Show arrows only when the icons does not fit.

This commit is contained in:
Marco Pesenti Gritti 2007-08-27 22:10:18 +02:00
parent 7fcc23b4c8
commit c742cff64d
2 changed files with 40 additions and 2 deletions

View File

@ -22,7 +22,14 @@ from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.icon import Icon
class _TrayViewport(gtk.Viewport):
__gproperties__ = {
'can-scroll' : (bool, None, None, False,
gobject.PARAM_READABLE),
}
def __init__(self):
self._can_scroll = False
gobject.GObject.__init__(self)
self.set_shadow_type(gtk.SHADOW_NONE)
@ -32,6 +39,8 @@ class _TrayViewport(gtk.Viewport):
self.add(self.traybar)
self.traybar.show()
self.connect('size_allocate', self._size_allocate_cb)
def scroll_right(self):
adj = self.get_hadjustment()
new_value = adj.value + self.allocation.width
@ -42,6 +51,21 @@ class _TrayViewport(gtk.Viewport):
new_value = adj.value - self.allocation.width
adj.value = max(adj.lower, new_value)
def do_get_property(self, pspec):
if pspec.name == 'can-scroll':
return self._can_scroll
def _size_allocate_cb(self, viewport, allocation):
bar_requisition = self.traybar.get_child_requisition()
if bar_requisition[0] < allocation.width:
can_scroll = False
else:
can_scroll = True
if can_scroll != self._can_scroll:
self._can_scroll = can_scroll
self.notify('can-scroll')
class HTray(gtk.HBox):
def __init__(self, **kwargs):
gobject.GObject.__init__(self, **kwargs)
@ -55,9 +79,10 @@ class HTray(gtk.HBox):
icon.show()
self.pack_start(self._scroll_left, False)
self._scroll_left.show()
self._viewport = _TrayViewport()
self._viewport.connect('notify::can-scroll',
self._viewport_can_scroll_changed_cb)
self.pack_start(self._viewport)
self._viewport.show()
@ -70,6 +95,10 @@ class HTray(gtk.HBox):
icon.show()
self.pack_start(self._scroll_right, False)
def _viewport_can_scroll_changed_cb(self, viewport, pspec):
if self._viewport.props.can_scroll:
self._scroll_left.show()
self._scroll_right.show()
def _scroll_left_cb(self, button):

View File

@ -41,6 +41,15 @@ for i in range(0, 100):
tray.add_item(button)
button.show()
tray = HTray()
box.pack_start(tray, False)
tray.show()
for i in range(0, 10):
button = TrayButton(icon_name=theme_icons[i])
tray.add_item(button)
button.show()
test.pack_start(box)
box.show()