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- from __future__ import print_function
- import os
- import sys
- import Queue
- import plac_core
- from Tkinter import Tk
- from ScrolledText import ScrolledText
- from plac_ext import Monitor, TerminatedProcess
-
-
- class TkMonitor(Monitor):
- """
- An interface over a dictionary {taskno: scrolledtext widget}, with
- methods add_listener, del_listener, notify_listener and start/stop.
- """
- def __init__(self, name, queue=None):
- Monitor.__init__(self, name, queue)
- self.widgets = {}
-
- @plac_core.annotations(taskno=('task number', 'positional', None, int))
- def add_listener(self, taskno):
- "There is a ScrolledText for each task"
- st = ScrolledText(self.root, height=5)
- st.insert('end', 'Output of task %d\n' % taskno)
- st.pack()
- self.widgets[taskno] = st
-
- @plac_core.annotations(taskno=('task number', 'positional', None, int))
- def del_listener(self, taskno):
- del self.widgets[taskno]
-
- @plac_core.annotations(taskno=('task number', 'positional', None, int))
- def notify_listener(self, taskno, msg):
- w = self.widgets[taskno]
- w.insert('end', msg + '\n')
- w.update()
-
- def start(self):
- 'Start the mainloop'
- self.root = Tk()
- self.root.title(self.name)
- self.root.wm_protocol("WM_DELETE_WINDOW", self.stop)
- self.root.after(0, self.read_queue)
- try:
- self.root.mainloop()
- except KeyboardInterrupt:
- print('Process %d killed by CTRL-C' % os.getpid(), file=sys.stderr)
- except TerminatedProcess:
- pass
-
- def stop(self):
- self.root.quit()
-
- def read_queue(self):
- try:
- cmd_args = self.queue.get_nowait()
- except Queue.Empty:
- pass
- else:
- getattr(self, cmd_args[0])(*cmd_args[1:])
- self.root.after(100, self.read_queue)
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