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1 package com.glavsoft.viewer.swing.gui;
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2
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3 import javax.swing.*;
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4 import javax.swing.text.AttributeSet;
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5 import javax.swing.text.BadLocationException;
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6 import javax.swing.text.JTextComponent;
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7 import javax.swing.text.PlainDocument;
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8 import java.awt.event.ActionEvent;
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9 import java.awt.event.ActionListener;
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10 import java.awt.event.FocusAdapter;
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11 import java.awt.event.FocusEvent;
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12
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13 /**
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14 * @author dime at tightvnc.com
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15 *
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16 * Using idea by Thomas Bierhance from http://www.orbital-computer.de/JComboBox/
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17 */
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18 public class AutoCompletionComboEditorDocument extends PlainDocument {
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19
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20 private ComboBoxModel model;
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21 private boolean selecting;
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22 private JComboBox comboBox;
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23 private final boolean hidePopupOnFocusLoss;
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24 private JTextComponent editor;
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25
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26 public AutoCompletionComboEditorDocument(final JComboBox comboBox) {
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27 this.comboBox = comboBox;
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28 this.model = comboBox.getModel();
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29 this.editor = (JTextComponent)comboBox.getEditor().getEditorComponent();
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30 editor.setDocument(this);
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31 comboBox.addActionListener(new ActionListener() {
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32 @Override
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33 public void actionPerformed(ActionEvent e) {
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34 if (!selecting) highlightCompletedText(0);
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35 }
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36 });
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37
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38 Object selectedItem = comboBox.getSelectedItem();
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39 if (selectedItem!=null) {
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40 setText(selectedItem.toString());
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41 highlightCompletedText(0);
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42 }
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43 hidePopupOnFocusLoss = System.getProperty("java.version").startsWith("1.5");
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44 editor.addFocusListener(new FocusAdapter() {
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45 @Override
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46 public void focusLost(FocusEvent e) {
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47 if (hidePopupOnFocusLoss) comboBox.setPopupVisible(false);
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48 }
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49 });
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50 }
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51
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52 @Override
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53 public void remove(int offs, int len) throws BadLocationException {
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54 if (selecting) return;
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55 super.remove(offs, len);
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56 }
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57
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58 @Override
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59 public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
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60 if (selecting) return;
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61 super.insertString(offs, str, a);
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62 Object item = lookupItem(getText(0, getLength()));
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63 if (item != null) {
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64 setSelectedItem(item);
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65 setText(item.toString());
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66 highlightCompletedText(offs + str.length());
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67 if (comboBox.isDisplayable()) comboBox.setPopupVisible(true);
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68 }
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69 }
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70
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71 private void setText(String text) {
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72 try {
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73 super.remove(0, getLength());
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74 super.insertString(0, text, null);
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75 } catch (BadLocationException e) {
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76 throw new RuntimeException(e);
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77 }
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78 }
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79
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80 private void setSelectedItem(Object item) {
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81 selecting = true;
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82 model.setSelectedItem(item);
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83 selecting = false;
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84 }
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85
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86 private void highlightCompletedText(int offs) {
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87 JTextComponent editor = (JTextComponent) comboBox.getEditor().getEditorComponent();
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88 editor.setSelectionStart(offs);
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89 editor.setSelectionEnd(getLength());
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90 }
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91
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92 private Object lookupItem(String pattern) {
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93 Object selectedItem = model.getSelectedItem();
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94 if (selectedItem != null && startsWithIgnoreCase(selectedItem, pattern)) {
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95 return selectedItem;
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96 } else {
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97 for (int i = 0, n = model.getSize(); i < n; i++) {
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98 Object currentItem = model.getElementAt(i);
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99 if (startsWithIgnoreCase(currentItem, pattern)) {
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100 return currentItem;
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101 }
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102 }
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103 }
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104 return null;
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105 }
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106
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107 private boolean startsWithIgnoreCase(Object currentItem, String pattern) {
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108 return currentItem.toString().toLowerCase().startsWith(pattern.toLowerCase());
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109 }
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110
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111
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112 }
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