C++/Qt/Draw Shape

Материал из C\C++ эксперт
Перейти к: навигация, поиск

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();
}