DAAbstractWidgetOverlay.h

#ifndef DAABSTRACTWIDGETOVERLAY_H
#define DAABSTRACTWIDGETOVERLAY_H
#include "DAUtilsAPI.h"
#include <QWidget>
class QPainter;
class QRegion;
 
namespace DA
{
 
class DAUTILS_API DAAbstractWidgetOverlay : public QWidget
{
    DA_DECLARE_PRIVATE(DAAbstractWidgetOverlay)
public:
    enum MaskMode
    {
        NoMask,
 
        MaskHint,
 
        AlphaMask
    };
 
    enum RenderMode
    {
        AutoRenderMode,
 
        CopyAlphaMask,
 
        DrawOverlay
    };
 
public:
    explicit DAAbstractWidgetOverlay(QWidget* parent);
    ~DAAbstractWidgetOverlay();
 
    void setMaskMode(MaskMode mode);
    MaskMode getMaskMode() const;
 
    void setRenderMode(RenderMode mode);
    RenderMode getRenderMode() const;
 
    virtual bool eventFilter(QObject* object, QEvent* event) override;
 
public:
    static QRegion maskRegion(const QRect& r, int penWidth);
    static QRegion maskRegionVOrHLine(const QLine& VOrHLine, int penWidth);
 
protected:
    virtual void drawOverlay(QPainter* painter) const = 0;
 
    virtual QRegion maskHint() const;
 
    virtual void paintEvent(QPaintEvent* event) override;
    virtual void resizeEvent(QResizeEvent* event) override;
public Q_SLOTS:
    void updateOverlay();
 
private:
    void updateMask();
    void draw(QPainter* painter) const;
};
}  // end ns da
#endif  // DAWIDGETOVERLAY_H