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| import Ember from 'ember';
import layout from '../templates/components/aria-slider-thumb';
const {
Component,
computed
} = Ember;
const RAIL_WIDTH = 300;
const THUMB_WIDTH = 8;
const KEYCODES = {
'left': 37,
'up': 38,
'right': 39,
'down': 40,
'pageUp': 33,
'pageDown': 34,
'end': 35,
'home': 36
};
export default Component.extend({
layout,
classNames: ['thumb'],
classNameBindings: ['focusClass:focus'],
attributeBindings: [
'currentValue:aria-valuenow',
'label:aria-label',
'maxValue:aria-valuemax',
'minValue:aria-valuemin',
'role',
'src',
'tabindex',
'valueText:aria-valuetext',
'labelledBy:aria-labelledby'
],
role: 'slider',
tabindex: 0,
focusClass: false,
valueText: computed('currentValue', function() {
let units = this.get('units') || '';
let _valueText = `${this.get('currentValue')}${units}`;
if(this.get('unitPrefix')){
_valueText = `${units}${this.get('currentValue')}`;
}
return _valueText;
}),
keyDown(event) {
var flag = false;
let currentVal = this.get('currentValue');
switch (event.keyCode) {
case KEYCODES.left:
case KEYCODES.down:
this.moveSliderTo(currentVal - 1);
flag = true;
break;
case KEYCODES.right:
case KEYCODES.up:
this.moveSliderTo(currentVal + 1);
flag = true;
break;
case KEYCODES.pageDown:
this.moveSliderTo(currentVal - 10);
flag = true;
break;
case KEYCODES.pageUp:
this.moveSliderTo(currentVal + 10);
flag = true;
break;
case KEYCODES.home:
this.moveSliderTo(this.get('minValue'));
flag = true;
break;
case KEYCODES.end:
this.moveSliderTo(this.get('maxValue'));
flag = true;
break;
default:
break;
}
if (flag) {
event.preventDefault();
event.stopPropagation();
}
},
mouseDown(e) {
let parentNode = e.target.parentNode;
let minValue = this.get('minValue');
let maxValue = this.get('maxValue');
let handleMouseMove = (event) => {
let diffX = event.pageX - parentNode.offsetLeft;
let valueNow = minValue + parseInt(((maxValue - minValue) * diffX) / RAIL_WIDTH);
this.moveSliderTo(valueNow);
event.preventDefault();
event.stopPropagation();
};
var handleMouseUp = function() {
document.removeEventListener('mousemove', handleMouseMove);
document.removeEventListener('mouseup', handleMouseUp);
};
// bind a mousemove event handler to move pointer
document.addEventListener('mousemove', handleMouseMove);
// bind a mouseup event handler to stop tracking mouse movements
document.addEventListener('mouseup', handleMouseUp);
e.preventDefault();
e.stopPropagation();
// Set focus to the clicked handle
e.target.focus();
},
focusIn() {
this.set('focusClass', true);
},
focusOut() {
this.set('focusClass', false);
},
init() {
this._super(...arguments);
},
didRender() {
this.moveSliderTo(this.get('currentValue'));
},
moveSliderTo(value) {
let minValue = this.get('minValue');
let maxValue = this.get('maxValue');
let _value = value;
if (value < minValue) {
_value = minValue;
}
if ( value > maxValue) {
_value = maxValue;
}
this.set('currentValue', _value);
if(value < minValue || value > maxValue) {
return;
}
let pos = Math.round((_value * RAIL_WIDTH) / (maxValue - minValue)) - (THUMB_WIDTH / 2);
// console.log("pos = ", pos);
let left = '';
left = pos + 'px';
// console.log("left = ", left);
this.$().css('left', left);
}
});
|