598 lines
20 KiB
JavaScript
598 lines
20 KiB
JavaScript
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'use strict';
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!function($) {
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/**
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* Slider module.
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* @module foundation.slider
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* @requires foundation.util.motion
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* @requires foundation.util.triggers
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* @requires foundation.util.keyboard
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* @requires foundation.util.touch
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*/
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class Slider {
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/**
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* Creates a new instance of a drilldown menu.
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* @class
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* @param {jQuery} element - jQuery object to make into an accordion menu.
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* @param {Object} options - Overrides to the default plugin settings.
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*/
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constructor(element, options) {
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this.$element = element;
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this.options = $.extend({}, Slider.defaults, this.$element.data(), options);
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this._init();
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Foundation.registerPlugin(this, 'Slider');
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Foundation.Keyboard.register('Slider', {
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'ltr': {
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'ARROW_RIGHT': 'increase',
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'ARROW_UP': 'increase',
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'ARROW_DOWN': 'decrease',
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'ARROW_LEFT': 'decrease',
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'SHIFT_ARROW_RIGHT': 'increase_fast',
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'SHIFT_ARROW_UP': 'increase_fast',
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'SHIFT_ARROW_DOWN': 'decrease_fast',
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'SHIFT_ARROW_LEFT': 'decrease_fast'
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},
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'rtl': {
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'ARROW_LEFT': 'increase',
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'ARROW_RIGHT': 'decrease',
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'SHIFT_ARROW_LEFT': 'increase_fast',
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'SHIFT_ARROW_RIGHT': 'decrease_fast'
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}
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});
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}
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/**
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* Initilizes the plugin by reading/setting attributes, creating collections and setting the initial position of the handle(s).
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* @function
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* @private
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*/
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_init() {
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this.inputs = this.$element.find('input');
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this.handles = this.$element.find('[data-slider-handle]');
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this.$handle = this.handles.eq(0);
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this.$input = this.inputs.length ? this.inputs.eq(0) : $(`#${this.$handle.attr('aria-controls')}`);
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this.$fill = this.$element.find('[data-slider-fill]').css(this.options.vertical ? 'height' : 'width', 0);
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var isDbl = false,
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_this = this;
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if (this.options.disabled || this.$element.hasClass(this.options.disabledClass)) {
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this.options.disabled = true;
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this.$element.addClass(this.options.disabledClass);
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}
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if (!this.inputs.length) {
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this.inputs = $().add(this.$input);
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this.options.binding = true;
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}
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this._setInitAttr(0);
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this._events(this.$handle);
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if (this.handles[1]) {
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this.options.doubleSided = true;
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this.$handle2 = this.handles.eq(1);
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this.$input2 = this.inputs.length > 1 ? this.inputs.eq(1) : $(`#${this.$handle2.attr('aria-controls')}`);
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if (!this.inputs[1]) {
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this.inputs = this.inputs.add(this.$input2);
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}
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isDbl = true;
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this._setHandlePos(this.$handle, this.options.initialStart, true, function() {
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_this._setHandlePos(_this.$handle2, _this.options.initialEnd, true);
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});
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// this.$handle.triggerHandler('click.zf.slider');
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this._setInitAttr(1);
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this._events(this.$handle2);
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}
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if (!isDbl) {
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this._setHandlePos(this.$handle, this.options.initialStart, true);
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}
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}
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/**
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* Sets the position of the selected handle and fill bar.
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* @function
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* @private
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* @param {jQuery} $hndl - the selected handle to move.
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* @param {Number} location - floating point between the start and end values of the slider bar.
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* @param {Function} cb - callback function to fire on completion.
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* @fires Slider#moved
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* @fires Slider#changed
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*/
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_setHandlePos($hndl, location, noInvert, cb) {
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// don't move if the slider has been disabled since its initialization
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if (this.$element.hasClass(this.options.disabledClass)) {
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return;
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}
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//might need to alter that slightly for bars that will have odd number selections.
