# 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
from movableobject import MovableObject

import gtk, math, rsvg

MOON_SVG = rsvg.Handle('moon.svg')
OVAL_SVG = rsvg.Handle('oval.svg')

class AmountObject(MovableObject):
    """Draggable discrete shape."""

    def __init__(self, pos, color, shape_name, container):
        MovableObject.__init__(self)

        self.pos = pos
        
        self.selectable = True
        self.rotatable = False

        self.color = color
        
        self.shape = shape_name
        
        self.container = container
        
        self.amount_scale = 1.0
        
    def draw(self, cr):
        cr.scale(self.amount_scale, self.amount_scale)
        
        if self.shape == 'circle':
            self.draw_circle(cr, self.color)
        elif self.shape == 'square':
            self.draw_square(cr, self.color)
        else:
            self.draw_triangle(cr, self.color)
            
    def get_bounds(self):
        return (self.pos + Vector(-50, -50)).scaled(self.amount_scale),  (self.pos + Vector(50, 50)).scaled(self.amount_scale)
              
    def draw_shape(self, cr):
        # Draw the fill.
        if self.selected:
            cr.set_source_rgb(self.color[0]*1.6, self.color[1]*1.6, self.color[2]*1.6)
        else:
            cr.set_source_rgb(self.color[0], self.color[1], self.color[2])
        cr.fill_preserve()
            
        # Draw the outline.
        cr.set_source_rgb(self.color[0]*0.75, self.color[1]*0.75, self.color[2]*0.75)
        if self.selected:
            cr.set_dash((10, 10), 0)
        cr.set_line_width(4.0)
        cr.stroke()
        
    def draw_circle(self, cr, color):   
        cr.arc(self.pos.x, self.pos.y, 35, 0.0, 2.0 * math.pi)
        self.draw_shape(cr)

    def draw_square(self, cr, color):  
        square_side = 65

        cr.move_to(self.pos.x - square_side/2, self.pos.y - square_side/2)
        cr.line_to(self.pos.x + square_side/2, self.pos.y - square_side/2)
        cr.line_to(self.pos.x + square_side/2, self.pos.y + square_side/2)
        cr.line_to(self.pos.x - square_side/2, self.pos.y + square_side/2)
        cr.close_path()
        
        self.draw_shape(cr)

    def draw_triangle(self, cr, color):  
        triangle_width = 80
        triangle_height = triangle_width * math.sqrt(3)/2
        
        cr.move_to(self.pos.x, self.pos.y - triangle_height/2)
        cr.line_to(self.pos.x + triangle_width/2, self.pos.y + triangle_height/2)
        cr.line_to(self.pos.x - triangle_width/2, self.pos.y + triangle_height/2)
        cr.close_path()

        self.draw_shape(cr)