plugins/org.eclipse.app4mc.emf.visualizations/src/org/eclipse/app4mc/emf/visualizations/EObjectRefsConfig.java

/**
 ********************************************************************************
 * Copyright (c) 2022 Robert Bosch GmbH.
 * 
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 * 
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     Robert Bosch GmbH - initial API and implementation
 ********************************************************************************
 */

package org.eclipse.app4mc.emf.visualizations;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

/**
 * Configuration of the visualization
 *
 */
public class EObjectRefsConfig {
	private final PropertyChangeSupport changeSupport = new PropertyChangeSupport(this);

	private boolean horizontalLayout = false;
	private boolean showDerivedReferences = false;
	private boolean showReferenceLabels = false;
	private int scale = 100; // percent

	public boolean isHorizontalLayout() {
		return horizontalLayout;
	}

	public void setHorizontalLayout(boolean horizontal) {
		horizontalLayout = horizontal;
		firePropertyChange("parameter1", null, horizontalLayout);
	}

	public boolean isShowDerivedReferences() {
		return showDerivedReferences;
	}

	public void setShowDerivedReferences(boolean showDerived) {
		showDerivedReferences = showDerived;
		firePropertyChange("parameter2", null, showDerivedReferences);
	}

	public boolean isShowReferenceLabels() {
		return showReferenceLabels;
	}

	public void setShowReferenceLabels(boolean showLabels) {
		showReferenceLabels = showLabels;
		firePropertyChange("parameter3", null, showReferenceLabels);
	}

	public int getScale() {
		return scale;
	}

	/**
	 * Sets a new scale value (if the new value is different and within the bounds [10, 200])
	 * 
	 * @param newScale
	 * @return true if value was changed
	 */
	public boolean setScale(int newScale) {
		if (scale == newScale || newScale < 10 || newScale > 200) {
			return false;	
		}

		int oldScale = scale;
		scale = newScale;
		firePropertyChange("scale", oldScale, newScale);
		return true;
	}

	public boolean decrementScale() {
		return setScale(Math.max(10, scale - 10)); // minimum 10 %
	}

	public boolean incrementScale() {
		return setScale(Math.min(200, scale + 10)); // maximum 200 %
	}

	// property change handling

	public void addChangeListener(PropertyChangeListener listener) {
		changeSupport.addPropertyChangeListener(listener);
	}

	public void removeChangeListener(PropertyChangeListener listener) {
		changeSupport.removePropertyChangeListener(listener);
	}

	protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
		changeSupport.firePropertyChange(propertyName, oldValue, newValue);
	}

}