org.kalypso.ui.editor.gmleditor.actions.GoIntoActionDelegate.java Source code

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Here is the source code for org.kalypso.ui.editor.gmleditor.actions.GoIntoActionDelegate.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypso.ui.editor.gmleditor.actions;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.kalypso.ui.editor.gmleditor.part.GMLContentProvider;
import org.kalypso.ui.editor.gmleditor.part.GmlEditor;

/**
 * @author Gernot Belger
 */
public class GoIntoActionDelegate implements IEditorActionDelegate {
    private GmlEditor m_targetEditor;

    /**
     * @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction, org.eclipse.ui.IEditorPart)
     */
    @Override
    public void setActiveEditor(final IAction action, final IEditorPart targetEditor) {
        m_targetEditor = (GmlEditor) targetEditor;
    }

    /**
     * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
     */
    @Override
    public void run(final IAction action) {
        final TreeViewer treeViewer = m_targetEditor.getTreeView().getTreeViewer();
        final IContentProvider cp = treeViewer.getContentProvider();
        if (!(cp instanceof GMLContentProvider))
            return;

        final GMLContentProvider contentProvider = (GMLContentProvider) cp;
        final IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
        contentProvider.goInto(selection.getFirstElement());

        m_targetEditor.fireDirty();
    }

    /**
     * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
     */
    @Override
    public void selectionChanged(final IAction action, final ISelection selection) {
        final IStructuredSelection structSel = (IStructuredSelection) selection;
        if (m_targetEditor == null) {
            action.setEnabled(false);
            return;
        }

        final TreeViewer treeViewer = m_targetEditor.getTreeView().getTreeViewer();
        final ITreeContentProvider cp = (ITreeContentProvider) treeViewer.getContentProvider();
        action.setEnabled(structSel.size() == 1 && cp.hasChildren(structSel.getFirstElement()));
    }
}