com.laex.cg2d.model.joints.BEDistanceJoint.java Source code

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Here is the source code for com.laex.cg2d.model.joints.BEDistanceJoint.java

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/*
 * Copyright (c) 2012, 2013 Hemanta Sapkota.
 * 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:
 * Hemanta Sapkota (laex.pearl@gmail.com)
 */
package com.laex.cg2d.model.joints;

import org.apache.commons.lang.ArrayUtils;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;

import com.badlogic.gdx.physics.box2d.JointDef.JointType;
import com.badlogic.gdx.physics.box2d.joints.DistanceJointDef;
import com.laex.cg2d.model.model.Joint;
import com.laex.cg2d.model.model.Shape;
import com.laex.cg2d.model.util.FloatUtil;

/**
 * The Class BEDistanceJoint.
 */
public class BEDistanceJoint extends Joint {

    /** The Constant LENGTH_PROP. */
    public static final String LENGTH_PROP = "DistanceJoint.Length";

    /** The Constant FREUENCY_HZ_PROP. */
    public static final String FREUENCY_HZ_PROP = "DistanceJoint.FrequencyHZ";

    /** The Constant DAMPING_RATIO. */
    public static final String DAMPING_RATIO = "DistanceJoint.DampingRatio";

    /** The descriptor. */
    private static PropertyDescriptor[] descriptor;

    static {
        PropertyDescriptor frequencyHzProp = new TextPropertyDescriptor(FREUENCY_HZ_PROP, "Frequency");
        PropertyDescriptor dampingRatioProp = new TextPropertyDescriptor(DAMPING_RATIO, "Damping Ratio");

        descriptor = new PropertyDescriptor[] { frequencyHzProp, dampingRatioProp };

    }

    /** The distance joint def. */
    private DistanceJointDef distanceJointDef = new DistanceJointDef();

    /**
     * Instantiates a new bE distance joint.
     * 
     * @param source
     *          the source
     * @param target
     *          the target
     */
    public BEDistanceJoint(Shape source, Shape target) {
        super(source, target);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getEditableValue()
     */
    @Override
    public Object getEditableValue() {
        return distanceJointDef;
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getPropertyValue(java.lang.Object)
     */
    @Override
    public Object getPropertyValue(Object id) {
        if (isFrequencyHzProp(id)) {
            return FloatUtil.toString(this.distanceJointDef.frequencyHz);
        }
        if (isDampingRatioProp(id)) {
            return FloatUtil.toString(this.distanceJointDef.dampingRatio);
        }
        return super.getPropertyValue(id);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#setPropertyValue(java.lang.Object,
     * java.lang.Object)
     */
    @Override
    public void setPropertyValue(Object id, Object value) {
        if (isFrequencyHzProp(id)) {
            this.distanceJointDef.frequencyHz = FloatUtil.toFloat(value);
        } else if (isDampingRatioProp(id)) {
            this.distanceJointDef.dampingRatio = FloatUtil.toFloat(value);
        } else {
            super.setPropertyValue(id, value);
        }
    }

    /**
     * Checks if is damping ratio prop.
     * 
     * @param id
     *          the id
     * @return true, if is damping ratio prop
     */
    private boolean isDampingRatioProp(Object id) {
        return DAMPING_RATIO.equals(id);
    }

    /**
     * Checks if is frequency hz prop.
     * 
     * @param id
     *          the id
     * @return true, if is frequency hz prop
     */
    private boolean isFrequencyHzProp(Object id) {
        return FREUENCY_HZ_PROP.equals(id);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getPropertyDescriptors()
     */
    @Override
    public IPropertyDescriptor[] getPropertyDescriptors() {
        return (IPropertyDescriptor[]) ArrayUtils.addAll(super.getPropertyDescriptors(), descriptor);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#reconnect()
     */
    @Override
    public void reconnect() {
        super.reconnect();
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getJointType()
     */
    @Override
    public JointType getJointType() {
        return JointType.DistanceJoint;
    }

    /* (non-Javadoc)
     * @see com.laex.cg2d.model.model.Joint#computeLocalAnchors(int)
     */
    @Override
    public void computeLocalAnchors(int ptmRatio) {
        getLocalAnchorA().x = (getSource().getBounds().width / ptmRatio) / 2;
        getLocalAnchorA().y = (getSource().getBounds().height / ptmRatio) / 2;

        getLocalAnchorB().x = (getTarget().getBounds().width / ptmRatio) / 2;
        getLocalAnchorB().y = (getTarget().getBounds().height / ptmRatio) / 2;

    }

}