1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.widgets;
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3 |
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4 | import java.awt.BorderLayout;
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5 | import java.awt.event.ActionListener;
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6 | import java.awt.event.KeyAdapter;
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7 | import java.awt.event.KeyEvent;
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8 | import java.awt.event.MouseAdapter;
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9 | import java.awt.event.MouseEvent;
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10 | import java.util.ArrayList;
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11 | import java.util.List;
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12 |
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13 | import javax.swing.AbstractListModel;
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14 | import javax.swing.JList;
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15 | import javax.swing.JPanel;
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16 | import javax.swing.JScrollPane;
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17 | import javax.swing.ListSelectionModel;
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18 | import javax.swing.event.DocumentEvent;
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19 | import javax.swing.event.DocumentListener;
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20 | import javax.swing.event.ListSelectionListener;
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21 |
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22 | /**
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23 | * A panel containing a search text field and a list of results for that search text.
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24 | * @param <T> The class of the things that are searched
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25 | */
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26 | public abstract class SearchTextResultListPanel<T> extends JPanel {
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27 |
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28 | protected final JosmTextField edSearchText;
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29 | protected final JList<T> lsResult;
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30 | protected final ResultListModel<T> lsResultModel = new ResultListModel<>();
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31 |
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32 | protected final transient List<ListSelectionListener> listSelectionListeners = new ArrayList<>();
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33 |
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34 | private transient ActionListener dblClickListener;
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35 | private transient ActionListener clickListener;
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36 |
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37 | protected abstract void filterItems();
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38 |
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39 | /**
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40 | * Constructs a new {@code SearchTextResultListPanel}.
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41 | */
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42 | public SearchTextResultListPanel() {
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43 | super(new BorderLayout());
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44 |
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45 | edSearchText = new JosmTextField();
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46 | edSearchText.getDocument().addDocumentListener(new DocumentListener() {
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47 | @Override
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48 | public void removeUpdate(DocumentEvent e) {
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49 | filterItems();
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50 | }
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51 |
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52 | @Override
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53 | public void insertUpdate(DocumentEvent e) {
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54 | filterItems();
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55 | }
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56 |
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57 | @Override
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58 | public void changedUpdate(DocumentEvent e) {
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59 | filterItems();
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60 | }
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61 | });
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62 | edSearchText.addKeyListener(new KeyAdapter() {
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63 | @Override
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64 | public void keyPressed(KeyEvent e) {
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65 | switch (e.getKeyCode()) {
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66 | case KeyEvent.VK_DOWN:
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67 | selectItem(lsResult.getSelectedIndex() + 1);
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68 | break;
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69 | case KeyEvent.VK_UP:
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70 | selectItem(lsResult.getSelectedIndex() - 1);
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71 | break;
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72 | case KeyEvent.VK_PAGE_DOWN:
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73 | selectItem(lsResult.getSelectedIndex() + 10);
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74 | break;
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75 | case KeyEvent.VK_PAGE_UP:
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76 | selectItem(lsResult.getSelectedIndex() - 10);
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77 | break;
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78 | case KeyEvent.VK_HOME:
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79 | selectItem(0);
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80 | break;
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81 | case KeyEvent.VK_END:
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82 | selectItem(lsResultModel.getSize());
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83 | break;
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84 | default: // Do nothing
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85 | }
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86 | }
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87 | });
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88 | add(edSearchText, BorderLayout.NORTH);
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89 |
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90 | lsResult = new JList<>(lsResultModel);
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91 | lsResult.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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92 | lsResult.addMouseListener(new MouseAdapter() {
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93 | @Override
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94 | public void mouseClicked(MouseEvent e) {
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95 | if (e.getClickCount() > 1) {
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96 | if (dblClickListener != null)
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97 | dblClickListener.actionPerformed(null);
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98 | } else {
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99 | if (clickListener != null)
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100 | clickListener.actionPerformed(null);
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101 | }
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102 | }
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103 | });
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104 | add(new JScrollPane(lsResult), BorderLayout.CENTER);
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105 | }
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106 |
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107 | protected static class ResultListModel<T> extends AbstractListModel<T> {
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108 |
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109 | private transient List<T> items = new ArrayList<>();
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110 |
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111 | public synchronized void setItems(List<T> items) {
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112 | this.items = items;
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113 | fireContentsChanged(this, 0, Integer.MAX_VALUE);
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114 | }
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115 |
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116 | @Override
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117 | public synchronized T getElementAt(int index) {
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118 | return items.get(index);
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119 | }
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120 |
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121 | @Override
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122 | public synchronized int getSize() {
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123 | return items.size();
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124 | }
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125 |
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126 | public synchronized boolean isEmpty() {
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127 | return items.isEmpty();
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128 | }
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129 | }
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130 |
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131 | /**
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132 | * Initializes and clears the panel.
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133 | */
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134 | public synchronized void init() {
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135 | listSelectionListeners.clear();
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136 | edSearchText.setText("");
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137 | filterItems();
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138 | }
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139 |
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140 | private synchronized void selectItem(int newIndex) {
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141 | if (newIndex < 0) {
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142 | newIndex = 0;
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143 | }
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144 | if (newIndex > lsResultModel.getSize() - 1) {
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145 | newIndex = lsResultModel.getSize() - 1;
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146 | }
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147 | lsResult.setSelectedIndex(newIndex);
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148 | lsResult.ensureIndexIsVisible(newIndex);
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149 | }
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150 |
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151 | /**
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152 | * Clear the selected result
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153 | */
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154 | public synchronized void clearSelection() {
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155 | lsResult.clearSelection();
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156 | }
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157 |
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158 | /**
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159 | * Get the number of items available
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160 | * @return The number of search result items available
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161 | */
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162 | public synchronized int getItemCount() {
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163 | return lsResultModel.getSize();
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164 | }
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165 |
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166 | /**
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167 | * Sets a listener to be invoked on double click
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168 | * @param dblClickListener The double click listener
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169 | */
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170 | public void setDblClickListener(ActionListener dblClickListener) {
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171 | this.dblClickListener = dblClickListener;
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172 | }
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173 |
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174 | /**
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175 | * Sets a listener to be invoked on ssingle click
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176 | * @param clickListener The click listener
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177 | */
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178 | public void setClickListener(ActionListener clickListener) {
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179 | this.clickListener = clickListener;
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180 | }
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181 |
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182 | /**
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183 | * Adds a selection listener to the presets list.
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184 | *
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185 | * @param selectListener The list selection listener
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186 | * @since 7412
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187 | */
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188 | public synchronized void addSelectionListener(ListSelectionListener selectListener) {
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189 | lsResult.getSelectionModel().addListSelectionListener(selectListener);
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190 | listSelectionListeners.add(selectListener);
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191 | }
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192 |
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193 | /**
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194 | * Removes a selection listener from the presets list.
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195 | *
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196 | * @param selectListener The list selection listener
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197 | * @since 7412
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198 | */
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199 | public synchronized void removeSelectionListener(ListSelectionListener selectListener) {
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200 | listSelectionListeners.remove(selectListener);
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201 | lsResult.getSelectionModel().removeListSelectionListener(selectListener);
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202 | }
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203 | }
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