From d5e508b32ecb3fca87f653dc05e7bcb43e6f5b79 Mon Sep 17 00:00:00 2001 From: Aleksey Lim Date: Tue, 21 Jun 2011 19:43:57 +0000 Subject: Move toolkit dependency back to the master --- (limited to 'toolkit/scrolledbox.py') diff --git a/toolkit/scrolledbox.py b/toolkit/scrolledbox.py new file mode 100644 index 0000000..c95dae0 --- /dev/null +++ b/toolkit/scrolledbox.py @@ -0,0 +1,189 @@ +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +import gtk + +from sugar.graphics.icon import Icon + +class ScrollButton(gtk.ToolButton): + def __init__(self, icon_name): + gtk.ToolButton.__init__(self) + + icon = Icon(icon_name = icon_name, + icon_size=gtk.ICON_SIZE_SMALL_TOOLBAR) + # The alignment is a hack to work around gtk.ToolButton code + # that sets the icon_size when the icon_widget is a gtk.Image + alignment = gtk.Alignment(0.5, 0.5) + alignment.add(icon) + self.set_icon_widget(alignment) + +class ScrolledBox(gtk.EventBox): + def __init__(self, orientation, + arrows_policy=gtk.POLICY_AUTOMATIC, + scroll_policy=gtk.POLICY_AUTOMATIC): + + gtk.EventBox.__init__(self) + self.orientation = orientation + self._viewport = None + self._abox = None + self._aviewport = None + self._aviewport_sig = None + self._arrows_policy = arrows_policy + self._scroll_policy = scroll_policy + self._left = None + self._right = None + + if orientation == gtk.ORIENTATION_HORIZONTAL: + box = gtk.HBox() + else: + box = gtk.VBox() + if self._arrows_policy == gtk.POLICY_AUTOMATIC: + box.connect("size-allocate", self._box_allocate_cb) + self.add(box) + + if self._arrows_policy != gtk.POLICY_NEVER: + if orientation == gtk.ORIENTATION_HORIZONTAL: + self._left = ScrollButton('go-left') + else: + self._left = ScrollButton('go-up') + self._left.connect('clicked', self._scroll_cb, + gtk.gdk.SCROLL_LEFT) + box.pack_start(self._left, False, False, 0) + + self._scrolled = gtk.ScrolledWindow() + if orientation == gtk.ORIENTATION_HORIZONTAL: + self._scrolled.set_policy(scroll_policy, gtk.POLICY_NEVER) + else: + self._scrolled.set_policy(gtk.POLICY_NEVER, scroll_policy) + self._scrolled.connect('scroll-event', self._scroll_event_cb) + box.pack_start(self._scrolled, True, True, 0) + + if orientation == gtk.ORIENTATION_HORIZONTAL: + self._adj = self._scrolled.get_hadjustment() + else: + self._adj = self._scrolled.get_vadjustment() + self._adj.connect('changed', self._scroll_changed_cb) + self._adj.connect('value-changed', self._scroll_changed_cb) + + if self._arrows_policy != gtk.POLICY_NEVER: + if orientation == gtk.ORIENTATION_HORIZONTAL: + self._right = ScrollButton('go-right') + else: + self._right = ScrollButton('go-down') + self._right.connect('clicked', self._scroll_cb, + gtk.gdk.SCROLL_RIGHT) + box.pack_start(self._right, False, False, 0) + + def modify_fg(self, state, bg): + gtk.EventBox.modify_fg(self, state, bg) + self._viewport.get_parent().modify_fg(state, bg) + + def modify_bg(self, state, bg): + gtk.EventBox.modify_bg(self, state, bg) + self._viewport.get_parent().modify_bg(state, bg) + + def set_viewport(self, widget): + if widget == self._viewport: return + if self._viewport and self._aviewport_sig: + self._viewport.disconnect(self._aviewport_sig) + self._viewport = widget + + if self._arrows_policy == gtk.POLICY_AUTOMATIC: + self._aviewport_sig = self._viewport.connect('size-allocate', + self._viewport_allocate_cb) + + self._scrolled.add_with_viewport(widget) + + def get_viewport_allocation(self): + alloc = self._scrolled.get_allocation() + alloc.x -= self._adj.get_value() + return alloc + + def get_adjustment(self): + return self._adj + + def _box_allocate_cb(self, w, a): + self._abox = a + self._update_arrows() + + def _viewport_allocate_cb(self, w, a): + self._aviewport = a + self._update_arrows() + + def _update_arrows(self): + if not self._abox or not self._aviewport: return + + if self.orientation == gtk.ORIENTATION_HORIZONTAL: + show_flag = self._abox.width < self._aviewport.width + else: + show_flag = self._abox.height < self._aviewport.height + + if show_flag: + self._left.show() + self._right.show() + else: + self._left.hide() + self._right.hide() + + def _scroll_event_cb(self, widget, event): + if self.orientation == gtk.ORIENTATION_HORIZONTAL: + if event.direction == gtk.gdk.SCROLL_UP: + event.direction = gtk.gdk.SCROLL_LEFT + if event.direction == gtk.gdk.SCROLL_DOWN: + event.direction = gtk.gdk.SCROLL_RIGHT + else: + if event.direction == gtk.gdk.SCROLL_LEFT: + event.direction = gtk.gdk.SCROLL_UP + if event.direction == gtk.gdk.SCROLL_RIGHT: + event.direction = gtk.gdk.SCROLL_DOWN + + if self._scroll_policy == gtk.POLICY_NEVER: + self._scroll_cb(None, event.direction) + + return False + + def _scroll_cb(self, widget, direction): + if direction in (gtk.gdk.SCROLL_LEFT, gtk.gdk.SCROLL_UP): + val = max(self._adj.get_property('lower'), self._adj.get_value() + - self._adj.get_property('page_increment')) + else: + val = min(self._adj.get_property('upper') + - self._adj.get_property('page_size'), + self._adj.get_value() + + self._adj.get_property('page_increment')) + + self._adj.set_value(val) + + def _scroll_changed_cb(self, widget): + val = self._adj.get_value() + if self._left: + if val == 0: + self._left.set_sensitive(False) + else: + self._left.set_sensitive(True) + + if self._right: + if val >= self._adj.get_property('upper') - \ + self._adj.get_property('page_size'): + self._right.set_sensitive(False) + else: + self._right.set_sensitive(True) + +class HScrolledBox(ScrolledBox): + def __init__(self, **kwargs): + ScrolledBox.__init__(self, gtk.ORIENTATION_HORIZONTAL, **kwargs) + +class VScrolledBox(ScrolledBox): + def __init__(self, **kwargs): + ScrolledBox.__init__(self, gtk.ORIENTATION_VERTICAL, **kwargs) -- cgit v0.9.1