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#!/usr/bin/env python3
import sys
import os
from tkinter import *
from idlelib.Percolator import Percolator
from idlelib.ColorDelegator import ColorDelegator
from idlelib.textView import view_file # TextViewer
from importlib import reload
import turtle
import time
demo_dir = os.path.dirname(os.path.abspath(__file__))
STARTUP = 1
READY = 2
RUNNING = 3
DONE = 4
EVENTDRIVEN = 5
menufont = ("Arial", 12, NORMAL)
btnfont = ("Arial", 12, 'bold')
txtfont = ('Lucida Console', 8, 'normal')
def getExampleEntries():
return [entry[:-3] for entry in os.listdir(demo_dir) if
entry.endswith(".py") and entry[0] != '_']
help_entries = ( # (help_label, help_file)
('Turtledemo help', "demohelp.txt"),
('About turtledemo', "about_turtledemo.txt"),
('About turtle module', "about_turtle.txt"),
)
class DemoWindow(object):
def __init__(self, filename=None):
self.root = root = turtle._root = Tk()
root.title('Python turtle-graphics examples')
root.wm_protocol("WM_DELETE_WINDOW", self._destroy)
root.grid_rowconfigure(1, weight=1)
root.grid_columnconfigure(0, weight=1)
root.grid_columnconfigure(1, minsize=90, weight=1)
root.grid_columnconfigure(2, minsize=90, weight=1)
root.grid_columnconfigure(3, minsize=90, weight=1)
self.mBar = Frame(root, relief=RAISED, borderwidth=2)
self.ExamplesBtn = self.makeLoadDemoMenu()
self.OptionsBtn = self.makeHelpMenu()
self.mBar.tk_menuBar(self.ExamplesBtn, self.OptionsBtn)
self.mBar.grid(row=0, columnspan=4, sticky='news')
pane = PanedWindow(orient=HORIZONTAL, sashwidth=5,
sashrelief=SOLID, bg='#ddd')
pane.add(self.makeTextFrame(pane))
pane.add(self.makeGraphFrame(pane))
pane.grid(row=1, columnspan=4, sticky='news')
self.output_lbl = Label(root, height= 1, text=" --- ", bg="#ddf",
font=("Arial", 16, 'normal'), borderwidth=2,
relief=RIDGE)
self.start_btn = Button(root, text=" START ", font=btnfont,
fg="white", disabledforeground = "#fed",
command=self.startDemo)
self.stop_btn = Button(root, text=" STOP ", font=btnfont,
fg="white", disabledforeground = "#fed",
command=self.stopIt)
self.clear_btn = Button(root, text=" CLEAR ", font=btnfont,
fg="white", disabledforeground="#fed",
command = self.clearCanvas)
self.output_lbl.grid(row=2, column=0, sticky='news', padx=(0,5))
self.start_btn.grid(row=2, column=1, sticky='ew')
self.stop_btn.grid(row=2, column=2, sticky='ew')
self.clear_btn.grid(row=2, column=3, sticky='ew')
Percolator(self.text).insertfilter(ColorDelegator())
self.dirty = False
self.exitflag = False
if filename:
self.loadfile(filename)
self.configGUI(NORMAL, DISABLED, DISABLED, DISABLED,
"Choose example from menu", "black")
self.state = STARTUP
def onResize(self, event):
cwidth = self._canvas.winfo_width()
cheight = self._canvas.winfo_height()
self._canvas.xview_moveto(0.5*(self.canvwidth-cwidth)/self.canvwidth)
self._canvas.yview_moveto(0.5*(self.canvheight-cheight)/self.canvheight)
def makeTextFrame(self, root):
self.text_frame = text_frame = Frame(root)
self.text = text = Text(text_frame, name='text', padx=5,
wrap='none', width=45)
self.vbar = vbar = Scrollbar(text_frame, name='vbar')
vbar['command'] = text.yview
vbar.pack(side=LEFT, fill=Y)
self.hbar = hbar = Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
hbar['command'] = text.xview
hbar.pack(side=BOTTOM, fill=X)
text['font'] = txtfont
text['yscrollcommand'] = vbar.set
text['xscrollcommand'] = hbar.set
text.pack(side=LEFT, fill=BOTH, expand=1)
return text_frame
def makeGraphFrame(self, root):
turtle._Screen._root = root
self.canvwidth = 1000
