diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Fl_win32.cxx | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/Fl_win32.cxx b/src/Fl_win32.cxx index 723f76297..c135d3256 100644 --- a/src/Fl_win32.cxx +++ b/src/Fl_win32.cxx @@ -601,14 +601,19 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPar Fl_Region R; Fl_X *i = Fl_X::i(window); i->wait_for_expose = 0; + char redraw_whole_window = false; if (!i->region && window->damage()) { // Redraw the whole window... i->region = CreateRectRgn(0, 0, window->w(), window->h()); + redraw_whole_window = true; } // We need to merge WIN32's damage into FLTK's damage. R = CreateRectRgn(0,0,0,0); - GetUpdateRgn(hWnd,R,0); + int r = GetUpdateRgn(hWnd,R,0); + if (r==NULLREGION && !redraw_whole_window) { + break; + } if (i->region) { // Also tell WIN32 that we are drawing someplace else as well... |