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Showing Properties of EObjects without Selection [message #1805411]

Sun, 14 April 2019 12:08

Eclipse User

Hello Everyone,

I am working with Nebula NatTables and EMF , and I would like to implement a Table Based Editor.
I am Displaying EMF Objects in Table but the SelectionEvent on Table Cell returns the Selected Cell instead of underlying Eobject.

However it gives a possibility to get the underlying object by a method such as:

if (event instanceof CellSelectionEvent) {
CellSelectionEvent cellEvent = (CellSelectionEvent) event;

Object input =
natTable.getDataValueByPosition(cellEvent.getColumnPosition(),
cellEvent.getRowPosition());

if (input instanceof EObject)
{
EObject selectedObject = (EObject)input;
}

At this point , I wish to trigger the properties View to display the properties of this EObject in Properties View.

Could someone please help me with how can I display this EObject in the Properties View.

Many Thanks!

Re: Showing Properties of EObjects without Selection [message #1805528 is a reply to message #1805411]

Tue, 16 April 2019 14:27

Eclipse User

The entry point for updating a property sheet page is org.eclipse.ui.views.properties.PropertySheetPage.selectionChanged(IWorkbenchPart, ISelection) so you must present a selection containing EObjects. You'll find an example in around this line:

https://git.eclipse.org/c/emf/org.eclipse.emf.git/tree/plugins/org.eclipse.emf.edit.ui/src/org/eclipse/emf/edit/ui/util/FindAndReplaceTarget.java#n1155

This code is used to support the find dialog and has logic for searching the contents of the property sheet page and logic for showing the property sheet page and setting the selection of that page.

In the generated editors you'll find UnwrappingSelectionProvider is used. Somehow you should ensure that the editor's selection isn't just a cell selection but something more general that the properties vie will recognize.

Re: Showing Properties of EObjects without Selection [message #1831460 is a reply to message #1805528]

Thu, 20 August 2020 05:28

Eclipse User

Hi Everyone,

I also have a NatTable Editor that displays EObjects. I would like to get the Properties view to show the properties of the selected EObject in the natTable.
I was able to retrieve the selected Object as a ISelection. and I used the org.eclipse.ui.views.properties.PropertySheetPage.selectionChanged(IWorkbenchPart, ISelection) but nothing happened I still do not get the property view to trigger. this the code I used. what am I missing? what am I doing wrong ?

natTable.addLayerListener(new ILayerListener() {

@Override
public void handleLayerEvent(ILayerEvent event) {

if (event instanceof CellSelectionEvent) {

CellSelectionEvent cellEvent = (CellSelectionEvent) event;
int columnPosition = cellEvent.getColumnPosition();
int rowPosition = cellEvent.getRowPosition();
int columnIndex = natTable.getColumnIndexByPosition(columnPosition);
int rowIndex = natTable.getRowIndexByPosition(rowPosition);
Object currentselection = bodyLayerStack.getTreeLayer().
getDataValueByPosition(bodyLayerStack.getTreeLayer().
getColumnPositionByIndex(columnIndex), bodyLayerStack.getTreeLayer().
getRowPositionByIndex(rowIndex));
ISelection selection = new StructuredSelection(currentselection);

IWorkbenchPage page = getSite().getPage();
IWorkbenchPart part = page.getActivePart();
IViewPart viewPart = page.findView("org.eclipse.ui.views.PropertySheet");

PropertySheet sheet = (PropertySheet) viewPart;
IPage sheetPage = sheet.getCurrentPage();
if( sheetPage instanceof PropertySheetPage && sheetPage!= null) {
System.out.println(" works ");
PropertySheetPage activePropertysheet = (PropertySheetPage) sheetPage ;
activePropertysheet.selectionChanged(part, selection);
}}});

Thanks for the support

Re: Showing Properties of EObjects without Selection [message #1831473 is a reply to message #1831460]

Thu, 20 August 2020 08:36

Eclipse User

All I can suggest is using the debugger to trace what's happening. Is "currentselection" really an EObject?

Re: Showing Properties of EObjects without Selection [message #1831480 is a reply to message #1831473]

Thu, 20 August 2020 09:56

Eclipse User

Hi Ed,

Thanks for the quick reply.
It's an Object yes not an EObject . Could that be the reason why it's does not trigger the Properties View ? Because everything else seems fine I think.
Do you have any suggestions on what I should try otherweise ?

Thanks

Re: Showing Properties of EObjects without Selection [message #1831482 is a reply to message #1831480]

Thu, 20 August 2020 10:13

Eclipse User

I'm not sure what you've done to specialize/implement the properties view, but the default EMF generated support only works for EObject, Resource, and ResourceSet by default. Again, debugging is the best way to find answers...

Re: Showing Properties of EObjects without Selection [message #1831591 is a reply to message #1831482]

Mon, 24 August 2020 08:32

Eclipse User

Hi Ed,

Thank you for your help. I was able to open the default properties View of the selected EObject in the natTable .

I have designed a sirius Properties View that is called when an element is selected in the model Explorer for example or in a Sirius Diagram. I would like that same sirius properties View to trigger when I select an Element in my NatTable Editor, not the default Properties View. I read in the Documentation that "Sirius properties view are enabled whenever the selected element is part of an opened session, i.e. any element selected inside a Sirius editor or from the Model Explorer view on an opened session." So I am wondering if this is even possible to do from a natTable editor but if it is, can you please direct me on how i would do this ? I could Open a sirius Session but I could't figure out what to do next.

Code:
IWorkbenchPage page = getSite().getPage();
IWorkbenchPart part = page.getActivePart();
IViewPart viewPart = page.findView("org.eclipse.ui.views.PropertySheet");
PropertySheet sheet = (PropertySheet) viewPart;
IPage sheetPage = sheet.getCurrentPage();
EObject eWrapper = (EObject)wrapper;
if(sheetPage instanceof PropertySheetPage && sheetPage!= null) {
PropertySheetPage activePropertysheet = (PropertySheetPage) sheetPage ;

Resource modelResource= eWrapper.eResource();
List<Resource> resourses = modelResource.getResourceSet().getResources();
Resource resource = resourses.get(0);
URI myRepFileURI = resource.getURI();
Session siriusSession = SessionManager.INSTANCE.getSession(myRepFileURI, new NullProgressMonitor());

ISelection Eselectionwrapper = new StructuredSelection(eWrapper);
activePropertysheet.selectionChanged(part, Eselectionwrapper);
}

Re: Showing Properties of EObjects without Selection [message #1831609 is a reply to message #1831591]

Tue, 25 August 2020 01:17

Eclipse User

Normally an editor or a viewer provides its own contribution to the IPropertySheetPage by overriding org.eclipse.ui.part.WorkbenchPart.getAdapter(Class<T>). E.g.,

  @Override
  public <T> T getAdapter(Class<T> key)
  {
    if (key.equals(IPropertySheetPage.class))
    {
      return key.cast(createPropertySheetPage());
    }
    else
    {
      return super.getAdapter(key);
    }
  }

And the editor or viewer implements ISelectionProvider or uses org.eclipse.ui.IWorkbenchSite.setSelectionProvider(ISelectionProvider) on the editor/viewer site so that its selection is automatically available as input to the property sheet page contributed by that editor or viewer.

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