# 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/>.

DEBUG = False

from objectarea import Object
from draggableobject import DraggableObject
from vector import Vector

import gtk

class LineSegmentObject(DraggableObject):
    """Draggable vertical line segment."""

    def __init__(self, pos, length, drop_targets, container):
        DraggableObject.__init__(self)

        self.pos = pos
        self.length = length
        if self.length == 200:
            self.line_segment_length = 162
        else:
            self.line_segment_length = self.length
        
        self.selectable = True
        self.rotatable = False
        
        self.drop_target = None
        
        self.drop_targets = drop_targets
        self.container = container
    
    def draw(self, cr):
        #cr.set_source_rgb(1, 0, 1)
        #self_bounds_mn, self_bounds_mx = self.get_bounds()
        #cr.rectangle(self_bounds_mn.x, self_bounds_mn.y, self_bounds_mx.x - self_bounds_mn.x, self_bounds_mx.y - self_bounds_mn.y)
        #cr.fill()
        
        cr.move_to(self.pos.x - 25, self.pos.y + self.length - self.line_segment_length)
        cr.line_to(self.pos.x + 25, self.pos.y+ self.length - self.line_segment_length)
        
        cr.move_to(self.pos.x - 25, self.pos.y + self.length)
        cr.line_to(self.pos.x + 25, self.pos.y + self.length)
        
        cr.move_to(self.pos.x, self.pos.y + self.length - self.line_segment_length)
        cr.line_to(self.pos.x, self.pos.y + self.length)
        
        if self.dragged:
            # The line segment gets transparent when dragged.
            cr.set_source_rgba(0, 0, 0, 0.5)
        else:
            # Otherwise, it's black.
            cr.set_source_rgb(0, 0, 0)
            
        cr.set_line_width(8.0)
        
        cr.stroke()
         
        if self.selected:
            cr.rectangle(self.pos.x - 30, self.pos.y - 10 + self.length - self.line_segment_length, 60, self.line_segment_length + 20)
            
            cr.set_line_width(1.0)
            
            # Draw a different dashed outline if the object is not only selected but dragged.
            if self.dragged or self.moving_by_key_press:
                    cr.set_dash((2, 2, 0))
            else:
                cr.set_dash((10, 10), 0)
                
            cr.set_source_rgb(0, 0, 0)
            cr.stroke()
            
    def get_bounds(self):
        mn = Vector(self.pos.x - 30, self.pos.y - 10 + self.length - self.line_segment_length)
        mx = mn + Vector(60, self.line_segment_length + 20)
        return mn, mx