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From: gourdol@imag.imag.fr (Gourdol Arnaud)
Newsgroups: comp.sys.mac.programmer
Subject: Re: writing to a window without selecting it.
Message-ID: <20240@imag.imag.fr>
Date: 9 Apr 91 10:45:37 GMT
References: <1991Apr9.034248.6761@hub.cs.jmu.edu>
Organization: IMAG Institute, University of Grenoble, France
Lines: 25

In article <1991Apr9.034248.6761@hub.cs.jmu.edu> jmidili@hub.cs.jmu.edu (jeff midili) writes:
>Lots of programs like MacDraw, MacDraft, etc have a small window
>seperate of the main image window that displays the x,y coordinates
>of the mouse pointer withen the image.  I have written a program
>that displays a pix image, and now I want to add the small window that
>will display the x,y coordinates of the mouse when it is in the 
>window.  I can do it now, but only by selecting the coordwindow during
>each NULL event and drawstringing the coordinates in the coordwindow.
>The problem with this is that for each NULL event I Select the coord-
>window, draw in it, and then Select my image window.  This creates
>unsightly flickering in each window.  

Don't select the window, just switch the grafPorts:

SetPort(coordWindow);
DrawString(...);
SetPort(mainWindow);

Arno.

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