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# Class Ext.dd.DragDropMgr

Package: | Ext.dd
Defined In: | DDCore.js
Class: | DragDropMgr
Extends: | Object

DragDropMgr is a singleton that tracks the element interaction for all DragDrop items in the window. Generally, you will not call this class directly, but it does have helper methods that could be useful in your DragDrop implementations.
This class is a singleton and cannot be created directly.

## Public Properties

Property | Defined By
--- | ---
| INTERSECT : int In intersect mode, drag and drop interaction is defined by the overlap of two or more drag and drop objects. | DragDropMgr
| POINT : int In point mode, drag and drop interaction is defined by the location of the cursor during the drag/drop | DragDropMgr
| clickPixelThresh : int The number of pixels that the mouse needs to move after the mousedown before the drag is initiated. Default=3; | DragDropMgr
| clickTimeThresh : int The number of milliseconds after the mousedown event to initiate the drag if we don't get a mouseup event. Default=35... The number of milliseconds after the mousedown event to initiate the drag if we don't get a mouseup event. Default=350 | DragDropMgr
| mode : int The current drag and drop mode. Default: POINT | DragDropMgr
| preventDefault : boolean Flag to determine if we should prevent the default behavior of the events we define. By default this is true, but thi... Flag to determine if we should prevent the default behavior of the events we define. By default this is true, but this can be set to false if you need the default behavior (not recommended) | DragDropMgr
| stopPropagation : boolean Flag to determine if we should stop the propagation of the events we generate. This is true by default but you may wa... Flag to determine if we should stop the propagation of the events we generate. This is true by default but you may want to set it to false if the html element contains other features that require the mouse click. | DragDropMgr
| useCache : boolean Set useCache to false if you want to force object the lookup of each drag and drop linked element constantly during a... Set useCache to false if you want to force object the lookup of each drag and drop linked element constantly during a drag. | DragDropMgr

