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Filter out spurious mouse messages while handling pen or touch input

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Luca Bacci 2021-08-16 14:53:35 +02:00
parent 52f7bb6950
commit 09ad930da4
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GPG Key ID: 8E3C8D989C98883D
1 changed files with 22 additions and 0 deletions
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22
gdk/win32/gdkevents-win32.c
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@ -168,6 +168,7 @@ static UINT aerosnap_message;
static gboolean pen_touch_input;
static POINT pen_touch_cursor_position;
static LONG last_digitizer_time;
static void
track_mouse_event (DWORD dwFlags,
@ -2334,6 +2335,21 @@ gdk_event_translate (MSG *msg,
(gpointer) msg->wParam,
GET_X_LPARAM (msg->lParam), GET_Y_LPARAM (msg->lParam)));
/* Even if we handle WM_POINTER messages, synthetic WM_MOUSEMOVE messages
* are still sent occasionally by the OS, e.g. when a surface is hidden
* or shown. Discard spurious WM_MOUSEMOVE messages while handling pen or
* touch input
*
* See the article
* "Why do I get spurious WM_MOUSEMOVE messages?" by Raymond Chen:
* https://devblogs.microsoft.com/oldnewthing/20031001-00/?p=42343
*
*/
if (_gdk_win32_tablet_input_api == GDK_WIN32_TABLET_INPUT_API_WINPOINTER &&
( (msg->time - last_digitizer_time) < 200 ||
-(msg->time - last_digitizer_time) < 200 ))
break;
pen_touch_input = FALSE;
new_window = window;
@ -2492,6 +2508,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (pointer_grab != NULL &&
@ -2521,6 +2538,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (pointer_grab != NULL &&
@ -2553,6 +2571,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (pointer_grab != NULL &&
@ -2591,6 +2610,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (IS_POINTER_PRIMARY_WPARAM (msg->wParam) &&
@ -2625,6 +2645,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (pointer_grab != NULL &&
@ -2654,6 +2675,7 @@ gdk_event_translate (MSG *msg,
current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
pen_touch_input = TRUE;
last_digitizer_time = msg->time;
}
if (!IS_POINTER_INRANGE_WPARAM (msg->wParam))