[poppler] Drawing styledForm Widgets

[Carlos Garcia Campos]

Excerpts from Albert Astals Cid's message of mar oct 11 14:07:07 +0200 2011:
> A Dilluns, 10 d'octubre de 2011, jose.aliste at gmail.com vàreu escriure:
> > Hi list,
> > 
> > there is idea, why not adding some support to draw style form widgets
> > to poppler. I know that poppler is already doing that when rendering,
> > but the idea would be to have a method that given a form widget,
> > either renders the contents of the widget for you with the correct
> > style, or some sort of struct with all the style information of the
> > corresponding constructed AP stream, so the frontends can use this
> > information to mimic poppler's rendering to render the widgets
> > themselves. In order for the first option to work, this rendering
> > should not depend on reparsing otherwise it would too slow (Basically,
> > I consider that we could construct the AP stream and then using this
> > stream with some Gfx magic it should be possible to render the widgets
> > value without reparsing and thus being fast enough to put this method
> > in a widget-rendering callback)
> 
> As I understand what you want is apps no longer "embedding" "real" widgets on 
> top of the forms but the apps drawing the forms themselves based on info given 
> by poppler?
> 
> I am not sure this is going to be easy to do, since using "real" widgets gives 
> you lots of functionality for free (e.g: copy/paste, keyboard/mouse handling, 
> etc) and if we do what you say I understand we have to stop using "real" 
> widgets and do all this stuff in the final app which will be lots of work. Of 
> course that does not mean that we could still provide the option to have it 
> and not make it mandatory.
> 
> Or did I totally misunderstand what you meant?

No, I think he means drawing current forms with the same style as the
widgets, using the current theme, but using real widgets for the
interactivity with the user. I don't know how it's done in okular, but
in Evince, we only use a real widget when the user clicks on a form,
and it's destroyed when the form is edited. This way we don't need to
keep widgets in the view all the time if they are not used. For some
forms like check and radio buttons we don't even use real
widgets. This way if you draw a choice widget exactly the same a
GtkComboBox would be, when you click on the form to edit it, ideally you
wouldn't even notice there wasn't a real widget.

José, is that the idea?

> Albert
> 
> > 
> > 
> > 
> > Greetings
> > 
> > José
> > _______________________________________________
> > poppler mailing list
> > poppler at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/poppler
-- 
Carlos Garcia Campos
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x523E6462
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