1 // script.aculo.us slider.js v1.8.0_pre1, Fri Oct 12 21:34:51 +0200 2007
3 // Copyright (c) 2005-2007 Marty Haught, Thomas Fuchs
5 // script.aculo.us is freely distributable under the terms of an MIT-style license.
6 // For details, see the script.aculo.us web site: http://script.aculo.us/
8 if (!Control) var Control = { };
9 Control.Slider = Class.create();
12 // axis: 'vertical', or 'horizontal' (default)
17 Control.Slider.prototype = {
18 initialize: function(handle, track, options) {
21 if (Object.isArray(handle)) {
22 this.handles = handle.collect( function(e) { return $(e) });
24 this.handles = [$(handle)];
27 this.track = $(track);
28 this.options = options || { };
30 this.axis = this.options.axis || 'horizontal';
31 this.increment = this.options.increment || 1;
32 this.step = parseInt(this.options.step || '1');
33 this.range = this.options.range || $R(0,1);
35 this.value = 0; // assure backwards compat
36 this.values = this.handles.map( function() { return 0 });
37 this.spans = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
38 this.options.startSpan = $(this.options.startSpan || null);
39 this.options.endSpan = $(this.options.endSpan || null);
41 this.restricted = this.options.restricted || false;
43 this.maximum = this.options.maximum || this.range.end;
44 this.minimum = this.options.minimum || this.range.start;
46 // Will be used to align the handle onto the track, if necessary
47 this.alignX = parseInt(this.options.alignX || '0');
48 this.alignY = parseInt(this.options.alignY || '0');
50 this.trackLength = this.maximumOffset() - this.minimumOffset();
52 this.handleLength = this.isVertical() ?
53 (this.handles[0].offsetHeight != 0 ?
54 this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) :
55 (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth :
56 this.handles[0].style.width.replace(/px$/,""));
59 this.dragging = false;
60 this.disabled = false;
62 if (this.options.disabled) this.setDisabled();
64 // Allowed values array
65 this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
66 if (this.allowedValues) {
67 this.minimum = this.allowedValues.min();
68 this.maximum = this.allowedValues.max();
71 this.eventMouseDown = this.startDrag.bindAsEventListener(this);
72 this.eventMouseUp = this.endDrag.bindAsEventListener(this);
73 this.eventMouseMove = this.update.bindAsEventListener(this);
75 // Initialize handles in reverse (make sure first handle is active)
76 this.handles.each( function(h,i) {
77 i = slider.handles.length-1-i;
78 slider.setValue(parseFloat(
79 (Object.isArray(slider.options.sliderValue) ?
80 slider.options.sliderValue[i] : slider.options.sliderValue) ||
81 slider.range.start), i);
82 h.makePositioned().observe("mousedown", slider.eventMouseDown);
85 this.track.observe("mousedown", this.eventMouseDown);
86 document.observe("mouseup", this.eventMouseUp);
87 document.observe("mousemove", this.eventMouseMove);
89 this.initialized = true;
93 Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
94 Event.stopObserving(document, "mouseup", this.eventMouseUp);
95 Event.stopObserving(document, "mousemove", this.eventMouseMove);
96 this.handles.each( function(h) {
97 Event.stopObserving(h, "mousedown", slider.eventMouseDown);
100 setDisabled: function(){
101 this.disabled = true;
103 setEnabled: function(){
104 this.disabled = false;
106 getNearestValue: function(value){
107 if (this.allowedValues){
108 if (value >= this.allowedValues.max()) return(this.allowedValues.max());
109 if (value <= this.allowedValues.min()) return(this.allowedValues.min());
111 var offset = Math.abs(this.allowedValues[0] - value);
112 var newValue = this.allowedValues[0];
113 this.allowedValues.each( function(v) {
114 var currentOffset = Math.abs(v - value);
115 if (currentOffset <= offset){
117 offset = currentOffset;
122 if (value > this.range.end) return this.range.end;
123 if (value < this.range.start) return this.range.start;
126 setValue: function(sliderValue, handleIdx){
128 this.activeHandleIdx = handleIdx || 0;
129 this.activeHandle = this.handles[this.activeHandleIdx];
132 handleIdx = handleIdx || this.activeHandleIdx || 0;
133 if (this.initialized && this.restricted) {
134 if ((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
135 sliderValue = this.values[handleIdx-1];
136 if ((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
137 sliderValue = this.values[handleIdx+1];
139 sliderValue = this.getNearestValue(sliderValue);
140 this.values[handleIdx] = sliderValue;
141 this.value = this.values[0]; // assure backwards compat
143 this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] =
144 this.translateToPx(sliderValue);
147 if (!this.dragging || !this.event) this.updateFinished();
149 setValueBy: function(delta, handleIdx) {
150 this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta,
151 handleIdx || this.activeHandleIdx || 0);
153 translateToPx: function(value) {
155 ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) *
156 (value - this.range.start)) + "px";
158 translateToValue: function(offset) {
159 return ((offset/(this.trackLength-this.handleLength) *
160 (this.range.end-this.range.start)) + this.range.start);
162 getRange: function(range) {
163 var v = this.values.sortBy(Prototype.K);
165 return $R(v[range],v[range+1]);
167 minimumOffset: function(){
168 return(this.isVertical() ? this.alignY : this.alignX);
170 maximumOffset: function(){
171 return(this.isVertical() ?
