Mercurial > hg > digilib-old
annotate client/digitallibrary/jquery/jquery.digilib.js @ 629:b426efcc8a8e jquery
questions about display()...
author | robcast |
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date | Tue, 18 Jan 2011 12:51:51 +0100 |
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604 | 1 /* |
2 * digilib jQuery plugin | |
3 * | |
4 */ | |
5 | |
6 (function($) { | |
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7 var actions = { |
610 | 8 reference : { |
9 onclick : "javascript:getRefWin()", | |
10 tooltip : "get a reference URL", | |
11 img : "reference.png" | |
12 }, | |
13 zoomin : { | |
14 onclick : "javascript:dl.zoomBy(1.4)", | |
15 tooltip : "zoom in", | |
16 img : "zoom-in.png" | |
17 }, | |
18 zoomout : { | |
19 onclick : "javascript:zoomBy(0.7)", | |
20 tooltip : "zoom out", | |
21 img : "zoom-out.png" | |
22 }, | |
23 zoomarea : { | |
24 onclick : "javascript:zoomArea()", | |
25 tooltip : "zoom area", | |
26 img : "zoom-area.png" | |
27 }, | |
28 zoomfull : { | |
29 onclick : "javascript:zoomFullpage()", | |
30 tooltip : "view the whole image", | |
31 img : "zoom-full.png" | |
32 }, | |
33 pagewidth : { | |
34 onclick : "javascript:zoomFullpage('width')", | |
35 tooltip : "page width", | |
36 img : "pagewidth.png" | |
37 }, | |
38 back : { | |
623 | 39 onclick : ["gotoPage", "-1"], |
610 | 40 tooltip : "goto previous image", |
41 img : "back.png" | |
42 }, | |
43 fwd : { | |
623 | 44 onclick : ["gotoPage", "+1"], |
610 | 45 tooltip : "goto next image", |
46 img : "fwd.png" | |
47 }, | |
48 page : { | |
49 onclick : "javascript:gotoPageWin()", | |
50 tooltip : "specify image", | |
51 img : "page.png" | |
52 }, | |
53 bird : { | |
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54 onclick : "toggleBirdDiv", |
610 | 55 tooltip : "show bird's eye view", |
56 img : "birds-eye.png" | |
57 }, | |
58 help : { | |
623 | 59 onclick : "toggleAboutDiv", |
610 | 60 tooltip : "about Digilib", |
61 img : "help.png" | |
62 }, | |
63 reset : { | |
64 onclick : "javascript:resetImage()", | |
65 tooltip : "reset image", | |
66 img : "reset.png" | |
67 }, | |
68 mark : { | |
69 onclick : "javascript:setMark()", | |
70 tooltip : "set a mark", | |
71 img : "mark.png" | |
72 }, | |
73 delmark : { | |
74 onclick : "javascript:removeMark()", | |
75 tooltip : "delete the last mark", | |
76 img : "delmark.png" | |
77 }, | |
78 hmir : { | |
79 onclick : "javascript:mirror('h')", | |
80 tooltip : "mirror horizontally", | |
81 img : "mirror-horizontal.png" | |
82 }, | |
83 vmir : { | |
84 onclick : "javascript:mirror('v')", | |
85 tooltip : "mirror vertically", | |
86 img : "mirror-vertical.png" | |
87 }, | |
88 rot : { | |
89 onclick : "javascript:setParamWin('rot', 'Rotate (0..360) clockwise')", | |
90 tooltip : "rotate image", | |
91 img : "rotate.png" | |
92 }, | |
93 brgt : { | |
94 onclick : "javascript:setParamWin('brgt', 'Brightness (-255..255)')", | |
95 tooltip : "set brightness", | |
96 img : "brightness.png" | |
97 }, | |
98 cont : { | |
99 onclick : "javascript:setParamWin('cont', 'Contrast (0..8)')", | |
100 tooltip : "set contrast", | |
101 img : "contrast.png" | |
102 }, | |
103 rgb : { | |
104 onclick : "javascript:setParamWin('rgb', '...')", | |
105 tooltip : "set rgb values", | |
106 img : "rgb.png" | |
107 }, | |
108 quality : { | |
109 onclick : "javascript:setQualityWin('Quality (0..2)')", | |
110 tooltip : "set image quality", | |
111 img : "quality.png" | |
112 }, | |
113 size : { | |
114 onclick : "javascript:toggleSizeMenu()", | |
115 tooltip : "set page size", | |
116 img : "size.png" | |
117 }, | |
118 calibrationx : { | |
119 onclick : "javascript:calibrate('x')", | |
120 tooltip : "calibrate screen x-ratio", | |
121 img : "calibration-x.png" | |
122 }, | |
123 scale : { | |
124 onclick : "javascript:toggleScaleMenu()", | |
125 tooltip : "change image scale", | |
126 img : "original-size.png" | |
127 }, | |
128 options : { | |
129 onclick : "javascript:toggleOptionDiv()", | |
130 tooltip : "hide options", | |
131 img : "options.png" | |
132 }, | |
133 SEP : { | |
