Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!ukc!acorn!RMokady
From: RMokady@acorn.co.uk (Ran Mokady)
Newsgroups: comp.sys.acorn
Subject: Re: Changing window titles
Message-ID: <4866@acorn.co.uk>
Date: 31 Jan 91 13:01:13 GMT
References: <4860@acorn.co.uk>
Sender: rmokady@acorn.co.uk
Distribution: comp
Organization: Acorn Computers Ltd, Cambridge, England
Lines: 59

In article <4860@acorn.co.uk> pcolmer@acorn.co.uk (Philip Colmer) writes:

>In article <6482@ecs.soton.ac.uk> rhh88@ecs.soton.ac.uk (Heywood RH) writes:
>
>>... I have tried changing the indirected pointer to the title to a new
>>message and then reopening the window but it does not seem to work.
>
>I think you have to close the window before reopening it. This is basically
>to force the window manager to realise that the window needs to be redraw.
>Simply reopening the window with it already on the screen won't do it. I use
>this technique and it does work.

 The way Philip describes works, but is not the correct way to do it as it
may have some undesirable effects in future versions of Risc OS. 

 The correct way to do it is:

 Change the title string.

 Call Wimp_GetWindowOutline , this gives you

      Window outline x0      (wox0)
      Window outline x1      (wox1)
      Window outline y1      (woy1)

 Call Wimp_GetWindowState , this gives you

      Work area y1           (way1)

 Call Wimp_ForceRedraw with:

    R0 = -1          ; Redraw screen area.
    R1 = wox0
    R2 = way1
    R3 = wox1
    R4 = woy1


  This may invalidate some other areas on the screen if your window is not
at the front, but since in most cases when the title changes your window is
probably at the front, this is not to bad and it is guaranteed to work
correctly in the future. 


       Ran.




                      



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