First you need to store your current slider position when the scroll occurs. Then set the slider position to this value +/- your increment when the link is clicked.
<a href="javascript://" onclick="slider2.setValue(slidePos+.1)">scroll right</a> var slidePos = 0 var slider2 = new Control.Slider('handle2', 'track2', { onSlide: function(v) { scrollHorizontal(v, $('scrollable1'), slider2); }, onChange: function(v) { scrollHorizontal(v, $('scrollable1'), slider2);slidePos=v } }); On Oct 9, 12:10 pm, djvern <[EMAIL PROTECTED]> wrote: > Hi, > > I am using a Scriptaculous slider to scroll a div but I want to be > able to control the position of the scroller using buttons too. See my > example here: > > http://www.stickycreation.co.uk/laurus/scroll_testX.html > > This file links to the prototype framework and the js file slider.js, > which contains the following code: > > // script.aculo.us slider.js v1.6.5, Wed Nov 08 14:17:49 CET 2006 > > // Copyright (c) 2005, 2006 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: <a href="http:// > script.aculo.us/">http://script.aculo.us/</a> > > if(!Control) var Control = {}; > Control.Slider = Class.create(); > > // options: > // axis: 'vertical', or 'horizontal' (default) > // > // callbacks: > // onChange(value) > // onSlide(value) > Control.Slider.prototype = { > initialize: function(handle, track, options) { > var slider = this; > > if(handle instanceof Array) { > 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( > (slider.options.sliderValue instanceof Array ? > slider.options.sliderValue[i] : slider.options.sliderValue) > || > slider.range.start), i); > Element.makePositioned(h); // fix IE > Event.observe(h, "mousedown", slider.eventMouseDown); > }); > > Event.observe(this.track, "mousedown", this.eventMouseDown); > Event.observe(document, "mouseup", this.eventMouseUp); > Event.observe(document, "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.alignY); > }, > 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 = Position.cumulativeOffset(this.track); > this.event = event; > this.setValue(this.translateToValue( > (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]- > offsets[0])-(this.handleLength/2) > )); > var offsets = Position.cumulativeOffset(this.activeHandle); > 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 = > Position.cumulativeOffset(this.activeHandle); > 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); > // fix AppleWebKit rendering > if(navigator.appVersion.indexOf('AppleWebKit')>0) > window.scrollBy(0,0); > Event.stop(event); > } > }, > draw: function(event) { > var pointer = [Event.pointerX(event), Event.pointerY(event)]; > var offsets = Position.cumulativeOffset(this.track); > 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; > } > > } > > My question is how can I enable the text-link buttons I have created > (scroll left/scroll right) to move the scroll bar together with the > div content along? If it’s not possible with the code I’ve used is > there a better solution I could use? Any help would be greatly > appreciated! > > Dave Vernon --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Prototype & script.aculo.us" group. To post to this group, send email to prototype-scriptaculous@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/prototype-scriptaculous?hl=en -~----------~----~----~----~------~----~------~--~---