Qt Reference Documentation

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# canvas.h Example File

graphicsview/portedcanvas/canvas.h

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "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 The Qt Company Ltd 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,
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     ** 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."
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     #ifndef EXAMPLE_H
     #define EXAMPLE_H

     #include <QMenu>
     #include <QMainWindow>
     #include <QMouseEvent>
     #include <QGraphicsView>
     #include <QGraphicsScene>
     #include <QGraphicsItem>

     class BouncyLogo : public QGraphicsPixmapItem {
         void initSpeed();
     public:
         BouncyLogo();
         void advance(int);
         int type() const;

         QPainterPath shape() const;

         void initPos();
     private:
         qreal xvel;
         qreal yvel;
     };

     class FigureEditor : public QGraphicsView {
         Q_OBJECT

     public:
         FigureEditor(QGraphicsScene&, QWidget* parent=0, const char* name=0, Qt::WindowFlags f=0);
         void clear();

     signals:
         void status(const QString&);
     };

     class Main : public QMainWindow {
         Q_OBJECT

     public:
         Main(QGraphicsScene&, QWidget* parent=0, Qt::WindowFlags f=0);
         ~Main();

     public slots:
         void help();

     private slots:
         void aboutQt();
         void newView();
         void clear();
         void init();

         void addSprite();
         void addCircle();
         void addHexagon();
         void addPolygon();
         void addSpline();
         void addText();
         void addLine();
         void addRectangle();
         void addMesh();
         void addLogo();
         void addButterfly();

         void enlarge();
         void shrink();
         void rotateClockwise();
         void rotateCounterClockwise();
         void zoomIn();
         void zoomOut();
         void mirror();
         void moveL();
         void moveR();
         void moveU();
         void moveD();

         void print();

     private:
         QGraphicsScene& canvas;
         FigureEditor *editor;

         QMenu* options;
     #if !defined(Q_OS_SYMBIAN)
         QPrinter* printer;
     #endif
     };

     #endif