; i_n = i_n->n; } if ( i_p ) { c_p--; i_p = i_p->p; } } if ( i_p == lbi ) return c_p; if ( i_n == lbi ) return c_n; return -1; } /*! Returns TRUE if the item at position \a index is at least partly visible; otherwise returns FALSE. */ bool QListBox::itemVisible( int index ) { QListBoxItem * i = item( index ); return i ? itemVisible( i ) : FALSE; } /*! \overload Returns TRUE if \a item is at least partly visible; otherwise returns FALSE. */ bool QListBox::itemVisible( const QListBoxItem * item ) { if ( d->layoutDirty ) doLayout(); int i = index( item ); int col = i / numRows(); int row = i % numRows(); return ( d->columnPos[col] < contentsX()+visibleWidth() && d->rowPos[row] < contentsY()+visibleHeight() && d->columnPos[col+1] > contentsX() && d->rowPos[row+1] > contentsY() ); } /*! \reimp */ void QListBox::mousePressEvent( QMouseEvent *e ) { mousePressEventEx( e ); } void QListBox::mousePressEventEx( QMouseEvent *e ) { d->mouseInternalPress = TRUE; QListBoxItem * i = itemAt( e->pos() ); if ( !i && !d->current && d->head ) { d->current = d->head; updateItem( d->head ); } if ( !i && ( d->selectionMode != Single || e->button() == RightButton ) && !( e->state() & ControlButton ) ) clearSelection(); d->select = d->selectionMode == Multi ? ( i ? !i->isSelected() : FALSE ) : TRUE; d->pressedSelected = i && i->s; if ( i ) d->selectAnchor = i; if ( i ) { switch( selectionMode() ) { default: case Single: if ( !i->s || i != d->current ) { if ( i->isSelectable() ) setSelected( i, TRUE ); else setCurrentItem( i ); } break; case Extended: if ( i ) { if ( !(e->state() & QMouseEvent::ShiftButton) && !(e->state() & QMouseEvent::ControlButton) ) { if ( !i->isSelected() ) { bool b = signalsBlocked(); blockSignals( TRUE ); clearSelection(); blockSignals( b ); } setSelected( i, TRUE ); d->dragging = TRUE; // always assume dragging } else if ( e->state() & ShiftButton ) { d->pressedSelected = FALSE; QListBoxItem *oldCurrent = item( currentItem() ); bool down = index( oldCurrent ) < index( i ); QListBoxItem *lit = down ? oldCurrent : i; bool select = d->select; bool blocked = signalsBlocked(); blockSignals( TRUE ); for ( ;; lit = lit->n ) { if ( !lit ) { triggerUpdate( FALSE ); break; } if ( down && lit == i ) { setSelected( i, select ); triggerUpdate( FALSE ); break; } if ( !down && lit == oldCurrent ) { setSelected( oldCurrent, select ); triggerUpdate( FALSE ); break; } setSelected( lit, select ); } blockSignals( blocked ); emit selectionChanged(); } else if ( e->state() & ControlButton ) { setSelected( i, !i->isSelected() ); d->pressedSelected = FALSE; } setCurrentItem( i ); } break; case Multi: //d->current = i; setSelected( i, !i->s ); setCurrentItem( i ); break; case NoSelection: setCurrentItem( i ); break; } } else { bool unselect = TRUE; if ( e->button() == LeftButton ) { if ( d->selectionMode == Multi || d->selectionMode == Extended ) { d->tmpCurrent = d->current; d->current = 0; updateItem( d->tmpCurrent ); if ( d->rubber ) delete d->rubber; d->rubber = 0; d->rubber = new QRect( e->x(), e->y(), 0, 0 ); if ( d->selectionMode == Extended && !( e->state() & ControlButton ) ) selectAll( FALSE ); unselect = FALSE; } if ( unselect && ( e->button() == RightButton || ( selectionMode() == Multi || selectionMode() == Extended ) ) ) clearSelection(); } } // for sanity, in case people are event-filtering or whatnot delete d->scrollTimer; d->scrollTimer = 0; if ( i ) { d->mousePressColumn = d->currentColumn; d->mousePressRow = d->currentRow; } else { d->mousePressColumn = -1; d->mousePressRow = -1; } d->ignoreMoves = FALSE; d->pressedItem = i; emit pressed( i ); emit pressed( i, e->globalPos() ); emit mouseButtonPressed( e->button(), i, e->globalPos() ); if ( e->button() == RightButton ) emit rightButtonPressed( i, e->globalPos() ); } /*! \reimp */ void QListBox::mouseReleaseEvent( QMouseEvent *e ) { if ( d->selectionMode == Extended && d->dragging ) { d->dragging = FALSE; if (d->current != d->pressedItem) { updateSelection(); // when we drag, we get an update after we release } } if ( d->rubber ) { drawRubber(); delete d->rubber; d->rubber = 0; d->current = d->tmpCurrent; updateItem( d->current ); } if ( d->scrollTimer ) mouseMoveEvent( e ); delete d->scrollTimer; d->scrollTimer = 0; d->ignoreMoves = FALSE; if ( d->selectionMode == Extended && d->current == d->pressedItem && d->pressedSelected && d->current ) { bool block = signalsBlocked(); blockSignals( TRUE ); clearSelection(); blockSignals( block ); d->current->s = TRUE; emit selectionChanged(); } QListBoxItem * i = itemAt( e->pos() ); bool emitClicked = d->mousePressColumn != -1 && d->mousePressRow != -1 || !d->pressedItem; emitClicked = emitClicked && d->pressedItem == i; d->pressedItem = 0; d->mousePressRow = -1; d->mousePressColumn = -1; d->mouseInternalPress = FALSE; if ( emitClicked ) { emit clicked( i ); emit clicked( i, e->globalPos() ); emit mouseButtonClicked( e->button(), i, e->globalPos() ); if ( e->button() == RightButton ) emit rightButtonClicked( i, e->globalPos() ); } } /*! \reimp */ void QListBox::mouseDoubleClickEvent( QMouseEvent *e ) { bool ok = TRUE; QListBoxItem *i = itemAt( e->pos() ); if ( !i || selectionMode() == NoSelection ) ok = FALSE; d->ignoreMoves = TRUE; if ( d->current && ok ) { QListBoxItem * i = d->current; QString tmp = d->current->text(); emit selected( currentItem() ); emit selected( i ); if ( !tmp.isNull() ) emit selected( tmp ); emit doubleClicked( i ); } } /*! \reimp */ void QListBox::mouseMoveEvent( QMouseEvent *e ) { QListBoxItem * i = itemAt( e->pos() ); if ( i != d->highlighted ) { if ( i ) { emit onItem( i ); } else { emit onViewport(); } d->highlighted = i; } if ( d->rubber ) { QRect r = d->rubber->normalize(); drawRubber(); d->rubber->setCoords( d->rubber->x(), d->rubber->y(), e->x(), e->y() ); doRubberSelection( r, d->rubber->normalize() ); drawRubber(); return; } if ( ( (e->state() & ( RightButton | LeftButton | MidButton ) ) == 0 ) || d->ignoreMoves ) return; // hack to keep the combo (and what else?) working: if we get a // move outside the listbox without having seen a press, discard // it. if ( !QRect( 0, 0, visibleWidth(), visibleHeight() ).contains( e->pos() ) && ( d->mousePressColumn < 0 && d->mousePressRow < 0 || (e->state() == NoButton && !d->pressedItem) ) ) return; // figure out in what direction to drag-select and perhaps scroll int dx = 0; int x = e->x(); if ( x >= visibleWidth() ) { x = visibleWidth()-1; dx = 1; } else if ( x < 0 ) { x = 0; dx = -1; } d->mouseMoveColumn = columnAt( x + contentsX() ); // sanitize mousePressColumn, if we got here without a mouse press event if ( d->mousePressColumn < 0 && d->mouseMoveColumn >= 0 ) d->mousePressColumn = d->mouseMoveColumn; if ( d->mousePressColumn < 0 && d->currentColumn >= 0 ) d->mousePressColumn = d->currentColumn; // if it's beyond the last column, use the last one if ( d->mouseMoveColumn < 0 ) d->mouseMoveColumn = dx >= 0 ? numColumns()-1 : 0; // repeat for y int dy = 0; int y = e->y(); if ( y >= visibleHeight() ) { y = visibleHeight()-1; dy = 1; } else if ( y < 0 ) { y = 0; dy = -1; } d->mouseMoveRow = rowAt( y + contentsY() ); if ( d->mousePressRow < 0 && d->mouseMoveRow >= 0 ) d->mousePressRow = d->mouseMoveRow; if ( d->mousePressRow < 0 && d->currentRow >= 0 ) d->mousePressRow = d->currentRow; if ( d->mousePressRow < 0 ) d->mousePressRow = rowAt( x + contentsX() ); d->scrollPos = QPoint( dx, dy ); if ( ( dx || dy ) && !d->scrollTimer && e->state() == LeftButton && e->button() != LeftButton ) { // start autoscrolling if necessary d->scrollTimer = new QTimer( this ); connect( d->scrollTimer, SIGNAL(timeout()), this, SLOT(doAutoScroll()) ); d->scrollTimer->start( 100, FALSE ); doAutoScroll(); } else if ( !d->scrollTimer ) { // or just select the required bits updateSelection(); } } void QListBox::updateSelection() { if ( d->mouseMoveColumn >= 0 && d->mouseMoveRow >= 0 && d->mousePressColumn >= 0 && d->mousePressRow >= 0 ) { QListBoxItem * i = item( d->mouseMoveColumn * numRows() + d->mouseMoveRow ); #if defined(QT_ACCESSIBILITY_SUPPORT) int ind = index(i); #endif if ( selectionMode() == Single || selectionMode() == NoSelection ) { if ( i && ( d->mouseInternalPress || testWFlags(WType_Popup) ) ) setCurrentItem( i ); } else { if ( d->selectionMode == Extended && ( ( d->current == d->pressedItem && d->pressedSelected ) || (d->dirtyDrag && !d->dragging) ) ) { if (d->dirtyDrag && !d->dragging) // emit after dragging stops d->dirtyDrag = FALSE; else clearSelection(); // dont reset drag-selected items d->pressedItem = 0; if ( i && i->isSelectable() ) { bool block = signalsBlocked(); blockSignals( TRUE ); i->s = TRUE; blockSignals( block ); emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::StateChanged ); QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::SelectionAdd ); #endif } triggerUpdate( FALSE ); } else { int c = QMIN( d->mouseMoveColumn, d->mousePressColumn ); int r = QMIN( d->mouseMoveRow, d->mousePressRow ); int c2 = QMAX( d->mouseMoveColumn, d->mousePressColumn ); int r2 = QMAX( d->mouseMoveRow, d->mousePressRow ); bool changed = FALSE; while( c <= c2 ) { QListBoxItem * i = item( c*numRows()+r ); int rtmp = r; while( i && rtmp <= r2 ) { if ( (bool)i->s != (bool)d->select && i->isSelectable() ) { i->s = d->select; #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::StateChanged ); QAccessible::updateAccessibility( viewport(), ind+1, d->select ? QAccessible::SelectionAdd : QAccessible::SelectionRemove ); #endif i->dirty = TRUE; d->dirtyDrag = changed = TRUE; } i = i->n; rtmp++; } c++; } if ( changed ) { if (!d->dragging) // emit after dragging stops instead emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); #endif triggerUpdate( FALSE ); } } if ( i ) setCurrentItem( i ); } } } void QListBox::repaintSelection() { if ( d->numColumns == 1 ) { for ( uint i = topItem(); itemVisible( i ) && i < count(); ++i ) { QListBoxItem *it = item(i); if ( !it ) break; if ( it->isSelected() ) updateItem( it ); } } else { for ( uint i = 0; i < count(); ++i ) { QListBoxItem *it = item(i); if ( !it ) break; if ( it->isSelected() ) updateItem( it ); } } } /*! \reimp */ void QListBox::contentsContextMenuEvent( QContextMenuEvent *e ) { if ( !receivers( SIGNAL(contextMenuRequested(QListBoxItem*,const QPoint&)) ) ) { e->ignore(); return; } if ( e->reason() == QContextMenuEvent::Keyboard ) { QListBoxItem *i = item( currentItem() ); if ( i ) { QRect r = itemRect( i ); emit contextMenuRequested( i, mapToGlobal( r.topLeft() + QPoint( width() / 2, r.height() / 2 ) ) ); } } else { QListBoxItem * i = itemAt( contentsToViewport( e->pos() ) ); emit contextMenuRequested( i, e->globalPos() ); } } /*!\reimp */ void QListBox::keyPressEvent( QKeyEvent *e ) { if ( ( e->key() == Qt::Key_Tab || e->key() == Qt::Key_Backtab ) && e->state() & Qt::ControlButton ) e->ignore(); if ( count() == 0 ) { e->ignore(); return; } QGuardedPtr selfCheck = this; QListBoxItem *old = d->current; if ( !old ) { setCurrentItem( d->head ); if ( d->selectionMode == Single ) setSelected( d->head, TRUE ); e->ignore(); return; } bool selectCurrent = FALSE; switch ( e->key() ) { case Key_Up: { d->currInputString = QString::null; if ( currentItem() > 0 ) { setCurrentItem( currentItem() - 1 ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Down: { d->currInputString = QString::null; if ( currentItem() < (int)count() - 1 ) { setCurrentItem( currentItem() + 1 ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Left: { d->currInputString = QString::null; if ( currentColumn() > 0 ) { setCurrentItem( currentItem() - numRows() ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } else if ( numColumns() > 1 && currentItem() > 0 ) { int row = currentRow(); setCurrentItem( currentRow() - 1 + ( numColumns() - 1 ) * numRows() ); if ( currentItem() == -1 ) setCurrentItem( row - 1 + ( numColumns() - 2 ) * numRows() ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } else { QApplication::sendEvent( horizontalScrollBar(), e ); } if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Right: { d->currInputString = QString::null; if ( currentColumn() < numColumns()-1 ) { int row = currentRow(); int i = currentItem(); QListBoxItem *it = item( i + numRows() ); if ( !it ) it = item( count()-1 ); setCurrentItem( it ); if ( currentItem() == -1 ) { if ( row < numRows() - 1 ) setCurrentItem( row + 1 ); else setCurrentItem( i ); } handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } else if ( numColumns() > 1 && currentRow() < numRows() ) { if ( currentRow() + 1 < numRows() ) { setCurrentItem( currentRow() + 1 ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); } } else { QApplication::sendEvent( horizontalScrollBar(), e ); } if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Next: { d->currInputString = QString::null; int i = 0; if ( numColumns() == 1 ) { i = currentItem() + numItemsVisible(); i = i > (int)count() - 1 ? (int)count() - 1 : i; setCurrentItem( i ); setBottomItem( i ); } else { // I'm not sure about this behavior... if ( currentRow() == numRows() - 1 ) i = currentItem() + numRows(); else i = currentItem() + numRows() - currentRow() - 1; i = i > (int)count() - 1 ? (int)count() - 1 : i; setCurrentItem( i ); } handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Prior: { selectCurrent = TRUE; d->currInputString = QString::null; int i; if ( numColumns() == 1 ) { i = currentItem() - numItemsVisible(); i = i < 0 ? 0 : i; setCurrentItem( i ); setTopItem( i ); } else { // I'm not sure about this behavior... if ( currentRow() == 0 ) i = currentItem() - numRows(); else i = currentItem() - currentRow(); i = i < 0 ? 0 : i; setCurrentItem( i ); } handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_Space: { selectCurrent = TRUE; d->currInputString = QString::null; toggleCurrentItem(); if ( selectionMode() == Extended && d->current->isSelected() ) emit highlighted( currentItem() ); if (selfCheck && (!( e->state() & ShiftButton ) || !d->selectAnchor)) d->selectAnchor = d->current; } break; case Key_Return: case Key_Enter: { selectCurrent = TRUE; d->currInputString = QString::null; if ( currentItem() >= 0 && selectionMode() != NoSelection ) { QString tmp = item( currentItem() )->text(); emit selected( currentItem()); emit selected( item( currentItem() ) ); if ( !tmp.isEmpty() ) emit selected( tmp ); emit returnPressed( item( currentItem() ) ); } if (selfCheck && (!