canvas.h
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#ifndef CANVAS_H
#define CANVAS_H
#include <QWidget>
#include <QImage>
#include <QPoint>
class Canvas : public QWidget
{
Q_OBJECT
public:
explicit Canvas(QWidget *parent = 0);
signals:
public slots:
void clearImage();
protected:
void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;
private:
void drawLineTo(const QPoint &endPoint);
void resizeImage(QImage *image, const QSize &newSize);
bool scribbling;
int myPenWidth;
QColor myPenColor;
QImage image;
QPoint lastPoint;
};
#endif // CANVAS_H