/*******************************************************************************
* Copyright (c) 2011, Nathan Sweet <nathan.sweet@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
package com.badlogic.gdx.scenes.scene2d.ui;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.Group;
import com.badlogic.gdx.scenes.scene2d.Layout;
import com.badlogic.gdx.scenes.scene2d.ui.tablelayout.LibgdxToolkit;
/** @author Nathan Sweet */
public class Stack extends Group implements Layout {
private boolean needsLayout = true;
public Stack () {
this(null);
}
public Stack (String name) {
super(name);
transform = false;
}
public void layout () {
if (!needsLayout) return;
needsLayout = false;
for (int i = 0, n = children.size(); i < n; i++) {
Actor actor = children.get(i);
actor.x = 0;
actor.y = 0;
actor.width = width;
actor.height = height;
if (actor instanceof Layout) {
Layout layout = (Layout)actor;
layout.invalidate();
layout.layout();
}
}
}
public void draw (SpriteBatch batch, float parentAlpha) {
if (needsLayout) layout();
super.draw(batch, parentAlpha);
}
public void invalidate () {
needsLayout = true;
}
public float getPrefWidth () {
float width = 0;
for (int i = 0, n = children.size(); i < n; i++)
width = Math.max(width, LibgdxToolkit.instance.getPrefWidth(children.get(i)));
return width * scaleX;
}
public float getPrefHeight () {
float height = 0;
for (int i = 0, n = children.size(); i < n; i++)
height = Math.max(height, LibgdxToolkit.instance.getPrefHeight(children.get(i)));
return height * scaleY;
}
public float getMaxWidth () {
float width = 0;
for (int i = 0, n = children.size(); i < n; i++)
width = Math.max(width, LibgdxToolkit.instance.getMaxWidth(children.get(i)));
return width * scaleX;
}
public float getMaxHeight () {
float height = 0;
for (int i = 0, n = children.size(); i < n; i++)
height = Math.max(height, LibgdxToolkit.instance.getMaxHeight(children.get(i)));
return height * scaleY;
}
public float getMinWidth () {
float width = 0;
for (int i = 0, n = children.size(); i < n; i++)
width = Math.max(width, LibgdxToolkit.instance.getMinWidth(children.get(i)));
return width * scaleX;
}
public float getMinHeight () {
float height = 0;
for (int i = 0, n = children.size(); i < n; i++)
height = Math.max(height, LibgdxToolkit.instance.getMinHeight(children.get(i)));
return height * scaleY;
}
}