C++/Qt/QMouseEvent — различия между версиями
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Текущая версия на 10:25, 25 мая 2010
Содержание
Check event type
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QCheckBox>
#include <QMouseEvent>
class MyCheckBox : public QCheckBox
{
public:
void mousePressEvent(QMouseEvent *event);
};
void MyCheckBox::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
// handle left mouse button here
} else {
// pass on other buttons to base class
QCheckBox::mousePressEvent(event);
}
}
class MyWidget : public QWidget
{
public:
bool event(QEvent *event);
};
static const int MyCustomEventType = 1099;
class MyCustomEvent : public QEvent
{
public:
MyCustomEvent() : QEvent((QEvent::Type)MyCustomEventType) {}
};
bool MyWidget::event(QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *ke = static_cast<QKeyEvent *>(event);
if (ke->key() == Qt::Key_Tab) {
return true;
}
} else if (event->type() == MyCustomEventType) {
MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event);
return true;
}
return QWidget::event(event);
}
int main()
{
}
Handle QMouseEvent
Foundations of Qt Development\Chapter06\eventlister\eventwidget.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QCloseEvent>
#include <QContextMenuEvent>
#include <QEvent>
#include <QFocusEvent>
#include <QHideEvent>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QPaintEvent>
#include <QResizeEvent>
#include <QShowEvent>
#include <QWheelEvent>
#include "eventwidget.h"
EventWidget::EventWidget( QWidget *parent ) : QWidget( parent )
{
}
void EventWidget::closeEvent( QCloseEvent * event )
{
emit gotEvent( tr("closeEvent") );
}
void EventWidget::enterEvent( QEvent * event )
{
emit gotEvent( tr("enterEvent") );
}
void EventWidget::leaveEvent( QEvent * event )
{
emit gotEvent( tr("leaveEvent") );
}
void EventWidget::hideEvent( QHideEvent * event )
{
emit gotEvent( tr("hideEvent") );
}
void EventWidget::showEvent( QShowEvent * event )
{
emit gotEvent( tr("showEvent") );
}
void EventWidget::paintEvent( QPaintEvent * event )
{
emit gotEvent( tr("paintEvent") );
}
void EventWidget::contextMenuEvent( QContextMenuEvent * event )
{
emit gotEvent( tr("contextMenuEvent( x:%1, y:%2, reason:%3 )")
.arg(event->x())
.arg(event->y())
.arg(event->reason()==2?"Other":
event->reason()==1?"Keyboard":
"Mouse") );
}
void EventWidget::focusInEvent( QFocusEvent * event )
{
emit gotEvent( tr("focusInEvent( reason:%1 )")
.arg( event->reason()==0?"MouseFocusReason":
event->reason()==1?"TabFocusReason":
event->reason()==2?"BacktabFocusReason":
event->reason()==3?"ActiveWindowFocusReason":
event->reason()==4?"PopupFocusReason":
event->reason()==5?"ShortcutFocusReason":
event->reason()==6?"MenuBarFocusReason":
"OtherFocusReason" ) );
}
void EventWidget::focusOutEvent( QFocusEvent * event )
{
emit gotEvent( tr("focusOutEvent( reason:%1 )")
.arg( event->reason()==0?"MouseFocusReason":
event->reason()==1?"TabFocusReason":
event->reason()==2?"BacktabFocusReason":
event->reason()==3?"ActiveWindowFocusReason":
event->reason()==4?"PopupFocusReason":
event->reason()==5?"ShortcutFocusReason":
event->reason()==6?"MenuBarFocusReason":
"OtherFocusReason" ) );
