qregion_win.cpp File Reference

#include "qatomic.h"
#include "qbitmap.h"
#include "qbuffer.h"
#include "qimage.h"
#include "qpolygon.h"
#include "qregion.h"
#include "qt_windows.h"
#include "qpainterpath.h"

Go to the source code of this file.

Functions
static void	qt_add_rect (HRGN &winRegion, QRect r)
QRegion	qt_region_from_HRGN (HRGN rgn)
HRGN	qt_tryCreateRegion (QRegion::RegionType type, int left, int top, int right, int bottom)
void	qt_win_dispose_rgn (HRGN r)

Function Documentation

qt_add_rect()

static void qt_add_rect ( HRGN &  winRegion, QRect  r  )

static

Definition at line 116 of file qregion_win.cpp.

Referenced by QRegion::ensureHandle().

{
    HRGN rgn = CreateRectRgn(r.left(), r.top(), r.x() + r.width(), r.y() + r.height());
    if (rgn) {
        HRGN dest = CreateRectRgn(0,0,0,0);
        int result = CombineRgn(dest, winRegion, rgn, RGN_OR);
        if (result) {
            DeleteObject(winRegion);
            winRegion = dest;
        }
        DeleteObject(rgn);
    }
}

qt_region_from_HRGN()

QRegion qt_region_from_HRGN

(

HRGN

rgn

)

Definition at line 80 of file qregion_win.cpp.

Referenced by QWindowsXPStylePrivate::region().

{
    int numBytes = GetRegionData(rgn, 0, 0);
    if (numBytes == 0)
        return QRegion();

    char *buf = new char[numBytes];
    if (buf == 0)
        return QRegion();

    RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
    if (GetRegionData(rgn, numBytes, rd) == 0) {
        delete [] buf;
        return QRegion();
    }

    QRegion region;
    RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
    for (uint i = 0; i < rd->rdh.nCount; ++i) {
        QRect rect;
        rect.setCoords(r->left, r->top, r->right - 1, r->bottom - 1);
        ++r;
        region |= rect;
    }

    delete [] buf;

    return region;
}

qt_tryCreateRegion()

HRGN qt_tryCreateRegion	(	QRegion::RegionType	type,
		int	left,
		int	top,
		int	right,
		int	bottom
	)

Definition at line 55 of file qregion_win.cpp.

Referenced by qt_grab_cursor(), and QtWndProc().

{
    const int tries = 10;
    for (int i = 0; i < tries; ++i) {
        HRGN region = 0;
        switch (type) {
        case QRegion::Rectangle:
            region = CreateRectRgn(left, top, right, bottom);
            break;
        case QRegion::Ellipse:
#ifndef Q_OS_WINCE
            region = CreateEllipticRgn(left, top, right, bottom);
#endif
            break;
        }
        if (region) {
            if (GetRegionData(region, 0, 0))
                return region;
            else
                DeleteObject(region);
        }
    }
    return 0;
}

qt_win_dispose_rgn()

void qt_win_dispose_rgn

(

HRGN

r

)

Definition at line 110 of file qregion_win.cpp.

Referenced by QRegion::cleanUp().

{
    if (r)
        DeleteObject(r);
}