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 setStyle('opacity', 0).
76 injectInside(this.container.container);
77 this.ondisplay = new Element('img').
78 setStyle('opacity', 0).
79 injectInside(this.container.container);
80 this.loadingdiv = new Element('div').
81 addClass('loading').setStyles({
87 width: this.coords.width,
88 height: this.coords.height,
89 }).injectInside(this.container.container);
91 window.addEvent('resize', this.resizer.bind(this))
94 /* event handler for window resize */
98 var newstyle = this.calcsize(this.cache.curr);
99 this.ondisplay.setStyles(newstyle);
100 /* check if we need reload */
103 /* prev, play, stop, next, exit, comm are methods for button presses */
106 if (this.currentid > 0) {
107 this.show(this.currentid-1);
109 /* alert('show.prev called beyond first element'); */
114 if (this.isplaying) { $clear(this.timer); }
115 this.isplaying = false;
117 this.controls.running(0);
121 this.isplaying = true;
122 this.timer = this.autonext.delay(this.delay,this);
123 this.controls.running(1);
126 toggleplay: function(){
127 if (this.isplaying) { this.stop(); }
128 else { this.play(); }
132 if (this.currentid < this.vimgs.length-1) {
133 this.show(this.currentid+1);
135 /* alert('show.next called beyond last element'); */
140 if (this.isplaying) { $clear(this.timer); }
141 this.prevdisplay.setStyle('display', 'none');
142 this.ondisplay.setStyle('display', 'none');
144 this.options.cbExit();
145 document.location.href = this.baseurl;
149 /* alert('show.comm called, do nothing'); */
152 /* Entry point: called to start doing things */
154 start: function(id, play){
155 this.options.cbStart();
156 this.isplaying = play;
157 this.controls.running(this.isplaying);
160 return false; /* to make it usable from href links */
163 /* "Private" methods to do the real job */
166 /* alert('called show.show('+id+')'); */
169 prev: (id > 0)?this.prepare(id-1):{},
170 curr: this.prepare(id),
171 next: (id < (this.vimgs.length-1))?this.prepare(id+1):{},
174 this.cache = newcache;
175 if (this.cache.curr.ready) {
176 this.display(this.cache.curr);
178 this.pendingload = true;
181 document.location.href = this.baseurl+'#'+this.vimgs[id][0];
182 this.controls.info(id,this.vimgs.length,
183 '#'+this.vimgs[id][0],
187 prepare: function(id){
189 for (vi=0;vi<this.vimgs[id][2].length-1;vi++) {
190 if ((this.vimgs[id][2][vi][0] >= this.target.width) ||
191 (this.vimgs[id][2][vi][1] >= this.target.height)) {
195 /* alert('prepare id='+id+', selected '+vi+' at '+
196 this.vimgs[id][2][vi][0]+'x'+
197 this.vimgs[id][2][vi][1]); */
199 ['prev', 'curr', 'next'].each(function(el){
200 if (this.cache[el] &&
201 this.cache[el].id == id &&
202 this.cache[el].vi == vi) {
203 cachel = this.cache[el];
211 url: this.vimgs[id][2][vi][2],
213 cachel.img = this.bgload(cachel);
218 bgload: function(cachel){
219 /* alert('bgload: id='+cachel.id+' vi='+cachel.vi+
220 ' url='+cachel.url); */
221 return new Asset.image(this.vimgs[cachel.id][2][cachel.vi][2],{
222 id: this.vimgs[cachel.id][0],
223 title: this.vimgs[cachel.id][1],
224 onload: this.loadcomplete.bind(this,[cachel]),
228 loadcomplete: function(cachel){
229 /* alert('loadcomplete '+cachel.url+' id='+cachel.id+
230 ' vi='+cachel.vi); */
232 if (cachel.id == this.currentid &&
234 this.pendingload = false;
236 this.display(cachel);
240 display: function(cachel){
241 var newstyle = this.calcsize(cachel);
242 var newimg = cachel.img.clone();
243 newimg.setStyles(newstyle);
248 this.prevdisplay.dispose();
249 this.prevdisplay = this.ondisplay.clone().
250 setStyle('zIndex', 2).injectInside(this.container.container);
251 newimg.replaces(this.ondisplay);
252 this.ondisplay = newimg;
257 this.fx = new Fx.Tween(this.ondisplay, {
258 duration: this.options.fxduration,
260 this.fx.addEvent('complete',this.displaycomplete.bind(this));
261 this.fx.start('opacity', 0, 1);
264 displaycomplete: function(){
265 this.prevdisplay.setStyle('display', 'none');
266 if (this.isplaying) {
267 this.timer = this.autonext.delay(this.delay,this);
271 autonext: function(){
272 if (this.isplaying) {
273 if (this.currentid < this.vimgs.length-1) {
274 this.show(this.currentid+1);
281 calcsize: function(cachel){
284 candidate = this.target.width /
285 this.vimgs[cachel.id][2][cachel.vi][0];
286 if (factor > candidate) { factor = candidate; }
287 candidate = this.target.height /
288 this.vimgs[cachel.id][2][cachel.vi][1];
289 if (factor > candidate) { factor = candidate; }
290 var w = Math.round(this.vimgs[cachel.id][2][cachel.vi][0] *
292 var h = Math.round(this.vimgs[cachel.id][2][cachel.vi][1] *
294 var t = Math.round((this.coords.height-h)/2);
295 var l = Math.round((this.coords.width-w)/2);
296 /* alert('new size: '+w+'x'+h+'+'+l+'+'+t); */
298 position: 'absolute',
306 showloading: function(){
307 this.loadingdiv.setStyle('display', 'block');
310 hideloading: function(){
311 this.loadingdiv.setStyle('display', 'none');
315 if (this.fx) this.fx.cancel();
318 updatecoords: function(){
319 this.coords = this.container.getCoordinates();
321 width: Math.round(this.coords.width *
322 this.options.percentage / 100),
323 height: Math.round(this.coords.height *
324 this.options.percentage / 100),
326 /* alert('coords: '+this.coords.width+'x'+this.coords.height+
327 ', target: '+this.target.width+'x'+this.target.height); */
331 Show.implement(new Options);
332 Show.implement(new Events);