From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/customlayout-example.html | 851 +++++++++++++++++++++++++++++++++++++ 1 file changed, 851 insertions(+) create mode 100644 doc/html/customlayout-example.html (limited to 'doc/html/customlayout-example.html') diff --git a/doc/html/customlayout-example.html b/doc/html/customlayout-example.html new file mode 100644 index 0000000..a8f0ab2 --- /dev/null +++ b/doc/html/customlayout-example.html @@ -0,0 +1,851 @@ + + + + + +Customized Layoutmanager + + + + + + + +

Customized Layoutmanager

+ + +

+This examples demonstrates how to write customized layout (geometry) managers +like card layouts, border layout and flow layouts. +

Header file of the flow layout: +

/****************************************************************************
+** $Id: qt/flow.h   3.3.8   edited Jan 11 14:46 $
+**
+** Definition of simple flow layout for custom layout example
+**
+** Created : 979899
+**
+** Copyright (C) 1997-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef FLOW_H
+#define FLOW_H
+
+#include <qlayout.h>
+#include <qptrlist.h>
+
+class SimpleFlow : public QLayout
+{
+public:
+    SimpleFlow( QWidget *parent, int border=0, int space=-1,
+                const char *name=0 )
+        : QLayout( parent, border, space, name ),
+        cached_width(0) {}
+    SimpleFlow( QLayout* parent, int space=-1, const char *name=0 )
+        : QLayout( parent, space, name ),
+        cached_width(0) {}
+    SimpleFlow( int space=-1, const char *name=0 )
+        : QLayout( space, name ),
+        cached_width(0) {}
+
+    ~SimpleFlow();
+
+    void addItem( QLayoutItem *item);
+    bool hasHeightForWidth() const;
+    int heightForWidth( int ) const;
+    QSize sizeHint() const;
+    QSize minimumSize() const;
+    QLayoutIterator iterator();
+    QSizePolicy::ExpandData expanding() const;
+
+protected:
+    void setGeometry( const QRect& );
+
+private:
+    int doLayout( const QRect&, bool testonly = FALSE );
+    QPtrList<QLayoutItem> list;
+    int cached_width;
+    int cached_hfw;
+
+};
+
+#endif
+

+ +

Implementation of the flow layout: +

/****************************************************************************
+** $Id: qt/flow.cpp   3.3.8   edited Jan 11 14:46 $
+**
+** Implementing your own layout: flow example
+**
+** Copyright (C) 1996-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "flow.h"
+
+class SimpleFlowIterator :public QGLayoutIterator
+{
+public:
+    SimpleFlowIterator( QPtrList<QLayoutItem> *l ) :idx(0), list(l)  {}
+    uint count() const;
+    QLayoutItem *current();
+    QLayoutItem *next();
+    QLayoutItem *takeCurrent();
+
+private:
+    int idx;
+    QPtrList<QLayoutItem> *list;
+
+};
+
+uint SimpleFlowIterator::count() const
+{
+    return list->count();
+}
+
+QLayoutItem *SimpleFlowIterator::current()
+{
+    return idx < int(count()) ? list->at(idx) : 0;
+}
+
+QLayoutItem *SimpleFlowIterator::next()
+{
+    idx++; return current();
+}
+
+QLayoutItem *SimpleFlowIterator::takeCurrent()
+{
+    return idx < int(count()) ? list->take( idx ) : 0;
+}
+
+SimpleFlow::~SimpleFlow()
+{
+    deleteAllItems();
+}
+
+
+int SimpleFlow::heightForWidth( int w ) const
+{
+    if ( cached_width != w ) {
+        //Not all C++ compilers support "mutable" yet:
+        SimpleFlow * mthis = (SimpleFlow*)this;
+        int h = mthis->doLayout( QRect(0,0,w,0), TRUE );
+        mthis->cached_hfw = h;
+        mthis->cached_width = w;
+        return h;
+    }
+    return cached_hfw;
+}
+
+void SimpleFlow::addItem( QLayoutItem *item)
+{
+    list.append( item );
+}
+
+bool SimpleFlow::hasHeightForWidth() const
+{
+    return TRUE;
+}
+
+QSize SimpleFlow::sizeHint() const
+{
+    return minimumSize();
+}
+
+QSizePolicy::ExpandData SimpleFlow::expanding() const
+{
+    return QSizePolicy::NoDirection;
+}
+
+QLayoutIterator SimpleFlow::iterator()
+{
+    return QLayoutIterator( new SimpleFlowIterator( &list ) );
+}
+
+void SimpleFlow::setGeometry( const QRect &r )
+{
+    QLayout::setGeometry( r );
+    doLayout( r );
+}
+
+int SimpleFlow::doLayout( const QRect &r, bool testonly )
+{
+    int x = r.x();
+    int y = r.y();
+    int h = 0;          //height of this line so far.
+    QPtrListIterator<QLayoutItem> it(list);
+    QLayoutItem *o;
+    while ( (o=it.current()) != 0 ) {
+        ++it;
+        int nextX = x + o->sizeHint().width() + spacing();
+        if ( nextX - spacing() > r.right() && h > 0 ) {
+            x = r.x();
+            y = y + h + spacing();
+            nextX = x + o->sizeHint().width() + spacing();
+            h = 0;
+        }
+        if ( !testonly )
+            o->setGeometry( QRect( QPoint( x, y ), o->sizeHint() ) );
+        x = nextX;
+        h = QMAX( h,  o->sizeHint().height() );
+    }
+    return y + h - r.y();
+}
+
+QSize SimpleFlow::minimumSize() const
+{
+    QSize s(0,0);
+    QPtrListIterator<QLayoutItem> it(list);
+    QLayoutItem *o;
+    while ( (o=it.current()) != 0 ) {
+        ++it;
+        s = s.expandedTo( o->minimumSize() );
+    }
+    return s;
+}
+

