Mercurial > hg > digilib-old
annotate client/digitallibrary/jquery/jquery.digilib.js @ 645:91d168f7dd0d jquery
small improvement
author | robcast |
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date | Wed, 19 Jan 2011 20:41:25 +0100 |
parents | ee8ccd84c5f8 |
children | 83cc0c96612d 2e817524992e |
rev | line source |
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604 | 1 /* |
2 * digilib jQuery plugin | |
3 * | |
4 */ | |
636 | 5 |
6 // fallback for console.log calls | |
7 if (typeof(console) === 'undefined') { | |
8 var console = { | |
9 log : function(){}, | |
10 debug : function(){}, | |
11 error : function(){} | |
12 }; | |
13 } | |
604 | 14 |
15 (function($) { | |
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16 var actions = { |
610 | 17 reference : { |
18 onclick : "javascript:getRefWin()", | |
19 tooltip : "get a reference URL", | |
20 img : "reference.png" | |
21 }, | |
22 zoomin : { | |
643 | 23 onclick : ["zoomBy", 1.4], |
610 | 24 tooltip : "zoom in", |
25 img : "zoom-in.png" | |
26 }, | |
27 zoomout : { | |
643 | 28 onclick : ["zoomBy", 0.7], |
610 | 29 tooltip : "zoom out", |
30 img : "zoom-out.png" | |
31 }, | |
32 zoomarea : { | |
33 onclick : "javascript:zoomArea()", | |
34 tooltip : "zoom area", | |
35 img : "zoom-area.png" | |
36 }, | |
37 zoomfull : { | |
38 onclick : "javascript:zoomFullpage()", | |
39 tooltip : "view the whole image", | |
40 img : "zoom-full.png" | |
41 }, | |
42 pagewidth : { | |
43 onclick : "javascript:zoomFullpage('width')", | |
44 tooltip : "page width", | |
45 img : "pagewidth.png" | |
46 }, | |
47 back : { | |
623 | 48 onclick : ["gotoPage", "-1"], |
610 | 49 tooltip : "goto previous image", |
50 img : "back.png" | |
51 }, | |
52 fwd : { | |
623 | 53 onclick : ["gotoPage", "+1"], |
610 | 54 tooltip : "goto next image", |
55 img : "fwd.png" | |
56 }, | |
57 page : { | |
58 onclick : "javascript:gotoPageWin()", | |
59 tooltip : "specify image", | |
60 img : "page.png" | |
61 }, | |
62 bird : { | |
635 | 63 onclick : "showBirdDiv", |
610 | 64 tooltip : "show bird's eye view", |
65 img : "birds-eye.png" | |
66 }, | |
67 help : { | |
635 | 68 onclick : "showAboutDiv", |
610 | 69 tooltip : "about Digilib", |
70 img : "help.png" | |
71 }, | |
72 reset : { | |
73 onclick : "javascript:resetImage()", | |
74 tooltip : "reset image", | |
75 img : "reset.png" | |
76 }, | |
77 mark : { | |
78 onclick : "javascript:setMark()", | |
79 tooltip : "set a mark", | |
80 img : "mark.png" | |
81 }, | |
82 delmark : { | |
83 onclick : "javascript:removeMark()", | |
84 tooltip : "delete the last mark", | |
85 img : "delmark.png" | |
86 }, | |
87 hmir : { | |
88 onclick : "javascript:mirror('h')", | |
89 tooltip : "mirror horizontally", | |
90 img : "mirror-horizontal.png" | |
91 }, | |
92 vmir : { | |
93 onclick : "javascript:mirror('v')", | |
94 tooltip : "mirror vertically", | |
95 img : "mirror-vertical.png" | |
96 }, | |
97 rot : { | |
98 onclick : "javascript:setParamWin('rot', 'Rotate (0..360) clockwise')", | |
99 tooltip : "rotate image", | |
100 img : "rotate.png" | |
101 }, | |
102 brgt : { | |
103 onclick : "javascript:setParamWin('brgt', 'Brightness (-255..255)')", | |
104 tooltip : "set brightness", | |
105 img : "brightness.png" | |
106 }, | |
107 cont : { | |
108 onclick : "javascript:setParamWin('cont', 'Contrast (0..8)')", | |
109 tooltip : "set contrast", | |
110 img : "contrast.png" | |
111 }, | |
112 rgb : { | |
113 onclick : "javascript:setParamWin('rgb', '...')", | |
114 tooltip : "set rgb values", | |
115 img : "rgb.png" | |
116 }, | |
117 quality : { | |
118 onclick : "javascript:setQualityWin('Quality (0..2)')", | |
119 tooltip : "set image quality", | |
120 img : "quality.png" | |
121 }, | |
122 size : { | |
123 onclick : "javascript:toggleSizeMenu()", | |
124 tooltip : "set page size", | |
125 img : "size.png" | |
126 }, | |
127 calibrationx : { | |
128 onclick : "javascript:calibrate('x')", | |
129 tooltip : "calibrate screen x-ratio", | |
130 img : "calibration-x.png" | |
131 }, | |
132 scale : { | |
133 onclick : "javascript:toggleScaleMenu()", | |
134 tooltip : "change image scale", | |
