LRESULT CALLBACK MainWnd::WindowProc(
HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
) {
if(WM_NCCREATE == uMsg) {
if(!DefWindowProc(hWnd, uMsg, wParam, lParam)) {
return FALSE;
}
/* Cannot find /this/ pointer if a message (e.g. WM_GETMINMAXINFO) is
sent before this message. */
new MainWnd(hWnd);
return TRUE;
}
MainWnd *wnd =
reinterpret_cast< MainWnd * >(GetWindowLong(hWnd, GWL_USERDATA));
switch(uMsg) {
case WM_NCDESTROY:
delete wnd; // if NC create failed, wnd should be NULL so this is OK
break; // chain to default handler
case WM_CREATE:
return wnd->on_create(reinterpret_cast< LPCREATESTRUCT >(lParam));
case WM_DESTROY:
wnd->on_destroy();
return 0;
case WM_PAINT:
wnd->paint();
return 0;
case WM_COMMAND:
wnd->on_command(HIWORD(wParam), LOWORD(wParam), reinterpret_cast< HWND >(lParam));
return 0;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