}
void EventWidget::keyPressEvent( QKeyEvent * event )
{
emit gotEvent( tr("keyPressEvent( text:%1, modifiers:%2 )")
.arg( event->text() )
.arg( event->modifiers()==0?tr("NoModifier"):(
(event->modifiers()&Qt::ShiftModifier ==0?tr(""):
tr("ShiftModifier "))+
(event->modifiers()&Qt::ControlModifier ==0?tr(""):
tr("ControlModifier "))+
(event->modifiers()&Qt::AltModifier ==0?tr(""):
tr("AltModifier "))+
(event->modifiers()&Qt::MetaModifier ==0?tr(""):
tr("MetaModifier "))+
(event->modifiers()&Qt::KeypadModifier ==0?tr(""):
tr("KeypadModifier "))+
(event->modifiers()&Qt::GroupSwitchModifier==0?tr(""):
tr("GroupSwitchModifier")) ) ) );
}
void EventWidget::keyReleaseEvent( QKeyEvent * event )
{
emit gotEvent( tr("keyReleaseEvent( text:%1, modifiers:%2 )")
.arg( event->text() )
.arg( event->modifiers()==0?tr("NoModifier"):(
(event->modifiers()&Qt::ShiftModifier ==0?tr(""):
tr("ShiftModifier "))+
(event->modifiers()&Qt::ControlModifier ==0?tr(""):
tr("ControlModifier "))+
(event->modifiers()&Qt::AltModifier ==0?tr(""):
tr("AltModifier "))+
(event->modifiers()&Qt::MetaModifier ==0?tr(""):
tr("MetaModifier "))+
(event->modifiers()&Qt::KeypadModifier ==0?tr(""):
tr("KeypadModifier "))+
(event->modifiers()&Qt::GroupSwitchModifier==0?tr(""):
tr("GroupSwitchModifier")) ) ) );
}
void EventWidget::mouseDoubleClickEvent( QMouseEvent * event )
{
emit gotEvent( tr("mouseDoubleClickEvent( x:%1, y:%2, button:%3 )")
.arg( event->x() )
.arg( event->y() )
.arg( event->button()==Qt::LeftButton? "LeftButton":
event->button()==Qt::RightButton?"RightButton":
event->button()==Qt::MidButton? "MidButton":
event->button()==Qt::XButton1? "XButton1":
"XButton2" ) );
}
void EventWidget::mouseMoveEvent( QMouseEvent * event )
{
emit gotEvent( tr("mouseMoveEvent( x:%1, y:%2, button:%3 )")
.arg( event->x() )
.arg( event->y() )
.arg( event->button()==Qt::LeftButton? "LeftButton":
event->button()==Qt::RightButton?"RightButton":
event->button()==Qt::MidButton? "MidButton":
event->button()==Qt::XButton1? "XButton1":
"XButton2" ) );
}
void EventWidget::mousePressEvent( QMouseEvent * event )
{
emit gotEvent( tr("mousePressEvent( x:%1, y:%2, button:%3 )")
.arg( event->x() )
.arg( event->y() )
.arg( event->button()==Qt::LeftButton? "LeftButton":
event->button()==Qt::RightButton?"RightButton":
event->button()==Qt::MidButton? "MidButton":
event->button()==Qt::XButton1? "XButton1":
"XButton2" ) );
}
void EventWidget::mouseReleaseEvent( QMouseEvent * event )
{
emit gotEvent( tr("mouseReleaseEvent( x:%1, y:%2, button:%3 )")
.arg( event->x() )
.arg( event->y() )
.arg( event->button()==Qt::LeftButton? "LeftButton":
event->button()==Qt::RightButton?"RightButton":
event->button()==Qt::MidButton? "MidButton":
event->button()==Qt::XButton1? "XButton1":
"XButton2" ) );
}
void EventWidget::resizeEvent( QResizeEvent * event )
{
emit gotEvent( tr("resizeEvent( w:%1, h:%2 )")
.arg( event->size().width() )
.arg( event->size().height() ) );
}
void EventWidget::wheelEvent( QWheelEvent * event )
{
emit gotEvent( tr("wheelEvent( x:%1, y:%2, delta:%3, orientation:%4 )")
.arg( event->x() )
.arg( event->y() )
.arg( event->delta() ).arg( event->orientation()==1?
