/** * A private utility class used by Ext.Carousel to create indicators. * @private */Ext.define('Ext.carousel.Indicator', { extend: 'Ext.Component', xtype: 'carouselindicator', config: { /** * @cfg * @inheritdoc */ baseCls: Ext.baseCSSPrefix + 'carousel-indicator', direction: 'horizontal' }, /** * @event previous * Fires when this indicator is tapped on the left half * @param {Ext.carousel.Indicator} this */ /** * @event next * Fires when this indicator is tapped on the right half * @param {Ext.carousel.Indicator} this */ initialize: function() { this.callParent(); this.indicators = []; this.element.on({ tap: 'onTap', scope: this }); }, updateDirection: function(newDirection, oldDirection) { var baseCls = this.getBaseCls(); this.element.replaceCls(oldDirection, newDirection, baseCls); if (newDirection === 'horizontal') { this.setBottom(0); this.setRight(null); } else { this.setRight(0); this.setBottom(null); } }, addIndicator: function() { this.indicators.push(this.element.createChild({ tag: 'span' })); }, removeIndicator: function() { var indicators = this.indicators; if (indicators.length > 0) { indicators.pop().destroy(); } }, setActiveIndex: function(index) { var indicators = this.indicators, currentActiveIndex = this.activeIndex, currentActiveItem = indicators[currentActiveIndex], activeItem = indicators[index], baseCls = this.getBaseCls(); if (currentActiveItem) { currentActiveItem.removeCls(baseCls, null, 'active'); } if (activeItem) { activeItem.addCls(baseCls, null, 'active'); } this.activeIndex = index; return this; }, /** * @private */ onTap: function(e) { var touch = e.touch, box = this.element.getBox(), centerX = box.left + (box.width / 2), centerY = box.top + (box.height / 2), direction = this.getDirection(); if ((direction === 'horizontal' && touch.pageX >= centerX) || (direction === 'vertical' && touch.pageY >= centerY)) { this.fireEvent('next', this); } else { this.fireEvent('previous', this); } }, doDestroy: function() { var indicators = this.indicators, i, ln, indicator; for (i = 0,ln = indicators.length; i < ln; i++) { indicator = indicators[i]; indicator.destroy(); } indicators.length = 0; this.callParent(); }});