( e->state() & ShiftButton ) || !d->selectAnchor)) d->selectAnchor = d->current; } break; case Key_Home: { selectCurrent = TRUE; d->currInputString = QString::null; setCurrentItem( 0 ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; case Key_End: { selectCurrent = TRUE; d->currInputString = QString::null; int i = (int)count() - 1; setCurrentItem( i ); handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton ); if ( !( e->state() & ShiftButton ) || !d->selectAnchor ) d->selectAnchor = d->current; } break; default: { if ( !e->text().isEmpty() && e->text()[ 0 ].isPrint() && count() ) { int curItem = currentItem(); if ( curItem == -1 ) curItem = 0; if ( !d->inputTimer->isActive() ) { d->currInputString = e->text(); curItem = d->findItemByName( ++curItem, d->currInputString ); } else { d->inputTimer->stop(); d->currInputString += e->text(); int oldCurItem = curItem; curItem = d->findItemByName( curItem, d->currInputString ); if ( curItem < 0 ) { curItem = d->findItemByName( ++oldCurItem, e->text() ); d->currInputString = e->text(); } } if ( curItem >= 0 ) setCurrentItem( curItem ); if ( curItem >= 0 && selectionMode() == QListBox::Extended ) { bool changed = FALSE; bool block = signalsBlocked(); blockSignals( TRUE ); selectAll( FALSE ); blockSignals( block ); QListBoxItem *i = item( curItem ); if ( !i->s && i->isSelectable() ) { changed = TRUE; i->s = TRUE; updateItem( i ); } if ( changed ) emit selectionChanged(); } d->inputTimer->start( 400, TRUE ); } else { d->currInputString = QString::null; if ( e->state() & ControlButton ) { switch ( e->key() ) { case Key_A: selectAll( TRUE ); break; } } else { e->ignore(); } } } } if (selfCheck && selectCurrent && selectionMode() == Single && d->current && !d->current->s ) { updateItem( d->current ); setSelected( d->current, TRUE ); } } /*!\reimp */ void QListBox::focusInEvent( QFocusEvent* ) { d->mousePressRow = -1; d->mousePressColumn = -1; d->inMenuMode = FALSE; if ( QFocusEvent::reason() != QFocusEvent::Mouse && !d->current && d->head ) { d->current = d->head; QListBoxItem *i = d->current; QString tmp; if ( i ) tmp = i->text(); int tmp2 = index( i ); emit highlighted( i ); if ( !tmp.isNull() ) emit highlighted( tmp ); emit highlighted( tmp2 ); emit currentChanged( i ); } if ( style().styleHint( QStyle::SH_ItemView_ChangeHighlightOnFocus, this ) ) repaintSelection(); if ( d->current ) { updateItem( currentItem() ); QRect mfrect = itemRect( d->current ); if ( mfrect.isValid() ) setMicroFocusHint( mfrect.x(), mfrect.y(), mfrect.width(), mfrect.height(), FALSE ); } } /*!\reimp */ void QListBox::focusOutEvent( QFocusEvent* ) { if (style().styleHint( QStyle::SH_ItemView_ChangeHighlightOnFocus, this )) { d->inMenuMode = QFocusEvent::reason() == QFocusEvent::Popup || (qApp->focusWidget() && qApp->focusWidget()->inherits("QMenuBar")); if ( !d->inMenuMode ) repaintSelection(); } if ( d->current ) updateItem( currentItem() ); } /*!\reimp */ bool QListBox::eventFilter( QObject *o, QEvent *e ) { //### remove in 4.0 return QScrollView::eventFilter( o, e ); } /*! Repaints the item at position \a index in the list. */ void QListBox::updateItem( int index ) { if ( index >= 0 ) updateItem( item( index ) ); } /*! \overload Repaints the QListBoxItem \a i. */ void QListBox::updateItem( QListBoxItem * i ) { if ( !i ) return; i->dirty = TRUE; d->updateTimer->start( 0, TRUE ); } /*! \property QListBox::selectionMode \brief the selection mode of the list box Sets the list box's selection mode, which may be one of \c Single (the default), \c Extended, \c Multi or \c NoSelection. \sa SelectionMode */ void QListBox::setSelectionMode( SelectionMode mode ) { if ( d->selectionMode == mode ) return; if ( ( selectionMode() == Multi || selectionMode() == Extended ) && ( mode == QListBox::Single || mode == QListBox::NoSelection ) ){ clearSelection(); if ( ( mode == QListBox::Single ) && currentItem() ) setSelected( currentItem(), TRUE ); } d->selectionMode = mode; triggerUpdate( TRUE ); } QListBox::SelectionMode QListBox::selectionMode() const { return d->selectionMode; } /*! \obsolete \property QListBox::multiSelection \brief whether or not the list box is in Multi selection mode Consider using the \l QListBox::selectionMode property instead of this property. When setting this property, Multi selection mode is used if set to TRUE and to Single selection mode if set to FALSE. When getting this property, TRUE is returned if the list box is in Multi selection mode or Extended selection mode, and FALSE if it is in Single selection mode or NoSelection mode. \sa selectionMode */ bool QListBox::isMultiSelection() const { return selectionMode() == Multi || selectionMode() == Extended; } void QListBox::setMultiSelection( bool enable ) { setSelectionMode( enable ? Multi : Single ); } /*! Toggles the selection status of currentItem() and repaints if the list box is a \c Multi selection list box. \sa setMultiSelection() */ void QListBox::toggleCurrentItem() { if ( selectionMode() == Single || selectionMode() == NoSelection || !d->current ) return; if ( d->current->s || d->current->isSelectable() ) { d->current->s = !d->current->s; emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) int ind = index( d->current ); QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::StateChanged ); QAccessible::updateAccessibility( viewport(), ind+1, d->current->s ? QAccessible::SelectionAdd : QAccessible::SelectionRemove ); #endif } updateItem( d->current ); } /*! \overload If \a select is TRUE the item at position \a index is selected; otherwise the item is deselected. */ void QListBox::setSelected( int index, bool select ) { setSelected( item( index ), select ); } /*! Selects \a item if \a select is TRUE or unselects it if \a select is FALSE, and repaints the item appropriately. If the list box is a \c Single selection list box and \a select is TRUE, setSelected() calls setCurrentItem(). If the list box is a \c Single selection list box, \a select is FALSE, setSelected() calls clearSelection(). \sa setMultiSelection(), setCurrentItem(), clearSelection(), currentItem() */ void QListBox::setSelected( QListBoxItem * item, bool select ) { if ( !item || !item->isSelectable() || (bool)item->s == select || d->selectionMode == NoSelection ) return; int ind = index( item ); bool emitHighlighted = (d->current != item) || ( item->s != (uint) select && select ); if ( selectionMode() == Single ) { if ( d->current != item ) { QListBoxItem *o = d->current; if ( d->current && d->current->s ) d->current->s = FALSE; d->current = item; #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::Focus ); #endif d->currentColumn = ind / numRows(); d->currentRow = ind % numRows(); if ( o ) updateItem( o ); } } item->s = (uint)select; updateItem( item ); if ( d->selectionMode == Single && select ) { emit selectionChanged( item ); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), ind+1, QAccessible::StateChanged ); #endif } emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); if ( d->selectionMode != Single ) QAccessible::updateAccessibility( viewport(), ind+1, select ? QAccessible::SelectionAdd : QAccessible::SelectionRemove ); #endif if ( emitHighlighted ) { QString tmp; if ( d->current ) tmp = d->current->text(); int tmp2 = index( d->current ); emit highlighted( d->current ); if ( !tmp.isNull() ) emit highlighted( tmp ); emit highlighted( tmp2 ); emit currentChanged( d->current ); } } /*! Returns TRUE if item \a