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location = parseFloat(location);//on input change events, convert string to number...grumble.
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// prevent slider from running out of bounds, if value exceeds the limits set through options, override the value to min/max
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if (location < this.options.start) { location = this.options.start; }
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else if (location > this.options.end) { location = this.options.end; }
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var isDbl = this.options.doubleSided;
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if (isDbl) { //this block is to prevent 2 handles from crossing eachother. Could/should be improved.
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if (this.handles.index($hndl) === 0) {
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var h2Val = parseFloat(this.$handle2.attr('aria-valuenow'));
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location = location >= h2Val ? h2Val - this.options.step : location;
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} else {
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var h1Val = parseFloat(this.$handle.attr('aria-valuenow'));
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location = location <= h1Val ? h1Val + this.options.step : location;
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}
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}
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//this is for single-handled vertical sliders, it adjusts the value to account for the slider being "upside-down"
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//for click and drag events, it's weird due to the scale(-1, 1) css property
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if (this.options.vertical && !noInvert) {
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location = this.options.end - location;
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}
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var _this = this,
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vert = this.options.vertical,
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hOrW = vert ? 'height' : 'width',
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lOrT = vert ? 'top' : 'left',
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handleDim = $hndl[0].getBoundingClientRect()[hOrW],
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elemDim = this.$element[0].getBoundingClientRect()[hOrW],
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//percentage of bar min/max value based on click or drag point
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pctOfBar = percent(location - this.options.start, this.options.end - this.options.start).toFixed(2),
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//number of actual pixels to shift the handle, based on the percentage obtained above
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pxToMove = (elemDim - handleDim) * pctOfBar,
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//percentage of bar to shift the handle
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movement = (percent(pxToMove, elemDim) * 100).toFixed(this.options.decimal);
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//fixing the decimal value for the location number, is passed to other methods as a fixed floating-point value
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location = parseFloat(location.toFixed(this.options.decimal));
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// declare empty object for css adjustments, only used with 2 handled-sliders
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var css = {};
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this._setValues($hndl, location);
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// TODO update to calculate based on values set to respective inputs??
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if (isDbl) {
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var isLeftHndl = this.handles.index($hndl) === 0,
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//empty variable, will be used for min-height/width for fill bar
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dim,
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//percentage w/h of the handle compared to the slider bar
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handlePct = ~~(percent(handleDim, elemDim) * 100);
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//if left handle, the math is slightly different than if it's the right handle, and the left/top property needs to be changed for the fill bar
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if (isLeftHndl) {
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//left or top percentage value to apply to the fill bar.
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css[lOrT] = `${movement}%`;
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//calculate the new min-height/width for the fill bar.
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dim = parseFloat(this.$handle2[0].style[lOrT]) - movement + handlePct;
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//this callback is necessary to prevent errors and allow the proper placement and initialization of a 2-handled slider
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//plus, it means we don't care if 'dim' isNaN on init, it won't be in the future.
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if (cb && typeof cb === 'function') { cb(); }//this is only needed for the initialization of 2 handled sliders
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} else {
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//just caching the value of the left/bottom handle's left/top property
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var handlePos = parseFloat(this.$handle[0].style[lOrT]);
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//calculate the new min-height/width for the fill bar. Use isNaN to prevent false positives for numbers <= 0
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//based on the percentage of movement of the handle being manipulated, less the opposing handle's left/top position, plus the percentage w/h of the handle itself
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dim = movement - (isNaN(handlePos) ? this.options.initialStart/((this.options.end-this.options.start)/100) : handlePos) + handlePct;
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}
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// assign the min-height/width to our css object
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css[`min-${hOrW}`] = `${dim}%`;
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}
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this.$element.one('finished.zf.animate', function() {
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/**
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* Fires when the handle is done moving.
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* @event Slider#moved
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*/
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_this.$element.trigger('moved.zf.slider', [$hndl]);
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});
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//because we don't know exactly how the handle will be moved, check the amount of time it should take to move.
