Annotation of zogiLib/js/navigation.js, revision 1.2
1.1 dwinter 1: /*
2:
3: Copyright (C) 2003 WTWG, Uni Bern
4:
5: This program is free software; you can redistribute it and/or
6: modify it under the terms of the GNU General Public License
7: as published by the Free Software Foundation; either version 2
8: of the License, or (at your option) any later version.
9:
10: This program is distributed in the hope that it will be useful,
11: but WITHOUT ANY WARRANTY; without even the implied warranty of
12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13: GNU General Public License for more details.
14:
15: You should have received a copy of the GNU General Public License
16: along with this program; if not, write to the Free Software
17: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
18:
19: Author: Christian Luginbuehl, 01.05.2003 , Version Alcatraz 0.4
20: Changed for digiLib in Zope by DW 24.03.2004
21: */
22:
23: var ZOOMFACTOR = Math.sqrt(2);
24:
25: dlParams = new Object();
26:
27: function newParameter(name, value, defaultValue, detail) {
28:
29: if ( !dlParams[name] ) {
30:
31: dlParams[name] = new Object();
32:
33: dlParams[name].value = value;
34: dlParams[name].defaultValue = defaultValue;
35: dlParams[name].detail = detail;
36:
37: return dlParams[name];
38:
39: } else {
40:
41: alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
42: return false;
43:
44: }
45: }
46:
47: function getParameter(name) {
48:
49: if ( dlParams[name] ) {
50: return dlParams[name].value;
51: } else {
52: return false;
53: }
54: }
55:
56:
57:
58: function listParametersAsString() {
59:
60: var params = new Array();
61:
62: for ( param in dlParams ) {
63: params.push(param);
64: }
65:
66: return params.join(",");
67:
68: }
69:
70:
71: function listParameters() {
72:
73: var params = new Array();
74:
75: for ( param in dlParams ) {
76: params.push(param);
77: }
78:
79: return params;
80:
81: }
82:
83:
84: function init() {
85:
86: // give a name to the window containing digilib - this way one can test if there is already a
87: // digilib-window open and replace the contents of it (ex. digicat)
88: top.window.name = "digilib";
89:
90:
91: placeMarks();
92:
93: if ( document.all ) {
94: this.document.onkeypress = parseKeypress;
95: } else if ( typeof(document.addEventListener) == "function" ) {
96: this.document.addEventListener('keypress', parseKeypress, true);
97: } else {
98: window.captureEvents(Event.KEYDOWN);
99: window.onkeydown = parseKeypress;
100: }
101:
102: focus();
103: }
104:
105:
106: function display(detail) {
107:
108: var queryString = '';
109:
110: for ( param in dlParams ) {
111:
112: if ( dlParams[param].defaultValue != dlParams[param].value ) {
113: if ( dlParams[param].detail <= detail ) {
114: queryString += "&" + param + "=" + dlParams[param].value;
115: } else {
116: queryString += "&" + param + "=" + dlParams[param].defaultValue;
117: }
118: }
119:
120: }
121:
122: // window size
123: var wwidth, wheight;
124: if (self.innerHeight) // all except Explorer
125: {
126: wwidth = self.innerWidth;
127: wheight = self.innerHeight;
128: }
129: else if (document.documentElement && document.documentElement.clientHeight)
130: // Explorer 6 Strict Mode
131: {
132: wwidth = document.documentElement.clientWidth;
133: wheight = document.documentElement.clientHeight;