134 img : "sep.png" | |
135 } | |
136 }; | |
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137 |
605 | 138 var defaults = { |
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139 // the root digilib element, for easy retrieval |
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140 'digilibRoot' : null, |
616 | 141 // version of this script |
142 'version' : 'jquery.digilib.js 1.0', | |
143 // logo url | |
144 'logoUrl' : '../img/digilib-logo-text1.png', | |
145 // repository url | |
146 'reposUrl' : 'http://digilib.berlios.de', | |
610 | 147 // base URL to Scaler servlet |
148 'scalerBaseUrl' : 'http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler', | |
149 // list of Scaler parameters | |
627 | 150 'scalerParamNames' : ['fn','pn','dw','dh','ww','wh','wx','wy','ws','mo', |
151 'rot','cont','brgt','rgbm','rgba','ddpi','ddpix','ddpiy'], | |
152 // Scaler parameter defaults | |
153 'ww' : 1.0, | |
154 'wh' : 1.0, | |
155 'wx' : 0.0, | |
156 'wy' : 0.0, | |
157 'ws' : 1.0, | |
610 | 158 // mode of operation. |
159 // fullscreen: takes parameters from page URL, keeps state in page URL | |
160 // embedded: takes parameters from Javascript options, keeps state inside object | |
161 'interactionMode' : 'fullscreen', | |
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162 // actions |
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163 'actions' : actions, |
612 | 164 // path to button images (must end with a slash) |
165 'buttonsImagePath' : '../greyskin/', | |
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166 // actions groups |
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167 'actionsStandard' : ["reference","zoomin","zoomout","zoomarea","zoomfull","pagewidth","back","fwd","page","bird","SEP","help","reset","options"], |
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168 'actionsSpecial' : ["mark","delmark","hmir","vmir","rot","brgt","cont","rgb","quality","size","calibrationx","scale","SEP","options"], |
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169 'actionsCustom' : [], |
616 | 170 // is birdView shown? |
171 'isBirdDivVisible' : false, | |
615 | 172 // dimensions of bird's eye window |
173 'birdMaxX' : 200, | |
616 | 174 'birdMaxY' : 200, |
175 // is the "about" window shown? | |
176 'isAboutDivVisible' : false | |
177 | |
610 | 178 }; |
605 | 179 |
608 | 180 // parameters from the query string |
607 | 181 var queryParams = {}; |
608 | 182 |
183 // affine geometry classes | |
184 var geom = dlGeometry(); | |
604 | 185 |
186 var methods = { | |
608 | 187 // digilib initialization |
604 | 188 init : function(options) { |
608 | 189 // settings for this digilib instance are merged from defaults and options |
607 | 190 var settings = $.extend({}, defaults, options); |
191 var isFullscreen = settings.interactionMode === 'fullscreen'; | |
192 if (isFullscreen) { | |
193 queryParams = parseQueryParams(); | |
194 }; | |
604 | 195 return this.each(function() { |
605 | 196 var $elem = $(this); |
197 var data = $elem.data('digilib'); | |
607 | 198 var elemSettings; |
608 | 199 // if the plugin hasn't been initialized yet |
604 | 200 if (!data) { |
605 | 201 // merge query parameters |
607 | 202 if (isFullscreen) { |
203 elemSettings = $.extend({}, settings, queryParams); | |
204 } else { | |
205 elemSettings = $.extend({}, settings, parseImgParams($elem)); | |
206 }; | |
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207 // store $(this) element in the settings |
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208 elemSettings.digilibRoot = $elem; |
627 | 209 data = { |
210 target : $elem, | |
211 settings : elemSettings | |
212 }; | |
605 | 213 // store in data element |
627 | 214 $elem.data('digilib', data); |
604 | 215 } |
608 | 216 // create HTML structure |
627 | 217 setupScalerDiv(data); |
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218 setupButtons(data, 'actionsStandard'); |
627 | 219 // bird's eye view creation - TODO: could be deferred? |
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220 setupBirdviewDiv(data); |
