4 This is a part of mkgallery.pl suite
5 http://www.average.org/mkgallery/
7 Uses mootools (1.2) http://www.mootools.net/
8 Inspired by slideshow http://www.phatfusion.net/slideshow/
14 - On show image: find this and next urls; put in place
15 those that are already here; free unneeded; initiate download of
16 the rest; if needed image is ready then initiate "transitioning", else
18 - On load complete: if this is the target image, initiate "transitioning".
19 - On "loading": show "loading" image
20 - On "transitioning": hide "loading" image; initiate FX animation to the
22 - On animation complete: blank previous image; if "playing" then schedule
23 autoswitch to next image in the future.
24 - On autoswitch to next image: if "playing" then switch to next image.
25 - On switch to next image: if next exists, show next image, else show
27 - On switch to prev image: if prev exists, show prev image, else show
28 "first image" message.
29 - On "play": make "playing"; switch to next image.
30 - On "stop": if "playing" cancel autoswitch; break "playing".
31 - On "start show": set up things; set "playing" state; show needed image.
32 - On "stop show": cancel any schedules, hide things.
33 - On resize: recalculate existing image size and position; determine
34 what image is needed; if it is not the one on display then request
35 "show image" for the new image.
38 var Show = new Class({
40 getOptions: function(){
42 cbStart: function(){ alert('show start undefined'); },
43 cbExit: function(){ alert('show exit undefined'); },
50 initialize: function(vimgs, container, controls, options){
51 this.setOptions(this.getOptions(), options);
53 this.container = container;
54 this.controls = controls;
55 this.controls.registershow(this);
57 this.delay = this.options.delay;
64 * thescripts.com/forum/thread170365.html
66 var hashpos = document.URL.search(/#/);
68 this.baseurl = document.URL.slice(0,hashpos);
70 this.baseurl = document.URL
74 this.prevdisplay = new Element('img').
75 set('class', 'mainformat').
76 setProperty('alt', 'Current Image').
77 setStyle('opacity', 0).
78 injectInside(this.container.domelement());
79 this.ondisplay = this.prevdisplay.clone().
80 injectInside(this.container.domelement());
81 this.loadingdiv = new Element('div').
82 addClass('loading').setStyles({
88 width: this.coords.width,
89 height: this.coords.height,
90 }).injectInside(this.container.domelement());
92 window.addEvent('resize', this.resizer.bind(this))
95 /* event handler for window resize */
99 var newstyle = this.calcsize(this.cache.curr);
100 this.ondisplay.setStyles(newstyle);
101 /* check if we need reload */
104 /* prev, play, stop, next, exit, comm are methods for button presses */
109 if (this.currentid > 0) {
110 this.show(this.currentid-1);
112 /* alert('show.prev called beyond first element'); */
118 this.isplaying = false;
119 this.controls.running(0);
123 this.isplaying = true;
124 this.timer = this.autonext.delay(this.delay,this);
125 this.controls.running(1);
128 toggleplay: function(){
129 if (this.isplaying) { this.stop(); }
130 else { this.play(); }
136 if (this.currentid < this.vimgs.length-1) {
137 this.show(this.currentid+1);
139 /* alert('show.next called beyond last element'); */
146 this.prevdisplay.setStyle('display', 'none');
147 this.ondisplay.setStyle('display', 'none');
148 document.location.href = this.baseurl;
149 this.options.cbExit();
153 /* alert('show.comm called, do nothing'); */
156 /* Entry point: called to start doing things */
158 start: function(id, play){
159 this.options.cbStart();
160 this.isplaying = play;
161 this.controls.running(this.isplaying);
164 return false; /* to make it usable from href links */
