# 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)