627 | 221 // about window creation - TODO: could be deferred? restrict to only one item? |
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222 setupAboutDiv(data); |
604 | 223 }); |
224 }, | |
608 | 225 |
226 // clean up digilib | |
604 | 227 destroy : function() { |
228 return this.each(function(){ | |
229 var $this = $(this); | |
230 var data = $this.data('digilib'); | |
231 // Namespacing FTW | |
605 | 232 $(window).unbind('.digilib'); // unbinds all digilibs(?) |
604 | 233 data.digilib.remove(); |
234 $this.removeData('digilib'); | |
235 }); | |
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236 }, |
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237 |
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238 // event handler: toggles the visibility of the 'about' window |
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239 toggleAboutDiv : function () { |
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240 var $elem = $(this); // the clicked button |
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241 var settings = $elem.data('digilib').settings; |
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242 var $root = settings.digilibRoot; |
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243 var $about = $root.find('div.about'); |
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244 settings.isAboutDivVisible = !settings.isAboutDivVisible; |
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245 if (settings.isAboutDivVisible) { |
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246 $about.fadeIn(); |
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247 } else { |
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248 $about.fadeOut(); |
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249 }; |
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250 return false; |
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251 }, |
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252 |
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253 // event handler: toggles the visibility of the bird's eye window |
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254 toggleBirdDiv : function () { |
623 | 255 // TODO: red frame functionality |
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256 var $elem = $(this); // the clicked button |
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257 var settings = $elem.data('digilib').settings; |
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258 var $root = settings.digilibRoot; |
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259 var $bird = $root.find('div.birdview'); |
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260 settings.isBirdDivVisible = !settings.isBirdDivVisible; |
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261 if (settings.isBirdDivVisible) { |
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262 $bird.fadeIn(); |
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263 } else { |
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264 $bird.fadeOut(); |
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265 }; |
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266 return false; |
623 | 267 }, |
268 | |
269 // goto given page nr (+/-: relative) | |
270 gotoPage : function(pageNr, keepMarks) { | |
271 var $elem = $(this); // the clicked button | |
272 var settings = $elem.data('digilib').settings; | |
273 var oldpn = settings.pn; | |
624 | 274 var pn = setNumValue(settings, "pn", pageNr); |
275 if (pn == null) return false; // nothing happened | |
623 | 276 if (pn < 1) { |
277 alert("no such page (page number too low)"); | |
278 settings.pn = oldpn; | |
279 return false; | |
280 }; | |
281 if (settings.pt) { | |
282 if (pn > settings.pt) { | |
283 alert("no such page (page number too high)"); | |
284 settings.pn = oldpn; | |
285 return false; | |
286 } | |
287 }; | |
288 // TODO: keepMarks | |
289 var $root = settings.digilibRoot; | |
290 var $img = $root.find('img.pic'); | |
291 display($img, settings); | |
624 | 292 return false; |
604 | 293 } |
605 | 294 }; |
604 | 295 |