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var moveTime = this.$element.data('dragging') ? 1000/60 : this.options.moveTime;
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Foundation.Move(moveTime, $hndl, function() {
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//adjusting the left/top property of the handle, based on the percentage calculated above
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$hndl.css(lOrT, `${movement}%`);
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if (!_this.options.doubleSided) {
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//if single-handled, a simple method to expand the fill bar
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_this.$fill.css(hOrW, `${pctOfBar * 100}%`);
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} else {
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//otherwise, use the css object we created above
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_this.$fill.css(css);
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}
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});
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/**
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* Fires when the value has not been change for a given time.
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* @event Slider#changed
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*/
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clearTimeout(_this.timeout);
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_this.timeout = setTimeout(function(){
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_this.$element.trigger('changed.zf.slider', [$hndl]);
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}, _this.options.changedDelay);
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}
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/**
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* Sets the initial attribute for the slider element.
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* @function
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* @private
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* @param {Number} idx - index of the current handle/input to use.
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*/
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_setInitAttr(idx) {
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var id = this.inputs.eq(idx).attr('id') || Foundation.GetYoDigits(6, 'slider');
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this.inputs.eq(idx).attr({
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'id': id,
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'max': this.options.end,
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'min': this.options.start,
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'step': this.options.step
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});
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this.handles.eq(idx).attr({
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'role': 'slider',
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'aria-controls': id,
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'aria-valuemax': this.options.end,
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'aria-valuemin': this.options.start,
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'aria-valuenow': idx === 0 ? this.options.initialStart : this.options.initialEnd,
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'aria-orientation': this.options.vertical ? 'vertical' : 'horizontal',
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'tabindex': 0
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});
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}
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/**
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* Sets the input and `aria-valuenow` values for the slider element.
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* @function
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* @private
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* @param {jQuery} $handle - the currently selected handle.
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* @param {Number} val - floating point of the new value.
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*/
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_setValues($handle, val) {
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var idx = this.options.doubleSided ? this.handles.index($handle) : 0;
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this.inputs.eq(idx).val(val);
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$handle.attr('aria-valuenow', val);
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}
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/**
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* Handles events on the slider element.
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* Calculates the new location of the current handle.
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* If there are two handles and the bar was clicked, it determines which handle to move.
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* @function
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* @private
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* @param {Object} e - the `event` object passed from the listener.
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* @param {jQuery} $handle - the current handle to calculate for, if selected.
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* @param {Number} val - floating point number for the new value of the slider.
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* TODO clean this up, there's a lot of repeated code between this and the _setHandlePos fn.
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*/
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_handleEvent(e, $handle, val) {
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var value, hasVal;
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if (!val) {//click or drag events
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e.preventDefault();
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var _this = this,
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vertical = this.options.vertical,
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param = vertical ? 'height' : 'width',
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direction = vertical ? 'top' : 'left',
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eventOffset = vertical ? e.pageY : e.pageX,
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halfOfHandle = this.$handle[0].getBoundingClientRect()[param] / 2,
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barDim = this.$element[0].getBoundingClientRect()[param],
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windowScroll = vertical ? $(window).scrollTop() : $(window).scrollLeft();
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var elemOffset = this.$element.offset()[direction];
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// touch events emulated by the touch util give position relative to screen, add window.scroll to event coordinates...
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// best way to guess this is simulated is if clientY == pageY
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if (e.clientY === e.pageY) { eventOffset = eventOffset + windowScroll; }
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var eventFromBar = eventOffset - elemOffset;
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var barXY;
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if (eventFromBar < 0) {
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barXY = 0;
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} else if (eventFromBar > barDim) {
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barXY = barDim;
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} else {
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barXY = eventFromBar;
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}
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offsetPct = percent(barXY, barDim);
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value = (this.options.end - this.options.start) * offsetPct + this.options.start;
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// turn everything around for RTL, yay math!
