Mercurial > hg > digilib
annotate client/digitallibrary/dllib.js @ 268:3800e9c37f8f
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| author | robcast |
|---|---|
| date | Tue, 12 Oct 2004 16:06:43 +0200 |
| parents | 2f4764230089 |
| children | 152ad1e1ca27 |
| rev | line source |
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1 /* Copyright (C) 2003,2004 IT-Group MPIWG, WTWG Uni Bern and others |
| 233 | 2 |
| 3 This program is free software; you can redistribute it and/or | |
| 4 modify it under the terms of the GNU General Public License | |
| 5 as published by the Free Software Foundation; either version 2 | |
| 6 of the License, or (at your option) any later version. | |
| 7 | |
| 8 This program is distributed in the hope that it will be useful, | |
| 9 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 GNU General Public License for more details. | |
| 12 | |
| 13 You should have received a copy of the GNU General Public License | |
| 14 along with this program; if not, write to the Free Software | |
| 15 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | |
| 16 | |
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17 Authors: |
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18 Christian Luginbuehl, 01.05.2003 (first version) |
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19 DW 24.03.2004 (Changed for digiLib in Zope) |
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20 Robert Casties, 04.08.2004 |
| 233 | 21 |
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22 ! Requires baselib.js ! |
| 233 | 23 |
| 24 */ | |
| 25 | |
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26 var dlScriptVersion = "1.0b2"; |
| 233 | 27 |
| 28 /* | |
| 29 * more parameter handling | |
| 30 */ | |
| 31 | |
| 32 var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0); | |
| 33 var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0); | |
| 34 | |
| 35 function parseArea() { | |
| 36 // returns area Rectangle from current parameters | |
| 37 return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh")); | |
| 38 } | |
| 39 | |
| 40 function setParamFromArea(rect) { | |
| 41 // sets digilib wx etc. from rect | |
| 42 setParameter("wx", cropFloat(rect.x)); | |
| 43 setParameter("wy", cropFloat(rect.y)); | |
| 44 setParameter("ww", cropFloat(rect.width)); | |
| 45 setParameter("wh", cropFloat(rect.height)); | |
| 46 return true; | |
| 47 } | |
| 48 | |
| 49 var dlTrafo = new Transform(); | |
| 50 | |
| 51 function parseTrafo(elem) { | |
| 52 // returns Transform from current dlArea and picsize | |
| 53 var picsize = getElementRect(elem); | |
| 54 var trafo = new Transform(); | |
| 55 // subtract area offset and size | |
| 56 trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y))); | |
| 57 trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height))); | |
| 58 // scale to screen size | |
| 59 trafo.concat(getScale(picsize)); | |
| 60 trafo.concat(getTranslation(picsize)); | |
| 61 // rotate | |
| 62 //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height))); | |
| 63 // mirror | |
| 64 //if (hasFlag("hmir")) { | |
| 65 //trafo.m00 = - trafo.m00; | |
| 66 //} | |
| 67 //if (hasFlag("vmir")) { | |
| 68 //trafo.m11 = - trafo.m11; | |
| 69 //} | |
| 70 return trafo; | |
| 71 } | |
| 72 | |
| 73 | |
| 74 var dlMarks = new Array(); | |
| 75 | |
| 76 function parseMarks() { | |
| 77 // returns marks array from current parameters | |
| 78 var marks = new Array(); | |
| 79 var ma; | |
| 80 var mk = getParameter("mk"); | |
| 81 if (mk.indexOf(";") >= 0) { | |
| 82 // old format with ";" | |
| 83 ma = mk.split(";"); | |
| 84 } else { | |
