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40773Re: menu halts program

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  • ross_harper512
    May 1, 2010
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      Hi Stefan

      Thanks for the reply. I don't know what you mean by "a separate thread". Could you clarify?

      Ross

      --- In libertybasic@yahoogroups.com, "Stefan Pendl" <pendl2megabit@...> wrote:
      >
      > >
      > > Hi,
      > >
      > > This is the second time I've tried to post this query. It
      > > didn't seem to appear, so apologies if it does appear twice.
      > >
      > > I have a continuous graphing program which has a a menu bar.
      > > The main loop of the program is something like:
      > >
      > > Do
      > > Scan
      > > Loop until 1=0
      > >
      > > When the menu is accessed (or in fact, any windows dialogue
      > > box like FILEDIALOG is brought up) the program halts the loop
      > > until the menu is closed again, then the loop continues.
      > >
      > > Has anyone else experienced this? Is this a limitation of
      > > LB, or is there some workaround?
      > >
      > >
      > > Many thanks,
      > > Ross
      > >
      >
      > Instead of using a loop you can use a TIMER to update the graph.
      >
      > The basic structure would be:
      >
      > '...
      >
      > [StartTimerLoop]
      > ' first turn timer off, so we can do our work without getting interrupted
      > TIMER 0
      >
      > '...
      >
      > TIMER 100, [StartTimerLoop]
      >
      > '...
      >
      > The advantage is, that you can turn off the constant update of the graph from anywhere in your program by issuing a "TIMER 0"
      > command.
      >
      > To have the update of the graph being fully independent from the GUI user interaction, one would have to create a separate thread
      > for the graph update procedure, but this currently not possible with LB.
      >
      > ---
      > Stefan Pendl
      >
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