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Merge branch 'gdk-win32-use-window-from-point-for-master' into 'master'

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GdkWin32: Fix mouse events in presence of transparent windows on the desktop

Closes #370, #417, and gimp#1082

See merge request GNOME/gtk!2800
This commit is contained in:
Matthias Clasen 2021-03-11 01:09:39 +00:00
commit e62f9e33a1
1 changed files with 14 additions and 27 deletions
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41
gdk/win32/gdkdevice-win32.c
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@ -174,38 +174,25 @@ _gdk_device_win32_surface_at_position (GdkDevice *device,
GdkSurface *window = NULL;
GdkWin32Surface *impl = NULL;
POINT screen_pt, client_pt;
HWND hwnd, hwndc;
HWND hwnd;
RECT rect;
GetCursorPos (&screen_pt);
if (!GetCursorPos (&screen_pt))
return NULL;
/* Only consider visible children of the desktop to avoid the various
* non-visible windows you often find on a running Windows box. These
* might overlap our windows and cause our walk to fail. As we assume
* WindowFromPoint() can find our windows, we follow similar logic
* here, and ignore invisible and disabled windows.
*/
hwnd = GetDesktopWindow ();
do {
window = gdk_win32_handle_table_lookup (hwnd);
/* Use WindowFromPoint instead of ChildWindowFromPoint(Ex).
* Only WindowFromPoint is able to look through transparent
* layered windows.
*/
hwnd = GetAncestor (WindowFromPoint (screen_pt), GA_ROOT);
if (window != NULL)
break;
/* Verify that we're really inside the client area of the window */
GetClientRect (hwnd, &rect);
screen_to_client (hwnd, screen_pt, &client_pt);
if (!PtInRect (&rect, client_pt))
hwnd = NULL;
screen_to_client (hwnd, screen_pt, &client_pt);
hwndc = ChildWindowFromPointEx (hwnd, client_pt, CWP_SKIPDISABLED |
CWP_SKIPINVISIBLE);
/* Verify that we're really inside the client area of the window */
if (hwndc != hwnd)
{
GetClientRect (hwndc, &rect);
screen_to_client (hwndc, screen_pt, &client_pt);
if (!PtInRect (&rect, client_pt))
hwndc = hwnd;
}
} while (hwndc != hwnd && (hwnd = hwndc, 1));
window = gdk_win32_handle_table_lookup (hwnd);
if (window && (win_x || win_y))
{