Thread: [Java-gnome-developer] Creating custom widgets

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Hello. Is there any way to create new widgets with java-gnome? And can I
use my own cell renderer in TreeView?

On Thu, 2008-02-28 at 22:22 +0300, Alexey Titov wrote:
> Is there any way to create new widgets with java-gnome?

Sure. Just subclass an existing Widget class.

> And can I
> use my own cell renderer in TreeView?

What are you trying to achieve? In my experience, there is little you
cannot do with CellRendererText and CellRendererPixbuf.

AfC
Sydney

thank you for answer.

> > Is there any way to create new widgets with java-gnome?
> 
> Sure. Just subclass an existing Widget class.

In Swing I can create component, that extends JComponent, override
paint() method and use Java2D to draw. What is the java-gnome way?
> 
> > And can I
> > use my own cell renderer in TreeView?
> 
> What are you trying to achieve? In my experience, there is little you
> cannot do with CellRendererText and CellRendererPixbuf.
Can I display combobox with images in the cell? Or html text (like
JLable)? Or text and icon inside one cell (like JLable, too)?

Also I wonder, is there any way to create a "lazy" table (or tree)
model, which provide data only as they displayed (not all data at once)?

On Sat, 2008-03-01 at 01:01 +0300, Alexey Titov wrote:
> > What are you trying to achieve? In my experience, there is little you
> > cannot do with CellRendererText and CellRendererPixbuf.
> Can I display combobox with images in the cell?

Yes. You [can] pack (one or more) CellRenderers into ComboBoxes the same
way you pack (one or more of) them into a TreeViewColumn.

>  Or html text (like JLable)?

Well, I have no idea what JLabel does or doesn't do, but in GTK you use
Pango markup to add emphasis to what would otherwise be ordinary text in
a Label or a CellRendererText. See
http://library.gnome.org/devel/pango/stable/PangoMarkupFormat.html or
http://www.pygtk.org/pygtk2reference/pango-markup-language.html

and use
http://java-gnome.sourceforge.net/4.0/doc/api/org/gnome/gtk/Label.html#setUseMarkup(boolean) or http://java-gnome.sourceforge.net/4.0/doc/api/org/gnome/gtk/CellRendererText.html#setMarkup(org.gnome.gtk.DataColumnString)
as appropriate.

AfC
Sydney

> Well, I have no idea what JLabel does or doesn't do, but in GTK you
> use
> Pango markup to add emphasis to what would otherwise be ordinary text
> in
> a Label or a CellRendererText. See
> http://library.gnome.org/devel/pango/stable/PangoMarkupFormat.html or
> http://www.pygtk.org/pygtk2reference/pango-markup-language.html
> 
> and use
> http://java-gnome.sourceforge.net/4.0/doc/api/org/gnome/gtk/Label.html#setUseMarkup(boolean) or http://java-gnome.sourceforge.net/4.0/doc/api/org/gnome/gtk/CellRendererText.html#setMarkup(org.gnome.gtk.DataColumnString)
> as appropriate.
> 
Thank you for answer. It works. And what about image and text in the
same cell? See gnome-system-monitor for example. And what about "lazy"
models for trees and tables? I can give an example with Swing objects.

Thread: [Java-gnome-developer] Creating custom widgets

java-gnome-developer