## Public Methods

Method | Defined By
--- | ---
| getBestMatch( `DragDrop[] dds` ) : DragDrop <static> Helper function for getting the best match from the list of drag and drop objects returned by the drag and drop event... <static> Helper function for getting the best match from the list of drag and drop objects returned by the drag and drop events when we are in INTERSECT mode. It returns either the first object that the cursor is over, or the object that has the greatest overlap with the dragged element. Parameters: `dds` : DragDrop[] The array of drag and drop objects targeted Returns: `DragDrop` The best single match | DragDropMgr
| getCss( `String id` ) : Object <static> Returns the style property for the DOM element (i.e., document.getElById(id).style) <static> Returns the style property for the DOM element (i.e., document.getElById(id).style) Parameters: `id` : String the id of the elment to get Returns: `Object` The style property of the element | DragDropMgr
| getDDById( `String id` ) : DragDrop <static> Returns the DragDrop instance for a given id <static> Returns the DragDrop instance for a given id Parameters: `id` : String the id of the DragDrop object Returns: `DragDrop` the drag drop object, null if it is not found | DragDropMgr
| getElement( `String id` ) : Object <static> Returns the actual DOM element <static> Returns the actual DOM element Parameters: `id` : String the id of the elment to get Returns: `Object` The element | DragDropMgr
| getLocation( `DragDrop oDD` ) : Ext.lib.Region <static> Returns a Region object containing the drag and drop element's position and size, including the padding configured fo... <static> Returns a Region object containing the drag and drop element's position and size, including the padding configured for it Parameters: `oDD` : DragDrop the drag and drop object to get the location for Returns: `Ext.lib.Region` a Region object representing the total area the element occupies, including any padding the instance is configured for. | DragDropMgr
| getRelated( `DragDrop p_oDD`, `boolean bTargetsOnly` ) : DragDrop[] <static> Returns the drag and drop instances that are in all groups the passed in instance belongs to. <static> Returns the drag and drop instances that are in all groups the passed in instance belongs to. Parameters: `p_oDD` : DragDrop the obj to get related data for `bTargetsOnly` : boolean if true, only return targetable objs Returns: `DragDrop[]` the related instances | DragDropMgr
| isDragDrop( `String id` ) : boolean <static> Utility function to determine if a given element has been registered as a drag drop item. <static> Utility function to determine if a given element has been registered as a drag drop item. Parameters: `id` : String the element id to check Returns: `boolean` true if this element is a DragDrop item, false otherwise | DragDropMgr
| isHandle( `String id` ) : boolean <static> Utility function to determine if a given element has been registered as a drag drop handle for the given Drag Drop ob... <static> Utility function to determine if a given element has been registered as a drag drop handle for the given Drag Drop object. Parameters: `id` : String the element id to check Returns: `boolean` true if this element is a DragDrop handle, false otherwise | DragDropMgr
| isLegalTarget( `DragDrop oDD`, `DragDrop oTargetDD` ) : boolean <static> Returns true if the specified dd target is a legal target for the specifice drag obj <static> Returns true if the specified dd target is a legal target for the specifice drag obj Parameters: `oDD` : DragDrop the drag obj `oTargetDD` : DragDrop the target Returns: `boolean` true if the target is a legal target for the dd obj | DragDropMgr
| isLocked() : boolean <static> Is drag and drop locked? <static> Is drag and drop locked? Parameters: None. Returns: `boolean` True if drag and drop is locked, false otherwise. | DragDropMgr
| isTypeOfDD( `Object the` ) : boolean <static> My goal is to be able to transparently determine if an object is typeof DragDrop, and the exact subclass of DragDrop.... <static> My goal is to be able to transparently determine if an object is typeof DragDrop, and the exact subclass of DragDrop. typeof returns "object", oDD.constructor.toString() always returns "DragDrop" and not the name of the subclass. So for now it just evaluates a well-known variable in DragDrop. Parameters: `the` : Object object to evaluate Returns: `boolean` true if typeof oDD = DragDrop | DragDropMgr
| lock() : void <static> Lock all drag and drop functionality <static> Lock all drag and drop functionality Parameters: None. Returns: void | DragDropMgr
| refreshCache( `Object groups` ) : void <static> Refreshes the cache of the top-left and bottom-right points of the drag and drop objects in the specified group(s). ... <static> Refreshes the cache of the top-left and bottom-right points of the drag and drop objects in the specified group(s). This is in the format that is stored in the drag and drop instance, so typical usage is: `Ext.dd.DragDropMgr.refreshCache(ddinstance.groups);` Alternatively: `Ext.dd.DragDropMgr.refreshCache({group1:true, group2:true});` Parameters: `groups` : Object an associative array of groups to refresh Returns: void | DragDropMgr
| regDragDrop( `DragDrop oDD`, `String sGroup` ) : void <static> Each DragDrop instance must be registered with the DragDropMgr. This is executed in DragDrop.init() <static> Each DragDrop instance must be registered with the DragDropMgr. This is executed in DragDrop.init() Parameters: `oDD` : DragDrop the DragDrop object to register `sGroup` : String the name of the group this element belongs to Returns: void | DragDropMgr
| regHandle( `String sDDId`, `String sHandleId` ) : void <static> Each DragDrop handle element must be registered. This is done automatically when executing DragDrop.setHandleElId() <static> Each DragDrop handle element must be registered. This is done automatically when executing DragDrop.setHandleElId() Parameters: `sDDId` : String the DragDrop id this element is a handle for `sHandleId` : String the id of the element that is the drag handle Returns: void | DragDropMgr
| startDrag( `x {int}`, `y {int}` ) : void <static> Fired when either the drag pixel threshol or the mousedown hold time threshold has been met. <static> Fired when either the drag pixel threshol or the mousedown hold time threshold has been met. Parameters: `{int}` : x the X position of the original mousedown `{int}` : y the Y position of the original mousedown Returns: void | DragDropMgr
| stopEvent( `Event e` ) : void <static> Utility to stop event propagation and event default, if these features are turned on. <static> Utility to stop event propagation and event default, if these features are turned on. Parameters: `e` : Event the event as returned by this.getEvent() Returns: void | DragDropMgr
| unlock() : void <static> Unlock all drag and drop functionality <static> Unlock all drag and drop functionality Parameters: None. Returns: void | DragDropMgr
| verifyEl( `HTMLElement el` ) : boolean <static> This checks to make sure an element exists and is in the DOM. The main purpose is to handle cases where innerHTML is... <static> This checks to make sure an element exists and is in the DOM. The main purpose is to handle cases where innerHTML is used to remove drag and drop objects from the DOM. IE provides an 'unspecified error' when trying to access the offsetParent of such an element Parameters: `el` : HTMLElement the element to check Returns: `boolean` true if the element looks usable | DragDropMgr

## Public Events

This class has no public events.