/usr/share/pyshared/labyrinth_lib/Links.py is in labyrinth 0.6-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of Labyrinth
#
# Copyright (C) 2006 - Don Scorgie <Don@Scorgie.org>
#
# Labyrinth 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; either version 2 of the License, or
# (at your option) any later version.
#
# Labyrinth 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 Labyrinth; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor,
# Boston, MA 02110-1301 USA
#
import math
import gettext
_ = gettext.gettext
import gobject
import gtk
import BaseThought
import utils
def norm(x, y):
mod = math.sqrt(abs((x[0]**2 - y[0]**2) + (x[1]**2 - y[1]**2)))
return [abs(x[0]-y[0]) / (mod), abs(x[1] - y[1]) / (mod)]
class Link (gobject.GObject):
__gsignals__ = dict (select_link = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_PYOBJECT,)),
update_view = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
()),
popup_requested = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_PYOBJECT, gobject.TYPE_INT)))
def __init__ (self, save, parent = None, child = None, start_coords = None, end_coords = None, strength = 2):
super (Link, self).__init__()
self.parent = parent
self.child = child
self.end = end_coords
self.start = start_coords
self.strength = strength
self.element = save.createElement ("link")
self.selected = False
self.color = utils.gtk_to_cairo_color(gtk.gdk.color_parse("black"))
if not self.start and parent and parent.lr:
self.start = (parent.ul[0]-((parent.ul[0]-parent.lr[0]) / 2.), \
parent.ul[1]-((parent.ul[1]-parent.lr[1]) / 2.))
if parent and child:
self.find_ends ()
def get_save_element (self):
return self.element
def includes (self, coords, mode):
# TODO: Change this to make link selection work. Also needs
# some fairly large changes in MMapArea
if not self.start or not self.end or not coords:
return False
mag = (math.sqrt(((self.end[0] - self.start[0]) ** 2) + \
((self.end[1] - self.start[1]) ** 2)))
U = (((coords[0] - self.start[0]) * (self.end[0] - self.start[0])) + \
((coords[1] - self.start[1]) * (self.end[1] - self.start[1]))) / \
(mag**2)
inter = [self.start[0] + U*(self.end[0] - self.start[0]),
self.start[1] + U*(self.end[1] - self.start[1])]
dist = math.sqrt(((coords[0] - inter[0]) ** 2) + \
((coords[1] - inter[1]) ** 2))
if dist < (3+self.strength) and dist > -(3+self.strength):
if self.start[0] < self.end[0] and coords[0] > self.start[0] and coords[0] < self.end[0]:
return True
elif coords[0] < self.start[0] and coords[0] > self.end[0]:
return True
return False
def connects (self, thought, thought2):
return (self.parent == thought and self.child == thought2) or \
(self.child == thought and self.parent == thought2)
def set_end (self, coords):
self.end = coords
def set_strength (self, strength):
self.strength = strength
def change_strength (self, thought, thought2):
if not self.connects (thought, thought2):
return False
if self.parent == thought:
self.strength += 1
else:
self.strength -= 1
return self.strength != 0
def set_child (self, child):
self.child = child
self.find_ends ()
def uses (self, thought):
return self.parent == thought or self.child == thought
def find_ends (self):
(self.start, self.end) = self.parent.find_connection (self.child)
def draw (self, context):
if not self.start or not self.end:
return
cwidth = context.get_line_width ()
context.set_line_width (self.strength)
context.move_to (self.start[0], self.start[1])
if utils.use_bezier_curves:
dx = self.end[0] - self.start[0]
x2 = self.start[0] + dx / 2.0
x3 = self.end[0] - dx / 2.0
context.curve_to(x2, self.start[1], x3, self.end[1], self.end[0], self.end[1])
else:
context.line_to (self.end[0], self.end[1])
if self.selected:
color = utils.selected_colors["bg"]
context.set_source_rgb (color[0], color[1], color[2])
else:
context.set_source_rgb (self.color[0], self.color[1], self.color[2])
context.stroke ()
context.set_line_width (cwidth)
context.set_source_rgb (0.0, 0.0, 0.0)
def export (self, context, move_x, move_y):
rem = False
if not self.start or not self.end:
# Probably shouldn't do this, but its safe now
self.start = (self.parent.ul[0]-((self.parent.ul[0]-self.parent.lr[0]) / 2.), \
self.parent.ul[1]-((self.parent.ul[1]-self.parent.lr[1]) / 2.))
