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      1 /*******************************************************************************
      2  * Copyright 2011 See AUTHORS file.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *   http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  ******************************************************************************/
     16 
     17 package com.badlogic.gdx.scenes.scene2d.ui;
     18 
     19 import com.badlogic.gdx.graphics.Color;
     20 import com.badlogic.gdx.graphics.g2d.Batch;
     21 import com.badlogic.gdx.graphics.g2d.BitmapFont;
     22 import com.badlogic.gdx.scenes.scene2d.ui.Label.LabelStyle;
     23 import com.badlogic.gdx.scenes.scene2d.utils.Drawable;
     24 import com.badlogic.gdx.utils.Align;
     25 
     26 /** A button with a child {@link Label} to display text.
     27  * @author Nathan Sweet */
     28 public class TextButton extends Button {
     29 	private final Label label;
     30 	private TextButtonStyle style;
     31 
     32 	public TextButton (String text, Skin skin) {
     33 		this(text, skin.get(TextButtonStyle.class));
     34 		setSkin(skin);
     35 	}
     36 
     37 	public TextButton (String text, Skin skin, String styleName) {
     38 		this(text, skin.get(styleName, TextButtonStyle.class));
     39 		setSkin(skin);
     40 	}
     41 
     42 	public TextButton (String text, TextButtonStyle style) {
     43 		super();
     44 		setStyle(style);
     45 		this.style = style;
     46 		label = new Label(text, new LabelStyle(style.font, style.fontColor));
     47 		label.setAlignment(Align.center);
     48 		add(label).expand().fill();
     49 		setSize(getPrefWidth(), getPrefHeight());
     50 	}
     51 
     52 	public void setStyle (ButtonStyle style) {
     53 		if (style == null) throw new NullPointerException("style cannot be null");
     54 		if (!(style instanceof TextButtonStyle)) throw new IllegalArgumentException("style must be a TextButtonStyle.");
     55 		super.setStyle(style);
     56 		this.style = (TextButtonStyle)style;
     57 		if (label != null) {
     58 			TextButtonStyle textButtonStyle = (TextButtonStyle)style;
     59 			LabelStyle labelStyle = label.getStyle();
     60 			labelStyle.font = textButtonStyle.font;
     61 			labelStyle.fontColor = textButtonStyle.fontColor;
     62 			label.setStyle(labelStyle);
     63 		}
     64 	}
     65 
     66 	public TextButtonStyle getStyle () {
     67 		return style;
     68 	}
     69 
     70 	public void draw (Batch batch, float parentAlpha) {
     71 		Color fontColor;
     72 		if (isDisabled() && style.disabledFontColor != null)
     73 			fontColor = style.disabledFontColor;
     74 		else if (isPressed() && style.downFontColor != null)
     75 			fontColor = style.downFontColor;
     76 		else if (isChecked && style.checkedFontColor != null)
     77 			fontColor = (isOver() && style.checkedOverFontColor != null) ? style.checkedOverFontColor : style.checkedFontColor;
     78 		else if (isOver() && style.overFontColor != null)
     79 			fontColor = style.overFontColor;
     80 		else
     81 			fontColor = style.fontColor;
     82 		if (fontColor != null) label.getStyle().fontColor = fontColor;
     83 		super.draw(batch, parentAlpha);
     84 	}
     85 
     86 	public Label getLabel () {
     87 		return label;
     88 	}
     89 
     90 	public Cell getLabelCell () {
     91 		return getCell(label);
     92 	}
     93 
     94 	public void setText (String text) {
     95 		label.setText(text);
     96 	}
     97 
     98 	public CharSequence getText () {
     99 		return label.getText();
    100 	}
    101 
    102 	/** The style for a text button, see {@link TextButton}.
    103 	 * @author Nathan Sweet */
    104 	static public class TextButtonStyle extends ButtonStyle {
    105 		public BitmapFont font;
    106 		/** Optional. */
    107 		public Color fontColor, downFontColor, overFontColor, checkedFontColor, checkedOverFontColor, disabledFontColor;
    108 
    109 		public TextButtonStyle () {
    110 		}
    111 
    112 		public TextButtonStyle (Drawable up, Drawable down, Drawable checked, BitmapFont font) {
    113 			super(up, down, checked);
    114 			this.font = font;
    115 		}
    116 
    117 		public TextButtonStyle (TextButtonStyle style) {
    118 			super(style);
    119 			this.font = style.font;
    120 			if (style.fontColor != null) this.fontColor = new Color(style.fontColor);
    121 			if (style.downFontColor != null) this.downFontColor = new Color(style.downFontColor);
    122 			if (style.overFontColor != null) this.overFontColor = new Color(style.overFontColor);
    123 			if (style.checkedFontColor != null) this.checkedFontColor = new Color(style.checkedFontColor);
    124 			if (style.checkedOverFontColor != null) this.checkedFontColor = new Color(style.checkedOverFontColor);
    125 			if (style.disabledFontColor != null) this.disabledFontColor = new Color(style.disabledFontColor);
    126 		}
    127 	}
    128 }
    129