135 img : "original-size.png" | |
136 }, | |
137 options : { | |
138 onclick : "javascript:toggleOptionDiv()", | |
139 tooltip : "hide options", | |
140 img : "options.png" | |
141 }, | |
142 SEP : { | |
143 img : "sep.png" | |
144 } | |
145 }; | |
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146 |
605 | 147 var defaults = { |
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148 // the root digilib element, for easy retrieval |
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149 'digilibRoot' : null, |
616 | 150 // version of this script |
635 | 151 'version' : 'jquery.digilib.js 0.9', |
616 | 152 // logo url |
153 'logoUrl' : '../img/digilib-logo-text1.png', | |
635 | 154 // homepage url (behind logo) |
155 'homeUrl' : 'http://digilib.berlios.de', | |
610 | 156 // base URL to Scaler servlet |
157 'scalerBaseUrl' : 'http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler', | |
158 // list of Scaler parameters | |
627 | 159 'scalerParamNames' : ['fn','pn','dw','dh','ww','wh','wx','wy','ws','mo', |
160 'rot','cont','brgt','rgbm','rgba','ddpi','ddpix','ddpiy'], | |
161 // Scaler parameter defaults | |
643 | 162 'pn' : 1, |
627 | 163 'ww' : 1.0, |
164 'wh' : 1.0, | |
165 'wx' : 0.0, | |
166 'wy' : 0.0, | |
167 'ws' : 1.0, | |
643 | 168 'mo' : '', |
169 'rot' : 0, | |
170 'cont' : 0, | |
171 'brgt' : 0, | |
172 'rgbm' : '0/0/0', | |
173 'rgba' : '0/0/0', | |
174 'ddpi' : null, | |
175 'ddpix' : null, | |
176 'ddpiy' : null, | |
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177 // list of digilib parameters |
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178 'digilibParamNames' : ['fn','pn','ww','wh','wx','wy','ws','mo','rot','cont','brgt','rgbm','rgba', |
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179 'mk'], |
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180 // digilib parameter defaults |
643 | 181 'mk' : '', |
182 // mode of operation: | |
183 // fullscreen = take parameters from page URL, keep state in page URL | |
184 // embedded = take parameters from Javascript options, keep state inside object | |
610 | 185 'interactionMode' : 'fullscreen', |
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186 // actions |
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187 'actions' : actions, |
612 | 188 // path to button images (must end with a slash) |
189 'buttonsImagePath' : '../greyskin/', | |
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190 // actions groups |
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191 'actionsStandard' : ["reference","zoomin","zoomout","zoomarea","zoomfull","pagewidth","back","fwd","page","bird","SEP","help","reset","options"], |
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192 'actionsSpecial' : ["mark","delmark","hmir","vmir","rot","brgt","cont","rgb","quality","size","calibrationx","scale","SEP","options"], |
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193 'actionsCustom' : [], |
616 | 194 // is birdView shown? |
195 'isBirdDivVisible' : false, | |
615 | 196 // dimensions of bird's eye window |
639 | 197 'birdDivOptions' : {'dw' : 200, 'dh' : 200}, |
616 | 198 // is the "about" window shown? |
199 'isAboutDivVisible' : false | |
200 | |
610 | 201 }; |
605 | 202 |
608 | 203 // affine geometry classes |
204 var geom = dlGeometry(); | |
604 | 205 |
643 | 206 var MAX_ZOOMAREA = geom.rectangle(0, 0, 1, 1); |
207 | |
604 | 208 var methods = { |
608 | 209 // digilib initialization |
604 | 210 init : function(options) { |
608 | 211 // settings for this digilib instance are merged from defaults and options |
607 | 212 var settings = $.extend({}, defaults, options); |
636 | 213 var isFullscreen = settings.interactionMode === 'fullscreen'; |
214 var queryParams = {}; | |
607 | 215 if (isFullscreen) { |
216 queryParams = parseQueryParams(); | |
636 | 217 } |
604 | 218 return this.each(function() { |
605 | 219 var $elem = $(this); |
220 var data = $elem.data('digilib'); | |
607 | 221 var elemSettings; |
608 | 222 // if the plugin hasn't been initialized yet |
604 | 223 if (!data) { |
605 | 224 // merge query parameters |
607 | 225 if (isFullscreen) { |
