300 lines
10 KiB
Python
300 lines
10 KiB
Python
# Copyright (C) 2007, One Laptop Per Child
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import gobject
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import gtk
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from sugar.graphics import style
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from sugar.graphics.palette import Palette, ToolInvoker
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from sugar.graphics.toolbutton import ToolButton
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from sugar.graphics.icon import Icon
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_PREVIOUS_PAGE = 0
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_NEXT_PAGE = 1
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class _TrayViewport(gtk.Viewport):
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__gproperties__ = {
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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._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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self.set_shadow_type(gtk.SHADOW_NONE)
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self.traybar = gtk.Toolbar()
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self.traybar.set_orientation(orientation)
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self.traybar.set_show_arrow(False)
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self.add(self.traybar)
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self.traybar.show()
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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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elif direction == _NEXT_PAGE:
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self._scroll_next()
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def _scroll_next(self):
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if self.orientation == gtk.ORIENTATION_HORIZONTAL:
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adj = self.get_hadjustment()
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new_value = adj.value + self.allocation.width
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adj.value = min(new_value, adj.upper - self.allocation.width)
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else:
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adj = self.get_vadjustment()
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new_value = adj.value + self.allocation.height
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adj.value = min(new_value, adj.upper - self.allocation.height)
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def _scroll_previous(self):
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if self.orientation == gtk.ORIENTATION_HORIZONTAL:
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adj = self.get_hadjustment()
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new_value = adj.value - self.allocation.width
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adj.value = max(adj.lower, new_value)
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else:
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adj = self.get_vadjustment()
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new_value = adj.value - self.allocation.height
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adj.value = max(adj.lower, new_value)
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def do_size_request(self, requisition):
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child_requisition = self.child.size_request()
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if self.orientation == gtk.ORIENTATION_HORIZONTAL:
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requisition[0] = 0
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requisition[1] = child_requisition[1]
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else:
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requisition[0] = child_requisition[0]
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requisition[1] = 0
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def do_get_property(self, pspec):
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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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scrollable = bar_requisition[0] > allocation.width
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else:
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scrollable = bar_requisition[1] > allocation.height
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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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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_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE)
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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::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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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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viewport = property(fset=set_viewport)
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class HTray(gtk.HBox):
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def __init__(self, **kwargs):
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gobject.GObject.__init__(self, **kwargs)
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self.set_direction(gtk.TEXT_DIR_LTR)
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scroll_left = _TrayScrollButton('go-left', _PREVIOUS_PAGE)
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self.pack_start(scroll_left, False)
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self._viewport = _TrayViewport(gtk.ORIENTATION_HORIZONTAL)
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self.pack_start(self._viewport)
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self._viewport.show()
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scroll_right = _TrayScrollButton('go-right', _NEXT_PAGE)
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self.pack_start(scroll_right, False)
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scroll_left.viewport = self._viewport
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scroll_right.viewport = self._viewport
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def get_children(self):
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return self._viewport.traybar.get_children()
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def add_item(self, item, index=-1):
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self._viewport.traybar.insert(item, index)
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def remove_item(self, item):
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self._viewport.traybar.remove(item)
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def get_item_index(self, item):
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return self._viewport.traybar.get_item_index(item)
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class VTray(gtk.VBox):
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def __init__(self, **kwargs):
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gobject.GObject.__init__(self, **kwargs)
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# FIXME we need a go-up icon
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scroll_left = _TrayScrollButton('go-left', _PREVIOUS_PAGE)
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self.pack_start(scroll_left, False)
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self._viewport = _TrayViewport(gtk.ORIENTATION_VERTICAL)
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self.pack_start(self._viewport)
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self._viewport.show()
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# FIXME we need a go-down icon
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scroll_right = _TrayScrollButton('go-right', _NEXT_PAGE)
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self.pack_start(scroll_right, False)
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scroll_left.viewport = self._viewport
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scroll_right.viewport = self._viewport
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def get_children(self):
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return self._viewport.traybar.get_children()
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def add_item(self, item, index=-1):
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self._viewport.traybar.insert(item, index)
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def remove_item(self, item):
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self._viewport.traybar.remove(item)
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def get_item_index(self, item):
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return self._viewport.traybar.get_item_index(item)
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class TrayButton(ToolButton):
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def __init__(self, **kwargs):
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ToolButton.__init__(self, **kwargs)
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class _IconWidget(gtk.EventBox):
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__gtype_name__ = "SugarTrayIconWidget"
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def __init__(self, icon_name=None, xo_color=None):
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gtk.EventBox.__init__(self)
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self._palette = None
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self.set_app_paintable(True)
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icon = Icon(icon_name=icon_name, xo_color=xo_color,
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icon_size=gtk.ICON_SIZE_LARGE_TOOLBAR)
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self.add(icon)
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icon.show()
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def do_expose_event(self, event):
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if self._palette and self._palette.is_up():
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invoker = self._palette.props.invoker
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invoker.draw_rectangle(event, self._palette)
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gtk.EventBox.do_expose_event(self, event)
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def set_palette(self, palette):
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if self._palette is not None:
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self._palette.props.invoker = None
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self._palette = palette
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self._palette.props.invoker = ToolInvoker(self)
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class TrayIcon(gtk.ToolItem):
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__gtype_name__ = "SugarTrayIcon"
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def __init__(self, icon_name=None, xo_color=None):
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gtk.ToolItem.__init__(self)
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self._icon_widget = _IconWidget(icon_name, xo_color)
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self.add(self._icon_widget)
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self._icon_widget.show()
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self.set_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE)
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def set_palette(self, palette):
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self._icon_widget.set_palette(palette)
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def set_tooltip(self, text):
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self.set_palette(Palette(text))
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