[news.eclipse.technology.nebula] Re: select item in the gallery widget

[Vicente Rico Guillén <vicenterg@xxxxxxxxxx>]

Nicolas Richeton escribió:
> Vicente Rico Guillén a écrit :
> > Nicolas Richeton escribió:
> > > Vicente Rico Guillén a écrit :
> > >
> > > > Well. I'll explain better... and thanks for answer  :-D
> > > > My app has 3 view modes: 2 tables and 1 gallery.
> > > > I have a button that rotates between these 3 views.
> > > > When the user push a button, the program rotates between these 
> > > > views, as i said before. The program fill the view perfectly, but 
> > > > when the selected view is populated, i want to show the first 
> > > > elements (if not empty). The order is "selectItem(int itemNumber);"
> > > >
> > > > Then, the code for tables is this:
> > > >
> > > >
> > > > public void selectItemNumber(int item) {
> > > >         if (GlobalSettings.moviesList.size() > 0) {
> > > >             moviesTable.setFocus();
> > > >             moviesTable.setSelection(item);
> > > >             moviesTable.notifyListeners(SWT.Selection, new Event());
> > > >             return;
> > > >         } else {
> > > >             return;
> > > >         }
> > > >     }
> > > >
> > > >
> > > >
> > > > This works for the tables, but with the gallery don't.
> > > > I've tried the same for gallery but it's impossible.
> > >
> > > setSelection( int index) does not exist in the gallery yet, please 
> > > open a bug if you need it.
> > >
> > > But you'll get the same result using :
> >
> > > Keep in mind that Gallery is a Tree and groups are root items. So you 
> > > need to call getItem() on the parent group of your item.
> >
> >
> >
> > Excuse me, but it doesn't work. You said that with:
> > setSelection( galleryGroup.getItem( index ) )
> > i'll get the same result but:
> > In javadoc, says that the method setSelection needs a GalleryItem[]. I 
> > mean, it needs an array of items. With your code, "getItem" returns 
> > only an item, and Eclipse show error because this method expect an 
> > array of GalleryItems and not only an item.
> > What i want to do is that, select ONLY an item: the first item.
> >
> > In short:
> > I want select, programmatically the first item of a gallery after this 
> > gallery is populated. I want this item selected, and painted in the 
> > gallery as selected.  In the other hand, setSelection only accept as 
> > argument an array of galleryItems and not only a galleryItem.
> > How can this be done?? Have you any idea?  Thanks!!!
>
> What about creating an array ? ;-)
>
> setSelection( new GalleryItem[]{ galleryGroup.getItem( index ) } );

It doesn't work. I get a nullpointerexception..
-------------------------------------------------------------------------------
java.lang.NullPointerException
	at 
org.eclipse.nebula.widgets.gallery.AbstractGridGroupRenderer.getVisibleItems(AbstractGridGroupRenderer.java:280)
	at 
org.eclipse.nebula.widgets.gallery.NoGroupRenderer.draw(NoGroupRenderer.java:43)
	at org.eclipse.nebula.widgets.gallery.Gallery._drawGroup(Gallery.java:1339)
	at org.eclipse.nebula.widgets.gallery.Gallery.onPaint(Gallery.java:1183)
	at 
org.eclipse.nebula.widgets.gallery.Gallery$2.paintControl(Gallery.java:586)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
--------------------------------------------------------------------------------




I show you the main code related to this:

------------------------------------------------
public void selectItemNumber(int number) {			
		if (GlobalSettings.moviesList.size() > 0) {
			moviesGallery.setFocus();
			moviesGallery.setSelection( new GalleryItem[]{ moviesGallery.getItem( 
0 ) } );
			moviesGallery.notifyListeners(SWT.Selection, new Event());
			return;
		} else {
			return;
		}
	}

-------------------------------------------------

		
	moviesGallery.addListener(SWT.SetData, new Listener() {
			
	public void handleEvent(Event event) {
				if (GlobalSettings.moviesList.size()==0) return;
				GalleryItem item = (GalleryItem) event.item;
				int index;
				index = moviesGallery.indexOf(item);
				Long movieID= GlobalSettings.moviesList.get(index);
				String caratula = getCover(index);
				if (StringUtils.isBlank(caratula)) {
					caratula = "noCover.jpg";
				}
				
				item.setImage(new Image(GUI.display,baseDirForImages+caratula));
				listaImagenes.add(item.getImage());
				item.setData(movieID);
				item.setItemCount(GlobalSettings.moviesList.size());
			}
		});

--------------------------------------------------------------------------

Globalsettings.movieslist is a LinkedList with movies Objects. And yes, 
i'm developing a movie manager: www.visualdivx.org  :-D


-------------------------------------------------------------------------------
moviesGallery.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event event) {
				if (getSelectedMovies().size() == 0)
					return;
				Long alfa = (Long) getSelectedMovies().get(0);
				long number = alfa.longValue();
				gui.getDataBase().loadMovieObjectIntoMemory(number);
				if (secundaryControl!=null) {
					secundaryControl.fillData();
// IN SECUNDARYCONTROL.FILLDATA i fill a Browser control.
				}else{
				}
			}
		});