def add_tab(self, tab):
'''Add new tab to this tab group.'''
# Add to the dictionary so that the tab can be called by name
self._tabs[tab.name] = tab
self.tabs_list.append(tab)
tab.active = False
# Set first tab visible
if self.current_tab == None:
self.current_tab = 0
self.tabs_list[0].visible = True
tab_title = Label(0.01, self.color, 0, 0, tab.title)
self.labels.append(tab_title)
tab_title.set_name(tab.name)
self.add(tab_title)
self._reposition_labels()
tab_title.set_reactive(True)
tab_title.connect('button-press-event', self._on_tab_title_button_press)
timeline = clutter.Timeline(500)
alpha = clutter.Alpha(timeline, clutter.EASE_IN_OUT_SINE)
behaviour = clutter.BehaviourOpacity(255, 96, alpha)
behaviour.apply(tab_title)
self.timelines.append((timeline, alpha, behaviour))