"Horizontal":"Vertical" ) );
}
Foundations of Qt Development\Chapter06\eventlister\eventwidget.h
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef EVENTWIDGET_H
#define EVENTWIDGET_H
#include <QWidget>
class QCloseEvent;
class QContextMenuEvent;
class QEvent;
class QFocusEvent;
class QHideEvent;
class QKeyEvent;
class QMouseEvent;
class QPaintEvent;
class QResizeEvent;
class QShowEvent;
class QWheelEvent;
class EventWidget : public QWidget
{
Q_OBJECT
public:
EventWidget( QWidget *parent = 0 );
signals:
void gotEvent( const QString );
protected:
void closeEvent( QCloseEvent * event );
void contextMenuEvent( QContextMenuEvent * event );
void enterEvent( QEvent * event );
void focusInEvent( QFocusEvent * event );
void focusOutEvent( QFocusEvent * event );
void hideEvent( QHideEvent * event );
void keyPressEvent( QKeyEvent * event );
void keyReleaseEvent( QKeyEvent * event );
void leaveEvent( QEvent * event );
void mouseDoubleClickEvent( QMouseEvent * event );
void mouseMoveEvent( QMouseEvent * event );
void mousePressEvent( QMouseEvent * event );
void mouseReleaseEvent( QMouseEvent * event );
void paintEvent( QPaintEvent * event );
void resizeEvent( QResizeEvent * event );
void showEvent( QShowEvent * event );
void wheelEvent( QWheelEvent * event );
};
#endif // EVENTWIDGET_H
Foundations of Qt Development\Chapter06\eventlister\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QApplication>
#include <QTextEdit>
#include "eventwidget.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QTextEdit log;
EventWidget widget;
QObject::connect( &widget, SIGNAL(gotEvent(QString)), &log, SLOT(append(QString)) );
log.show();
widget.show();
return app.exec();
}
Is mouse left button clicked
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QCheckBox>
#include <QMouseEvent>
class MyCheckBox : public QCheckBox
{
public:
void mousePressEvent(QMouseEvent *event);
};
void MyCheckBox::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
// handle left mouse button here
} else {
// pass on other buttons to base class
QCheckBox::mousePressEvent(event);
}
}
class MyWidget : public QWidget
{
public:
bool event(QEvent *event);
};
static const int MyCustomEventType = 1099;
class MyCustomEvent : public QEvent
{
public:
MyCustomEvent() : QEvent((QEvent::Type)MyCustomEventType) {}
};
bool MyWidget::event(QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *ke = static_cast<QKeyEvent *>(event);
if (ke->key() == Qt::Key_Tab) {
return true;
}
} else if (event->type() == MyCustomEventType) {
MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event);
return true;
}
return QWidget::event(event);
}
int main()
{
}
Qt UI mouse test
Foundations of Qt Development\Chapter16\widgettest\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QtTest>
#include "spinboxtest.h"
QTEST_MAIN(SpinBoxTest)
Foundations of Qt Development\Chapter16\widgettest\spinboxtest.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QtTest>
#include <QSpinBox>
#include "spinboxtest.h"
void SpinBoxTest::testKeys()
{
QSpinBox spinBox;
spinBox.setRange( 1, 10 );
spinBox.setValue( 5 );
QTest::keyClick( &spinBox, Qt::Key_Up );
QCOMPARE( spinBox.value(), 6 );
QTest::keyClick( &spinBox, Qt::Key_Down );
QCOMPARE( spinBox.value(), 5 );
spinBox.setValue( 10 );
QTest::keyClick( &spinBox, Qt::Key_Up );
QCOMPARE( spinBox.value(), 10 );
spinBox.setValue( 1 );
QTest::keyClick( &spinBox, Qt::Key_Down );
QCOMPARE( spinBox.value(), 1 );
}
void SpinBoxTest::testClicks()
{
QSpinBox spinBox;
spinBox.setRange( 1, 10 );
spinBox.setValue( 5 );
QSize size = spinBox.size();