+ +

Header file of the border layout: +

/****************************************************************************
+** $Id: qt/border.h   3.3.8   edited Jan 11 14:46 $
+**
+** Definition of simple flow layout for custom layout example
+**
+** Created : 979899
+**
+** Copyright (C) 1997-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef BORDER_H
+#define BORDER_H
+
+#include <qlayout.h>
+#include <qptrlist.h>
+
+class BorderWidgetItem : public QWidgetItem
+{
+public:
+    BorderWidgetItem( QWidget *w )
+        : QWidgetItem( w )
+    {}
+
+    void setGeometry( const QRect &r )
+    { widget()->setGeometry( r ); }
+
+};
+
+class BorderLayout : public QLayout
+{
+public:
+    enum Position {
+        West = 0,
+        North,
+        South,
+        East,
+        Center
+    };
+
+    struct BorderLayoutStruct
+    {
+        BorderLayoutStruct( QLayoutItem *i, Position p ) {
+            item = i;
+            pos = p;
+        }
+
+        QLayoutItem *item;
+        Position pos;
+    };
+
+    enum SizeType {
+        Minimum = 0,
+        SizeHint
+    };
+
+    BorderLayout( QWidget *parent, int border = 0, int autoBorder = -1,
+                  const char *name = 0 )
+        : QLayout( parent, border, autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ),
+          sizeDirty( TRUE ), msizeDirty( TRUE )
+    {}
+
+    BorderLayout( QLayout* parent, int autoBorder = -1, const char *name = 0 )
+        : QLayout( parent, autoBorder, name  ), cached( 0, 0 ), mcached( 0, 0 ),
+          sizeDirty( TRUE ), msizeDirty( TRUE )
+    {}
+
+    BorderLayout( int autoBorder = -1, const char *name = 0 )
+        : QLayout( autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ),
+          sizeDirty( TRUE ), msizeDirty( TRUE )
+    {}
+
+    ~BorderLayout();
+
+    void addItem( QLayoutItem *item );
+
+    void addWidget( QWidget *widget, Position pos );
+    void add( QLayoutItem *item, Position pos );
+
+    bool hasHeightForWidth() const;
+
+    QSize sizeHint() const;
+    QSize minimumSize() const;
+
+    QLayoutIterator iterator();
+
+    QSizePolicy::ExpandData expanding() const;
+
+protected:
+    void setGeometry( const QRect &rect );
+
+private:
+    void doLayout( const QRect &rect, bool testonly = FALSE );
+    void calcSize( SizeType st );
+
+    QPtrList<BorderLayoutStruct> list;
+    QSize cached, mcached;
+    bool sizeDirty, msizeDirty;
+
+};
+
+#endif
+