| 85 ma = mk.split(","); | |
| 86 } | |
| 87 for (var i = 0; i < ma.length ; i++) { | |
| 88 var pos = ma[i].split("/"); | |
| 89 if (pos.length > 1) { | |
| 90 marks.push(new Position(pos[0], pos[1])); | |
| 91 } | |
| 92 } | |
| 93 return marks; | |
| 94 } | |
| 95 | |
| 96 function getAllMarks() { | |
| 97 // returns a string with all marks in query format | |
| 98 var marks = new Array(); | |
| 99 for (var i = 0; i < dlMarks.length; i++) { | |
| 100 marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y)); | |
| 101 } | |
| 102 return marks.join(","); | |
| 103 } | |
| 104 | |
| 105 function addMark(pos) { | |
| 106 // add a mark | |
| 107 dlMarks.push(pos); | |
| 108 setParameter("mk", getAllMarks()); | |
| 109 return true; | |
| 110 } | |
| 111 | |
| 112 function deleteMark() { | |
| 113 // delete the last mark | |
| 114 dlMarks.pop(); | |
| 115 setParameter("mk", getAllMarks()); | |
| 116 return true; | |
| 117 } | |
| 118 | |
| 119 var dlFlags = new Object(); | |
| 120 | |
| 121 function hasFlag(mode) { | |
| 122 // returns if mode flag is set | |
| 123 return (dlFlags[mode]); | |
| 124 } | |
| 125 | |
| 126 function addFlag(mode) { | |
| 127 // add a mode flag | |
| 128 dlFlags[mode] = mode; | |
| 235 | 129 setParameter("mo", getAllFlags()); |
| 233 | 130 return true; |
| 131 } | |
| 132 | |
| 133 function removeFlag(mode) { | |
| 134 // remove a mode flag | |
| 135 if (dlFlags[mode]) { | |
| 136 delete dlFlags[mode]; | |
| 137 } | |
| 235 | 138 setParameter("mo", getAllFlags()); |
| 233 | 139 return true; |
| 140 } | |
| 141 | |
| 142 function toggleFlag(mode) { | |
| 143 // change a mode flag | |
| 144 if (dlFlags[mode]) { | |
| 145 delete dlFlags[mode]; | |
| 146 } else { | |
| 147 dlFlags[mode] = mode; | |
| 148 } | |
| 235 | 149 setParameter("mo", getAllFlags()); |
| 233 | 150 return true; |
| 151 } | |
| 152 | |
| 153 function getAllFlags() { | |
| 154 // returns a string with all flags in query format | |
| 155 var fa = new Array(); | |
| 156 for (var f in dlFlags) { | |
| 157 if ((f != "")&&(dlFlags[f] != null)) { | |
| 158 fa.push(f); | |
| 159 } | |
| 160 } | |
| 161 return fa.join(","); | |
| 162 } | |
| 163 | |
| 164 function parseFlags() { | |
| 165 // sets dlFlags from the current parameters | |
| 166 var flags = new Object(); | |
| 167 var fa = getParameter("mo").split(","); | |
| 168 for (var i = 0; i < fa.length ; i++) { | |
| 169 var f = fa[i]; | |
| 170 if (f != "") { | |
| 171 flags[f] = f; | |
| 172 } | |
| 173 } | |
| 174 return flags; | |
| 175 } | |
| 176 | |
| 177 | |
| 178 function bestPicSize(elem, inset) { | |
| 179 // returns a Size with the best image size for the given element | |
| 180 if (! defined(inset)) { | |
| 181 inset = 25; | |
| 182 } | |
| 183 var ws = getWinSize(); | |
| 184 var es = getElementPosition(elem); | |
| 185 if (es) { | |
| 186 ws.width = ws.width - es.x - inset; | |
| 187 ws.height = ws.height - es.y - inset; | |
| 188 } | |
| 189 return ws; | |
| 190 } | |
| 191 | |
| 192 | |
| 193 /* ********************************************** | |
| 194 * digilib specific routines | |
| 195 * ******************************************** */ | |
| 196 | |
| 197 var elemScaler = null; | |
| 198 var picElem = null; | |
| 199 | |
| 234 | 200 |
| 201 function dl_param_init() { | |
| 202 // parameter initialisation before onload | |
| 203 | |
| 204 // put the query parameters (sans "?") in the parameters array | |
| 205 parseParameters(location.search.slice(1)); | |
| 206 // treat special parameters | |
| 207 dlMarks = parseMarks(); | |
| 208 dlArea = parseArea(); | |
| 209 dlFlags = parseFlags(); | |
| 210 } | |
| 211 | |
| 212 | |
| 233 | 213 function dl_init() { |
