/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
******************************************************************************/
package com.badlogic.gdx.scenes.scene2d.actions;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.scenes.scene2d.Actor;
/**
* Sets the alpha for an actor's color (or a specified color), from the current alpha to the new alpha. Note this action
* transitions from the alpha at the time the action starts to the specified alpha.
*
* @author Nathan Sweet
*/
public class AlphaAction extends TemporalAction {
private float start, end;
private Color color;
protected void begin() {
if (color == null)
color = actor.getColor();
start = color.a;
}
protected void update(float percent) {
color.a = start + (end - start) * percent;
}
public void reset() {
super.reset();
color = null;
}
public Color getColor() {
return color;
}
/**
* Sets the color to modify. If null (the default), the {@link #getActor() actor's} {@link Actor#getColor() color}
* will be used.
*/
public void setColor(Color color) {
this.color = color;
}
public float getAlpha() {
return end;
}
public void setAlpha(float alpha) {
this.end = alpha;
}
}