diff options
Diffstat (limited to 'alf/alfgroupbox.cpp')
| -rw-r--r-- | alf/alfgroupbox.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/alf/alfgroupbox.cpp b/alf/alfgroupbox.cpp index 9786323..5c459dc 100644 --- a/alf/alfgroupbox.cpp +++ b/alf/alfgroupbox.cpp @@ -62,6 +62,15 @@ ALF_GroupBox_PaintFrameUxtheme(ALFGroupBoxPriv *priv, HWND hwnd, HDC dc, RECT *r RECT rc; GetClientRect(hwnd, &rc); + // Skip drawing the border if that is not requested, since stretching that bitmap might be expensive. + // Will happen when a transparent child calls DrawThemeParentBackground. + RECT rcTop = { 0, 0, rc.right-rc.left, priv->layout.containerMargins.top }; + RECT rcLeft = { 0, 0, priv->layout.containerMargins.left, rc.bottom-rc.top }; + RECT rcRight = { rc.right-rc.left-priv->layout.containerMargins.right, 0, rc.right-rc.left, rc.bottom-rc.top }; + RECT rcBottom = { 0, rc.bottom-rc.top-priv->layout.containerMargins.bottom, rc.right-rc.left, rc.bottom-rc.top }; + if (!RectVisible(dc, &rcTop) && !RectVisible(dc, &rcLeft) && !RectVisible(dc, &rcRight) && !RectVisible(dc, &rcBottom)) + return; + rc.top += priv->calculatedLabelSize.cy / 2; HRGN oldClipR = CreateRectRgn(0, 0, 0, 0); |