1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Component;
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7 | import java.awt.Dialog.ModalityType;
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8 | import java.awt.GraphicsEnvironment;
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9 | import java.awt.event.ActionEvent;
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10 | import java.awt.event.WindowAdapter;
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11 | import java.awt.event.WindowEvent;
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12 | import java.util.ArrayList;
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13 | import java.util.Collection;
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14 | import java.util.HashSet;
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15 | import java.util.List;
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16 |
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17 | import javax.swing.AbstractAction;
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18 | import javax.swing.Action;
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19 | import javax.swing.Icon;
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20 | import javax.swing.JButton;
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21 | import javax.swing.JDialog;
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22 | import javax.swing.JOptionPane;
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23 | import javax.swing.event.ChangeEvent;
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24 | import javax.swing.event.ChangeListener;
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25 |
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26 | import org.openstreetmap.josm.gui.help.HelpBrowser;
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27 | import org.openstreetmap.josm.gui.help.HelpUtil;
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28 | import org.openstreetmap.josm.gui.util.GuiHelper;
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29 | import org.openstreetmap.josm.gui.util.WindowGeometry;
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30 | import org.openstreetmap.josm.gui.widgets.JMultilineLabel;
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31 | import org.openstreetmap.josm.tools.ImageProvider;
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32 | import org.openstreetmap.josm.tools.InputMapUtils;
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33 | import org.openstreetmap.josm.tools.Logging;
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34 |
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35 | /**
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36 | * Utility methods that display an option dialog with an additional help button that links to the JOSM help
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37 | */
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38 | public final class HelpAwareOptionPane {
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39 |
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40 | private HelpAwareOptionPane() {
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41 | // Hide default constructor for utils classes
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42 | }
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43 |
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44 | /**
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45 | * A specification of a button that should be added to the options dialog
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46 | */
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47 | public static class ButtonSpec {
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48 | /**
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49 | * the button text
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50 | */
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51 | public final String text;
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52 | /**
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53 | * the icon to display. Can be <code>null</code>
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54 | */
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55 | public final Icon icon;
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56 | /**
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57 | * The tooltip to display when hovering the button
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58 | */
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59 | public final String tooltipText;
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60 | /**
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61 | * The help topic to link
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62 | */
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63 | public final String helpTopic;
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64 | private boolean enabled;
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65 |
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66 | private final Collection<ChangeListener> listeners = new HashSet<>();
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67 |
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68 | /**
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69 | * Constructs a new {@code ButtonSpec}.
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70 | * @param text the button text
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71 | * @param icon the icon to display. Can be null
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72 | * @param tooltipText the tooltip text. Can be null.
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73 | * @param helpTopic the help topic. Can be null.
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74 | */
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75 | public ButtonSpec(String text, Icon icon, String tooltipText, String helpTopic) {
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76 | this(text, icon, tooltipText, helpTopic, true);
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77 | }
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78 |
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79 | /**
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80 | * Constructs a new {@code ButtonSpec}.
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81 | * @param text the button text
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82 | * @param icon the icon to display. Can be null
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83 | * @param tooltipText the tooltip text. Can be null.
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84 | * @param helpTopic the help topic. Can be null.
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85 | * @param enabled the enabled status
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86 | * @since 5951
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87 | */
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88 | public ButtonSpec(String text, Icon icon, String tooltipText, String helpTopic, boolean enabled) {
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89 | this.text = text;
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90 | this.icon = icon;
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91 | this.tooltipText = tooltipText;
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92 | this.helpTopic = helpTopic;
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93 | setEnabled(enabled);
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94 | }
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95 |
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96 | /**
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97 | * Determines if this button spec is enabled
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98 | * @return {@code true} if this button spec is enabled, {@code false} otherwise
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99 | * @since 6051
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100 | */
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101 | public final boolean isEnabled() {
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102 | return enabled;
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103 | }
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104 |
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105 | /**
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106 | * Enables or disables this button spec, depending on the value of the parameter {@code b}.
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107 | * @param enabled if {@code true}, this button spec is enabled; otherwise this button spec is disabled
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108 | * @since 6051
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109 | */
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110 | public final void setEnabled(boolean enabled) {
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111 | if (this.enabled != enabled) {
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112 | this.enabled = enabled;
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113 | ChangeEvent event = new ChangeEvent(this);
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114 | for (ChangeListener listener : listeners) {
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115 | listener.stateChanged(event);
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116 | }
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117 | }
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118 | }
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119 |
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120 | private boolean addChangeListener(ChangeListener listener) {
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121 | return listener != null && listeners.add(listener);
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122 | }
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123 | }
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124 |
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125 | private static class DefaultAction extends AbstractAction {
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126 | private final JDialog dialog;
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127 | private final JOptionPane pane;
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128 | private final int value;
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129 |
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130 | DefaultAction(JDialog dialog, JOptionPane pane, int value) {
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131 | this.dialog = dialog;
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132 | this.pane = pane;
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133 | this.value = value;
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134 | }
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135 |
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136 | @Override
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137 | public void actionPerformed(ActionEvent e) {
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138 | pane.setValue(value);
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139 | dialog.setVisible(false);
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140 | }
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141 | }
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142 |
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143 | /**
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144 | * Creates the list buttons to be displayed in the option pane dialog.
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145 | *
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146 | * @param options the option. If null, just creates an OK button and a help button
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147 | * @param helpTopic the help topic. The context sensitive help of all buttons is equal
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148 | * to the context sensitive help of the whole dialog
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149 | * @return the list of buttons
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150 | */
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151 | private static List<JButton> createOptionButtons(ButtonSpec[] options, String helpTopic) {
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152 | List<JButton> buttons = new ArrayList<>();
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153 | if (options == null) {
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154 | JButton b = new JButton(tr("OK"));
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155 | b.setIcon(ImageProvider.get("ok"));
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156 | b.setToolTipText(tr("Click to close the dialog"));
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157 | b.setFocusable(true);
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158 | buttons.add(b);
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159 | } else {
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160 | for (final ButtonSpec spec: options) {
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161 | final JButton b = new JButton(spec.text);
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162 | b.setIcon(spec.icon);
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163 | b.setToolTipText(spec.tooltipText == null ? "" : spec.tooltipText);
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164 | if (helpTopic != null) {
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165 | HelpUtil.setHelpContext(b, helpTopic);
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166 | }
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167 | b.setFocusable(true);
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168 | b.setEnabled(spec.isEnabled());
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169 | spec.addChangeListener(e -> b.setEnabled(spec.isEnabled()));
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170 | buttons.add(b);
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171 | }
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172 | }
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173 | return buttons;
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174 | }
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175 |
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176 | /**
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177 | * Creates the help button
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178 | *
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179 | * @param helpTopic the help topic
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180 | * @return the help button
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181 | */
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182 | private static JButton createHelpButton(final String helpTopic) {
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183 | JButton b = new JButton(tr("Help"));
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184 | b.setIcon(ImageProvider.get("help"));
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185 | b.setToolTipText(tr("Show help information"));
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186 | HelpUtil.setHelpContext(b, helpTopic);
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187 | Action a = new AbstractAction() {
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188 | @Override
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189 | public void actionPerformed(ActionEvent e) {
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190 | HelpBrowser.setUrlForHelpTopic(helpTopic);
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191 | }
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192 | };
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193 | b.addActionListener(a);
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194 | InputMapUtils.enableEnter(b);
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195 | return b;
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196 | }
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197 |
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198 | /**
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199 | * Displays an option dialog which is aware of a help context. If <code>helpTopic</code> isn't null,
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200 | * the dialog includes a "Help" button and launches the help browser if the user presses F1. If the
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201 | * user clicks on the "Help" button the option dialog remains open and JOSM launches the help
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202 | * browser.
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203 | *
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204 | * <code>helpTopic</code> is the trailing part of a JOSM online help URL, i.e. the part after the leading
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205 | * <code>https://josm.openstreetmap.de/wiki/Help</code>. It should start with a leading '/' and it
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206 | * may include an anchor after a '#'.
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207 | *
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208 | * <strong>Examples</strong>
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209 | * <ul>
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210 | * <li>/Dialogs/RelationEditor</li>
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211 | * <li>/Dialogs/RelationEditor#ConflictInData</li>
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212 | * </ul>
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213 | *
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214 | * In addition, the option buttons display JOSM icons, similar to ExtendedDialog.
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215 | *
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216 | * @param parentComponent the parent component
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217 | * @param msg the message
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218 | * @param title the title
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219 | * @param messageType the message type (see {@link JOptionPane})
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220 | * @param icon the icon to display. Can be null.
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221 | * @param options the list of options to display. Can be null.
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222 | * @param defaultOption the default option. Can be null.
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223 | * @param helpTopic the help topic. Can be null.
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224 | * @return the index of the selected option or {@link JOptionPane#CLOSED_OPTION}
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225 | */
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226 | public static int showOptionDialog(Component parentComponent, Object msg, String title, int messageType,
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227 | Icon icon, final ButtonSpec[] options, final ButtonSpec defaultOption, final String helpTopic) {
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228 | final List<JButton> buttons = createOptionButtons(options, helpTopic);
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229 | if (helpTopic != null) {
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230 | buttons.add(createHelpButton(helpTopic));
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231 | }
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232 |
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233 | JButton defaultButton = null;
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234 | if (options != null && defaultOption != null) {
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235 | for (int i = 0; i < options.length; i++) {
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236 | if (options[i] == defaultOption) {
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237 | defaultButton = buttons.get(i);
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238 | break;
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239 | }
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240 | }
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241 | }
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242 |
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243 | final JOptionPane pane = new JOptionPane(
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244 | msg instanceof String ? new JMultilineLabel((String) msg, true) : msg,
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245 | messageType,
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246 | JOptionPane.DEFAULT_OPTION,
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247 | icon,
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248 | buttons.toArray(),
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249 | defaultButton
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250 | );
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251 |
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252 | // Log message. Useful for bug reports and unit tests
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253 | switch (messageType) {
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254 | case JOptionPane.ERROR_MESSAGE:
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255 | Logging.error(title + " - " + msg);
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256 | break;
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257 | case JOptionPane.WARNING_MESSAGE:
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258 | Logging.warn(title + " - " + msg);
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259 | break;
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260 | default:
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261 | Logging.info(title + " - " + msg);
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262 | }
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263 |
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264 | if (!GraphicsEnvironment.isHeadless()) {
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265 | doShowOptionDialog(parentComponent, title, options, defaultOption, helpTopic, buttons, pane);
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266 | }
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267 | return pane.getValue() instanceof Integer ? (Integer) pane.getValue() : JOptionPane.OK_OPTION;
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268 | }
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269 |
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270 | private static void doShowOptionDialog(Component parentComponent, String title, final ButtonSpec[] options,
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271 | final ButtonSpec defaultOption, final String helpTopic, final List<JButton> buttons,
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272 | final JOptionPane pane) {
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273 | final JDialog dialog = new JDialog(
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274 | GuiHelper.getFrameForComponent(parentComponent),
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275 | title,
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276 | ModalityType.DOCUMENT_MODAL
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277 | );
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278 | dialog.setContentPane(pane);
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279 | dialog.addWindowListener(new WindowAdapter() {
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280 | @Override
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281 | public void windowClosing(WindowEvent e) {
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282 | pane.setValue(JOptionPane.CLOSED_OPTION);
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283 | super.windowClosed(e);
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284 | }
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285 |
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286 | @Override
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287 | public void windowOpened(WindowEvent e) {
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288 | if (defaultOption != null && options != null && options.length > 0) {
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289 | int i;
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290 | for (i = 0; i < options.length; i++) {
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291 | if (options[i] == defaultOption) {
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292 | break;
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293 | }
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294 | }
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295 | if (i >= options.length) {
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296 | buttons.get(0).requestFocusInWindow();
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297 | }
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298 | buttons.get(i).requestFocusInWindow();
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299 | } else {
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300 | buttons.get(0).requestFocusInWindow();
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301 | }
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302 | }
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303 | });
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304 | InputMapUtils.addEscapeAction(dialog.getRootPane(), new AbstractAction() {
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305 | @Override
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306 | public void actionPerformed(ActionEvent e) {
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307 | pane.setValue(JOptionPane.CLOSED_OPTION);
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308 | dialog.setVisible(false);
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309 | }
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310 | });
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311 |
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312 | if (options != null) {
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313 | for (int i = 0; i < options.length; i++) {
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314 | final DefaultAction action = new DefaultAction(dialog, pane, i);
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315 | buttons.get(i).addActionListener(action);
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316 | InputMapUtils.addEnterAction(buttons.get(i), action);
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317 | }
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318 | } else {
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319 | final DefaultAction action = new DefaultAction(dialog, pane, 0);
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320 | buttons.get(0).addActionListener(action);
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321 | InputMapUtils.addEnterAction(buttons.get(0), action);
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322 | }
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323 |
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324 | dialog.pack();
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325 | WindowGeometry.centerOnScreen(dialog.getSize()).applySafe(dialog);
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326 | if (helpTopic != null) {
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327 | HelpUtil.setHelpContext(dialog.getRootPane(), helpTopic);
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328 | }
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329 | dialog.setVisible(true);
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330 | }
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331 |
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332 | /**
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333 | * Displays an option dialog which is aware of a help context.
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334 | *
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335 | * @param parentComponent the parent component
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336 | * @param msg the message
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337 | * @param title the title
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338 | * @param messageType the message type (see {@link JOptionPane})
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339 | * @param helpTopic the help topic. Can be null.
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340 | * @return the index of the selected option or {@link JOptionPane#CLOSED_OPTION}
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341 | * @see #showOptionDialog(Component, Object, String, int, Icon, ButtonSpec[], ButtonSpec, String)
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342 | */
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343 | public static int showOptionDialog(Component parentComponent, Object msg, String title, int messageType, String helpTopic) {
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344 | return showOptionDialog(parentComponent, msg, title, messageType, null, null, null, helpTopic);
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345 | }
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346 |
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347 | /**
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348 | * Run it in Event Dispatch Thread.
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349 | * This version does not return anything, so it is more like {@code showMessageDialog}.
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350 | *
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351 | * It can be used, when you need to show a message dialog from a worker thread,
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352 | * e.g. from {@code PleaseWaitRunnable}.
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353 | *
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354 | * @param parentComponent the parent component
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355 | * @param msg the message
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356 | * @param title the title
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357 | * @param messageType the message type (see {@link JOptionPane})
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358 | * @param helpTopic the help topic. Can be null.
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359 | */
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360 | public static void showMessageDialogInEDT(final Component parentComponent, final Object msg, final String title,
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361 | final int messageType, final String helpTopic) {
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362 | GuiHelper.runInEDT(() -> showOptionDialog(parentComponent, msg, title, messageType, null, null, null, helpTopic));
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363 | }
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364 | }
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