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+ <pre class="prettyprint lang-js"><span id='Ext-view-DropZone'>/**
+</span> * @class Ext.view.DropZone
+ * @extends Ext.dd.DropZone
+ * @private
+ */
+Ext.define('Ext.view.DropZone', {
+ extend: 'Ext.dd.DropZone',
+
+ indicatorHtml: '<div class="x-grid-drop-indicator-left"></div><div class="x-grid-drop-indicator-right"></div>',
+ indicatorCls: 'x-grid-drop-indicator',
+
+ constructor: function(config) {
+ var me = this;
+ Ext.apply(me, config);
+
+ // Create a ddGroup unless one has been configured.
+ // User configuration of ddGroups allows users to specify which
+ // DD instances can interact with each other. Using one
+ // based on the id of the View would isolate it and mean it can only
+ // interact with a DragZone on the same View also using a generated ID.
+ if (!me.ddGroup) {
+ me.ddGroup = 'view-dd-zone-' + me.view.id;
+ }
+
+ // The DropZone's encapsulating element is the View's main element. It must be this because drop gestures
+ // may require scrolling on hover near a scrolling boundary. In Ext 4.x two DD instances may not use the
+ // same element, so a DragZone on this same View must use the View's parent element as its element.
+ me.callParent([me.view.el]);
+ },
+
+// Fire an event through the client DataView. Lock this DropZone during the event processing so that
+// its data does not become corrupted by processing mouse events.
+ fireViewEvent: function() {
+ var me = this,
+ result;
+
+ me.lock();
+ result = me.view.fireEvent.apply(me.view, arguments);
+ me.unlock();
+ return result;
+ },
+
+ getTargetFromEvent : function(e) {
+ var node = e.getTarget(this.view.getItemSelector()),
+ mouseY, nodeList, testNode, i, len, box;
+
+// Not over a row node: The content may be narrower than the View's encapsulating element, so return the closest.
+// If we fall through because the mouse is below the nodes (or there are no nodes), we'll get an onContainerOver call.
+ if (!node) {
+ mouseY = e.getPageY();
+ for (i = 0, nodeList = this.view.getNodes(), len = nodeList.length; i < len; i++) {
+ testNode = nodeList[i];
+ box = Ext.fly(testNode).getBox();
+ if (mouseY <= box.bottom) {
+ return testNode;
+ }
+ }
+ }
+ return node;
+ },
+
+ getIndicator: function() {
+ var me = this;
+
+ if (!me.indicator) {
+ me.indicator = Ext.createWidget('component', {
+ html: me.indicatorHtml,
+ cls: me.indicatorCls,
+ ownerCt: me.view,
+ floating: true,
+ shadow: false
+ });
+ }
+ return me.indicator;
+ },
+
+ getPosition: function(e, node) {
+ var y = e.getXY()[1],
+ region = Ext.fly(node).getRegion(),
+ pos;
+
+ if ((region.bottom - y) >= (region.bottom - region.top) / 2) {
+ pos = "before";
+ } else {
+ pos = "after";
+ }
+ return pos;
+ },
+
+<span id='Ext-view-DropZone-method-containsRecordAtOffset'> /**
+</span> * @private Determines whether the record at the specified offset from the passed record
+ * is in the drag payload.
+ * @param records
+ * @param record
+ * @param offset
+ * @returns {Boolean} True if the targeted record is in the drag payload
+ */
+ containsRecordAtOffset: function(records, record, offset) {
+ if (!record) {
+ return false;
+ }
+ var view = this.view,
+ recordIndex = view.indexOf(record),
+ nodeBefore = view.getNode(recordIndex + offset),
+ recordBefore = nodeBefore ? view.getRecord(nodeBefore) : null;
+
+ return recordBefore && Ext.Array.contains(records, recordBefore);
+ },
+
+ positionIndicator: function(node, data, e) {
+ var me = this,
+ view = me.view,
+ pos = me.getPosition(e, node),
+ overRecord = view.getRecord(node),
+ draggingRecords = data.records,
+ indicator, indicatorY;
+
+ if (!Ext.Array.contains(draggingRecords, overRecord) && (
+ pos == 'before' && !me.containsRecordAtOffset(draggingRecords, overRecord, -1) ||
+ pos == 'after' && !me.containsRecordAtOffset(draggingRecords, overRecord, 1)
+ )) {
+ me.valid = true;
+
+ if (me.overRecord != overRecord || me.currentPosition != pos) {
+
+ indicatorY = Ext.fly(node).getY() - view.el.getY() - 1;
+ if (pos == 'after') {
+ indicatorY += Ext.fly(node).getHeight();
+ }
+ me.getIndicator().setWidth(Ext.fly(view.el).getWidth()).showAt(0, indicatorY);
+
+ // Cache the overRecord and the 'before' or 'after' indicator.
+ me.overRecord = overRecord;
+ me.currentPosition = pos;
+ }
+ } else {
+ me.invalidateDrop();
+ }
+ },
+
+ invalidateDrop: function() {
+ if (this.valid) {
+ this.valid = false;
+ this.getIndicator().hide();
+ }
+ },
+
+ // The mouse is over a View node
+ onNodeOver: function(node, dragZone, e, data) {
+ var me = this;
+
+ if (!Ext.Array.contains(data.records, me.view.getRecord(node))) {
+ me.positionIndicator(node, data, e);
+ }
+ return me.valid ? me.dropAllowed : me.dropNotAllowed;
+ },
+
+ // Moved out of the DropZone without dropping.
+ // Remove drop position indicator
+ notifyOut: function(node, dragZone, e, data) {
+ var me = this;
+
+ me.callParent(arguments);
+ delete me.overRecord;
+ delete me.currentPosition;
+ if (me.indicator) {
+ me.indicator.hide();
+ }
+ },
+
+ // The mouse is past the end of all nodes (or there are no nodes)
+ onContainerOver : function(dd, e, data) {
+ var me = this,
+ view = me.view,
+ count = view.store.getCount();
+
+ // There are records, so position after the last one
+ if (count) {
+ me.positionIndicator(view.getNode(count - 1), data, e);
+ }
+
+ // No records, position the indicator at the top
+ else {
+ delete me.overRecord;
+ delete me.currentPosition;
+ me.getIndicator().setWidth(Ext.fly(view.el).getWidth()).showAt(0, 0);
+ me.valid = true;
+ }
+ return me.dropAllowed;
+ },
+
+ onContainerDrop : function(dd, e, data) {
+ return this.onNodeDrop(dd, null, e, data);
+ },
+
+ onNodeDrop: function(node, dragZone, e, data) {
+ var me = this,
+ dropped = false,
+
+ // Create a closure to perform the operation which the event handler may use.
+ // Users may now return <code>false</code> from the beforedrop handler, and perform any kind
+ // of asynchronous processing such as an Ext.Msg.confirm, or an Ajax request,
+ // and complete the drop gesture at some point in the future by calling this function.
+ processDrop = function () {
+ me.invalidateDrop();
+ me.handleNodeDrop(data, me.overRecord, me.currentPosition);
+ dropped = true;
+ me.fireViewEvent('drop', node, data, me.overRecord, me.currentPosition);
+ },
+ performOperation = false;
+
+ if (me.valid) {
+ performOperation = me.fireViewEvent('beforedrop', node, data, me.overRecord, me.currentPosition, processDrop);
+ if (performOperation !== false) {
+ // If the processDrop function was called in the event handler, do not do it again.
+ if (!dropped) {
+ processDrop();
+ }
+ }
+ }
+ return performOperation;
+ }
+});
+</pre>
+</body>
+</html>
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