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## plugins/whiteboard/whiteboard_widget.py
##
## Copyright (C) 2009 Jeff Ling <jeff.ummu AT gmail.com>
## Copyright (C) 2010 Yann Leboulanger <asterix AT lagaule.org>
##
## This file is part of Gajim.
##
## Gajim is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 3 only.
##
## Gajim 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Gajim. If not, see <http://www.gnu.org/licenses/>.
##
import gtk
import gtkgui_helpers
try:
import goocanvas
HAS_GOOCANVAS = True
except:
HAS_GOOCANVAS = False
from common.xmpp import Node
from common import gajim
from dialogs import FileChooserDialog
'''
A whiteboard widget made for Gajim.
- Ummu
'''
class Whiteboard(object):
def __init__(self, account, contact, session, plugin):
self.plugin = plugin
file_path = plugin.local_file_path('whiteboard_widget.ui')
xml = gtk.Builder()
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xml.add_from_file(file_path)
self.hbox = xml.get_object('whiteboard_hbox')
self.canevas = goocanvas.Canvas()
self.hbox.pack_start(self.canevas)
self.hbox.reorder_child(self.canevas, 0)
self.canevas.set_flags(gtk.CAN_FOCUS)
self.fg_color_select_button = xml.get_object('fg_color_button')
self.root = self.canevas.get_root_item()
self.tool_buttons = []
for tool in ('brush', 'oval', 'line', 'delete'):
self.tool_buttons.append(xml.get_object(tool + '_button'))
xml.get_object('brush_button').set_active(True)
# Events
self.canevas.connect('button-press-event', self.button_press_event)
self.canevas.connect('button-release-event', self.button_release_event)
self.canevas.connect('motion-notify-event', self.motion_notify_event)
self.canevas.connect('item-created', self.item_created)
# Config
self.line_width = 2
xml.get_object('size_scale').set_value(2)
self.color = str(self.fg_color_select_button.get_color())
# SVG Storage
self.image = SVGObject(self.root, session)
xml.connect_signals(self)
# Temporary Variables for items
self.item_temp = None
self.item_temp_coords = (0, 0)
self.item_data = None
# Will be {ID: {type:'element', data:[node, goocanvas]}, ID2: {}} instance
self.recieving = {}
def on_tool_button_toggled(self, widget):
for btn in self.tool_buttons:
if btn == widget:
continue
btn.set_active(False)
def on_brush_button_toggled(self, widget):
if widget.get_active():
self.image.draw_tool = 'brush'
self.on_tool_button_toggled(widget)
def on_oval_button_toggled(self, widget):
if widget.get_active():
self.image.draw_tool = 'oval'
self.on_tool_button_toggled(widget)
def on_line_button_toggled(self, widget):
if widget.get_active():
self.image.draw_tool = 'line'
self.on_tool_button_toggled(widget)
def on_delete_button_toggled(self, widget):
if widget.get_active():
self.image.draw_tool = 'delete'
self.on_tool_button_toggled(widget)
def on_clear_button_clicked(self, widget):
self.image.clear_canvas()
def on_export_button_clicked(self, widget):
SvgChooserDialog(self.image.export_svg)
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def on_fg_color_button_color_set(self, widget):
self.color = str(self.fg_color_select_button.get_color())
def item_created(self, canvas, item, model):
print 'item created'
item.connect('button-press-event', self.item_button_press_events)
def item_button_press_events(self, item, target_item, event):
if self.image.draw_tool == 'delete':
self.image.del_item(item)
def on_size_scale_format_value(self, widget):
self.line_width = int(widget.get_value())
def button_press_event(self, widget, event):
x = event.x
y = event.y
state = event.state
self.item_temp_coords = (x, y)
if self.image.draw_tool == 'brush':
self.item_temp = goocanvas.Ellipse(parent=self.root,
center_x=x,
center_y=y,
radius_x=1,
radius_y=1,
stroke_color=self.color,
fill_color=self.color,
line_width=self.line_width)
self.item_data = 'M %s,%s L ' % (x, y)
elif self.image.draw_tool == 'oval':
self.item_data = True
if self.image.draw_tool == 'line':
self.item_data = 'M %s,%s L' % (x, y)
def motion_notify_event(self, widget, event):
x = event.x
y = event.y
state = event.state
if self.item_temp is not None:
