Hi Diodeus,
Thanks for you quick reply! That works, but it only moves one
increment on the first click. How can I get it to keep moving along
when the linked is clicked repeatedly? Do I need to set up a loop of
some kind? Sorry, my knowledge of javascript is very limited!
On Oct 9, 6:03 pm, Diodeus <[EMAIL PROTECTED]> wrote:
> 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] -
>
> ...
>
> read more »
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