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gdk/x11: Implement GDK_CROSSING_TOUCH_BEGIN/END/DEVICE_CHANGE events

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The behavior where a touchpoint takes over the pointer position is
really backend dependent. Since this went away from the generic code,
implement it here.
This commit is contained in:
Carlos Garnacho
2017-09-19 18:14:53 +02:00
parent 97139e4027
commit fb81d7fc8f
1 changed files with 106 additions and 0 deletions
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106
gdk/x11/gdkeventsource.c
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@@ -32,6 +32,8 @@ static gboolean gdk_event_source_dispatch (GSource *source,
gpointer user_data);
static void gdk_event_source_finalize (GSource *source);
static GQuark quark_needs_enter = 0;
#define HAS_FOCUS(toplevel) \
((toplevel)->has_focus || (toplevel)->has_pointer_focus)
@@ -166,6 +168,100 @@ handle_focus_change (GdkEventCrossing *event)
}
}
static GdkEvent *
create_synth_crossing_event (GdkEventType evtype,
GdkCrossingMode mode,
const GdkEvent *real_event)
{
GdkEvent *event;
gdouble x, y;
GdkModifierType state;
g_assert (evtype == GDK_ENTER_NOTIFY || evtype == GDK_LEAVE_NOTIFY);
event = gdk_event_new (evtype);
event->crossing.send_event = TRUE;
event->crossing.window = g_object_ref (real_event->any.window);
event->crossing.detail = GDK_NOTIFY_ANCESTOR;
event->crossing.mode = mode;
event->crossing.time = gdk_event_get_time (real_event);
gdk_event_set_device (event, gdk_event_get_device (real_event));
gdk_event_set_source_device (event, gdk_event_get_device (real_event));
if (gdk_event_get_state (real_event, &state))
event->crossing.state = state;
if (gdk_event_get_coords (real_event, &x, &y))
gdk_event_set_coords (event, x, y);
return event;
}
static void
handle_touch_synthetic_crossing (GdkEvent *event)
{
GdkEventType evtype = gdk_event_get_event_type (event);
GdkDevice *device = gdk_event_get_device (event);
GdkEvent *crossing = NULL;
GdkSeat *seat = gdk_device_get_seat (device);
gboolean needs_enter, set_needs_enter = FALSE;
if (quark_needs_enter == 0)
quark_needs_enter = g_quark_from_static_string ("gdk-x11-needs-enter-after-touch-end");
needs_enter =
GPOINTER_TO_UINT (g_object_get_qdata (G_OBJECT (seat), quark_needs_enter));
if (evtype == GDK_MOTION_NOTIFY && needs_enter)
{
set_needs_enter = FALSE;
crossing = create_synth_crossing_event (GDK_ENTER_NOTIFY,
GDK_CROSSING_DEVICE_SWITCH,
event);
}
else if (evtype == GDK_TOUCH_BEGIN && needs_enter &&
gdk_event_get_pointer_emulated (event))
{
set_needs_enter = FALSE;
crossing = create_synth_crossing_event (GDK_ENTER_NOTIFY,
GDK_CROSSING_TOUCH_BEGIN,
event);
}
else if (evtype == GDK_TOUCH_END &&
gdk_event_get_pointer_emulated (event))
{
set_needs_enter = TRUE;
crossing = create_synth_crossing_event (GDK_LEAVE_NOTIFY,
GDK_CROSSING_TOUCH_END,
event);
}
else if (evtype == GDK_ENTER_NOTIFY ||
evtype == GDK_LEAVE_NOTIFY)
{
/* We are receiving or shall receive a real crossing event,
* turn this off.
*/
set_needs_enter = FALSE;
}
else
return;
if (needs_enter != set_needs_enter)
{
if (!set_needs_enter)
g_object_steal_qdata (G_OBJECT (seat), quark_needs_enter);
else
g_object_set_qdata (G_OBJECT (seat), quark_needs_enter,
GUINT_TO_POINTER (TRUE));
}
if (crossing)
{
gdk_event_put (crossing);
gdk_event_free (crossing);
}
}
static GdkEvent *
gdk_event_source_translate_event (GdkEventSource *event_source,
XEvent *xevent)
@@ -255,6 +351,16 @@ gdk_event_source_translate_event (GdkEventSource *event_source,
handle_focus_change (&event->crossing);
}
if (event &&
(event->type == GDK_TOUCH_BEGIN ||
event->type == GDK_TOUCH_END ||
event->type == GDK_MOTION_NOTIFY ||
event->type == GDK_ENTER_NOTIFY ||
event->type == GDK_LEAVE_NOTIFY))
{
handle_touch_synthetic_crossing (event);
}
#ifdef HAVE_XGENERICEVENTS
if (xevent->type == GenericEvent)
XFreeEventData (dpy, &xevent->xcookie);