Passing parameters to the view

Question

In my RCP application, I have a View with a TreeViewer for Navigation on the left side and a Folder for my views on the right side. The Perspective looks like this:

public void createInitialLayout(IPageLayout layout) {
    layout.setEditorAreaVisible(false);
    layout.setFixed(false);

    layout.addStandaloneView(NavigationView.ID, false, IPageLayout.LEFT, 0.7f, layout.getEditorArea());

    right = layout.createFolder("right", IPageLayout.RIGHT, 0.3f, "com.my.app.views.browser.navigation");


    layout.getViewLayout(WallpaperView.Id).setCloseable(false);//dummy view to keep the folder from closing
    layout.getViewLayout(WallpaperView.Id).setMoveable(false);      

    right.addView(WallpaperView.Id);        
    //add some placeholders for the potential views
    right.addPlaceholder(DefaultAdminView.ID+":*");

}

I would like to open different views, based on what the user selects in the navigation tree. Figured that wouldn't be to hard. My Navigation Tree view:

tree = new TreeViewer(composite);
tree.setContentProvider(new BrowserNavigationTreeContentProvider());
tree.setLabelProvider(new BrowserNavigationTreeLabelProvider());
tree.setInput(UserProfileAdvisor.getProject());     

//register Mouselistener for doubleclick events
tree.addDoubleClickListener(new IDoubleClickListener(){

    @Override
    public void doubleClick(DoubleClickEvent event) {
        TreeSelection ts = (TreeSelection) event.getSelection();
        Object selectedItem = ts.getFirstElement();
        String viewId = DefaultAdminView.ID;                

         //set viewId depending on the selectedItem.class
        try {
            PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(viewId, String.valueOf(++viewCounter), IWorkbenchPage.VIEW_ACTIVATE);

        } catch (PartInitException e) {
            ILogHelper.error("The view for the selected object could not be opened", e);
        }
    }

});

This seems to work fine. There's just one tiny problem: I need to pass the object (let's say the selectedItem) to my view somehow, in order to let the user interact with its content. How do I do that?

I've seen some examples where some of my colleagues wrote an own View which they placed on the right side. Then they added a CTabFolder, instantiated the views and added them manually. Is there a smarter solution?

Answer 1

Create a new interface, giving it a method like accept( Object parameter ) and make your views implement it.

Then, when you do PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(viewId, String.valueOf(++viewCounter), IWorkbenchPage.VIEW_ACTIVATE) the method showView returns an IViewPart. Cast this return to your interface and call the accept method.

Answer 2

Use the SelectionService for that, please refer to Eclipse RCP let two views communicate

Implement the SelectionProvider in your "Navigation" and in the opened view you can ask for the selected object from the selection-service (see article)

HTH Tom