leach@neptune.oce.orst.edu (Tom Leach) (03/06/89)
Has anyone had any luck in writing a string out to a scrollable window? I've
been trying for about a week to get a large string out to a scrollable
window and I haven't gotten more then 1 line to appear.
The following is what I'm currently doing...
extern char *help; // This is the string I want to write
(defined as: char *help = "This is a really long string that"
"I want to print out in a scrolling window\n";)
//...
//...
[[helpText docView] setText:help];
[[helpText window] orderFront:self];
[[NXApp runModalFor:[helpText window]];
[[helpText window] orderOut:self];
This will get the first line of my string out to the scrollView. Unfortunatly,
It clips at the end of the docView and I haven't been able to get it to wrap
around the view. I've also tried to setCharWrap:YES but that didn't seem to
help the clipping problem. There's some stuff mentioned in ScrollView.dl, but
it redefines the word terse :-)
As one attempt to wrapping, I tried to put in newlines at the end of every few
words, then the setText just printed the string out until it came to
the first newline.
Has anyone figured this problem out yet?
Tom leach
leach@oce.orst.edu
Internet:leach@OCE.ORST.EDU UUCP:{tektronix, hp-pcd}!orstcs!leach
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Middle-of-the-road, man, it stanks. Let's run over Lionel Richie with a tank.
>>>Disclaim: It's me, not OCE.<<< B. Catt, Deathtongue. (c 1986) mrc@Tomobiki-Cho.acs.washington.edu (Mark Crispin) (03/07/89)
Here's the method I have to do what you want. It isn't very pretty,
but it does the job. I'd be happy to get any word on a better way to
do this. As a general comment, sometimes there is *too much*
documentation on the NeXT, and simple answers to simple questions get
obscured.
telemetryView is an instance variable that is set by an outlet
connected to the Scrolling TextView inside my window.
The scrolling is a bit strange. By default, the contentView will stay
at the top of the docView. What I did was take the docView's
rectangle and set its origin to its height. This creates a rectangle
that is immediately below the docView; I then scroll to make that
rectangle visible. It can't, of course, but it scrolls as close as it
can (to the bottom).
The other strange thing about the scrolling is that it scrolls before
the text is output. That's because, in the application it lives, that
there's a [mumble telemetry:"\n"]; method call after any strings it
outputs. So, the scrolling goes before so it doesn't scroll to a
blank line. A more reasonable thing may be to scroll at the end, and
make the callers output the \n before a new string instead of after.
I wanted line breaking at the end of the physical line, ignoring word
boundaries. If breaking at the nearest convenient word boundary is
what you want, remove the invocations to setNoWrap and setCharWrap:.
I used replaceSel: as an "append string to text" method, taking
advantage of the fact that no text can be selected in this window so
by default it'll just dump where the cursor is...at the end.
/* Send a string to the telemetry window
* Accepts: string
*
* This is not a very pretty function. I hope someone can tell me a better
* way to do do this.
*/
- telemetry:(char *)string
{
NXRect rect;
/* get the current bounds of this view */
[telemetryView getBounds:&rect];
/* make a rectangle of the bottommost line */
rect.origin.y = rect.size.height;
/* make sure that line can be seen */
[telemetryView scrollRectToVisible:&rect];
[telemetryView setNoWrap]; /* kill all wrapping */
/* wrap by characters */
[telemetryView setCharWrap:YES];
/* blat the string */
[telemetryView replaceSel:string];
return self;
}
--------
Mark Crispin / P.O. Box 2652 / Seattle, WA 98111-2652 / (206) 842-2385
mrc@Tomobiki-Cho.CAC.Washington.EDU / MRC@WSMR-SIMTEL20.Army.Mil
250cc Rebel pilot -- I just wind it up and it goes!
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