[news.eclipse.platform.rcp] Re: tooltips for the generated editor

[Gilbert Mirenque <formatzeh@xxxxxx>]

Thanks for the snippet links. They helped a lot. Now I tell you what I
did. First I implemented my own CellLabelProvider called
ToolTipCellLabelProvider. The class looks like this:

public class ToolTipCellLabelProvider extends CellLabelProvider{
	
private AdapterFactory adapterFactory;
	
public ToolTipCellLabelProvider(AdapterFactory adapterFactory) {
	super();
	this.adapterFactory = adapterFactory;
}

public String getToolTipText(Object element) {
	String text = new
AdapterFactoryItemDelegator(adapterFactory).getText(element);
	if(element instanceof EObject){
		if(((EObject) element).eClass() instanceof EModelElement){
			String documentation =
EcoreUtil.getDocumentation((EModelElement)((EObject) element).eClass());
			if(documentation != null){
				text += " --> " + documentation;
			}
		}
	}
	return text;
}

public Point getToolTipShift(Object object) {
	return new Point(5,5);
}

public int getToolTipDisplayDelayTime(Object object) {
	return 0;
}

public int getToolTipTimeDisplayed(Object object) {
	return 5000;
}
	
public void update(ViewerCell cell) {
	cell.setText(cell.getElement().toString());
		
}
}

Then I added the label provider to the TreeViewer of the first tab in
the generated editor in that way:

ViewerPane viewerPane = new ViewerPane(getSite().getPage(),
CRUISeMetaModelEditor.this) {
	@Override
	public Viewer createViewer(Composite composite) {
		Tree tree = new Tree(composite, SWT.MULTI);
		TreeViewer newTreeViewer = new TreeViewer(tree);
		///// tooltips
		ColumnViewerToolTipSupport.enableFor(newTreeViewer);
		ToolTipCellLabelProvider labelProvider = new
ToolTipCellLabelProvider(adapterFactory);
		newTreeViewer.setLabelProvider(labelProvider);
		//////////////
		return newTreeViewer;
	}
	@Override
	public void requestActivation() {
		super.requestActivation();
		setCurrentViewerPane(this);
	}
};

But it doesn't work :( While debugging I noticed that getToolTipText(..)
never is being accessed. So I thought that I don't have to add the
tooltip support for the treeViewer, but for the selectionViewer directly
because there setLabelProvider will be invoked as well (generated) and
the selectionViewer = (TreeViewer)viewerPane.getViewer(); But the
generated LabelProvider which is set is:

new AdapterFactoryLabelProvider.ColorProvider(adapterFactory,
selectionViewer)

As there is no interface for ColorProvider I searched for all
implementing interfaces of ColorProvider and all implementing interfaces
of its super classes and let ToolTipCellLabelProvider implement that by
just delegating it to an ColorProvider instance like this:

ColumnViewerToolTipSupport.enableFor(selectionViewer);
ColorProvider provider = new
AdapterFactoryLabelProvider.ColorProvider(adapterFactory, selectionViewer);
ToolTipCellLabelProvider labelProvider = new
ToolTipCellLabelProvider(provider);
selectionViewer.setLabelProvider(labelProvider);

Now the tooltips worked adequate for all nodes in the tree. But now I
have another problem. The normal texts and little images of the nodes
won't be displayed anymore. As text I only get the toString output of
the object. Do you have any suggestions how to combine both?

best regards,
Gilbert