/instiki/svnpassword

// script.aculo.us slider.js v1.9.0, Thu Dec 23 16:54:48 -0500 2010

// Copyright (c) 2005-2010 Marty Haught, Thomas Fuchs

//

// script.aculo.us is freely distributable under the terms of an MIT-style license.

// For details, see the script.aculo.us web site: http://script.aculo.us/

if (!Control) var Control = { };

// options:

// axis: 'vertical', or 'horizontal' (default)

//

// callbacks:

// onChange(value)

// onSlide(value)

Control.Slider = Class.create({

 initialize: function(handle, track, options) {

 var slider = this;

 if (Object.isArray(handle)) {

 this.handles = handle.collect( function(e) { return $(e) });

 } else {

 this.handles = [$(handle)];

 }

 this.track = $(track);

 this.options = options || { };

 this.axis = this.options.axis || 'horizontal';

 this.increment = this.options.increment || 1;

 this.step = parseInt(this.options.step || '1');

 this.range = this.options.range || $R(0,1);

 this.value = 0; // assure backwards compat

 this.values = this.handles.map( function() { return 0 });

 this.spans = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;

 this.options.startSpan = $(this.options.startSpan || null);

 this.options.endSpan = $(this.options.endSpan || null);

 this.restricted = this.options.restricted || false;

 this.maximum = this.options.maximum || this.range.end;

 this.minimum = this.options.minimum || this.range.start;

 // Will be used to align the handle onto the track, if necessary

 this.alignX = parseInt(this.options.alignX || '0');

 this.alignY = parseInt(this.options.alignY || '0');

 this.trackLength = this.maximumOffset() - this.minimumOffset();

 this.handleLength = this.isVertical() ?

 (this.handles[0].offsetHeight != 0 ?

 this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) :

 (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth :

 this.handles[0].style.width.replace(/px$/,""));

 this.active = false;

 this.dragging = false;

 this.disabled = false;

 if (this.options.disabled) this.setDisabled();

 // Allowed values array

 this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;

 if (this.allowedValues) {

 this.minimum = this.allowedValues.min();

 this.maximum = this.allowedValues.max();

 }

 this.eventMouseDown = this.startDrag.bindAsEventListener(this);

 this.eventMouseUp = this.endDrag.bindAsEventListener(this);

 this.eventMouseMove = this.update.bindAsEventListener(this);

 // Initialize handles in reverse (make sure first handle is active)

 this.handles.each( function(h,i) {

 i = slider.handles.length-1-i;

 slider.setValue(parseFloat(

 (Object.isArray(slider.options.sliderValue) ?

 slider.options.sliderValue[i] : slider.options.sliderValue) ||

 slider.range.start), i);

 h.makePositioned().observe("mousedown", slider.eventMouseDown);

 });

 this.track.observe("mousedown", this.eventMouseDown);

 document.observe("mouseup", this.eventMouseUp);

 document.observe("mousemove", this.eventMouseMove);

 this.initialized = true;

 },

 dispose: function() {

 var slider = this;

 Event.stopObserving(this.track, "mousedown", this.eventMouseDown);

 Event.stopObserving(document, "mouseup", this.eventMouseUp);

 Event.stopObserving(document, "mousemove", this.eventMouseMove);

 this.handles.each( function(h) {

 Event.stopObserving(h, "mousedown", slider.eventMouseDown);

 });

 },

 setDisabled: function(){

 this.disabled = true;

 },

 setEnabled: function(){

 this.disabled = false;

 },

 getNearestValue: function(value){

 if (this.allowedValues){

 if (value >= this.allowedValues.max()) return(this.allowedValues.max());

 if (value <= this.allowedValues.min()) return(this.allowedValues.min());

 var offset = Math.abs(this.allowedValues[0] - value);

 var newValue = this.allowedValues[0];

 this.allowedValues.each( function(v) {

 var currentOffset = Math.abs(v - value);

 if (currentOffset <= offset){

 newValue = v;

 offset = currentOffset;

 }

 });

 return newValue;

 }

 if (value > this.range.end) return this.range.end;

 if (value < this.range.start) return this.range.start;

 return value;

 },

 setValue: function(sliderValue, handleIdx){

 if (!this.active) {

 this.activeHandleIdx = handleIdx || 0;

 this.activeHandle = this.handles[this.activeHandleIdx];

 this.updateStyles();

 }

 handleIdx = handleIdx || this.activeHandleIdx || 0;

 if (this.initialized && this.restricted) {

 if ((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))

 sliderValue = this.values[handleIdx-1];

 if ((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))

 sliderValue = this.values[handleIdx+1];

