source: trunk/src/gui/painting/qregion.h@ 758

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#ifndef QREGION_H
#define QREGION_H

#include <QtCore/qatomic.h>
#include <QtCore/qrect.h>
#include <QtGui/qwindowdefs.h>

#ifndef QT_NO_DATASTREAM
#include <QtCore/qdatastream.h>
#endif

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

template <class T> class QVector;
class QVariant;

#if defined(Q_WS_QWS) || defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_WS_WIN) || defined(Q_OS_SYMBIAN) || defined(Q_WS_PM)
struct QRegionPrivate;
#endif

class QBitmap;

class Q_GUI_EXPORT QRegion
{
public:
    enum RegionType { Rectangle, Ellipse };

    QRegion();
    QRegion(int x, int y, int w, int h, RegionType t = Rectangle);
    QRegion(const QRect &r, RegionType t = Rectangle);
    QRegion(const QPolygon &pa, Qt::FillRule fillRule = Qt::OddEvenFill);
#ifdef QT3_SUPPORT
    QT3_SUPPORT_CONSTRUCTOR QRegion(const QPolygon &pa, bool winding);
#endif
    QRegion(const QRegion &region);
    QRegion(const QBitmap &bitmap);
    ~QRegion();
    QRegion &operator=(const QRegion &);

#ifdef QT3_SUPPORT
    inline QT3_SUPPORT bool isNull() const { return isEmpty(); }
#endif
    bool isEmpty() const;

    bool contains(const QPoint &p) const;
    bool contains(const QRect &r) const;

    void translate(int dx, int dy);
    inline void translate(const QPoint &p) { translate(p.x(), p.y()); }
    QRegion translated(int dx, int dy) const;
    inline QRegion translated(const QPoint &p) const { return translated(p.x(), p.y()); }

    // ### Qt 5: make these four functions QT4_SUPPORT
    QRegion unite(const QRegion &r) const;
    QRegion unite(const QRect &r) const;
    QRegion intersect(const QRegion &r) const;
    QRegion intersect(const QRect &r) const;
    QRegion subtract(const QRegion &r) const;