C++/Qt/Draw Shape
Содержание
Draw line
/****************************************************************************
**
** 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 <QtGui>
class MyWidget : public QWidget
{
public:
MyWidget();
protected:
void paintEvent(QPaintEvent *);
};
MyWidget::MyWidget()
{
QPalette palette(MyWidget::palette());
palette.setColor(backgroundRole(), Qt::white);
setPalette(palette);
}
void MyWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.setPen(Qt::darkGreen);
painter.drawRect(1, 2, 6, 4);
painter.setPen(Qt::darkGray);
painter.drawLine(2, 8, 6, 2);
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyWidget widget;
widget.show();
return app.exec();
}
Draw lines
Foundations of Qt Development\Chapter07\drawlines\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 <QApplication>
#include <QPixmap>
#include <QPainter>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QPixmap pixmap( 200, 100 );
pixmap.fill( Qt::white );
QPainter painter( &pixmap );
painter.setPen( Qt::black );
QVector<QPoint> polyPoints;
polyPoints << QPoint( 60, 10 ) << QPoint( 80, 90 ) << QPoint( 75, 10 ) << QPoint( 110, 90 );
QVector<QPoint> linePoints;
foreach( QPoint point, polyPoints )
linePoints << point + QPoint( 80, 0 );
painter.drawLine( QPoint( 10, 10 ), QPoint( 30, 90 ) );
painter.drawPolyline( polyPoints );
painter.drawLines( linePoints );
pixmap.save( "drawlines.png" );
return 0;
}
Draw polylines
Foundations of Qt Development\Chapter07\drawlines\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 <QApplication>
#include <QPixmap>
#include <QPainter>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QPixmap pixmap( 200, 100 );
pixmap.fill( Qt::white );
QPainter painter( &pixmap );
painter.setPen( Qt::black );
QVector<QPoint> polyPoints;
polyPoints << QPoint( 60, 10 ) << QPoint( 80, 90 ) << QPoint( 75, 10 ) << QPoint( 110, 90 );
QVector<QPoint> linePoints;
foreach( QPoint point, polyPoints )
linePoints << point + QPoint( 80, 0 );
painter.drawLine( QPoint( 10, 10 ), QPoint( 30, 90 ) );
painter.drawPolyline( polyPoints );
painter.drawLines( linePoints );
pixmap.save( "drawlines.png" );
return 0;
}
Draw rectangle
/****************************************************************************
**
** 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 <QtGui>
class MyWidget : public QWidget
{
public:
MyWidget();
protected:
void paintEvent(QPaintEvent *);
};
MyWidget::MyWidget()
{
QPalette palette(MyWidget::palette());
palette.setColor(backgroundRole(), Qt::white);
setPalette(palette);
}
void MyWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.setPen(Qt::darkGreen);
painter.drawRect(1, 2, 6, 4);
painter.setPen(Qt::darkGray);
painter.drawLine(2, 8, 6, 2);
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyWidget widget;
widget.show();
return app.exec();
}
Draw round rectangle
Foundations of Qt Development\Chapter07\rects\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 <QApplication>
#include <QPixmap>
#include <QPainter>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QPixmap pixmap( 200, 100 );
pixmap.fill( Qt::white );
QPainter painter( &pixmap );
painter.setPen( Qt::black );
painter.drawRect( 10, 10, 85, 35 );
painter.drawRoundRect( 10, 55, 85, 35 );
QRect rect( 105, 10, 85, 35 );
painter.drawRoundRect( rect );
painter.drawRect( rect.translated( 0, 45 ) );
pixmap.save( "rects.png" );
return 0;
}
QPolygon demo
/****************************************************************************
**
** 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 <QtGui>
int main()
{
{
QPolygon polygon;
polygon << QPoint(10, 20) << QPoint(20, 30);
}
{
QPolygonF polygon;
polygon << QPointF(10.4, 20.5) << QPointF(20.2, 30.2);
}
{
static const int points[] = { 10, 20, 30, 40 };
QPolygon polygon;
