Python的：如何获取进度的start（）从一个窗口（类）其他信息(Python: How to

没有与菜单和进度主窗口。 与OK按钮的对应窗口在菜单命令打开和确定按钮开始处理（这里：3秒睡眠）。 通过从我这里没有提供的类继承创建的对应窗口（如果需要的答案，请让我知道）。 该方法apply和ok覆盖现有的母亲类的方法。

现在我的问题：由于进度坐在主窗口（类APP）和progressbar(start)和progressbar(stop)通过母亲类tkSimpleDialog.Dialog在对应的窗口，我无论如何都必须通过（开始）和（停止）类应用。 所以我想我也覆盖__init__(self..)方法，提供self. 对进度。

我怎样才能使这项工作？

import Tkinter, ttk, tkFileDialog, tkSimpleDialog, time, threading

class App:
  def __init__(self, master, progressbar):
    self.progress_line(master)

  def progress_line (self, master):
    self.progressbar = ttk.Progressbar(master, mode='indeterminate')
    self.progressbar.place(anchor = 'ne', height = "20", width = "150", x = "175", y = "30")

class AppMenu(object):

  def __init__(self, master, progressbar):
    self.master = master
    self.menu_bar()

  def menu_bar(self):
    menu_bar = Tkinter.Menu(self.master)
    self.menu_bar = Tkinter.Menu(self.master)
    self.master.config(menu=self.menu_bar)
    self.create_menu = Tkinter.Menu(self.menu_bar, tearoff = False)
    self.create_menu.add_command(label = "do", command = self.do)
    self.menu_bar.add_cascade(label = "now", menu = self.create_menu)

  def do(self):
    do1 = Dialog(self.master, progressbar)    

class Dialog(tkSimpleDialog.Dialog):

  def __init__(self, parent, progressbar):

    tkSimpleDialog.Dialog.__init__(self, parent, progressbar)
    self.transient(parent)

    self.parent = parent
    self.result = None

    self.progressbar = progressbar

    body = Frame(self)
    self.initial_focus = self.body(body)
    body.pack(padx=5, pady=5)

    self.buttonbox()
    self.grab_set()

    if not self.initial_focus:
        self.initial_focus = self

    self.protocol("WM_DELETE_WINDOW", self.cancel)
    self.geometry("+%d+%d" % (parent.winfo_rootx()+50, parent.winfo_rooty()+50))
    self.initial_focus.focus_set()
    self.wait_window(self)

  def ok(self, event=None):
    self.withdraw()
    self.start_foo_thread()
    self.cancel()
  def apply(self):
    time.sleep(5)

  def start_foo_thread(self):
    global foo_thread
    self.foo_thread = threading.Thread(target=self.apply)
    self.foo_thread.daemon = True
    self.progressbar.start()
    self.foo_thread.start()
    master.after(20, check_foo_thread)

  def check_foo_thread(self):
    if self.foo_thread.is_alive():
        root.after(20, self.check_foo_thread)
    else:
        self.progressbar.stop()    

master = Tkinter.Tk()
progressbar = None
app = App(master, progressbar)
appmenu = AppMenu(master, progressbar)
master.mainloop()

错误信息：首先单击确定后：

Exception in Tkinter callback
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1410, in __call__
  File "ask-progressbar.py", line 57, in ok
    self.start_foo_thread()
  File "ask-progressbar.py", line 66, in start_foo_thread
    self.progressbar.start()
AttributeError: Dialog2 instance has no attribute 'progressbar'

第二：关闭应用后

Exception in Tkinter callback
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1410, in __call__
  File "ask-progressbar.py", line 26, in do
    do1 = Dialog2(self.master, progressbar)
  File "ask-progressbar.py", line 33, in __init__
    self.transient(parent)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1652, in wm_transient
TclError: can't invoke "wm" command:  application has been destroyed

Answer 1:

下面是你的代码的工作版本。 有一些问题，我不得不解决，因为你并没有将代码从我的回答改变了一些东西，你的其他问题有关progressbars。

答案在这里你的主要问题基本上是，你必须通过周围的实例，并记住它在必要时所涉及的各种类的实例，以使他们的方法将它可通过self的说法，当他们需要它。 此外，您试图获得并重写的方式tkSimpleDialog.Dialog基类的方法是既过于复杂和不正确的为好。