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if (Foundation.rtl() && !this.options.vertical) {value = this.options.end - value;}
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value = _this._adjustValue(null, value);
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//boolean flag for the setHandlePos fn, specifically for vertical sliders
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hasVal = false;
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if (!$handle) {//figure out which handle it is, pass it to the next function.
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var firstHndlPos = absPosition(this.$handle, direction, barXY, param),
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secndHndlPos = absPosition(this.$handle2, direction, barXY, param);
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$handle = firstHndlPos <= secndHndlPos ? this.$handle : this.$handle2;
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}
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} else {//change event on input
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value = this._adjustValue(null, val);
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hasVal = true;
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}
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this._setHandlePos($handle, value, hasVal);
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}
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/**
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* Adjustes value for handle in regard to step value. returns adjusted value
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* @function
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* @private
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* @param {jQuery} $handle - the selected handle.
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* @param {Number} value - value to adjust. used if $handle is falsy
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*/
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_adjustValue($handle, value) {
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var val,
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step = this.options.step,
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div = parseFloat(step/2),
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left, prev_val, next_val;
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if (!!$handle) {
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val = parseFloat($handle.attr('aria-valuenow'));
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}
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else {
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val = value;
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}
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left = val % step;
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prev_val = val - left;
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next_val = prev_val + step;
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if (left === 0) {
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return val;
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}
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val = val >= prev_val + div ? next_val : prev_val;
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return val;
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}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds event listeners to the slider elements.
|
||
|
|
* @function
|
||
|
|
* @private
|
||
|
|
* @param {jQuery} $handle - the current handle to apply listeners to.
|
||
|
|
*/
|
||
|
|
_events($handle) {
|
||
|
|
var _this = this,
|
||
|
|
curHandle,
|
||
|
|
timer;
|
||
|
|
|
||
|
|
this.inputs.off('change.zf.slider').on('change.zf.slider', function(e) {
|
||
|
|
var idx = _this.inputs.index($(this));
|
||
|
|
_this._handleEvent(e, _this.handles.eq(idx), $(this).val());
|
||
|
|
});
|
||
|
|
|
||
|
|
if (this.options.clickSelect) {
|
||
|
|
this.$element.off('click.zf.slider').on('click.zf.slider', function(e) {
|
||
|
|
if (_this.$element.data('dragging')) { return false; }
|
||
|
|
|
||
|
|
if (!$(e.target).is('[data-slider-handle]')) {
|
||
|
|
if (_this.options.doubleSided) {
|
||
|
|
_this._handleEvent(e);
|
||
|
|
