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Diffstat (limited to 'src/widgets/tqcheckbox.cpp')
| -rw-r--r-- | src/widgets/tqcheckbox.cpp | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/src/widgets/tqcheckbox.cpp b/src/widgets/tqcheckbox.cpp new file mode 100644 index 000000000..a9cf27d0d --- /dev/null +++ b/src/widgets/tqcheckbox.cpp @@ -0,0 +1,364 @@ +/**************************************************************************** +** +** Implementation of TQCheckBox class +** +** Created : 940222 +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the widgets module of the TQt 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 TQt 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.TQPL +** included in the packaging of this file. Licensees holding valid TQt +** Commercial licenses may use this file in accordance with the TQt +** 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 "tqcheckbox.h" +#ifndef TQT_NO_CHECKBOX +#include "tqpainter.h" +#include "ntqdrawutil.h" +#include "tqpixmap.h" +#include "tqpixmapcache.h" +#include "tqbitmap.h" +#include "tqtextstream.h" +#include "ntqapplication.h" +#include "tqstyle.h" + +/*! + \class TQCheckBox tqcheckbox.h + \brief The TQCheckBox widget provides a checkbox with a text label. + + \ingroup basic + \mainclass + + TQCheckBox and TQRadioButton are both option buttons. That is, they + can be switched on (checked) or off (unchecked). The classes + differ in how the choices for the user are restricted. Radio + buttons define a "one of many" choice, whereas checkboxes provide + "many of many" choices. + + A TQButtonGroup can be used to group check buttons visually. + + Whenever a checkbox is checked or cleared it emits the signal + toggled(). Connect to this signal if you want to trigger an action + each time the checkbox changes state. You can use isChecked() to + query whether or not a checkbox is checked. + + \warning The toggled() signal can not be trusted for tristate + checkboxes. + + In addition to the usual checked and unchecked states, TQCheckBox + optionally provides a third state to indicate "no change". This + is useful whenever you need to give the user the option of neither + checking nor unchecking a checkbox. If you need this third state, + enable it with setTristate() and use state() to query the current + toggle state. When a tristate checkbox changes state, it emits the + stateChanged() signal. + + Just like TQPushButton, a checkbox can display text or a pixmap. + The text can be set in the constructor or with setText(); the + pixmap is set with setPixmap(). + + \important text(), setText(), text(), pixmap(), setPixmap(), + accel(), setAccel(), isToggleButton(), setDown(), isDown(), + isOn(), state(), autoRepeat(), isExclusiveToggle(), group(), + setAutoRepeat(), toggle(), pressed(), released(), clicked(), + toggled(), state() stateChanged() + + <img src=qchkbox-m.png> <img src=qchkbox-w.png> + + \sa TQButton TQRadioButton + \link guibooks.html#fowler Fowler: Check Box \endlink +*/ + +/*! + \property TQCheckBox::checked + \brief whether the checkbox is checked + + The default is unchecked, i.e. FALSE. +*/ + +/*! + \property TQCheckBox::autoMask + \brief whether the checkbox is automatically masked + + \sa TQWidget::setAutoMask() +*/ + +/*! + \property TQCheckBox::tristate + \brief whether the checkbox is a tri-state checkbox + + The default is two-state, i.e. tri-state is FALSE. +*/ + +/*! + Constructs a checkbox with no text. + + The \a parent and \a name arguments are sent to the TQWidget + constructor. +*/ + +TQCheckBox::TQCheckBox( TQWidget *parent, const char *name ) + : TQButton( parent, name, WNoAutoErase | WMouseNoMask ) +{ + setToggleButton( TRUE ); + setSizePolicy( TQSizePolicy( TQSizePolicy::Minimum, TQSizePolicy::Fixed ) ); +} + +/*! + Constructs a checkbox with text \a text. + + The \a parent and \a name arguments are sent to the TQWidget + constructor. +*/ + +TQCheckBox::TQCheckBox( const TQString &text, TQWidget *parent, const char *name ) + : TQButton( parent, name, WNoAutoErase | WMouseNoMask ) +{ + setText( text ); + setToggleButton( TRUE ); + setSizePolicy( TQSizePolicy( TQSizePolicy::Minimum, TQSizePolicy::Fixed ) ); +} + +/*! + Sets the checkbox to the "no change" state. + + \sa setTristate() +*/ +void TQCheckBox::setNoChange() +{ + setTristate(TRUE); + setState( NoChange ); +} + +void TQCheckBox::setTristate(bool y) +{ + setToggleType( y ? Tristate : Toggle ); +} + +bool TQCheckBox::isTristate() const +{ + return toggleType() == Tristate; +} + + +/*!\reimp +*/ +TQSize TQCheckBox::sizeHint() const +{ + // NB: TQRadioButton::sizeHint() is similar + constPolish(); + + TQPainter p(this); + TQSize sz = style().itemRect(&p, TQRect(0, 0, 1, 1), ShowPrefix, FALSE, + pixmap(), text()).size(); + + return (style().sizeFromContents(TQStyle::CT_CheckBox, this, sz). + expandedTo(TQApplication::globalStrut())); +} + + +/*!