通常是最好的（最简单的）事情做的仅仅是提供自己validate()和apply()方法，因为这是它是如何设计的工作。 如果您还需要你自己的__init__()构造函数，它只能传递参数，它从一个在子类中了解到的基类的方法是很重要的。 如果你需要更多的功能，它通常可以通过附加的派生类唯一方法提供的，只有它和其他类，您还创建了了解。

总之，这里是我最终-了：

import Tkinter, ttk, tkFileDialog, tkSimpleDialog, time, threading

class App:
    def __init__(self, master):
        self.progress_line(master)

    def progress_line(self, master):
        # the value of "maximum" determines how fast progressbar moves
        self._progressbar = ttk.Progressbar(master, mode='indeterminate', 
                                            maximum=4) # speed of progressbar
        self._progressbar.place(anchor='ne', height="20", width="150", 
                                x="175", y="30")
    @property
    def progressbar(self):
        return self._progressbar # return value of private member

class AppMenu(object):
  def __init__(self, master, progressbar):
      self.master = master
      self.menu_bar()
      self.progressbar = progressbar

  def menu_bar(self):
      self.menu_bar = Tkinter.Menu(self.master)
      self.master.config(menu=self.menu_bar)
      self.create_menu = Tkinter.Menu(self.menu_bar, tearoff=False)
      self.create_menu.add_command(label="do", command=self.do)
      self.menu_bar.add_cascade(label="now", menu=self.create_menu)

  def do(self):
      Dialog(self.master, self.progressbar) # display the dialog box

class Dialog(tkSimpleDialog.Dialog):
    def __init__(self, parent, progressbar):
        self.progressbar = progressbar
        tkSimpleDialog.Dialog.__init__(self, parent, title="Do foo?")

    def apply(self):
        self.start_foo_thread()

    # added dialog methods...
    def start_foo_thread(self):
        self.foo_thread = threading.Thread(target=self.foo)
        self.foo_thread.daemon = True
        self.progressbar.start()
        self.foo_thread.start()
        master.after(20, self.check_foo_thread)

    def check_foo_thread(self):
        if self.foo_thread.is_alive():
            master.after(20, self.check_foo_thread)
        else:
            self.progressbar.stop()

    def foo(self): # some time-consuming function...
        time.sleep(3)


master = Tkinter.Tk()
master.title("Foo runner")
app = App(master)
appmenu = AppMenu(master, app.progressbar)
master.mainloop()

希望这可以帮助。

Answer 2:

这里还有一个更简单的解决方案，它不需要使用线程的 - 因此可能会更容易使用/适应你的情况。 它的耗时过程调用进度widget的update_idletasks（）方法多次foo()函数。 再次，它说明了如何通过周围的进度给需要它的代码的各个部分。

import Tkinter, ttk, tkFileDialog, tkSimpleDialog, time

class App:
    def __init__(self, master):
        self.progress_line(master)

    def progress_line(self, master):
        self._progressbar = ttk.Progressbar(master, mode='indeterminate')
        self._progressbar.place(anchor='ne', height="20", width="150", 
                                x="175", y="30")
    @property
    def progressbar(self):
        return self._progressbar # return value of private member

class AppMenu(object):
    def __init__(self, master, progressbar):
        self.master = master
        self.menu_bar()
        self.progressbar = progressbar

    def menu_bar(self):
        self.menu_bar = Tkinter.Menu(self.master)
        self.master.config(menu=self.menu_bar)
        self.create_menu = Tkinter.Menu(self.menu_bar, tearoff=False)
        self.create_menu.add_command(label="do foo", command=self.do_foo)
        self.menu_bar.add_cascade(label="now", menu=self.create_menu)

    def do_foo(self):
        confirm = ConfirmationDialog(self.master, title="Do foo?")
        self.master.update() # needed to completely remove conf dialog
        if confirm.choice:
            foo(self.progressbar)

class ConfirmationDialog(tkSimpleDialog.Dialog):
    def __init__(self, parent, title=None):
        self.choice = False
        tkSimpleDialog.Dialog.__init__(self, parent, title=title)

    def apply(self):
        self.choice = True

def foo(progressbar):
    progressbar.start()
    for _ in range(50):
        time.sleep(.1) # simulate some work
        progressbar.step(10)
        progressbar.update_idletasks()
    progressbar.stop()

master = Tkinter.Tk()
master.title("Foo runner")
app = App(master)
appmenu = AppMenu(master, app.progressbar)
master.mainloop()

文章来源: Python: How to get progressbar start() info from one window (class) to other