carbon-components
Version:
Carbon Components is a component library for IBM Cloud
251 lines (215 loc) • 9.09 kB
JavaScript
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import eventedState from '../../globals/js/mixins/evented-state';
import handles from '../../globals/js/mixins/handles';
import on from '../../globals/js/misc/on';
var Slider = function (_mixin) {
_inherits(Slider, _mixin);
/**
* Slider.
* @extends CreateComponent
* @extends InitComponentBySearch
* @extends Handles
* @param {HTMLElement} element The element working as an slider.
*/
function Slider(element, options) {
_classCallCheck(this, Slider);
var _this = _possibleConstructorReturn(this, (Slider.__proto__ || Object.getPrototypeOf(Slider)).call(this, element, options));
_this._changeState = function (state, detail, callback) {
callback();
};
_this.sliderActive = false;
_this.dragging = false;
_this.track = _this.element.querySelector(_this.options.selectorTrack);
_this.filledTrack = _this.element.querySelector(_this.options.selectorFilledTrack);
_this.thumb = _this.element.querySelector(_this.options.selectorThumb);
_this.input = _this.element.querySelector(_this.options.selectorInput);
if (_this.element.dataset.sliderInputBox) {
_this.boundInput = _this.element.ownerDocument.querySelector(_this.element.dataset.sliderInputBox);
_this._updateInput();
_this.manage(on(_this.boundInput, 'change', function (evt) {
_this.setValue(evt.target.value);
}));
_this.manage(on(_this.boundInput, 'focus', function (evt) {
evt.target.select();
}));
// workaround for safari
_this.manage(on(_this.boundInput, 'mouseup', function (evt) {
evt.preventDefault();
}));
}
_this._updatePosition();
_this.manage(on(_this.thumb, 'mousedown', function () {
_this.sliderActive = true;
}));
_this.manage(on(_this.element.ownerDocument, 'mouseup', function () {
_this.sliderActive = false;
}));
_this.manage(on(_this.element.ownerDocument, 'mousemove', function (evt) {
var disabled = _this.element.classList.contains(_this.options.classDisabled);
if (_this.sliderActive === true && !disabled) {
_this._updatePosition(evt);
}
}));
_this.manage(on(_this.thumb, 'keydown', function (evt) {
var disabled = _this.element.classList.contains(_this.options.classDisabled);
if (!disabled) {
_this._updatePosition(evt);
}
}));
_this.manage(on(_this.track, 'click', function (evt) {
var disabled = _this.element.classList.contains(_this.options.classDisabled);
if (!disabled) {
_this._updatePosition(evt);
}
}));
return _this;
}
_createClass(Slider, [{
key: '_updatePosition',
value: function _updatePosition(evt) {
var _this2 = this;
var _calcValue2 = this._calcValue(evt),
left = _calcValue2.left,
newValue = _calcValue2.newValue;
if (this.dragging) {
return;
}
this.dragging = true;
requestAnimationFrame(function () {
_this2.dragging = false;
_this2.thumb.style.left = left + '%';
_this2.filledTrack.style.transform = 'translate(0%, -50%) scaleX(' + left / 100 + ')';
_this2.input.value = newValue;
_this2._updateInput();
_this2.changeState('slider-value-change', { value: newValue });
});
}
}, {
key: '_calcValue',
value: function _calcValue(evt) {
var _getInputProps = this.getInputProps(),
value = _getInputProps.value,
min = _getInputProps.min,
max = _getInputProps.max,
step = _getInputProps.step;
var range = max - min;
var valuePercentage = (value - min) / range * 100;
var left = void 0;
var newValue = void 0;
left = valuePercentage;
newValue = value;
if (evt) {
var type = evt.type;
if (type === 'keydown') {
var direction = {
40: -1, // decreasing
37: -1, // decreasing
38: 1, // increasing
39: 1 // increasing
}[evt.which];
if (direction !== undefined) {
var multiplier = evt.shiftKey === true ? range / step / this.options.stepMultiplier : 1;
var stepMultiplied = step * multiplier;
var stepSize = stepMultiplied / range * 100;
left = valuePercentage + stepSize * direction;
newValue = Number(value) + stepMultiplied * direction;
}
}
if (type === 'mousemove' || type === 'click') {
if (type === 'click') {
this.element.querySelector(this.options.selectorThumb).classList.add(this.options.classThumbClicked);
} else {
this.element.querySelector(this.options.selectorThumb).classList.remove(this.options.classThumbClicked);
}
var track = this.track.getBoundingClientRect();
var unrounded = (evt.clientX - track.left) / track.width;
var rounded = Math.round(range * unrounded / step) * step;
left = rounded / range * 100;
newValue = rounded + min;
}
}
if (newValue <= Number(min)) {
left = 0;
newValue = min;
}
if (newValue >= Number(max)) {
left = 100;
newValue = max;
}
return { left: left, newValue: newValue };
}
}, {
key: '_updateInput',
value: function _updateInput() {
if (this.boundInput) {
this.boundInput.value = this.input.value;
}
}
}, {
key: 'getInputProps',
value: function getInputProps() {
var values = {
value: Number(this.input.value),
min: Number(this.input.min),
max: Number(this.input.max),
step: this.input.step ? Number(this.input.step) : 1
};
return values;
}
}, {
key: 'setValue',
value: function setValue(value) {
this.input.value = value;
this._updatePosition();
}
}, {
key: 'stepUp',
value: function stepUp() {
this.input.stepUp();
this._updatePosition();
}
}, {
key: 'stepDown',
value: function stepDown() {
this.input.stepDown();
this._updatePosition();
}
/**
* The map associating DOM element and Slider UI instance.
* @type {WeakMap}
*/
}], [{
key: 'options',
/**
* The component options.
* If `options` is specified in the constructor,
* properties in this object are overriden for the instance being created.
* @property {string} selectorInit The CSS selector to find slider instances.
*/
get: function get() {
var prefix = settings.prefix;
return {
selectorInit: '[data-slider]',
selectorTrack: '.' + prefix + '--slider__track',
selectorFilledTrack: '.' + prefix + '--slider__filled-track',
selectorThumb: '.' + prefix + '--slider__thumb',
selectorInput: '.' + prefix + '--slider__input',
classDisabled: prefix + '--slider--disabled',
classThumbClicked: prefix + '--slider__thumb--clicked',
eventBeforeSliderValueChange: 'slider-before-value-change',
eventAfterSliderValueChange: 'slider-after-value-change',
stepMultiplier: 4
};
}
}]);
return Slider;
}(mixin(createComponent, initComponentBySearch, eventedState, handles));
Slider.components = new WeakMap();
export default Slider;