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Re: Starting a program from a taskwindow

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On 08/07/2011 19:03, Thomas Milius wrote:
> What is the best way to start program with WIMP interaction with parameters
> from another program running as task window?

You can't run any wimp program from within a task window. The wimp will 
get very confused and it may crash the desktop.

> The task window should pause until the child program terminates.

Task Window tasks cant suspend them selves, thats under the control of 
the task window manager (Edit, Zap, GraphTask, etc)

> Wimp_StartTask doesn't seem to work if used within a taskwindow.
>
> Filer_Run would be an alternative but doesn't allow passing parameters and
> the "parent" task would run all the time in background except I would do an
> OS_Upcall 6 to it and the child task would fill the poll word at its end. I
> also would have to allocate RMA space by the parent task (which in my case
> could be a BASIC program).

I doubt that would work.

The easiest and best option is to not to use a taskwindow, recode the 
program as wimp task working on null events from a wimp_poll idle. It is 
then free to start wimpt tasks and wait for them.

The only alternative would be to write a background monitoring wimp task 
which waited for a message from the task window task, and then launched 
a wimp application. Task window tasks can send messages, but they can't 
receive them, so to notice the child terminating you would have to use 
another mechanism such as a system variable, but this has concurrency 
issues.

---druck

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Thread

Starting a program from a taskwindow Thomas Milius <Thomas-Milius@t-online.de> - 2011-07-08 20:03 +0200
  Re: Starting a program from a taskwindow Jeremy Nicoll - news posts <jn.nntp.scrap007@wingsandbeaks.org.uk> - 2011-07-08 19:44 +0100
    Re: Starting a program from a taskwindow druck <news@druck.org.uk> - 2011-07-09 09:42 +0100
  Re: Starting a program from a taskwindow druck <news@druck.org.uk> - 2011-07-09 09:40 +0100
    Re: Starting a program from a taskwindow James Lampard <dontreplytothis@mailinator.com> - 2011-07-09 01:55 -0700
      Re: Starting a program from a taskwindow druck <news@druck.org.uk> - 2011-07-09 14:21 +0100
        Re: Starting a program from a taskwindow Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-07-13 06:07 +0200
  Re: Starting a program from a taskwindow James Lampard <dontreplytothis@mailinator.com> - 2011-07-09 01:41 -0700
    Re: Starting a program from a taskwindow Thomas Milius <Thomas-Milius@t-online.de> - 2011-07-10 11:07 +0200
  Re: Starting a program from a taskwindow Vince M Hudd <vinceh@softrock.co.uk> - 2011-07-10 11:56 +0100
  Re: Starting a program from a taskwindow "Ste (news)" <steve@revi11.plus.com> - 2011-07-11 11:34 +0100
    Re: Starting a program from a taskwindow Thomas Milius <Thomas-Milius@t-online.de> - 2011-07-11 22:26 +0200
    Re: Starting a program from a taskwindow Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-07-13 06:16 +0200
      Re: Starting a program from a taskwindow "Ste (news)" <steve@revi11.plus.com> - 2011-07-14 15:56 +0100
        Re: Starting a program from a taskwindow Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-07-16 06:38 +0200

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