226 elemSettings = $.extend({}, settings, queryParams); | |
227 } else { | |
228 elemSettings = $.extend({}, settings, parseImgParams($elem)); | |
634 | 229 } |
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230 // store $(this) element in the settings |
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231 elemSettings.digilibRoot = $elem; |
627 | 232 data = { |
233 target : $elem, | |
636 | 234 settings : elemSettings, |
235 queryParams : queryParams | |
627 | 236 }; |
605 | 237 // store in data element |
627 | 238 $elem.data('digilib', data); |
604 | 239 } |
633 | 240 unpackParams(data); |
608 | 241 // create HTML structure |
627 | 242 setupScalerDiv(data); |
628
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243 setupButtons(data, 'actionsStandard'); |
639 | 244 // bird's eye view creation |
245 if (settings.isBirdDivVisible) { | |
641 | 246 setupBirdDiv(data); |
639 | 247 } |
627 | 248 // about window creation - TODO: could be deferred? restrict to only one item? |
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249 setupAboutDiv(data); |
604 | 250 }); |
251 }, | |
608 | 252 |
253 // clean up digilib | |
604 | 254 destroy : function() { |
255 return this.each(function(){ | |
636 | 256 var $elem = $(this); |
257 var data = $elem.data('digilib'); | |
604 | 258 // Namespacing FTW |
605 | 259 $(window).unbind('.digilib'); // unbinds all digilibs(?) |
604 | 260 data.digilib.remove(); |
636 | 261 $elem.removeData('digilib'); |
604 | 262 }); |
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263 }, |
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264 |
635 | 265 // show or hide the 'about' window |
266 showAboutDiv : function(show) { | |
636 | 267 var $elem = $(this); |
268 var data = $elem.data('digilib'); | |
635 | 269 data.settings.isAboutDivVisible = showDiv(data.settings.isAboutDivVisible, data.$aboutDiv, show); |
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270 }, |
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271 |
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272 // event handler: toggles the visibility of the bird's eye window |
635 | 273 showBirdDiv : function (show) { |
636 | 274 var $elem = $(this); |
275 var data = $elem.data('digilib'); | |
638 | 276 if (data.$birdDiv == null) { |
277 // no bird div -> create | |
278 setupBirdDiv(data); | |
279 } | |
635 | 280 data.settings.isBirdDivVisible = showDiv(data.settings.isBirdDivVisible, data.$birdDiv, show); |
623 | 281 }, |
282 | |
283 // goto given page nr (+/-: relative) | |
636 | 284 gotoPage : function (pageNr) { |
643 | 285 var $elem = $(this); |
636 | 286 var data = $elem.data('digilib'); |
287 var settings = data.settings; | |
623 | 288 var oldpn = settings.pn; |
624 | 289 var pn = setNumValue(settings, "pn", pageNr); |
290 if (pn == null) return false; // nothing happened | |
623 | 291 if (pn < 1) { |
292 alert("no such page (page number too low)"); | |
293 settings.pn = oldpn; | |
294 return false; | |
634 | 295 } |
623 | 296 if (settings.pt) { |
297 if (pn > settings.pt) { | |
298 alert("no such page (page number too high)"); | |
299 settings.pn = oldpn; | |
300 return false; | |
301 } | |
634 | 302 } |
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303 // reset mk and others(?) |
643 | 304 data.marks = []; |
305 data.zoomArea = MAX_ZOOMAREA; | |
636 | 306 // then reload |
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307 redisplay(data); |
643 | 308 }, |
309 | |
310 // zoom by a given factor | |
311 zoomBy : function (factor) { | |
312 var $elem = $(this); | |
313 var data = $elem.data('digilib'); | |
314 zoomBy(data, factor); | |
604 | 315 } |
605 | 316 }; |
604 | 317 |
623 | 318 // sets a key to a value (relative values with +/- if relative=true) |
319 var setNumValue = function(settings, key, value) { | |
641 | 320 if (isNumber(value)) return settings[key] = value; |
623 | 321 var sign = value.substring(0,1); |
322 if (sign === '+' || sign === '-') { | |
637 | 323 if (settings[key] == null) { |
324 // this doesn't make much sense but still... | |
325 settings[key] = 0; | |
326 } | |
327 settings[key] = parseFloat(settings[key]) + parseFloat(value); | |
