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# Copyright 2008 by Peter Moxhay and Wade Brainerd.
# This file is part of Math.
#
# Math 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 3 of the License, or
# (at your option) any later version.
#
# Math 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 Math. If not, see <http://www.gnu.org/licenses/>.
from objectarea import Object
from vector import Vector
import gtk
from droporiginobject import DropOriginObject
from symbolobject import SymbolObject
class SignsOriginObject(DropOriginObject):
"""Rectangular area that is a source of draggable signs."""
def __init__(self, pos, container, drop_targets):
DropOriginObject.__init__(self, pos, Vector(80, 320), container)
self.drop_targets = drop_targets
self.ltsymbol = SymbolObject(Vector(0, 0), '<', self.drop_targets, self.container, size=80)
self.ltsymbol.drop_origin = self
self.ltsymbol.use_minimum_width_and_height = True
self.eqsymbol = SymbolObject(Vector(100, 0), '=', self.drop_targets, self.container, size=80)
self.eqsymbol.drop_origin = self
self.eqsymbol.use_minimum_width_and_height = True
self.gtsymbol = SymbolObject(Vector(200, 0), '>', self.drop_targets, self.container, size=80)
self.gtsymbol.drop_origin = self
self.gtsymbol.use_minimum_width_and_height = True
self.ltsymbol.drag_type = None
self.ltsymbol.selected = False
self.ltsymbol.selectable = True
self.ltsymbol.dragged = False
self.ltsymbol.draggable = True
self.eqsymbol.drag_type = None
self.eqsymbol.selected = False
self.eqsymbol.selectable = True
self.eqsymbol.dragged = False
self.eqsymbol.draggable = True
self.gtsymbol.drag_type = None
self.gtsymbol.selected = False
self.gtsymbol.selectable = True
self.gtsymbol.dragged = False
self.gtsymbol.draggable = True
self.add_object(self.ltsymbol)
self.add_object(self.eqsymbol)
self.add_object(self.gtsymbol)
self.background_visible = True
def reset(self):
self.ltsymbol.move(self.pos + Vector(0, 0))
self.eqsymbol.move(self.pos + Vector(100, 0))
self.gtsymbol.move(self.pos + Vector(200, 0))
self.ltsymbol.drag_type = None
self.ltsymbol.selectable = True
self.ltsymbol.dragged = False
self.ltsymbol.draggable = True
self.ltsymbol.moving_by_key_press = False
self.eqsymbol.drag_type = None
self.eqsymbol.selectable = True
self.eqsymbol.dragged = False
self.eqsymbol.draggable = True
self.eqsymbol.moving_by_key_press = False
self.gtsymbol.drag_type = None
self.gtsymbol.selectable = True
self.gtsymbol.dragged = False
self.gtsymbol.draggable = True
self.gtsymbol.moving_by_key_press = False
# Adjust tabbing order.
if self.container:
#self.container.select_object(self.ltsymbol)
self.container.adjust_tab_order()
def remove_contents(self):
self.ltsymbol.drag_type = None
self.ltsymbol.selected = False
self.ltsymbol.selectable = False
self.ltsymbol.dragged = False
self.ltsymbol.draggable = False
self.eqsymbol.drag_type = None
self.eqsymbol.selected = False
self.eqsymbol.selectable = False
self.eqsymbol.dragged = False
self.eqsymbol.draggable = False
self.gtsymbol.drag_type = None
self.gtsymbol.selected = False
self.gtsymbol.selectable = False
self.gtsymbol.dragged = False
self.gtsymbol.draggable = False
self.ltsymbol.move(Vector(10000, 10000))
self.eqsymbol.move(Vector(10000, 10000))
self.gtsymbol.move(Vector(10000, 10000))
self.remove_object(self.ltsymbol)
self.remove_object(self.eqsymbol)
self.remove_object(self.gtsymbol)
def draw(self, cr):
pass
def get_bounds(self):
return self.pos, self.pos + self.size
def draw_background(self, cr):
if not self.background_visible:
return
text = '<'
pos = Vector(850, 750)
cr.set_source_rgb(0, 0, 0)
cr.set_font_size(80)
x_bearing, y_bearing, width, height = cr.text_extents(text)[:4]
cr.move_to(pos.x - x_bearing - width/2, pos.y - y_bearing - height/2)
cr.show_text(text)
text = '='
pos = Vector(950, 750)
cr.set_source_rgb(0, 0, 0)
cr.set_font_size(80)
x_bearing, y_bearing, width, height = cr.text_extents(text)[:4]
cr.move_to(pos.x - x_bearing - width/2, pos.y - y_bearing - height/2)
cr.show_text(text)
text = '>'
pos = Vector(1050, 750)
cr.set_source_rgb(0, 0, 0)
cr.set_font_size(80)
x_bearing, y_bearing, width, height = cr.text_extents(text)[:4]
cr.move_to(pos.x - x_bearing - width/2, pos.y - y_bearing - height/2)
cr.show_text(text)
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