1 // script.aculo.us slider.js v1.6.4, Wed Sep 06 11:30:58 CEST 2006
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3 // Copyright (c) 2005 Marty Haught, Thomas Fuchs
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5 // See http://script.aculo.us for more info
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7 // Permission is hereby granted, free of charge, to any person obtaining
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8 // a copy of this software and associated documentation files (the
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9 // "Software"), to deal in the Software without restriction, including
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10 // without limitation the rights to use, copy, modify, merge, publish,
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11 // distribute, sublicense, and/or sell copies of the Software, and to
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12 // permit persons to whom the Software is furnished to do so, subject to
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13 // the following conditions:
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15 // The above copyright notice and this permission notice shall be
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16 // included in all copies or substantial portions of the Software.
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18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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26 if(!Control) var Control = {};
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27 Control.Slider = Class.create();
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30 // axis: 'vertical', or 'horizontal' (default)
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35 Control.Slider.prototype = {
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36 initialize: function(handle, track, options) {
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39 if(handle instanceof Array) {
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40 this.handles = handle.collect( function(e) { return $(e) });
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42 this.handles = [$(handle)];
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45 this.track = $(track);
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46 this.options = options || {};
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48 this.axis = this.options.axis || 'horizontal';
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49 this.increment = this.options.increment || 1;
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50 this.step = parseInt(this.options.step || '1');
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51 this.range = this.options.range || $R(0,1);
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53 this.value = 0; // assure backwards compat
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54 this.values = this.handles.map( function() { return 0 });
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55 this.spans = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
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56 this.options.startSpan = $(this.options.startSpan || null);
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57 this.options.endSpan = $(this.options.endSpan || null);
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59 this.restricted = this.options.restricted || false;
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61 this.maximum = this.options.maximum || this.range.end;
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62 this.minimum = this.options.minimum || this.range.start;
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64 // Will be used to align the handle onto the track, if necessary
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65 this.alignX = parseInt(this.options.alignX || '0');
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66 this.alignY = parseInt(this.options.alignY || '0');
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68 this.trackLength = this.maximumOffset() - this.minimumOffset();
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70 this.handleLength = this.isVertical() ?
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71 (this.handles[0].offsetHeight != 0 ?
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72 this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) :
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73 (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth :
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74 this.handles[0].style.width.replace(/px$/,""));
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76 this.active = false;
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77 this.dragging = false;
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78 this.disabled = false;
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80 if(this.options.disabled) this.setDisabled();
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82 // Allowed values array
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83 this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
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84 if(this.allowedValues) {
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85 this.minimum = this.allowedValues.min();
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86 this.maximum = this.allowedValues.max();
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89 this.eventMouseDown = this.startDrag.bindAsEventListener(this);
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90 this.eventMouseUp = this.endDrag.bindAsEventListener(this);
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91 this.eventMouseMove = this.update.bindAsEventListener(this);
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93 // Initialize handles in reverse (make sure first handle is active)
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94 this.handles.each( function(h,i) {
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95 i = slider.handles.length-1-i;
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96 slider.setValue(parseFloat(
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97 (slider.options.sliderValue instanceof Array ?
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98 slider.options.sliderValue[i] : slider.options.sliderValue) ||
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99 slider.range.start), i);
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100 Element.makePositioned(h); // fix IE
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101 Event.observe(h, "mousedown", slider.eventMouseDown);
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104 Event.observe(this.track, "mousedown", this.eventMouseDown);
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105 Event.observe(document, "mouseup", this.eventMouseUp);
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106 Event.observe(document, "mousemove", this.eventMouseMove);
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108 this.initialized = true;
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110 dispose: function() {
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111 var slider = this;
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112 Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
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113 Event.stopObserving(document, "mouseup", this.eventMouseUp);
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114 Event.stopObserving(document, "mousemove", this.eventMouseMove);
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115 this.handles.each( function(h) {
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116 Event.stopObserving(h, "mousedown", slider.eventMouseDown);
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119 setDisabled: function(){
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120 this.disabled = true;
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122 setEnabled: function(){
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123 this.disabled = false;
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125 getNearestValue: function(value){
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126 if(this.allowedValues){
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127 if(value >= this.allowedValues.max()) return(this.allowedValues.max());
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128 if(value <= this.allowedValues.min()) return(this.allowedValues.min());
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130 var offset = Math.abs(this.allowedValues[0] - value);
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131 var newValue = this.allowedValues[0];
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132 this.allowedValues.each( function(v) {
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133 var currentOffset = Math.abs(v - value);
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134 if(currentOffset <= offset){
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136 offset = currentOffset;
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141 if(value > this.range.end) return this.range.end;
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142 if(value < this.range.start) return this.range.start;
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145 setValue: function(sliderValue, handleIdx){
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147 this.activeHandleIdx = handleIdx || 0;
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148 this.activeHandle = this.handles[this.activeHandleIdx];
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149 this.updateStyles();
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151 handleIdx = handleIdx || this.activeHandleIdx || 0;