623 | 328 } else { |
329 settings[key] = value; | |
637 | 330 } |
623 | 331 return settings[key]; |
637 | 332 }; |
623 | 333 |
608 | 334 // returns parameters from page url |
607 | 335 var parseQueryParams = function() { |
636 | 336 return parseQueryString(window.location.search.slice(1)); |
337 }; | |
607 | 338 |
636 | 339 // returns parameters from embedded img-element |
607 | 340 var parseImgParams = function($elem) { |
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341 var src = $elem.find('img').first().attr('src'); |
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342 if (!src) { |
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343 return null; |
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344 } |
607 | 345 var pos = src.indexOf('?'); |
346 var query = (pos < 0) ? '' : src.substring(pos + 1); | |
347 var scalerUrl = src.substring(0, pos); | |
627 | 348 var params = parseQueryString(query); |
349 params.scalerBaseUrl = scalerUrl; | |
350 return params; | |
636 | 351 }; |
607 | 352 |
608 | 353 // parses query parameter string into parameter object |
607 | 354 var parseQueryString = function(query) { |
355 var pairs = query.split("&"); | |
627 | 356 var params = {}; |
636 | 357 //var keys = []; |
607 | 358 for (var i = 0; i < pairs.length; i++) { |
359 var pair = pairs[i].split("="); | |
360 if (pair.length === 2) { | |
627 | 361 params[pair[0]] = pair[1]; |
636 | 362 //keys.push(pair[0]); |
634 | 363 } |
636 | 364 } |
627 | 365 return params; |
636 | 366 }; |
604 | 367 |
643 | 368 // returns a query string from key names from a parameter hash (ignoring if the same value is in defaults) |
369 var getParamString = function (settings, keys, defaults) { | |
615 | 370 var paramString = ''; |
371 var latter = false; | |
372 for (i = 0; i < keys.length; ++i) { | |
373 var key = keys[i]; | |
643 | 374 if ((settings[key] != null) && ((defaults == null) || (settings[key] !== defaults[key]))) { |
615 | 375 // first param gets no '&' |
376 paramString += latter ? '&' : ''; | |
377 latter = true; | |
378 // add parm=val | |
379 paramString += key + '=' + settings[key]; | |
643 | 380 } |
615 | 381 } |
382 return paramString; | |
631 | 383 }; |
384 | |
636 | 385 // returns URL and query string for Scaler |
386 var getScalerUrl = function (data) { | |
387 var settings = data.settings; | |
388 var keys = settings.scalerParamNames; | |
643 | 389 var queryString = getParamString(settings, keys, defaults); |
636 | 390 var url = settings.scalerBaseUrl + '?' + queryString; |
391 return url; | |
392 }; | |
393 | |
394 // returns URL and query string for current digilib | |
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395 var getDigilibUrl = function (data) { |
643 | 396 packParams(data); |
636 | 397 var settings = data.settings; |
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398 var queryString = getParamString(settings, settings.digilibParamNames, defaults); |
636 | 399 var url = window.location.toString(); |
400 var pos = url.indexOf('?'); | |
401 var baseUrl = url.substring(0, pos); | |
402 var newurl = baseUrl + '?' + queryString; | |
403 return newurl; | |
404 }; | |
405 | |
631 | 406 // processes some parameters into objects and stuff |
407 var unpackParams = function (data) { | |
408 var settings = data.settings; | |
636 | 409 // zoom area |
631 | 410 var zoomArea = geom.rectangle(settings.wx, settings.wy, settings.ww, settings.wh); |
643 | 411 data.zoomArea = zoomArea; |
636 | 412 // marks |
631 | 413 var marks = []; |
633 | 414 var mk = settings.mk || ''; |
415 if (mk.indexOf(";") >= 0) { | |
416 var pa = mk.split(";"); // old format with ";" | |
631 | 417 } else { |
633 | 418 var pa = mk.split(","); // new format |
631 | 419 } |
420 for (var i = 0; i < pa.length ; i++) { | |
421 var pos = pa[i].split("/"); | |
633 | 422 if (pos.length > 1) { |
423 marks.push(geom.position(pos[0], pos[1])); | |
424 } | |
631 | 425 } |
643 | 426 data.marks = marks; |
631 | 427 }; |
428 | |
429 // put objects back into parameters | |
430 var packParams = function (data) { | |
431 var settings = data.settings; | |
636 | 432 // zoom area |
