Questions on inherited Text object in a ScrollView

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4 total messages Started by Gordie Freedman Thu, 08 Oct 1992 02:37

#1304

Author: Gordie Freedman
Date: Thu, 08 Oct 1992 02:37

46 lines
2811 bytes

I am trying to get a text object inside of a ScrollView to behave in
a custom way. I think the only way to do this is to subclass it, 
override the methods I want to modify, and of course add some instance
variables to use. I know how to do this, but I can't figure out how to
get IB to make a .nib with a window containing a ScrollView containing
my inherited CText object. I have some other related questions also.


More explicitly:

I want to override keyDown and mouseDown so that I can get control and perform
some checking on these events. I also want to override the methods for 
underline and the alignment methods so I can change the X in the upper right
corner of the window to indicate the document needs saving. I can't seem to
get these to the delegate, although I know how to get messages to the
delegate for textDidGetKeys:isEmpty: (This doesn't report changes
due to underline, alignment, etc). I also couldn't figure out how to set
a Text object's delegate from within IB, I had to do it manually from in 
the init routine of the .nib's owner.


So here are my questions:

 1) Can I set the Text object's delegate from within IB? (Using ctrl-mouse-drag).

 2) How can I set an object outlet variable to a ScrollView object
	from within IB (it always sets it to the Text object within the
	ScrollView). I'm trying to do this so I can create a normal ScrollView
	from within IB and than in the init code of the .nib's owner I can
	do a setDocument (I think that is the call) on the ScrollView. I need to
	set one of the "file's owner" object's instance variables to the ScrollView
	so I can reference the ScrollView later. (On a related note, can I get
	the ScrollView from the Window object, which I can connect)?

 3) How can I use IB to set up a ScrollView containing my inherited CText
	object, rather than the Text object it usually contains? I started
	reading about Palettes, but I'm not sure if this is the way to go.

 4) Is there some way for the Text object's delegate to get notification
	when the alignment or underline attribute is changed? (I think I also
	don't get color changes either, so I need that too).

Thanks in advance, 

Gordie Freedman
gordie@kaleida.com

Re: Questions on inherited Text object in a ScrollView

#1349

Author: Ray Spalding
Date: Thu, 08 Oct 1992 21:14

28 lines
1819 bytes

In article <73182@apple.Apple.COM> gordie@duts.ccc.amdahl.com writes:
> 3) How can I use IB to set up a ScrollView containing my inherited CText
>	object, rather than the Text object it usually contains? I started
>	reading about Palettes, but I'm not sure if this is the way to go.

Rather than use the scrolling text palette object, try this:
Drag in a CustomView from the Views palette.  Change the class
of the CustomView to your CText subclass.  Then, choose
"Group in ScrollView" from the "Layout" menu.

> 1) Can I set the Text object's delegate from within IB?

If you set things up as above, this should be no problem.
Just select the ScrollView, then double-click your CText View.
"delegate" should appear in the Connections inspector.

> 2) How can I set an object outlet variable to a ScrollView object
>	from within IB (it always sets it to the Text object within the
>	ScrollView).

I had no trouble with this.  Just be careful where you drag to.
As you control-drag into the ScrollView, first the ScrollView itself
will be highlighted; release here to connect to it.  If you continue
dragging, the Text object becomes highlighted.
-- 
Ray Spalding, Office of Information Technology
Georgia Institute of Technology, Atlanta Georgia, 30332-0715
Internet: ray.spalding@oit.gatech.edu (NeXT Mail accepted)

Re: Questions on inherited Text object in a ScrollView

#1350

Author: Ray Spalding
Date: Thu, 08 Oct 1992 21:29

15 lines
1187 bytes

In article <70514@hydra.gatech.EDU> cc100aa@xray.gatech.edu (Ray Spalding) writes:
>In article <73182@apple.Apple.COM> gordie@duts.ccc.amdahl.com writes:
>> 1) Can I set the Text object's delegate from within IB?
>Just select the ScrollView, then double-click your CText View.
>"delegate" should appear in the Connections inspector.

Oops ... "delegate" does appear, but I can't seem to connect it
up by control-dragging.

The solution is to connect the delegate before you
Group it in the ScrollView.
-- 
Ray Spalding, Office of Information Technology
Georgia Institute of Technology, Atlanta Georgia, 30332-0715
Internet: ray.spalding@oit.gatech.edu (NeXT Mail accepted)

Re: Questions on inherited Text object in a ScrollView

#1356

Author: Juan Collas
Date: Thu, 08 Oct 1992 23:50

53 lines
2468 bytes

In article <73182@apple.Apple.COM> gordie@duts.ccc.amdahl.com (Gordie  
Freedman) writes:
> 
> So here are my questions:
> 
>  1) Can I set the Text object's delegate from within IB? (Using  
ctrl-mouse-drag).
> 

I don't think so.  I've just done it at runtime in my class.  Would be  
nice ...

>  2) How can I set an object outlet variable to a ScrollView object
> 	from within IB (it always sets it to the Text object within the
> 	ScrollView). I'm trying to do this so I can create a normal  
ScrollView
> 	from within IB and than in the init code of the .nib's owner I can
> 	do a setDocument (I think that is the call) on the ScrollView. I  
need to
> 	set one of the "file's owner" object's instance variables to the  
ScrollView
> 	so I can reference the ScrollView later. (On a related note, can I  
get
> 	the ScrollView from the Window object, which I can connect)?
> 

Easy.  Control-Drag from the object to the edge of the scrollview.  You  
should see a black line encompassing the scoller and text object.  That's  
the scrollview.  If you move into the text object, only it will have a  
black line around it and the scroller will be excluded.  That's the text  
object itself.

>  3) How can I use IB to set up a ScrollView containing my inherited  
CText
> 	object, rather than the Text object it usually contains? I started
> 	reading about Palettes, but I'm not sure if this is the way to go.
> 

It's the way to go.  Otherwise, you'll have to replace the default Text  
object with your CText object at runtime.

>  4) Is there some way for the Text object's delegate to get notification
> 	when the alignment or underline attribute is changed? (I think I  
also
> 	don't get color changes either, so I need that too).
> 

Sorry, can't help you there.  The documentation isn't too clear on  
attributes and the 'touched' button.

--

	- Juan Collas, ICTV

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