com.badlogic.gdx.scenes.scene2d.ui.CheckBox.java Source code

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Here is the source code for com.badlogic.gdx.scenes.scene2d.ui.CheckBox.java

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/*******************************************************************************
 * 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.ui;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.scenes.scene2d.utils.Align;
import com.badlogic.gdx.scenes.scene2d.utils.Drawable;

/** A checkbox is a button that contains an image indicating the checked or unchecked state and a label.
 * @author Nathan Sweet */
public class CheckBox extends TextButton {
    private Image image;
    private Cell imageCell;
    private CheckBoxStyle style;

    public CheckBox(String text, Skin skin) {
        this(text, skin.get(CheckBoxStyle.class));
    }

    public CheckBox(String text, Skin skin, String styleName) {
        this(text, skin.get(styleName, CheckBoxStyle.class));
    }

    public CheckBox(String text, CheckBoxStyle style) {
        super(text, style);
        clearChildren();
        imageCell = add(image = new Image(style.checkboxOff));
        Label label = getLabel();
        add(label);
        label.setAlignment(Align.left);
        setSize(getPrefWidth(), getPrefHeight());
    }

    public void setStyle(ButtonStyle style) {
        if (!(style instanceof CheckBoxStyle))
            throw new IllegalArgumentException("style must be a CheckBoxStyle.");
        super.setStyle(style);
        this.style = (CheckBoxStyle) style;
    }

    /** Returns the checkbox's style. Modifying the returned style may not have an effect until {@link #setStyle(ButtonStyle)} is
     * called. */
    public CheckBoxStyle getStyle() {
        return style;
    }

    public void draw(Batch batch, float parentAlpha) {
        Drawable checkbox = null;
        if (isDisabled()) {
            if (isChecked && style.checkboxOnDisabled != null)
                checkbox = style.checkboxOnDisabled;
            else
                checkbox = style.checkboxOffDisabled;
        }
        if (checkbox == null) {
            if (isChecked && style.checkboxOn != null)
                checkbox = style.checkboxOn;
            else if (isOver() && style.checkboxOver != null && !isDisabled())
                checkbox = style.checkboxOver;
            else
                checkbox = style.checkboxOff;
        }
        image.setDrawable(checkbox);
        super.draw(batch, parentAlpha);
    }

    public Image getImage() {
        return image;
    }

    public Cell getImageCell() {
        return imageCell;
    }

    /** The style for a select box, see {@link CheckBox}.
     * @author Nathan Sweet */
    static public class CheckBoxStyle extends TextButtonStyle {
        public Drawable checkboxOn, checkboxOff;
        /** Optional. */
        public Drawable checkboxOver, checkboxOnDisabled, checkboxOffDisabled;

        public CheckBoxStyle() {
        }

        public CheckBoxStyle(Drawable checkboxOff, Drawable checkboxOn, BitmapFont font, Color fontColor) {
            this.checkboxOff = checkboxOff;
            this.checkboxOn = checkboxOn;
            this.font = font;
            this.fontColor = fontColor;
        }

        public CheckBoxStyle(CheckBoxStyle style) {
            this.checkboxOff = style.checkboxOff;
            this.checkboxOn = style.checkboxOn;
            this.checkboxOver = style.checkboxOver;
            this.checkboxOffDisabled = style.checkboxOffDisabled;
            this.checkboxOnDisabled = style.checkboxOnDisabled;
            this.font = style.font;
            this.fontColor = new Color(style.fontColor);
        }
    }
}