| 234 | 214 // initalisation on load |
| 233 | 215 elemScaler = getElement("scaler", true); |
| 216 picElem = getElement("pic", true); | |
| 217 if (picElem == null && elemScaler) { | |
| 218 // in N4 pic is in the scaler layer | |
| 219 picElem = elemScaler.document.images[0]; | |
| 220 } | |
| 221 if ((!elemScaler)||(!picElem)) { | |
| 222 alert("Sorry, zogilib doesn't work here!"); | |
| 223 return false; | |
| 224 } | |
| 225 // give a name to the window containing digilib | |
| 226 if (defined(dlTarget)&&(dlTarget)) { | |
| 227 window.name = dlTarget; | |
| 228 } else { | |
| 229 window.name = "digilib"; | |
| 230 } | |
| 231 // put the query parameters (sans "?") in the parameters array | |
| 232 parseParameters(location.search.slice(1)); | |
| 233 // treat special parameters | |
| 234 dlMarks = parseMarks(); | |
| 235 dlArea = parseArea(); | |
| 236 dlFlags = parseFlags(); | |
| 237 // wait for image to load and display marks | |
| 238 renderMarks(); | |
| 239 // done | |
| 240 focus(); | |
| 241 return; | |
| 242 } | |
| 243 | |
| 244 | |
| 245 function display(detail) { | |
| 246 // redisplay the page | |
| 247 if (! detail) { | |
| 248 detail = 9; | |
| 249 } | |
| 250 var queryString = getAllParameters(detail); | |
| 251 location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString; | |
| 252 } | |
| 253 | |
| 254 | |
| 255 /* ********************************************** | |
| 256 * interactive digilib functions | |
| 257 * ******************************************** */ | |
| 258 | |
| 259 | |
| 260 function renderMarks() { | |
| 261 // put the visible marks on the image | |
| 262 var mark_count = dlMarks.length; | |
| 263 // make shure the image is loaded so we know its size | |
| 264 if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) { | |
| 265 setTimeout("renderMarks()", 100); | |
| 266 } else { | |
| 267 dlTrafo = parseTrafo(picElem); | |
| 268 for (var i = 0; i < 8; i++) { | |
| 269 var me = getElement("dot"+i); | |
| 270 if (i < mark_count) { | |
| 271 if (dlArea.containsPosition(dlMarks[i])) { | |
| 272 var mpos = dlTrafo.transform(dlMarks[i]); | |
| 273 // suboptimal to place -5 pixels and not half size of mark-image | |
| 274 mpos.x = mpos.x -5; | |
| 275 mpos.y = mpos.y -5; | |
| 276 moveElement(me, mpos); | |
| 277 showElement(me, true); | |
| 278 } | |
| 279 } else { | |
| 280 // hide the other marks | |
| 281 showElement(me, false); | |
| 282 } | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 | |
| 235 | 288 function setMark(reload) { |
| 233 | 289 // add a mark where clicked |
| 290 if ( dlMarks.length > 7 ) { | |
| 291 alert("Only 8 marks are possible at the moment!"); | |
| 292 return; | |
| 293 } | |
| 294 | |
| 295 function markEvent(evt) { | |
| 296 // event handler adding a new mark | |
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297 unregisterEvent("mousedown", elemScaler, markEvent); |
| 233 | 298 var p = dlTrafo.invtransform(evtPosition(evt)); |
| 299 addMark(p); | |
| 235 | 300 if (defined(reload)&&(!reload)) { |
| 301 // don't redisplay | |
| 302 renderMarks(); | |
| 303 return; | |
| 304 } | |
| 233 | 305 display(); |
| 306 } | |
| 307 | |
| 308 // starting event capture | |
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309 registerEvent("mousedown", elemScaler, markEvent); |
| 233 | 310 } |
| 311 | |
| 312 | |
| 235 | 313 function removeMark(reload) { |
| 314 // remove the last mark | |
| 315 deleteMark(); | |
| 316 if (defined(reload)&&(!reload)) { | |
| 317 // don't redisplay | |
| 318 renderMarks(); | |
| 319 return; | |
| 320 } | |
| 321 display(); | |
| 322 } | |
| 323 | |
| 324 | |
