| 1 | /* |
| 2 | * Jexer - Java Text User Interface |
| 3 | * |
| 4 | * The MIT License (MIT) |
| 5 | * |
| 6 | * Copyright (C) 2017 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 | |
| 33 | /** |
| 34 | * TRadioGroup is a collection of TRadioButtons with a box and label. |
| 35 | */ |
| 36 | public final class TRadioGroup extends TWidget { |
| 37 | |
| 38 | /** |
| 39 | * Label for this radio button group. |
| 40 | */ |
| 41 | private String label; |
| 42 | |
| 43 | /** |
| 44 | * Only one of my children can be selected. |
| 45 | */ |
| 46 | private TRadioButton selectedButton = null; |
| 47 | |
| 48 | /** |
| 49 | * Get the radio button ID that was selected. |
| 50 | * |
| 51 | * @return ID of the selected button, or 0 if no button is selected |
| 52 | */ |
| 53 | public int getSelected() { |
| 54 | if (selectedButton == null) { |
| 55 | return 0; |
| 56 | } |
| 57 | return selectedButton.getId(); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Set the new selected radio button. Note package private access. |
| 62 | * |
| 63 | * @param button new button that became selected |
| 64 | */ |
| 65 | void setSelected(final TRadioButton button) { |
| 66 | assert (button.isSelected()); |
| 67 | if (selectedButton != null) { |
| 68 | selectedButton.setSelected(false); |
| 69 | } |
| 70 | selectedButton = button; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Public constructor. |
| 75 | * |
| 76 | * @param parent parent widget |
| 77 | * @param x column relative to parent |
| 78 | * @param y row relative to parent |
| 79 | * @param label label to display on the group box |
| 80 | */ |
| 81 | public TRadioGroup(final TWidget parent, final int x, final int y, |
| 82 | final String label) { |
| 83 | |
| 84 | // Set parent and window |
| 85 | super(parent, x, y, label.length() + 4, 2); |
| 86 | |
| 87 | this.label = label; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Draw a radio button with label. |
| 92 | */ |
| 93 | @Override |
| 94 | public void draw() { |
| 95 | CellAttributes radioGroupColor; |
| 96 | |
| 97 | if (isAbsoluteActive()) { |
| 98 | radioGroupColor = getTheme().getColor("tradiogroup.active"); |
| 99 | } else { |
| 100 | radioGroupColor = getTheme().getColor("tradiogroup.inactive"); |
| 101 | } |
| 102 | |
| 103 | getScreen().drawBox(0, 0, getWidth(), getHeight(), |
| 104 | radioGroupColor, radioGroupColor, 3, false); |
| 105 | |
| 106 | getScreen().hLineXY(1, 0, label.length() + 2, ' ', radioGroupColor); |
| 107 | getScreen().putStringXY(2, 0, label, radioGroupColor); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Convenience function to add a radio button to this group. |
| 112 | * |
| 113 | * @param label label to display next to (right of) the radiobutton |
| 114 | * @return the new radio button |
| 115 | */ |
| 116 | public TRadioButton addRadioButton(final String label) { |
| 117 | int buttonX = 1; |
| 118 | int buttonY = getChildren().size() + 1; |
| 119 | if (label.length() + 4 > getWidth()) { |
| 120 | setWidth(label.length() + 7); |
| 121 | } |
| 122 | setHeight(getChildren().size() + 3); |
| 123 | return new TRadioButton(this, buttonX, buttonY, label, |
| 124 | getChildren().size() + 1); |
| 125 | } |
| 126 | |
| 127 | } |