Tkinter 例子

#!/usr/bin/env python

import pylab
from pylab import *
import Tkinter
from Tkinter import *
import serial
from numpy  import *
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg


root = Tkinter.Tk()
root.wm_title("Chocolate Oscilloscope (By Wenzhe_Qiu)")


xAchse=pylab.arange(0,100,1)
yAchse=pylab.array([0]*100)

fig = pylab.figure(1)
ax = fig.add_subplot(111)
ax.grid(True)
ax.set_title("Chocolate Oscilloscope Frontend (COM4)")
ax.set_xlabel("Time (ms)")
ax.set_ylabel("Amplitude (V)")
ax.axis([0,100,-1.5,1.5])
line1=ax.plot(xAchse,yAchse,'-')
canvas = FigureCanvasTkAgg(fig, master=root)
canvas.show()
canvas.get_tk_widget().pack(side=Tkinter.TOP, fill=Tkinter.BOTH, expand=1)

toolbar = NavigationToolbar2TkAgg( canvas, root )
toolbar.update()
canvas._tkcanvas.pack(side=Tkinter.TOP, fill=Tkinter.BOTH, expand=1)


values=[]
values = [0 for x in range(100)]
run=1


sampling_freq=1000
sampling_time=float(1000/float(sampling_freq))
NumberSamples=100

  
#s=serial.Serial(port='COM4')  #open port COM4
s=serial.Serial(port='COM4', baudrate=115200)



#Receive data by pc.putc()
def waveformGenerator():
  global values
  _next=s.readline()
  _next=float(_next)/1000
  if(run==1):
    if(_next<=1):
     _next=3.3 * _next
     values.append(_next)
  root.after(0,waveformGenerator)

  


#def RealtimePloter():
#  global values,wScale,NumberSamples,sampling_time
#  NumberSamples=min(len(values),wScale.get())
#  real_time=NumberSamples*sampling_time;
#  interval=sampling_time
#  CurrentXAxis=linspace(0,real_time,NumberSamples)
#  line1[0].set_data(CurrentXAxis,pylab.array(values[-NumberSamples:]))
#  ax.axis([0,real_time,-0.5,4])
#  canvas.draw()
#  root.after(25,RealtimePloter)

def RealtimePloter():
  global values,wScale,sampling_freq,interval
  NumberSamples=min(len(values),wScale.get()*sampling_freq/1000)
  interval=float(float (wScale.get())/float (NumberSamples))
  CurrentXAxis=linspace(0,wScale.get(),NumberSamples) 
  line1[0].set_data(CurrentXAxis,pylab.array(values[-NumberSamples:]))

  ax.axis([0,wScale.get(),-0.5,4])
  canvas.draw()
  root.after(25,RealtimePloter)
 

def _quit():
    print "Bye"
    s.close()       # close the port
    root.quit()     # stops mainloop
    root.destroy()  # this is necessary on Windows to prevent
                    # Fatal Python Error: PyEval_RestoreThread: NULL tstate

def _set():
    global sampling_time
    s.write(str(wScale_sample_freq.get())+'\n')
    sampling_freq=wScale_sample_freq.get()
    sampling_time=float(float(1/float(sampling_freq))*1000)
    print "The current sampling frequency is " + str(wScale_sample_freq.get()) + "Hz !"
    print "The sampling time interval is " + str(sampling_time) + " ms" 
    

def _PS():
    s.write("2000\n")

def _STOP_IMAGE():
  global run
  run=~run

def _channel_change_to_15():
    s.write("1010\n")
    print"The current channel is 15 !"

def _channel_change_to_16():
    s.write("1020\n")
    print"The current channel is 16 !"

def _channel_change_to_17():
    s.write("1030\n")
    print"The current channel is 17 !"

def _channel_change_to_18():
    s.write("1040\n")
    print"The current channel is 18 !"

def _channel_change_to_19():
    s.write("1050\n")
    print"The current channel is 19 !"

def _channel_change_to_20():
    s.write("1060\n")
    print"The current channel is 20 !"

########## frame_widget_definition #########
frame_1 = Frame(height=10, bd=1, relief=SUNKEN)
frame_2 = Frame(height=10, bd=1, relief=GROOVE)
frame_3 = Frame(master=frame_2, height=10, bd=1, relief=GROOVE)
#relief:Border decoration. The default is FLAT. Other possible values are SUNKEN, RAISED, GROOVE, and RIDGE
#frame widget reference:http://effbot.org/tkinterbook/frame.htm
frame_1.pack(side=Tkinter.LEFT)
frame_2.pack(side=Tkinter.RIGHT)
frame_3.pack(side=Tkinter.BOTTOM)

########## button_widget_definition #########
button = Tkinter.Button(master=frame_3, text='  SET  ', command=_set)
button_PS = Tkinter.Button(master=frame_3, text=' PAUSE/START CHANNEL ', command=_PS)
button_SI = Tkinter.Button(master=frame_3, text='    STOP/RUN IMAGE   ', command=_STOP_IMAGE)
button_quit = Tkinter.Button(master=frame_3, text='  QUIT  ', command=_quit)
button.pack(side=Tkinter.LEFT)
button_PS.pack(side=Tkinter.LEFT)
button_SI.pack(side=Tkinter.LEFT)
button_quit.pack(side=Tkinter.RIGHT)

########## wScale_widget_definition #########
wScale = Tkinter.Scale(master=frame_2,label="Time Scale (ms):", from_=1, to=1000,sliderlength=30,length=ax.get_frame().get_window_extent().width, orient=Tkinter.HORIZONTAL)
wScale_sample_freq = Tkinter.Scale(master=frame_2,label="Sampling Frequency (Hz): (Click SET button for comfirmation)", from_=3, to=1000,sliderlength=30,length=ax.get_frame().get_window_extent().width, orient=Tkinter.HORIZONTAL)
wScale.pack(side=Tkinter.TOP)
wScale_sample_freq.pack(side=Tkinter.TOP)
wScale.set(500)
wScale_sample_freq.set(1000)

########## radiobutton_widget_definition #########
v = IntVar()
v.set(1)
print "The default channel is 15 !"

Radiobutton(frame_1, text="Channel 15", variable=v, value=1, command=_channel_change_to_15).pack(anchor=W)
Radiobutton(frame_1, text="Channel 16", variable=v, value=2, command=_channel_change_to_16).pack(anchor=W)
Radiobutton(frame_1, text="Channel 17", variable=v, value=3, command=_channel_change_to_17).pack(anchor=W)
Radiobutton(frame_1, text="Channel 18", variable=v, value=4, command=_channel_change_to_18).pack(anchor=W)
Radiobutton(frame_1, text="Channel 19", variable=v, value=5, command=_channel_change_to_19).pack(anchor=W)
Radiobutton(frame_1, text="Channel 20", variable=v, value=6, command=_channel_change_to_20).pack(anchor=W)
# radiobutton widget reference:http://effbot.org/tkinterbook/radiobutton.htm




root.after(100,waveformGenerator)
root.after(100,RealtimePloter)
Tkinter.mainloop()