import re import gobject import gtk import hippo import rsvg import cairo from sugar.graphics.iconcolor import IconColor class _IconCache: def __init__(self): self._icons = {} self._theme = gtk.icon_theme_get_default() def _read_icon(self, filename, color): icon_file = open(filename, 'r') if color == None: return rsvg.Handle(file=filename) else: data = icon_file.read() icon_file.close() fill = color.get_fill_color() stroke = color.get_stroke_color() entity = '' % fill data = re.sub('', entity, data) entity = '' % stroke data = re.sub('', entity, data) return rsvg.Handle(data=data) def get_handle(self, name, color, size): info = self._theme.lookup_icon(name, int(size), 0) if color: key = (info.get_filename(), color.to_string()) else: key = info.get_filename() if self._icons.has_key(key): icon = self._icons[key] else: icon = self._read_icon(info.get_filename(), color) self._icons[key] = icon return icon class CanvasIcon(hippo.CanvasBox, hippo.CanvasItem): __gtype_name__ = 'CanvasIcon' __gproperties__ = { 'icon-name': (str, None, None, None, gobject.PARAM_READWRITE), 'color' : (object, None, None, gobject.PARAM_READWRITE), 'size' : (int, None, None, 0, 1024, 24, gobject.PARAM_READWRITE) } _cache = _IconCache() def __init__(self, **kwargs): self._size = 24 self._color = None self._icon_name = None hippo.CanvasBox.__init__(self, **kwargs) self._buffer = None self._buffer_size = 0.0 self.connect('button-press-event', self._button_press_event_cb) def do_set_property(self, pspec, value): if pspec.name == 'icon-name': self._icon_name = value self.emit_paint_needed(0, 0, -1, -1) elif pspec.name == 'color': self._color = value self.emit_paint_needed(0, 0, -1, -1) elif pspec.name == 'size': self._size = value self.emit_request_changed() def do_get_property(self, pspec): if pspec.name == 'size': return self._size elif pspec.name == 'icon-name': return self._icon_name elif pspec.name == 'color': return self._color def _get_buffer(self, cr, handle, size): if self._buffer and self._buffer_size != size: del self._buffer self._buffer = None if self._buffer == None: target = cr.get_target() surface = target.create_similar(cairo.CONTENT_COLOR_ALPHA, int(size) + 1, int(size) + 1) dimensions = handle.get_dimension_data() scale = float(size) / float(dimensions[0]) ctx = cairo.Context(surface) ctx.scale(scale, scale) handle.render_cairo(ctx) del ctx self._buffer = surface self._buffer_scale = scale return self._buffer def do_paint_below_children(self, cr, damaged_box): icon_name = self._icon_name if icon_name == None: icon_name = 'stock-missing' handle = CanvasIcon._cache.get_handle( icon_name, self._color, self._size) buf = self._get_buffer(cr, handle, self._size) cr.set_source_surface(buf, 0.0, 0.0) cr.paint() def do_get_width_request(self): return self._size def do_get_height_request(self, for_width): return self._size def _button_press_event_cb(self, item, event): item.emit_activated()