polygon.setPoints(2, points);
}
{
QPolygon polygon;
polygon.setPoints(2, 10, 20, 30, 40);
}
{
QPolygon polygon(1);
polygon[0] = QPoint(4, 5);
polygon.putPoints(1, 2, 6,7, 8,9);
}
{
QPolygon polygon(3);
polygon.putPoints(0, 3, 4,5, 0,0, 8,9);
polygon.putPoints(1, 1, 6,7);
}
{
QPolygon polygon1;
polygon1.putPoints(0, 3, 1,2, 0,0, 5,6);
// polygon1 is now the three-point polygon(1,2, 0,0, 5,6);
QPolygon polygon2;
polygon2.putPoints(0, 3, 4,4, 5,5, 6,6);
// polygon2 is now (4,4, 5,5, 6,6);
polygon1.putPoints(2, 3, polygon2);
// polygon1 is now the five-point polygon(1,2, 0,0, 4,4, 5,5, 6,6);
}
return 0;
}
Shaped clock
/****************************************************************************
**
** 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 SHAPEDCLOCK_H
#define SHAPEDCLOCK_H
#include <QWidget>
class ShapedClock : public QWidget
{
Q_OBJECT
public:
ShapedClock(QWidget *parent = 0);
QSize sizeHint() const;
protected:
void mouseMoveEvent(QMouseEvent *event);
void mousePressEvent(QMouseEvent *event);
void paintEvent(QPaintEvent *event);
void resizeEvent(QResizeEvent *event);
private:
QPoint dragPosition;
};
#endif
#include <QtGui>
#include "shapedclock.h"
ShapedClock::ShapedClock(QWidget *parent)
: QWidget(parent, Qt::FramelessWindowHint | Qt::WindowSystemMenuHint)
{
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(1000);
QAction *quitAction = new QAction(tr("E&xit"), this);
quitAction->setShortcut(tr("Ctrl+Q"));
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
addAction(quitAction);
setContextMenuPolicy(Qt::ActionsContextMenu);
setToolTip(tr("Drag the clock with the left mouse button.\n"
"Use the right mouse button to open a context menu."));
setWindowTitle(tr("Shaped Analog Clock"));
}
void ShapedClock::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
dragPosition = event->globalPos() - frameGeometry().topLeft();
event->accept();
}
}
void ShapedClock::mouseMoveEvent(QMouseEvent *event)
{
if (event->buttons() & Qt::LeftButton) {
move(event->globalPos() - dragPosition);
event->accept();
}
}
void ShapedClock::paintEvent(QPaintEvent *)
{
static const QPoint hourHand[3] = {
QPoint(7, 8),
QPoint(-7, 8),
QPoint(0, -40)
};
static const QPoint minuteHand[3] = {
QPoint(7, 8),
QPoint(-7, 8),
QPoint(0, -70)
};
QColor hourColor(127, 0, 127);
QColor minuteColor(0, 127, 127, 191);
int side = qMin(width(), height());
QTime time = QTime::currentTime();
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
painter.scale(side / 200.0, side / 200.0);
painter.setPen(Qt::NoPen);
painter.setBrush(hourColor);
painter.save();
painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
painter.drawConvexPolygon(hourHand, 3);
painter.restore();
painter.setPen(hourColor);
for (int i = 0; i < 12; ++i) {
painter.drawLine(88, 0, 96, 0);
painter.rotate(30.0);
}
painter.setPen(Qt::NoPen);
painter.setBrush(minuteColor);
painter.save();
painter.rotate(6.0 * (time.minute() + time.second() / 60.0));
painter.drawConvexPolygon(minuteHand, 3);
painter.restore();
painter.setPen(minuteColor);
for (int j = 0; j < 60; ++j) {
if ((j % 5) != 0)
painter.drawLine(92, 0, 96, 0);
painter.rotate(6.0);
}
}
void ShapedClock::resizeEvent(QResizeEvent * /* event */)
{
int side = qMin(width(), height());
QRegion maskedRegion(width() / 2 - side / 2, height() / 2 - side / 2, side,
side, QRegion::Ellipse);
setMask(maskedRegion);
}
QSize ShapedClock::sizeHint() const
{
return QSize(100, 100);
}
#include <QApplication>
#include "shapedclock.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
ShapedClock clock;
clock.show();
return app.exec();
}
Shape item widget
/****************************************************************************
**
** 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 SHAPEITEM_H
#define SHAPEITEM_H
