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|
#! /usr/bin/python
# -*- coding:utf-8 -*-
THREADED = True
import Tkinter
import math
import time
from gui_threads import *
class States:
"""folds state into variable just to track typos you get using raw string"""
def __init__(self, name):
self._name = name
def __str__(self):
return self._name
st_init = States('init')
st_pause = States('pause')
st_run = States('run')
st_quit = States('quit')
ObjectProperties = {
# x y dx dy color
1 : [ 50, 100, 5, 30, "red"],
2 : [150, 100, 5, 30, "green"],
3 : [250, 100, 5, 30, "blue"],
4 : [350, 100, 5, 30, "black"],
}
class Rectangle(object):
def __init__(self, canvas, x, y, dx, dy, color):
self.xy = [(x, y), (x + dx, y), (x + dx, y + dy), (x, y + dy) ]
self.drawn_item = canvas.create_polygon(self.xy, fill=color)
self.center = complex( x + dx / 2, y + dy / 2)
self.arc = 0
self._step = (math.pi * 2) / 50
self.canvas = canvas
def rotate(self, **kwds):
""" rotate polygons by self._step
normally called in threads context"""
if THREADED:
gui_call = kwds.pop('gui_call')
"""compute angle and rotate each point of the polygon around its center
"""
self.arc += self._step
if self.arc >= math.pi * 2:
self.arc = 0
angle = complex(math.cos(self.arc), math.sin(self.arc))
newxy = []
for x, y in self.xy:
v = angle * (complex(x, y) - self.center) + self.center
newxy.append(v.real)
newxy.append(v.imag)
"""send command for execution in gui_mainloop context"""
if THREADED:
gui_call(Command(self.canvas.coords, self.drawn_item, *newxy))
else:
self.canvas.coords(self.drawn_item, *newxy)
"""prepare for next iteration"""
class GuiObject(GuiClient):
#not THREADED:class GuiObject():
button_names = ['start', 'pause', 'restart', 'quit']
NORMAL = Tkinter.NORMAL
DISABLED = Tkinter.DISABLED
buttons_state = dict(
init = [ NORMAL, DISABLED, DISABLED, DISABLED ],
start = [ DISABLED, NORMAL, DISABLED, NORMAL ],
pause = [ DISABLED, DISABLED, NORMAL, NORMAL ],
restart = [ DISABLED, NORMAL, DISABLED, NORMAL ],
quit = [ DISABLED, DISABLED, DISABLED, DISABLED ],
)
class GuiButton:
def __init__(self, frame, name, command, row, column):
self._button = Tkinter.Button(frame,
text="%s %d" % (name, row),
command=command)
self._button.grid(row=row, column=column)
def set_state(self, state):
self._button.config(state=state)
def set_buttons_state(self, b_event):
b_states = self.buttons_state[b_event]
for k, button_name in enumerate(self.button_names):
self.buttons[button_name].set_state(b_states[k])
def __init__(self, gui_server, name_id, frame, canvas, props):
#not THREADED: def __init__(self, name_id, frame, canvas, props):
if THREADED:
GuiClient.__init__(self, gui_server) # déclare client du server
self._frame = frame
self._name_id = name_id
self._canvas = canvas
self.buttons = dict()
row = name_id #TODO: name_id should not be same as row
for column, name in enumerate(self.button_names):
self.buttons[name] = GuiObject.GuiButton(frame, name,
getattr(self, 'command_%s' % name),
row, column)
self.rectangle = Rectangle(canvas, *props)
self.set_buttons_state('init')
self.state = st_init
def command_start(self):
assert self.state in [ st_init ]
if THREADED:
self.thread_start()
self.set_buttons_state('start')
self.state = st_run
def command_quit(self):
if THREADED:
self.thread_quit()
self.set_buttons_state('quit')
self.state = st_quit
def command_pause(self):
assert self.state in [ st_run ]
if self.state == st_run:
if THREADED:
self.thread_pause()
self.set_buttons_state('pause')
self.state = st_pause
def command_restart(self):
assert self.state in [ st_pause ]
if self.state == st_pause:
if THREADED:
self.thread_restart()
self.set_buttons_state('restart')
self.state = st_run
def visit_method(self, **kwds):
"""method called by thread.run
kwds should contains gui_call
"""
if THREADED:
gui_call = kwds.pop('gui_call')
self.rectangle.rotate(gui_call=gui_call)
else:
self.rectangle.rotate()
time.sleep(0.02)
gui_objects = dict()
quit_event = False
def on_delete_window():
global quit_event
if THREADED:
quit_event = True
for o in gui_objects.itervalues():
if o.state != st_quit:
o.command_quit()
sys.exit()
POLL_TIME = 200 # assume Ms
def server_poller(**kwds):
poll_timer = kwds.pop('poll_timer')
if THREADED:
poller_callback = kwds.pop('poller_callback')
gui_root = kwds.pop('gui_root')
def poller_routine():
global quit_event
if THREADED:
quit_event = poller_callback()
else:
for o in gui_objects.itervalues():
if o.state == st_run:
o.visit_method()
if not quit_event:
gui_root.after(poll_timer, poller_routine)
poller_routine()
if __name__ == "__main__":
root = Tkinter.Tk()
root.title('Objets tournants avec threads - v04')
root.geometry('700x200')
root.protocol("WM_DELETE_WINDOW", on_delete_window)
canvas = Tkinter.Canvas(root, bg="white")
canvas.pack(side=Tkinter.LEFT, expand=Tkinter.YES, fill=Tkinter.BOTH)
frame = Tkinter.Frame(root)
if THREADED:
gui_server = GuiServer(root,
poll_timer=POLL_TIME,
server_poller=server_poller) # start server
for id, props in ObjectProperties.iteritems(): # start clients
print "props= %s" % props
if THREADED:
gui_objects[id] = GuiObject(gui_server, id, frame, canvas, props)
else:
gui_objects[id] = GuiObject(id, frame, canvas, props)
frame.pack(side=Tkinter.RIGHT)
if not THREADED:
server_poller(poll_timer=POLL_TIME, gui_root=root)
root.mainloop() |
