source: trunk/src/gui/painting/qbackingstore_p.h@ 775

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#ifndef QBACKINGSTORE_P_H
#define QBACKINGSTORE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QDebug>
#include <QtGui/qwidget.h>
#include <private/qwidget_p.h>
#include <private/qwindowsurface_p.h>
#ifdef Q_WS_QWS
#include <private/qwindowsurface_qws_p.h>
#endif

QT_BEGIN_NAMESPACE

class QWindowSurface;

struct BeginPaintInfo {
    inline BeginPaintInfo() : wasFlushed(0), nothingToPaint(0), windowSurfaceRecreated(0) {}
    uint wasFlushed : 1;
    uint nothingToPaint : 1;
    uint windowSurfaceRecreated : 1;
};

class Q_AUTOTEST_EXPORT QWidgetBackingStore
{
public:
    QWidgetBackingStore(QWidget *t);
    ~QWidgetBackingStore();

    static void showYellowThing(QWidget *widget, const QRegion &rgn, int msec, bool);

    void sync(QWidget *exposedWidget, const QRegion &exposedRegion);
    void sync();
    void flush(QWidget *widget = 0, QWindowSurface *surface = 0);

    inline QPoint topLevelOffset() const { return tlwOffset; }

    QWindowSurface *surface() const { return windowSurface; }

    inline bool isDirty() const
    {
        return !(dirtyWidgets.isEmpty() && dirty.isEmpty() && !hasDirtyFromPreviousSync
#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER)
                 && !hasDirtyWindowDecoration()
#endif
                );
    }