643 | 433 if (data.zoomArea) { |
434 settings.wx = data.zoomArea.x; | |
435 settings.wy = data.zoomArea.y; | |
436 settings.ww = data.zoomArea.width; | |
437 settings.wh = data.zoomArea.height; | |
631 | 438 } |
636 | 439 // marks |
643 | 440 if (data.marks) { |
631 | 441 var ma = []; |
643 | 442 for (var i = 0; i < data.marks.length; i++) { |
443 ma.push(cropFloat(data.marks[i].x) + "/" + cropFloat(data.marks[i].y)); | |
631 | 444 } |
445 settings.mk = ma.join(","); | |
446 } | |
447 }; | |
448 | |
609 | 449 // returns maximum size for scaler img in fullscreen mode |
450 var getFullscreenImgSize = function($elem) { | |
451 var winH = $(window).height(); | |
452 var winW = $(window).width(); | |
453 // TODO: account for borders? | |
454 return geom.size(winW, winH); | |
608 | 455 }; |
456 | |
622 | 457 // (re)load the img from a new scaler URL |
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458 var redisplay = function (data) { |
636 | 459 var settings = data.settings; |
460 if (settings.interactionMode === 'fullscreen') { | |
461 // update location.href (browser URL) in fullscreen mode | |
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462 var url = getDigilibUrl(data); |
636 | 463 var history = window.history; |
464 if (typeof(history.pushState) === 'function') { | |
465 console.debug("we could modify history, but we don't..."); | |
466 } | |
467 window.location = url; | |
468 } else { | |
469 // embedded mode -- just change img src | |
470 var url = getScalerUrl(data); | |
471 data.$img.attr('src', url); | |
472 } | |
622 | 473 }; |
474 | |
608 | 475 // creates HTML structure for digilib in elem |
627 | 476 var setupScalerDiv = function (data) { |
477 var settings = data.settings; | |
478 var $elem = data.target; | |
623 | 479 var $img; |
608 | 480 if (settings.interactionMode === 'fullscreen') { |
609 | 481 // fullscreen |
482 var imgSize = getFullscreenImgSize($elem); | |
483 settings.dw = imgSize.width; | |
484 settings.dh = imgSize.height; | |
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485 $img = $('<img/>'); |
636 | 486 var scalerUrl = getScalerUrl(data); |
487 $img.attr('src', scalerUrl); | |
609 | 488 } else { |
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489 // embedded mode -- try to keep img tag |
623 | 490 $img = $elem.find('img'); |
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491 if ($img.length > 0) { |
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492 console.debug("img detach:",$img); |
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493 $img.detach(); |
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494 } else { |
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495 $img = $('<img/>'); |
636 | 496 var scalerUrl = getScalerUrl(data); |
497 $img.attr('src', scalerUrl); | |
613
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498 } |
608 | 499 } |
613
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500 // create new html |
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501 $elem.empty(); // TODO: should we keep stuff for customization? |
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502 var $scaler = $('<div class="scaler"/>'); |
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503 $elem.append($scaler); |
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504 $scaler.append($img); |
622 | 505 $img.addClass('pic'); |
636 | 506 data.$img = $img; |
507 $img.load(scalerImgLoadedHandler(data)); | |
608 | 508 }; |
615 | 509 |
610 | 510 // creates HTML structure for buttons in elem |
628
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511 var setupButtons = function (data, actionGroup) { |
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512 var $elem = data.target; |
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513 var settings = data.settings; |
610 | 514 if (settings.interactionMode === 'fullscreen') { |
515 // fullscreen -- create new | |
612 | 516 var $buttonsDiv = $('<div class="buttons"></div>'); |
517 $elem.append($buttonsDiv); | |
618
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518 var actionNames = settings[actionGroup]; |
