Mercurial > hg > digilib-old
annotate client/digitallibrary/jquery/jquery.digilib.regions.js @ 850:47a6b93bde43 jquery
always show html-defined regions. wrong pos still not fixed
author | hertzhaft |
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date | Mon, 07 Mar 2011 00:38:20 +0100 |
parents | 77248c6d2a5f |
children | 5922c444cd11 |
rev | line source |
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792 | 1 /** optional digilib regions plugin |
2 | |
3 markup a digilib image with rectangular regions | |
4 | |
5 TODO: | |
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6 how to display regions correctly in embedded mode? |
792 | 7 */ |
8 | |
9 (function($) { | |
813 | 10 // the digilib object |
11 var digilib; | |
792 | 12 // the data object passed by digilib |
13 var data; | |
813 | 14 // the functions made available by digilib |
792 | 15 var fn; |
813 | 16 // affine geometry plugin |
792 | 17 var geom; |
18 | |
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19 var FULL_AREA; |
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20 |
813 | 21 var ID_PREFIX = "digilib-region-"; |
22 | |
792 | 23 var buttons = { |
24 addregion : { | |
813 | 25 onclick : "defineRegion", |
26 tooltip : "define a region", | |
792 | 27 icon : "addregion.png" |
28 }, | |
29 delregion : { | |
30 onclick : "removeRegion", | |
31 tooltip : "delete the last region", | |
32 icon : "delregion.png" | |
33 }, | |
34 regions : { | |
35 onclick : "toggleRegions", | |
36 tooltip : "show or hide regions", | |
37 icon : "regions.png" | |
38 }, | |
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39 regionhtml : { |
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40 onclick : "showRegionHTML", |
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41 tooltip : "show information about regions", |
792 | 42 icon : "regioninfo.png" |
43 } | |
44 }; | |
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45 |
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46 var defaults = { |
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47 // are regions shown? |
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48 'isRegionVisible' : true, |
813 | 49 // are region numbers shown? |
50 'showRegionNumbers' : false, | |
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51 // is window with region HTML shown? |
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52 'showRegionHTML' : false, |
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53 // is there region content in the page? |
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54 'hasRegionContent' : false, |
823 | 55 // turn any region into a clickable link to its detail view |
56 'autoRegionLinks' : false, | |
57 // class name for content divs (must additionally be marked with class "keep") | |
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58 'regionContentSelector' : 'div.regioncontent', |
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59 // buttonset of this plugin |
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60 'regionSet' : ['regions', 'addregion', 'delregion', 'regionhtml', 'lessoptions'], |
813 | 61 // url param for regions |
62 'rg' : null, | |
63 }; | |
792 | 64 |
65 var actions = { | |
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66 |
792 | 67 // define a region interactively with two clicked points |
813 | 68 "defineRegion" : function(data) { |
69 if (!data.settings.isRegionVisible) { | |
70 alert("Please turn on regions visibility!"); | |
71 return; | |
72 } | |
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73 var $elem = data.$elem; |
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74 var $body = $('body'); |
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75 var bodyRect = geom.rectangle($body); |
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76 var $scaler = data.$scaler; |
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77 var scalerRect = geom.rectangle($scaler); |
792 | 78 var pt1, pt2; |
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79 // overlay prevents other elements from reacting to mouse events |
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80 var $overlay = $('<div class="digilib-overlay"/>'); |
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81 $body.append($overlay); |
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82 bodyRect.adjustDiv($overlay); |
823 | 83 var $regionDiv = addRegionDiv(data, data.regions.length); |
792 | 84 |
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85 // mousedown handler: start sizing |
792 | 86 var regionStart = function (evt) { |
87 pt1 = geom.position(evt); | |
88 // setup and show zoom div | |
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89 pt1.adjustDiv($regionDiv); |
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90 $regionDiv.width(0).height(0); |
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91 $regionDiv.show(); |
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92 // register mouse events |
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93 $overlay.bind("mousemove.dlRegion", regionMove); |
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94 $overlay.bind("mouseup.dlRegion", regionEnd); |
792 | 95 return false; |
96 }; | |
97 | |
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98 // mousemove handler: size region |
