Re: [Java-gnome-developer] Word wrap in a CellRenderText

[Joao V. <jvi...@ya...>]

Hmmmm

Here's a quick hack: if you put <br> tags, it'll break lines... but of course it won't be as
dynamic as you want :P

So... the *real* solution to your problem, i believe, would be this: write a custom cell renderer.
Now that's the challenge: how hard is it to write a custom cell renderer with JG? Maybe JG should
provide some base class for custom cell renderers (*hint hint*).

Here's a C tutorial on how to write custom cell renderers:
http://scentric.net/tutorial/sec-custom-cell-renderers.html#sec-custom-cell-renderer-example

Cheers,
J.V.


 --- Andrew Cowie <an...@op...> escreveu: 
> Hey there,
> 
> I'm in the process of using a simple single-column ListStore backed
> TreeView to display a summarized version of some data, and I'm having a
> little trouble fine tuning the rendering - I need word wrap.
> 
> As some of you know, I'm working on something which, broadly stated,
> involves displaying XML data. This particular window is a high level
> summary, which simplifies navigation around the more specific details of
> the document in other windows. As such, I've just read in selected XML
> nodes, and composed a single string - with Pango markup - for display in
> the TreeView widget.
> 
> Pango obviously provides for wrapping text in Labels; and likewise
> TreeView (care of TreeViewColumn and CellRendererText.Attribute.MARKUP)
> provides for displaying text with pango markup, so text of 
> 
>                 This is <big>some huge</big> text, and <span
>                 size=small>this is small</span>
> 
> works. The trouble is that there's no markup code (that I can find) for
> word wrap.
> 
> I looked up the GNOME manual, and Labels definitely have a wrap
> property, and java-gnome lets you at it with Label.setLineWrap(true).
> However, the text cells in a TreeView are not Labels, even though the
> same pango engine is used to render them.
> 
> CellRendererText has a method called setAttributes(AttrList attr). That
> seems to be the way to Pango, but when I look at the org.gnu.pango
> classes, I can't figure out how to create the Attribute objects which it
> uses.
> 
> Within org.gnu.pango there's a Layout class, which has
> setWrapStyle(WrapMode.WORD), but I can't figure out how to get to
> Attribute from Layout, or vice versa - for that matter, I can't figure
> out what generates Layout objects.
> 
> So obviously I'm way off in left field here. If <span wrap="true">
> worked, then this would be easy, but that doesn't work (and, in fact,
> throws quite the error :)).
> 
> If I wasn't using a TreeView, then it would just be labels and would be
> easy - but if I was forced to do that then it would mean trying to
> manually duplicate the effect of the TreeView widget, and that's going
> to be near impossible.
> 
> Help? :)
> 
> A small screenshot of what I'm fighting against is attached. The lines
> in italics are all much longer, and the ones that need to be wrapped
> instead of cut off.



	
	
		
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