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'); },
49 initialize: function(vimgs, container, controls, options){
50 this.setOptions(this.getOptions(), options);
52 this.container = container;
53 this.controls = controls;
54 this.controls.registershow(this);
56 this.delay = this.options.delay;
64 this.ondisplay = new Element('img').
65 injectInside(this.container.container);
66 this.loadingdiv = new Element('div').
67 addClass('loading').setStyles({
73 width: this.coords.width,
74 height: this.coords.height,
75 }).injectInside(this.container.container);
77 window.addEvent('resize', this.resizer.bind(this))
80 /* event handler for window resize */
84 var newstyle = this.calcsize(this.cache.curr);
85 this.ondisplay.setStyles(newstyle);
86 /* check if we need reload */
89 /* prev, play, stop, next, exit, comm are methods for button presses */
92 if (this.currentid > 0) {
93 this.show(this.currentid-1);
95 alert('show.prev called beyond first element');
100 if (this.isplaying) { $clear(this.timer); }
101 this.isplaying = false;
103 this.controls.running(0);
107 this.isplaying = true;
108 this.timer = this.autonext.delay(this.delay,this);
109 this.controls.running(1);
113 if (this.currentid < this.vimgs.length-1) {
114 this.show(this.currentid+1);
116 alert('show.next called beyond last element');
121 if (this.isplaying) { $clear(this.timer); }
123 this.options.cbExit();
127 /* alert('show.comm called, do nothing'); */
130 /* Entry point: called to start doing things */
132 start: function(id, play){
133 this.options.cbStart();
134 this.isplaying = play;
135 this.controls.running(this.isplaying);
137 return false; /* to make it usable from href links */
140 /* "Private" methods to do the real job */
143 /* alert('called show.show('+id+')'); */
144 this.previd = this.currentid;
147 prev: (id > 0)?this.prepare(id-1):{},
148 curr: this.prepare(id),
149 next: (id < (this.vimgs.length-1))?this.prepare(id+1):{},
152 this.cache = newcache;
153 if (this.cache.curr.ready) {
154 this.display(this.cache.curr);
156 this.pendingload = true;
159 this.controls.info(id,this.vimgs.length,
164 prepare: function(id){
166 for (vi=0;vi<this.vimgs[id][2].length-1;vi++) {
167 if ((this.vimgs[id][2][vi][0] >= this.target.width) ||
168 (this.vimgs[id][2][vi][1] >= this.target.height)) {
172 /* alert('prepare id='+id+', selected '+vi+' at '+
173 this.vimgs[id][2][vi][0]+'x'+
174 this.vimgs[id][2][vi][1]); */
176 ['prev', 'curr', 'next'].each(function(el){
177 if (this.cache[el] &&
178 this.cache[el].id == id &&
179 this.cache[el].vi == vi) {
180 cachel = this.cache[el];
188 url: this.vimgs[id][2][vi][2],
190 cachel.img = this.bgload(cachel);
195 bgload: function(cachel){
196 /* alert('bgload: id='+cachel.id+' vi='+cachel.vi+
197 ' url='+cachel.url); */
198 return new Asset.image(this.vimgs[cachel.id][2][cachel.vi][2],{
199 id: this.vimgs[cachel.id][0],
200 title: this.vimgs[cachel.id][1],
201 onload: this.loadcomplete.bind(this,[cachel]),
205 loadcomplete: function(cachel){
206 /* alert('loadcomplete '+cachel.url+' id='+cachel.id+
207 ' vi='+cachel.vi); */
209 if (cachel.id == this.currentid &&
211 this.pendingload = false;
213 this.display(cachel);
217 display: function(cachel){
218 var newstyle = this.calcsize(cachel);
219 var newimg = cachel.img.clone();
220 newimg.setStyles(newstyle);
221 newimg.replaces(this.ondisplay);
222 this.ondisplay = newimg;
223 if (this.isplaying) {
224 this.timer = this.autonext.delay(this.delay,this);
228 autonext: function(){
229 if (this.isplaying) {
230 if (this.currentid < this.vimgs.length-1) {
231 this.show(this.currentid+1);
238 calcsize: function(cachel){
241 candidate = this.target.width /
242 this.vimgs[cachel.id][2][cachel.vi][0];
243 if (factor > candidate) { factor = candidate; }
244 candidate = this.target.height /
245 this.vimgs[cachel.id][2][cachel.vi][1];
246 if (factor > candidate) { factor = candidate; }
247 var w = Math.round(this.vimgs[cachel.id][2][cachel.vi][0] *
249 var h = Math.round(this.vimgs[cachel.id][2][cachel.vi][1] *
251 var t = Math.round((this.coords.height-h)/2);
252 var l = Math.round((this.coords.width-w)/2);
253 /* alert('new size: '+w+'x'+h+'+'+l+'+'+t); */
255 position: 'absolute',
263 showloading: function(){
264 this.loadingdiv.setStyle('display', 'block');
267 hideloading: function(){
268 this.loadingdiv.setStyle('display', 'none');
274 updatecoords: function(){
275 this.coords = this.container.getCoordinates();
277 width: Math.round(this.coords.width *
278 this.options.percentage / 100),
279 height: Math.round(this.coords.height *
280 this.options.percentage / 100),
282 /* alert('coords: '+this.coords.width+'x'+this.coords.height+
283 ', target: '+this.target.width+'x'+this.target.height); */
287 Show.implement(new Options);
288 Show.implement(new Events);