623 | 296 // sets a key to a value (relative values with +/- if relative=true) |
297 var setNumValue = function(settings, key, value) { | |
298 // TODO: type and error checking | |
299 if (settings[key] == null) return null; | |
300 var sign = value.substring(0,1); | |
301 if (sign === '+' || sign === '-') { | |
302 settings[key] = parseFloat(settings[key]) + parseFloat(value); | |
303 } else { | |
304 settings[key] = value; | |
305 } | |
306 return settings[key]; | |
307 }; | |
308 | |
608 | 309 // returns parameters from page url |
607 | 310 var parseQueryParams = function() { |
311 return parseQueryString(location.search.slice(1)); | |
312 }; | |
313 | |
608 | 314 // returns parameters taken from embedded img-element |
607 | 315 var parseImgParams = function($elem) { |
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316 var src = $elem.find('img').first().attr('src'); |
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317 if (!src) { |
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318 return null; |
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319 } |
607 | 320 var pos = src.indexOf('?'); |
321 var query = (pos < 0) ? '' : src.substring(pos + 1); | |
322 var scalerUrl = src.substring(0, pos); | |
627 | 323 var params = parseQueryString(query); |
324 params.scalerBaseUrl = scalerUrl; | |
607 | 325 // console.log(hash); |
627 | 326 return params; |
607 | 327 }; |
328 | |
608 | 329 // parses query parameter string into parameter object |
607 | 330 var parseQueryString = function(query) { |
331 var pairs = query.split("&"); | |
627 | 332 var params = {}; |
607 | 333 for (var i = 0; i < pairs.length; i++) { |
334 var pair = pairs[i].split("="); | |
335 if (pair.length === 2) { | |
627 | 336 params[pair[0]] = pair[1]; |
607 | 337 }; |
338 }; | |
627 | 339 return params; |
607 | 340 }; |
604 | 341 |
615 | 342 // returns a query string from key names from a parameter hash |
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343 var getParamString = function (settings, keys) { |
615 | 344 var paramString = ''; |
345 var latter = false; | |
346 for (i = 0; i < keys.length; ++i) { | |
347 var key = keys[i]; | |
348 if (settings[key]) { | |
349 // first param gets no '&' | |
350 paramString += latter ? '&' : ''; | |
351 latter = true; | |
352 // add parm=val | |
353 paramString += key + '=' + settings[key]; | |
354 }; | |
355 } | |
356 return paramString; | |
357 }; | |
358 | |
608 | 359 // returns URL and query string for Scaler |
360 var getScalerString = function (settings) { | |
615 | 361 var keys = settings.scalerParamNames; |
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362 var queryString = getParamString(settings, keys); |
615 | 363 var url = settings.scalerBaseUrl + '?' + queryString; |
609 | 364 return url; |
365 }; | |
615 | 366 |
609 | 367 // returns maximum size for scaler img in fullscreen mode |
368 var getFullscreenImgSize = function($elem) { | |
369 var winH = $(window).height(); | |
370 var winW = $(window).width(); | |
371 // TODO: account for borders? | |
372 return geom.size(winW, winH); | |
608 | 373 }; |
374 | |
622 | 375 // (re)load the img from a new scaler URL |
376 var display = function ($img, settings) { | |
623 | 377 // TODO: update location.href (browser URL) in fullscreen mode |
622 | 378 var scalerUrl = getScalerString(settings); |
379 $img.attr('src', scalerUrl); | |
623 | 380 // TODO: update bird view? |
622 | 381 }; |
382 | |
608 | 383 // creates HTML structure for digilib in elem |
627 | 384 var setupScalerDiv = function (data) { |
385 var settings = data.settings; | |
386 var $elem = data.target; | |
623 | 387 var $img; |
608 | 388 if (settings.interactionMode === 'fullscreen') { |
609 | 389 // fullscreen |
390 var imgSize = getFullscreenImgSize($elem); | |
391 settings.dw = imgSize.width; | |
392 settings.dh = imgSize.height; | |
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393 $img = $('<img/>'); |
629 | 394 display($img, settings); // TODO: is display the right thing here? |
609 | 395 } else { |
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396 // embedded mode -- try to keep img tag |