self.canvheight = 800
turtle._Screen._canvas = self._canvas = canvas = turtle.ScrolledCanvas(
root, 800, 600, self.canvwidth, self.canvheight)
canvas.adjustScrolls()
canvas._rootwindow.bind('<Configure>', self.onResize)
canvas._canvas['borderwidth'] = 0
self.screen = _s_ = turtle.Screen()
turtle.TurtleScreen.__init__(_s_, _s_._canvas)
self.scanvas = _s_._canvas
turtle.RawTurtle.screens = [_s_]
return canvas
def configGUI(self, menu, start, stop, clear, txt="", color="blue"):
self.ExamplesBtn.config(state=menu)
self.start_btn.config(state=start)
if start == NORMAL:
self.start_btn.config(bg="#d00")
else:
self.start_btn.config(bg="#fca")
self.stop_btn.config(state=stop)
if stop == NORMAL:
self.stop_btn.config(bg="#d00")
else:
self.stop_btn.config(bg="#fca")
self.clear_btn.config(state=clear)
self.clear_btn.config(state=clear)
if clear == NORMAL:
self.clear_btn.config(bg="#d00")
else:
self.clear_btn.config(bg="#fca")
self.output_lbl.config(text=txt, fg=color)
def makeLoadDemoMenu(self):
CmdBtn = Menubutton(self.mBar, text='Examples',
underline=0, font=menufont)
CmdBtn.pack(side=LEFT, padx="2m")
CmdBtn.menu = Menu(CmdBtn)
for entry in getExampleEntries():
def loadexample(x):
def emit():
self.loadfile(x)
return emit
CmdBtn.menu.add_command(label=entry, underline=0,
font=menufont, command=loadexample(entry))
CmdBtn['menu'] = CmdBtn.menu
return CmdBtn
def makeHelpMenu(self):
CmdBtn = Menubutton(self.mBar, text='Help', underline=0, font=menufont)
CmdBtn.pack(side=LEFT, padx='2m')
CmdBtn.menu = Menu(CmdBtn)
for help_label, help_file in help_entries:
def show(help_label=help_label, help_file=help_file):
view_file(self.root, help_label, os.path.join(demo_dir, help_file))
CmdBtn.menu.add_command(label=help_label, font=menufont, command=show)
CmdBtn['menu'] = CmdBtn.menu
return CmdBtn
def refreshCanvas(self):
if not self.dirty: return
self.screen.clear()
self.dirty=False
def loadfile(self, filename):
self.refreshCanvas()
modname = 'turtledemo.' + filename
__import__(modname)
self.module = sys.modules[modname]
with open(self.module.__file__, 'r') as f:
chars = f.read()
self.text.delete("1.0", "end")
self.text.insert("1.0", chars)
self.root.title(filename + " - a Python turtle graphics example")
reload(self.module)
self.configGUI(NORMAL, NORMAL, DISABLED, DISABLED,
"Press start button", "red")
self.state = READY
def startDemo(self):
self.refreshCanvas()
self.dirty = True
turtle.TurtleScreen._RUNNING = True
self.configGUI(DISABLED, DISABLED, NORMAL, DISABLED,
"demo running...", "black")
self.screen.clear()
self.screen.mode("standard")
self.state = RUNNING
try:
result = self.module.main()
if result == "EVENTLOOP":
self.state = EVENTDRIVEN
else:
self.state = DONE
except turtle.Terminator:
self.state = DONE
result = "stopped!"
if self.state == DONE:
self.configGUI(NORMAL, NORMAL, DISABLED, NORMAL,
result)
elif self.state == EVENTDRIVEN:
self.exitflag = True
self.configGUI(DISABLED, DISABLED, NORMAL, DISABLED,
"use mouse/keys or STOP", "red")
def clearCanvas(self):
self.refreshCanvas()
self.screen._delete("all")
self.scanvas.config(cursor="")
self.configGUI(NORMAL, NORMAL, DISABLED, DISABLED)
def stopIt(self):
if self.exitflag:
self.clearCanvas()
self.exitflag = False
self.configGUI(NORMAL, NORMAL, DISABLED, DISABLED,
"STOPPED!", "red")
turtle.TurtleScreen._RUNNING = False
else:
turtle.TurtleScreen._RUNNING = False
def _destroy(self):
self.root.destroy()
def main():
demo = DemoWindow()
demo.root.mainloop()
if __name__ == '__main__':
main()
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