\reimp +*/ + +void TQCheckBox::drawButton( TQPainter *paint ) +{ + TQPainter *p = paint; + TQRect irect = TQStyle::visualRect( style().subRect(TQStyle::SR_CheckBoxIndicator, this), this ); + const TQColorGroup &cg = colorGroup(); + +#if !defined( TQT_NO_TEXTSTREAM ) && !defined( TQ_WS_MACX ) +# define SAVE_CHECKBOX_PIXMAPS +#endif +#if defined(SAVE_CHECKBOX_PIXMAPS) + TQString pmkey; // pixmap key + int kf = 0; + if ( isDown() ) + kf |= 1; + if ( isEnabled() ) + kf |= 2; + if ( hasFocus() ) + kf |= 4; // active vs. normal colorgroup + if( isActiveWindow() ) + kf |= 8; + if ( hasMouse() ) + kf |= 16; + + kf |= state() << 5; + TQTextOStream os(&pmkey); + os << "$qt_check_" << style().className() << "_" + << palette().serialNumber() << "_" << irect.width() << "x" << irect.height() << "_" << kf; + TQPixmap *pm = TQPixmapCache::find( pmkey ); + if ( pm ) { // pixmap exists + p->drawPixmap( irect.topLeft(), *pm ); + drawButtonLabel( p ); + return; + } + bool use_pm = TRUE; + TQPainter pmpaint; + int wx = 0, wy = 0; + if ( use_pm ) { + pm = new TQPixmap( irect.size() ); // create new pixmap + TQ_CHECK_PTR( pm ); + pm->fill( cg.background() ); + TQPainter::redirect(this, pm); + pmpaint.begin(this); + p = &pmpaint; // draw in pixmap + wx = irect.x(); // save x,y coords + wy = irect.y(); + irect.moveTopLeft(TQPoint(0, 0)); + p->setBackgroundColor( cg.background() ); + } +#endif + + TQStyle::SFlags flags = TQStyle::Style_Default; + if ( isEnabled() ) + flags |= TQStyle::Style_Enabled; + if ( hasFocus() ) + flags |= TQStyle::Style_HasFocus; + if ( isDown() ) + flags |= TQStyle::Style_Down; + if ( hasMouse() ) + flags |= TQStyle::Style_MouseOver; + if ( state() == TQButton::On ) + flags |= TQStyle::Style_On; + else if ( state() == TQButton::Off ) + flags |= TQStyle::Style_Off; + else if ( state() == TQButton::NoChange ) + flags |= TQStyle::Style_NoChange; + + style().drawControl(TQStyle::CE_CheckBox, p, this, irect, cg, flags); + +#if defined(SAVE_CHECKBOX_PIXMAPS) + if ( use_pm ) { + pmpaint.end(); + TQPainter::redirect( this, 0 ); + if ( backgroundPixmap() || backgroundMode() == X11ParentRelative ) { + TQBitmap bm( pm->size() ); + bm.fill( color0 ); + pmpaint.begin( &bm ); + style().drawControlMask(TQStyle::CE_CheckBox, &pmpaint, this, irect); + pmpaint.end(); + pm->setMask( bm ); + } + p = paint; // draw in default device + p->drawPixmap( wx, wy, *pm ); + if (!TQPixmapCache::insert(pmkey, pm) ) // save in cache + delete pm; + } +#endif + + drawButtonLabel( paint ); +} + + +/*!\reimp +*/ +void TQCheckBox::drawButtonLabel( TQPainter *p ) +{ + TQRect r = + TQStyle::visualRect( style().subRect(TQStyle::SR_CheckBoxContents, this), this ); + + TQStyle::SFlags flags = TQStyle::Style_Default; + if (isEnabled()) + flags |= TQStyle::Style_Enabled; + if (hasFocus()) + flags |= TQStyle::Style_HasFocus; + if (isDown()) + flags |= TQStyle::Style_Down; + if (state() == TQButton::On) + flags |= TQStyle::Style_On; + else if (state() == TQButton::Off) + flags |= TQStyle::Style_Off; + else if (state() == TQButton::NoChange) + flags |= TQStyle::Style_NoChange; + + style().drawControl(TQStyle::CE_CheckBoxLabel, p, this, r, colorGroup(), flags); +} + +/*! + \reimp +*/ +void TQCheckBox::resizeEvent( TQResizeEvent *e ) +{ + TQButton::resizeEvent(e); + if ( isVisible() ) { + TQPainter p(this); + TQSize isz = style().itemRect(&p, TQRect(0, 0, 1, 1), ShowPrefix, FALSE, + pixmap(), text()).size(); + TQSize wsz = (style().sizeFromContents(TQStyle::CT_CheckBox, this, isz). + expandedTo(TQApplication::globalStrut())); + + update(wsz.width(), isz.width(), 0, wsz.height()); + } + if (autoMask()) + updateMask(); +} + +/*! + \reimp +*/ +void TQCheckBox::updateMask() +{ + TQRect irect = + TQStyle::visualRect( style().subRect(TQStyle::SR_CheckBoxIndicator, this), this ); + + TQBitmap bm(width(), height()); + bm.fill(color0); + + TQPainter p( &bm, this ); + style().drawControlMask(TQStyle::CE_CheckBox, &p, this, irect); + if ( ! text().isNull() || ( pixmap() && ! pixmap()->isNull() ) ) { + TQRect crect = + TQStyle::visualRect( style().subRect( TQStyle::SR_CheckBoxContents, + this ), this ); + TQRect frect = + TQStyle::visualRect( style().subRect( TQStyle::SR_CheckBoxFocusRect, + this ), this ); + TQRect label(crect.unite(frect)); + p.fillRect(label, color1); + } + p.end(); + + setMask(bm); +} + +/*!\reimp*/ +bool TQCheckBox::hitButton( const TQPoint &pos ) const +{ + TQRect r = TQStyle::visualRect( style().subRect( TQStyle::SR_CheckBoxFocusRect, this ), this ); + if ( tqApp->reverseLayout() ) { + r.setRight( width() ); + } else { + r.setLeft( 0 ); + } + return r.contains( pos ); +} + +#endif |