i is selected; otherwise returns FALSE. */ bool QListBox::isSelected( int i ) const { if ( selectionMode() == Single && i != currentItem() ) return FALSE; QListBoxItem * lbi = item( i ); if ( !lbi ) return FALSE; // should not happen return lbi->s; } /*! \overload Returns TRUE if item \a i is selected; otherwise returns FALSE. */ bool QListBox::isSelected( const QListBoxItem * i ) const { if ( !i ) return FALSE; return i->s; } /*! Returns the selected item if the list box is in single-selection mode and an item is selected. If no items are selected or the list box is in another selection mode this function returns 0. \sa setSelected() setMultiSelection() */ QListBoxItem* QListBox::selectedItem() const { if ( d->selectionMode != Single ) return 0; if ( isSelected( currentItem() ) ) return d->current; return 0; } /*! Deselects all items, if possible. Note that a \c Single selection list box will automatically select an item if it has keyboard focus. */ void QListBox::clearSelection() { selectAll( FALSE ); } /*! In \c Multi and \c Extended modes, this function sets all items to be selected if \a select is TRUE, and to be unselected if \a select is FALSE. In \c Single and \c NoSelection modes, this function only changes the selection status of currentItem(). */ void QListBox::selectAll( bool select ) { if ( selectionMode() == Multi || selectionMode() == Extended ) { bool b = signalsBlocked(); blockSignals( TRUE ); for ( int i = 0; i < (int)count(); i++ ) setSelected( i, select ); blockSignals( b ); emit selectionChanged(); } else if ( d->current ) { QListBoxItem * i = d->current; setSelected( i, select ); } } /*! Inverts the selection. Only works in \c Multi and \c Extended selection mode. */ void QListBox::invertSelection() { if ( d->selectionMode == Single || d->selectionMode == NoSelection ) return; bool b = signalsBlocked(); blockSignals( TRUE ); for ( int i = 0; i < (int)count(); i++ ) setSelected( i, !item( i )->isSelected() ); blockSignals( b ); emit selectionChanged(); } /*! \obsolete Not used anymore; provided for binary compatibility */ void QListBox::emitChangedSignal( bool ) { } /*! \reimp */ QSize QListBox::sizeHint() const { if ( cachedSizeHint().isValid() ) return cachedSizeHint(); constPolish(); doLayout(); int i=0; while( i < 10 && i < (int)d->columnPos.size()-1 && d->columnPos[i] < 200 ) i++; int x; x = QMIN( 200, d->columnPos[i] + 2 * style().pixelMetric( QStyle::PM_DefaultFrameWidth ) ); x = QMAX( 40, x ); i = 0; while( i < 10 && i < (int)d->rowPos.size()-1 && d->rowPos[i] < 200 ) i++; int y; y = QMIN( 200, d->rowPos[i] + 2 * style().pixelMetric( QStyle::PM_DefaultFrameWidth ) ); y = QMAX( 40, y ); QSize s( x, y ); setCachedSizeHint( s ); return s; } /*! \reimp */ QSize QListBox::minimumSizeHint() const { return QScrollView::minimumSizeHint(); } /*! Ensures that a single paint event will occur at the end of the current event loop iteration. If \a doLayout is TRUE, the layout is also redone. */ void QListBox::triggerUpdate( bool doLayout ) { if ( doLayout ) d->layoutDirty = d->mustPaintAll = TRUE; d->updateTimer->start( 0, TRUE ); } void QListBox::setColumnMode( LayoutMode mode ) { if ( mode == Variable ) return; d->rowModeWins = FALSE; d->columnMode = mode; triggerUpdate( TRUE ); } void QListBox::setColumnMode( int columns ) { if ( columns < 1 ) columns = 1; d->columnMode = FixedNumber; d->numColumns = columns; d->rowModeWins = FALSE; triggerUpdate( TRUE ); } void QListBox::setRowMode( LayoutMode mode ) { if ( mode == Variable ) return; d->rowModeWins = TRUE; d->rowMode = mode; triggerUpdate( TRUE ); } void QListBox::setRowMode( int rows ) { if ( rows < 1 ) rows = 1; d->rowMode = FixedNumber; d->numRows = rows; d->rowModeWins = TRUE; triggerUpdate( TRUE ); } /*! \property QListBox::columnMode \brief the column layout mode for this list box. setColumnMode() sets the layout mode and adjusts the number of displayed columns. The row layout mode automatically becomes \c Variable, unless the column mode is \c Variable. \sa setRowMode() columnMode() rowMode numColumns */ QListBox::LayoutMode QListBox::columnMode() const { if ( d->rowModeWins ) return Variable; else return d->columnMode; } /*! \property QListBox::rowMode \brief the row layout mode for this list box This property is normally \c Variable. setRowMode() sets the layout mode and adjusts the number of displayed rows. The column layout mode automatically becomes \c Variable, unless the row mode is \c Variable. \sa columnMode rowMode */ QListBox::LayoutMode QListBox::rowMode() const { if ( d->rowModeWins ) return d->rowMode; else return Variable; } /*! \property QListBox::numColumns \brief the number of columns in the list box This is normally 1, but can be different if \l QListBox::columnMode or \l QListBox::rowMode has been set. \sa columnMode rowMode numRows */ int QListBox::numColumns() const { if ( count() == 0 ) return 0; if ( !d->rowModeWins && d->columnMode == FixedNumber ) return d->numColumns; doLayout(); return d->columnPos.size()-1; } /*! \property QListBox::numRows \brief the number of rows in the list box. This is equal to the number of items in the default single-column layout, but can be different. \sa columnMode rowMode numColumns */ int QListBox::numRows() const { if ( count() == 0 ) return 0; if ( d->rowModeWins && d->rowMode == FixedNumber ) return d->numRows; doLayout(); return d->rowPos.size()-1; } /*! This function does the hard layout work. You should never need to call it. */ void QListBox::doLayout() const { if ( !d->layoutDirty || d->resizeTimer->isActive() ) return; constPolish(); int c = count(); switch( rowMode() ) { case FixedNumber: // columnMode() is known to be Variable tryGeometry( d->numRows, (c+d->numRows-1)/d->numRows ); break; case FitToHeight: // columnMode() is known to be Variable if ( d->head ) { // this is basically the FitToWidth code, but edited to use rows. int maxh = 0; QListBoxItem * i = d->head; while ( i ) { int h = i->height(this); if ( maxh < h ) maxh = h; i = i->n; } int vh = viewportSize( 1, 1 ).height(); do { int rows = vh / maxh; if ( rows > c ) rows = c; if ( rows < 1 ) rows = 1; if ( variableHeight() && rows < c ) { do { ++rows; tryGeometry( rows, (c+rows-1)/rows ); } while ( rows <= c && d->rowPos[(int)d->rowPos.size()-1] <= vh ); --rows; } tryGeometry( rows, (c+rows-1)/rows ); int nvh = viewportSize( d->columnPos[(int)d->columnPos.size()-1], d->rowPos[(int)d->rowPos.size()-1] ).height(); if ( nvh < vh ) vh = nvh; } while ( d->rowPos.size() > 2 && vh < d->rowPos[(int)d->rowPos.size()-1] ); } else { tryGeometry( 1, 1 ); } break; case Variable: if ( columnMode() == FixedNumber ) { tryGeometry( (count()+d->numColumns-1)/d->numColumns, d->numColumns ); } else if ( d->head ) { // FitToWidth, at least one item int maxw = 0; QListBoxItem * i = d->head; while ( i ) { int w = i->width(this); if ( maxw < w ) maxw = w; i = i->n; } int vw = viewportSize( 1, 1 ).width(); do { int cols = vw / maxw; if ( cols > c ) cols = c; if ( cols < 1 ) cols = 1; if ( variableWidth() && cols < c ) { do { ++cols; tryGeometry( (c+cols-1)/cols, cols ); } while ( cols <= c && d->columnPos[(int)d->columnPos.size()-1] <= vw ); --cols; } tryGeometry( (c+cols-1)/cols, cols ); int nvw = viewportSize( d->columnPos[(int)d->columnPos.size()-1], d->rowPos[(int)d->rowPos.size()-1] ).width(); if ( nvw < vw ) vw = nvw; } while ( d->columnPos.size() > 2 && vw < d->columnPos[(int)d->columnPos.size()-1] ); } else { tryGeometry( 1, 1 ); } break; } d->layoutDirty = FALSE; int w = d->columnPos[(int)d->columnPos.size()-1]; int h = d->rowPos[(int)d->rowPos.size()-1]; QSize s( viewportSize( w, h ) ); w = QMAX( w, s.width() ); d->columnPosOne = d->columnPos[1]; // extend the column for simple single-column listboxes if ( columnMode() == FixedNumber && d->numColumns == 1 && d->columnPos[1] < w ) d->columnPos[1] = w; ((QListBox *)this)->resizeContents( w, h ); } /*! Lay the items out in a \a columns by \a rows array. The array may be too big: doLayout() is expected to call this with the right values. */ void QListBox::tryGeometry( int rows, int columns ) const { if ( columns < 1 ) columns = 1; d->columnPos.resize( columns+1 ); if ( rows < 1 ) rows = 1; d->rowPos.resize( rows+1 ); // funky hack I: dump the height/width of each column/row in // {column,row}Pos for later conversion to positions. int c; for( c=0; c<=columns; c++ ) d->columnPos[c] = 0; int r; for( r=0; r<=rows; r++ ) d->rowPos[r] = 0; r = c = 0; QListBoxItem * i = d->head; while ( i && c < columns ) { if ( i == d->current ) { d->currentRow = r; d->currentColumn = c; } int w = i->width(this); if ( d->columnPos[c] < w ) d->columnPos[c] = w; int h = i->height(this); if ( d->rowPos[r] < h ) d->rowPos[r] = h; i = i->n; r++; if ( r == rows ) { r = 0; c++; } } // funky hack II: if not variable {width,height}, unvariablify it. if ( !variableWidth() ) { int w = 0; for( c=0; ccolumnPos[c] ) w = d->columnPos[c]; for( c=0; ccolumnPos[c] = w; } if ( !variableHeight() ) { int h = 0; for( r=0; rrowPos[r] ) h = d->rowPos[r]; for( r=0; rrowPos[r] = h; } // repair the hacking. int x = 0; for( c=0; c<=columns; c++ ) { int w = d->columnPos[c]; d->columnPos[c] = x; x += w; } int y = 0; for( r=0; r<=rows; r++ ) { int h = d->rowPos[r]; d->rowPos[r] = y; y += h; } } /*! Returns the row index of the current item, or -1 if no item is the current item. */ int QListBox::currentRow() const { if ( !d->current ) return -1; if ( d->currentRow < 0 ) d->layoutDirty = TRUE; if ( d->layoutDirty ) doLayout(); return d->currentRow; } /*! Returns the column index of the current item, or -1 if no item is the current item. */ int QListBox::currentColumn() const { if ( !d->current ) return -1; if ( d->currentColumn < 0 ) d->layoutDirty = TRUE; if ( d->layoutDirty ) doLayout(); return d->currentColumn; } void QListBox::setTopItem( int index ) { if ( index >= (int)count() || count() == 0 ) return; int col = index / numRows(); int y = d->rowPos[index-col*numRows()]; if ( d->columnPos[col] >= contentsX() && d->columnPos[col+1] <= contentsX() + visibleWidth() ) setContentsPos( contentsX(), y ); else setContentsPos( d->columnPos[col], y ); } /*! Scrolls the list box so the item at position \a index in the list is displayed in the bottom row of the list box. \sa setTopItem() */ void QListBox::setBottomItem( int index ) { if ( index >= (int)count() || count() == 0 ) return; int col = index / numRows(); int y = d->rowPos[1+index-col*numRows()] - visibleHeight(); if ( y < 0 ) y = 0; if ( d->columnPos[col] >= contentsX() && d->columnPos[col+1] <= contentsX() + visibleWidth() ) setContentsPos( contentsX(), y ); else setContentsPos( d->columnPos[col], y ); } /*! Returns the item at point \a p, specified in viewport coordinates, or a 0 if there is no item at \a p. Use contentsToViewport() to convert between widget coordinates and viewport coordinates. */ QListBoxItem * QListBox::itemAt( const QPoint& p ) const { if ( d->layoutDirty ) doLayout(); QPoint np = p; // take into acount frame margin to get to viewport np -= viewport()->pos(); if (!viewport()->rect().contains(np)) return 0; // take into account contents position np = viewportToContents( np ); int x = np.x(); int y = np.y(); // return 0 when y is below the last row if ( y > d->rowPos[ numRows() ] ) return 0; int col = columnAt( x ); int row = rowAt( y ); QListBoxItem *i = item( col * numRows() + row ); if ( i && numColumns() > 1 ) { if ( d->columnPos[ col ] + i->width( this ) >= x ) return i; } else { if ( d->columnPos[ col + 1 ] >= x ) return i; } return 0; } /*! Ensures that the current item is visible. */ void QListBox::ensureCurrentVisible() { if ( !d->current ) return; doLayout(); int row = currentRow(); int column = currentColumn(); int w = ( d->columnPos[column+1] - d->columnPos[column] ) / 2; int h = ( d->rowPos[row+1] - d->rowPos[row] ) / 2; // next four lines are Bad. they mean that for pure left-to-right // languages, textual list box items are displayed better than // before when there is little space. for non-textual items, or // other languages, it means... that you really should have enough // space in the first place :) if ( numColumns() == 1 ) w = 0; if ( w*2 > viewport()->width() ) w = viewport()->width()/2; ensureVisible( d->columnPos[column] + w, d->rowPos[row] + h, w, h); } /*! \internal */ void QListBox::doAutoScroll() { if ( d->scrollPos.x() < 0 ) { // scroll left int x = contentsX() - horizontalScrollBar()->lineStep(); if ( x < 0 ) x = 0; if ( x != contentsX() ) { d->mouseMoveColumn = columnAt( x ); updateSelection(); if ( x < contentsX() ) setContentsPos( x, contentsY() ); } } else if ( d->scrollPos.x() > 0 ) { // scroll right int x = contentsX() + horizontalScrollBar()->lineStep(); if ( x + visibleWidth() > contentsWidth() ) x = contentsWidth() - visibleWidth(); if ( x != contentsX() ) { d->mouseMoveColumn = columnAt( x + visibleWidth() - 1 ); updateSelection(); if ( x > contentsX() ) setContentsPos( x, contentsY() ); } } if ( d->scrollPos.y() < 0 ) { // scroll up int y = contentsY() - verticalScrollBar()->lineStep(); if ( y < 0 ) y = 0; if ( y != contentsY() ) { y = contentsY() - verticalScrollBar()->lineStep(); d->mouseMoveRow = rowAt( y ); updateSelection(); } } else if ( d->scrollPos.y() > 0 ) { // scroll down int y = contentsY() + verticalScrollBar()->lineStep(); if ( y + visibleHeight() > contentsHeight() ) y = contentsHeight() - visibleHeight(); if ( y != contentsY() ) { y = contentsY() + verticalScrollBar()->lineStep(); d->mouseMoveRow = rowAt(y + visibleHeight() - 1 ); updateSelection(); } } if ( d->scrollPos == QPoint( 0, 0 ) ) { delete d->scrollTimer; d->scrollTimer = 0; } } /*! \property QListBox::topItem \brief the index of an item at the top of the screen. When getting this property and the listbox has multiple columns, an arbitrary item is selected and returned. When setting this property, the list box is scrolled so the item at position \e index in the list is displayed in the top row of the list box. */ int QListBox::topItem() const { doLayout(); // move rightwards to the best column int col = columnAt( contentsX() ); int row = rowAt( contentsY() ); return col * numRows() + row; } /*! \property QListBox::variableHeight \brief whether this list box has variable-height rows When the list box has variable-height rows (the default), each row is as high as the highest item in that row. When it has same-sized rows, all rows are as high as the highest item in the list box. \sa variableWidth */ bool QListBox::variableHeight() const { return d->variableHeight; } void