172 (this.track.offsetHeight != 0 ? this.track.offsetHeight :
173 this.track.style.height.replace(/px$/,"")) - this.alignY :
174 (this.track.offsetWidth != 0 ? this.track.offsetWidth :
175 this.track.style.width.replace(/px$/,"")) - this.alignY);
177 isVertical: function(){
178 return (this.axis == 'vertical');
180 drawSpans: function() {
183 $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
184 if (this.options.startSpan)
185 this.setSpan(this.options.startSpan,
186 $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
187 if (this.options.endSpan)
188 this.setSpan(this.options.endSpan,
189 $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
191 setSpan: function(span, range) {
192 if (this.isVertical()) {
193 span.style.top = this.translateToPx(range.start);
194 span.style.height = this.translateToPx(range.end - range.start + this.range.start);
196 span.style.left = this.translateToPx(range.start);
197 span.style.width = this.translateToPx(range.end - range.start + this.range.start);
200 updateStyles: function() {
201 this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
202 Element.addClassName(this.activeHandle, 'selected');
204 startDrag: function(event) {
205 if (Event.isLeftClick(event)) {
209 var handle = Event.element(event);
210 var pointer = [Event.pointerX(event), Event.pointerY(event)];
212 if (track==this.track) {
213 var offsets = Position.cumulativeOffset(this.track);
215 this.setValue(this.translateToValue(
216 (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)
218 var offsets = Position.cumulativeOffset(this.activeHandle);
219 this.offsetX = (pointer[0] - offsets[0]);
220 this.offsetY = (pointer[1] - offsets[1]);
222 // find the handle (prevents issues with Safari)
223 while((this.handles.indexOf(handle) == -1) && handle.parentNode)
224 handle = handle.parentNode;
226 if (this.handles.indexOf(handle)!=-1) {
227 this.activeHandle = handle;
228 this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
231 var offsets = Position.cumulativeOffset(this.activeHandle);
232 this.offsetX = (pointer[0] - offsets[0]);
233 this.offsetY = (pointer[1] - offsets[1]);
240 update: function(event) {
242 if (!this.dragging) this.dragging = true;
244 if (Prototype.Browser.WebKit) window.scrollBy(0,0);
248 draw: function(event) {
249 var pointer = [Event.pointerX(event), Event.pointerY(event)];
250 var offsets = Position.cumulativeOffset(this.track);
251 pointer[0] -= this.offsetX + offsets[0];
252 pointer[1] -= this.offsetY + offsets[1];
254 this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
255 if (this.initialized && this.options.onSlide)
256 this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
258 endDrag: function(event) {
259 if (this.active && this.dragging) {
260 this.finishDrag(event, true);
264 this.dragging = false;
266 finishDrag: function(event, success) {
268 this.dragging = false;
269 this.updateFinished();
271 updateFinished: function() {
272 if (this.initialized && this.options.onChange)
273 this.options.onChange(this.values.length>1 ? this.values : this.value, this);