HRGN mask()
{
if ( IsThemeBackgroundPartiallyTransparent( handle(), partId, stateId ) ) {
HRGN hrgn;
GetThemeBackgroundRegion( handle(), painter ? painter->handle() : 0, partId, stateId, &rect(), &hrgn );
return hrgn;
}
return 0;
}
void SetThemeRegion(HWND hWnd, PWND_CONTEXT pcontext)
{
HTHEME hTheme;
RECT rcWindow;
HRGN hrgn, hrgn1;
int CaptionHeight, iPart;
WINDOWINFO wi;
if(!IsAppThemed())
{
if(pcontext->HasThemeRgn)
{
pcontext->HasThemeRgn = FALSE;
user32ApiHook.SetWindowRgn(hWnd, 0, TRUE);
}
return;
}
wi.cbSize = sizeof(wi);
GetWindowInfo(hWnd, &wi);
if((wi.dwStyle & WS_CAPTION)!=WS_CAPTION)
{
return;
}
/* Get the caption part id */
if (wi.dwExStyle & WS_EX_TOOLWINDOW)
iPart = WP_SMALLCAPTION;
else if (wi.dwStyle & WS_MAXIMIZE)
iPart = WP_MAXCAPTION;
else
iPart = WP_CAPTION;
pcontext->HasThemeRgn = TRUE;
CaptionHeight = wi.cyWindowBorders;
CaptionHeight += GetSystemMetrics(wi.dwExStyle & WS_EX_TOOLWINDOW ? SM_CYSMCAPTION : SM_CYCAPTION );
GetWindowRect(hWnd, &rcWindow);
rcWindow.right -= rcWindow.left;
rcWindow.bottom = CaptionHeight;
rcWindow.top = 0;
rcWindow.left = 0;
hTheme = OpenThemeData (hWnd, L"WINDOW");
GetThemeBackgroundRegion(hTheme, 0, iPart, FS_ACTIVE, &rcWindow, &hrgn);
CloseThemeData(hTheme);
GetWindowRect(hWnd, &rcWindow);
rcWindow.right -= rcWindow.left;
rcWindow.bottom -= rcWindow.top;
rcWindow.top = CaptionHeight;
rcWindow.left = 0;
hrgn1 = CreateRectRgnIndirect(&rcWindow);
CombineRgn(hrgn, hrgn, hrgn1, RGN_OR );
DeleteObject(hrgn1);
user32ApiHook.SetWindowRgn(hWnd, hrgn, TRUE);
}
