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Re: HELP with IDL widget_text values [message #537]

Tue, 01 September 1992 08:37

benell
Messages: 7
Registered: September 1992

Junior Member

In article <87523@netnews.upenn.edu> mark@ginger.biophys.upenn.edu (Mark Elliott) writes:
>
> I have an IDL text widget (scrollable) which has lines appended to it
> during the course of a program. The line I use looks like:
>
> WIDGET_CONTROL, TXTWID, SET_VALUE = LINES, /APPEND
>
> The problem is that as the newly added lines of text are added,
> the widget's scroll window is not adjusted to make the new lines visible.
> Consequently, the user has no idea that new text is there. Is there any way
> to keep the text widget's view window on the bottom most line?
>

About the easiest way to do this is to "set" the value of the text
widget to its old value with the new line added to the bottom. Idl will
then "recompute" the size of the scroll bar. This would be done as follows:

WIDGET_CONTROL, TXTWIN, GET_VALUE = BUFFER ;Get the current text values

BUFFER = [BUFFER, LINES] ;Append the new lines to the value array.

WIDGET_CONTROL, TXTWIN, SET_VALUE = BUFFER ;Set text with values

This should do the trick. -K

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		Re: HELP with IDL widget_text values By: benell on Tue, 01 September 1992 08:37
		Re: HELP with IDL widget_text values By: strebel on Mon, 31 August 1992 20:43

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