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519 for (var i = 0; i < actionNames.length; i++) { |
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520 var actionName = actionNames[i]; |
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521 var actionSettings = settings.actions[actionName]; |
612 | 522 // construct the button html |
523 var $button = $('<div class="button"></div>'); | |
524 var $a = $('<a/>'); | |
614 | 525 var $img = $('<img class="button"/>'); |
612 | 526 $buttonsDiv.append($button); |
527 $button.append($a); | |
528 $a.append($img); | |
529 // add attributes and bindings | |
618
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530 $button.attr('title', actionSettings.tooltip); |
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531 $button.addClass('button-' + actionName); |
635 | 532 // create handler for the buttons |
533 $a.bind('click', (function () { | |
534 // we create a new closure to capture the value of method | |
535 var method = actionSettings.onclick; | |
619 | 536 if ($.isArray(method)) { |
635 | 537 // the handler function calls digilib with method and parameters |
538 return function () { | |
539 console.debug('click method=', method); | |
540 $elem.digilib.apply($elem, method); | |
619 | 541 }; |
635 | 542 } else { |
543 // the handler function calls digilib with method | |
544 return function () { | |
545 console.debug('click method=', method); | |
546 $elem.digilib(method); | |
547 }; | |
548 } | |
549 })()); | |
618
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550 $img.attr('src', settings.buttonsImagePath + actionSettings.img); |
637 | 551 } |
611 | 552 } |
612 | 553 return $buttonsDiv; |
610 | 554 }; |
615 | 555 |
556 // creates HTML structure for the bird's eye view in elem | |
638 | 557 var setupBirdDiv = function (data) { |
628
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558 var $elem = data.target; |
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559 var settings = data.settings; |
615 | 560 // use only the relevant parameters |
561 var keys = ['fn','pn','dw','dh']; | |
639 | 562 var birdSettings = $.extend({}, settings, settings.birdDivOptions); |
628
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563 var birdUrl = settings.scalerBaseUrl + '?' + getParamString(birdSettings, keys); |
615 | 564 // the bird's eye div |
625 | 565 var $birdviewDiv = $('<div class="birdview" style="display:none"/>'); |
615 | 566 // the detail indicator frame |
567 var $birdzoomDiv = $('<div class="birdzoom"/>'); | |
568 // the small image | |
569 var $birdImg = $('<img class="birdimg"/>'); | |
570 $elem.append($birdviewDiv); | |
571 $birdviewDiv.append($birdzoomDiv); | |
572 $birdviewDiv.append($birdImg); | |
573 $birdImg.attr('src', birdUrl); | |
640
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574 if (data.settings.isBirdDivVisible) { |
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575 $birdviewDiv.fadeIn(); |
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576 } |
635 | 577 data.$birdDiv = $birdviewDiv; |
640
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578 }; |
615 | 579 |
625 | 580 // creates HTML structure for the about view in elem |
628
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581 var setupAboutDiv = function (data) { |
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582 var $elem = data.target; |
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583 var settings = data.settings; |
625 | 584 var $aboutDiv = $('<div class="about" style="display:none"/>'); |
616 | 585 var $header = $('<p>Digilib Graphic Viewer</p>'); |
586 var $link = $('<a/>'); | |
587 var $logo = $('<img class="logo" title="digilib"/>'); | |
588 var $content = $('<p/>'); | |
589 $elem.append($aboutDiv); | |
590 $aboutDiv.append($header); | |
591 $aboutDiv.append($link); | |
592 $aboutDiv.append($content); | |
593 $link.append($logo); | |
594 $logo.attr('src', settings.logoUrl); | |
635 | 595 $link.attr('href', settings.homeUrl); |
616 | 596 $content.text('Version: ' + settings.version); |
635 | 597 // click hides |
598 $aboutDiv.bind('click', function () { showDiv(settings.isAboutDivVisible, $aboutDiv, 0); }); | |
