/usr/share/pyshared/labyrinth_lib/BaseThought.py is in labyrinth 0.6-0ubuntu3.
This file is owned by root:root, with mode 0o644.
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# This file is part of Labyrinth
#
# Copyright (C) 2006 - Don Scorgie <DonScorgie@Blueyonder.co.uk>
#
# 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 gobject
import gtk
import utils
import pango
import TextBufferMarkup
MODE_EDITING = 0
MODE_IMAGE = 1
MODE_DRAW = 2
class BaseThought (gobject.GObject):
''' The basic class to derive other thoughts from. \
Instructions for creating derivative thought types are \
given as comments'''
# These are general signals. They are available to all thoughts to
# emit. If you emit other signals, the chances are they'll be ignored
# by the MMapArea. It's you're responsiblity to catch and handle them.
# All these signals are handled correctly by the MMapArea.
__gsignals__ = dict (select_thought = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_PYOBJECT,)),
begin_editing = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
()),
popup_requested = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_PYOBJECT, gobject.TYPE_INT)),
claim_unending_link = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
()),
update_view = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
()),
create_link = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_PYOBJECT,)),
title_changed = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
(gobject.TYPE_STRING,)),
finish_editing = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
()),
delete_thought = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
()),
text_selection_changed = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
(gobject.TYPE_INT, gobject.TYPE_INT, gobject.TYPE_STRING)),
change_mouse_cursor = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_INT,)),
update_links = (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
()),
grab_focus = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_BOOLEAN,)),
update_attrs = (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_BOOLEAN, gobject.TYPE_BOOLEAN, gobject.TYPE_BOOLEAN, pango.FontDescription)))
# The first thing that should be called is this constructor
# It sets some basic properties of all thoughts and should be called
# before you start doing you're own thing with thoughts
# save: the save document passed into the derived constructor
# elem_type: a string representing the thought type (e.g. "image_thought")
def __init__ (self, save, elem_type, undo, background_color, foreground_color):
# Note: Once the thought has been successfully initialised (i.e. at the end
# of the constructor) you MUST set all_okay to True
# Otherwise, bad things will happen.
self.all_okay = False
super (BaseThought, self).__init__()
self.ul = self.lr = None
self.am_primary = False
self.am_selected = False
self.sensitive = 5
self.editing = False
self.identity = -1
self.index = 0
self.end_index = 0
self.text = ""
self.want_move = False
self.undo = undo
self.background_color = background_color
self.foreground_color = foreground_color
self.model_iter = None
extended_elem = save.createElement ("Extended")
self.extended_buffer = TextBufferMarkup.ExtendedBuffer (self.undo, extended_elem, save)
self.extended_buffer.set_text("")
self.extended_buffer.connect ("set_focus", self.focus_buffer)
self.extended_buffer.connect ("set_attrs", self.set_extended_attrs)
self.element = save.createElement (elem_type)
self.element.appendChild (extended_elem)
# These are self-explanitory. You probably don't want to
# overwrite these methods, unless you have a very good reason
def get_save_element (self):
return self.element
def make_primary (self):
self.am_primary = True
def select (self):
self.am_selected = True
def unselect (self):
self.am_selected = False
def get_max_area (self):
if not self.ul or not self.lr:
return 999,999,-999,-999
return self.ul[0], self.ul[1], self.lr[0], self.lr[1]
def okay (self):
return self.all_okay
def move_by (self, x, y):
self.ul = (self.ul[0]+x, self.ul[1]+y)
self.recalc_position ()
self.emit ("update_links")
self.emit ("update_view")
def focus_buffer (self, buf):
self.emit ("select_thought", None)
self.emit ("grab_focus", True)
def set_extended_attrs(self, buf, bold, underline, italics, pango_font):
self.emit("update_attrs", bold, underline, italics, pango_font)
def can_be_parent (self):
return True
# This, you may want to change. Though, doing so will only affect
# thoughts that are "parents"
def find_connection (self, other):
if self.editing or other.editing:
return None, None
if not self.ul or not self.lr or not other.ul \
or not other.lr:
return None, None
if utils.use_bezier_curves:
if other.ul[0] > self.lr[0]:
xfrom = self.lr[0]
xto = other.ul[0]
else:
xfrom = self.ul[0]
xto = other.lr[0]
else:
xfrom = self.ul[0]-((self.ul[0]-self.lr[0]) / 2.)
xto = other.ul[0]-((other.ul[0]-other.lr[0]) / 2.)
yfrom = self.ul[1]-((self.ul[1]-self.lr[1]) / 2.)
yto = other.ul[1]-((other.ul[1]-other.lr[1]) / 2.)