623 | 397 $img = $elem.find('img'); |
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398 if ($img.length > 0) { |
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399 console.debug("img detach:",$img); |
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400 $img.detach(); |
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401 } else { |
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402 $img = $('<img/>'); |
629 | 403 display($img, settings); // dito |
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404 } |
608 | 405 } |
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406 // create new html |
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407 $elem.empty(); // TODO: should we keep stuff for customization? |
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408 var $scaler = $('<div class="scaler"/>'); |
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409 $elem.append($scaler); |
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410 $scaler.append($img); |
622 | 411 $img.addClass('pic'); |
627 | 412 data.img = $img; |
413 $img.load(scalerImgLoadedFn(data)); | |
608 | 414 }; |
615 | 415 |
610 | 416 // creates HTML structure for buttons in elem |
628
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417 var setupButtons = function (data, actionGroup) { |
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418 var $elem = data.target; |
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419 var settings = data.settings; |
610 | 420 if (settings.interactionMode === 'fullscreen') { |
421 // fullscreen -- create new | |
612 | 422 var $buttonsDiv = $('<div class="buttons"></div>'); |
423 $elem.append($buttonsDiv); | |
618
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424 var actionNames = settings[actionGroup]; |
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425 for (var i = 0; i < actionNames.length; i++) { |
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426 var actionName = actionNames[i]; |
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427 var actionSettings = settings.actions[actionName]; |
612 | 428 // construct the button html |
429 var $button = $('<div class="button"></div>'); | |
430 var $a = $('<a/>'); | |
614 | 431 var $img = $('<img class="button"/>'); |
612 | 432 $buttonsDiv.append($button); |
433 $button.append($a); | |
434 $a.append($img); | |
435 // add attributes and bindings | |
618
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436 $button.attr('title', actionSettings.tooltip); |
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437 $button.addClass('button-' + actionName); |
612 | 438 // let the clicked <a> element know about the digilib context |
618
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439 $a.data('digilib', { 'action' : actionName, 'settings' : settings } ); |
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440 $a.bind('click', function() { |
619 | 441 var $elem = $(this); |
442 // get the context data | |
443 var data = $elem.data('digilib'); | |
612 | 444 // find the action for the clicked element |
618
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445 var method = data.settings.actions[data.action].onclick; |
619 | 446 if ($.isArray(method)) { |
447 $elem.digilib.apply(this, method); | |
448 } else { | |
449 $elem.digilib(method); | |
450 }; | |
618
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451 console.log(method); |
612 | 452 }); |
453 // binding mit closure | |
619 | 454 //(function(){ var action = actionSettings.onclick; |
612 | 455 // $a.bind('click', function(){ console.log( action )} ); |
456 //})(); | |
618
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457 $img.attr('src', settings.buttonsImagePath + actionSettings.img); |
611 | 458 }; |
459 } | |
612 | 460 return $buttonsDiv; |
610 | 461 }; |
615 | 462 |
463 // creates HTML structure for the bird's eye view in elem | |
628
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464 var setupBirdviewDiv = function (data) { |