792 | 99 var regionMove = function (evt) { |
100 pt2 = geom.position(evt); | |
101 var rect = geom.rectangle(pt1, pt2); | |
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102 rect.clipTo(scalerRect); |
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103 // update region |
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104 rect.adjustDiv($regionDiv); |
792 | 105 return false; |
106 }; | |
107 | |
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108 // mouseup handler: end sizing |
792 | 109 var regionEnd = function (evt) { |
110 pt2 = geom.position(evt); | |
111 // assume a click and continue if the area is too small | |
112 var clickRect = geom.rectangle(pt1, pt2); | |
113 if (clickRect.getArea() <= 5) return false; | |
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114 // unregister mouse events and get rid of overlay |
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115 $overlay.unbind("mousemove.dlRegion", regionMove); |
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116 $overlay.unbind("mouseup.dlRegion", regionEnd); |
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117 $overlay.remove(); |
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118 // clip region |
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119 clickRect.clipTo(scalerRect); |
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120 clickRect.adjustDiv($regionDiv); |
813 | 121 storeRegion(data, $regionDiv); |
792 | 122 // fn.redisplay(data); |
813 | 123 fn.highlightButtons(data, 'addregion', 0); |
124 redisplay(data); | |
792 | 125 return false; |
126 }; | |
127 | |
128 // bind start zoom handler | |
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129 $overlay.one('mousedown.dlRegion', regionStart); |
813 | 130 fn.highlightButtons(data, 'addregion', 1); |
792 | 131 }, |
132 | |
133 // remove the last added region | |
134 "removeRegion" : function (data) { | |
813 | 135 if (!data.settings.isRegionVisible) { |
136 alert("Please turn on regions visibility!"); | |
137 return; | |
138 } | |
139 var region = data.regions.pop(); | |
140 if (region == null) return; | |
141 var $regionDiv = region.$div; | |
792 | 142 $regionDiv.remove(); |
813 | 143 redisplay(data); |
792 | 144 }, |
145 | |
813 | 146 // show/hide regions |
147 "toggleRegions" : function (data) { | |
148 var show = !data.settings.isRegionVisible; | |
149 data.settings.isRegionVisible = show; | |
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150 fn.highlightButtons(data, 'regions', show); |
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151 renderRegions(data, 1); |
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152 }, |
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153 |
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154 // show/hide region HTML code |
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155 "showRegionHTML" : function (data) { |
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156 var show = !data.settings.showRegionHTML; |
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157 data.settings.showRegionHTML = show; |
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158 fn.highlightButtons(data, 'regionhtml', show); |
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159 var $html = data.$htmlDiv; |
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160 if (!show) { |
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161 $html.fadeOut(function () { |
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162 $html.contents().remove(); |
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163 }); |
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164 return; |
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165 } |
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166 // empty the div for HTML display |
835 | 167 $html.append($('<div/>').text('<div class="keep regioncontent">')); |
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168 $.each(data.regions, function(index, region) { |
835 | 169 var area = "area:" |
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170 + region.x + "/" + region.y + "/" |
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171 + region.width + "/" + region.height; |
835 | 172 $html.append($('<div/>').text('<a href="" rel="' + area + '">')); |
173 $html.append($('<div/>').text('</a>')); | |
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174 }); |
835 | 175 $html.append($('<div/>').text('</div>')); |
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176 $html.fadeIn(); |
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177 }, |
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178 |
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179 "redraw" : function (data) { |
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180 renderRegions(data); |
792 | 181 } |
182 }; | |
183 | |
813 | 184 // store a region div |
185 var storeRegion = function (data, $regionDiv) { | |
186 var regions = data.regions; | |
187 var rect = geom.rectangle($regionDiv); | |
188 var regionRect = data.imgTrafo.invtransform(rect); | |
189 regionRect.$div = $regionDiv; | |
190 regions.push(regionRect); | |
191 console.debug("regions", data.regions, "regionRect", regionRect); | |
192 }; | |
193 | |
194 // add a region to data.$elem | |
