org.kalypso.ogc.gml.outline.nodes.ThemeNodeContentProvider.java Source code

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Here is the source code for org.kalypso.ogc.gml.outline.nodes.ThemeNodeContentProvider.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.ogc.gml.outline.nodes;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Control;
import org.kalypso.contribs.eclipse.jface.viewers.ViewerUtilities;

/**
 * Content provider for modifying the outline tree. It filters the styles and the rules.
 * 
 * @author Holger Albert
 */
public class ThemeNodeContentProvider implements ITreeContentProvider {
    private TreeViewer m_viewer;

    private boolean m_isCompact = true;

    @Override
    public void dispose() {
    }

    protected TreeViewer getViewer() {
        return m_viewer;
    }

    @Override
    public Object[] getElements(final Object inputElement) {
        return getChildren(inputElement);
    }

    @Override
    public Object[] getChildren(final Object element) {
        final IThemeNode node = (IThemeNode) element;

        if (m_isCompact && node.isCompactable())
            return node.getChildrenCompact();

        return node.getChildren();
    }

    @Override
    public boolean hasChildren(final Object element) {
        final IThemeNode node = (IThemeNode) element;

        if (m_isCompact && node.isCompactable())
            return node.hasChildrenCompact();

        return node.hasChildren();
    }

    @Override
    public Object getParent(final Object element) {
        if (!(element instanceof IThemeNode))
            return null;

        final IThemeNode node = (IThemeNode) element;
        return node.getParent();
    }

    /**
     * @see org.eclipse.ui.model.WorkbenchContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
     */
    @Override
    public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) {
        m_viewer = (TreeViewer) viewer;
    }

    protected void refreshViewer(final Object element) {
        final TreeViewer viewer = getViewer();
        final Control control = viewer.getControl();
        if (control == null || control.isDisposed())
            return;

        final Object elementToRefresh = element == null ? m_viewer.getInput() : element;
        ViewerUtilities.refresh(viewer, elementToRefresh, true);
    }

    public boolean isCompact() {
        return m_isCompact;
    }

    public void setCompact(final boolean compact) {
        if (compact == m_isCompact)
            return;

        m_isCompact = compact;

        refreshViewer(null);
    }

}