qt-creator/shared/designerintegrationv2/sizehandlerect.h

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#ifndef SIZEHANDLERECT_H
#define SIZEHANDLERECT_H

#include "namespace_global.h"

#include "widgethostconstants.h"

#include <QtGui/QWidget>
#include <QtCore/QPoint>

namespace SharedTools {
namespace Internal {

class SizeHandleRect : public QWidget
{
    Q_OBJECT
public:
    enum Direction { LeftTop, Top, RightTop, Right, RightBottom, Bottom, LeftBottom, Left };

    SizeHandleRect(QWidget *parent, Direction d, QWidget *resizable);

    Direction dir() const  { return m_dir; }
    void updateCursor();
    void setState(SelectionHandleState st);

signals:

    void mouseButtonReleased(const QRect &, const QRect &);

protected:
    void paintEvent(QPaintEvent *e);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);

private:
    void tryResize(const QSize &delta);

private:
    const Direction m_dir;
    QPoint m_startPos;
    QPoint m_curPos;
    QSize m_startSize;
    QSize m_curSize;
    QWidget *m_resizable;
    SelectionHandleState m_state;
};

}
} // namespace SharedTools


#endif // SIZEHANDLERECT_H