QPoint upButton = QPoint( size.width()-2, 2 );
QPoint downButton = QPoint( size.width()-2, size.height()-2 );
QTest::mouseClick( &spinBox, Qt::LeftButton, 0, upButton );
QCOMPARE( spinBox.value(), 6 );
QTest::mouseClick( &spinBox, Qt::LeftButton, 0, downButton );
QCOMPARE( spinBox.value(), 5 );
spinBox.setValue( 10 );
QTest::mouseClick( &spinBox, Qt::LeftButton, 0, upButton );
QCOMPARE( spinBox.value(), 10 );
spinBox.setValue( 1 );
QTest::mouseClick( &spinBox, Qt::LeftButton, 0, downButton );
QCOMPARE( spinBox.value(), 1 );
}
void SpinBoxTest::testSetting()
{
QSpinBox spinBox;
spinBox.setRange( 1, 10 );
spinBox.setValue( 5 );
QCOMPARE( spinBox.value(), 5 );
spinBox.setValue( 0 );
QCOMPARE( spinBox.value(), 1 );
spinBox.setValue( 11 );
QCOMPARE( spinBox.value(), 10 );
}
Foundations of Qt Development\Chapter16\widgettest\spinboxtest.h
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef SPINBOXTEST_H
#define SPINBOXTEST_H
#include <QObject>
class SpinBoxTest : public QObject
{
Q_OBJECT
private slots:
void testKeys();
void testClicks();
void testSetting();
};
#endif // SPINBOXTEST_H
Scribble area
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SCRIBBLEAREA_H
#define SCRIBBLEAREA_H
#include <QColor>
#include <QImage>
#include <QPoint>
#include <QWidget>
class ScribbleArea : public QWidget
{
Q_OBJECT
public:
ScribbleArea(QWidget *parent = 0);
bool openImage(const QString &fileName);
bool saveImage(const QString &fileName, const char *fileFormat);
void setPenColor(const QColor &newColor);
void setPenWidth(int newWidth);
bool isModified() const { return modified; }
QColor penColor() const { return myPenColor; }
int penWidth() const { return myPenWidth; }
public slots:
void clearImage();
void print();
protected:
void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);
void paintEvent(QPaintEvent *event);
void resizeEvent(QResizeEvent *event);
private:
void drawLineTo(const QPoint &endPoint);
void resizeImage(QImage *image, const QSize &newSize);
bool modified;
bool scribbling;
int myPenWidth;
QColor myPenColor;
QImage image;
QPoint lastPoint;
};
#endif
#include <QtGui>
#include "scribblearea.h"
ScribbleArea::ScribbleArea(QWidget *parent)
: QWidget(parent)
{
setAttribute(Qt::WA_StaticContents);
modified = false;
scribbling = false;
myPenWidth = 1;
myPenColor = Qt::blue;
}
bool ScribbleArea::openImage(const QString &fileName)
{
QImage loadedImage;
if (!loadedImage.load(fileName))
return false;
QSize newSize = loadedImage.size().expandedTo(size());
resizeImage(&loadedImage, newSize);
image = loadedImage;
modified = false;
update();
return true;
}
bool ScribbleArea::saveImage(const QString &fileName, const char *fileFormat)
{
QImage visibleImage = image;
resizeImage(&visibleImage, size());
if (visibleImage.save(fileName, fileFormat)) {
modified = false;
return true;
} else {
return false;
}
}
void ScribbleArea::setPenColor(const QColor &newColor)
{
myPenColor = newColor;
}
void ScribbleArea::setPenWidth(int newWidth)
{
myPenWidth = newWidth;
}
void ScribbleArea::clearImage()
{
image.fill(qRgb(255, 255, 255));
modified = true;
update();
}
void ScribbleArea::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
lastPoint = event->pos();
scribbling = true;
}
}
void ScribbleArea::mouseMoveEvent(QMouseEvent *event)
{
if ((event->buttons() & Qt::LeftButton) && scribbling)
drawLineTo(event->pos());
}
void ScribbleArea::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton && scribbling) {
drawLineTo(event->pos());
scribbling = false;
}
}
void ScribbleArea::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
