我看过，但没有找到足够具体的问题，如果重复这一点，那就很抱歉。 目标：通过pylab的pcolor绘制的不同矩阵数据不断更新图形的GUI，以便运行动画。但是用户应该能够通过Tkinter小部件按钮播放，暂停，停止动画。
在我使用set_array（），draw（）和canvas.manager.after（）...得到matplotlib的答案之前，我有工作代码可以让我开始动画，但我无法弄清楚如何当只使用matplotlib功能时停止或暂停它，所以我决定使用Tkinter straigt而不是matplotlib的Tcl / Tk包装器。这里是工作代码只是为了踢，但万一有人有任何想法。但继续提出真正的问题。
# mouse click the "Play" button widget to play animation
# PROBLEMS:
# 1. can't pause or stop animation. once loop starts it cant be broken
# 2. set_array attribute for pcolor PolyCollection object only updates the matrix
# C of pcolor, however for my actual application, I will be using pcolor(x,y,C)
# and will have new x,y, and C per plot. Unlike line object, where set_xdata and
# set_ydata are used, I can't find an analogy to pcolor. If I were updating an
# image I could use set_data(x,y,C), but i am not importing an image. I assume
# pcolor is still my best bet unless (as in Matlab) there is an equivalent
# image(x,y,C) function?
import time as t
from pylab import *
from matplotlib.widgets import Button
ion()
def pressPlay(event):
#fig=figure()
ax = subplot(111)
subplots_adjust(bottom=0.2)
c=rand(5,5)
cplot=pcolor(c)
draw()
for i in range(5):
c=rand(5,5)
cplot.set_array(c.ravel())
cplot.autoscale()
title('Ionosphere '+str(i+1))
t.sleep(3)
draw()
axPlay = axes([0.7, 0.05, 0.1, 0.075])
bPlay = Button(axPlay, 'Play')
bPlay.on_clicked(pressPlay)
顺便说一下：在导入pylab时，TkAgg后端会自动设置为在matplotlib中使用......我想。或者以某种方式我自动使用TkAgg。我正在运行Linux，Python 2.6.4，Ipython 0.10。
我操纵了从Daniweb IT讨论社区找到的代码，以便使用Tkinter和update_idletasks（）函数，我可以播放，播放，停止更改标签小部件的颜色。只要安装了Tkinter，就可以在python上单独运行。没有使用matplotlib或pylab。这是工作代码和我质疑的最终代码的主干。
# This is meant to draw Start and Stop buttons and a label
# The Start button should start a loop in which the label
# is configured to change color by looping through a color list.
# At each pass through the loop the variable self.stop is checked:
# if True the loop terminates.
# The Stop button terminates the loop by setting the
# variable self.stop to True.
# The Start button restarts the animation from the beginning
# if Stop was hit last, or restarts the animation from where it left off
# if pause was hit last.
# The loop also terminates on the last color of the list, as if stop were hit
from Tkinter import *
colors = ['red','green','blue','orange','brown','black','white','purple','violet']
numcol=len(colors)
class SGWidget(Frame):
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.top_frame = Frame(bg='green')
self.top_frame.grid()