823 | 195 var addRegionDiv = function (data, index) { |
196 var nr = index + 1; // we count regions from 1 | |
197 // create a digilib URL for this detail | |
198 var regionUrl = getRegionUrl(data, index); | |
813 | 199 var $regionDiv = $('<div class="region overlay" style="display:none"/>'); |
200 $regionDiv.attr("id", ID_PREFIX + nr); | |
201 data.$elem.append($regionDiv); | |
202 if (data.settings.showRegionNumbers) { | |
823 | 203 var $regionNr = $('<div class="regionnumber"/>'); |
204 var $regionLink = $('<a/>'); | |
205 $regionLink.attr('href', regionUrl); | |
206 $regionLink.text(nr); | |
207 $regionNr.append($regionLink); | |
813 | 208 $regionDiv.append($regionNr); |
209 } | |
823 | 210 if (data.settings.autoRegionLinks) { |
211 $regionDiv.bind('click.dlRegion', function() { | |
212 window.location = regionUrl; | |
213 }) | |
214 } | |
813 | 215 return $regionDiv; |
216 }; | |
217 | |
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218 // add region content |
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219 var addRegionContent = function (region, $elem) { |
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220 var $regionDiv = region.$div; |
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221 $regionDiv.append($elem); |
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222 } |
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223 |
813 | 224 // create a region div from the data.regions collection |
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225 var createRegionDiv = function (regions, index) { |
813 | 226 var region = regions[index]; |
823 | 227 var $regionDiv = addRegionDiv(data, index); |
813 | 228 region.$div = $regionDiv; |
229 return $regionDiv; | |
230 }; | |
231 | |
232 // create regions | |
233 var createRegionDivs = function (data) { | |
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234 var regions = data.regions; |
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235 $.each(regions, function(i) { |
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236 createRegionDiv(regions, i); |
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237 }); |
792 | 238 }; |
239 | |
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240 // create regions from HTML |
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241 var createRegionsFromHTML = function (data) { |
823 | 242 var regions = data.regions; |
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243 var selector = data.settings.regionContentSelector; |
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244 // regions are defined in "a" tags |
835 | 245 var $content = data.$elem.contents(selector).contents('a'); |
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246 console.debug("createRegionsFromHTML", $content); |
835 | 247 $content.each(function(index, a) { |
248 var $a = $(a); | |
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249 // the "rel" attribute has area coords |
835 | 250 var rel = $a.attr('rel'); |
251 var area = rel.replace(/^area:/i, ''); | |
252 var pos = area.split("/", 4); | |
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253 var rect = geom.rectangle(pos[0], pos[1], pos[2], pos[3]); |
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254 regions.push(rect); |
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255 var $regionDiv = createRegionDiv(regions, index); |
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256 var href = $a.attr('href'); |
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257 var text = $a.text(); |
835 | 258 $regionDiv.append($a.clone()); |
259 // $a.show(); | |
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260 }); |
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261 }; |
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262 |
813 | 263 // show a region on top of the scaler image |
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264 var renderRegion = function (data, index, anim) { |
813 | 265 if (!data.imgTrafo) return; |
266 var $elem = data.$elem; | |
792 | 267 var regions = data.regions; |
813 | 268 if (index > regions.length) return; |
269 var region = regions[index] | |
270 var $regionDiv = region.$div; | |
271 if (!$regionDiv) { | |
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272 console.debug("renderRegion: region has no $div", region); |
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273 // alert("renderRegion: region has no $div to show"); |
813 | 274 return; |
275 } | |
276 var regionRect = region.copy(); | |
277 var show = data.settings.isRegionVisible; | |
278 if (show && data.zoomArea.overlapsRect(regionRect)) { | |
279 regionRect.clipTo(data.zoomArea); | |
280 var screenRect = data.imgTrafo.transform(regionRect); | |
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281 // console.debug('renderRegion:', screenRect, regionRect, "imgTrafo=", data.imgTrafo); |
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282 console.debug("renderRegion: mpos=",geom.position(screenRect)); |
813 | 283 screenRect.adjustDiv($regionDiv); |
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284 if (anim) { |
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285 $regionDiv.fadeIn(); |
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286 } else{ |
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287 $regionDiv.show(); |
