Tkinter: Missing the last piece of the puzzle

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  • MartinRinehart@gmail.com
    #1

    Tkinter: Missing the last piece of the puzzle

    I have a simple editor built into my visual parser. It has a File menu
    with
    typical New, Open, Save, Save As ... options. I now know how to set
    the options [en/dis]abled and how to check the Text widget's modified
    flag.

    Now I want to [en/dis]able those options. Can I ask the text to notify
    me when the modified flag changes? Can I set the statuses when the
    user clicks File, before the options are displayed? Do I need to
    create
    a checker on an independent thread that looks at the flag every few
    millis?

    (Tkinter deserves more respect. I've got a good-looking application
    growing quickly.)
    Tags: None
    • Simon Forman
      #2
      Re: Tkinter: Missing the last piece of the puzzle

      On Feb 23, 9:00 am, MartinRineh...@ gmail.com wrote:
      I have a simple editor built into my visual parser. It has a File menu
      with
      typical New, Open, Save, Save As ... options. I now know how to set
      the options [en/dis]abled and how to check the Text widget's modified
      flag.
      >
      Now I want to [en/dis]able those options. Can I ask the text to notify
      me when the modified flag changes?
      yes! check out http://aspn.activestate.com/ASPN/Coo.../Recipe/464635

      HTH,
      ~Simon
      Can I set the statuses when the
      user clicks File, before the options are displayed? Do I need to
      create
      a checker on an independent thread that looks at the flag every few
      millis?
      >
      (Tkinter deserves more respect. I've got a good-looking application
      growing quickly.)

        Comment

        • MartinRinehart@gmail.com
          #3
          Re: Tkinter: Missing the last piece of the puzzle



          Simon Forman wrote:
          yes! check out http://aspn.activestate.com/ASPN/Coo.../Recipe/464635
          >
          HTH,
          ~Simon
          Thanks, Simon. Looks like that will do it.

          Actually, it looks like that will overdo it. I'll be setting File/Save
          to enabled after every keystroke. Ideally, I'd like to set my statuses
          when the user clicks the File option or types Alt-F. This makes me
          wonder if there's a "mixin" that could find this event. Hmmm.

          Alternatively, could modify this code to NOT reset the modified flag,
          so I only get called on the first modification. Hmmm.

            Comment

            • Russell E. Owen
              #4
              Re: Tkinter: Missing the last piece of the puzzle

              In article
              <c558d504-9162-4e6e-be5a-fd7334e90375@p4 3g2000hsc.googl egroups.com>,
              MartinRinehart@ gmail.com wrote:
              Simon Forman wrote:
              yes! check out
              http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/464635


              HTH,
              ~Simon
              >
              Thanks, Simon. Looks like that will do it.
              >
              Actually, it looks like that will overdo it. I'll be setting File/Save
              to enabled after every keystroke. Ideally, I'd like to set my statuses
              when the user clicks the File option or types Alt-F. This makes me
              wonder if there's a "mixin" that could find this event. Hmmm.
              Set an internal state variables "isChanged" based on the Text callback
              and only modify the menu if the variable is set.

              It's trickier to detect "significan t" changes vs insigificant ones.
              Personally I would not bother to go that far.

              -- Russell

                Comment

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