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linkbutton.py
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linkbutton.py
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# Copyright (C) 2007, One Laptop Per Child
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GObject
from gi.repository import Rsvg
import os
import io
import cairo
from gettext import gettext as _
import re
from sugar3.graphics.palettemenu import PaletteMenuItemSeparator
from sugar3.graphics.palettemenu import PaletteMenuItem
from sugar3.graphics.palettemenu import PaletteMenuBox
from sugar3.graphics.palette import Palette
from sugar3.graphics.tray import TrayButton
from sugar3.graphics import style
class LinkButton(TrayButton, GObject.GObject):
__gtype_name__ = 'LinkButton'
__gsignals__ = {
'remove_link': (GObject.SignalFlags.RUN_FIRST,
None, ([str])),
}
notes_changed_signal = GObject.Signal(
'notes-changed', arg_types=[str, str])
_dest_x = style.zoom(10)
_dest_y = style.zoom(20)
def __init__(self, buf, color, title, owner, hash, notes=None):
TrayButton.__init__(self)
self._fill, self._stroke = color.split(',')
self.set_image(buf)
self.hash = hash
self.notes = notes
info = title + '\n' + owner
self.setup_rollover_options(info)
def get_image_coords(self, relative_to):
return self._img.translate_coordinates(
relative_to, self._dest_x, self._dest_y)
def show_thumb(self):
self._img.set_from_pixbuf(self._pixbuf_bg)
def hide_thumb(self):
xo_buddy = os.path.join(os.path.dirname(__file__), "icons/link.svg")
bg_surface = self._read_link_background(xo_buddy)
bg_width, bg_height = style.zoom(120), style.zoom(110)
pixbuf = Gdk.pixbuf_get_from_surface(bg_surface, 0, 0,
bg_width, bg_height)
self._img.set_from_pixbuf(pixbuf)
def set_image(self, buf):
self._img = Gtk.Image()
str_buf = io.BytesIO(buf)
thumb_surface = cairo.ImageSurface.create_from_png(str_buf)
xo_buddy = os.path.join(os.path.dirname(__file__), "icons/link.svg")
bg_surface = self._read_link_background(xo_buddy)
cairo_context = cairo.Context(bg_surface)
cairo_context.set_source_surface(thumb_surface,
self._dest_x, self._dest_y)
thumb_width, thumb_height = style.zoom(100), style.zoom(80)
cairo_context.rectangle(self._dest_x, self._dest_y,
thumb_width, thumb_height)
cairo_context.fill()
bg_width, bg_height = style.zoom(120), style.zoom(110)
self._pixbuf_bg = Gdk.pixbuf_get_from_surface(bg_surface, 0, 0,
bg_width, bg_height)
self._img.set_from_pixbuf(self._pixbuf_bg)
self.set_icon_widget(self._img)
self._img.show()
def _read_link_background(self, filename):
icon_file = open(filename, 'rb')
data = icon_file.read()
icon_file.close()
entity = b'<!ENTITY fill_color "%s">' % self._fill.encode()
data = re.sub(b'<!ENTITY fill_color .*>', entity, data)
entity = b'<!ENTITY stroke_color "%s">' % self._stroke.encode()
data = re.sub(b'<!ENTITY stroke_color .*>', entity, data)
link_width, link_height = style.zoom(120), style.zoom(110)
link_surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
link_width, link_height)
link_context = cairo.Context(link_surface)
link_scale_w = link_width * 1.0 / 120
link_scale_h = link_height * 1.0 / 110
link_context.scale(link_scale_w, link_scale_h)
handler = Rsvg.Handle.new_from_data(data)
handler.render_cairo(link_context)
return link_surface
def setup_rollover_options(self, info):
palette = Palette(info, text_maxlen=50)
self.set_palette(palette)
box = PaletteMenuBox()
palette.set_content(box)
box.show()
menu_item = PaletteMenuItem(_('Remove'), 'list-remove')
menu_item.connect('activate', self.item_remove_cb)
box.append_item(menu_item)
menu_item.show()
separator = PaletteMenuItemSeparator()
box.append_item(separator)
separator.show()
textview = Gtk.TextView()
textview.props.height_request = style.GRID_CELL_SIZE * 2
textview.props.width_request = style.GRID_CELL_SIZE * 3
textview.props.hexpand = True
textview.props.vexpand = True
box.append_item(textview)
textview.show()
buffer = textview.get_buffer()
if self.notes is None:
buffer.set_text(_('Take notes on this page'))
else:
buffer.set_text(self.notes)
buffer.connect('changed', self.__buffer_changed_cb)
def item_remove_cb(self, widget):
self.emit('remove_link', self.hash)
def __buffer_changed_cb(self, buffer):
start, end = buffer.get_bounds()
self.notes = buffer.get_text(start, end, False)
self.notes_changed_signal.emit(self.hash, self.notes)