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288 } |
813 | 289 } else { |
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290 if (anim) { |
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291 $regionDiv.fadeOut(); |
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292 } else{ |
824 | 293 $regionDiv.hide(); |
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294 } |
813 | 295 } |
296 }; | |
297 | |
298 // show regions | |
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299 var renderRegions = function (data, anim) { |
813 | 300 for (var i = 0; i < data.regions.length ; i++) { |
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301 renderRegion(data, i, anim); |
813 | 302 } |
303 }; | |
304 | |
305 var unpackRegions = function (data) { | |
306 // create regions from parameters | |
307 var rg = data.settings.rg; | |
308 if (rg == null) return; | |
309 var regions = data.regions; | |
310 var rs = rg.split(","); | |
311 for (var i = 0; i < rs.length; i++) { | |
312 var r = rs[i]; | |
313 var pos = r.split("/", 4); | |
314 var rect = geom.rectangle(pos[0], pos[1], pos[2], pos[3]); | |
315 regions.push(rect); | |
792 | 316 } |
317 }; | |
318 | |
813 | 319 // pack regions array into a parameter string |
320 var packRegions = function (data) { | |
321 var regions = data.regions; | |
815 | 322 if (!regions.length) { |
323 data.settings.rg = null; | |
324 return; | |
325 } | |
813 | 326 var rg = ''; |
327 for (var i = 0; i < regions.length; i++) { | |
328 region = regions[i]; | |
329 if (i) { | |
330 rg += ','; | |
792 | 331 } |
813 | 332 rg += [ |
333 fn.cropFloatStr(region.x), | |
334 fn.cropFloatStr(region.y), | |
335 fn.cropFloatStr(region.width), | |
336 fn.cropFloatStr(region.height) | |
337 ].join('/'); | |
338 } | |
339 data.settings.rg = rg; | |
792 | 340 }; |
341 | |
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342 // reload display after a region has been added or removed |
813 | 343 var redisplay = function (data) { |
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344 if (!data.settings.hasRegionContent) { |
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345 packRegions(data); |
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346 } |
813 | 347 fn.redisplay(data); |
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348 }; |
813 | 349 |
823 | 350 // for turning region numbers/region divs into links to zoomed details |
351 var getRegionUrl = function (data, index) { | |
352 var region = data.regions[index]; | |
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353 var settings = data.settings; |
823 | 354 var params = { |
355 "fn" : settings.fn, | |
356 "pn" : settings.pn | |
357 }; | |
358 fn.packArea(params, region); | |
359 fn.packMarks(params, data.marks); | |
360 fn.packScalerFlags(params, data.scalerFlags); | |
361 var paramNames = digilib.defaults.digilibParamNames; | |
362 // build our own digilib URL without storing anything | |
363 var queryString = fn.getParamString(params, paramNames, digilib.defaults); | |
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364 return settings.digilibBaseUrl + '?' + queryString; |
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365 }; |
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366 |
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367 // event handler, reads region parameter and creates region divs |
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368 var handleSetup = function (evt) { |
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369 data = this; |
813 | 370 console.debug("regions: handleSetup", data.settings.rg); |
823 | 371 // regions with content are given in HTML divs |
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372 if (data.settings.hasRegionContent) { |
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373 createRegionsFromHTML(data); |
823 | 374 // regions are defined in the URL |
818
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375 } else { |
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376 unpackRegions(data); |
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377 createRegionDivs(data); |
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378 fn.highlightButtons(data, 'regionhtml', data.settings.showRegionHTML); |
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379 } |
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380 }; |
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381 |
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382 // event handler, sets buttons and shows regions |
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383 var handleUpdate = function (evt) { |
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384 data = this; |
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385 console.debug("regions: handleUpdate"); |
848 | 386 var settings = data.settings; |
387 fn.highlightButtons(data, 'regions' , settings.isRegionVisible); | |
388 fn.highlightButtons(data, 'regionhtml' , settings.showRegionHTML); | |
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389 renderRegions(data); |
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390 }; |
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391 |
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392 // event handler, redisplays regions (e.g. in a new position) |