134: }
135: else if (document.body) // other Explorers
136: {
137: wwidth = document.body.clientWidth;
138: wheight = document.body.clientHeight;
139: }
140: //queryString += "&dw=" + (wwidth-30) + "&dh=" + (wheight-30); # not needed DW
141:
142: queryString += "&lv=1";
143:
144: queryString = queryString.slice(1);
145:
146: location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
147:
148: }
149:
150:
151: // constructor holding different values of a point
152: function Point(evt) {
153:
154: if ( document.all ) {
155:
156: this.pageX = parseInt(document.body.scrollLeft+event.clientX);
157: this.pageY = parseInt(document.body.scrollLeft+event.clientY);
158:
159: this.x = this.pageX-parseInt(document.all.scaler.offsetLeft);
160: this.y = this.pageY-parseInt(document.all.scaler.offsetTop);
161:
162: this.relX = cropFloat(parseFloat(dlParams.wx.value)+(dlParams.ww.value*this.x/document.all.scaler.offsetWidth));
163: this.relY = cropFloat(parseFloat(dlParams.wy.value)+(dlParams.wh.value*this.y/document.all.scaler.offsetHeight));
164:
165: } else {
166:
167: this.pageX = parseInt(evt.pageX);
168: this.pageY = parseInt(evt.pageY);
169:
170: if ( typeof(document.getElementById) == "function" ) {
171:
172: this.x = this.pageX-parseInt(document.getElementById("scaler").offsetLeft);
173: this.y = this.pageY-parseInt(document.getElementById("scaler").offsetTop);
174: // top("2"+"::"+this.pageX+"::"+parseInt(document.getElementById("scaler").offsetLeft)+'::'+document.getElementById("scaler").offsetLeft);
175: this.relX = cropFloat(parseFloat(dlParams.wx.value)+(dlParams.ww.value*this.x/document.pic.offsetWidth));
176: this.relY = cropFloat(parseFloat(dlParams.wy.value)+(dlParams.wh.value*this.y/document.pic.offsetHeight));
177:
178: } else {
179:
180: this.x = this.pageX-document.scaler.left;
181: this.y = this.pageY-document.scaler.top;
182:
183: this.relX = cropFloat(parseFloat(dlParams.wx.value)+(dlParams.ww.value*this.x/document.scaler.clip.width));
184: this.relY = cropFloat(parseFloat(dlParams.wy.value)+(dlParams.wh.value*this.y/document.scaler.clip.height));
185:
186: }
187:
188: }
189:
190: return this;
191:
192: }
193:
194:
195: function page(page, details) {
196:
197: if ( details == null ) {
198: details = 1;
199: }
200:
201: if ( page.indexOf('-') == 0 ) {
202: if ( dlParams.pn.value > 1 ) {
203: page = Math.max(parseInt(dlParams.pn.value) - parseInt(page.slice(1)), 1);
204: dlParams.pn.value = page;
205: display(details);
206: } else {
207: alert("You are already on the first page!");
208: }
209:
210: } else if ( page.indexOf('+') == 0 ) {
211: page = parseInt(dlParams.pn.value) + parseInt(page.slice(1));
212: dlParams.pn.value = page;
213: display(details);
214: } else if ( page == parseInt(page) ) {
215: dlParams.pn.value = parseInt(page);
216: display(details);
217: }
218:
219: }
220:
221:
222: function digicat() {
223:
224: var url = baseUrl + "/digicat.jsp?" + dlParams.fn.value + "+" + dlParams.pn.value;
225: win = window.open(url, "digicat");
226: win.focus();
227:
228: }
229:
230:
231: function ref(select) {
232:
233: var hyperlinkRef = baseUrl + "?";
234: hyperlinkRef += "fn="+dlParams.fn.value + "&pn=" + dlParams.pn.value + "&ws=" + dlParams.ws.value + "&mo=";
235: hyperlinkRef += dlParams.mo.value + "&mk=" + dlParams.mk.value;
236:
237: if ( (dlParams.wx.value != 0) || (dlParams.wy.value != 0) || (dlParams.ww.value != 1) || (dlParams.wh.value != 1) ) {
238: hyperlinkRef += "&wx=" + dlParams.wx.value + "&wy=" + dlParams.wy.value + "&ww=" + dlParams.ww.value;
239: hyperlinkRef += "&wh=" + dlParams.wh.value;
240: }
241:
242: if ( select == 0 ) {
243: prompt("Link for LaTeX-documents", "\\href{" + hyperlinkRef + "}{TEXT}");
244: } else if ( select == 1 ) {
245: prompt("Link for HTML-documents", hyperlinkRef);
246: }
247: }
248:
249:
250: function mark() {
251:
252: if ( dlParams.mk.value.split(";").length > 7 ) {
253: alert("Only 8 marks are possible at the moment!");
254: return;
255: }
256:
257: function markEvent(evt) {
258:
259: var point = new Point(evt);
260:
261: if ( dlParams.mk.value != '' ) {
262: dlParams.mk.value += ';';
263: }
264:
265: dlParams.mk.value += point.relX + '/' + point.relY;
266:
267: // stopping event capture
268: if ( document.all ) {
269: document.all.scaler.onmousedown = null;
270: } else if ( typeof(document.removeEventListener) == "function" ) {
271: document.getElementById("scaler").removeEventListener("mousedown", markEvent, true);
272: } else {
273: document.scaler.releaseEvents(Event.MOUSEDOWN);
274: }
275:
276: placeMarks();
277:
278: }
279:
280: // starting event capture
281: if ( document.all ) {
282: document.all.scaler.onmousedown = markEvent;
283: } else if ( typeof(document.addEventListener) == "function" ) {
284: document.getElementById("scaler").addEventListener("mousedown", markEvent, true);
285: } else {
286: document.scaler.captureEvents(Event.MOUSEDOWN);
287: document.scaler.onmousedown = markEvent;
288: }
289: }
290:
291:
292: function placeMarks() {
293:
294: if ( dlParams.mk.value != '' ) {
295:
296: var mark = dlParams.mk.value.split(";");
297: var mark_count = mark.length;
298:
299: // maximum of marks is 8
300: // we do not report this error because this is already done in function 'mark'
301: if ( mark_count > 8 ) mark_count = 8;
302:
303: var picWidth = (document.all) ? parseInt(document.all.scaler.offsetWidth) : (typeof(document.getElementById) == "function") ? parseInt(document.pic.offsetWidth) : parseInt(document.pic.clip.width);
304: var picHeight = (document.all) ? parseInt(document.all.scaler.offsetHeight) : (typeof(document.getElementById) == "function") ? parseInt(document.pic.offsetHeight) : parseInt(document.pic.clip.height);
305:
306: // catch the s where the picture had not been loaded already and
307: // make a timeout so that the coordinates are calculated with the real dimensions
308: //if ( (document.pic.complete) || (picWidth > 30) ) {
309: if ( (picWidth > 30) ) {
310:
311: var xOffset = (document.all) ? parseInt(document.all.scaler.offsetLeft) : (typeof(document.getElementById) == "function") ? parseInt(document.getElementById('scaler').offsetLeft) : document.scaler.left;
312: var yOffset = (document.all) ? parseInt(document.all.scaler.offsetTop) : (typeof(document.getElementById) == "function") ? parseInt(document.getElementById('scaler').offsetTop) : document.scaler.top;
313:
314: for (var i = 0; i < mark_count; i++) {
315: mark[i] = mark[i].split("/");
316:
317: if ( (mark[i][0] >= dlParams.wx.value) && (mark[i][1] >= dlParams.wy.value) && (mark[i][0] <= (parseFloat(dlParams.wx.value) + parseFloat(dlParams.ww.value))) && (mark[i][1] <= (parseFloat(dlParams.wy.value) + parseFloat(dlParams.wh.value))) ) {