| 233 | 325 function zoomArea() { |
| 326 var click = 1; | |
| 327 var pt1, pt2; | |
| 328 var eck1pos, eck2pos, eck3pos, eck4pos; | |
| 329 window.focus(); | |
| 330 var eck1 = getElement("eck1"); | |
| 331 var eck2 = getElement("eck2"); | |
| 332 var eck3 = getElement("eck3"); | |
| 333 var eck4 = getElement("eck4"); | |
| 334 | |
| 335 function zoomClick(evt) { | |
| 336 // mouse click handler | |
| 337 if (click == 1) { | |
| 338 // first click -- start moving | |
| 339 click = 2; | |
| 340 pt1 = evtPosition(evt); | |
| 341 pt2 = pt1; | |
| 342 eck1pos = pt1; | |
| 343 eck2pos = new Position(pt1.x - 12, pt1.y); | |
| 344 eck3pos = new Position(pt1.x, pt1.y - 12); | |
| 345 eck4pos = new Position(pt1.y - 12, pt1.y - 12); | |
| 346 moveElement(eck1, eck1pos); | |
| 347 moveElement(eck2, eck2pos); | |
| 348 moveElement(eck3, eck3pos); | |
| 349 moveElement(eck4, eck4pos); | |
| 350 showElement(eck1, true); | |
| 351 showElement(eck2, true); | |
| 352 showElement(eck3, true); | |
| 353 showElement(eck4, true); | |
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354 // show moving |
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355 registerEvent("mousemove", elemScaler, zoomMove); |
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356 registerEvent("mousemove", eck4, zoomMove); |
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357 // enable drag-to-zoom |
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358 registerEvent("mouseup", elemScaler, zoomClick); |
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359 registerEvent("mouseup", eck4, zoomClick); |
| 233 | 360 } else { |
| 361 // second click -- end moving | |
| 362 pt2 = evtPosition(evt); | |
| 363 showElement(eck1, false); | |
| 364 showElement(eck2, false); | |
| 365 showElement(eck3, false); | |
| 366 showElement(eck4, false); | |
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367 unregisterEvent("mousemove", elemScaler, zoomMove); |
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368 unregisterEvent("mousemove", eck4, zoomMove); |
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369 unregisterEvent("mousedown", elemScaler, zoomClick); |
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370 unregisterEvent("mousedown", eck4, zoomClick); |
| 233 | 371 var p1 = dlTrafo.invtransform(pt1); |
| 372 var p2 = dlTrafo.invtransform(pt2); | |
| 373 var ww = p2.x-p1.x; | |
| 374 var wh = p2.y-p1.y; | |
| 375 if ((ww > 0)&&(wh > 0)) { | |
| 376 setParameter("wx", cropFloat(p1.x)); | |
| 377 setParameter("wy", cropFloat(p1.y)); | |
| 378 setParameter("ww", cropFloat(ww)); | |
| 379 setParameter("wh", cropFloat(wh)); | |
| 380 parseArea(); | |
| 381 // zoomed is always fit | |
| 382 setParameter("ws", 1); | |
| 383 display(); | |
| 384 } | |
| 385 } | |
| 386 } | |
| 387 | |
| 388 function zoomMove(evt) { | |
| 389 // mouse move handler | |
| 390 pt2 = evtPosition(evt); | |
| 391 // restrict marks to move right and down | |
| 392 eck1pos = pt1; | |
| 393 eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y); | |
| 394 eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12); | |
| 395 eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12); | |
| 396 moveElement(eck1, eck1pos); | |
| 397 moveElement(eck2, eck2pos); | |
| 398 moveElement(eck3, eck3pos); | |
| 399 moveElement(eck4, eck4pos); | |
| 400 } | |
| 401 | |
| 402 // starting event capture | |
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403 registerEvent("mousedown", elemScaler, zoomClick); |
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404 registerEvent("mousedown", eck4, zoomClick); |
| 233 | 405 } |
| 406 | |
