AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity

widget: tighten the conditions at which a press event is emulated

Browse Source 
Make it really sure that the event is only emitted after every gesture
that consumed the button press is done with the sequence.
The event must only be emulated if a gesture in the capture phase happened
to consume the event, be cancelled, and
This commit is contained in:
Carlos Garnacho 2014-05-07 19:08:50 +02:00
parent 6e9b054543
commit fe9685bca1
2 changed files with 71 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gtk/gtkgesture.c
View File

@ -510,7 +510,10 @@ gtk_gesture_handle_event (GtkEventController *controller,
PointData *data;
data = g_hash_table_lookup (priv->points, sequence);
data->press_handled = TRUE;
/* If the sequence was claimed early, the press event will be consumed */
if (gtk_gesture_get_sequence_state (gesture, sequence) == GTK_EVENT_SEQUENCE_CLAIMED)
data->press_handled = TRUE;
}
break;
@ -820,7 +823,7 @@ gtk_gesture_set_sequence_state (GtkGesture *gesture,
return FALSE;
if (data->state == state)
return TRUE;
return FALSE;
/* denied sequences remain denied */
if (data->state == GTK_EVENT_SEQUENCE_DENIED)

92
gtk/gtkwidget.c
View File

@ -4181,31 +4181,65 @@ _gtk_widget_get_emulating_sequence (GtkWidget *widget,
}
static gboolean
gtk_widget_needs_press_emulation (GtkWidget *widget,
GdkEventSequence *sequence)
{
GtkWidgetPrivate *priv = widget->priv;
gboolean sequence_press_handled = FALSE;
GList *l;
/* Check whether there is any remaining gesture in
* the capture phase that handled the press event
*/
for (l = priv->event_controllers; l; l = l->next)
{
EventControllerData *data;
GtkGesture *gesture;
data = l->data;
if (data->phase != GTK_PHASE_CAPTURE)
continue;
if (!GTK_IS_GESTURE (data->controller))
continue;
gesture = GTK_GESTURE (data->controller);
sequence_press_handled |=
(gtk_gesture_handles_sequence (gesture, sequence) &&
_gtk_gesture_handled_sequence_press (gesture, sequence));
}
return !sequence_press_handled;
}
static gint
_gtk_widget_set_sequence_state_internal (GtkWidget *widget,
GdkEventSequence *sequence,
GtkEventSequenceState state,
GList *group)
GtkGesture *emitter)
{
gboolean emulates_pointer, sequence_handled = FALSE;
GtkWidgetPrivate *priv = widget->priv;
const GdkEvent *mimic_event;
gboolean send_event = FALSE;
gboolean emulates_pointer;
GList *group = NULL, *l;
GdkEventSequence *seq;
gboolean handled = FALSE;
GList *l;
gint n_handled = 0;
if (!priv->event_controllers && state != GTK_EVENT_SEQUENCE_CLAIMED)
return TRUE;
if (emitter)
group = gtk_gesture_get_group (emitter);
emulates_pointer = _gtk_widget_get_emulating_sequence (widget, sequence, &seq);
mimic_event = _gtk_widget_get_last_event (widget, seq);
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventSequenceState gesture_state;
gboolean sequence_handled, retval;
EventControllerData *data;
GtkGesture *gesture;
gboolean retval;
seq = sequence;
data = l->data;
@ -4216,6 +4250,14 @@ _gtk_widget_set_sequence_state_internal (GtkWidget *widget,
gesture = GTK_GESTURE (data->controller);
if (gesture == emitter)
{
sequence_handled |=
_gtk_gesture_handled_sequence_press (gesture, sequence);
n_handled++;
continue;
}
if (seq && emulates_pointer &&
!gtk_gesture_handles_sequence (gesture, seq))
seq = NULL;
@ -4233,29 +4275,30 @@ _gtk_widget_set_sequence_state_internal (GtkWidget *widget,
}
g_signal_handler_block (data->controller, data->sequence_state_changed_id);
sequence_handled =
_gtk_gesture_handled_sequence_press (gesture, seq);
retval = gtk_gesture_set_sequence_state (gesture, seq, gesture_state);
handled |= retval;
g_signal_handler_unblock (data->controller, data->sequence_state_changed_id);
/* If the sequence goes denied, check whether this is a controller attached
* to the capture phase, that additionally handled the button/touch press (ie.
* it was consumed), the corresponding press will be emulated for widgets
* beneath, so the widgets beneath get a coherent stream of events from now on.
*/
if (retval && sequence_handled &&
data->phase == GTK_PHASE_CAPTURE &&
state == GTK_EVENT_SEQUENCE_DENIED)
send_event = TRUE;
if (retval || gesture == emitter)
{
sequence_handled |=
_gtk_gesture_handled_sequence_press (gesture, seq);
n_handled++;
}
}
if (send_event && mimic_event)
/* If the sequence goes denied, check whether this is a controller attached
* to the capture phase, that additionally handled the button/touch press (ie.
* it was consumed), the corresponding press will be emulated for widgets
* beneath, so the widgets beneath get a coherent stream of events from now on.
*/
if (n_handled > 0 && sequence_handled &&
state == GTK_EVENT_SEQUENCE_DENIED &&
gtk_widget_needs_press_emulation (widget, sequence))
_gtk_widget_emulate_press (widget, mimic_event);
return handled;
g_list_free (group);
return n_handled;
}
static gboolean
@ -16683,12 +16726,9 @@ event_controller_sequence_state_changed (GtkGesture *gesture,
GtkWidget *event_widget;
gboolean cancel = TRUE;
const GdkEvent *event;
GList *group;
group = gtk_gesture_get_group (gesture);
handled = _gtk_widget_set_sequence_state_internal (widget, sequence,
state, group);
g_list_free (group);
state, gesture);
if (!handled || state != GTK_EVENT_SEQUENCE_CLAIMED)
return;