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

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Here is the source code for com.badlogic.gdx.scenes.scene2d.ui.TextButton.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.ui.Label.LabelStyle;
import com.badlogic.gdx.scenes.scene2d.utils.Align;
import com.badlogic.gdx.scenes.scene2d.utils.Drawable;

/** A button with a child {@link Label} to display text.
 * @author Nathan Sweet */
public class TextButton extends Button {
    private final Label label;
    private TextButtonStyle style;

    public TextButton(String text, Skin skin) {
        this(text, skin.get(TextButtonStyle.class));
        setSkin(skin);
    }

    public TextButton(String text, Skin skin, String styleName) {
        this(text, skin.get(styleName, TextButtonStyle.class));
        setSkin(skin);
    }

    public TextButton(String text, TextButtonStyle style) {
        super();
        setStyle(style);
        this.style = style;
        label = new Label(text, new LabelStyle(style.font, style.fontColor));
        label.setAlignment(Align.center);
        add(label).expand().fill();
        setSize(getPrefWidth(), getPrefHeight());
    }

    public void setStyle(ButtonStyle style) {
        if (style == null) {
            throw new NullPointerException("style cannot be null");
        }
        if (!(style instanceof TextButtonStyle))
            throw new IllegalArgumentException("style must be a TextButtonStyle.");
        super.setStyle(style);
        this.style = (TextButtonStyle) style;
        if (label != null) {
            TextButtonStyle textButtonStyle = (TextButtonStyle) style;
            LabelStyle labelStyle = label.getStyle();
            labelStyle.font = textButtonStyle.font;
            labelStyle.fontColor = textButtonStyle.fontColor;
            label.setStyle(labelStyle);
        }
    }

    public TextButtonStyle getStyle() {
        return style;
    }

    public void draw(Batch batch, float parentAlpha) {
        Color fontColor;
        if (isDisabled() && style.disabledFontColor != null)
            fontColor = style.disabledFontColor;
        else if (isPressed() && style.downFontColor != null)
            fontColor = style.downFontColor;
        else if (isChecked && style.checkedFontColor != null)
            fontColor = (isOver() && style.checkedOverFontColor != null) ? style.checkedOverFontColor
                    : style.checkedFontColor;
        else if (isOver() && style.overFontColor != null)
            fontColor = style.overFontColor;
        else
            fontColor = style.fontColor;
        if (fontColor != null)
            label.getStyle().fontColor = fontColor;
        super.draw(batch, parentAlpha);
    }

    public Label getLabel() {
        return label;
    }

    public Cell getLabelCell() {
        return getCell(label);
    }

    public void setText(String text) {
        label.setText(text);
    }

    public CharSequence getText() {
        return label.getText();
    }

    /** The style for a text button, see {@link TextButton}.
     * @author Nathan Sweet */
    static public class TextButtonStyle extends ButtonStyle {
        public BitmapFont font;
        /** Optional. */
        public Color fontColor, downFontColor, overFontColor, checkedFontColor, checkedOverFontColor,
                disabledFontColor;

        public TextButtonStyle() {
        }

        public TextButtonStyle(Drawable up, Drawable down, Drawable checked, BitmapFont font) {
            super(up, down, checked);
            this.font = font;
        }

        public TextButtonStyle(TextButtonStyle style) {
            super(style);
            this.font = style.font;
            if (style.fontColor != null)
                this.fontColor = new Color(style.fontColor);
            if (style.downFontColor != null)
                this.downFontColor = new Color(style.downFontColor);
            if (style.overFontColor != null)
                this.overFontColor = new Color(style.overFontColor);
            if (style.checkedFontColor != null)
                this.checkedFontColor = new Color(style.checkedFontColor);
            if (style.checkedOverFontColor != null)
                this.checkedFontColor = new Color(style.checkedOverFontColor);
            if (style.disabledFontColor != null)
                this.disabledFontColor = new Color(style.disabledFontColor);
        }
    }
}