#coding: utf-8
"""
XRC is an XML-based resource format for wxPython.  With it you can
define the layout of widgets, and then load that XRC at runtime to
create the layout.  There are several GUI designers available that
understand the XRC format, a simple one called XRCed comes with
wxPython.
"""

import wx
import threading
import random


class WorkerThread(threading.Thread):
    """
    This just simulates some long-running task that periodically sends
    a message to the GUI thread.
    """
    ### TODO: в качестве окна принимаешь self = MyFrame
    def __init__(self, threadNum, window):
        threading.Thread.__init__(self)
        self.threadNum = threadNum
        self.window = window
        self.timeToQuit = threading.Event()
        self.timeToQuit.clear()
        self.messageCount = random.randint(10, 20)
        self.messageDelay = 0.1 + 2.0 * random.random()

    def stop(self):
        self.timeToQuit.set()

    def run(self):
        msg = "Thread %d iterating %d times with a delay of %1.4f\n" \
              % (self.threadNum, self.messageCount, self.messageDelay)
        wx.CallAfter(self.window.LogMessage, msg)

        for i in range(1, self.messageCount + 1):
            self.timeToQuit.wait(self.messageDelay)
            if self.timeToQuit.isSet():
                break
            msg = "Message %d from thread %d\n" % (i, self.threadNum)
            ### TODO: Добавляем в текстовое поле сообщение
            wx.CallAfter(self.window.LogMessage, msg)
        else:
            wx.CallAfter(self.window.ThreadFinished, self)


class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Multi-threaded GUI")
        self.threads = []
        self.count = 0

        panel = wx.Panel(self)
        startBtn = wx.Button(panel, -1, "Start a thread")
        stopBtn = wx.Button(panel, -1, "Stop all threads")
        self.tc = wx.StaticText(panel, -1, "Worker Threads: 00")
        self.log = wx.TextCtrl(panel, -1, "",
                               style=wx.TE_RICH | wx.TE_MULTILINE)

        inner = wx.BoxSizer(wx.HORIZONTAL)
        inner.Add(startBtn, 0, wx.RIGHT, 15)
        inner.Add(stopBtn, 0, wx.RIGHT, 15)
        inner.Add(self.tc, 0, wx.ALIGN_CENTER_VERTICAL)
        main = wx.BoxSizer(wx.VERTICAL)
        main.Add(inner, 0, wx.ALL, 5)
        main.Add(self.log, 1, wx.EXPAND | wx.ALL, 5)
        panel.SetSizer(main)

        self.Bind(wx.EVT_BUTTON, self.OnStartButton, startBtn)
        self.Bind(wx.EVT_BUTTON, self.OnStopButton, stopBtn)
        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)

        self.UpdateCount()

    def OnStartButton(self, evt):
        self.count += 1
        ### TODO: в качестве self передавать себя, т.е. окно 
        thread = WorkerThread(self.count, self)
        self.threads.append(thread)
        self.UpdateCount()
        thread.start()

    def OnStopButton(self, evt):
        self.StopThreads()
        self.UpdateCount()

    def OnCloseWindow(self, evt):
        self.StopThreads()
        self.Destroy()

    def StopThreads(self):
        while self.threads:
            thread = self.threads[0]
            thread.stop()
            self.threads.remove(thread)

    def UpdateCount(self):
        self.tc.SetLabel("Worker Threads: %d" % len(self.threads))

    def LogMessage(self, msg):
        self.log.AppendText(msg)

    def ThreadFinished(self, thread):
        self.threads.remove(thread)
        self.UpdateCount()


app = wx.App()
frm = MyFrame()
frm.Show()
app.MainLoop()