#include <QColor>
#include <QPainterPath>
#include <QPoint>
class ShapeItem
{
public:
void setPath(const QPainterPath &path);
void setToolTip(const QString &toolTip);
void setPosition(const QPoint &position);
void setColor(const QColor &color);
QPainterPath path() const;
QPoint position() const;
QColor color() const;
QString toolTip() const;
private:
QPainterPath myPath;
QPoint myPosition;
QColor myColor;
QString myToolTip;
};
#endif
#include <QtGui>
#include "shapeitem.h"
QPainterPath ShapeItem::path() const
{
return myPath;
}
QPoint ShapeItem::position() const
{
return myPosition;
}
QColor ShapeItem::color() const
{
return myColor;
}
QString ShapeItem::toolTip() const
{
return myToolTip;
}
void ShapeItem::setPath(const QPainterPath &path)
{
myPath = path;
}
void ShapeItem::setToolTip(const QString &toolTip)
{
myToolTip = toolTip;
}
void ShapeItem::setPosition(const QPoint &position)
{
myPosition = position;
}
void ShapeItem::setColor(const QColor &color)
{
myColor = color;
}
#ifndef SORTINGBOX_H
#define SORTINGBOX_H
#include <QWidget>
#include "shapeitem.h"
QT_BEGIN_NAMESPACE
class QAction;
class QPoint;
class QToolButton;
QT_END_NAMESPACE
class SortingBox : public QWidget
{
Q_OBJECT
public:
SortingBox();
protected:
bool event(QEvent *event);
void resizeEvent(QResizeEvent *event);
void paintEvent(QPaintEvent *event);
void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);
private slots:
void createNewCircle();
void createNewSquare();
void createNewTriangle();
private:
int updateButtonGeometry(QToolButton *button, int x, int y);
void createShapeItem(const QPainterPath &path, const QString &toolTip,
const QPoint &pos, const QColor &color);
int itemAt(const QPoint &pos);
void moveItemTo(const QPoint &pos);
QPoint initialItemPosition(const QPainterPath &path);
QPoint randomItemPosition();
QColor initialItemColor();
QColor randomItemColor();
QToolButton *createToolButton(const QString &toolTip, const QIcon &icon,
const char *member);
QList<ShapeItem> shapeItems;
QPainterPath circlePath;
QPainterPath squarePath;
QPainterPath trianglePath;
QPoint previousPosition;
ShapeItem *itemInMotion;
QToolButton *newCircleButton;
QToolButton *newSquareButton;
QToolButton *newTriangleButton;
};
#endif
#include <QtGui>
#include <stdlib.h>
#include "sortingbox.h"
SortingBox::SortingBox()
{
setMouseTracking(true);
setBackgroundRole(QPalette::Base);
itemInMotion = 0;
newCircleButton = createToolButton(tr("New Circle"),
QIcon(":/images/circle.png"),
SLOT(createNewCircle()));
newSquareButton = createToolButton(tr("New Square"),
QIcon(":/images/square.png"),
SLOT(createNewSquare()));
newTriangleButton = createToolButton(tr("New Triangle"),
QIcon(":/images/triangle.png"),
SLOT(createNewTriangle()));
circlePath.addEllipse(QRect(0, 0, 100, 100));
squarePath.addRect(QRect(0, 0, 100, 100));
qreal x = trianglePath.currentPosition().x();
qreal y = trianglePath.currentPosition().y();
trianglePath.moveTo(x + 120 / 2, y);
trianglePath.lineTo(0, 100);
trianglePath.lineTo(120, 100);
trianglePath.lineTo(x + 120 / 2, y);
setWindowTitle(tr("Tool Tips"));
resize(500, 300);
createShapeItem(circlePath, tr("Circle"), initialItemPosition(circlePath),
initialItemColor());
createShapeItem(squarePath, tr("Square"), initialItemPosition(squarePath),
initialItemColor());
createShapeItem(trianglePath, tr("Triangle"),
initialItemPosition(trianglePath), initialItemColor());
}
bool SortingBox::event(QEvent *event)
{
if (event->type() == QEvent::ToolTip) {
QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
int index = itemAt(helpEvent->pos());
if (index != -1) {
QToolTip::showText(helpEvent->globalPos(), shapeItems[index].toolTip());
} else {
QToolTip::hideText();
event->ignore();
}
return true;
}
return QWidget::event(event);
}
void SortingBox::resizeEvent(QResizeEvent * /* event */)
