Qt 5.6 | Qt Quick | Scene Graph - OpenGL Under QML | squircle.h Example File

Qt 5.6.2 Reference Documentation

# squircle.h Example File

scenegraph/openglunderqml/squircle.h

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      #ifndef SQUIRCLE_H
      #define SQUIRCLE_H

      #include <QtQuick/QQuickItem>
      #include <QtGui/QOpenGLShaderProgram>
      #include <QtGui/QOpenGLFunctions>

      class SquircleRenderer : public QObject, protected QOpenGLFunctions
      {
          Q_OBJECT
      public:
          SquircleRenderer() : m_t(0), m_program(0) { }
          ~SquircleRenderer();

          void setT(qreal t) { m_t = t; }
          void setViewportSize(const QSize &size) { m_viewportSize = size; }
          void setWindow(QQuickWindow *window) { m_window = window; }

      public slots:
          void paint();

      private:
          QSize m_viewportSize;
          qreal m_t;
          QOpenGLShaderProgram *m_program;
          QQuickWindow *m_window;
      };

      class Squircle : public QQuickItem
      {
          Q_OBJECT
          Q_PROPERTY(qreal t READ t WRITE setT NOTIFY tChanged)

      public:
          Squircle();

          qreal t() const { return m_t; }
          void setT(qreal t);

      signals:
          void tChanged();

      public slots:
          void sync();
          void cleanup();

      private slots:
          void handleWindowChanged(QQuickWindow *win);

      private:
          qreal m_t;
          SquircleRenderer *m_renderer;
      };

      #endif // SQUIRCLE_H