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465 var $elem = data.target; |
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466 var settings = data.settings; |
615 | 467 // use only the relevant parameters |
468 var keys = ['fn','pn','dw','dh']; | |
469 var birdDimensions = { | |
470 'dw' : settings.birdMaxX, | |
471 'dh' : settings.birdMaxY | |
472 }; | |
473 var birdSettings = $.extend({}, settings, birdDimensions); | |
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474 var birdUrl = settings.scalerBaseUrl + '?' + getParamString(birdSettings, keys); |
615 | 475 // the bird's eye div |
625 | 476 var $birdviewDiv = $('<div class="birdview" style="display:none"/>'); |
615 | 477 // the detail indicator frame |
478 var $birdzoomDiv = $('<div class="birdzoom"/>'); | |
479 // the small image | |
480 var $birdImg = $('<img class="birdimg"/>'); | |
481 $elem.append($birdviewDiv); | |
482 $birdviewDiv.append($birdzoomDiv); | |
483 $birdviewDiv.append($birdImg); | |
484 $birdImg.attr('src', birdUrl); | |
485 }; | |
486 | |
625 | 487 // creates HTML structure for the about view in elem |
628
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488 var setupAboutDiv = function (data) { |
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489 var $elem = data.target; |
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490 var settings = data.settings; |
625 | 491 var $aboutDiv = $('<div class="about" style="display:none"/>'); |
616 | 492 var $header = $('<p>Digilib Graphic Viewer</p>'); |
493 var $link = $('<a/>'); | |
494 var $logo = $('<img class="logo" title="digilib"/>'); | |
495 var $content = $('<p/>'); | |
496 $elem.append($aboutDiv); | |
497 $aboutDiv.append($header); | |
498 $aboutDiv.append($link); | |
499 $aboutDiv.append($content); | |
500 $link.append($logo); | |
501 $logo.attr('src', settings.logoUrl); | |
502 $link.attr('href', settings.reposUrl); | |
503 $content.text('Version: ' + settings.version); | |
619 | 504 // let the element know about the digilib context |
505 $aboutDiv.data('digilib', { 'settings' : settings } ); | |
506 $aboutDiv.bind('click', function() { | |
507 console.log($(this)); | |
508 $(this).digilib('toggleAboutDiv'); | |
509 }); | |
616 | 510 }; |
511 | |
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512 // returns function for load event of scaler img |
627 | 513 var scalerImgLoadedFn = function(data) { |
514 var settings = data.settings; | |
515 var $elem = data.target; | |
516 var $img = data.img; | |
517 | |
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518 return function() { |
627 | 519 console.debug("img loaded! this=", this, " data=", data); |
520 var area = geom.rectangle(settings.wx, settings.wy, settings.ww, settings.wh); | |
521 settings.zoomArea = area; | |
522 // create Transform from current area and picsize | |
523 var picpos = $img.offset(); | |
524 var picrect = geom.rectangle(picpos.left, picpos.top, $img.width(), $img.height()); | |
525 var trafo = geom.transform(); | |
526 // subtract area offset and size | |
527 trafo.concat(trafo.getTranslation(geom.position(area.x, area.y))); | |
528 trafo.concat(trafo.getScale(geom.size(1/area.width, 1/area.height))); | |
529 // scale to screen size | |
530 trafo.concat(trafo.getScale(picrect)); | |
531 trafo.concat(trafo.getTranslation(picrect)); | |
532 data.imgTrafo = trafo; | |
533 // display marks | |
534 //digilib.renderMarks(); | |
535 //digilib.showBirdDiv(isBirdDivVisible); | |
536 //digilib.showArrows(); // show arrow overlays for zoom navigation | |
537 | |
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538 }; |
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539 }; |
605 | 540 // hook plugin into jquery |
541 $.fn.digilib = function(method) { | |
542 if (methods[method]) { | |
543 return methods[method].apply(this, Array.prototype.slice.call(arguments, 1)); | |
544 } else if (typeof(method) === 'object' || !method) { | |
545 return methods.init.apply(this, arguments); | |
546 } else { | |
547 $.error( 'Method ' + method + ' does not exist on jQuery.digilib' ); | |
548 } | |
549 }; | |
604 | 550 |
551 })(jQuery); |