 }

 sliderValue = this.getNearestValue(sliderValue);

 this.values[handleIdx] = sliderValue;

 this.value = this.values[0]; // assure backwards compat

 this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] =

 this.translateToPx(sliderValue);

 this.drawSpans();

 if (!this.dragging || !this.event) this.updateFinished();

 },

 setValueBy: function(delta, handleIdx) {

 this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta,

 handleIdx || this.activeHandleIdx || 0);

 },

 translateToPx: function(value) {

 return Math.round(

 ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) *

 (value - this.range.start)) + "px";

 },

 translateToValue: function(offset) {

 return ((offset/(this.trackLength-this.handleLength) *

 (this.range.end-this.range.start)) + this.range.start);

 },

 getRange: function(range) {

 var v = this.values.sortBy(Prototype.K);

 range = range || 0;

 return $R(v[range],v[range+1]);

 },

 minimumOffset: function(){

 return(this.isVertical() ? this.alignY : this.alignX);

 },

 maximumOffset: function(){

 return(this.isVertical() ?

 (this.track.offsetHeight != 0 ? this.track.offsetHeight :

 this.track.style.height.replace(/px$/,"")) - this.alignY :

 (this.track.offsetWidth != 0 ? this.track.offsetWidth :

 this.track.style.width.replace(/px$/,"")) - this.alignX);

 },

 isVertical: function(){

 return (this.axis == 'vertical');

 },

 drawSpans: function() {

 var slider = this;

 if (this.spans)

 $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });

 if (this.options.startSpan)

 this.setSpan(this.options.startSpan,

 $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));

 if (this.options.endSpan)

 this.setSpan(this.options.endSpan,

 $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));

 },

 setSpan: function(span, range) {

 if (this.isVertical()) {

 span.style.top = this.translateToPx(range.start);

 span.style.height = this.translateToPx(range.end - range.start + this.range.start);

 } else {

 span.style.left = this.translateToPx(range.start);

 span.style.width = this.translateToPx(range.end - range.start + this.range.start);

 }

 },

 updateStyles: function() {

 this.handles.each( function(h){ Element.removeClassName(h, 'selected') });

 Element.addClassName(this.activeHandle, 'selected');

 },

 startDrag: function(event) {

 if (Event.isLeftClick(event)) {

 if (!this.disabled){

 this.active = true;

 var handle = Event.element(event);

 var pointer = [Event.pointerX(event), Event.pointerY(event)];

 var track = handle;

 if (track==this.track) {

 var offsets = this.track.cumulativeOffset();

 this.event = event;

 this.setValue(this.translateToValue(

 (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)

 ));

 var offsets = this.activeHandle.cumulativeOffset();

 this.offsetX = (pointer[0] - offsets[0]);

 this.offsetY = (pointer[1] - offsets[1]);

 } else {

 // find the handle (prevents issues with Safari)

 while((this.handles.indexOf(handle) == -1) && handle.parentNode)

 handle = handle.parentNode;

 if (this.handles.indexOf(handle)!=-1) {

 this.activeHandle = handle;

 this.activeHandleIdx = this.handles.indexOf(this.activeHandle);

 this.updateStyles();

 var offsets = this.activeHandle.cumulativeOffset();

 this.offsetX = (pointer[0] - offsets[0]);

 this.offsetY = (pointer[1] - offsets[1]);

 }

 }

 }

 Event.stop(event);

 }

 },

 update: function(event) {

 if (this.active) {

 if (!this.dragging) this.dragging = true;

 this.draw(event);

 if (Prototype.Browser.WebKit) window.scrollBy(0,0);

 Event.stop(event);

 }

 },

 draw: function(event) {

 var pointer = [Event.pointerX(event), Event.pointerY(event)];

 var offsets = this.track.cumulativeOffset();

 pointer[0] -= this.offsetX + offsets[0];

 pointer[1] -= this.offsetY + offsets[1];

 this.event = event;

 this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));

 if (this.initialized && this.options.onSlide)

 this.options.onSlide(this.values.length>1 ? this.values : this.value, this);

 },

 endDrag: function(event) {

 if (this.active && this.dragging) {

 this.finishDrag(event, true);

 Event.stop(event);

 }

 this.active = false;

 this.dragging = false;

 },

 finishDrag: function(event, success) {

 this.active = false;

 this.dragging = false;

 this.updateFinished();

 },

 updateFinished: function() {

 if (this.initialized && this.options.onChange)

 this.options.onChange(this.values.length>1 ? this.values : this.value, this);

 this.event = null;

 }

});