diff options
| author | Pietro Gagliardi <[email protected]> | 2014-04-12 15:36:05 -0400 |
|---|---|---|
| committer | Pietro Gagliardi <[email protected]> | 2014-04-12 15:36:05 -0400 |
| commit | 0a1dcfa67fce337efee917d9f9d2b75ea27dfc11 (patch) | |
| tree | 840b34efe724a869f9c7a109e84f0398d9544298 /area_windows.go | |
| parent | 97b25425735a85cea29e9f4ca2334ae47a882ca1 (diff) | |
Made Areas on Windows flicker-free.
Diffstat (limited to 'area_windows.go')
| -rw-r--r-- | area_windows.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/area_windows.go b/area_windows.go index 432b231..3537a75 100644 --- a/area_windows.go +++ b/area_windows.go @@ -103,6 +103,8 @@ func paintArea(s *sysData) { return } + // TODO don't do the above, but always draw the background color? + r1, _, err := _beginPaint.Call( uintptr(s.hwnd), uintptr(unsafe.Pointer(&ps))) @@ -595,6 +597,10 @@ func areaWndProc(s *sysData) func(hwnd _HWND, uMsg uint32, wParam _WPARAM, lPara case _WM_PAINT: paintArea(s) return 0 + case _WM_ERASEBKGND: + // don't draw a background; we'll do so when painting + // this is to make things flicker-free; see http://msdn.microsoft.com/en-us/library/ms969905.aspx + return 1 case _WM_HSCROLL: // TODO make this unnecessary if s != nil && s.hwnd != 0 { // this message can be sent before s is assigned properly @@ -708,7 +714,7 @@ func registerAreaWndClass(s *sysData) (newClassName string, err error) { hInstance: hInstance, hIcon: icon, hCursor: cursor, - hbrBackground: areaBackgroundBrush, + hbrBackground: _HBRUSH(_NULL), // no brush; we handle WM_ERASEBKGND } ret := make(chan uiret) |