+ +

Implementation of the border layout: +

/****************************************************************************
+** $Id: qt/border.cpp   3.3.8   edited Jan 11 14:46 $
+**
+** Implementing your own layout: flow example
+**
+** Copyright (C) 1996-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "border.h"
+
+class BorderLayoutIterator : public QGLayoutIterator
+{
+public:
+    BorderLayoutIterator( const QPtrList<BorderLayout::BorderLayoutStruct> *l )
+        : idx( 0 ) , list( (QPtrList<BorderLayout::BorderLayoutStruct>*)l )
+    {}
+
+    uint count() const;
+    QLayoutItem *current();
+    BorderLayout::BorderLayoutStruct *currentStruct();
+    void toFirst();
+    QLayoutItem *next();
+    QLayoutItem *takeCurrent();
+    BorderLayoutIterator &operator++();
+
+private:
+    int idx;
+    QPtrList<BorderLayout::BorderLayoutStruct> *list;
+
+};
+
+uint BorderLayoutIterator::count() const
+{
+    return list->count();
+}
+
+QLayoutItem *BorderLayoutIterator::current()
+{
+    return idx < (int)count() ? list->at( idx )->item : 0;
+}
+
+BorderLayout::BorderLayoutStruct *BorderLayoutIterator::currentStruct()
+{
+    return idx < (int)count() ? list->at( idx ) : 0;
+}
+
+void BorderLayoutIterator::toFirst()
+{
+    idx = 0;
+}
+
+QLayoutItem *BorderLayoutIterator::next()
+{
+    idx++;
+    return current();
+}
+
+QLayoutItem *BorderLayoutIterator::takeCurrent()
+{
+    BorderLayout::BorderLayoutStruct *b
+        = idx < int( list->count() ) ? list->take(  idx  ) : 0;
+    QLayoutItem *item =  b ? b->item : 0;
+    delete b;
+    return item;
+}
+
+BorderLayoutIterator &BorderLayoutIterator::operator++()
+{
+    next();
+    return *this;
+}
+
+BorderLayout::~BorderLayout()
+{
+    deleteAllItems();
+}
+
+
+void BorderLayout::addItem( QLayoutItem *item )
+{
+    add( item, West );
+}
+
+void BorderLayout::addWidget( QWidget *widget, Position pos )
+{
+    add( new BorderWidgetItem( widget ), pos );
+}
+
+void BorderLayout::add( QLayoutItem *item, Position pos )
+{
+    list.append( new BorderLayoutStruct( item, pos ) );
+    sizeDirty = TRUE; msizeDirty = TRUE;
+    calcSize( SizeHint ); calcSize( Minimum );
+}
+
+bool BorderLayout::hasHeightForWidth() const
+{
+    return FALSE;
+}
+
+QSize BorderLayout::sizeHint() const
+{
+    return cached;
+}
+
+QSize BorderLayout::minimumSize() const
+{
+    return cached;
+}
+
+QSizePolicy::ExpandData BorderLayout::expanding() const
+
+{
+    return QSizePolicy::BothDirections;
+}
+
+QLayoutIterator BorderLayout::iterator()
+{
+    return QLayoutIterator( new BorderLayoutIterator( &list ) );
+}
+
+void BorderLayout::setGeometry( const QRect &rct )
+{
+    QLayout::setGeometry( rct );
+    doLayout( rct );
+}
+
+void BorderLayout::doLayout( const QRect &rct, bool /*testonly*/ )
+{
+    int ew = 0, ww = 0, nh = 0, sh = 0;
+    int h = 0;
+
+    BorderLayoutIterator it( &list );
+    BorderLayoutStruct *o;
+    BorderLayoutStruct *center = 0;
+    while ( ( o = it.currentStruct() ) != 0 ) {
+        ++it;
+
+        if ( o->pos == North ) {
+            o->item->setGeometry( QRect( rct.x(), nh, rct.width(), o->item->sizeHint().height() ) );
+            nh += o->item->geometry().height() + spacing();
+        }
+        if ( o->pos == South ) {
+            o->item->setGeometry( QRect( o->item->geometry().x(), o->item->geometry().y(),
+                                         rct.width(), o->item->sizeHint().height() ) );
+            sh += o->item->geometry().height() + spacing();
+            o->item->setGeometry( QRect( rct.x(), rct.y() + rct.height() - sh + spacing(),
+                                         o->item->geometry().width(), o->item->geometry().height() ) );
+        }
+        if ( o->pos == Center )
+            center = o;
+    }
+
+    h = rct.height() - nh - sh;
+
+    it.toFirst();
+    while ( ( o = it.currentStruct() ) != 0 ) {
+        ++it;
+
+        if ( o->pos == West ) {
+            o->item->setGeometry( QRect( rct.x() + ww, nh, o->item->sizeHint().width(), h ) );
+            ww += o->item->geometry().width() + spacing();
+        }
+        if ( o->pos == East ) {
+            o->item->setGeometry( QRect( o->item->geometry().x(), o->item->geometry().y(),
+                                         o->item->sizeHint().width(), h ) );
+            ew += o->item->geometry().width() + spacing();
+            o->item->setGeometry( QRect( rct.x() + rct.width() - ew + spacing(), nh,
+                                         o->item->geometry().width(), o->item->geometry().height() ) );
+        }
+    }
+
+    if ( center )
+        center->item->setGeometry( QRect( ww, nh, rct.width() - ew - ww, h ) );
+}
+
+void BorderLayout::calcSize( SizeType st )
+{
+    if ( ( st == Minimum && !msizeDirty ) ||
+         ( st == SizeHint && !sizeDirty ) )
+        return;
+
+    int w = 0, h = 0;
+
+    BorderLayoutIterator it( &list );
+    BorderLayoutStruct *o;
+    while ( ( o = it.currentStruct() ) != 0 ) {
+        ++it;
+        if ( o->pos == North ||
+             o->pos == South ) {
+            if ( st == Minimum )
+                h += o->item->minimumSize().height();
+            else
+                h += o->item->sizeHint().height();
+        }
+        else if ( o->pos == West ||
+                  o->pos == East ) {
+            if ( st == Minimum )
+                w += o->item->minimumSize().width();
+            else
+                w += o->item->sizeHint().width();
+        } else {
+            if ( st == Minimum ) {
+                h += o->item->minimumSize().height();
+                w += o->item->minimumSize().width();
+            }
+            else {
+                h += o->item->sizeHint().height();
+                w += o->item->sizeHint().width();
+            }
+        }
+    }
+
+    if ( st == Minimum ) {
+        msizeDirty = FALSE;
+        mcached = QSize( w, h );
+    } else {
+        sizeDirty = FALSE;
+        cached = QSize( w, h );
+    }
+
+    return;
+}
+