painter.drawImage(QPoint(0, 0), image);
}
void ScribbleArea::resizeEvent(QResizeEvent *event)
{
if (width() > image.width() || height() > image.height()) {
int newWidth = qMax(width() + 128, image.width());
int newHeight = qMax(height() + 128, image.height());
resizeImage(&image, QSize(newWidth, newHeight));
update();
}
QWidget::resizeEvent(event);
}
void ScribbleArea::drawLineTo(const QPoint &endPoint)
{
QPainter painter(&image);
painter.setPen(QPen(myPenColor, myPenWidth, Qt::SolidLine, Qt::RoundCap,
Qt::RoundJoin));
painter.drawLine(lastPoint, endPoint);
modified = true;
int rad = (myPenWidth / 2) + 2;
update(QRect(lastPoint, endPoint).normalized()
.adjusted(-rad, -rad, +rad, +rad));
lastPoint = endPoint;
}
void ScribbleArea::resizeImage(QImage *image, const QSize &newSize)
{
if (image->size() == newSize)
return;
QImage newImage(newSize, QImage::Format_RGB32);
newImage.fill(qRgb(255, 255, 255));
QPainter painter(&newImage);
painter.drawImage(QPoint(0, 0), *image);
*image = newImage;
}
void ScribbleArea::print()
{
#ifndef QT_NO_PRINTER
QPrinter printer(QPrinter::HighResolution);
QPrintDialog *printDialog = new QPrintDialog(&printer, this);
if (printDialog->exec() == QDialog::Accepted) {
QPainter painter(&printer);
QRect rect = painter.viewport();
QSize size = image.size();
size.scale(rect.size(), Qt::KeepAspectRatio);
painter.setViewport(rect.x(), rect.y(), size.width(), size.height());
painter.setWindow(image.rect());
painter.drawImage(0, 0, image);
}
#endif // QT_NO_PRINTER
}
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QList>
#include <QMainWindow>
class ScribbleArea;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
protected:
void closeEvent(QCloseEvent *event);
private slots:
void open();
void save();
void penColor();
void penWidth();
void about();
private:
void createActions();
void createMenus();
bool maybeSave();
bool saveFile(const QByteArray &fileFormat);
ScribbleArea *scribbleArea;
QMenu *saveAsMenu;
QMenu *fileMenu;
QMenu *optionMenu;
QMenu *helpMenu;
QAction *openAct;
QList<QAction *> saveAsActs;
QAction *exitAct;
QAction *penColorAct;
QAction *penWidthAct;
QAction *printAct;
QAction *clearScreenAct;
QAction *aboutAct;
QAction *aboutQtAct;
};
#endif
#include <QtGui>
#include "mainwindow.h"
#include "scribblearea.h"
MainWindow::MainWindow()
{
scribbleArea = new ScribbleArea;
setCentralWidget(scribbleArea);
createActions();
createMenus();
setWindowTitle(tr("Scribble"));
resize(500, 500);
}
void MainWindow::closeEvent(QCloseEvent *event)
{
if (maybeSave()) {
event->accept();
} else {
event->ignore();
}
}
void MainWindow::open()
{
if (maybeSave()) {
QString fileName = QFileDialog::getOpenFileName(this,
tr("Open File"), QDir::currentPath());
if (!fileName.isEmpty())
scribbleArea->openImage(fileName);
}
}
void MainWindow::save()
{
QAction *action = qobject_cast<QAction *>(sender());
QByteArray fileFormat = action->data().toByteArray();
saveFile(fileFormat);
}
void MainWindow::penColor()
{
QColor newColor = QColorDialog::getColor(scribbleArea->penColor());
if (newColor.isValid())
scribbleArea->setPenColor(newColor);
}
void MainWindow::penWidth()
{
bool ok;
int newWidth = QInputDialog::getInteger(this, tr("Scribble"),
tr("Select pen width:"),
scribbleArea->penWidth(),
1, 50, 1, &ok);
if (ok)
scribbleArea->setPenWidth(newWidth);
}
void MainWindow::about()
{
QMessageBox::about(this, tr("About Scribble"),
tr("<p>The <b>Scribble</b> example shows how to use QMainWindow as the "
"base widget for an application, and how to reimplement some of "
"QWidget"s event handlers to receive the events generated for "
"the application"s widgets:</p><p> We reimplement the mouse event "
"handlers to facilitate drawing, the paint event handler to "
"update the application and the resize event handler to optimize "
"the application"s appearance. In addition we reimplement the "
"close event handler to intercept the close events before "
"terminating the application.</p><p> The example also demonstrates "
"how to use QPainter to draw an image in real time, as well as "
"to repaint widgets.</p>"));
}
void MainWindow::createActions()
{
openAct = new QAction(tr("&Open..."), this);
openAct->setShortcut(tr("Ctrl+O"));
connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
foreach (QByteArray format, QImageWriter::supportedImageFormats()) {
QString text = tr("%1...").arg(QString(format).toUpper());
QAction *action = new QAction(text, this);
action->setData(format);
connect(action, SIGNAL(triggered()), this, SLOT(save()));
saveAsActs.append(action);
}
printAct = new QAction(tr("&Print..."), this);
connect(printAct, SIGNAL(triggered()), scribbleArea, SLOT(print()));
exitAct = new QAction(tr("E&xit"), this);
exitAct->setShortcut(tr("Ctrl+Q"));
connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
penColorAct = new QAction(tr("&Pen Color..."), this);
connect(penColorAct, SIGNAL(triggered()), this, SLOT(penColor()));
penWidthAct = new QAction(tr("Pen &Width..."), this);
connect(penWidthAct, SIGNAL(triggered()), this, SLOT(penWidth()));
clearScreenAct = new QAction(tr("&Clear Screen"), this);
clearScreenAct->setShortcut(tr("Ctrl+L"));
connect(clearScreenAct, SIGNAL(triggered()),
scribbleArea, SLOT(clearImage()));
aboutAct = new QAction(tr("&About"), this);
connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
aboutQtAct = new QAction(tr("About &Qt"), this);
connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
}
void MainWindow::createMenus()
{
saveAsMenu = new QMenu(tr("&Save As"), this);
foreach (QAction *action, saveAsActs)
saveAsMenu->addAction(action);
fileMenu = new QMenu(tr("&File"), this);
fileMenu->addAction(openAct);
fileMenu->addMenu(saveAsMenu);
fileMenu->addAction(printAct);
fileMenu->addSeparator();
fileMenu->addAction(exitAct);
optionMenu = new QMenu(tr("&Options"), this);
optionMenu->addAction(penColorAct);
optionMenu->addAction(penWidthAct);
optionMenu->addSeparator();
optionMenu->addAction(clearScreenAct);
helpMenu = new QMenu(tr("&Help"), this);
helpMenu->addAction(aboutAct);
helpMenu->addAction(aboutQtAct);
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(optionMenu);
menuBar()->addMenu(helpMenu);
}
bool MainWindow::maybeSave()
{
if (scribbleArea->isModified()) {
QMessageBox::StandardButton ret;
ret = QMessageBox::warning(this, tr("Scribble"),
tr("The image has been modified.\n"
"Do you want to save your changes?"),
QMessageBox::Save | QMessageBox::Discard
| QMessageBox::Cancel);
if (ret == QMessageBox::Save) {
return saveFile("png");
} else if (ret == QMessageBox::Cancel) {
return false;
}
}
return true;
}
bool MainWindow::saveFile(const QByteArray &fileFormat)
{
QString initialPath = QDir::currentPath() + "/untitled." + fileFormat;
QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
initialPath,
tr("%1 Files (*.%2);;All Files (*)")
.arg(QString(fileFormat.toUpper()))
.arg(QString(fileFormat)));
if (fileName.isEmpty()) {
return false;
} else {
return scribbleArea->saveImage(fileName, fileFormat);
}
}
#include <QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow window;
window.show();
return app.exec();
}