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

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Here is the source code for com.laex.cg2d.model.joints.BEFrictionJoint.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.FrictionJointDef;
import com.laex.cg2d.model.model.Joint;
import com.laex.cg2d.model.model.Shape;
import com.laex.cg2d.model.util.FloatUtil;

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

    /** The Constant MAX_FORCE_PROP. */
    public static final String MAX_FORCE_PROP = "FrictionJoint.MaxForce";

    /** The Constant MAX_TORQUE_PROP. */
    public static final String MAX_TORQUE_PROP = "FrictionJoint.MaxTorque";

    /** The descriptors. */
    private static IPropertyDescriptor[] descriptors;

    static {
        PropertyDescriptor maxForceProp = new TextPropertyDescriptor(MAX_FORCE_PROP, "Max Force");
        PropertyDescriptor maxTorqueProp = new TextPropertyDescriptor(MAX_TORQUE_PROP, " Max Torque");

        descriptors = new IPropertyDescriptor[] { maxForceProp, maxTorqueProp };
    }

    /** The friction joint def. */
    private FrictionJointDef frictionJointDef = new FrictionJointDef();

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

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

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

    /*
     * (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 (isMaxForceProp(id)) {
            frictionJointDef.maxForce = FloatUtil.toFloat(value);
        } else if (isMaxTorqueProp(id)) {
            frictionJointDef.maxTorque = FloatUtil.toFloat(value);
        } else {
            super.setPropertyValue(id, value);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getPropertyValue(java.lang.Object)
     */
    @Override
    public Object getPropertyValue(Object id) {
        if (isMaxForceProp(id)) {
            return Float.toString(frictionJointDef.maxForce);
        }
        if (isMaxTorqueProp(id)) {
            return Float.toString(frictionJointDef.maxTorque);
        }
        return super.getPropertyValue(id);
    }

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

    /**
     * Checks if is max force prop.
     * 
     * @param id
     *          the id
     * @return true, if is max force prop
     */
    private boolean isMaxForceProp(Object id) {
        return MAX_FORCE_PROP.equals(id);
    }

    /**
     * Checks if is max torque prop.
     * 
     * @param id
     *          the id
     * @return true, if is max torque prop
     */
    private boolean isMaxTorqueProp(Object id) {
        return MAX_TORQUE_PROP.equals(id);
    }

    /* (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 = getLocalAnchorA().x;
        getLocalAnchorB().y = getLocalAnchorA().y;
    }

}