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1 // Written in the D programming language
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2 // www.digitalmars.com/d/
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3
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4 /*
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5 * The contents of this file are subject to the Mozilla Public License Version
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6 * 1.1 (the "License"); you may not use this file except in compliance with
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7 * the License. You may obtain a copy of the License at
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8 * http://www.mozilla.org/MPL/
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9 *
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10 * Software distributed under the License is distributed on an "AS IS" basis,
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11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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12 * for the specific language governing rights and limitations under the
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13 * License.
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14 *
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15 * The Original Code is the Dynamin library.
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16 *
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17 * The Initial Developer of the Original Code is Jordan Miner.
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18 * Portions created by the Initial Developer are Copyright (C) 2007-2009
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19 * the Initial Developer. All Rights Reserved.
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20 *
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21 * Contributor(s):
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22 * Jordan Miner <jminer7@gmail.com>
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23 *
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24 */
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25
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26 module dynamin.gui.radio_button;
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27
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28 import dynamin.all_core;
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29 import dynamin.all_gui;
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30 import dynamin.all_painting;
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31 import tango.io.Stdout;
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32
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33 /**
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34 * A control that can be checked only if other radio buttons are unchecked.
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35 *
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36 * The appearance of a radio button with Windows Classic:
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37 *
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38 * $(IMAGE ../web/example_radio_button.png)
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39 */
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40 class RadioButton : CheckBox {
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41 protected:
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42 int _group = 1;
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43 RadioButton[] collectGroup(ref int checkedIndex) {
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44 Window topLevel = cast(Window)getTopLevel();
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45 if(!topLevel)
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46 return null;
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47 RadioButton[] radios;
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48 void collectFromPanel(Panel container) {
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49 foreach(control; container) {
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50 if(auto r = cast(RadioButton)control) {
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51 if(r.group != group)
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52 continue;
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53 radios.length = radios.length + 1;
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54 radios[$-1] = r;
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55 if(r.checked)
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56 checkedIndex = radios.length-1;
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57 } else if(auto c = cast(Panel)control)
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58 collectFromPanel(c);
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59 }
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60 }
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61 checkedIndex = -1;
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62 collectFromPanel(topLevel.content);
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63 return radios;
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64 }
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65 override void whenKeyDown(KeyEventArgs e) {
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66 // TODO: when GetTopLevel() is changed to return NativeControl,
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67 // update this
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68 int index;
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69 RadioButton[] radios = collectGroup(index);
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70 if(radios is null)
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71 return;
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72 if(e.key == Key.Down || e.key == Key.Right) {
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73 if(++index >= radios.length)
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74 index = 0;
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75 } else if(e.key == Key.Up || e.key == Key.Left) {
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76 if(--index < 0)
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77 index = radios.length-1;
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78 }
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79 radios[index].clicked(new EventArgs);
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80 }
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81 override void whenPainting(PaintingEventArgs e) {
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82 Theme.current.RadioButton_paint(this, e.graphics);
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83 }
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84 override void whenClicked(EventArgs e) {
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85 int index;
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86 RadioButton[] radios = collectGroup(index);
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87 foreach(r; radios)
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88 r.checked = false;
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89 checked = true;
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90 focus();
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91
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92 }
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93 public:
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94 this() {
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95 }
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96 this(string text) {
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97 this();
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98 this.text = text;
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99 }
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100 override Size bestSize() {
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101 return Size(70, 15);
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102 }
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103 /**
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104 * Gets or sets what group this radio button is a part of. The default is 1.
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105 */
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106 int group() { return _group; }
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107 /// ditto
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108 void group(int i) { _group = i; }
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109 }
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