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@ -28,13 +28,19 @@ _NEXT_PAGE = 1
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class _TrayViewport(gtk.Viewport):
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__gproperties__ = {
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'can-scroll' : (bool, None, None, False,
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gobject.PARAM_READABLE),
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'scrollable' : (bool, None, None, False,
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gobject.PARAM_READABLE),
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'can-scroll-prev' : (bool, None, None, False,
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gobject.PARAM_READABLE),
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'can-scroll-next' : (bool, None, None, False,
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gobject.PARAM_READABLE),
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}
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def __init__(self, orientation):
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self.orientation = orientation
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self._can_scroll = False
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self._scrollable = False
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self._can_scroll_next = False
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self._can_scroll_prev = False
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gobject.GObject.__init__(self)
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@ -48,6 +54,13 @@ class _TrayViewport(gtk.Viewport):
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self.connect('size_allocate', self._size_allocate_cb)
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if self.orientation == gtk.ORIENTATION_HORIZONTAL:
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adj = self.get_hadjustment()
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else:
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adj = self.get_vadjustment()
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adj.connect('changed', self._adjustment_changed_cb)
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adj.connect('value-changed', self._adjustment_changed_cb)
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def scroll(self, direction):
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if direction == _PREVIOUS_PAGE:
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self._scroll_previous()
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@ -84,45 +97,89 @@ class _TrayViewport(gtk.Viewport):
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requisition[1] = 0
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def do_get_property(self, pspec):
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if pspec.name == 'can-scroll':
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return self._can_scroll
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if pspec.name == 'scrollable':
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return self._scrollable
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elif pspec.name == 'can-scroll-next':
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return self._can_scroll_next
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elif pspec.name == 'can-scroll-prev':
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return self._can_scroll_prev
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def _size_allocate_cb(self, viewport, allocation):
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bar_requisition = self.traybar.get_child_requisition()
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if self.orientation == gtk.ORIENTATION_HORIZONTAL:
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can_scroll = bar_requisition[0] > allocation.width
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scrollable = bar_requisition[0] > allocation.width
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else:
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can_scroll = bar_requisition[1] > allocation.height
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scrollable = bar_requisition[1] > allocation.height
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if can_scroll != self._can_scroll:
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self._can_scroll = can_scroll
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self.notify('can-scroll')
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if scrollable != self._scrollable:
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self._scrollable = scrollable
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self.notify('scrollable')
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class _TrayScrollButton(gtk.Button):
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def __init__(self, icon_name, scroll_direction):
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gobject.GObject.__init__(self)
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def _adjustment_changed_cb(self, adjustment):
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if adjustment.value <= adjustment.lower:
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can_scroll_prev = False
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else:
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can_scroll_prev = True
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if adjustment.value + adjustment.page_size >= adjustment.upper:
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can_scroll_next = False
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else:
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can_scroll_next = True
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if can_scroll_prev != self._can_scroll_prev:
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self._can_scroll_prev = can_scroll_prev
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self.notify('can-scroll-prev')
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if can_scroll_next != self._can_scroll_next:
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self._can_scroll_next = can_scroll_next
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self.notify('can-scroll-next')
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class _TrayScrollButton(ToolButton):
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def __init__(self, icon_name, scroll_direction):
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ToolButton.__init__(self)
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self._viewport = None
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self._scroll_direction = scroll_direction
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self.set_relief(gtk.RELIEF_NONE)
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self.set_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE)
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icon = Icon(icon_name = icon_name,
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icon_size=gtk.ICON_SIZE_SMALL_TOOLBAR)
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self.set_image(icon)
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icon.show()
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self.icon = Icon(icon_name = icon_name,
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icon_size=gtk.ICON_SIZE_SMALL_TOOLBAR)
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# The alignment is a hack to work around gtk.ToolButton code
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# that sets the icon_size when the icon_widget is a gtk.Image
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alignment = gtk.Alignment(0.5, 0.5)
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alignment.add(self.icon)
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self.set_icon_widget(alignment)
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alignment.show_all()
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self.connect('clicked', self._clicked_cb)
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def set_viewport(self, viewport):
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self._viewport = viewport
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self._viewport.connect('notify::can-scroll',
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self._viewport_can_scroll_changed_cb)
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self._viewport.connect('notify::scrollable',
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self._viewport_scrollable_changed_cb)
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if self._scroll_direction == _PREVIOUS_PAGE:
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self._viewport.connect('notify::can-scroll-prev',
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self._viewport_can_scroll_dir_changed_cb)
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self.set_sensitive(self._viewport.props.can_scroll_prev)
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else:
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self._viewport.connect('notify::can-scroll-next',
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self._viewport_can_scroll_dir_changed_cb)
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self.set_sensitive(self._viewport.props.can_scroll_next)
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def _viewport_scrollable_changed_cb(self, viewport, pspec):
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self.props.visible = self._viewport.props.scrollable
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def _viewport_can_scroll_dir_changed_cb(self, viewport, pspec):
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if self._scroll_direction == _PREVIOUS_PAGE:
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sensitive = self._viewport.props.can_scroll_prev
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else:
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sensitive = self._viewport.props.can_scroll_next
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def _viewport_can_scroll_changed_cb(self, viewport, pspec):
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self.props.visible = self._viewport.props.can_scroll
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self.set_sensitive(sensitive)
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def _clicked_cb(self, button):
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self._viewport.scroll(self._scroll_direction)
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