mandelbrotwidget.h Example File

threads/mandelbrot/mandelbrotwidget.h

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  #ifndef MANDELBROTWIDGET_H
  #define MANDELBROTWIDGET_H

  #include <QPixmap>
  #include <QWidget>
  #include "renderthread.h"

  class MandelbrotWidget : public QWidget
  {
      Q_OBJECT

  public:
      MandelbrotWidget(QWidget *parent = 0);

  protected:
      void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
      void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;
      void keyPressEvent(QKeyEvent *event) Q_DECL_OVERRIDE;
  #ifndef QT_NO_WHEELEVENT
      void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
  #endif
      void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
      void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
      void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;

  private slots:
      void updatePixmap(const QImage &image, double scaleFactor);
      void zoom(double zoomFactor);

  private:
      void scroll(int deltaX, int deltaY);

      RenderThread thread;
      QPixmap pixmap;
      QPoint pixmapOffset;
      QPoint lastDragPos;
      double centerX;
      double centerY;
      double pixmapScale;
      double curScale;
  };

  #endif // MANDELBROTWIDGET_H