QListBox::setVariableHeight( bool enable ) { if ( (bool)d->variableHeight == enable ) return; d->variableHeight = enable; triggerUpdate( TRUE ); } /*! \property QListBox::variableWidth \brief whether this list box has variable-width columns When the list box has variable-width columns, each column is as wide as the widest item in that column. When it has same-sized columns (the default), all columns are as wide as the widest item in the list box. \sa variableHeight */ bool QListBox::variableWidth() const { return d->variableWidth; } void QListBox::setVariableWidth( bool enable ) { if ( (bool)d->variableWidth == enable ) return; d->variableWidth = enable; triggerUpdate( TRUE ); } /*! Repaints only what really needs to be repainted. */ void QListBox::refreshSlot() { if ( d->mustPaintAll || d->layoutDirty ) { d->mustPaintAll = FALSE; bool currentItemVisible = itemVisible( currentItem() ); doLayout(); if ( hasFocus() && currentItemVisible && d->currentColumn >= 0 && d->currentRow >= 0 && ( d->columnPos[d->currentColumn] < contentsX() || d->columnPos[d->currentColumn+1]>contentsX()+visibleWidth() || d->rowPos[d->currentRow] < contentsY() || d->rowPos[d->currentRow+1] > contentsY()+visibleHeight() ) ) ensureCurrentVisible(); viewport()->repaint( FALSE ); return; } QRegion r; int x = contentsX(); int y = contentsY(); int col = columnAt( x ); int row = rowAt( y ); int top = row; while( col < (int)d->columnPos.size()-1 && d->columnPos[col+1] < x ) col++; while( top < (int)d->rowPos.size()-1 && d->rowPos[top+1] < y ) top++; QListBoxItem * i = item( col * numRows() + row ); while ( i && (int)col < numColumns() && d->columnPos[col] < x + visibleWidth() ) { int cw = d->columnPos[col+1] - d->columnPos[col]; while ( i && row < numRows() && d->rowPos[row] < y + visibleHeight() ) { if ( i->dirty ) r = r.unite( QRect( d->columnPos[col] - x, d->rowPos[row] - y, cw, d->rowPos[row+1] - d->rowPos[row] ) ); row++; i = i->n; } col++; if ( numColumns() > 1 ) { row = top; i = item( col * numRows() + row ); } } if ( r.isEmpty() ) viewport()->repaint( FALSE ); else viewport()->repaint( r, FALSE ); } /*! \reimp */ void QListBox::viewportPaintEvent( QPaintEvent * e ) { doLayout(); QWidget* vp = viewport(); QPainter p( vp ); QRegion r = e->region(); #if 0 { // this stuff has been useful enough times that from now I'm // leaving it in the source. uint i = 0; tqDebug( "%s/%s: %i rects", className(), name(), r.rects().size() ); while( i < r.rects().size() ) { tqDebug( "rect %d: %d, %d, %d, %d", i, r.rects()[i].left(), r.rects()[i].top(), r.rects()[i].width(), r.rects()[i].height() ); i++; } tqDebug( "" ); } #endif int x = contentsX(); int y = contentsY(); int w = vp->width(); int h = vp->height(); int col = columnAt( x ); int top = rowAt( y ); int row = top; QListBoxItem * i = item( col*numRows() + row ); const QColorGroup & g = colorGroup(); p.setPen( g.text() ); p.setBackgroundColor( backgroundBrush().color() ); while ( i && (int)col < numColumns() && d->columnPos[col] < x + w ) { int cw = d->columnPos[col+1] - d->columnPos[col]; while ( i && (int)row < numRows() && d->rowPos[row] < y + h ) { int ch = d->rowPos[row+1] - d->rowPos[row]; QRect itemRect( d->columnPos[col]-x, d->rowPos[row]-y, cw, ch ); QRegion tempRegion( itemRect ); QRegion itemPaintRegion( tempRegion.intersect( r ) ); if ( !itemPaintRegion.isEmpty() ) { p.save(); p.setClipRegion( itemPaintRegion ); p.translate( d->columnPos[col]-x, d->rowPos[row]-y ); paintCell( &p, row, col ); p.restore(); r = r.subtract( itemPaintRegion ); } row++; if ( i->dirty ) { // reset dirty flag only if the entire item was painted if ( itemPaintRegion == QRegion( itemRect ) ) i->dirty = FALSE; } i = i->n; } col++; if ( numColumns() > 1 ) { row = top; i = item( col * numRows() + row ); } } if ( r.isEmpty() ) return; p.setClipRegion( r ); p.fillRect( 0, 0, w, h, viewport()->backgroundBrush() ); } /*! Returns the height in pixels of the item with index \a index. \a index defaults to 0. If \a index is too large, this function returns 0. */ int QListBox::itemHeight( int index ) const { if ( index >= (int)count() || index < 0 ) return 0; int r = index % numRows(); return d->rowPos[r+1] - d->rowPos[r]; } /*! Returns the index of the column at \a x, which is in the listbox's coordinates, not in on-screen coordinates. If there is no column that spans \a x, columnAt() returns -1. */ int QListBox::columnAt( int x ) const { if ( x < 0 ) return -1; if ( !d->columnPos.size() ) return -1; if ( x >= d->columnPos[(int)d->columnPos.size()-1 ] ) return numColumns() - 1; int col = 0; while( col < (int)d->columnPos.size()-1 && d->columnPos[col+1] < x ) col++; return col; } /*! Returns the index of the row at \a y, which is in the listbox's coordinates, not in on-screen coordinates. If there is no row that spans \a y, rowAt() returns -1. */ int QListBox::rowAt( int y ) const { if ( y < 0 ) return -1; // find the top item, use bsearch for speed int l = 0; int r = d->rowPos.size() - 2; if ( r < 0 ) return -1; if ( l <= d->rowPosCache && d->rowPosCache <= r ) { if ( d->rowPos[ QMAX( l, d->rowPosCache - 10 ) ] <= y && y <= d->rowPos[ QMIN( r, d->rowPosCache + 10 ) ] ) { l = QMAX( l, d->rowPosCache - 10 ); r = QMIN( r, d->rowPosCache + 10 ); } } int i = ( (l+r+1) / 2 ); while ( r - l ) { if ( d->rowPos[i] > y ) r = i -1; else l = i; i = ( (l+r+1) / 2 ); } d->rowPosCache = i; if ( d->rowPos[i] <= y && y <= d->rowPos[i+1] ) return i; return d->count - 1; } /*! Returns the rectangle on the screen that \a item occupies in viewport()'s coordinates, or an invalid rectangle if \a item is 0 or is not currently visible. */ QRect QListBox::itemRect( QListBoxItem *item ) const { if ( d->resizeTimer->isActive() ) return QRect( 0, 0, -1, -1 ); if ( !item ) return QRect( 0, 0, -1, -1 ); int i = index( item ); int col = i / numRows(); int row = i % numRows(); int x = d->columnPos[ col ] - contentsX(); int y = d->rowPos[ row ] - contentsY(); QRect r( x, y, d->columnPos[ col + 1 ] - d->columnPos[ col ], d->rowPos[ row + 1 ] - d->rowPos[ row ] ); if ( r.intersects( QRect( 0, 0, visibleWidth(), visibleHeight() ) ) ) return r; return QRect( 0, 0, -1, -1 ); } #ifndef QT_NO_COMPAT /*! \obsolete Using this method is quite inefficient. We suggest to use insertItem() for inserting and sort() afterwards. Inserts \a lbi at its sorted position in the list box and returns the position. All items must be inserted with inSort() to maintain the sorting order. inSort() treats any pixmap (or user-defined type) as lexicographically less than any string. \sa insertItem(), sort() */ int QListBox::inSort( const QListBoxItem * lbi ) { tqObsolete( "QListBox", "inSort", "insertItem" ); if ( !lbi ) return -1; QListBoxItem * i = d->head; int c = 0; while( i && i->text() < lbi->text() ) { i = i->n; c++; } insertItem( lbi, c ); return c; } /*! \obsolete \overload Using this method is quite inefficient. We suggest to use insertItem() for inserting and sort() afterwards. Inserts a new item of \a text at its sorted position in the list box and returns the position. All items must be inserted with inSort() to maintain the sorting order. inSort() treats any pixmap (or user-defined type) as lexicographically less than any string. \sa insertItem(), sort() */ int QListBox::inSort( const QString& text ) { tqObsolete( "QListBox", "inSort", "insertItem" ); return inSort( new QListBoxText(text) ); } #endif /*! \reimp */ void QListBox::resizeEvent( QResizeEvent *e ) { d->layoutDirty = ( d->layoutDirty || rowMode() == FitToHeight || columnMode() == FitToWidth ); if ( !d->layoutDirty && columnMode() == FixedNumber && d->numColumns == 1) { int w = d->columnPosOne; QSize s( viewportSize( w, contentsHeight() ) ); w = QMAX( w, s.width() ); d->columnPos[1] = QMAX( w, d->columnPosOne ); resizeContents( d->columnPos[1], contentsHeight() ); } if ( d->resizeTimer->isActive() ) d->resizeTimer->stop(); if ( d->rowMode == FixedNumber && d->columnMode == FixedNumber ) { bool currentItemVisible = itemVisible( currentItem() ); doLayout(); QScrollView::resizeEvent( e ); if ( currentItemVisible ) ensureCurrentVisible(); if ( d->current ) viewport()->repaint( itemRect( d->current ), FALSE ); } else if ( ( d->columnMode == FitToWidth || d->rowMode == FitToHeight ) && !