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152 if(this.initialized && this.restricted) {
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153 if((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
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154 sliderValue = this.values[handleIdx-1];
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155 if((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
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156 sliderValue = this.values[handleIdx+1];
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158 sliderValue = this.getNearestValue(sliderValue);
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159 this.values[handleIdx] = sliderValue;
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160 this.value = this.values[0]; // assure backwards compat
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162 this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] =
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163 this.translateToPx(sliderValue);
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166 if(!this.dragging || !this.event) this.updateFinished();
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168 setValueBy: function(delta, handleIdx) {
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169 this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta,
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170 handleIdx || this.activeHandleIdx || 0);
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172 translateToPx: function(value) {
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174 ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) *
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175 (value - this.range.start)) + "px";
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177 translateToValue: function(offset) {
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178 return ((offset/(this.trackLength-this.handleLength) *
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179 (this.range.end-this.range.start)) + this.range.start);
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181 getRange: function(range) {
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182 var v = this.values.sortBy(Prototype.K);
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183 range = range || 0;
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184 return $R(v[range],v[range+1]);
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186 minimumOffset: function(){
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187 return(this.isVertical() ? this.alignY : this.alignX);
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189 maximumOffset: function(){
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190 return(this.isVertical() ?
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191 (this.track.offsetHeight != 0 ? this.track.offsetHeight :
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192 this.track.style.height.replace(/px$/,"")) - this.alignY :
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193 (this.track.offsetWidth != 0 ? this.track.offsetWidth :
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194 this.track.style.width.replace(/px$/,"")) - this.alignY);
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196 isVertical: function(){
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197 return (this.axis == 'vertical');
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199 drawSpans: function() {
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202 $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
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203 if(this.options.startSpan)
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204 this.setSpan(this.options.startSpan,
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205 $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
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206 if(this.options.endSpan)
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207 this.setSpan(this.options.endSpan,
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208 $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
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210 setSpan: function(span, range) {
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211 if(this.isVertical()) {
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212 span.style.top = this.translateToPx(range.start);
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213 span.style.height = this.translateToPx(range.end - range.start + this.range.start);
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215 span.style.left = this.translateToPx(range.start);
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216 span.style.width = this.translateToPx(range.end - range.start + this.range.start);
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219 updateStyles: function() {
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220 this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
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221 Element.addClassName(this.activeHandle, 'selected');
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223 startDrag: function(event) {
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224 if(Event.isLeftClick(event)) {
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225 if(!this.disabled){
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226 this.active = true;
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228 var handle = Event.element(event);
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229 var pointer = [Event.pointerX(event), Event.pointerY(event)];
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230 var track = handle;
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231 if(track==this.track) {
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232 var offsets = Position.cumulativeOffset(this.track);
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233 this.event = event;
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234 this.setValue(this.translateToValue(
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235 (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)
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237 var offsets = Position.cumulativeOffset(this.activeHandle);
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238 this.offsetX = (pointer[0] - offsets[0]);
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239 this.offsetY = (pointer[1] - offsets[1]);
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241 // find the handle (prevents issues with Safari)
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242 while((this.handles.indexOf(handle) == -1) && handle.parentNode)
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243 handle = handle.parentNode;
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245 this.activeHandle = handle;
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246 this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
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247 this.updateStyles();
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249 var offsets = Position.cumulativeOffset(this.activeHandle);
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250 this.offsetX = (pointer[0] - offsets[0]);
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251 this.offsetY = (pointer[1] - offsets[1]);
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257 update: function(event) {
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259 if(!this.dragging) this.dragging = true;
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261 // fix AppleWebKit rendering
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262 if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
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266 draw: function(event) {
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267 var pointer = [Event.pointerX(event), Event.pointerY(event)];
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268 var offsets = Position.cumulativeOffset(this.track);
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269 pointer[0] -= this.offsetX + offsets[0];
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270 pointer[1] -= this.offsetY + offsets[1];
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271 this.event = event;
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272 this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
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273 if(this.initialized && this.options.onSlide)
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274 this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
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276 endDrag: function(event) {
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277 if(this.active && this.dragging) {
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278 this.finishDrag(event, true);
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281 this.active = false;
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282 this.dragging = false;
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284 finishDrag: function(event, success) {
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285 this.active = false;
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286 this.dragging = false;
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287 this.updateFinished();
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289 updateFinished: function() {
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290 if(this.initialized && this.options.onChange)
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291 this.options.onChange(this.values.length>1 ? this.values : this.value, this);
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