599 data.$aboutDiv = $aboutDiv; | |
634 | 600 }; |
601 | |
635 | 602 // shows some window e.g. 'about' (toggle visibility if show is null) |
603 var showDiv = function (isVisible, $div, show) { | |
645 | 604 if (show == null) { |
635 | 605 // toggle visibility |
606 isVisible = !isVisible; | |
607 } else { | |
608 // set visibility | |
609 isVisible = show; | |
610 } | |
611 if (isVisible) { | |
612 $div.fadeIn(); | |
613 } else { | |
614 $div.fadeOut(); | |
615 } | |
616 return isVisible; | |
634 | 617 }; |
616 | 618 |
613
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619 // returns function for load event of scaler img |
636 | 620 var scalerImgLoadedHandler = function (data) { |
627 | 621 var settings = data.settings; |
622 var $elem = data.target; | |
636 | 623 var $img = data.$img; |
627 | 624 |
633 | 625 return function () { |
627 | 626 console.debug("img loaded! this=", this, " data=", data); |
643 | 627 var area = data.zoomArea; |
627 | 628 // create Transform from current area and picsize |
629 var picpos = $img.offset(); | |
630 var picrect = geom.rectangle(picpos.left, picpos.top, $img.width(), $img.height()); | |
631 var trafo = geom.transform(); | |
632 // subtract area offset and size | |
633 trafo.concat(trafo.getTranslation(geom.position(area.x, area.y))); | |
634 trafo.concat(trafo.getScale(geom.size(1/area.width, 1/area.height))); | |
635 // scale to screen size | |
636 trafo.concat(trafo.getScale(picrect)); | |
637 trafo.concat(trafo.getTranslation(picrect)); | |
638 data.imgTrafo = trafo; | |
639 // display marks | |
633 | 640 renderMarks(data); |
627 | 641 //digilib.showArrows(); // show arrow overlays for zoom navigation |
641 | 642 // done -- hide about div --- |
643 // --- why? This only leads to suprise effects when displayed programmatically | |
644 // settings.isAboutDivVisible = showDiv(null, data.$aboutDiv, 0); | |
613
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645 }; |
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646 }; |
633 | 647 |
648 // place marks on the image | |
649 var renderMarks = function (data) { | |
650 var $elem = data.target; | |
643 | 651 var marks = data.marks; |
633 | 652 for (var i = 0; i < marks.length; i++) { |
653 var mark = marks[i]; | |
643 | 654 if (data.zoomArea.containsPosition(mark)) { |
633 | 655 var mpos = data.imgTrafo.transform(mark); |
656 // create mark | |
657 var html = '<div class="mark">'+(i+1)+'</div>'; | |
658 var $mark = $(html); | |
659 $elem.append($mark); | |
660 $mark.offset({ left : mpos.x, top : mpos.y}); | |
661 } | |
662 } | |
663 }; | |
631 | 664 |
643 | 665 var zoomBy = function(data, factor) { |
666 // zooms by the given factor | |
667 var area = data.zoomArea; | |
668 var newarea = area.copy(); | |
669 // scale | |
670 newarea.width /= factor; | |
671 newarea.height /= factor; | |
672 // and recenter | |
673 newarea.x -= 0.5 * (newarea.width - area.width); | |
674 newarea.y -= 0.5 * (newarea.height - area.height); | |
675 newarea = MAX_ZOOMAREA.fit(newarea); | |
676 data.zoomArea = newarea; | |
644
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677 redisplay(data); |
643 | 678 }; |
679 | |
641 | 680 // auxiliary function (from Douglas Crockford, A.10) |
681 var isNumber = function isNumber(value) { | |
682 return typeof value === 'number' && isFinite(value); | |
683 }; | |
684 | |
631 | 685 // auxiliary function to crop senseless precision |
686 var cropFloat = function (x) { | |
637 | 687 return parseInt(10000 * x, 10) / 10000; |
631 | 688 }; |
636 | 689 |
605 | 690 // hook plugin into jquery |
691 $.fn.digilib = function(method) { | |
692 if (methods[method]) { | |
634 | 693 // call method on this with the remaining arguments |
605 | 694 return methods[method].apply(this, Array.prototype.slice.call(arguments, 1)); |
695 } else if (typeof(method) === 'object' || !method) { | |
634 | 696 // call init on this |
605 | 697 return methods.init.apply(this, arguments); |
698 } else { | |
634 | 699 $.error( 'Method ' + method + ' does not exist on jQuery.digilib' ); |
605 | 700 } |
701 }; | |
604 | 702 |
703 })(jQuery); |