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gdk: strengthen touch crossing event synthesizing on programmatical crossings

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There are cases where crossing events aren't generated by input devices themselves
but rather through programmatical means (windows being moved/hidden/destroyed while
the pointer is on top).

Those events come from X as sourceid=deviceid, and GDK does its deal at lessening
this by setting a meaningful source device on such events, although this caused
some confusion on the mechanism to block/synthesize touch crossing events that
could possibly cause bogus enter events on the new window below the pointer.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=691572
This commit is contained in:
Carlos Garnacho 2012-12-03 18:28:57 +01:00
parent a763738f15
commit 3210cd6511
2 changed files with 5 additions and 2 deletions
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3
gdk/gdkdisplay.c
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@ -985,7 +985,8 @@ switch_to_pointer_grab (GdkDisplay *display,
NULL, NULL);
}
if (pointer_window != last_grab->window)
if (!info->need_touch_press_enter &&
pointer_window != last_grab->window)
synthesize_crossing_events (display, device, source_device,
last_grab->window, pointer_window,
GDK_CROSSING_UNGRAB, time, serial);

4
gdk/gdkwindow.c
View File

@ -8373,10 +8373,12 @@ send_crossing_event (GdkDisplay *display,
window_event_mask = window->event_mask;
if (type == GDK_ENTER_NOTIFY &&
pointer_info->need_touch_press_enter &&
(pointer_info->need_touch_press_enter ||
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN) &&
mode != GDK_CROSSING_TOUCH_BEGIN &&
mode != GDK_CROSSING_TOUCH_END)
{
pointer_info->need_touch_press_enter = TRUE;
block_event = TRUE;
}
else if (type == GDK_LEAVE_NOTIFY)