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393 var handleRedisplay = function (evt) { |
813 | 394 data = this; |
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395 console.debug("regions: handleRedisplay"); |
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396 renderRegions(data); |
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397 }; |
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398 |
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399 // event handler |
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400 var handleDragZoom = function (evt, zoomArea) { |
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401 // console.debug("regions: handleDragZoom, zoomArea:", zoomArea); |
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402 // data = this; |
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403 }; |
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404 |
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405 // plugin installation called by digilib on plugin object. |
813 | 406 var install = function(plugin) { |
407 digilib = plugin; | |
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408 console.debug('installing regions plugin. digilib:', digilib); |
813 | 409 fn = digilib.fn; |
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410 // import geometry classes |
813 | 411 geom = fn.geometry; |
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412 FULL_AREA = geom.rectangle(0,0,1,1); |
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413 // add defaults, actions, buttons |
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414 $.extend(digilib.defaults, defaults); |
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415 $.extend(digilib.actions, actions); |
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416 $.extend(digilib.buttons, buttons); |
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417 }; |
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418 |
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419 // plugin initialization |
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420 var init = function (data) { |
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421 console.debug('initialising regions plugin. data:', data); |
835 | 422 var $elem = data.$elem; |
823 | 423 // regions array |
424 data.regions = []; | |
835 | 425 // regions div |
426 var $html = $('<div class="keep regionHTML"/>'); | |
427 $elem.append($html); | |
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428 data.$htmlDiv = $html; |
848 | 429 // install event handler |
430 var $data = $(data); | |
431 $data.bind('setup', handleSetup); | |
432 $data.bind('update', handleUpdate); | |
433 $data.bind('redisplay', handleRedisplay); | |
434 $data.bind('dragZoom', handleDragZoom); | |
435 var settings = data.settings; | |
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436 var selector = data.settings.regionContentSelector; |
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437 settings.hasRegionContent = $elem.has(selector).length > 0; |
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438 // neither URL-defined regions nor buttons when regions are predefined in HTML |
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439 if (!settings.hasRegionContent) { |
848 | 440 var mode = settings.interactionMode; |
823 | 441 // add "rg" to digilibParamNames |
848 | 442 settings.digilibParamNames.push('rg'); |
823 | 443 // additional buttons |
848 | 444 var buttonSettings = settings.buttonSettings[mode]; |
823 | 445 // configure buttons through digilib "regionSet" option |
848 | 446 var buttonSet = settings.regionSet || regionSet; |
823 | 447 // set regionSet to [] or '' for no buttons (when showing regions only) |
448 if (buttonSet.length && buttonSet.length > 0) { | |
449 buttonSettings['regionSet'] = buttonSet; | |
450 buttonSettings.buttonSets.push('regionSet'); | |
451 } | |
813 | 452 } |
792 | 453 }; |
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454 |
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455 // plugin object with name and install/init methods |
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456 // shared objects filled by digilib on registration |
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457 var pluginProperties = { |
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458 name : 'region', |
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459 install : install, |
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460 init : init, |
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461 buttons : {}, |
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462 actions : {}, |
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463 fn : {}, |
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464 plugins : {} |
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465 }; |
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466 |
792 | 467 if ($.fn.digilib == null) { |
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468 $.error("jquery.digilib.regions must be loaded after jquery.digilib!"); |
792 | 469 } else { |
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470 $.fn.digilib('plugin', pluginProperties); |
792 | 471 } |
472 })(jQuery); |