318:
319: mark[i][0] = parseInt(xOffset + picWidth * (mark[i][0] - dlParams.wx.value)/dlParams.ww.value);
320: mark[i][1] = parseInt(yOffset + picHeight * (mark[i][1] - dlParams.wy.value)/dlParams.wh.value);
321:
322: if ( (document.all) || (typeof(document.getElementById) == "function") ) {
323: // suboptimal to place -5 pixels and not half size of mark-image
324: // should be changed in the future
325: document.getElementById("dot" + i).style.left = mark[i][0]-5;
326: document.getElementById("dot" + i).style.top = mark[i][1]-5;
327: document.getElementById("dot" + i).style.visibility = "visible";
328: } else {
329: document.layers[i+1].moveTo(mark[i][0]-5, mark[i][1]-5);
330: document.layers[i+1].visibility = "show";
331: }
332: }
333: }
334:
335: } else {
336: setTimeout("placeMarks()", 100);
337: }
338: }
339: }
340:
341:
342: function zoomPoint() {
1.2 ! dwinter 343: window.focus()
1.1 dwinter 344: function zoomPointEvent(evt) {
345:
346: var point = new Point(evt);
347:
348: dlParams.wx.value = cropFloat(point.relX-0.5*dlParams.ww.value*(1/ZOOMFACTOR));
349: dlParams.wy.value = cropFloat(point.relY-0.5*dlParams.wh.value*(1/ZOOMFACTOR));
350:
351: dlParams.ww.value = cropFloat(dlParams.ww.value*(1/ZOOMFACTOR));
352: dlParams.wh.value = cropFloat(dlParams.wh.value*(1/ZOOMFACTOR));
353:
354: if ( dlParams.wx.value < 0 ) {
355: dlParams.wx.value = 0;
356: }
357: if ( dlParams.wy.value < 0 ) {
358: dlParams.wy.value = 0;
359: }
360: if ( dlParams.wx.value + dlParams.ww.value > 1 ) {
361: dlParams.wx.value = 1 - dlParams.ww.value;
362: }
363: if ( dlParams.wy.value + dlParams.wh.value > 1 ) {
364: dlParams.wy.value = 1 - dlParams.wh.value;
365: }
366:
367: // stopping event capture
368: if ( document.all ) {
369: document.all.scaler.onmousedown = null;
370: } else if ( typeof(document.removeEventListener) == "function" ) {
371: document.getElementById("scaler").removeEventListener("mousedown", zoomPointEvent, true);
372: } else {
373: document.scaler.releaseEvents(Event.MOUSEDOWN);
374: }
375:
376: display(3);
377: }
378:
379: // starting event capture
380: if ( document.all ) {
381: document.all.scaler.onmousedown = zoomPointEvent;
382: } else if ( typeof(document.addEventListener) == "function" ) {
383: document.getElementById("scaler").addEventListener("mousedown", zoomPointEvent, true);
384: } else {
385: document.scaler.captureEvents(Event.MOUSEDOWN);
386: document.scaler.onmousedown = zoomPointEvent;
387: }
388: }
389:
390:
391: function zoomArea() {
392: var state = 0;
393: var pt1, pt2;
1.2 ! dwinter 394: window.focus()
1.1 dwinter 395:
396: function click(evt) {
397:
398: if (state == 0) {
399: state = 1;
400:
401: pt1 = new Point(evt);
402:
403: pt2 = pt1;
404:
405: if ( document.all ) {
406:
407: document.all.eck1.style.left = pt1.pageX;
408: document.all.eck1.style.top = pt1.pageY;
409: document.all.eck2.style.left = pt2.pageX-12;
410: document.all.eck2.style.top = pt1.pageY;
411: document.all.eck3.style.left = pt1.pageX;
412: document.all.eck3.style.top = pt2.pageY-12;
413: document.all.eck4.style.left = pt2.pageX-12;
414: document.all.eck4.style.top = pt2.pageY-12;
415:
416: document.all.eck1.style.visibility="visible";
417: document.all.eck2.style.visibility="visible";