+ +

Header file of the card layout: +

/****************************************************************************
+** $Id: qt/card.h   3.3.8   edited Jan 11 14:46 $
+**
+** Definition of simple flow layout for custom layout example
+**
+** Created : 979899
+**
+** Copyright (C) 1997-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef CARD_H
+#define CARD_H
+
+#include <qlayout.h>
+#include <qptrlist.h>
+
+class CardLayout : public QLayout
+{
+public:
+    CardLayout( QWidget *parent, int dist )
+        : QLayout( parent, 0, dist ) {}
+    CardLayout( QLayout* parent, int dist)
+        : QLayout( parent, dist ) {}
+    CardLayout( int dist )
+        : QLayout( dist ) {}
+    ~CardLayout();
+
+    void addItem( QLayoutItem *item );
+    QSize sizeHint() const;
+    QSize minimumSize() const;
+    QLayoutIterator iterator();
+    void setGeometry( const QRect &rect );
+
+private:
+    QPtrList<QLayoutItem> list;
+
+};
+
+#endif
+

+ +

Implementation of the card layout: +

/****************************************************************************
+** $Id: qt/card.cpp   3.3.8   edited Jan 11 14:46 $
+**
+** Implementing your own layout: flow example
+**
+** Copyright (C) 1996-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "card.h"
+
+class CardLayoutIterator :public QGLayoutIterator
+{
+public:
+    CardLayoutIterator( QPtrList<QLayoutItem> *l )
+        : idx( 0 ), list( l )  {}
+
+    QLayoutItem *current();
+    QLayoutItem *next();
+    QLayoutItem *takeCurrent();
+
+private:
+    int idx;
+    QPtrList<QLayoutItem> *list;
+};
+
+QLayoutItem *CardLayoutIterator::current()
+{
+    return idx < int( list->count() ) ? list->at( idx ) : 0;
+}
+
+QLayoutItem *CardLayoutIterator::next()
+{
+    idx++; return current();
+}
+
+QLayoutItem *CardLayoutIterator::takeCurrent()
+{
+    return idx < int( list->count() ) ?list->take( idx ) : 0;
+}
+
+
+
+QLayoutIterator CardLayout::iterator()
+{
+    return QLayoutIterator(  new CardLayoutIterator( &list )  );
+}
+
+CardLayout::~CardLayout()
+{
+    deleteAllItems();
+}
+
+void CardLayout::addItem(  QLayoutItem *item  )
+{
+    list.append( item );
+}
+
+void CardLayout::setGeometry( const QRect &rct )
+{
+    QLayout::setGeometry( rct );
+
+    QPtrListIterator<QLayoutItem> it( list );
+    if ( it.count() == 0 )
+        return;
+
+    QLayoutItem *o;
+
+    int i = 0;
+
+    int w = rct.width() - ( list.count() - 1 ) * spacing();
+    int h = rct.height() - ( list.count() - 1 ) * spacing();
+
+    while ( ( o=it.current() ) != 0 ) {
+        ++it;
+        QRect geom( rct.x() + i * spacing(), rct.y() + i * spacing(),
+                    w, h  );
+        o->setGeometry(  geom  );
+        ++i;
+    }
+}
+
+QSize CardLayout::sizeHint() const
+{
+    QSize s(0,0);
+    int n = list.count();
+    if ( n > 0 )
+        s = QSize(100,70); //start with a nice default size
+    QPtrListIterator<QLayoutItem> it(list);
+    QLayoutItem *o;
+    while ( (o=it.current()) != 0 ) {
+        ++it;
+        s = s.expandedTo( o->minimumSize() );
+    }
+    return s + n*QSize(spacing(),spacing());
+}
+
+QSize CardLayout::minimumSize() const
+{
+    QSize s(0,0);
+    int n = list.count();
+    QPtrListIterator<QLayoutItem> it(list);
+    QLayoutItem *o;
+    while ( (o=it.current()) != 0 ) {
+        ++it;
+        s = s.expandedTo( o->minimumSize() );
+    }
+    return s + n*QSize(spacing(),spacing());
+}
+

