Extjs 4.2中的自定义组件的多个实例(Multiple Instances of Custom Component in Extjs 4.2)

 首先，我建议你采用面向对象的方法来分割每个组件的行为。 
 
 通过这种方式，您将拥有一个类App，您可以在其中初始化应用程序的主要组件： 
 
class App(tk.Tk):

    def __init__(self,parent):
        Tk.__init__(self,parent)
        self.parent = parent
        self.initialize()

    def initialize(self):
        ...

        ...
        # Menubar
        self.menubar = MyMenuBar(self)

        # Filemenu
        self.filemenu = MyFileMenu(self, menubar)

        # Plot
        self.plot = MyPlot(self, menubar)

        # The rest for all the other components
        ...

    def get_import_filename(self):
        # Ask the child for the filename and return it
        return self.filemenu.get_filename()
 
 然后定义每个对象： 
 
class MyPlot(tk.Menu):
      def __init__(self, parent, menubar):
           tk.Menu.__init__(self, menubar, tearoff=0)
           self.parent = parent
           self.initialize()

      def initialize(self):
          self.add_command(label="Plot My CSV File", command= self.popupgraph)  

      def popupgraph(self):
          # Ask the parent for the filename
          filename = self.parent.get_import_filename()
          # Do whatever with the filename...like open a file

class MyFileMenu(tk.Menu):
      def __init__(self, parent, menubar):
           tk.Menu.__init__(self, menubar, tearoff=0)
           self.parent = parent
           self.initialize()
      def initialize(self):
          self.add_command(label="Import a CSV File", command = file_opener)
      def file_opener(self):
          # Your file opener function goes here
          ...
          # At the end, save the imported file:
          self.filename = filename
      def get_filename(self):
          return self.filename
 
 最后，主要运行它： 
 
def main():
    app = App(None)
    app.title('Auto login')
    app.mainloop()

if __name__ == "__main__":
    main()

First of all, I would suggest you take an Object Oriented approach to split each component behaviour.
 
This way, you would have a class App, where you would initialise the main components of the app:
 
class App(tk.Tk):

    def __init__(self,parent):
        Tk.__init__(self,parent)
        self.parent = parent
        self.initialize()

    def initialize(self):
        ...

        ...
        # Menubar
        self.menubar = MyMenuBar(self)

        # Filemenu
        self.filemenu = MyFileMenu(self, menubar)

        # Plot
        self.plot = MyPlot(self, menubar)

        # The rest for all the other components
        ...

    def get_import_filename(self):
        # Ask the child for the filename and return it
        return self.filemenu.get_filename()
 
And then define every of your objects:
 
class MyPlot(tk.Menu):
      def __init__(self, parent, menubar):
           tk.Menu.__init__(self, menubar, tearoff=0)
           self.parent = parent
           self.initialize()

      def initialize(self):
          self.add_command(label="Plot My CSV File", command= self.popupgraph)  

      def popupgraph(self):
          # Ask the parent for the filename
          filename = self.parent.get_import_filename()
          # Do whatever with the filename...like open a file

class MyFileMenu(tk.Menu):
      def __init__(self, parent, menubar):
           tk.Menu.__init__(self, menubar, tearoff=0)
           self.parent = parent
           self.initialize()
      def initialize(self):
          self.add_command(label="Import a CSV File", command = file_opener)
      def file_opener(self):
          # Your file opener function goes here
          ...
          # At the end, save the imported file:
          self.filename = filename
      def get_filename(self):
          return self.filename
 
Finally, have the main to run it:
 
def main():
    app = App(None)
    app.title('Auto login')
    app.mainloop()

if __name__ == "__main__":
    main()