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Collapse All/Expand All for Outline View [message #803405]

Tue, 21 February 2012 09:49

Sreekanth SC

Messages: 14
Registered: January 2011

Junior Member

Currently I am working on XText based Editor and Outline, and I have an editor defined for xtext and an outline view to show the elements in the editor. Its the normal eclipse outline view and it has options A-Z sorting and Link with editor toolbar buttons.
Now I have a requirement to add Collapse_All and Expand_All toolbar buttons to this Outline view. I tried some options with eclipse ui ViewActions, but no luck with it.
Is there any way I can do this?

Any help in this regard is appreciated. Thanks Smile

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Re: Collapse All/Expand All for Outline View [message #804298 is a reply to message #803405]

Wed, 22 February 2012 12:49

Jan Koehnlein

Messages: 760
Registered: July 2009
Location: Hamburg

Senior Member

Should be simple
1) implement the desired behavior in an org.eclipse.jface.action.Action
that implements IOutlineContribution
2) bind it to the IOutlineContribution interface with a new binding
annotation in the UI module of your language

1) is not very Xtext specific. The IOC allows you to access the
OutlinePage and its TreeViewer
2) could look like

public void configureExpandAction(Binder binder) {
binder.bind(org.eclipse.jface.viewers.ILabelProvider.class)
.annotatedWith(Names.named("expandOutline")
.to(MyExpandAction.class);
}

Am 21.02.12 10:49, schrieb Chikki Mising name:
> Currently I am working on XText based Editor and Outline, and I have an
> editor defined for xtext and an outline view to show the elements in the
> editor. Its the normal eclipse outline view and it has options A-Z
> sorting and Link with editor toolbar buttons.
> Now I have a requirement to add Collapse_All and Expand_All toolbar
> buttons to this Outline view. I tried some options with eclipse ui
> ViewActions, but no luck with it.
> Is there any way I can do this?
> Any help in this regard is appreciated. Thanks :)

--
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Re: Collapse All/Expand All for Outline View [message #805227 is a reply to message #804298]

Thu, 23 February 2012 14:18

John J. Camilleri

Messages: 33
Registered: November 2011
Location: Göteborg

Member

I too struggled with this for a while, but managed to get it working.
My full code snippets:

ExpandAllAction.java

package mydsl.ui.editor.outline;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.xtext.ui.editor.outline.impl.OutlinePage;
import org.eclipse.xtext.ui.editor.outline.actions.IOutlineContribution;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.xtext.ui.editor.preferences.IPreferenceStoreAccess;

public class ExpandAllAction extends Action implements IOutlineContribution {
  
  private Action action;
  
  TreeViewer treeViewer;

  protected Action getAction() {
    if (action == null) {
      action = this;
      configureAction(action);
    }
    return action;
  }

  protected void configureAction(Action action) {
    action.setText("Expand All");
    action.setToolTipText("Expand All");
    action.setDescription("Expand All");
    action.setImageDescriptor(...);
    action.setDisabledImageDescriptor(...);
  }

  @Override
  public void run() {
    treeViewer.expandAll();
  }
  
  public void initialize(IPreferenceStoreAccess access) {
  }
  
  public void register(OutlinePage outlinePage) {
    IToolBarManager toolBarManager = outlinePage.getSite().getActionBars().getToolBarManager();
    toolBarManager.add(getAction());
    treeViewer = outlinePage.getTreeViewer();
  }

  public void deregister(OutlinePage outlinePage) {
    treeViewer = null;
  }  
}

MyDSLUiModule.java

import org.eclipse.xtext.ui.editor.outline.actions.IOutlineContribution;
import mydsl.ui.editor.outline.ExpandAllAction;

public void configureExpandAction(Binder binder) {
  binder.bind(IOutlineContribution.class).annotatedWith(Names.named("expandOutline")).to(ExpandAllAction.class);
}

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