{
int margin = style()->pixelMetric(QStyle::PM_DefaultTopLevelMargin);
int x = width() - margin;
int y = height() - margin;
y = updateButtonGeometry(newCircleButton, x, y);
y = updateButtonGeometry(newSquareButton, x, y);
updateButtonGeometry(newTriangleButton, x, y);
}
void SortingBox::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
foreach (ShapeItem shapeItem, shapeItems) {
painter.translate(shapeItem.position());
painter.setBrush(shapeItem.color());
painter.drawPath(shapeItem.path());
painter.translate(-shapeItem.position());
}
}
void SortingBox::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
int index = itemAt(event->pos());
if (index != -1) {
itemInMotion = &shapeItems[index];
previousPosition = event->pos();
shapeItems.move(index, shapeItems.size() - 1);
update();
}
}
}
void SortingBox::mouseMoveEvent(QMouseEvent *event)
{
if ((event->buttons() & Qt::LeftButton) && itemInMotion)
moveItemTo(event->pos());
}
void SortingBox::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton && itemInMotion) {
moveItemTo(event->pos());
itemInMotion = 0;
}
}
void SortingBox::createNewCircle()
{
static int count = 1;
createShapeItem(circlePath, tr("Circle <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
void SortingBox::createNewSquare()
{
static int count = 1;
createShapeItem(squarePath, tr("Square <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
void SortingBox::createNewTriangle()
{
static int count = 1;
createShapeItem(trianglePath, tr("Triangle <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
int SortingBox::itemAt(const QPoint &pos)
{
for (int i = shapeItems.size() - 1; i >= 0; --i) {
const ShapeItem &item = shapeItems[i];
if (item.path().contains(pos - item.position()))
return i;
}
return -1;
}
void SortingBox::moveItemTo(const QPoint &pos)
{
QPoint offset = pos - previousPosition;
itemInMotion->setPosition(itemInMotion->position() + offset);
previousPosition = pos;
update();
}
int SortingBox::updateButtonGeometry(QToolButton *button, int x, int y)
{
QSize size = button->sizeHint();
button->setGeometry(x - size.rwidth(), y - size.rheight(),
size.rwidth(), size.rheight());
return y - size.rheight()
- style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing);
}
void SortingBox::createShapeItem(const QPainterPath &path,
const QString &toolTip, const QPoint &pos,
const QColor &color)
{
ShapeItem shapeItem;
shapeItem.setPath(path);
shapeItem.setToolTip(toolTip);
shapeItem.setPosition(pos);
shapeItem.setColor(color);
shapeItems.append(shapeItem);
update();
}
QToolButton *SortingBox::createToolButton(const QString &toolTip,
const QIcon &icon, const char *member)
{
QToolButton *button = new QToolButton(this);
button->setToolTip(toolTip);
button->setIcon(icon);
button->setIconSize(QSize(32, 32));
connect(button, SIGNAL(clicked()), this, member);
return button;
}
QPoint SortingBox::initialItemPosition(const QPainterPath &path)
{
int x;
int y = (height() - (int)path.controlPointRect().height()) / 2;
if (shapeItems.size() == 0)
x = ((3 * width()) / 2 - (int)path.controlPointRect().width()) / 2;
else
x = (width() / shapeItems.size()
- (int)path.controlPointRect().width()) / 2;
return QPoint(x, y);
}
QPoint SortingBox::randomItemPosition()
{
return QPoint(qrand() % (width() - 120), qrand() % (height() - 120));
}
QColor SortingBox::initialItemColor()
{
return QColor::fromHsv(((shapeItems.size() + 1) * 85) % 256, 255, 190);
}
QColor SortingBox::randomItemColor()
{
return QColor::fromHsv(qrand() % 256, 255, 190);
}
#include <QtGui>
#include "sortingbox.h"
int main(int argc, char *argv[])
{
Q_INIT_RESOURCE(tooltips);
QApplication app(argc, argv);
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
SortingBox sortingBox;
sortingBox.show();
return app.exec();
}