YUI Library Examples: Slider Control: Horizontal Slider with two thumbs

Building a dual thumb Slider

You supply your own markup for the slider. Keep in mind the following points about markup for YUI Dual Thumb Slider Control implementations:

The thumb elements should be children of the slider background.
We use <img> elements rather than a CSS background for the thumbs to get around a performance bottleneck when animating thumb positions in IE.
Don't apply a CSS border to the slider background.
The background element should have an explicit CSS position: relative or absolute.
Both thumb elements should have an explicit CSS position: absolute and be initially placed at the zero position of the background. Set their initial position in the constructor if desired.

CSS:

Markup:

Code:

(function () {
    YAHOO.namespace('example');

var Dom = YAHOO.util.Dom;

// Slider has a range of 200 pixels
    var range = 200;

// No ticks for this example
    var tickSize = 0;

// We'll set a minimum distance the thumbs can be from one another
    var minThumbDistance = 10;

// Initial values for the thumbs
    var initValues = [100,130];

// Conversion factor from 0-200 pixels to 100-1000
    // Note 20 pixels are subtracted from the range to account for the
    // thumb values calculated from their center point (10 pixels from
    // the center of the left thumb + 10 pixels from the center of the
    // right thumb)
    var cf = 900/(range - 20);

// Set up a function to convert the min and max values into something useful
    var convert = function (val) {
        return Math.round(val * cf + 100);
    };

// Slider set up is done when the DOM is ready
    YAHOO.util.Event.onDOMReady(function () {
        var demo_bg = Dom.get("demo_bg"),
            info    = Dom.get("demo_info"),
            from    = Dom.get("demo_from"),
            to      = Dom.get("demo_to");

// Create the DualSlider
        var slider = YAHOO.widget.Slider.getHorizDualSlider(demo_bg,
            "demo_min_thumb", "demo_max_thumb",
            range, tickSize, initValues);

slider.minRange = minThumbDistance;
        
        // Custom function to update the text fields, the converted value
        // report and the slider's title attribute
        var updateUI = function () {
            from.value = slider.minVal;
            to.value   = slider.maxVal;

// Update the converted values and the slider's title.
            // Account for the thumb width offsetting the value range by
            // subtracting the thumb width from the max value.
            var min = convert(slider.minVal),
                max = convert(slider.maxVal - 20);

info.innerHTML = "MIN: " + min + " " +
 "MAX: " + max + "";
 demo_bg.title = "Current range " + min + " - " + max;
 };

// Subscribe to the dual thumb slider's change and ready events to
        // report the state.
        slider.subscribe('ready', updateUI);
        slider.subscribe('change', updateUI);

// Wire up the button to update the slider
        YAHOO.util.Event.on('demo_btn','click',function () {
            // Get the int values from the inputs
            var min = Math.abs(parseInt(from.value,10)|0),
                max = Math.abs(parseInt(to.value,10)|0);

if (min > max) {
                var hold = min;
                min = max;
                max = hold;
            }

// Verify the values are in range
            min = Math.min(min,range - 30);
            max = Math.max(Math.min(max,range),min + 20 + minThumbDistance);

// Set the new values on the slider
            slider.setValues(min,max);
        });
        // Attach the slider to the YAHOO.example namespace for public probing
        YAHOO.example.slider = slider;
    });
})();

YUI Logger Output:

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YUI Library Examples: Slider Control: Horizontal Slider with two thumbs

Building a dual thumb Slider

YUI Logger Output:

Slider Control Examples:

More Slider Control Resources:

YUI Library Examples: Slider Control: Horizontal Slider with two thumbs

Slider Control: Horizontal Slider with two thumbs

Converted values:

Building a dual thumb Slider

YUI Logger Output:

Slider Control Examples:

More Slider Control Resources: