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1 // tools.js: Code to run all the tools in the menu bar.
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2 // References globals in hexagram.js to actually do the tools' work.
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3
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4 // To add a tool:
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5 // * Make a $(function() {...}); block to hold your code.
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6 // * Add a tool with add_tool with your tool code as the callback.
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7 // * Add at least one tool listener with add_tool_listener. Give it cleanup code
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8 // if necessary to remove temporary UI elements.
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9 // * Make sure to set selected_tool to undefined when your tool's normal
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10 // workflow completes, so that the infowindow can use click events again.
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11 // (it got set to your tool's name by the code prepended to your callback).
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12
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13 $(function() {
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14 // Set up the add text control
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15 add_tool("add-text", "Add Text...", function() {
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16
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17 // We'll prompt the user for some text, and then put a label where they
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18 // next click.
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19
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20 var text = prompt("Enter some text, and click anywhere on the " +
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21 "visualization to place it there", "Label Text");
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22
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23 if(!text) {
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24 // They don't want to put a label
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25 print("Not putting any text");
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26 selected_tool = undefined;
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27 return;
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28 }
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29
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30 // Add a tool listenerr that places the label. It fires on a click
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31 // anywhere on anything on the map, including the background. We keep a
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32 // handle to it so we can remove it when it fires, ensuring we get just
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33 // one label. See http://stackoverflow.com/a/1544185
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34 var handle = add_tool_listener("click", function(event) {
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35
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36 // Make a new MapLabel at the click position
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37 // See http://bit.ly/18MbLhR (the MapLabel library example page)
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38 var map_label = new MapLabel({
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39 text: text,
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40 position: event.latLng,
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41 map: googlemap,
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42 fontSize: 10,
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43 align: "left"
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44 });
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45
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46 // Subscribe tool listeners to the label
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47 subscribe_tool_listeners(map_label);
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48
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49 // Don't trigger again
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50 remove_tool_listener(handle);
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51 }, function() {
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52 // Cleanup: de-select ourselves.
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53 selected_tool = undefined;
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54 });
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55 });
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56 });
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57
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58 $(function() {
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59 // Set up the selection tool
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60 add_tool("select", "Select", function() {
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61
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62 // Turn on a crosshair cursor
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63 googlemap.setOptions({
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64 draggableCursor:"crosshair"
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65 });
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66
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67 // Add a listener to start the selection where the user clicks
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68 var start_handle = add_tool_listener("click",
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69 function(event) {
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70
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71 // Don't trigger again
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72 remove_tool_listener(start_handle);
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73
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74 // Turn on a crosshair cursor again
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75 googlemap.setOptions({
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76 draggableCursor:"crosshair"
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77 });
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78
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79 // Store the start of the selection
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80 var selection_start = event.latLng;
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81
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82 print("Selection started at " + selection_start);
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83
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84 // Make a rectangle for the selection
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85 var rectangle = new google.maps.Rectangle({
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86 fillColor: "#FFFFFF",
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87 strokeColor: "#FFFFFF",
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88 strokeWeight: 2,
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89 strokeOpacity: 1.0,
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90 fillOpacity: 0.5,
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91 // Don't give us a clickable cursor, or take mouse events.
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92 clickable: false,
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93 map: googlemap,
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94 bounds: new google.maps.LatLngBounds(selection_start,
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95 selection_start)
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96 });
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97
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98 // This holds a selection preview event handler that should happen
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99 // when we mouse over the map or the rectangle.
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100 var preview = function(event) {
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101
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102 // Store the end of the selection (provisionally)
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103 var selection_end = event.latLng;
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104
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105
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106 if(selection_end.lng() < selection_start.lng()) {
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107 // The user has selected a backwards rectangle, which wraps
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108 // across the place where the globe is cut. None of our
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109 // selections ever need to do this.
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110
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111 // Make the rectangle backwards
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112 rectangle.setBounds(new google.maps.LatLngBounds(
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113 selection_end, selection_start));
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114
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115 } else {
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116 // Make the rectangle forwards
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117 rectangle.setBounds(new google.maps.LatLngBounds(
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118 selection_start, selection_end));
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119 }
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120 }
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121
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122 // This holds a cleanup function to get rid of the rectangle when
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123 // the resizing listener goes away.
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124 var preview_cleanup = function() {
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125 // Remove the rectangle
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126 rectangle.setMap(undefined);
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127
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128 // Remove the crosshair cursor
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129 googlemap.setOptions({
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130 draggableCursor: undefined
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131 });
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132 };
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133
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134 // Add a mouse move listener for interactivity
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135 // Works over the map, hexes, or the rectangle.
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136 var move_handle = add_tool_listener("mousemove", preview,
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137 preview_cleanup);
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138
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139 // We need a listener to finish the selection
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140 var finish = function(event) {
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141 // Don't trigger again
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142 remove_tool_listener(stop_handle);
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143
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144 // Also stop the dynamic updates. This removes the rectangle.
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145 remove_tool_listener(move_handle);
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146
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147 // Store the end of the selection
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148 var selection_end = event.latLng;
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149
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150 print("Selection ended at " + selection_end);
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151
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152 // Select the rectangle by arbitrary corners.
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153 select_rectangle(selection_start, selection_end);
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154 };
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155
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156 // Attach the listener.
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157 // The listener can still use its own handle because variable
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158 // references are resolved at runtime.
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159 var stop_handle = add_tool_listener("click", finish, function() {
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160 // Cleanup: say this tool is no longer selected
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161 selected_tool = undefined;
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162 });
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163
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164 }, function() {
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165 // Remove the crosshair cursor
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166 googlemap.setOptions({
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167 draggableCursor: undefined
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168 });
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169 });
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170 });
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171 });
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172
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173 // A tool for importing a list of hexes as a selection
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174 $(function() {
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175 add_tool("import", "Import...", function() {
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176 // Make the import form
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177 var import_form = $("<form/>").attr("title",
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178 "Import List As Selection");
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179
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180 import_form.append($("<div/>").text("Input names, one per line:"));
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181
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182 // A big text box
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183 var text_area = $("<textarea/>").addClass("import");
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184 import_form.append(text_area);
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185
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186 import_form.append($("<div/>").text(
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187 "Open a file:"));
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188
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189 // This holds a file form element
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190 var file_picker = $("<input/>").attr("type", "file").addClass("import");
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191
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192 import_form.append(file_picker);
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193
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194 file_picker.change(function(event) {
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195 // When a file is selected, read it in and populate the text box.
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196
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197 // What file do we really want to read?
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198 var file = event.target.files[0];
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199
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200 // Make a FileReader to read the file
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201 var reader = new FileReader();
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202
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203 reader.onload = function(read_event) {
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204 // When we read with readAsText, we get a string. Just stuff it
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205 // in the text box for the user to see.
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206 text_area.text(reader.result);
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207 };
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208
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209 // Read the file, and, when it comes in, stick it in the textbox.
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210 reader.readAsText(file);
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211 });
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212
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213 import_form.dialog({
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214 modal: true,
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215 buttons: {
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216 "Import": function() {
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217 // Do the import of the data. The data in question is always
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218 // in the textbox.
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219
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220 // Select all the entered hexes
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221 select_string(text_area.val());
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222
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223 // Finally, close the dialog
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224 $(this).dialog("close");
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225
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226 // Done with the tool
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227 selected_tool = undefined;
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228 }
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229 },
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230 close: function() {
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231 // They didn't want to use this tool.
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232 selected_tool = undefined;
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233 }
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234 });
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235 });
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236 });
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237
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238 // The actual text to selection import function used by that tool
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239 function select_string(string) {
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240 // Given a string of hex names, one per line, make a selection of all those
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241 // hexes.
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242
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243 // This is an array of signature names entered.
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244 var to_select = [];
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245
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246 // This holds the array of lines. Split on newlines (as seen in
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247 // jQuery.tsv.js)
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248 var lines = string.split(/\r?\n/);
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249
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250 for(var i = 0; i < lines.length; i++) {
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251 // Trim and add to our requested selection
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252 to_select.push(lines[i].trim());
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253 }
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254
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255 // Add a selection with as many of the requested hexes as actually exist and
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256 // pass the current filters.
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257 select_list(to_select);
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258 }
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259
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260 // And a tool for exporting selections as lists of hexes
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261 $(function() {
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262 add_tool("export", "Export...", function() {
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263 // Make the export form
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264 var export_form = $("<form/>").attr("title",
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265 "Export Selection As List");
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266
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267 export_form.append($("<div/>").text("Select a selection to export:"));
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268
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269 // Make a select box for picking from all selections.
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270 var select_box = $("<select/>");
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271
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272 // Populate it with all existing selections
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273 for(var layer_name in layers) {
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274 if(layers[layer_name].selection) {
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275 // This is a selection, so add it to the dropdown.
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276 select_box.append($("<option/>").text(layer_name).attr("value",
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277 layer_name));
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278 }
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279 }
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280
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281 export_form.append(select_box);
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282
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283 export_form.append($("<div/>").text("Exported data:"));
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284
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285 // A big text box
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286 var text_area = $("<textarea/>").addClass("export");
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287 text_area.prop("readonly", true);
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288 export_form.append(text_area);
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289
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290 // Add a download as file link. The "download" attribute makes the
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291 // browser save it, and the href data URI holds the data.
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292 var download_link = $("<a/>").attr("download", "selection.txt");
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293 download_link.attr("href", "data:text/plain;base64,");
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294 download_link.text("Download As Text");
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295
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296 export_form.append(download_link);
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297
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298 text_area.focus(function() {
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299 // Select all on focus.
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300
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301 $(this).select();
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302 });
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303
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304 text_area.mouseup(function(event) {
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305 // Don't change selection on mouseup. See
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306 // http://stackoverflow.com/a/5797700/402891 and
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307 // http://stackoverflow.com/q/3380458/402891
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308 event.preventDefault();
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309 });
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310
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311 select_box.change(function() {
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312 // Update the text area with the list of hexes in the selected
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313 // layer.
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314
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315 // Get the layer name.
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316 var layer_name = select_box.val();
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317 if(!have_layer(layer_name)) {
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318 // Not a real layer.
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319 // Probably just an empty select or something
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320 return;
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321 }
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322
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323 // This holds our list. We build it in a string so we can escape it
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324 // with one .text() call when adding it to the page.
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325 var exported = "";
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326
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327 // Get the layer data to export
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328 var layer_data = layers[layer_name].data;
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329 for(var signature in layer_data) {
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330 if(layer_data[signature]) {
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331 // It's selected, put it in
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332
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333 if(exported != "") {
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334 // If there's already text, put a newline first.
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335 exported += "\n";
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336 }
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337
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338 exported += signature;
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339 }
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340 }
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341
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342 // Now we know all the signatures from the selection, so tell the
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343 // page.
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344 text_area.text(exported);
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345
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346 // Also fill in the data URI for saving. We use the handy
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347 // window.bota encoding function.
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348 download_link.attr("href", "data:text/plain;base64," +
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349 window.btoa(exported));
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350 });
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351
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352 // Trigger the change event on the select box for the first selected
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353 // thing, if any.
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354 select_box.change();
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355
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356 export_form.dialog({
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357 modal: true,
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358 buttons: {
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359 "Done": function() {
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360 // First, close the dialog
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361 $(this).dialog("close");
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362
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363 // Done with the tool
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364 selected_tool = undefined;
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365 }
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366 },
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367 close: function() {
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368 // They didn't want to use this tool.
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369 selected_tool = undefined;
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370 }
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371 });
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372 });
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373 });
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