Re: [Java-gnome-developer] Re: Tree view Expand row signal

[Manuel L. <man...@co...>]

I start looking at the source and here is the list of signals map to
TreeViewListener, ROW_COLLAPSED is defined and I believe it was intended
to be ROW_EXPANDED. This is a easy bug to fix. Meanwhiel I will download
the source and fixed myself but I'm still interesting of understanding
how signals works in java-gnome.


evtMap.initialize(this, TreeViewEvent.Type.COLUMNS_CHANGED);
evtMap.initialize(this, TreeViewEvent.Type.EXPAND_COLLAPSE_CURSOR_ROW);
evtMap.initialize(this, TreeViewEvent.Type.ROW_ACTIVATED);
evtMap.initialize(this, TreeViewEvent.Type.ROW_COLLAPSED);
evtMap.initialize(this, TreeViewEvent.Type.ROW_COLLAPSED);
evtMap.initialize(this, TreeViewEvent.Type.SELECT_ALL);
evtMap.initialize(this, TreeViewEvent.Type.SELECT_CURSOR_PARENT);
evtMap.initialize(this, TreeViewEvent.Type.SELECT_CURSOR_ROW);
evtMap.initialize(this, TreeViewEvent.Type.START_INTERACTIVE_SEARCH);
evtMap.initialize(this, TreeViewEvent.Type.TOGGLE_CURSOR_ROW);
evtMap.initialize(this, TreeViewEvent.Type.UNSELECT_ALL);

On Thu, 2005-03-31 at 18:29 -0500, Manuel Ledesma wrote:

> I have already tried that and It does not work. This is why? I'm
> trying to use the signal. Let me paste my class complete ...
> 
> here is the output of this class:
> -- row expanded --
> test-expand-row
> -- row collapsed --
> Expanded : false
> Expanded : false
> 
> The row is expanded but the class does not receive any event, only
> when row is collapsed and somehow get called twice. This was my first
> approach before trying the signals. Probably there's a bug and event
> should happen when row is expanded.
> 
> 
> public class DirectoryTree implements TreeViewListener {
> /**
> * Default constructor
> */
> public DirectoryTree(TreeView treeView) {
>                 ... somethig begfore
> _treeView.addListener(this);
> }
> 
> public TreeIter addNode(TreeIter parent, File file, boolean addImage)
> {
> TreeIter result = _treeStore.appendRow(parent);
> _treeView.addEventHandler("test-expand-row", "testExpandRow", this,
> result);
> return result;
> }
> 
> public boolean testExpandRow(Handle widget, Handle data, Object obj) {
> System.out.println("test-expand-row");
> return false;
> }
> 
> public void treeViewEvent(TreeViewEvent event) {
> 
> System.out.println("Expanded : " + event.isExpand());
> TreeIter current = event.getTreeIter();
> }
> }
> 
> 
> On Thu, 2005-03-31 at 09:56 -0300, Joao Victor wrote: 
> 
> > Try using addListener; take a look at the javadoc for TreeViewListener and TreeViewEvent. Here's a
> > quick example (i didn't compile it, so forgive me for silly errors):
> > 
> > First, if you have a TreeView you'll need an array of DataColumns defining the columns, and a
> > model object. For the example, it'll be this:
> > 
> > ------------------------------------------------------
> > 
> > //The columns
> > DataColumn cols = {new DataColumnString(), new DataColumnString()};
> > 
> > //the model object
> > TreeStore model = new TreeStore(cols);
> > 
> > Now continuing with that code...
> > 
> > _treeView.addListener(this);
> > 
> > //Callback
> > public void treeViewEvent(TreeViewEvent e) {
> > 
> >    if (e.isExpand()) {
> > 
> >       //it's an expand event...
> >       //let's get the value of the 1st column
> > 
> >       String value = model.getValue (e.getTreeIter(), (DataColumnString) cols[1]);
> >       System.out.println("value: " + value);
> >    }
> > }
> > 
> > ------------------------------------------------------
> > 
> > 
> > Cheers,
> > J.V.
> > 
> > 
> > 
> > --- Manuel Ledesma <man...@co...> wrote:
> > > I finally got the callback working, But now If I try to use the handlers
> > > the program is quitting. I read that the GObject.getGObjectFromHandle is
> > > for internal use but How can I get the row that just expanded.
> > > 
> > > example.
> > > 
> > > // Callback definition ...
> > > _treeView.addEventHandler("test-expand-row", "testExpandRow", this,
> > > result);
> > > 
> > > 
> > > // Callback function
> > > public boolean testExpandRow(Handle widget, Handle data, Object obj) {
> > >     GObject test = GObject.getGObjectFromHandle(widget);
> > > 
> > >     return true;
> > > }
> > > 
> > > 
> > > On Wed, 2005-03-30 at 23:07 -0500, Manuel Ledesma wrote:
> > > 
> > > > I'm trying to catch the "test-expand-row" signal. I cannot find an
> > > > example for Java.
> > > > 
> > > > Can someone illustrate me ? 
> > > 
> > 
> > __________________________________________________
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> > http://br.download.yahoo.com/messenger/ 
> > 
> > 
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