Current Path : C:/xampp/htdocs/moodle/lib/yuilib/3.17.2/dd-plugin/ |
Current File : C:/xampp/htdocs/moodle/lib/yuilib/3.17.2/dd-plugin/dd-plugin-debug.js |
/* YUI 3.17.2 (build 9c3c78e) Copyright 2014 Yahoo! Inc. All rights reserved. Licensed under the BSD License. http://yuilibrary.com/license/ */ YUI.add('dd-plugin', function (Y, NAME) { /** * Simple Drag plugin that can be attached to a Node or Widget via the plug method. * @module dd * @submodule dd-plugin */ /** * Simple Drag plugin that can be attached to a Node or Widget via the plug method. * @class Drag * @extends DD.Drag * @constructor * @namespace Plugin */ var Drag = function(config) { if (Y.Widget && config.host instanceof Y.Widget) { config.node = config.host.get('boundingBox'); config.widget = config.host; } else { config.node = config.host; config.widget = false; } Drag.superclass.constructor.call(this, config); }, EV_START = 'drag:start', EV_DRAG = 'drag:drag', EV_DRAG_END = 'drag:end'; /** * dd-plugin * @property NAME * @type {String} */ Drag.NAME = "dd-plugin"; /** * The Drag instance will be placed on the Node instance under the dd namespace. It can be accessed via Node.dd; * @property NS * @type {String} */ Drag.NS = "dd"; Y.extend(Drag, Y.DD.Drag, { _widgetHandles: null, /** * refers to a Y.Widget if its the host, otherwise = false. * * @attribute _widget * @private */ _widget: undefined, /** * refers to the [x,y] coordinate where the drag was stopped last * * @attribute _stoppedPosition * @private */ _stoppedPosition: undefined, /** * Returns true if widget uses widgetPosition, otherwise returns false * * @method _usesWidgetPosition * @private */ _usesWidgetPosition: function(widget) { var r = false; if (widget) { r = (widget.hasImpl && widget.hasImpl(Y.WidgetPosition)) ? true : false; } return r; }, /** * Attached to the `drag:start` event, it checks if this plugin needs * to attach or detach listeners for widgets. If `dd-proxy` is plugged * the default widget positioning should be ignored. * @method _checkEvents * @private */ _checkEvents: function() { Y.log('Checking for widget events', 'info', 'dd-plugin'); if (this._widget) { //It's a widget if (this.proxy) { //It's a proxy if (this._widgetHandles.length > 0) { Y.log('Proxy is plugged, remove events', 'info', 'dd-plugin'); //Remove Listeners this._removeWidgetListeners(); } } else { if (this._widgetHandles.length === 0) { Y.log('Proxy is not plugged, attach events', 'info', 'dd-plugin'); this._attachWidgetListeners(); } } } }, /** * Remove the attached widget listeners * @method _removeWidgetListeners * @private */ _removeWidgetListeners: function() { Y.log('Detaching widget events', 'info', 'dd-plugin'); Y.Array.each(this._widgetHandles, function(handle) { handle.detach(); }); this._widgetHandles = []; }, /** * If this is a Widget, then attach the positioning listeners * @method _attachWidgetListeners * @private */ _attachWidgetListeners: function() { //if this thing is a widget, and it uses widgetposition... if (this._usesWidgetPosition(this._widget)) { Y.log('Attaching widget events', 'info', 'dd-plugin'); //set the x,y on the widget's ATTRS this._widgetHandles.push(this.on(EV_DRAG, this._setWidgetCoords)); //store the new position that the widget ends up on this._widgetHandles.push(this.on(EV_DRAG_END, this._updateStopPosition)); } }, /** * Sets up event listeners on drag events if interacting with a widget * * @method initializer * @protected */ initializer: function(config) { this._widgetHandles = []; this._widget = config.widget; this.on(EV_START, this._checkEvents); //Always run, don't check this._attachWidgetListeners(); }, /** * Updates x,y or xy attributes on widget based on where the widget is dragged * * @method initializer * @param {EventFacade} e Event Facade * @private */ _setWidgetCoords: function(e) { //get the last position where the widget was, or get the starting point var nodeXY = this._stoppedPosition || e.target.nodeXY, realXY = e.target.realXY, //amount moved = [(x2 - x1) , (y2 - y1)] movedXY = [realXY[0] - nodeXY[0], realXY[1] - nodeXY[1]]; //if both have changed.. if (movedXY[0] !== 0 && movedXY[1] !== 0) { this._widget.set('xy', realXY); } //if only x is 0, set the Y else if (movedXY[0] === 0) { this._widget.set('y',realXY[1]); } //otherwise, y is 0, so set X else if (movedXY[1] === 0){ this._widget.set('x', realXY[0]); } }, /** * Updates the last position where the widget was stopped. * * @method _updateStopPosition * @param {EventFacade} e Event Facade * @private */ _updateStopPosition: function(e) { this._stoppedPosition = e.target.realXY; } }); Y.namespace('Plugin'); Y.Plugin.Drag = Drag; }, '3.17.2', {"optional": ["dd-constrain", "dd-proxy"], "requires": ["dd-drag"]});