(isVisible()) ) { QScrollView::resizeEvent( e ); } else if ( d->layoutDirty ) { d->resizeTimer->start( 100, TRUE ); resizeContents( contentsWidth() - ( e->oldSize().width() - e->size().width() ), contentsHeight() - ( e->oldSize().height() - e->size().height() ) ); QScrollView::resizeEvent( e ); } else { QScrollView::resizeEvent( e ); } } /*! \internal */ void QListBox::adjustItems() { triggerUpdate( TRUE ); ensureCurrentVisible(); } /*! Provided for compatibility with the old QListBox. We recommend using QListBoxItem::paint() instead. Repaints the cell at \a row, \a col using painter \a p. */ void QListBox::paintCell( QPainter * p, int row, int col ) { bool drawActiveSelection = hasFocus() || d->inMenuMode || !style().styleHint( QStyle::SH_ItemView_ChangeHighlightOnFocus, this ); const QColorGroup &g = ( drawActiveSelection ? colorGroup() : palette().inactive() ); int cw = d->columnPos[col+1] - d->columnPos[col]; int ch = d->rowPos[row+1] - d->rowPos[row]; QListBoxItem * i = item( col*numRows()+row ); p->save(); if ( i->s ) { if ( i->custom_highlight ) { p->fillRect( 0, 0, cw, ch, g.brush( QPalette::backgroundRoleFromMode( viewport()->backgroundMode() ) ) ); p->setPen( g.highlightedText() ); p->setBackgroundColor( g.highlight() ); } else if ( numColumns() == 1 ) { p->fillRect( 0, 0, cw, ch, g.brush( QColorGroup::Highlight ) ); p->setPen( g.highlightedText() ); p->setBackgroundColor( g.highlight() ); } else { int iw = i->width( this ); p->fillRect( 0, 0, iw, ch, g.brush( QColorGroup::Highlight ) ); p->fillRect( iw, 0, cw - iw + 1, ch, g.brush( QPalette::backgroundRoleFromMode( viewport()->backgroundMode() ) ) ); p->setPen( g.highlightedText() ); p->setBackgroundColor( g.highlight() ); } } else { p->fillRect( 0, 0, cw, ch, g.brush( QPalette::backgroundRoleFromMode( viewport()->backgroundMode() ) ) ); } i->paint( p ); if ( d->current == i && hasFocus() && !i->custom_highlight ) { if ( numColumns() > 1 ) cw = i->width( this ); style().drawPrimitive( QStyle::PE_FocusRect, p, QRect( 0, 0, cw, ch ), g, QStyle::Style_FocusAtBorder, QStyleOption(i->isSelected() ? g.highlight() : g.base() ) ); } p->restore(); } /*! Returns the width of the widest item in the list box. */ long QListBox::maxItemWidth() const { if ( d->layoutDirty ) doLayout(); long m = 0; int i = d->columnPos.size(); while( i-- ) if ( m < d->columnPos[i] ) m = d->columnPos[i]; return m; } /*! \reimp */ void QListBox::showEvent( QShowEvent * ) { d->ignoreMoves = FALSE; d->mousePressRow = -1; d->mousePressColumn = -1; d->mustPaintAll = FALSE; ensureCurrentVisible(); } #ifndef QT_NO_COMPAT /*! \obsolete Returns the vertical pixel-coordinate in \a *yPos, of the list box item at position \a index in the list. Returns FALSE if the item is outside the visible area. */ bool QListBox::itemYPos( int index, int *yPos ) const { tqObsolete( "QListBox", "itemYPos" ); QListBoxItem* i = item(index); if ( !i ) return FALSE; if ( yPos ) *yPos = i->y; return TRUE; } #endif /*! \fn bool QListBoxItem::isSelected() const Returns TRUE if the item is selected; otherwise returns FALSE. \sa QListBox::isSelected(), isCurrent() */ /*! \fn bool QListBoxItem::selected() const \obsolete */ /*! Returns TRUE if the item is the current item; otherwise returns FALSE. \sa QListBox::currentItem(), QListBox::item(), isSelected() */ bool QListBoxItem::isCurrent() const { return listBox() && listBox()->hasFocus() && listBox()->item( listBox()->currentItem() ) == this; } /*! \fn bool QListBoxItem::current() const \obsolete */ /*! \fn void QListBox::centerCurrentItem() \obsolete This function does exactly the same as ensureCurrentVisible() \sa QListBox::ensureCurrentVisible() */ /*! Returns a pointer to the list box containing this item. */ QListBox * QListBoxItem::listBox() const { return lbox; } /*! Removes \a item from the list box and causes an update of the screen display. The item is not deleted. You should normally not need to call this function because QListBoxItem::~QListBoxItem() calls it. The normal way to delete an item is with \c delete. \sa QListBox::insertItem() */ void QListBox::takeItem( const QListBoxItem * item ) { if ( !item || d->clearing ) return; d->cache = 0; d->count--; if ( item == d->last ) d->last = d->last->p; if ( item->p && item->p->n == item ) item->p->n = item->n; if ( item->n && item->n->p == item ) item->n->p = item->p; if ( d->head == item ) { d->head = item->n; d->currentColumn = d->currentRow = -1; } if ( d->current == item ) { d->current = item->n ? item->n : item->p; QListBoxItem *i = d->current; QString tmp; if ( i ) tmp = i->text(); int tmp2 = index( i ); emit highlighted( i ); if ( !tmp.isNull() ) emit highlighted( tmp ); emit highlighted( tmp2 ); emit currentChanged( i ); } if ( d->tmpCurrent == item ) d->tmpCurrent = d->current; if ( d->selectAnchor == item ) d->selectAnchor = d->current; if ( item->s ) emit selectionChanged(); ((QListBoxItem *)item)->lbox = 0; triggerUpdate( TRUE ); } /*! \internal Finds the next item after start beginning with \a text. */ int QListBoxPrivate::findItemByName( int start, const QString &text ) { if ( start < 0 || (uint)start >= listBox->count() ) start = 0; QString match = text.lower(); if ( match.length() < 1 ) return start; QString curText; int item = start; do { curText = listBox->text( item ).lower(); if ( curText.startsWith( match ) ) return item; item++; if ( (uint)item == listBox->count() ) item = 0; } while ( item != start ); return -1; } /*! \internal --- obsolete! */ void QListBox::clearInputString() { d->currInputString = QString::null; } /*! Finds the first list box item that has the text \a text and returns it, or returns 0 of no such item could be found. The search starts from the current item if the current item exists, otherwise it starts from the first list box item. If \c ComparisonFlags are specified in \a compare then these flags are used, otherwise the default is a case-insensitive, "begins with" search. \sa Qt::StringComparisonMode */ QListBoxItem *QListBox::findItem( const QString &text, ComparisonFlags compare ) const { if ( text.isEmpty() ) return 0; if ( compare == CaseSensitive || compare == 0 ) compare |= ExactMatch; QString itmtxt; QString comtxt = text; if ( ! (compare & CaseSensitive ) ) comtxt = text.lower(); QListBoxItem *item; if ( d->current ) item = d->current; else item = d->head; QListBoxItem *beginsWithItem = 0; QListBoxItem *endsWithItem = 0; QListBoxItem *containsItem = 0; if ( item ) { for ( ; item; item = item->n ) { if ( ! (compare & CaseSensitive) ) itmtxt = item->text().lower(); else itmtxt = item->text(); if ( compare & ExactMatch && itmtxt == comtxt ) return item; if ( compare & BeginsWith && !beginsWithItem && itmtxt.startsWith( comtxt ) ) beginsWithItem = containsItem = item; if ( compare & EndsWith && !endsWithItem && itmtxt.endsWith( comtxt ) ) endsWithItem = containsItem = item; if ( compare & Contains && !containsItem && itmtxt.contains( comtxt ) ) containsItem = item; } if ( d->current && d->head ) { item = d->head; for ( ; item && item != d->current; item = item->n ) { if ( ! (compare & CaseSensitive) ) itmtxt = item->text().lower(); else itmtxt = item->text(); if ( compare & ExactMatch && itmtxt == comtxt ) return item; if ( compare & BeginsWith && !beginsWithItem && itmtxt.startsWith( comtxt ) ) beginsWithItem = containsItem = item; if ( compare & EndsWith && !endsWithItem && itmtxt.endsWith( comtxt ) ) endsWithItem = containsItem = item; if ( compare & Contains && !containsItem && itmtxt.contains( comtxt ) ) containsItem = item; } } } // Obey the priorities if ( beginsWithItem ) return beginsWithItem; else if ( endsWithItem ) return endsWithItem; else if ( containsItem ) return containsItem; return 0; } /*! \internal */ void QListBox::drawRubber() { if ( !d->rubber ) return; if ( !d->rubber->width() && !d->rubber->height() ) return; QPainter p( viewport() ); p.setRasterOp( NotROP ); style().drawPrimitive( QStyle::PE_RubberBand, &p, d->rubber->normalize(), colorGroup() ); p.end(); } /*! \internal */ void QListBox::doRubberSelection( const QRect &old, const QRect &rubber ) { QListBoxItem *i = d->head; QRect ir, pr; bool changed = FALSE; for ( ; i; i = i->n ) { ir = itemRect( i ); if ( ir == QRect( 0, 0, -1, -1 ) ) continue; if ( i->isSelected() && !ir.intersects( rubber ) && ir.intersects( old ) ) { i->s = FALSE; pr = pr.unite( ir ); changed = TRUE; } else if ( !i->isSelected() && ir.intersects( rubber ) ) { if ( i->isSelectable() ) { i->s = TRUE; pr = pr.unite( ir ); changed = TRUE; } } } if ( changed ) { emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); #endif } viewport()->repaint( pr, TRUE ); } /*! Returns TRUE if the user is selecting items using a rubber band rectangle; otherwise returns FALSE. */ bool QListBox::isRubberSelecting() const { return d->rubber != 0; } /*! Returns the item that comes after this in the list box. If this is the last item, 0 is returned. \sa prev() */ QListBoxItem *QListBoxItem::next() const { return n; } /*! Returns the item which comes before this in the list box. If this is the first item, 0 is returned. \sa next() */ QListBoxItem *QListBoxItem::prev() const { return p; } /*! Returns the first item in this list box. If the list box is empty, returns 0. */ QListBoxItem *QListBox::firstItem() const { return d->head; } #if defined(Q_C_CALLBACKS) extern "C" { #endif #ifdef Q_OS_TEMP static int _cdecl cmpListBoxItems( const void *n1, const void *n2 ) #else static int cmpListBoxItems( const void *n1, const void *n2 ) #endif { if ( !n1 || !n2 ) return 0; QListBoxPrivate::SortableItem *i1 = (QListBoxPrivate::SortableItem *)n1; QListBoxPrivate::SortableItem *i2 = (QListBoxPrivate::SortableItem *)n2; return i1->item->text().localeAwareCompare( i2->item->text() ); } #if defined(Q_C_CALLBACKS) } #endif /*! If \a ascending is TRUE sorts the items in ascending order; otherwise sorts in descending order. To compare the items, the text (QListBoxItem::text()) of the items is used. */ void QListBox::sort( bool ascending ) { if ( count() == 0 ) return; d->cache = 0; QListBoxPrivate::SortableItem *items = new QListBoxPrivate::SortableItem[ count() ]; QListBoxItem *item = d->head; int i = 0; for ( ; item; item = item->n ) items[ i++ ].item = item; qsort( items, count(), sizeof( QListBoxPrivate::SortableItem ), cmpListBoxItems ); QListBoxItem *prev = 0; item = 0; if ( ascending ) { for ( i = 0; i < (int)count(); ++i ) { item = items[ i ].item; if ( item ) { item->p = prev; item->dirty = TRUE; if ( item->p ) item->p->n = item; item->n = 0; } if ( i == 0 ) d->head = item; prev = item; } } else { for ( i = (int)count() - 1; i >= 0 ; --i ) { item = items[ i ].item; if ( item ) { item->p = prev; item->dirty = TRUE; if ( item->p ) item->p->n = item; item->n = 0; } if ( i == (int)count() - 1 ) d->head = item; prev = item; } } d->last = item; delete [] items; // We have to update explicitly in case the current "vieport" overlaps the // new viewport we set (starting at (0,0)). bool haveToUpdate = contentsX() < visibleWidth() || contentsY() < visibleHeight(); setContentsPos( 0, 0 ); if ( haveToUpdate ) updateContents( 0, 0, visibleWidth(), visibleHeight() ); } void QListBox::handleItemChange( QListBoxItem *old, bool shift, bool control ) { if ( d->selectionMode == Single ) { // nothing } else if ( d->selectionMode == Extended ) { if ( shift ) { selectRange( d->selectAnchor ? d->selectAnchor : old, d->current, FALSE, TRUE, (d->selectAnchor && !control) ? TRUE : FALSE ); } else if ( !control ) { bool block = signalsBlocked(); blockSignals( TRUE ); selectAll( FALSE ); blockSignals( block ); setSelected( d->current, TRUE ); } } else if ( d->selectionMode == Multi ) { if ( shift ) selectRange( old, d->current, TRUE, FALSE ); } } void QListBox::selectRange( QListBoxItem *from, QListBoxItem *to, bool invert, bool includeFirst, bool clearSel ) { if ( !from || !to ) return; if ( from == to && !includeFirst ) return; QListBoxItem *i = 0; int index =0; int f_idx = -1, t_idx = -1; for ( i = d->head; i; i = i->n, index++ ) { if ( i == from ) f_idx = index; if ( i == to ) t_idx = index; if ( f_idx != -1 && t_idx != -1 ) break; } if ( f_idx > t_idx ) { i = from; from = to; to = i; if ( !includeFirst ) to = to->prev(); } else { if ( !includeFirst ) from = from->next(); } bool changed = FALSE; if ( clearSel ) { for ( i = d->head; i && i != from; i = i->n ) { if ( i->s ) { i->s = FALSE; changed = TRUE; updateItem( i ); } } for ( i = to->n; i; i = i->n ) { if ( i->s ) { i->s = FALSE; changed = TRUE; updateItem( i ); } } } for ( i = from; i; i = i->next() ) { if ( !invert ) { if ( !i->s && i->isSelectable() ) { i->s = TRUE; changed = TRUE; updateItem( i ); } } else { bool sel = !i->s; if ( (bool)i->s != sel && sel && i->isSelectable() || !sel ) { i->s = sel; changed = TRUE; updateItem( i ); } } if ( i == to ) break; } if ( changed ) { emit selectionChanged(); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( viewport(), 0, QAccessible::Selection ); #endif } } /*! \reimp */ void QListBox::windowActivationChange( bool oldActive ) { if ( oldActive && d->scrollTimer ) d->scrollTimer->stop(); if ( palette().active() != palette().inactive() ) viewport()->update(); QScrollView::windowActivationChange( oldActive ); } int QListBoxItem::RTTI = 0; /*! Returns 0. Make your derived classes return their own values for rtti(), and you can distinguish between listbox items. You should use values greater than 1000 preferably a large random number, to allow for extensions to this class. */ int QListBoxItem::rtti() const { return RTTI; } #endif // QT_NO_LISTBOX