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WidgetInvoker: add support for long-press events, part of #4127

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The WidgetInvoker will decide if a long press has been made
or not. We watch out for TOUCH_END events and when a long-press
event has been seen before we stop further propagation of the
event, hence there won't be any button-release or clicked
events available to the user of the widget.

There are several widgets using the WidgetInvoker, and those
handle differently touch events. The GtkButton does have a widget
implementation to handle touch events, it does stop further
propagation and emits the pressed/released signal for further
consumption [1]. We will not get a button-press/button-release
event for a touch event in this case.

The default behaviour for widgets e.g. a TreeView is to transform
the touch events into pointer events [2], for those widgets we do get
a button-press/button-release event for a touch events.

[1] http://git.gnome.org/browse/gtk+/tree/gtk/gtkbutton.c#n1809
[2] http://git.gnome.org/browse/gtk+/tree/gtk/gtkwidget.c#n5876

Signed-off-by: Simon Schampijer <simon@laptop.org>
Acked-by: Manuel Quiñones <manuq@laptop.org>
This commit is contained in:
Simon Schampijer 2012-11-01 13:35:16 +01:00
parent de7c5b90bd
commit a515976dff
1 changed files with 35 additions and 1 deletions
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36
src/sugar3/graphics/palettewindow.py
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@ -1002,6 +1002,11 @@ class WidgetInvoker(Invoker):
self._enter_hid = None
self._leave_hid = None
self._release_hid = None
self._click_hid = None
self._touch_hid = None
self._long_pressed_recognized = False
self._long_pressed_hid = None
self._long_pressed_controller = SugarGestures.LongPressController()
if parent or widget:
self.attach_widget(parent, widget)
@ -1018,9 +1023,18 @@ class WidgetInvoker(Invoker):
self.__enter_notify_event_cb)
self._leave_hid = self._widget.connect('leave-notify-event',
self.__leave_notify_event_cb)
if GObject.signal_lookup('clicked', self._widget) != 0:
self._click_hid = self._widget.connect('clicked',
self.__click_event_cb)
self._touch_hid = self._widget.connect('touch-event',
self.__touch_event_cb)
self._release_hid = self._widget.connect('button-release-event',
self.__button_release_event_cb)
self._long_pressed_hid = self._long_pressed_controller.connect(
'pressed', self.__long_pressed_event_cb, self._widget)
self._long_pressed_controller.attach(self._widget,
SugarGestures.EventControllerFlags.NONE)
self.attach(parent)
def detach(self):
@ -1028,6 +1042,11 @@ class WidgetInvoker(Invoker):
self._widget.disconnect(self._enter_hid)
self._widget.disconnect(self._leave_hid)
self._widget.disconnect(self._release_hid)
if self._click_hid:
self._widget.disconnect(self._click_hid)
self._widget.disconnect(self._touch_hid)
self._long_pressed_controller.detach(self._widget)
self._long_pressed_controller.disconnect(self._long_pressed_hid)
def get_rect(self):
allocation = self._widget.get_allocation()
@ -1075,8 +1094,19 @@ class WidgetInvoker(Invoker):
if event.mode == Gdk.CrossingMode.NORMAL:
self.notify_mouse_leave()
def __touch_event_cb(self, button, event):
if event.type == Gdk.EventType.TOUCH_END:
if self._long_pressed_recognized:
self._long_pressed_recognized = False
return True
return False
def __click_event_cb(self, button):
if self.props.toggle_palette:
self.notify_toggle_state()
def __button_release_event_cb(self, widget, event):
if event.button == 1:
if event.button == 1 and not self._click_hid:
if self.props.toggle_palette:
self.notify_toggle_state()
elif event.button == 3:
@ -1085,6 +1115,10 @@ class WidgetInvoker(Invoker):
else:
return False
def __long_pressed_event_cb(self, controller, x, y, widget):
self._long_pressed_recognized = True
self.notify_right_click()
def get_toplevel(self):
return self._widget.get_toplevel()