# enter event loop until all idle callbacks have been called.
self.top_frame.update_idletasks()
self.makeToolbar()
# construct a label widget with the parent frame top_frame
self.label = Label(self.top_frame,text = 'Text',bg='orange')
self.label.grid()
# initialize (time index t)
self.t=0
def makeToolbar(self):
self.toolbar_text = ['Play','Pause','Stop']
self.toolbar_length = len(self.toolbar_text)
self.toolbar_buttons = [None] * self.toolbar_length
for toolbar_index in range(self.toolbar_length):
text = self.toolbar_text[toolbar_index]
bg = 'yellow'
button_id = Button(self.top_frame,text=text,background=bg)
button_id.grid(row=0, column=toolbar_index)
self.toolbar_buttons[toolbar_index] = button_id
def toolbar_button_handler(event, self=self, button=toolbar_index):
return self.service_toolbar(button)
# bind mouse click on start or stop to the toolbar_button_handler
button_id.bind("<Button-1>", toolbar_button_handler)
# call blink() if start and set stop when stop
def service_toolbar(self, toolbar_index):
if toolbar_index == 0:
self.stop = False
print self.stop
self.blink()
elif toolbar_index == 1:
self.stop = True
print self.stop
elif toolbar_index == 2:
self.stop = True
print self.stop
self.t=0
# while in start, check if stop is clicked, if not, call blink recursivly
def blink(self):
if not self.stop:
print 'looping',self.stop
self.label.configure(bg=colors[self.t])
self.t += 1
if self.t == numcol: # push stop button
self.service_toolbar(2)
self.label.update_idletasks()
self.after(500, self.blink)
if __name__ == '__main__':
SGWidget().mainloop()
然后，在matplotlib示例embedding_in_tk.html，http://matplotlib.sourceforge.net/examples/user_interfaces/embedding_in_tk.html的帮助下，我操纵了前面的代码来动画连接到pcolor图形的画布。但是，使用canvas.get_tk_widget（）更新画布并不能实现我所假设的技巧，因为它之前的命令重新绘制了pcolor（）。所以我猜我每次重新绘制时都必须重新连接画布和图形？但我不知道怎么做。我希望我使用update_idletasks（）???
进入正确的轨道所以，使用下面的代码，当代码循环播放时，我看到的是相同的图，而不是更新的数字？这是我的主要问题和疑问。
from pylab import *
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from Tkinter import *
colors=[None]*10
for i in range(len(colors)):
colors[i]=rand(5,5)
#colors = ['red','green','blue','orange','brown','black','white','purple','violet']
numcol=len(colors)
class App(Frame):
def __init__(self,parent=None):
Frame.__init__(self,parent)
self.top=Frame()
self.top.grid()
self.top.update_idletasks()
self.makeWidgets()
self.makeToolbar()
def makeWidgets(self):
# figsize (w,h tuple in inches) dpi (dots per inch)
#f = Figure(figsize=(5,4), dpi=100)
self.f = Figure()
self.a = self.f.add_subplot(111)
self.a.pcolor(rand(5,5))
# a tk.DrawingArea
self.canvas = FigureCanvasTkAgg(self.f, master=self.top)
self.canvas.get_tk_widget().grid(row=3,column=0,columnspan=3)
self.bClose = Button(self.top, text='Close',command=self.top.destroy)
self.bClose.grid()
#self.label = Label(self.top, text = 'Text',bg='orange')
#self.label.grid()
# initialize (time index t)
self.t=0
def makeToolbar(self):
self.toolbar_text = ['Play','Pause','Stop']
self.toolbar_length = len(self.toolbar_text)
self.toolbar_buttons = [None] * self.toolbar_length
for toolbar_index in range(self.toolbar_length):
text = self.toolbar_text[toolbar_index]
bg = 'yellow'
button_id = Button(self.top,text=text,background=bg)
button_id.grid(row=0, column=toolbar_index)
self.toolbar_buttons[toolbar_index] = button_id
def toolbar_button_handler(event, self=self, button=toolbar_index):
return self.service_toolbar(button)
button_id.bind("<Button-1>", toolbar_button_handler)
# call blink() if start and set stop when stop
def service_toolbar(self, toolbar_index):
if toolbar_index == 0:
self.stop = False
print self.stop
self.blink()
elif toolbar_index == 1:
self.stop = True
print self.stop
elif toolbar_index == 2:
self.stop = True
print self.stop
self.t=0
# while in start, check if stop is clicked, if not, call blink recursivly
def blink(self):
if not self.stop:
print 'looping',self.stop
self.a.pcolor(colors[self.t])
#draw()
#self.label.configure(bg=colors[self.t])
self.t += 1
if self.t == numcol: # push stop button
self.service_toolbar(2)
self.canvas.get_tk_widget().update_idletasks()
#self.label.update_idletasks()
self.after(500, self.blink)
#root = Tk()
app=App()
app.mainloop()
感谢您的帮助！
答案 0 :(得分：2)
在闪烁功能中，在调用空闲任务之前添加self.canvas.show()：
self.canvas.show() # insert this line
self.canvas.get_tk_widget().update_idletasks()