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.domelement());
77 this.ondisplay = this.prevdisplay.clone().
78 injectInside(this.container.domelement());
79 this.loadingdiv = new Element('div').
80 addClass('loading').setStyles({
86 width: this.coords.width,
87 height: this.coords.height,
88 }).injectInside(this.container.domelement());
90 window.addEvent('resize', this.resizer.bind(this))
93 /* event handler for window resize */
97 var newstyle = this.calcsize(this.cache.curr);
98 this.ondisplay.setStyles(newstyle);
99 /* check if we need reload */
102 /* prev, play, stop, next, exit, comm are methods for button presses */
107 if (this.currentid > 0) {
108 this.show(this.currentid-1);
110 /* alert('show.prev called beyond first element'); */
116 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(); }
134 if (this.currentid < this.vimgs.length-1) {
135 this.show(this.currentid+1);
137 /* alert('show.next called beyond last element'); */
144 this.prevdisplay.setStyle('display', 'none');
145 this.ondisplay.setStyle('display', 'none');
146 document.location.href = this.baseurl;
147 this.options.cbExit();
151 /* alert('show.comm called, do nothing'); */
154 /* Entry point: called to start doing things */
156 start: function(id, play){
157 this.options.cbStart();
158 this.isplaying = play;
159 this.controls.running(this.isplaying);
162 return false; /* to make it usable from href links */
165 /* "Private" methods to do the real job */
168 /* alert('called show.show('+id+')'); */
171 prev: (id > 0)?this.prepare(id-1):{},
172 curr: this.prepare(id),
173 next: (id < (this.vimgs.length-1))?this.prepare(id+1):{},
176 this.cache = newcache;
177 if (this.cache.curr.ready) {
178 this.display(this.cache.curr);
180 this.pendingload = true;
183 document.location.href = this.baseurl+'#'+this.vimgs[id][0];
184 this.controls.info(id,this.vimgs.length,
185 '#'+this.vimgs[id][0],
189 prepare: function(id){
191 for (vi=0;vi<this.vimgs[id][2].length-1;vi++) {
192 if ((this.vimgs[id][2][vi][0] >= this.target.width) ||
193 (this.vimgs[id][2][vi][1] >= this.target.height)) {
197 /* alert('prepare id='+id+', selected '+vi+' at '+
198 this.vimgs[id][2][vi][0]+'x'+
199 this.vimgs[id][2][vi][1]); */
201 ['prev', 'curr', 'next'].each(function(el){
202 if (this.cache[el] &&
203 this.cache[el].id == id &&
204 this.cache[el].vi == vi) {
205 cachel = this.cache[el];
213 url: this.vimgs[id][2][vi][2],
215 cachel.img = this.bgload(cachel);
220 bgload: function(cachel){
221 /* alert('bgload: id='+cachel.id+' vi='+cachel.vi+
222 ' url='+cachel.url); */
223 return new Asset.image(this.vimgs[cachel.id][2][cachel.vi][2],{
224 id: this.vimgs[cachel.id][0],
225 title: this.vimgs[cachel.id][1],
226 onload: this.loadcomplete.bind(this,[cachel]),
230 loadcomplete: function(cachel){
231 /* alert('loadcomplete '+cachel.url+' id='+cachel.id+
232 ' vi='+cachel.vi); */
234 if (cachel.id == this.currentid &&
236 this.pendingload = false;
238 this.display(cachel);
242 display: function(cachel){
243 var newimg = cachel.img.clone().
244 set('class', 'mainformat').
245 setProperty('alt', 'Current Image').
246 setStyles(this.calcsize(cachel)).
251 this.ondisplay.replaces(this.prevdisplay).
252 setProperty('alt', 'Previous Image').
253 setStyle('zIndex', 2);
254 this.prevdisplay = this.ondisplay;
255 this.ondisplay = newimg.
256 injectInside(this.container.domelement());
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);