self.item_temp.remove()
if self.item_data is not None:
if self.image.draw_tool == 'brush':
self.item_data = self.item_data + '%s,%s ' % (x, y)
self.item_temp = goocanvas.Path(parent=self.root,
data=self.item_data, line_width=self.line_width,
stroke_color=self.color)
elif self.image.draw_tool == 'oval':
self.item_temp = goocanvas.Ellipse(parent=self.root,
center_x=self.item_temp_coords[0] + (x - self.item_temp_coords[0]) / 2,
center_y=self.item_temp_coords[1] + (y - self.item_temp_coords[1]) / 2,
radius_x=abs(x - self.item_temp_coords[0]) / 2,
radius_y=abs(y - self.item_temp_coords[1]) / 2,
stroke_color=self.color,
line_width=self.line_width)
elif self.image.draw_tool == 'line':
self.item_data = 'M %s,%s L' % self.item_temp_coords
self.item_data = self.item_data + ' %s,%s' % (x, y)
self.item_temp = goocanvas.Path(parent=self.root,
data=self.item_data, line_width=self.line_width,
stroke_color=self.color)
def button_release_event(self, widget, event):
x = event.x
y = event.y
state = event.state
if self.image.draw_tool == 'brush':
self.item_data = self.item_data + '%s,%s' % (x, y)
if x == self.item_temp_coords[0] and y == self.item_temp_coords[1]:
goocanvas.Ellipse(parent=self.root,
center_x=x,
center_y=y,
radius_x=1,
radius_y=1,
stroke_color=self.color,
fill_color=self.color,
line_width=self.line_width)
self.image.add_path(self.item_data, self.line_width, self.color)
if self.image.draw_tool == 'oval':
cx = self.item_temp_coords[0] + (x - self.item_temp_coords[0]) / 2
cy = self.item_temp_coords[1] + (y - self.item_temp_coords[1]) / 2
rx = abs(x - self.item_temp_coords[0]) / 2
ry = abs(y - self.item_temp_coords[1]) / 2
self.image.add_ellipse(cx, cy, rx, ry, self.line_width, self.color)
if self.image.draw_tool == 'line':
self.item_data = 'M %s,%s L' % self.item_temp_coords
self.item_data = self.item_data + ' %s,%s' % (x, y)
if x == self.item_temp_coords[0] and y == self.item_temp_coords[1]:
goocanvas.Ellipse(parent=self.root,
center_x=x,
center_y=y,
radius_x=1,
radius_y=1,
stroke_color='black',
fill_color='black',
line_width=self.line_width)
self.image.add_path(self.item_data, self.line_width, self.color)
if self.image.draw_tool == 'delete':
pass
self.item_data = None
if self.item_temp is not None:
self.item_temp.remove()
self.item_temp = None
def recieve_element(self, element):
node = self.image.g.addChild(name=element.getAttr('name'))
self.image.g.addChild(node=node)
self.recieving[element.getAttr('rid')] = {'type':'element',
'data':[node],
'children':[]}
def recieve_attr(self, element):
node = self.recieving[element.getAttr('parent')]['data'][0]
node.setAttr(element.getAttr('name'), element.getAttr('chdata'))
self.recieving[element.getAttr('rid')] = {'type':'attr',
'data':element.getAttr('name'),
'parent':node}
self.recieving[element.getAttr('parent')]['children'].append(element.getAttr('rid'))
def apply_new(self):
for x in self.recieving.keys():
if self.recieving[x]['type'] == 'element':
self.image.add_recieved(x, self.recieving)
self.recieving = {}
class SvgChooserDialog(FileChooserDialog):
def __init__(self, on_response_ok=None, on_response_cancel=None):
'''
Choose in which SVG file to store the image
'''
def on_ok(widget, callback):
'''
check if file exists and call callback
'''
path_to_file = self.get_filename()
path_to_file = gtkgui_helpers.decode_filechooser_file_paths(
(path_to_file,))[0]
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FileChooserDialog.__init__(self,
title_text=_('Save Image as...'),
action=gtk.FILE_CHOOSER_ACTION_SAVE,
buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL, gtk.STOCK_OPEN,
gtk.RESPONSE_OK),
current_folder='',
default_response=gtk.RESPONSE_OK,
on_response_ok=(on_ok, on_response_ok),
on_response_cancel=on_response_cancel)
filter_ = gtk.FileFilter()
filter_.set_name(_('All files'))
filter_.add_pattern('*')
self.add_filter(filter_)
filter_ = gtk.FileFilter()
filter_.set_name(_('SVG Files'))
filter_.add_pattern('*.svg')
self.add_filter(filter_)
self.set_filter(filter_)
class SVGObject():
''' A class to store the svg document and make changes to it.'''