167 /* "Private" methods to do the real job */
170 /* alert('called show.show('+id+')'); */
173 prev: (id > 0)?this.prepare(id-1):{},
174 curr: this.prepare(id),
175 next: (id < (this.vimgs.length-1))?this.prepare(id+1):{},
178 this.cache = newcache;
179 if (this.cache.curr.ready) {
180 this.display(this.cache.curr);
182 this.pendingload = true;
185 document.location.href = this.baseurl+'#'+this.vimgs[id][0];
186 this.controls.info(id,this.vimgs.length,
187 '#'+this.vimgs[id][0],
191 prepare: function(id){
193 for (vi=0;vi<this.vimgs[id][2].length-1;vi++) {
194 if ((this.vimgs[id][2][vi][0] >= this.target.width) ||
195 (this.vimgs[id][2][vi][1] >= this.target.height)) {
199 /* alert('prepare id='+id+', selected '+vi+' at '+
200 this.vimgs[id][2][vi][0]+'x'+
201 this.vimgs[id][2][vi][1]); */
203 ['prev', 'curr', 'next'].each(function(el){
204 if (this.cache[el] &&
205 this.cache[el].id == id &&
206 this.cache[el].vi == vi) {
207 cachel = this.cache[el];
215 url: this.vimgs[id][2][vi][2],
217 cachel.img = this.bgload(cachel);
222 bgload: function(cachel){
223 /* alert('bgload: id='+cachel.id+' vi='+cachel.vi+
224 ' url='+cachel.url); */
225 return new Asset.image(this.vimgs[cachel.id][2][cachel.vi][2],{
226 id: this.vimgs[cachel.id][0],
227 title: this.vimgs[cachel.id][1],
228 onload: this.loadcomplete.bind(this,[cachel]),
232 loadcomplete: function(cachel){
233 /* alert('loadcomplete '+cachel.url+' id='+cachel.id+
234 ' vi='+cachel.vi); */
236 if (cachel.id == this.currentid &&
238 this.pendingload = false;
240 this.display(cachel);
244 display: function(cachel){
245 var newstyle = this.calcsize(cachel);
246 var newimg = cachel.img.clone();
247 newimg.setStyles(newstyle);
252 this.prevdisplay.dispose();
253 this.prevdisplay = this.ondisplay.clone().
254 setStyle('zIndex', 2).injectInside(this.container.domelement());
255 newimg.replaces(this.ondisplay);
256 this.ondisplay = newimg;
261 this.fx = new Fx.Tween(this.ondisplay, {
262 duration: this.options.fxduration,
264 this.fx.addEvent('complete',this.displaycomplete.bind(this));
265 this.fx.start('opacity', 0, 1);
268 displaycomplete: function(){
269 this.prevdisplay.setStyle('display', 'none');
270 if (this.isplaying) {
271 this.timer = this.autonext.delay(this.delay,this);
275 autonext: function(){
276 if (this.isplaying) {
277 if (this.currentid < this.vimgs.length-1) {
278 this.show(this.currentid+1);
285 calcsize: function(cachel){
288 candidate = this.target.width /
289 this.vimgs[cachel.id][2][cachel.vi][0];
290 if (factor > candidate) { factor = candidate; }
291 candidate = this.target.height /
292 this.vimgs[cachel.id][2][cachel.vi][1];
293 if (factor > candidate) { factor = candidate; }
294 var w = Math.round(this.vimgs[cachel.id][2][cachel.vi][0] *
296 var h = Math.round(this.vimgs[cachel.id][2][cachel.vi][1] *
298 var t = Math.round((this.coords.height-h)/2);
299 var l = Math.round((this.coords.width-w)/2);
300 /* alert('new size: '+w+'x'+h+'+'+l+'+'+t); */
302 position: 'absolute',
310 showloading: function(){
311 this.loadingdiv.setStyle('display', 'block');
314 hideloading: function(){
315 this.loadingdiv.setStyle('display', 'none');
318 cleartimer: function(){
319 if (this.isplaying) { $clear(this.timer); }
323 if (this.fx) this.fx.cancel();
326 updatecoords: function(){
327 this.coords = this.container.getCoordinates();
329 width: Math.round(this.coords.width *
330 this.options.percentage / 100),
331 height: Math.round(this.coords.height *
332 this.options.percentage / 100),
334 /* alert('coords: '+this.coords.width+'x'+this.coords.height+
335 ', target: '+this.target.width+'x'+this.target.height); */
339 Show.implement(new Options);
340 Show.implement(new Events);