qcontext2dcanvas.h Example File | Qt Script

Qt 5.6 | Qt Script | Context2D Example | qcontext2dcanvas.h Example File

Qt 5.6.2 Reference Documentation

# qcontext2dcanvas.h Example File

script/context2d/qcontext2dcanvas.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:
      **
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      #ifndef QCONTEXT2DCANVAS_H
      #define QCONTEXT2DCANVAS_H

      #include <qscriptengine.h>
      #include <qscriptcontext.h>
      #include <qscriptvalue.h>

      #include <QWidget>

      class QPaintEvent;
      class QResizeEvent;
      class QMouseEvent;
      class QKeyEvent;

      class Environment;
      class Context2D;

      class QContext2DCanvas : public QWidget
      {
          Q_OBJECT
      public:
          QContext2DCanvas(Context2D *context, Environment *env, QWidget *parent = 0);
          ~QContext2DCanvas();

          Context2D *context() const;
          void reset();

      public slots:
          QScriptValue getContext(const QString &str);
          void resize(int width, int height);

          // EventTarget
          void addEventListener(const QString &type, const QScriptValue &listener,
                                bool useCapture);

      protected:
          virtual void paintEvent(QPaintEvent *e);
          virtual void mouseMoveEvent(QMouseEvent *e);
          virtual void mousePressEvent(QMouseEvent *e);
          virtual void mouseReleaseEvent(QMouseEvent *e);
          virtual void keyPressEvent(QKeyEvent *e);
          virtual void keyReleaseEvent(QKeyEvent *e);
          virtual void resizeEvent(QResizeEvent *e);

      private slots:
          void contentsChanged(const QImage &image);

      private:
          Context2D *m_context;
          Environment *m_env;
          QImage m_image;
      };

      #endif