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renderarea.h Example File

painting/transformations/renderarea.h
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 #ifndef RENDERAREA_H
 #define RENDERAREA_H

 #include <QFont>
 #include <QList>
 #include <QPainterPath>
 #include <QRect>
 #include <QWidget>

 class QPaintEvent;

 enum Operation { NoTransformation, Translate, Rotate, Scale };

 class RenderArea : public QWidget
 {
     Q_OBJECT

 public:
     RenderArea(QWidget *parent = 0);

     void setOperations(const QList<Operation> &operations);
     void setShape(const QPainterPath &shape);

     QSize minimumSizeHint() const;
     QSize sizeHint() const;

 protected:
     void paintEvent(QPaintEvent *event);

 private:
     void drawCoordinates(QPainter &painter);
     void drawOutline(QPainter &painter);
     void drawShape(QPainter &painter);
     void transformPainter(QPainter &painter);

     QList<Operation> operations;
     QPainterPath shape;
     QRect xBoundingRect;
     QRect yBoundingRect;
 };

 #endif
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