def window_grab(self, window):
mask = gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK | gdk.POINTER_MOTION_MASK | gdk.POINTER_MOTION_HINT_MASK | gdk.ENTER_NOTIFY_MASK | gdk.LEAVE_NOTIFY_MASK
gdk.pointer_grab(window.get_window(),
owner_events=True,
event_mask=mask)
#also grab the keyboard so the user won't Alt-Tab away:
gdk.keyboard_grab(window.get_window(), owner_events=False)
def popup_grab_on_window(self, window, activate_time):
if gdk.pointer_grab(window, True, gdk.BUTTON_PRESS_MASK
| gdk.BUTTON_RELEASE_MASK
| gdk.POINTER_MOTION_MASK,
None, None, activate_time) == 0:
if gdk.keyboard_grab (window, True, activate_time) == 0:
return True
else:
gdk.pointer_ungrab(activate_time)
return False
return False
def popup_grab_on_window(self, window, activate_time):
if gdk.pointer_grab(
window, True, gdk.BUTTON_PRESS_MASK
| gdk.BUTTON_RELEASE_MASK
| gdk.POINTER_MOTION_MASK, None, None, activate_time) == 0:
if gdk.keyboard_grab(window, True, activate_time) == 0:
return True
else:
gdk.pointer_ungrab(activate_time)
return False
return False
def _popup_grab_window(self):
activate_time = 0L
if gdk.pointer_grab(self._entry.window, True,
(gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK
| gdk.POINTER_MOTION_MASK), None, None,
activate_time) == 0:
if gdk.keyboard_grab(self._entry.window, True, activate_time) == 0:
return True
else:
self._entry.window.get_display().pointer_ungrab(activate_time)
return False
return False
def popup_grab_window(self):
activate_time = 0L
if gdk.pointer_grab(self.popup_window.window, True,
(gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.POINTER_MOTION_MASK),
None, None, activate_time) == 0:
if gdk.keyboard_grab(self.popup_window.window, True, activate_time) == 0:
return True
else:
self.popup_window.window.get_display().pointer_ungrab(activate_time);
return False
return False
def _popup_grab_window(self):
activate_time = 0L
window = self.get_window()
if gdk.pointer_grab(window, True,
(gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.POINTER_MOTION_MASK),
None, None, activate_time) == 0:
if gdk.keyboard_grab(window, True, activate_time) == 0:
return True
else:
window.pointer_ungrab(activate_time)
return False
return False
def establish_grab(self, t=0):
# Grab, permitting normal interaction with the app (i.e. with the widgets
# in the panel).
mask = gdk.BUTTON_PRESS_MASK
grab_result = gdk.pointer_grab(self.window, True, mask, None, None, t)
if grab_result != gdk.GRAB_SUCCESS:
print "pointer grab failed:", grab_result
return False
# Keyboard grab too, to prevent workspace switching.
grab_result = gdk.keyboard_grab(self.window, False, t)
if grab_result != gdk.GRAB_SUCCESS:
print "keyboard grab failed:", grab_result
gdk.pointer_ungrab()
return False
# But limit events to just the panel for neatness and a hint of modality.
self.grab_add()
self._grabbed = True
return True
def establish_grab(self, t=0):
# Grab, permitting normal interaction with the app (i.e. with the widgets
# in the panel).
mask = gdk.BUTTON_PRESS_MASK
gdk_window = self.get_window()
grab_result = gdk.pointer_grab(gdk_window, True, mask, None, None, t)
if grab_result != gdk.GRAB_SUCCESS:
logger.warning("pointer grab failed: %r", grab_result)
return False
# Keyboard grab too, to prevent workspace switching.
grab_result = gdk.keyboard_grab(gdk_window, False, t)
if grab_result != gdk.GRAB_SUCCESS:
logger.warning("keyboard grab failed: %r", grab_result)
gdk.pointer_ungrab(gdk.CURRENT_TIME)
return False
# But limit events to just the panel for neatness and a hint of modality.
self.grab_add()
self._grabbed = True
return True
def _start_drag(self, tdw, event):
# Attempt to start a new drag, calling drag_start_cb() if successful.
if self.in_drag:
return
if hasattr(event, "x"):
self.start_x = event.x
self.start_y = event.y
else:
#last_x, last_y = tdw.get_pointer()
last_t, last_x, last_y = self.doc.get_last_event_info(tdw)
self.start_x = last_x
self.start_y = last_y
tdw_window = tdw.get_window()
event_mask = (gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK
| gdk.POINTER_MOTION_MASK)
cursor = self.active_cursor
if cursor is None:
cursor = self.inactive_cursor
# Grab the pointer
grab_status = gdk.pointer_grab(tdw_window, False, event_mask, None,
cursor, event.time)
if grab_status != gdk.GRAB_SUCCESS:
logger.warning("pointer grab failed: %r", grab_status)
logger.debug("gdk_pointer_is_grabbed(): %r",
gdk.pointer_is_grabbed())
