src/jexer/TPasswordField.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * License: LGPLv3 or later
   5  *
   6  * This module is licensed under the GNU Lesser General Public License
   7  * Version 3.  Please see the file "COPYING" in this directory for more
   8  * information about the GNU Lesser General Public License Version 3.
   9  *
  10  *     Copyright (C) 2015  Kevin Lamonte
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public License
  14  * as published by the Free Software Foundation; either version 3 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this program; if not, see
  24  * http://www.gnu.org/licenses/, or write to the Free Software
  25  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  26  * 02110-1301 USA
  27  *
  28  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  29  * @version 1
  30  */
  31 package jexer;
  32
  33 import jexer.bits.CellAttributes;
  34 import jexer.bits.GraphicsChars;
  35
  36 /**
  37  * TField implements an editable text field.
  38  */
  39 public final class TPasswordField extends TField {
  40
  41     /**
  42      * Public constructor.
  43      *
  44      * @param parent parent widget
  45      * @param x column relative to parent
  46      * @param y row relative to parent
  47      * @param width visible text width
  48      * @param fixed if true, the text cannot exceed the display width
  49      */
  50     public TPasswordField(final TWidget parent, final int x, final int y,
  51         final int width, final boolean fixed) {
  52
  53         this(parent, x, y, width, fixed, "", null, null);
  54     }
  55
  56     /**
  57      * Public constructor.
  58      *
  59      * @param parent parent widget
  60      * @param x column relative to parent
  61      * @param y row relative to parent
  62      * @param width visible text width
  63      * @param fixed if true, the text cannot exceed the display width
  64      * @param text initial text, default is empty string
  65      */
  66     public TPasswordField(final TWidget parent, final int x, final int y,
  67         final int width, final boolean fixed, final String text) {
  68
  69         this(parent, x, y, width, fixed, text, null, null);
  70     }
  71
  72     /**
  73      * Public constructor.
  74      *
  75      * @param parent parent widget
  76      * @param x column relative to parent
  77      * @param y row relative to parent
  78      * @param width visible text width
  79      * @param fixed if true, the text cannot exceed the display width
  80      * @param text initial text, default is empty string
  81      * @param enterAction function to call when enter key is pressed
  82      * @param updateAction function to call when the text is updated
  83      */
  84     public TPasswordField(final TWidget parent, final int x, final int y,
  85         final int width, final boolean fixed, final String text,
  86         final TAction enterAction, final TAction updateAction) {
  87
  88         // Set parent and window
  89         super(parent, x, y, width, fixed, text, enterAction, updateAction);
  90     }
  91
  92     /**
  93      * Draw the text field.
  94      */
  95     @Override
  96     public void draw() {
  97         CellAttributes fieldColor;
  98
  99         boolean showStars = false;
 100         if (isAbsoluteActive()) {
 101             fieldColor = getTheme().getColor("tfield.active");
 102         } else {
 103             fieldColor = getTheme().getColor("tfield.inactive");
 104             showStars = true;
 105         }
 106
 107         int end = windowStart + getWidth();
 108         if (end > text.length()) {
 109             end = text.length();
 110         }
 111
 112         getScreen().hLineXY(0, 0, getWidth(), GraphicsChars.HATCH, fieldColor);
 113         if (showStars) {
 114             getScreen().hLineXY(0, 0, getWidth() - 2, '*',
 115                 fieldColor);
 116         } else {
 117             getScreen().putStringXY(0, 0, text.substring(windowStart, end),
 118                 fieldColor);
 119         }
 120
 121         // Fix the cursor, it will be rendered by TApplication.drawAll().
 122         updateCursor();
 123     }
 124
 125 }