418: document.all.eck3.style.visibility="visible";
419: document.all.eck4.style.visibility="visible";
420:
421: document.all.scaler.onmousemove = move;
422: document.all.eck4.onmousemove = move;
423:
424: } else if ( typeof(document.addEventListener) == "function" ) {
425:
426: document.getElementById("eck1").style.left = pt1.pageX;
427: document.getElementById("eck1").style.top = pt1.pageY;
428: document.getElementById("eck2").style.left = pt2.pageX-12;
429: document.getElementById("eck2").style.top = pt1.pageY;
430: document.getElementById("eck3").style.left = pt1.pageX;
431: document.getElementById("eck3").style.top = pt2.pageY-12;
432: document.getElementById("eck4").style.left = pt2.pageX-12;
433: document.getElementById("eck4").style.top = pt2.pageY-12;
434:
435: document.getElementById("eck1").style.visibility="visible";
436: document.getElementById("eck2").style.visibility="visible";
437: document.getElementById("eck3").style.visibility="visible";
438: document.getElementById("eck4").style.visibility="visible";
439:
440: document.getElementById("scaler").addEventListener("mousemove", move, true);
441: document.getElementById("eck4").addEventListener("mousemove", move, true);
442:
443: } else {
444:
445: document.eck1.moveTo(pt1.pageX, pt1.pageY);
446: document.eck2.moveTo(pt2.pageX-12, pt1.pageY);
447: document.eck3.moveTo(pt1.pageX, pt2.pageY-12);
448: document.eck4.moveTo(pt2.pageX-12, pt2.pageY-12);
449:
450: document.eck1.visibility="show";
451: document.eck2.visibility="show";
452: document.eck3.visibility="show";
453: document.eck4.visibility="show";
454:
455: document.scaler.captureEvents(Event.MOUSEMOVE);
456: document.eck4.captureEvents(Event.MOUSEMOVE);
457: document.scaler.onmousemove = move;
458: document.eck4.onmousemove = move;
459:
460: }
461:
462: } else {
463:
464: pt2 = new Point(evt);
465:
466: if ( document.all ) {
467:
468: document.all.eck1.visibility="hidden";
469: document.all.eck2.visibility="hidden";
470: document.all.eck3.visibility="hidden";
471: document.all.eck4.visibility="hidden";
472:
473: document.all.scaler.onmousedown = null;
474: document.all.eck4.onmousedown = null;
475: document.all.scaler.onmousemove = null;
476: document.all.eck4.onmousemove = null;
477:
478: } else if ( typeof(document.removeEventListener) == "function" ) {
479:
480: document.getElementById("eck1").style.visibility="hidden";
481: document.getElementById("eck2").style.visibility="hidden";
482: document.getElementById("eck3").style.visibility="hidden";
483: document.getElementById("eck4").style.visibility="hidden";
484:
485: document.getElementById("scaler").removeEventListener("mousedown", click, true);
486: document.getElementById("eck4").removeEventListener("mousedown", click, true);
487: document.getElementById("scaler").removeEventListener("mousemove", move, true);
488: document.getElementById("eck4").removeEventListener("mousemove", move, true);
489:
490: } else {
491:
492: document.eck1.visibility="hide";
493: document.eck2.visibility="hide";
494: document.eck3.visibility="hide";
495: document.eck4.visibility="hide";
496:
497: document.scaler.releaseEvents(Event.MOUSEDOWN);
498: document.eck4.releaseEvents(Event.MOUSEDOWN);
499: document.scaler.releaseEvents(Event.MOUSEMOVE);
500: document.eck4.releaseEvents(Event.MOUSEMOVE);
501:
502: }
