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From: pasturel@sctc.com (Pierre Pasturel)
Newsgroups: comp.windows.x.motif
Subject: Re: Motif 1.0 XmText problem
Keywords: XmText, marginHeight resource
Message-ID: <1990Nov21.234958.1854@sctc.com>
Date: 21 Nov 90 23:49:58 GMT
References: <1990Nov20.204225.23831@sctc.com>
Distribution: comp.window.x.motif
Organization: Secure Computing Technology Corporation
Lines: 111

I did a little more investigating.

 I created an XmText widget, as described in my earlier posting,
and after it is managed, I put the following code:

#ifdef DEBUG
 
    for ( i = 0; i<= 10; i++ ) {
        
        XtSetArg (args[0], XmNmarginHeight, i);
        XtSetValues( LOCKtoTPT_Text, args, 1);
        printf("XtSetValues set XmNmarginHeight to %d\n",i);
        XFlush(display_ptr);

        XtSetArg (args[0], XmNmarginHeight, &margin_height);
        XtGetValues( LOCKtoTPT_Text, args, 1);
        printf("XtGetValues retrieved XmNmarginHeight as %d\n",margin_height);
    }

    printf("**************\n");

    for ( i = 0; i<= 10; i++ ) {
        
        XtSetArg (args[0], XmNvalue, "testing 1 2 3" );
        XtSetValues( LOCKtoTPT_Text, args, 1);
        printf("XtSetValues set XmNvalue.\n");
        XFlush(display_ptr);

        XtSetArg (args[0], XmNmarginHeight, &margin_height);
        XtGetValues( LOCKtoTPT_Text, args, 1);
        printf("XtGetValues retrieved XmNmarginHeight as %d\n",margin_height);
    }

#endif


where LOCKtoTPT_Text is a XmText widget.

and I get the following output:

XtSetValues set XmNmarginHeight to 0
XtGetValues retrieved XmNmarginHeight as 8
XtSetValues set XmNmarginHeight to 1
XtGetValues retrieved XmNmarginHeight as 9
XtSetValues set XmNmarginHeight to 2
XtGetValues retrieved XmNmarginHeight as 10
XtSetValues set XmNmarginHeight to 3
XtGetValues retrieved XmNmarginHeight as 11
XtSetValues set XmNmarginHeight to 4
XtGetValues retrieved XmNmarginHeight as 12
XtSetValues set XmNmarginHeight to 5
XtGetValues retrieved XmNmarginHeight as 13
XtSetValues set XmNmarginHeight to 6
XtGetValues retrieved XmNmarginHeight as 14
XtSetValues set XmNmarginHeight to 7
XtGetValues retrieved XmNmarginHeight as 15
XtSetValues set XmNmarginHeight to 8
XtGetValues retrieved XmNmarginHeight as 16
XtSetValues set XmNmarginHeight to 9
XtGetValues retrieved XmNmarginHeight as 17
XtSetValues set XmNmarginHeight to 10
XtGetValues retrieved XmNmarginHeight as 18
**************
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 26
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 34
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 42
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 50
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 58
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 66
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 74
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 82
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 90
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 98
XtSetValues set XmNvalue.
XtGetValues retrieved XmNmarginHeight as 106

There seems to be two things going wrong here. First, XtGetValues is
retrieving a value 8 bigger than the value set by XtSetValues.

But my main conern is in the second loop, where
the setting of the XmNValue resource appears
to effect the marginHeight value retrieved by XtGetValues(). 
Funny thing, though, is that there is no effect on the appearence of the XmText
widget (i.e., the distance between the top and bottom border of the 
text widget and the text itself does not reflect the every increasing
marginHeight resource value).

Seems to me that there is a problem with the X Toolkit XtGetValues??

The only reason that this whole thing is a problem for me is that eventually
I get all these X toolkit messages warning me that my margin height has to
be >= 0. All these warnings slow down my motif application program 
simulation and it does not look good.

I tried countering this problem by always resetting the marginHeight resource
anytime I changed XmNvalue using XtSetValues. But this resulted in the 
XmText text flickering too much on the screen.


Pierre
pasturel@sctc.com