diff options
| -rw-r--r-- | src/sugar/graphics/tray.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/sugar/graphics/tray.py b/src/sugar/graphics/tray.py index d7d5918..2f5db9a 100644 --- a/src/sugar/graphics/tray.py +++ b/src/sugar/graphics/tray.py @@ -67,6 +67,25 @@ class _TrayViewport(gtk.Viewport): elif direction == _NEXT_PAGE: self._scroll_next() + def scroll_to_item(self, item): + """This function scrolls the viewport so that item will be visible.""" + assert item in self.traybar.get_children() + + # Get the allocation, and make sure that it is visible + if self.orientation == gtk.ORIENTATION_HORIZONTAL: + adj = self.get_hadjustment() + start = item.allocation.x + stop = item.allocation.x + item.allocation.width + else: + adj = self.get_vadjustment() + start = item.allocation.y + stop = item.allocation.y + item.allocation.height + + if start < adj.value: + adj.value = start + elif stop > adj.value + adj.page_size: + adj.value = stop - adj.page_size + def _scroll_next(self): allocation = self.get_allocation() if self.orientation == gtk.ORIENTATION_HORIZONTAL: @@ -218,6 +237,9 @@ class HTray(gtk.HBox): def get_item_index(self, item): return self._viewport.traybar.get_item_index(item) + def scroll_to_item(self, item): + self._viewport.scroll_to_item(item) + class VTray(gtk.VBox): def __init__(self, **kwargs): gobject.GObject.__init__(self, **kwargs) @@ -249,6 +271,9 @@ class VTray(gtk.VBox): def get_item_index(self, item): return self._viewport.traybar.get_item_index(item) + def scroll_to_item(self, item): + self._viewport.scroll_to_item(item) + class TrayButton(ToolButton): def __init__(self, **kwargs): ToolButton.__init__(self, **kwargs) |