org.dawb.common.ui.widgets.DoubleClickModifier.java Source code

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Here is the source code for org.dawb.common.ui.widgets.DoubleClickModifier.java

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/*
 * Copyright (c) 2012 Diamond Light Source Ltd.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */

package org.dawb.common.ui.widgets;

import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;

/**
 *
 */
public abstract class DoubleClickModifier implements ICellModifier {

    protected boolean enabled;

    protected DoubleClickModifier(final ColumnViewer viewer) {
        viewer.getControl().addListener(SWT.MouseDown, new Listener() {
            @Override
            public void handleEvent(Event event) {
                setEnabled(false);
            }
        });
        viewer.getControl().addListener(SWT.MouseDoubleClick, new Listener() {
            @Override
            public void handleEvent(Event event) {
                IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
                if (selection.toList().size() != 1) {
                    return;
                }
                final ViewerCell cell = viewer.getCell(new Point(event.x, event.y));
                setEnabled(true);
                viewer.editElement(selection.getFirstElement(), cell != null ? cell.getColumnIndex() : 0);
            }
        });

    }

    /**
     * The editor can be disabled, useful for double click table editing
     * @param enabled
     */
    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    @Override
    public boolean canModify(Object element, String property) {
        return enabled;
    }

}