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A library of ready-to-use animations for JavaFX
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package animatefx.animation.partial;

import animatefx.animation.AnimateFXInterpolator;
import animatefx.animation.AnimationFX;
import animatefx.animation.ScaleAnimation;
import animatefx.modifier.IllegalModifierException;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.scene.Node;
import javafx.util.Duration;

/**
 * Can be used in combination with Contract.
 *
 * @author Dominik Müka aka 41zu
 */
public class Expand extends ScaleAnimation {

    /**
     * Expands the Node by an defined scale.

     * The default values are:

     * beginScale = 1.0

     * endScale = 1.05
     *
     * @param node Node which should be expanded
     */
    public Expand(Node node) {
        super(node);
    }

    /**
     * resets the Node to the beginScale value
     */
    @Override
    protected AnimationFX resetNode() {
        getNode().setScaleX(beginScale);
        getNode().setScaleY(beginScale);
        getNode().setScaleZ(beginScale);
        return this;
    }

    @Override
    protected void initTimeline() {
        Double beginScale = this.beginScale;
        Double endScale = this.endScale;

        if (beginScale == null)
            beginScale = 1.0;

        if (endScale == null)
            endScale = 1.05;

        if (beginScale > endScale)
            throw new IllegalModifierException("beginScale must be smaller than endScale. Consider using the Contract animation.");

        setTimeline(new Timeline(
                new KeyFrame(Duration.millis(0),
                        new KeyValue(getNode().scaleXProperty(), beginScale, AnimateFXInterpolator.EASE),
                        new KeyValue(getNode().scaleYProperty(), beginScale, AnimateFXInterpolator.EASE),
                        new KeyValue(getNode().scaleZProperty(), beginScale, AnimateFXInterpolator.EASE)
                ),
                new KeyFrame(Duration.millis(500),
                        new KeyValue(getNode().scaleXProperty(), endScale, AnimateFXInterpolator.EASE),
                        new KeyValue(getNode().scaleYProperty(), endScale, AnimateFXInterpolator.EASE),
                        new KeyValue(getNode().scaleZProperty(), endScale, AnimateFXInterpolator.EASE)
                )
        ));
    }
}