def __init__(self, root, session, height=300, width=300):
# Will be {ID: {type:'element', data:[node, goocanvas]}, ID2: {}} instance
self.items = {}
self.root = root
self.draw_tool = 'brush'
# sxe session
self.session = session
# initialize svg document
self.svg = Node(node='<svg/>')
self.svg.setAttr('version', '1.1')
self.svg.setAttr('height', str(height))
self.svg.setAttr('width', str(width))
self.svg.setAttr('xmlns', 'http://www.w3.org/2000/svg')
# TODO: make this settable
self.g = self.svg.addChild(name='g')
self.g.setAttr('fill', 'none')
self.g.setAttr('stroke-linecap', 'round')
def add_path(self, data, line_width, color):
''' adds the path to the items listing, both minidom node and goocanvas
object in a tuple '''
goocanvas_obj = goocanvas.Path(parent=self.root, data=data,
line_width=line_width, stroke_color=color)
goocanvas_obj.connect('button-press-event', self.item_button_press_events)
node = self.g.addChild(name='path')
node.setAttr('d', data)
node.setAttr('stroke-width', str(line_width))
node.setAttr('stroke', color)
self.g.addChild(node=node)
rids = self.session.generate_rids(4)
self.items[rids[0]] = {'type':'element', 'data':[node, goocanvas_obj], 'children':rids[1:]}
self.items[rids[1]] = {'type':'attr', 'data':'d', 'parent':node}
self.items[rids[2]] = {'type':'attr', 'data':'stroke-width', 'parent':node}
self.items[rids[3]] = {'type':'attr', 'data':'stroke', 'parent':node}
self.session.send_items(self.items, rids)
def add_recieved(self, parent_rid, new_items):
''' adds the path to the items listing, both minidom node and goocanvas
object in a tuple '''
node = new_items[parent_rid]['data'][0]
self.items[parent_rid] = new_items[parent_rid]
for x in new_items[parent_rid]['children']:
self.items[x] = new_items[x]
if node.getName() == 'path':
goocanvas_obj = goocanvas.Path(parent=self.root,
data=node.getAttr('d'),
line_width=int(node.getAttr('stroke-width')),
stroke_color=node.getAttr('stroke'))
if node.getName() == 'ellipse':
goocanvas_obj = goocanvas.Ellipse(parent=self.root,
center_x=float(node.getAttr('cx')),
center_y=float(node.getAttr('cy')),
radius_x=float(node.getAttr('rx')),
radius_y=float(node.getAttr('ry')),
stroke_color=node.getAttr('stroke'),
line_width=float(node.getAttr('stroke-width')))
self.items[parent_rid]['data'].append(goocanvas_obj)
goocanvas_obj.connect('button-press-event', self.item_button_press_events)
def add_ellipse(self, cx, cy, rx, ry, line_width, stroke_color):
''' adds the ellipse to the items listing, both minidom node and goocanvas
object in a tuple '''
goocanvas_obj = goocanvas.Ellipse(parent=self.root,
center_x=cx,
center_y=cy,
radius_x=rx,
radius_y=ry,
stroke_color=stroke_color,
line_width=line_width)
goocanvas_obj.connect('button-press-event', self.item_button_press_events)
node = self.g.addChild(name='ellipse')
node.setAttr('cx', str(cx))
node.setAttr('cy', str(cy))
node.setAttr('rx', str(rx))
node.setAttr('ry', str(ry))
node.setAttr('stroke-width', str(line_width))
node.setAttr('stroke', stroke_color)
self.g.addChild(node=node)
rids = self.session.generate_rids(7)
self.items[rids[0]] = {'type':'element', 'data':[node, goocanvas_obj], 'children':rids[1:]}
self.items[rids[1]] = {'type':'attr', 'data':'cx', 'parent':node}
self.items[rids[2]] = {'type':'attr', 'data':'cy', 'parent':node}
self.items[rids[3]] = {'type':'attr', 'data':'rx', 'parent':node}
self.items[rids[4]] = {'type':'attr', 'data':'ry', 'parent':node}
self.items[rids[5]] = {'type':'attr', 'data':'stroke-width', 'parent':node}
self.items[rids[6]] = {'type':'attr', 'data':'stroke', 'parent':node}
self.session.send_items(self.items, rids)
def del_item(self, item):
rids = []
for x in self.items.keys():
if self.items[x]['type'] == 'element':
if self.items[x]['data'][1] == item:
for y in self.items[x]['children']:
rids.append(y)
self.del_rid(y)
rids.append(x)
self.del_rid(x)
break
self.session.del_item(rids)
def clear_canvas(self):
for x in self.items.keys():
if self.items[x]['type'] == 'element':
self.del_rid(x)
def del_rid(self, rid):
if self.items[rid]['type'] == 'element':
self.items[rid]['data'][1].remove()
del self.items[rid]
def export_svg(self, filename):
f = open(filename, 'w')
f.writelines(str(self.svg))
f.close()
def item_button_press_events(self, item, target_item, event):
self.del_item(item)