} else {
|
||
|
|
_this._handleEvent(e, _this.$handle);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.options.draggable) {
|
||
|
|
this.handles.addTouch();
|
||
|
|
|
||
|
|
var $body = $('body');
|
||
|
|
$handle
|
||
|
|
.off('mousedown.zf.slider')
|
||
|
|
.on('mousedown.zf.slider', function(e) {
|
||
|
|
$handle.addClass('is-dragging');
|
||
|
|
_this.$fill.addClass('is-dragging');//
|
||
|
|
_this.$element.data('dragging', true);
|
||
|
|
|
||
|
|
curHandle = $(e.currentTarget);
|
||
|
|
|
||
|
|
$body.on('mousemove.zf.slider', function(e) {
|
||
|
|
e.preventDefault();
|
||
|
|
_this._handleEvent(e, curHandle);
|
||
|
|
|
||
|
|
}).on('mouseup.zf.slider', function(e) {
|
||
|
|
_this._handleEvent(e, curHandle);
|
||
|
|
|
||
|
|
$handle.removeClass('is-dragging');
|
||
|
|
_this.$fill.removeClass('is-dragging');
|
||
|
|
_this.$element.data('dragging', false);
|
||
|
|
|
||
|
|
$body.off('mousemove.zf.slider mouseup.zf.slider');
|
||
|
|
});
|
||
|
|
})
|
||
|
|
// prevent events triggered by touch
|
||
|
|
.on('selectstart.zf.slider touchmove.zf.slider', function(e) {
|
||
|
|
e.preventDefault();
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
$handle.off('keydown.zf.slider').on('keydown.zf.slider', function(e) {
|
||
|
|
var _$handle = $(this),
|
||
|
|
idx = _this.options.doubleSided ? _this.handles.index(_$handle) : 0,
|
||
|
|
oldValue = parseFloat(_this.inputs.eq(idx).val()),
|
||
|
|
newValue;
|
||
|
|
|
||
|
|
// handle keyboard event with keyboard util
|
||
|
|
Foundation.Keyboard.handleKey(e, 'Slider', {
|
||
|
|
decrease: function() {
|
||
|
|
newValue = oldValue - _this.options.step;
|
||
|
|
},
|
||
|
|
increase: function() {
|
||
|
|
newValue = oldValue + _this.options.step;
|
||
|
|
},
|
||
|
|
decrease_fast: function() {
|
||
|
|
newValue = oldValue - _this.options.step * 10;
|
||
|
|
},
|
||
|
|
increase_fast: function() {
|
||
|
|
newValue = oldValue + _this.options.step * 10;
|
||
|
|
},
|
||
|
|
handled: function() { // only set handle pos when event was handled specially
|
||
|
|
e.preventDefault();
|
||
|
|
_this._setHandlePos(_$handle, newValue, true);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
/*if (newValue) { // if pressed key has special function, update value
|
||
|
|
e.preventDefault();
|
||
|
|
_this._setHandlePos(_$handle, newValue);
|
||
|
|
}*/
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Destroys the slider plugin.
|
||
|
|
*/
|
||
|
|
destroy() {
|
||
|
|
this.handles.off('.zf.slider');
|
||
|
|
this.inputs.off('.zf.slider');
|
||
|
|
this.$element.off('.zf.slider');
|
||
|
|
|
||
|
|
Foundation.unregisterPlugin(this);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Slider.defaults = {
|
||
|
|
/**
|
||
|
|
* Minimum value for the slider scale.
|
||
|
|
* @option
|
||
|
|
* @example 0
|
||
|
|
*/
|
||
|
|
start: 0,
|
||
|
|
/**
|
||
|
|
* Maximum value for the slider scale.
|
||
|
|
* @option
|
||
|
|
* @example 100
|
||
|
|
*/
|
||
|
|
end: 100,
|
||
|
|
/**
|
||
|
|
* Minimum value change per change event.
|
||
|
|
* @option
|
||
|
|
* @example 1
|
||
|
|
*/
|
||
|
|
step: 1,
|
||
|
|
/**
|
||
|
|
* Value at which the handle/input *(left handle/first input)* should be set to on initialization.
|
||
|
|
* @option
|
||
|
|
* @example 0
|
||
|
|
*/
|
||
|
|
initialStart: 0,
|
||
|
|
/**
|
||
|
|
* Value at which the right handle/second input should be set to on initialization.
|
||
|
|
* @option
|
||
|
|
* @example 100
|
||
|
|
*/
|
||
|
|
initialEnd: 100,
|
||
|
|
/**
|
||
|
|
* Allows the input to be located outside the container and visible. Set to by the JS
|
||
|
|
* @option
|
||
|
|
* @example false
|
||
|
|
*/
|
||
|
|
binding: false,
|
||
|
|
/**
|
||
|
|
* Allows the user to click/tap on the slider bar to select a value.
|
||
|
|
* @option
|
||
|
|
* @example true
|
||
|
|
*/
|
||
|
|
clickSelect: true,
|
||
|
|
/**
|
||
|
|
* Set to true and use the `vertical` class to change alignment to vertical.
|
||
|
|
* @option
|
||
|
|
* @example false
|
||
|
|
*/
|
||
|
|
vertical: false,
|
||
|
|
/**
|
||
|
|
* Allows the user to drag the slider handle(s) to select a value.
|
||
|
|
* @option
|
||
|
|
* @example true
|
||
|
|
*/
|
||
|
|
draggable: true,
|
||
|
|
/**
|
||
|
|
* Disables the slider and prevents event listeners from being applied. Double checked by JS with `disabledClass`.
