282 lines
7.6 KiB
HTML
282 lines
7.6 KiB
HTML
<html>
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<head>
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<title>Graphical ARIA Slider</title>
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<script type="text/javascript">
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/* ****** Variables to be set ****** */
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var sliderSize = 300; //Width of slider in pixels
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var moveValue = 10; //Value to change the slider on any action.
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function displaySlider(slider)
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{
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var valueNow = parseInt(slider.getAttribute("aria-valuenow"));
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var valueMin = parseInt(slider.getAttribute("aria-valuemin"));
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var valueMax = parseInt(slider.getAttribute("aria-valuemax"));
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var barWidth = slider.firstChild.scrollWidth;
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var grade = sliderSize/valueMax;
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//Set the left padding.
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var leftPad = valueNow*grade-barWidth/2;
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// if it is less then the min width.
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if(leftPad < valueMin*grade){
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leftPad = valueMin*grade;
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}
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// if it is greater than the max width
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if(leftPad > valueMax*grade-barWidth){
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leftPad = valueMax*grade-barWidth;
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}
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//The deferance between max and the current value, were going to use it like the valueMin was
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var valueDown = valueMax-valueNow;
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//Set the right padding
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var rightPad = valueDown*grade-barWidth/2;
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//If it is less than zero
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if(rightPad < 0){
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rightPad = 0;
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}
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//If it is too big
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if(rightPad > valueMax*grade-barWidth-valueMin*grade){
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rightPad = valueMax*grade-barWidth-valueMin*grade;
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}
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//Remove cases where *.5 is involved, this can cause the width to change by 1px if we don't fix it
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if(rightPad >= leftPad){
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var rightNew = Math.round(rightPad);
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if(rightNew != rightPad){
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rightPad = rightNew;
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leftPad = leftPad-0.5;
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}
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}
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if(leftPad >= rightPad){
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var leftNew = Math.round(leftPad);
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if(leftNew != leftPad){
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leftPad = leftNew;
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rightPad = rightPad-0.5;
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}
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}
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//set the padding
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slider.style.paddingRight = rightPad+'px';
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slider.style.paddingLeft = leftPad+'px';
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return false;
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}
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function handleSliderKey(slider, event)
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{
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var valueNow = parseInt(slider.getAttribute("aria-valuenow"));
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var valueMin = parseInt(slider.getAttribute("aria-valuemin"));
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var valueMax = parseInt(slider.getAttribute("aria-valuemax"));
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// Find the key press and respond to it
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var delta = 0;
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var delta = 0;
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var kLeft = 37;
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var kRight = 39;
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var kHome = 36;
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var kEnd = 35;
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if (event.keyCode == kLeft) {
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delta = -moveValue/2;
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}
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else if (event.keyCode == kRight) {
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delta = moveValue/2;
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}
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else if (event.keyCode == kHome) {
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delta = -( valueNow - valueMin );
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}
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else if (event.keyCode == kEnd) {
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delta = valueMax - valueNow
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}
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else {
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return true;
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}
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// Stop the values going over the max and min
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valueNow += delta;
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if (valueNow < valueMin) {
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valueNow = valueMin;
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}
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if (valueNow > valueMax) {
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valueNow = valueMax;
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}
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// Set the value and move the slider
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slider.setAttribute("aria-valuenow", valueNow);
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slider.setAttribute("aria-valuetext", "$" + valueNow + ".00" );
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displaySlider(slider);
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return false;
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}
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function sliderButton(event, where, id)
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{
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var slider = document.getElementById(id);
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var valueNow = parseInt(slider.getAttribute("aria-valuenow"));
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var valueMin = parseInt(slider.getAttribute("aria-valuemin"));
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var valueMax = parseInt(slider.getAttribute("aria-valuemax"));
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if (where == 'after') {
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var value = -moveValue;
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} else {
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var value = moveValue;
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}
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// Enter was pressed or mouse clicked on the button
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if (event.keyCode == 13 || event.button == 0){
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// Calculate new value
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var valueNow = valueNow + value;
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// Stop the values going over the max and min
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if (valueNow < valueMin) {
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valueNow = valueMin;
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} else if(valueNow > valueMax) {
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valueNow = valueMax;
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}
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// Set the value and move the slider
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slider.setAttribute("aria-valuenow", valueNow);
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slider.setAttribute("aria-valuetext", "$" + valueNow + ".00" );
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displaySlider(slider);
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}
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}
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function barMouseDown(event, bar)
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{
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if (event.preventDefault) {
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event.preventDefault();
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}
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bar.id = 'active';
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try {
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document.addEventListener('mousemove',mouseMove, true);
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document.addEventListener('mouseup',barMouseUp, true);
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} catch(ex) { // IE
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document.attachEvent('onmousemove',mouseMove,true);
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document.attachEvent('onmouseup',barMouseUp,true);
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}
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return false
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}
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function barMouseUp()
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{
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var bar = document.getElementById('active');
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bar.removeAttribute('id');
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try {
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document.removeEventListener('mousemove', mouseMove, true);
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document.removeEventListener('mouseup', barMouseUp, true);
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}
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catch (ex) { // IE
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document.detachEvent('onmousemove', mouseMove, true);
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document.detachEvent('onmouseup', barMouseUp, true);
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}
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}
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function mouseMove(event)
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{
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//Get the slider we are moveing
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var slider = document.getElementById('active').parentNode;
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var valueNow = parseInt(slider.getAttribute("aria-valuenow"));
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var valueMin = parseInt(slider.getAttribute("aria-valuemin"));
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var valueMax = parseInt(slider.getAttribute("aria-valuemax"));
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var grade = sliderSize/valueMax;
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// Find what the new value should be and round it.
