/** * Defines a common abstract parent class for all D3 interactions. */Ext.define('Ext.d3.interaction.Abstract', { isInteraction: true, mixins: { observable: 'Ext.mixin.Observable' }, statics: { /** * @private * Map of components to locked events on those components, e.g.: * * { * componentId: { * drag: true, * pinch: true * } * } */ lockedEvents: {} }, config: { /** * @cfg {Ext.d3.Component} component * The interaction will listen for gestures on this component's element. */ component: null, /** * @cfg {Object} gestures * Maps gestures that should be used for starting/maintaining/ending * the interaction to corresponding class methods. For example: * * gestures: { * tap: 'onGesture' * } * * It is also possible to override the default getter for the `gestures` * config, that will derive gestures to be used based on other configs' values. * For example, a subclass can define: * * getGestures: function () { * var someConfig = this.getSomeConfig(), * gestures = {}; * * gestures[someConfig.gesture] = 'onGesture'; * * return gestures; * } * */ gestures: null, /** * @cfg {Boolean} [enabled=true] `true` if the interaction is enabled. */ enabled: true }, /** * @private * Class names or namespaces of supported components, e.g.: * Ext.d3 * Ext.d3.hierarchy.Pack */ supports: [], listeners: null, constructor: function (config) { var me = this, id; config = config || {}; if ('id' in config) { id = config.id; } else if ('id' in me.config) { id = me.config.id; } else { id = me.getId(); } me.setId(id); me.mixins.observable.constructor.call(me, config); }, resetComponent: function () { var me = this, component = me.getComponent(); if (!me.isConfiguring) { me.setComponent(null); me.setGestures(null); me.setComponent(component); } }, updateComponent: function (component, oldComponent) { var me = this; if (oldComponent === component) { return; } if (oldComponent) { me.removeComponent(oldComponent); } if (component) { me.addComponent(component); } }, addComponent: function (component) { component.register(this); this.component = component; this.addElementListener(component.element); }, removeComponent: function (component) { this.removeElementListener(component.element); this.component = null; component.unregister(this); }, updateEnabled: function (enabled) { var me = this, component = me.getComponent(); if (component) { if (enabled) { me.addElementListener(component.element); } else { me.removeElementListener(component.element); } } }, /** * @method * @protected * Placeholder method. */ onGesture: Ext.emptyFn, /** * @private */ addElementListener: function (element) { var me = this, gestures = me.getGestures(), locks = me.getLocks(), name; if (!me.getEnabled()) { return; } function addGesture(name, fn) { if (!Ext.isFunction(fn)) { fn = me[fn]; } element.on( name, me.listeners[name] = function (e) { if (me.getEnabled() && (!(name in locks) || locks[name] === me)) { var result = fn.apply(this, arguments); if (result === false && e && e.stopPropagation) { e.stopPropagation(); } return result; } }, me ); } me.listeners = me.listeners || {}; for (name in gestures) { addGesture(name, gestures[name]); } }, removeElementListener: function (element) { var me = this, gestures = me.getGestures(), name; function removeGesture(name) { var fn = me.listeners[name]; if (fn) { element.un(name, fn); delete me.listeners[name]; } } if (me.listeners) { for (name in gestures) { removeGesture(name); } } }, lockEvents: function () { var me = this, locks = me.getLocks(), args = Array.prototype.slice.call(arguments), i = args.length; while (i--) { locks[args[i]] = me; } }, unlockEvents: function () { var locks = this.getLocks(), args = Array.prototype.slice.call(arguments), i = args.length; while (i--) { delete locks[args[i]]; } }, getLocks: function () { return this.statics().lockedEvents; }, destroy: function () { var me = this; me.setComponent(null); me.listeners = null; me.callParent(); } });