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Re: TaskWindow -txt &xxxxxxxx

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In message <4e9d8c5b$0$32484$e4fe514c@dreader21.news.xs4all.nl>
          Erik G <erikg@noname.invalid> wrote:

> On 15-10-2011 13:13, druck wrote:
>> On 13/10/2011 10:23, Erik G wrote:
>>> Question remains: How exactly does the child read the value of the -txt
>>> parameter that was passed to the TaskWindow command?
>> 
>> Define child. There are up to 4 actors:-
>> 
>> 1) The TaskWindow module
>> 2) Initiator - who or what issues *TaskWindow
>> 3) Handler   - a wimp task which provides the window for taskwindow
>> output, can be the same as (2)
>> 4) The taskwindow task spawned by (1) when it receives (2)

> That would be "Child" as defined on the first page of the TaskWindow
> chapter of the PRM (page 3-321). As you correctly surmised, this would
> be (4).

> Although... there does not seem to be a distinction made there between
> the task that is started by the WimpStartTask(TaskWindow) call, which
> has a task handle, runs from code in the TaskWindow module and sends
> messages to and receives messages from the Parent (which is (3) in this
> context) on the one hand, and the command-line program which is started
> with the "command" parameter of the TaskWindow command, runs its own
> code in its own memory space and whose I/O is intercepted by that task
> and converted to messages.

There is no distinction because there is only one task. The TaskWindow 
command starts the command-line program *as* a task. The TaskWindow 
module calls Wimp_Poll on its behalf to allow it to multitask, 
intercepts its output and sends messages on its behalf.

-- 
Martin
---------------------------------------------------------------------
Martin Wuerthner         MW Software      http://www.mw-software.com/
        RISC OS Software for Design, Printing and Publishing
---------------------------------------------------------------------

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TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-09-27 21:41 +0100
  Re: TaskWindow -txt &xxxxxxxx Martin Wuerthner <spamtrap@mw-software.com> - 2011-09-27 23:08 +0200
    Re: TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-09-27 22:33 +0100
    Re: TaskWindow -txt &xxxxxxxx "Ste (news)" <steve@revi11.plus.com> - 2011-09-28 15:27 +0100
      Re: TaskWindow -txt &xxxxxxxx Martin Wuerthner <spamtrap@mw-software.com> - 2011-09-28 17:16 +0200
        Re: TaskWindow -txt &xxxxxxxx "Ste (news)" <steve@revi11.plus.com> - 2011-09-28 19:52 +0100
          Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-09-30 06:02 +0200
        Re: TaskWindow -txt &xxxxxxxx druck <news@druck.org.uk> - 2011-10-02 16:13 +0100
          Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-10-13 11:23 +0200
            Re: TaskWindow -txt &xxxxxxxx Alex Macfarlane Smith <nospam@archifishal.co.uk> - 2011-10-13 21:08 +0100
            Re: TaskWindow -txt &xxxxxxxx druck <news@druck.org.uk> - 2011-10-15 12:13 +0100
              Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-10-18 16:25 +0200
                Re: TaskWindow -txt &xxxxxxxx Martin Wuerthner <spamtrap@mw-software.com> - 2011-10-19 10:45 +0200
    Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-09-30 05:47 +0200
      Re: TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-09-30 22:38 +0100
        Re: TaskWindow -txt &xxxxxxxx Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-10-01 05:49 +0200
          Re: TaskWindow -txt &xxxxxxxx Martin Wuerthner <spamtrap@mw-software.com> - 2011-10-01 13:19 +0200
        Re: TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-10-01 20:20 +0100
          Re: TaskWindow -txt &xxxxxxxx Steve Fryatt <news@stevefryatt.org.uk> - 2011-10-01 20:51 +0100
            Re: TaskWindow -txt &xxxxxxxx Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-10-01 22:46 +0200
              Re: TaskWindow -txt &xxxxxxxx Steve Fryatt <news@stevefryatt.org.uk> - 2011-10-01 22:07 +0100
              Re: TaskWindow -txt &xxxxxxxx Steve Fryatt <news@stevefryatt.org.uk> - 2011-10-01 22:04 +0100
              Re: TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-10-01 22:45 +0100
            Re: TaskWindow -txt &xxxxxxxx Dave Higton <davehigton@dsl.pipex.com> - 2011-10-01 22:44 +0100
          Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-10-18 15:23 +0200
            Re: TaskWindow -txt &xxxxxxxx Erik G <erikg@noname.invalid> - 2011-10-18 15:55 +0200
            Re: TaskWindow -txt &xxxxxxxx druck <news@druck.org.uk> - 2011-10-19 20:27 +0100
  Re: TaskWindow -txt &xxxxxxxx Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-10-14 07:53 +0200
    Re: TaskWindow -txt &xxxxxxxx Gavin Wraith <gavin@wra1th.plus.com> - 2011-10-14 11:43 +0100
      Re: TaskWindow -txt &xxxxxxxx Martin Wuerthner <spamtrap@mw-software.com> - 2011-10-14 13:26 +0200
        Re: TaskWindow -txt &xxxxxxxx Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-10-15 20:37 +0200
    Re: TaskWindow -txt &xxxxxxxx druck <news@druck.freeuk.com> - 2011-10-16 18:26 +0100
      Re: TaskWindow -txt &xxxxxxxx Stewart Brodie <stewart.brodie@ntlworld.com> - 2011-10-16 23:28 +0100
        Re: TaskWindow -txt &xxxxxxxx druck <news@druck.org.uk> - 2011-10-19 20:30 +0100

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