| 407 var ZOOMFACTOR = Math.sqrt(2); | |
| 408 | |
| 409 function zoomBy(factor) { | |
| 410 // zooms by the given factor | |
| 235 | 411 var newarea = dlArea.copy(); |
| 233 | 412 newarea.width /= factor; |
| 413 newarea.height /= factor; | |
| 414 newarea.x -= 0.5 * (newarea.width - dlArea.width); | |
| 415 newarea.y -= 0.5 * (newarea.height - dlArea.height); | |
| 416 newarea = dlMaxArea.fit(newarea); | |
| 417 setParamFromArea(newarea); | |
| 418 display(); | |
| 419 } | |
| 420 | |
| 421 | |
| 422 function zoomFullpage() { | |
| 423 // zooms out to show the whole image | |
| 424 setParameter("wx", 0.0); | |
| 425 setParameter("wy", 0.0); | |
| 426 setParameter("ww", 1.0); | |
| 427 setParameter("wh", 1.0); | |
| 428 display(); | |
| 429 } | |
| 430 | |
| 431 | |
| 432 function moveCenter() { | |
| 433 // move visible area so that it's centered around the clicked point | |
| 434 if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) { | |
| 435 // noting to do | |
| 436 return; | |
| 437 } | |
| 438 window.focus(); | |
| 439 | |
| 440 function moveCenterEvent(evt) { | |
| 441 // move to handler | |
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442 unregisterEvent("mousedown", elemScaler, moveCenterEvent); |
| 233 | 443 var pt = dlTrafo.invtransform(evtPosition(evt)); |
| 444 var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height); | |
| 445 newarea = dlMaxArea.fit(newarea); | |
| 446 // set parameters | |
| 447 setParamFromArea(newarea); | |
| 448 parseArea(); | |
| 449 display(); | |
| 450 } | |
| 451 | |
| 452 // starting event capture | |
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453 registerEvent("mousedown", elemScaler, moveCenterEvent); |
| 233 | 454 } |
| 455 | |
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456 function moveBy(movx, movy) { |
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457 // move visible area by movx and movy (in units of dw, dh) |
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458 if ((dlArea.width == 1.0)&&(dlArea.height == 1.0)) { |
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459 // nothing to do |
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460 return; |
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461 } |
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462 var newarea = dlArea.copy(); |
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463 newarea.x += parseFloat(movx)*dlArea.width; |
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464 newarea.y += parseFloat(movy)*dlArea.height; |
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465 newarea = dlMaxArea.fit(newarea); |
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466 // set parameters |
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467 setParamFromArea(newarea); |
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468 parseArea(); |
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469 display(); |
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470 } |
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471 |
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new digimage with red triangles for moving the zoomed area
robcast
parents:
235
diff
changeset
|
472 |
| 233 | 473 |
| 474 | |
| 234 | 475 function getRef() { |
| 233 | 476 // returns a reference to the current digilib set |
| 477 if (! baseUrl) { | |
| 478 var baseUrl = location.protocol + "//" + location.host + location.pathname; | |
| 479 } | |
| 480 var hyperlinkRef = baseUrl; | |
| 481 var par = getAllParameters(9); | |
| 482 if (par.length > 0) { | |
| 483 hyperlinkRef += "?" + par; | |
| 484 } | |
| 485 return hyperlinkRef; | |
| 486 } |