self.end = (self.child.ul[0]-((self.child.ul[0]-self.child.lr[0]) / 2.), \
self.child.ul[1]-((self.child.ul[1]-self.child.lr[1]) / 2.))
rem = True
cwidth = context.get_line_width ()
context.set_line_width (self.strength)
context.move_to (self.start[0]+move_x, self.start[1]+move_y)
context.line_to (self.end[0]+move_x, self.end[1]+move_y)
context.stroke ()
context.set_line_width (cwidth)
if rem:
self.start = self.end = None
def set_parent_child (self, parent, child):
self.parent = parent
self.child = child
if self.parent and self.child:
self.find_ends ()
def update_save (self):
self.element.setAttribute ("start", str(self.start))
self.element.setAttribute ("end", str(self.end))
self.element.setAttribute ("strength", str(self.strength))
self.element.setAttribute ("color", str(self.color))
if self.child:
self.element.setAttribute ("child", str(self.child.identity))
else:
self.element.setAttribute ("child", "None")
if self.parent:
self.element.setAttribute ("parent", str(self.parent.identity))
else:
self.element.setAttribute ("parent", "None")
def load (self, node):
self.parent_number = self.child_number = -1
tmp = node.getAttribute ("end")
if not tmp:
print "No tmp found"
return
self.end = utils.parse_coords (tmp)
tmp = node.getAttribute ("start")
if not tmp:
print "No start found"
return
self.start = utils.parse_coords (tmp)
self.strength = int(node.getAttribute ("strength"))
try:
colors = node.getAttribute ("color").split()
self.color = (float(colors[0].strip('(,)')), float(colors[1].strip('(,)')), float(colors[2].strip('(,)')))
except:
pass
if node.hasAttribute ("parent"):
tmp = node.getAttribute ("parent")
if tmp == "None":
self.parent_number = -1
else:
self.parent_number = int (tmp)
if node.hasAttribute ("child"):
tmp = node.getAttribute ("child")
if tmp == "None":
self.child_number = -1
else:
self.child_number = int (tmp)
def process_button_down (self, event, mode, transformed):
modifiers = gtk.accelerator_get_default_mod_mask ()
self.button_down = True
if event.button == 1:
if event.type == gtk.gdk.BUTTON_PRESS:
self.emit ("select_link", event.state & modifiers)
self.emit ("update_view")
elif event.button == 3:
self.emit ("popup_requested", event, 2)
self.emit ("update_view")
return False
def process_button_release (self, event, unending_link, mode, transformed):
return False
def process_key_press (self, event, mode):
if mode != BaseThought.MODE_EDITING or event.keyval == gtk.keysyms.Delete:
return False
if event.keyval == gtk.keysyms.plus or \
event.keyval == gtk.keysyms.KP_Add:
self.strength += 1
elif (event.keyval == gtk.keysyms.minus or \
event.keyval == gtk.keysyms.KP_Subtract) and \
self.strength > 1:
self.strength -= 1
elif event.keyval == gtk.keysyms.Escape:
self.unselect()
self.emit("update_view")
return True
def handle_motion (self, event, mode, transformed):
pass
def want_motion (self):
return False
def select(self):
self.selected = True
def unselect(self):
self.selected = False
def move_by (self, x,y):
pass
def can_be_parent (self):
return False
def set_color_cb(self, widget):
dialog = gtk.ColorSelectionDialog(_('Choose Color'))
dialog.connect('response', self.color_selection_ok_cb)
self.color_sel = dialog.colorsel
dialog.run()
def color_selection_ok_cb(self, dialog, response_id):
if response_id == gtk.RESPONSE_OK:
self.color = utils.gtk_to_cairo_color(self.color_sel.get_current_color())
dialog.destroy()
def get_popup_menu_items(self):
image = gtk.Image()
image.set_from_stock(gtk.STOCK_COLOR_PICKER, gtk.ICON_SIZE_MENU)
item = gtk.ImageMenuItem(_('Set Color'))
item.set_image(image)
item.connect('activate', self.set_color_cb)
return [item]
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