class MyGUI:
def __init__(self, reps=3):
self.reps = reps # uses default Tk root
self.text = ScrolledText() # save widget as state
self.text.pack()
threadChecker(self.text) # start thread check loop
self.text.bind('<Button-1>', # 3.x need list for map, range ok
lambda event: list(map(self.onEvent, range(6))) )
def onEvent(self, i): # code that spawns thread
myname = 'thread-%s' % i
startThread(
action = self.threadaction,
args = (i, ),
context = (myname,),
onExit = self.threadexit,
onFail = self.threadfail,
onProgress = self.threadprogress)
# thread's main action
def threadaction(self, id, progress): # what the thread does
for i in range(self.reps): # access to object state here
time.sleep(1)
if progress: progress(i) # progress callback: queued
if id % 2 == 1: raise Exception # odd numbered: fail
# thread callbacks: dispatched off queue in main thread
def threadexit(self, myname):
self.text.insert('end', '%s\texit\n' % myname)
self.text.see('end')
def threadfail(self, exc_info, myname): # have access to self state
self.text.insert('end', '%s\tfail\t%s\n' % (myname, exc_info[0]))
self.text.see('end')
def threadprogress(self, count, myname):
self.text.insert('end', '%s\tprog\t%s\n' % (myname, count))
self.text.see('end')
self.text.update() # works here: run in main thread
def threadaction(id, reps, progress): # what the thread does
for i in range(reps):
time.sleep(1)
if progress: progress(i) # progress callback: queued
if id % 2 == 1: raise Exception # odd numbered: fail
# thread exit/progress callbacks: dispatched off queue in main thread
def threadexit(myname):
text.insert('end', '%s\texit\n' % myname)
text.see('end')
def threadfail(exc_info, myname):
text.insert('end', '%s\tfail\t%s\n' % (myname, exc_info[0]))
text.see('end')
def threadprogress(count, myname):
text.insert('end', '%s\tprog\t%s\n' % (myname, count))
text.see('end')
text.update() # works here: run in main thread
# make enclosing GUI and start timer loop in main thread
# spawn batch of worker threads on each mouse click: may overlap
text = ScrolledText()
text.pack()
threadChecker(text) # start thread loop in main thread
text.bind(
'<Button-1>', # 3.x need list for map, range ok
lambda event: list(map(onEvent, range(6))))
text.mainloop() # pop-up window, enter tk event loop
def producer(id):
for i in range(5):
time.sleep(0.1)
print('put')
dataQueue.put('[producer id=%d, count=%d]' % (id, i))
def consumer(root):
try:
print('get')
data = dataQueue.get(block=False)
except queue.Empty:
pass
else:
root.insert('end', 'consumer got => %s\n' % str(data))
root.see('end')
root.after(250, lambda: consumer(root)) # 4 times per sec
def makethreads():
for i in range(4):
_thread.start_new_thread(producer, (i,))
if __name__ == '__main__':
# main GUI thread: spawn batch of worker threads on each mouse click
from Tkinter.scrolledtext import ScrolledText
root = ScrolledText()
root.pack()
root.bind('<Button-1>', lambda event: makethreads())
consumer(root) # start queue check loop in main thread
root.mainloop() # pop-up window, enter tk event loop
# thread's main action
def threadaction(id, reps, progress): # what the thread does
for i in range(reps):
time.sleep(1)
if progress: progress(i) # progress callback: queued
if id % 2 == 1: raise Exception # odd numbered: fail
# thread exit/progress callbacks: dispatched off queue in main thread
def threadexit(myname):
text.insert('end', '%s\texit\n' % myname)
text.see('end')
def threadfail(exc_info, myname):
text.insert('end', '%s\tfail\t%s\n' % (myname, exc_info[0]))
text.see('end')
def threadprogress(count, myname):
text.insert('end', '%s\tprog\t%s\n' % (myname, count))
text.see('end')
text.update() # works here: run in main thread
# make enclosing GUI and start timer loop in main thread
# spawn batch of worker threads on each mouse click: may overlap
text = ScrolledText()
text.pack()
threadChecker(text) # start thread loop in main thread
text.bind('<Button-1>', # 3.x need list for map, range ok
lambda event: list(map(onEvent, range(6))) )
text.mainloop() # pop-up window, enter tk event loop
