static/source/qt5-mandelbrot/mandelbrotwidget.h

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  50
  51 #pragma once
  52
  53 #include <QtGui/QPixmap>
  54 #include <QtWidgets/QWidget>
  55
  56 #include "renderthread.h"
  57
  58 class MandelbrotWidget : public QWidget
  59 {
  60     Q_OBJECT
  61
  62 public:
  63     MandelbrotWidget(QWidget* parent = nullptr);
  64
  65 protected:
  66     void paintEvent(QPaintEvent* event) override;
  67     void resizeEvent(QResizeEvent* event) override;
  68     void keyPressEvent(QKeyEvent* event) override;
  69 #if QT_CONFIG(wheelevent)
  70     void wheelEvent(QWheelEvent* event) override;
  71 #endif
  72     void mousePressEvent(QMouseEvent* event) override;
  73     void mouseMoveEvent(QMouseEvent* event) override;
  74     void mouseReleaseEvent(QMouseEvent* event) override;
  75
  76 private slots:
  77     void updatePixmap(const QImage& image, double scaleFactor);
  78     void zoom(double zoomFactor);
  79
  80 private:
  81     void scroll(int deltaX, int deltaY);
  82
  83     RenderThread thread;
  84     QPixmap pixmap;
  85     QPoint pixmapOffset;
  86     QPoint lastDragPos;
  87     double centerX;
  88     double centerY;
  89     double pixmapScale;
  90     double curScale;
  91 };