sugar-toolkit-gtk3/sugar/canvas/IconItem.py

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import re
import gobject
import gtk
import goocanvas
import rsvg
from sugar.util import GObjectSingletonMeta
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from sugar.canvas.IconColor import IconColor
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_ICON_SIZE = 48
class _IconCache:
def __init__(self):
self._icons = {}
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def _create_icon(self, name, color):
theme = gtk.icon_theme_get_default()
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info = theme.lookup_icon(name, _ICON_SIZE, 0)
icon_file = open(info.get_filename(), 'r')
data = icon_file.read()
icon_file.close()
if color != None:
fill = color.get_fill_color()
stroke = color.get_stroke_color()
style = '.fill {fill:%s;stroke:%s;}' % (fill, fill)
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data = re.sub('\.fill \{.*\}', style, data)
style = '.shape {stroke:%s;fill:%s;}' % (stroke, stroke)
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data = re.sub('\.shape \{.*\}', style, data)
style = '.shape-and-fill {fill:%s; stroke:%s;}' % (fill, stroke)
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data = re.sub('\.shape-and-fill \{.*\}', style, data)
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return data
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def get_icon(self, name, color):
key = (name, color.get_fill_color())
if self._icons.has_key(key):
icon = self._icons[key]
else:
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icon = self._create_icon(name, color)
self._icons[key] = icon
return icon
class IconView(goocanvas.ItemViewSimple, goocanvas.ItemView):
__gtype_name__ = 'IconView'
_icon_cache = _IconCache()
def __init__(self, canvas_view, parent_view, item):
goocanvas.ItemViewSimple.__init__(self)
self.parent_view = parent_view
self.canvas_view = canvas_view
self.item = item
def do_get_item_view_at(self, x, y, cr, is_pointer_event, parent_is_visible):
result = self
cr.save()
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if self.item.transform != None:
cr.transform(self.item.transform)
if self.transform != None:
cr.transform(self.transform)
[user_x, user_y] = cr.device_to_user(x, y)
if user_x < self.item.x or \
user_x > self.item.x + self.item.size or \
user_y < self.item.y or \
user_y > self.item.y + self.item.size:
result = None
cr.restore()
return result
def do_update(self, entire_tree, cr):
if entire_tree or self.flags & goocanvas.ITEM_VIEW_NEED_UPDATE:
self.flags &= ~goocanvas.ITEM_VIEW_NEED_UPDATE
cr.save()
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if self.item.transform != None:
cr.transform(self.item.transform)
if self.transform != None:
cr.transform(self.transform)
bounds = goocanvas.Bounds()
bounds.x1 = self.item.x
bounds.y1 = self.item.y
bounds.x2 = self.item.x + self.item.size
bounds.y2 = self.item.y + self.item.size
self.item.user_bounds_to_device(cr, bounds)
self.bounds = bounds
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self.get_canvas_view().request_redraw(self.bounds)
cr.restore()
return self.bounds
def do_paint(self, cr, bounds, scale):
if self.item.color == None:
theme = gtk.icon_theme_get_default()
info = theme.lookup_icon(self.item.icon_name, self.item.size, 0)
handle = rsvg.Handle(file=info.get_filename())
else:
icon = IconView._icon_cache.get_icon(self.item.icon_name,
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self.item.color)
handle = rsvg.Handle(data=icon)
cr.save()
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if self.item.transform != None:
cr.transform(self.item.transform)
if self.transform != None:
cr.transform(self.transform)
cr.translate(self.item.x, self.item.y)
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scale_factor = float(self.item.size) / float(_ICON_SIZE)
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if scale_factor != 0.0:
cr.scale(scale_factor, scale_factor)
handle.render_cairo(cr)
cr.restore()
return self.bounds
class IconItem(goocanvas.ItemSimple, goocanvas.Item):
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__gsignals__ = {
'clicked': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE, ([])),
}
__gproperties__ = {
'x' : (float, None, None, -10e6, 10e6, 0,
gobject.PARAM_READWRITE),
'y' : (float, None, None, -10e6, 10e6, 0,
gobject.PARAM_READWRITE),
'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)
}
def __init__(self, **kwargs):
self.x = 0.0
self.y = 0.0
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self.size = 24
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self.color = None
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goocanvas.ItemSimple.__init__(self, **kwargs)
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def do_set_property(self, pspec, value):
if pspec.name == 'icon-name':
self.icon_name = value
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elif pspec.name == 'color':
self.color = value
elif pspec.name == 'size':
self.size = value
elif pspec.name == 'x':
self.x = value
elif pspec.name == 'y':
self.y = value
def do_get_property(self, pspec):
if pspec.name == 'x':
return self.x
elif pspec.name == 'y':
return self.y
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elif pspec.name == 'size':
return self.size
elif pspec.name == 'icon-name':
return self.icon_name
elif pspec.name == 'color':
return self.color
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def do_create_view(self, canvas, parent_view):
view = IconView(canvas, parent_view, self)
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view.connect('button-press-event', self.__button_press_cb)
return view
def __button_press_cb(self, view, target, event):
self.emit('clicked')