+ +

Main: +

/****************************************************************************
+** $Id: qt/main.cpp   3.3.8   edited Jan 11 14:46 $
+**
+** Main for custom layout example
+**
+** Copyright (C) 1996-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "flow.h"
+#include "border.h"
+#include "card.h"
+
+#include <qapplication.h>
+#include <qlabel.h>
+#include <qcolor.h>
+#include <qgroupbox.h>
+#include <qpushbutton.h>
+#include <qmultilineedit.h>
+#include <qcolor.h>
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+
+    QWidget *f = new QWidget;
+    QBoxLayout *gm = new QVBoxLayout( f, 5 );
+
+    SimpleFlow *b1 = new SimpleFlow( gm );
+
+    b1->add( new QPushButton( "Short", f ) );
+    b1->add( new QPushButton( "Longer", f ) );
+    b1->add( new QPushButton( "Different text", f ) );
+    b1->add( new QPushButton( "More text", f ) );
+    b1->add( new QPushButton( "Even longer button text", f ) );
+    QPushButton* qb = new QPushButton( "Quit", f );
+    a.connect( qb, SIGNAL( clicked() ), SLOT( quit() ) );
+    b1->add( qb );
+
+    QWidget *wid = new QWidget( f );
+
+    BorderLayout *large = new BorderLayout( wid );
+    large->setSpacing( 5 );
+    large->addWidget( new QPushButton( "North", wid ), BorderLayout::North );
+    large->addWidget( new QPushButton( "West", wid ), BorderLayout::West );
+    QMultiLineEdit* m = new QMultiLineEdit( wid );
+    m->setText( "Central\nWidget" );
+    large->addWidget( m, BorderLayout::Center );
+    QWidget *east1 = new QPushButton( "East", wid );
+    large->addWidget( east1, BorderLayout::East );
+    QWidget *east2 = new QPushButton( "East 2", wid );
+    large->addWidget( east2 , BorderLayout::East );
+    large->addWidget( new QPushButton( "South", wid ), BorderLayout::South );
+    //Left-to-right tab order looks better:
+    QWidget::setTabOrder( east2, east1 );
+    gm->addWidget( wid );
+
+
+    wid = new QWidget( f );
+    CardLayout *card = new CardLayout( wid, 10 );
+
+    QWidget *crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::red );
+    card->add( crd );
+    crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::green );
+    card->add( crd );
+    crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::blue );
+    card->add( crd );
+    crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::white );
+    card->add( crd );
+    crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::black );
+    card->add( crd );
+    crd = new QWidget( wid );
+    crd->setBackgroundColor( Qt::yellow );
+    card->add( crd );
+
+    gm->addWidget( wid );
+
+    QLabel* s = new QLabel( f );
+    s->setText( "outermost box" );
+    s->setFrameStyle( QFrame::Panel | QFrame::Sunken );
+    s->setAlignment( Qt::AlignVCenter | Qt::AlignHCenter );
+    gm->addWidget( s );
+    a.setMainWidget( f );
+    f->setCaption("Qt Example - Custom Layout");
+    f->show();
+
+    int result = a.exec();
+    delete f;
+    return result;
+}
+

+ +