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import goocanvas
import gobject
from sugar.canvas.IconItem import IconItem
from sugar.canvas.Grid import Grid
class _MenuStrategy:
def get_menu_position(self, menu, grid_x1, grid_y1, grid_x2, grid_y2):
grid_x = grid_x2
if grid_x + menu.get_width() > Grid.COLS:
grid_x = grid_x1 - menu.get_width() + 1
grid_y = grid_y1
if grid_y < 0:
grid_y = 0
if grid_y + menu.get_width() > Grid.ROWS:
grid_y = Grid.ROWS - menu.get_width()
return [grid_x, grid_y]
class MenuIcon(IconItem, goocanvas.Item):
def __init__(self, menu_shell, **kwargs):
IconItem.__init__(self, **kwargs)
self._menu_shell = menu_shell
self._grid = menu_shell.get_grid()
self._menu = None
self._hover_menu = False
self._popdown_on_leave = False
self._popdown_sid = 0
self._menu_strategy = _MenuStrategy()
def popdown(self):
if self._menu:
self._menu.destroy()
self._menu = None
self._menu_shell.set_active(None)
def set_menu_strategy(self, strategy):
self._menu_strategy = strategy
def _popup(self, x1, y1, x2, y2):
self.popdown()
self._menu_shell.set_active(None)
grid = self._shell.get_grid()
self._menu = self.create_menu()
self._menu.connect('enter-notify-event',
self._menu_enter_notify_event_cb)
self._menu.connect('leave-notify-event',
self._menu_leave_notify_event_cb)
[grid_x1, grid_y1] = grid.convert_from_screen(x1, y1)
[grid_x2, grid_y2] = grid.convert_from_screen(x2, y2)
strategy = self._menu_strategy
[grid_x, grid_y] = strategy.get_menu_position(self._menu,
grid_x1, grid_y1,
grid_x2, grid_y2)
grid.set_constraints(self._menu, grid_x, grid_y,
self._menu.get_width(), self._menu.get_height())
self._menu.show()
self._menu_shell.set_active(self)
def _menu_enter_notify_event_cb(self, widget, event):
self._hover_menu = True
def _menu_leave_notify_event_cb(self, widget, event):
self._hover_menu = False
if self._popdown_on_leave:
self.popdown()
def do_create_view(self, canvas, parent_view):
view = IconItem.do_create_view(self, canvas, parent_view)
view.connect('enter-notify-event', self._enter_notify_event_cb, canvas)
view.connect('leave-notify-event', self._leave_notify_event_cb)
return view
def _start_popdown_timeout(self):
self._stop_popdown_timeout()
self._popdown_sid = gobject.timeout_add(1000, self._popdown_timeout_cb)
def _stop_popdown_timeout(self):
if self._popdown_sid > 0:
gobject.source_remove(self._popdown_sid)
self._popdown_sid = 0
def _enter_notify_event_cb(self, view, target, event, canvas):
self._stop_popdown_timeout()
[x1, y1] = canvas.convert_to_pixels(view.get_bounds().x1,
view.get_bounds().y1)
[x2, y2] = canvas.convert_to_pixels(view.get_bounds().x2,
view.get_bounds().y2)
[window_x, window_y] = canvas.window.get_origin()
x1 += window_x
y1 += window_y
x2 += window_x
y2 += window_y
self._popup(int(x1), int(y1), int(x2), int(y2))
def _popdown_timeout_cb(self):
self._popdown_sid = 0
if not self._hover_menu:
self.popdown()
else:
self._popdown_on_leave = True
return False
def _leave_notify_event_cb(self, view, target, event):
self._start_popdown_timeout()
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