503:
504: dlParams.wx.value = cropFloat(parseFloat(Math.min(pt1.relX, pt2.relX)));
505:
506: dlParams.wy.value = cropFloat(parseFloat(Math.min(pt1.relY, pt2.relY)));
507:
508: dlParams.ww.value = cropFloat(parseFloat(Math.abs(pt1.relX-pt2.relX)));
509: dlParams.wh.value = cropFloat(parseFloat(Math.abs(pt1.relY-pt2.relY)));
510:
511: if ( (dlParams.ww.value != 0) && (dlParams.wh.value != 0) ) {
512: display(3);
513: }
514: }
515: }
516:
517: function move(evt) {
518:
519: pt2 = new Point(evt);
520:
521: var eck1_left = ((pt1.pageX < pt2.pageX) ? pt1.pageX : pt2.pageX);
522: var eck1_top = ((pt1.pageY < pt2.pageY) ? pt1.pageY : pt2.pageY);
523: var eck2_left = ((pt1.pageX < pt2.pageX) ? pt2.pageX : pt1.pageX)-12;;
524: var eck2_top = ((pt1.pageY < pt2.pageY) ? pt1.pageY : pt2.pageY);
525: var eck3_left = ((pt1.pageX < pt2.pageX) ? pt1.pageX : pt2.pageX);
526: var eck3_top = ((pt1.pageY < pt2.pageY) ? pt2.pageY : pt1.pageY)-12;
527: var eck4_left = ((pt1.pageX < pt2.pageX) ? pt2.pageX : pt1.pageX)-12;
528: var eck4_top = ((pt1.pageY < pt2.pageY) ? pt2.pageY : pt1.pageY)-12;
529:
530: if ( document.all ) {
531:
532: document.all.eck1.style.left = eck1_left;
533: document.all.eck1.style.top = eck1_top;
534: document.all.eck2.style.left = eck2_left;
535: document.all.eck2.style.top = eck2_top;
536: document.all.eck3.style.left = eck3_left;
537: document.all.eck3.style.top = eck3_top;
538: document.all.eck4.style.left = eck4_left;
539: document.all.eck4.style.top = eck4_top;
540:
541: } else if ( typeof(document.getElementById) == "function" ) {
542:
543: document.getElementById("eck1").style.left = eck1_left;
544: document.getElementById("eck1").style.top = eck1_top;
545: document.getElementById("eck2").style.left = eck2_left;
546: document.getElementById("eck2").style.top = eck2_top;
547: document.getElementById("eck3").style.left = eck3_left;
548: document.getElementById("eck3").style.top = eck3_top;
549: document.getElementById("eck4").style.left = eck4_left;
550: document.getElementById("eck4").style.top = eck4_top;
551:
552: } else {
553:
554: document.eck1.moveTo(eck1_left, eck1_top);
555: document.eck2.moveTo(eck2_left, eck2_top);
556: document.eck3.moveTo(eck3_left, eck3_top);
557: document.eck4.moveTo(eck4_left, eck4_top);
558:
559: }
560: }
561:
562: // starting event capture
563: if ( document.all ) {
564: document.all.scaler.onmousedown = click;
565: document.all.eck4.onmousedown = click;
566: } else if ( typeof(document.addEventListener) == "function" ) {
567: document.getElementById("scaler").addEventListener("mousedown", click, true);
568: document.getElementById("eck4").addEventListener("mousedown", click, true);
569: } else {
570: document.scaler.captureEvents(Event.MOUSEDOWN);
571: document.eck4.captureEvents(Event.MOUSEDOWN);
572: document.scaler.onmousedown = click;
573: document.eck4.onmousedown = click;
574: }
575: }
576:
577:
578: function zoomExtends() {
579:
580: dlParams.wx.value = 0.0;
581: dlParams.wy.value = 0.0;
582:
583: dlParams.ww.value = 1.0;
584: dlParams.wh.value = 1.0;
585:
586: display(3);
587:
588: }
589:
590:
591: function zoomOut() {
592:
593: dlParams.wx.value = cropFloat(dlParams.wx.value-0.5*(dlParams.ww.value*(ZOOMFACTOR)-dlParams.ww.value));
594: dlParams.wy.value = cropFloat(dlParams.wy.value-0.5*(dlParams.wh.value*(ZOOMFACTOR)-dlParams.wh.value));
