SWT JFace: SelectionProvider not working in TabFolder - tabs

Question

In a GraphicalEditor I created a tab folder:
private final String[] tabNames = { "Text", "Image" };
private ResourcesTextComposite comText;
private ResourcesImageComposite comImage;
...
public void createPartControl(Composite parent) {
...
tabFolder = new TabFolder(parent, SWT.BORDER);
for (int loopIndex = 0; loopIndex < tabNames.length; loopIndex++) {
TabItem tabItem = new TabItem(tabFolder, SWT.NULL);
tabItem.setText(tabNames[loopIndex]);
if (loopIndex == 0) {
comText = new ResourcesTextComposite(tabFolder, SWT.NONE,
resources);
tabItem.setControl(comText);
} else if (loopIndex == 1) {
comImage = new ResourcesImageComposite(tabFolder, SWT.NONE,
resources);
tabItem.setControl(comImage);
}
}
...
}
it has 2 tab items and each item has a composite in it, and each composite has a TableViewer respectively.
I tried this to make each TableViewer the selection provider when the user selects the corresponding tab item (the same function createPartControl of the editor):
public void createPartControl(Composite parent) {
...
tabFolder.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
int tabIdx = tabFolder.getSelectionIndex();
getSite().setSelectionProvider(null);
if (tabIdx == 0) {
getSite().setSelectionProvider(comText.getViewer());
} else if (tabIdx == 1) {
getSite().setSelectionProvider(comImage.getViewer());
}
System.out.println("widgetSelected" + getSite() + ": "
+ getSite().getSelectionProvider());
}
public void widgetDefaultSelected(SelectionEvent e) {
widgetSelected(e);
}
});
...
}
I hope when I select a row in a TableViewer, the Properties view will show the selected model's properties, I've complete those IPropertySource things and they works well in other editors that has no tab folders, so I think the problem should be in the Selection Provider area.
Any ideas or has anyone encountered the same problem?

Answer 1

If you have multiple selection providers in a view or editor, then you need to use a mediator like org.eclipse.jdt.internal.ui.viewsupport.SelectionProviderMediator. Note that it is unfortunately internal, so you need to copy it to your own project