BaseEasingMethod.java

package com.db.chart.view.animation.easing;

/**
 * Interface that gives the abstract methods to any possible
 * interpolator/easing function
 */
public abstract class BaseEasingMethod {

    public final static int ENTER = 0;
    public final static int UPDATE = 1;
    public final static int EXIT = 2;

    private static int mState;


    protected abstract float easeOut(float time);

    protected abstract float easeIn(float time);


    /**
     * Method that gives the next interpolated value to be processed by
     * the {@link com.db.chart.view.animation.Animation} object.
     *
     * @param time - time normalized between 0 and 1.
     * @return the next interpolation.
     */
    public float next(float time) {

        if (mState == BaseEasingMethod.ENTER)
            return easeOut(time);
        else if (mState == BaseEasingMethod.UPDATE)
            return easeOut(time);
        else if (mState == BaseEasingMethod.EXIT)
            return easeIn(time);
        return 1;
    }

    ;

    public int getState() {
        return mState;
    }

    public void setState(int state) {
        mState = state;
    }

}