595:
596: dlParams.ww.value = cropFloat(dlParams.ww.value*(ZOOMFACTOR));
597: dlParams.wh.value = cropFloat(dlParams.wh.value*(ZOOMFACTOR));
598:
599: if ( dlParams.wx.value < 0 ) {
600: dlParams.wx.value = 0;
601: }
602: if ( dlParams.wy.value < 0 ) {
603: dlParams.wy.value = 0;
604: }
605: if ( dlParams.ww.value > 1 ) {
606: dlParams.ww.value = 1;
607: }
608: if ( dlParams.wh.value > 1 ) {
609: dlParams.wh.value = 1;
610: }
611: if ( dlParams.wx.value + dlParams.ww.value > 1 ) {
612: dlParams.wx.value = 1 - dlParams.ww.value;
613: }
614: if ( dlParams.wy.value + dlParams.wh.value > 1 ) {
615: dlParams.wy.value = 1 - dlParams.wh.value;
616: }
617:
618: display(3);
619: }
620:
621:
622: function moveTo() {
623:
624: if ( (parseFloat(dlParams.ww.value) == 1.0) && (parseFloat(dlParams.wh.value) == 1.0) ) {
625: alert("This function is only available when zoomed in!");
626: return;
627: }
628:
629: function moveToEvent(event) {
630:
631: var point = new Point(event);
632:
633: dlParams.wx.value = cropFloat(point.relX-0.5*dlParams.ww.value);
634: dlParams.wy.value = cropFloat(point.relY-0.5*dlParams.wh.value);
635:
636: if ( dlParams.wx.value < 0 ) {
637: dlParams.wx.value = 0;
638: }
639: if ( dlParams.wy.value < 0 ) {
640: dlParams.wy.value = 0;
641: }
642: if ( dlParams.wx.value + dlParams.ww.value > 1 ) {
643: dlParams.wx.value = 1 - dlParams.ww.value;
644: }
645: if ( dlParams.wy.value + dlParams.wh.value > 1 ) {
646: dlParams.wy.value = 1 - dlParams.wh.value;
647: }
648:
649: // stopping event capture
650: if ( document.all ) {
651: document.all.scaler.onmousedown = null;
652: } else if ( typeof(document.removeEventListener) == "function" ) {
653: document.getElementById("scaler").removeEventListener("mousedown", moveToEvent, true);
654: } else {
655: document.scaler.releaseEvents(Event.MOUSEDOWN)
656: }
657:
658: display(3);
659: }
660:
661: // starting event capture
662: if ( document.all ) {
663: document.all.scaler.onmousedown = moveToEvent;
664: } else if ( typeof(document.addEventListener) == "function" ) {
665: document.getElementById("scaler").addEventListener("mousedown", moveToEvent, true);
666: } else {
667: document.scaler.captureEvents(Event.MOUSEDOWN);
668: document.scaler.onmousedown = moveToEvent;
669: }
670: }
671:
672:
673: function scale(factor) {
674:
675: dlParams.ws.value = cropFloat(factor);
676: display(3);
677:
678: }
679:
680:
681: // capturing keypresses for next and previous page
682: function parseKeypress(evt) {
683:
684: if ( document.all ) {
685:
686: if ( event.keyCode == 110 ) {
687: page('+1');
688: }
689: if ( event.keyCode == 98 ) {
690: page('-1');
691: }
692:
693: document.cancleBubble = true;
694:
695: } else {
696:
697: if ( evt.charCode == 110 ) {
698: page('+1');
699: } else if ( evt.charCode == 98 ) {
700: page('-1');
701: } else if ( evt.which == 110 ) {
702: page('+1');
703: } else if ( evt.which == 98 ) {
704: // does not work currentlyfor Opera, because it catches the 'b'-key on it's own
705: // have to change the key or find another way - luginbuehl
706: page('-1');
707: }
708:
709: }
710: }
711:
712:
713: // auxiliary function to crop senseless precicsion
714: function cropFloat(tmp) {
715: return parseInt(10000*tmp)/10000;
716: }
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