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 this.prevdisplay = new Element('img').
65 setStyle('opacity', 0).
66 injectInside(this.container.container);
67 this.ondisplay = new Element('img').
68 setStyle('opacity', 0).
69 injectInside(this.container.container);
70 this.loadingdiv = new Element('div').
71 addClass('loading').setStyles({
77 width: this.coords.width,
78 height: this.coords.height,
79 }).injectInside(this.container.container);
81 window.addEvent('resize', this.resizer.bind(this))
84 /* event handler for window resize */
88 var newstyle = this.calcsize(this.cache.curr);
89 this.ondisplay.setStyles(newstyle);
90 /* check if we need reload */
93 /* prev, play, stop, next, exit, comm are methods for button presses */
96 if (this.currentid > 0) {
97 this.show(this.currentid-1);
99 /* alert('show.prev called beyond first element'); */
104 if (this.isplaying) { $clear(this.timer); }
105 this.isplaying = false;
107 this.controls.running(0);
111 this.isplaying = true;
112 this.timer = this.autonext.delay(this.delay,this);
113 this.controls.running(1);
116 toggleplay: function(){
117 if (this.isplaying) { this.stop(); }
118 else { this.play(); }
122 if (this.currentid < this.vimgs.length-1) {
123 this.show(this.currentid+1);
125 /* alert('show.next called beyond last element'); */
130 if (this.isplaying) { $clear(this.timer); }
131 this.prevdisplay.setStyle('display', 'none');
132 this.ondisplay.setStyle('display', 'none');
134 this.options.cbExit();
138 /* alert('show.comm called, do nothing'); */
141 /* Entry point: called to start doing things */
143 start: function(id, play){
144 this.options.cbStart();
145 this.isplaying = play;
146 this.controls.running(this.isplaying);
149 return false; /* to make it usable from href links */
152 /* "Private" methods to do the real job */
155 /* alert('called show.show('+id+')'); */
158 prev: (id > 0)?this.prepare(id-1):{},
159 curr: this.prepare(id),
160 next: (id < (this.vimgs.length-1))?this.prepare(id+1):{},
163 this.cache = newcache;
164 if (this.cache.curr.ready) {
165 this.display(this.cache.curr);
167 this.pendingload = true;
170 this.controls.info(id,this.vimgs.length,
175 prepare: function(id){
177 for (vi=0;vi<this.vimgs[id][2].length-1;vi++) {
178 if ((this.vimgs[id][2][vi][0] >= this.target.width) ||
179 (this.vimgs[id][2][vi][1] >= this.target.height)) {
183 /* alert('prepare id='+id+', selected '+vi+' at '+
184 this.vimgs[id][2][vi][0]+'x'+
185 this.vimgs[id][2][vi][1]); */
187 ['prev', 'curr', 'next'].each(function(el){
188 if (this.cache[el] &&
189 this.cache[el].id == id &&
190 this.cache[el].vi == vi) {
191 cachel = this.cache[el];
199 url: this.vimgs[id][2][vi][2],
201 cachel.img = this.bgload(cachel);
206 bgload: function(cachel){
207 /* alert('bgload: id='+cachel.id+' vi='+cachel.vi+
208 ' url='+cachel.url); */
209 return new Asset.image(this.vimgs[cachel.id][2][cachel.vi][2],{
210 id: this.vimgs[cachel.id][0],
211 title: this.vimgs[cachel.id][1],
212 onload: this.loadcomplete.bind(this,[cachel]),
216 loadcomplete: function(cachel){
217 /* alert('loadcomplete '+cachel.url+' id='+cachel.id+
218 ' vi='+cachel.vi); */
220 if (cachel.id == this.currentid &&
222 this.pendingload = false;
224 this.display(cachel);
228 display: function(cachel){
229 var newstyle = this.calcsize(cachel);
230 var newimg = cachel.img.clone();
231 newimg.setStyles(newstyle);
236 this.prevdisplay.dispose();
237 this.prevdisplay = this.ondisplay.clone().
238 setStyle('zIndex', 2).injectInside(this.container.container);
239 newimg.replaces(this.ondisplay);
240 this.ondisplay = newimg;
245 this.fx = new Fx.Tween(this.ondisplay, {
246 duration: this.options.fxduration,
248 this.fx.addEvent('complete',this.displaycomplete.bind(this));
249 this.fx.start('opacity', 0, 1);
252 displaycomplete: function(){
253 this.prevdisplay.setStyle('display', 'none');
254 if (this.isplaying) {
255 this.timer = this.autonext.delay(this.delay,this);
259 autonext: function(){
260 if (this.isplaying) {
261 if (this.currentid < this.vimgs.length-1) {
262 this.show(this.currentid+1);
269 calcsize: function(cachel){
272 candidate = this.target.width /
273 this.vimgs[cachel.id][2][cachel.vi][0];
274 if (factor > candidate) { factor = candidate; }
275 candidate = this.target.height /
276 this.vimgs[cachel.id][2][cachel.vi][1];
277 if (factor > candidate) { factor = candidate; }
278 var w = Math.round(this.vimgs[cachel.id][2][cachel.vi][0] *
280 var h = Math.round(this.vimgs[cachel.id][2][cachel.vi][1] *
282 var t = Math.round((this.coords.height-h)/2);
283 var l = Math.round((this.coords.width-w)/2);
284 /* alert('new size: '+w+'x'+h+'+'+l+'+'+t); */
286 position: 'absolute',
294 showloading: function(){
295 this.loadingdiv.setStyle('display', 'block');
298 hideloading: function(){
299 this.loadingdiv.setStyle('display', 'none');
303 if (this.fx) this.fx.cancel();
306 updatecoords: function(){
307 this.coords = this.container.getCoordinates();
309 width: Math.round(this.coords.width *
310 this.options.percentage / 100),
311 height: Math.round(this.coords.height *
312 this.options.percentage / 100),
314 /* alert('coords: '+this.coords.width+'x'+this.coords.height+
315 ', target: '+this.target.width+'x'+this.target.height); */
319 Show.implement(new Options);
320 Show.implement(new Events);