#!/usr/bin/env python
# as planet1.py, but here we add functionality for dragging the
# planets around in the canvas
import Tkinter, Pmw
import math, copy, time
from scitools.CanvasCoords import CanvasCoords
C = CanvasCoords() # transformation object
# default values
C.set_coordinate_system(400, 800, 200, 200)
from model1 import *
class Planet:
def __init__(self, x, y, radius=10, color='red', canvas=None):
self.x = x
self.y = y
# current physical center coordinates
self.rc = radius
# radius in canvas coords
self.r = float(radius / C.xy_scale)
# radius in physical coords
self.color = color
self.id = 0
# ID as returned from create_oval
if canvas is not None:
self.draw(canvas)
def draw(self, canvas):