# There seems to be a race condition between this grab under
# PyGTK/GTK2 and some other grab - possibly just the implicit grabs
# on color selectors: https://gna.org/bugs/?20068 Only pointer
# events are affected, and PyGI+GTK3 is unaffected.
#
# It's probably safest to exit the mode and not start the drag.
# This condition should be rare enough for this to be a valid
# approach: the irritation of having to click again to do something
# should be far less than that of getting "stuck" in a drag.
if self is self.doc.modes.top:
logger.debug("Exiting mode")
self.doc.modes.pop()
# Sometimes a pointer ungrab is needed even though the grab
# apparently failed to avoid the UI partially "locking up" with the
# stylus (and only the stylus). Happens when WMs like Xfwm
# intercept an <Alt>Button combination for window management
# purposes. Results in gdk.GRAB_ALREADY_GRABBED, but this line is
# necessary to avoid the rest of the UI becoming unresponsive even
# though the canvas can be drawn on with the stylus. Are we
# cancelling an implicit grab here, and why is it device specific?
gdk.pointer_ungrab(event.time)
return
# We managed to establish a grab, so watch for it being broken.
# This signal is disconnected when the mode leaves.
connid = tdw.connect("grab-broken-event", self.tdw_grab_broken_cb)
self._grab_broken_conninfo = (tdw, connid)
# Grab the keyboard too, to be certain of getting the key release event
# for a spacebar drag.
grab_status = gdk.keyboard_grab(tdw_window, False, event.time)
if grab_status != gdk.GRAB_SUCCESS:
logger.warning("Keyboard grab failed: %r", grab_status)
gdk.pointer_ungrab(event.time)
if self is self.doc.modes.top:
logger.debug("Exiting mode")
self.doc.modes.pop()
return
# GTK too...
tdw.grab_add()
self._grab_widget = tdw
# Drag has started, perform whatever action the mode needs.
self.drag_start_cb(tdw, event)
def lock(self):
pointer_grab(self.window.window, True)
keyboard_grab(self.window.window, True)
def _start_drag(self, tdw, event):
# Attempt to start a new drag, calling drag_start_cb() if successful.
if self.in_drag:
return
if hasattr(event, "x"):
self.start_x = event.x
self.start_y = event.y
else:
#last_x, last_y = tdw.get_pointer()
last_t, last_x, last_y = self.doc.get_last_event_info(tdw)
self.start_x = last_x
self.start_y = last_y
tdw_window = tdw.get_window()
event_mask = (gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.POINTER_MOTION_MASK)
cursor = self.active_cursor
if cursor is None:
cursor = self.inactive_cursor
# Grab the pointer
grab_status = gdk.pointer_grab(tdw_window, False, event_mask, None,
cursor, event.time)
if grab_status != gdk.GRAB_SUCCESS:
logger.warning("pointer grab failed: %r", grab_status)
logger.debug("gdk_pointer_is_grabbed(): %r",
gdk.pointer_is_grabbed())
# There seems to be a race condition between this grab under
# PyGTK/GTK2 and some other grab - possibly just the implicit grabs
# on colour selectors: https://gna.org/bugs/?20068 Only pointer
# events are affected, and PyGI+GTK3 is unaffected.
#
# It's probably safest to exit the mode and not start the drag.
# This condition should be rare enough for this to be a valid
# approach: the irritation of having to click again to do something
# should be far less than that of getting "stuck" in a drag.
if self is self.doc.modes.top:
logger.debug("Exiting mode")
self.doc.modes.pop()
# Sometimes a pointer ungrab is needed even though the grab
# apparently failed to avoid the UI partially "locking up" with the
# stylus (and only the stylus). Happens when WMs like Xfwm
# intercept an <Alt>Button combination for window management
# purposes. Results in gdk.GRAB_ALREADY_GRABBED, but this line is
# necessary to avoid the rest of the UI becoming unresponsive even
# though the canvas can be drawn on with the stylus. Are we
# cancelling an implicit grab here, and why is it device specific?
gdk.pointer_ungrab(event.time)
return
# We managed to establish a grab, so watch for it being broken.
# This signal is disconnected when the mode leaves.
connid = tdw.connect("grab-broken-event", self.tdw_grab_broken_cb)
self._grab_broken_conninfo = (tdw, connid)
# Grab the keyboard too, to be certain of getting the key release event
# for a spacebar drag.
grab_status = gdk.keyboard_grab(tdw_window, False, event.time)
if grab_status != gdk.GRAB_SUCCESS:
logger.warning("Keyboard grab failed: %r", grab_status)
gdk.pointer_ungrab(event.time)
if self is self.doc.modes.top:
logger.debug("Exiting mode")
self.doc.modes.pop()
return
# GTK too...
tdw.grab_add()
self._grab_widget = tdw
# Drag has started, perform whatever action the mode needs.
self.drag_start_cb(tdw, event)
