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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwindowsthemedata_p.h"
#include "qwindowsvistastyle_p_p.h"
/* \internal
Returns \c true if the QWindowsThemeData is valid for use.
*/
bool QWindowsThemeData::isValid()
{
return QWindowsVistaStylePrivate::useVista() && theme >= 0 && handle();
}
/* \internal
Returns the theme engine handle to the specific class.
If the handle hasn't been opened before, it opens the data, and
adds it to a static map, for caching.
*/
HTHEME QWindowsThemeData::handle()
{
if (!QWindowsVistaStylePrivate::useVista())
return nullptr;
if (!htheme)
htheme = QWindowsVistaStylePrivate::createTheme(theme, QWindowsVistaStylePrivate::winId(widget));
return htheme;
}
/* \internal
Converts a QRect to the native RECT structure.
*/
RECT QWindowsThemeData::toRECT(const QRect &qr)
{
RECT r;
r.left = qr.x();
r.right = qr.x() + qr.width();
r.top = qr.y();
r.bottom = qr.y() + qr.height();
return r;
}
/* \internal
Returns the native region of a part, if the part is considered
transparent. The region is scaled to the parts size (rect).
*/
HRGN QWindowsThemeData::mask(QWidget *widget)
{
if (!IsThemeBackgroundPartiallyTransparent(handle(), partId, stateId))
return nullptr;
HRGN hrgn;
HDC dc = nullptr;
if (widget)
dc = QWindowsVistaStylePrivate::hdcForWidgetBackingStore(widget);
RECT nativeRect = toRECT(rect);
GetThemeBackgroundRegion(handle(), dc, partId, stateId, &nativeRect, &hrgn);
return hrgn;
}
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