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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 = '<!ENTITY fill_color "%s">' % fill
data = re.sub('<!ENTITY fill_color .*>', entity, data)
entity = '<!ENTITY stroke_color "%s">' % stroke
data = re.sub('<!ENTITY stroke_color .*>', 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()
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