au.gov.ga.earthsci.common.ui.viewers.ControlTreeViewer.java Source code

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Here is the source code for au.gov.ga.earthsci.common.ui.viewers.ControlTreeViewer.java

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/*******************************************************************************
 * Copyright 2012 Geoscience Australia
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package au.gov.ga.earthsci.common.ui.viewers;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Tree;

/**
 * A {@link TreeViewer} that implements {@link IControlViewer}
 * 
 * @author James Navin (james.navin@ga.gov.au)
 */
public class ControlTreeViewer extends TreeViewer implements IControlViewer {
    private final ControlTreeViewerHelper helper = new ControlTreeViewerHelper(this);

    public ControlTreeViewer(Composite parent, int style) {
        super(parent, style);

        // XXX: This is a workaround to reduce the flicker that occurs when tree item controls are redrawn 
        getTree().setBackgroundImage(TransparentIcon.IMAGE);
    }

    public ControlTreeViewer(Composite parent) {
        super(parent);
        getTree().setBackgroundImage(TransparentIcon.IMAGE);
    }

    public ControlTreeViewer(Tree tree) {
        super(tree);
        getTree().setBackgroundImage(TransparentIcon.IMAGE);
    }

    @Override
    public IControlProvider getControlProvider() {
        return helper.getControlProvider();
    }

    @Override
    public void setControlProvider(IControlProvider controlProvider) {
        helper.setControlProvider(controlProvider);
    }

    @Override
    public Composite getControlForItem(Item item) {
        return helper.getControlForItem(item);
    }

    @Override
    protected void associate(Object element, Item item) {
        super.associate(element, item);
        helper.associate(element, item);
    }

    @Override
    protected void disassociate(Item item) {
        super.disassociate(item);
        helper.disassociate(item);
    }
}