1 files changed, 59 insertions, 0 deletions
diff --git a/src/plugins/styles/modernwindows/qwindowsthemedata.cpp b/src/plugins/styles/modernwindows/qwindowsthemedata.cpp
new file mode 100644
index 0000000000..44569e054d
--- /dev/null
+++ b/src/plugins/styles/modernwindows/qwindowsthemedata.cpp
@@ -0,0 +1,59 @@
+// 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;
+}