src/jexer/TLabel.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * The MIT License (MIT)
   5  *
   6  * Copyright (C) 2019 Kevin Lamonte
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  27  * @version 1
  28  */
  29 package jexer;
  30
  31 import jexer.bits.CellAttributes;
  32 import jexer.bits.MnemonicString;
  33
  34 /**
  35  * TLabel implements a simple label, with an optional mnemonic hotkey action
  36  * associated with it.
  37  */
  38 public class TLabel extends TWidget {
  39
  40     // ------------------------------------------------------------------------
  41     // Variables --------------------------------------------------------------
  42     // ------------------------------------------------------------------------
  43
  44     /**
  45      * The shortcut and label.
  46      */
  47     private MnemonicString mnemonic;
  48
  49     /**
  50      * The action to perform when the mnemonic shortcut is pressed.
  51      */
  52     private TAction action;
  53
  54     /**
  55      * Label color.
  56      */
  57     private String colorKey;
  58
  59     /**
  60      * If true, use the window's background color.
  61      */
  62     private boolean useWindowBackground = true;
  63
  64     // ------------------------------------------------------------------------
  65     // Constructors -----------------------------------------------------------
  66     // ------------------------------------------------------------------------
  67
  68     /**
  69      * Public constructor, using the default "tlabel" for colorKey.
  70      *
  71      * @param parent parent widget
  72      * @param text label on the screen
  73      * @param x column relative to parent
  74      * @param y row relative to parent
  75      */
  76     public TLabel(final TWidget parent, final String text, final int x,
  77         final int y) {
  78
  79         this(parent, text, x, y, "tlabel");
  80     }
  81
  82     /**
  83      * Public constructor, using the default "tlabel" for colorKey.
  84      *
  85      * @param parent parent widget
  86      * @param text label on the screen
  87      * @param x column relative to parent
  88      * @param y row relative to parent
  89      * @param action to call when shortcut is pressed
  90      */
  91     public TLabel(final TWidget parent, final String text, final int x,
  92         final int y, final TAction action) {
  93
  94         this(parent, text, x, y, "tlabel", action);
  95     }
  96
  97     /**
  98      * Public constructor.
  99      *
 100      * @param parent parent widget
 101      * @param text label on the screen
 102      * @param x column relative to parent
 103      * @param y row relative to parent
 104      * @param colorKey ColorTheme key color to use for foreground text
 105      */
 106     public TLabel(final TWidget parent, final String text, final int x,
 107         final int y, final String colorKey) {
 108
 109         this(parent, text, x, y, colorKey, true);
 110     }
 111
 112     /**
 113      * Public constructor.
 114      *
 115      * @param parent parent widget
 116      * @param text label on the screen
 117      * @param x column relative to parent
 118      * @param y row relative to parent
 119      * @param colorKey ColorTheme key color to use for foreground text
 120      * @param action to call when shortcut is pressed
 121      */
 122     public TLabel(final TWidget parent, final String text, final int x,
 123         final int y, final String colorKey, final TAction action) {
 124
 125         this(parent, text, x, y, colorKey, true, action);
 126     }
 127
 128     /**
 129      * Public constructor.
 130      *
 131      * @param parent parent widget
 132      * @param text label on the screen
 133      * @param x column relative to parent
 134      * @param y row relative to parent
 135      * @param colorKey ColorTheme key color to use for foreground text
 136      * @param useWindowBackground if true, use the window's background color
 137      */
 138     public TLabel(final TWidget parent, final String text, final int x,
 139         final int y, final String colorKey, final boolean useWindowBackground) {
 140
 141         this(parent, text, x, y, colorKey, useWindowBackground, null);
 142     }
 143
 144     /**
 145      * Public constructor.
 146      *
 147      * @param parent parent widget
 148      * @param text label on the screen
 149      * @param x column relative to parent
 150      * @param y row relative to parent
 151      * @param colorKey ColorTheme key color to use for foreground text
 152      * @param useWindowBackground if true, use the window's background color
 153      * @param action to call when shortcut is pressed
 154      */
 155     public TLabel(final TWidget parent, final String text, final int x,
 156         final int y, final String colorKey, final boolean useWindowBackground,
 157         final TAction action) {
 158
 159         // Set parent and window
 160         super(parent, false, x, y, text.length(), 1);
 161
 162         mnemonic = new MnemonicString(text);
 163         this.colorKey = colorKey;
 164         this.useWindowBackground = useWindowBackground;
 165         this.action = action;
 166     }
 167
 168     // ------------------------------------------------------------------------
 169     // TWidget ----------------------------------------------------------------
 170     // ------------------------------------------------------------------------
 171
 172     /**
 173      * Draw a static label.
 174      */
 175     @Override
 176     public void draw() {
 177         // Setup my color
 178         CellAttributes color = new CellAttributes();
 179         CellAttributes mnemonicColor = new CellAttributes();
 180         color.setTo(getTheme().getColor(colorKey));
 181         mnemonicColor.setTo(getTheme().getColor("tlabel.mnemonic"));
 182         if (useWindowBackground) {
 183             CellAttributes background = getWindow().getBackground();
 184             color.setBackColor(background.getBackColor());
 185             mnemonicColor.setBackColor(background.getBackColor());
 186         }
 187         putStringXY(0, 0, mnemonic.getRawLabel(), color);
 188         if (mnemonic.getShortcutIdx() >= 0) {
 189             putCharXY(mnemonic.getShortcutIdx(), 0,
 190                 mnemonic.getShortcut(), mnemonicColor);
 191         }
 192     }
 193
 194     // ------------------------------------------------------------------------
 195     // TLabel -----------------------------------------------------------------
 196     // ------------------------------------------------------------------------
 197
 198     /**
 199      * Get label raw text.
 200      *
 201      * @return label text
 202      */
 203     public String getLabel() {
 204         return mnemonic.getRawLabel();
 205     }
 206
 207     /**
 208      * Get the mnemonic string for this label.
 209      *
 210      * @return mnemonic string
 211      */
 212     public MnemonicString getMnemonic() {
 213         return mnemonic;
 214     }
 215
 216     /**
 217      * Set label text.
 218      *
 219      * @param label new label text
 220      */
 221     public void setLabel(final String label) {
 222         mnemonic = new MnemonicString(label);
 223     }
 224
 225     /**
 226      * Act as though the mnemonic shortcut was pressed.
 227      */
 228     public void dispatch() {
 229         if (action != null) {
 230             action.DO();
 231         }
 232     }
 233
 234 }