return (xfrom, yfrom), (xto, yto)
# All the rest of these should be handled within your thought
# type, supposing you actually want to handle them.
# You almost certianly do want to ;)
def process_button_down (self, event, mode, transformed):
return False
def process_button_release (self, event, unending_link, mode, transformed):
return False
def process_key_press (self, event, mode):
return False
def handle_motion (self, event, mode, transformed):
pass
def includes (self, coords, mode):
pass
def begin_editing (self):
return False
def finish_editing (self):
pass
def draw (self, context):
pass
def load (self, node):
pass
def update_save (self):
pass
def copy_text (self, clip):
pass
def cut_text (self, clip):
pass
def paste_text (self, clip):
pass
def export (self, context, move_x, move_y):
pass
def commit_text (self, im_context, string, mode):
pass
def want_motion (self):
return False
def recalc_edges (self):
pass
def recalc_position (self):
pass
def delete_surroundings(self, imcontext, offset, n_chars, mode):
pass
def preedit_changed (self, imcontext, mode):
pass
def preedit_end (self, imcontext, mode):
pass
def preedit_start (self, imcontext, mode):
pass
def retrieve_surroundings (self, imcontext, mode):
pass
def set_bold (self, active):
pass
def get_popup_menu_items(self):
pass
class ResizableThought (BaseThought):
''' A resizable thought base class. This allows the sides and corners \
of the thought to be dragged around. It only provides the very basic \
functionality. Other stuff must be done within the derived classes'''
# Possible types of resizing - where the user selected to resize
RESIZE_NONE = 0
RESIZE_LEFT = 1
RESIZE_RIGHT = 2
RESIZE_TOP = 3
RESIZE_BOTTOM = 4
RESIZE_UL = 5
RESIZE_UR = 6
RESIZE_LL = 7
RESIZE_LR = 8
def __init__ (self, save, elem_type, undo, background_color, foreground_color):
super (ResizableThought, self).__init__(save, elem_type, undo, background_color, foreground_color)
self.resizing = False
self.button_down = False
def includes (self, coords, mode):
if not self.ul or not self.lr or not coords:
return False
inside = (coords[0] < self.lr[0] + self.sensitive) and \
(coords[0] > self.ul[0] - self.sensitive) and \
(coords[1] < self.lr[1] + self.sensitive) and \
(coords[1] > self.ul[1] - self.sensitive)
self.resizing = self.RESIZE_NONE
self.motion_coords = coords
if inside and (mode != MODE_EDITING or self.button_down):
self.emit ("change_mouse_cursor", gtk.gdk.LEFT_PTR)
return inside
if inside:
# 2 cases: 1. The click was within the main area
# 2. The click was near the border
# In the first case, we handle as normal
# In the second case, we want to intercept all the fun thats
# going to happen so we can resize the thought
if abs (coords[0] - self.ul[0]) < self.sensitive:
# its near the top edge somewhere
if abs (coords[1] - self.ul[1]) < self.sensitive:
# Its in the ul corner
self.resizing = self.RESIZE_UL
self.emit ("change_mouse_cursor", gtk.gdk.TOP_LEFT_CORNER)
elif abs (coords[1] - self.lr[1]) < self.sensitive:
# Its in the ll corner
self.resizing = self.RESIZE_LL
self.emit ("change_mouse_cursor", gtk.gdk.BOTTOM_LEFT_CORNER)
elif coords[1] < self.lr[1] and coords[1] > self.ul[1]:
#anywhere else along the left edge
self.resizing = self.RESIZE_LEFT
self.emit ("change_mouse_cursor", gtk.gdk.LEFT_SIDE)
elif abs (coords[0] - self.lr[0]) < self.sensitive:
if abs (coords[1] - self.ul[1]) < self.sensitive:
# Its in the UR corner
self.resizing = self.RESIZE_UR
self.emit ("change_mouse_cursor", gtk.gdk.TOP_RIGHT_CORNER)
elif abs (coords[1] - self.lr[1]) < self.sensitive:
# Its in the lr corner
self.resizing = self.RESIZE_LR
self.emit ("change_mouse_cursor", gtk.gdk.BOTTOM_RIGHT_CORNER)
elif coords[1] < self.lr[1] and coords[1] > self.ul[1]:
#anywhere else along the right edge
self.resizing = self.RESIZE_RIGHT
self.emit ("change_mouse_cursor", gtk.gdk.RIGHT_SIDE)
elif abs (coords[1] - self.ul[1]) < self.sensitive and \
(coords[0] < self.lr[0] and coords[0] > self.ul[0]):
# Along the top edge somewhere
self.resizing = self.RESIZE_TOP
self.emit ("change_mouse_cursor", gtk.gdk.TOP_SIDE)
elif abs (coords[1] - self.lr[1]) < self.sensitive and \
(coords[0] < self.lr[0] and coords[0] > self.ul[0]):
# Along the bottom edge somewhere
self.resizing = self.RESIZE_BOTTOM
self.emit ("change_mouse_cursor", gtk.gdk.BOTTOM_SIDE)
else:
self.emit ("change_mouse_cursor", gtk.gdk.LEFT_PTR)
self.want_move = (self.resizing != self.RESIZE_NONE)
return inside
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