WidgetMinimumProperty.java

/*******************************************************************************
 * Copyright (c) 2009, 2015 Matthew Hall and others.
 * 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
 *
 * Contributors:
 *     Matthew Hall - initial API and implementation (bug 264286)
 *******************************************************************************/

package org.eclipse.jface.internal.databinding.swt;

import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.swt.widgets.Scale;
import org.eclipse.swt.widgets.Slider;
import org.eclipse.swt.widgets.Spinner;

/**
 * @since 3.3
 *
 */
public class WidgetMinimumProperty extends WidgetDelegatingValueProperty {
	private IValueProperty scale;
	private IValueProperty slider;
	private IValueProperty spinner;

	/**
	 *
	 */
	public WidgetMinimumProperty() {
		super(Integer.TYPE);
	}

	@Override
	protected IValueProperty doGetDelegate(Object source) {
		if (source instanceof Scale) {
			if (scale == null)
				scale = new ScaleMinimumProperty();
			return scale;
		}
		if (source instanceof Slider) {
			if (slider == null) {
				slider = new SliderMinimumProperty();
			}
			return slider;
		}
		if (source instanceof Spinner) {
			if (spinner == null)
				spinner = new SpinnerMinimumProperty();
			return spinner;
		}
		throw notSupported(source);
	}
}