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<pre class="prettyprint lang-js"><span id='Ext-dd-DragZone-method-constructor'><span id='Ext-dd-DragZone'>/**
</span></span> * @class Ext.dd.DragZone
* @extends Ext.dd.DragSource
* <p>This class provides a container DD instance that allows dragging of multiple child source nodes.</p>
* <p>This class does not move the drag target nodes, but a proxy element which may contain
* any DOM structure you wish. The DOM element to show in the proxy is provided by either a
* provided implementation of {@link #getDragData}, or by registered draggables registered with {@link Ext.dd.Registry}</p>
* <p>If you wish to provide draggability for an arbitrary number of DOM nodes, each of which represent some
* application object (For example nodes in a {@link Ext.DataView DataView}) then use of this class
* is the most efficient way to "activate" those nodes.</p>
* <p>By default, this class requires that draggable child nodes are registered with {@link Ext.dd.Registry}.
* However a simpler way to allow a DragZone to manage any number of draggable elements is to configure
* the DragZone with an implementation of the {@link #getDragData} method which interrogates the passed
* mouse event to see if it has taken place within an element, or class of elements. This is easily done
* by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
* {@link Ext.DomQuery} selector. For example, to make the nodes of a DataView draggable, use the following
* technique. Knowledge of the use of the DataView is required:</p><pre><code>
myDataView.on('render', function(v) {
myDataView.dragZone = new Ext.dd.DragZone(v.getEl(), {
// On receipt of a mousedown event, see if it is within a DataView node.
// Return a drag data object if so.
getDragData: function(e) {
// Use the DataView's own itemSelector (a mandatory property) to
// test if the mousedown is within one of the DataView's nodes.
var sourceEl = e.getTarget(v.itemSelector, 10);
// If the mousedown is within a DataView node, clone the node to produce
// a ddel element for use by the drag proxy. Also add application data
// to the returned data object.
if (sourceEl) {
d = sourceEl.cloneNode(true);
d.id = Ext.id();
return {
ddel: d,
sourceEl: sourceEl,
repairXY: Ext.fly(sourceEl).getXY(),
sourceStore: v.store,
draggedRecord: v.{@link Ext.DataView#getRecord getRecord}(sourceEl)
}
}
},
// Provide coordinates for the proxy to slide back to on failed drag.
// This is the original XY coordinates of the draggable element captured
// in the getDragData method.
getRepairXY: function() {
return this.dragData.repairXY;
}
});
});</code></pre>
* See the {@link Ext.dd.DropZone DropZone} documentation for details about building a DropZone which
* cooperates with this DragZone.
* @constructor
* @param {Mixed} el The container element
* @param {Object} config
*/
Ext.dd.DragZone = Ext.extend(Ext.dd.DragSource, {
constructor : function(el, config){
Ext.dd.DragZone.superclass.constructor.call(this, el, config);
if(this.containerScroll){
Ext.dd.ScrollManager.register(this.el);
}
},
<span id='Ext-dd-DragZone-property-dragData'> /**
</span> * This property contains the data representing the dragged object. This data is set up by the implementation
* of the {@link #getDragData} method. It must contain a <tt>ddel</tt> property, but can contain
* any other data according to the application's needs.
* @type Object
* @property dragData
*/
<span id='Ext-dd-DragZone-cfg-containerScroll'> /**
</span> * @cfg {Boolean} containerScroll True to register this container with the Scrollmanager
* for auto scrolling during drag operations.
*/
<span id='Ext-dd-DragZone-cfg-hlColor'> /**
</span> * @cfg {String} hlColor The color to use when visually highlighting the drag source in the afterRepair
* method after a failed drop (defaults to "c3daf9" - light blue)
*/
<span id='Ext-dd-DragZone-method-getDragData'> /**
</span> * Called when a mousedown occurs in this container. Looks in {@link Ext.dd.Registry}
* for a valid target to drag based on the mouse down. Override this method
* to provide your own lookup logic (e.g. finding a child by class name). Make sure your returned
* object has a "ddel" attribute (with an HTML Element) for other functions to work.
* @param {EventObject} e The mouse down event
* @return {Object} The dragData
*/
getDragData : function(e){
return Ext.dd.Registry.getHandleFromEvent(e);
},
<span id='Ext-dd-DragZone-method-onInitDrag'> /**
</span> * Called once drag threshold has been reached to initialize the proxy element. By default, it clones the
* this.dragData.ddel
* @param {Number} x The x position of the click on the dragged object
* @param {Number} y The y position of the click on the dragged object
* @return {Boolean} true to continue the drag, false to cancel
*/
onInitDrag : function(x, y){
this.proxy.update(this.dragData.ddel.cloneNode(true));
this.onStartDrag(x, y);
return true;
},
<span id='Ext-dd-DragZone-method-afterRepair'> /**
</span> * Called after a repair of an invalid drop. By default, highlights this.dragData.ddel
*/
afterRepair : function(){
if(Ext.enableFx){
Ext.Element.fly(this.dragData.ddel).highlight(this.hlColor || "c3daf9");
}
this.dragging = false;
},
<span id='Ext-dd-DragZone-method-getRepairXY'> /**
</span> * Called before a repair of an invalid drop to get the XY to animate to. By default returns
* the XY of this.dragData.ddel
* @param {EventObject} e The mouse up event
* @return {Array} The xy location (e.g. [100, 200])
*/
getRepairXY : function(e){
return Ext.Element.fly(this.dragData.ddel).getXY();
},
<span id='Ext-dd-DragZone-method-destroy'> destroy : function(){
</span> Ext.dd.DragZone.superclass.destroy.call(this);
if(this.containerScroll){
Ext.dd.ScrollManager.unregister(this.el);
}
}
});</pre>
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