|
||
|
|
* @option
|
||
|
|
* @example false
|
||
|
|
*/
|
||
|
|
disabled: false,
|
||
|
|
/**
|
||
|
|
* Allows the use of two handles. Double checked by the JS. Changes some logic handling.
|
||
|
|
* @option
|
||
|
|
* @example false
|
||
|
|
*/
|
||
|
|
doubleSided: false,
|
||
|
|
/**
|
||
|
|
* Potential future feature.
|
||
|
|
*/
|
||
|
|
// steps: 100,
|
||
|
|
/**
|
||
|
|
* Number of decimal places the plugin should go to for floating point precision.
|
||
|
|
* @option
|
||
|
|
* @example 2
|
||
|
|
*/
|
||
|
|
decimal: 2,
|
||
|
|
/**
|
||
|
|
* Time delay for dragged elements.
|
||
|
|
*/
|
||
|
|
// dragDelay: 0,
|
||
|
|
/**
|
||
|
|
* Time, in ms, to animate the movement of a slider handle if user clicks/taps on the bar. Needs to be manually set if updating the transition time in the Sass settings.
|
||
|
|
* @option
|
||
|
|
* @example 200
|
||
|
|
*/
|
||
|
|
moveTime: 200,//update this if changing the transition time in the sass
|
||
|
|
/**
|
||
|
|
* Class applied to disabled sliders.
|
||
|
|
* @option
|
||
|
|
* @example 'disabled'
|
||
|
|
*/
|
||
|
|
disabledClass: 'disabled',
|
||
|
|
/**
|
||
|
|
* Will invert the default layout for a vertical<span data-tooltip title="who would do this???"> </span>slider.
|
||
|
|
* @option
|
||
|
|
* @example false
|
||
|
|
*/
|
||
|
|
invertVertical: false,
|
||
|
|
/**
|
||
|
|
* Milliseconds before the `changed.zf-slider` event is triggered after value change.
|
||
|
|
* @option
|
||
|
|
* @example 500
|
||
|
|
*/
|
||
|
|
changedDelay: 500
|
||
|
|
};
|
||
|
|
|
||
|
|
function percent(frac, num) {
|
||
|
|
return (frac / num);
|
||
|
|
}
|
||
|
|
function absPosition($handle, dir, clickPos, param) {
|
||
|
|
return Math.abs(($handle.position()[dir] + ($handle[param]() / 2)) - clickPos);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Window exports
|
||
|
|
Foundation.plugin(Slider, 'Slider');
|
||
|
|
|
||
|
|
}(jQuery);
|
||
|
|
|
||
|
|
//*********this is in case we go to static, absolute positions instead of dynamic positioning********
|
||
|
|
// this.setSteps(function() {
|
||
|
|
// _this._events();
|
||
|
|
// var initStart = _this.options.positions[_this.options.initialStart - 1] || null;
|
||
|
|
// var initEnd = _this.options.initialEnd ? _this.options.position[_this.options.initialEnd - 1] : null;
|
||
|
|
// if (initStart || initEnd) {
|
||
|
|
// _this._handleEvent(initStart, initEnd);
|
||
|
|
// }
|
||
|
|
// });
|
||
|
|
|
||
|
|
//***********the other part of absolute positions*************
|
||
|
|
// Slider.prototype.setSteps = function(cb) {
|
||
|
|
// var posChange = this.$element.outerWidth() / this.options.steps;
|
||
|
|
// var counter = 0
|
||
|
|
// while(counter < this.options.steps) {
|
||
|
|
// if (counter) {
|
||
|
|
// this.options.positions.push(this.options.positions[counter - 1] + posChange);
|
||
|
|
// } else {
|
||
|
|
// this.options.positions.push(posChange);
|
||
|
|
// }
|
||
|
|
// counter++;
|
||
|
|
// }
|
||
|
|
// cb();
|
||
|
|
// };
|