C++/Qt/QMouseEvent — различия между версиями
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Текущая версия на 13:25, 25 мая 2010
Содержание
Check event type
<source lang="cpp"> /****************************************************************************
- 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() { }
</source>
Handle QMouseEvent
<source lang="cpp"> 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();
}
</source>
Is mouse left button clicked
<source lang="cpp"> /****************************************************************************
- 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() { }
</source>
Qt UI mouse test
<source lang="cpp">
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
</source>
Scribble area
<source lang="cpp"> /****************************************************************************
- 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("The Scribble 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:
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.The example also demonstrates "
"how to use QPainter to draw an image in real time, as well as ""to repaint widgets."));
}
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();
}
</source>
