Re: [Java-gnome-developer] DataColumns and adding TreeView rows

[Sami W. <swa...@re...>]

Hi Spyros,

There is a very good tutorial on using TreeView on the java-gnome web page
 
   http://java-gnome.sourceforge.net/cgi-bin/bin/view/Main/TreeViewTutorial

But from your email this is probably the most important part of the 
tutorial for you:

    Rather than creating an array of DataColumns, your code will be far
    easier to write if you create separate variables for each column:

DataColumnBoolean ColIsChecked = new DataColumnBoolean();
DataColumnPixbuf  ColFaceImage = new DataColumnPixbuf(); col3.addAttributeMapping(render3, CellRendererText.Attribute.TEXT, (DataColumnString)dc[3]);
DataColumnString ColName = new DataColumnString();
ListStore ls = new ListStore( new DataColumn[] {ColIsChecked, ColFaceImage, ColName} );
  

Then later you can do this:

...
ls.setValue(it, ColName , "Test");
...
  


>   private void initTree(){
>     list = (TreeView)glade.getWidget("listTreeView");
>        
>       DataColumn[] dc = new DataColumn[4];
>       for(int i = 0; i < 4; i++) col3.addAttributeMapping(render3, 
> CellRendererText.Attribute.TEXT, (DataColumnString)dc[3]);
>           dc[i] = new DataColumnString();
>        
>       ListStore ls = new ListStore(dc);
>       tv.setModel(ls);

This probably a mistake that happened when you were writing the email 
but shouldent it be
list.setModel(ls) ?

>      * Sets a value in the data store. To display the data in the 
> widget, you
>      * need to associate the datablock with the renderer, using 
> methods of the
>      * {@link TreeViewColumn}.

This just means calling addAttributeMaping which you already did here:

     col3.addAttributeMapping(render3, CellRendererText.Attribute.TEXT,
    (DataColumnString)dc[3]);

I hope this helps :).
Good luck,
  
   Sami Wagiaalla