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valueNow = event.clientX/grade-slider.offsetLeft/grade;
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valueNow = Math.round(valueNow);
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//Stop the values going over the max and min
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if (valueNow < valueMin) {
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valueNow = valueMin;
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}
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if (valueNow > valueMax) {
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valueNow = valueMax;
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}
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//set the value and move the slider
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slider.setAttribute("aria-valuenow", valueNow);
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displaySlider(slider);
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}
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function sliderMouseDown(slider,event)
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{
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var valueNow = parseInt(slider.getAttribute("aria-valuenow"));
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var valueMin = parseInt(slider.getAttribute("aria-valuemin"));
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var valueMax = parseInt(slider.getAttribute("aria-valuemax"));
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var grade = sliderSize/valueMax;
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// Find where was clicked, and were the bar is.
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clickPos = event.clientX-slider.offsetLeft;
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var barWidth = slider.firstChild.scrollWidth;
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var barPos = slider.firstChild.offsetLeft-slider.offsetLeft;
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// Change the value
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if (clickPos > barPos && clickPos < barPos+barWidth) {
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return true;
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} else if(clickPos > barPos) {
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var valueNow = valueNow+moveValue;
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if(valueNow > clickPos/grade){
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valueNow = clickPos/grade;
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}
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} else if(clickPos < barPos+barWidth) {
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var valueNow = valueNow-moveValue;
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if(valueNow < clickPos/grade){
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valueNow = clickPos/grade;
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}
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}
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// Set the value and move the slider
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slider.setAttribute("aria-valuenow", valueNow);
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displaySlider(slider);
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if (event.preventDefault) {
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event.preventDefault();
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}
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return false;
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}
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//--><!]]>
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</script>
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<style type="text/css">
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<!--
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span.right {
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background:url('right.png') no-repeat;
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width:17px;
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}
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span.left {
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background:url('left.png') no-repeat;
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width:17px;
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}
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#slider1 {
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background:url('back.png') repeat-x;
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height:17px;
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}
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.bar {
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background:url('slider.png') no-repeat;
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height:17px;
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width:17px;
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}
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.slider span {
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display:table-cell;
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}
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-->
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</style>
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<style type="text/css"></style></head>
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<body onload="displaySlider(document.getElementById('slider1'));">
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<div class="slider">
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<span>0</span>
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<span role="button" title="Move slider left" class="left" onclick="sliderButton(event, 'after', 'slider1');" onkeypress="sliderButton(event, 'after', 'slider1');"></span>
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<span title="My slider" tabindex="0" id="slider1" role="slider" aria-valuenow="10" aria-valuemin="0" aria-valuemax="100" aria-valuetext="10%" onmousedown="sliderMouseDown(this,event);" onkeydown="return handleSliderKey(this, event);" style="padding-right: 262px; padding-left: 21px;"><span class="bar" onmousedown="barMouseDown(event,this)"></span>
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</span>
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<span title="Move slider right" role="button" class="right" onclick="sliderButton(event, 'before', 'slider1');" onkeypress="sliderButton(event, 'before', 'slider1');"></span>
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<span>100</span>
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</div>
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</body>
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</html>
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