ViewDropZone2.html
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<pre class="prettyprint lang-js"><span id='Ext-tree-ViewDropZone'>/**
</span> * @private
*/
Ext.define('Ext.tree.ViewDropZone', {
extend: 'Ext.view.DropZone',
<span id='Ext-tree-ViewDropZone-cfg-allowParentInsert'> /**
</span> * @cfg {Boolean} allowParentInsert
* Allow inserting a dragged node between an expanded parent node and its first child that will become a
* sibling of the parent when dropped.
*/
allowParentInserts: false,
<span id='Ext-tree-ViewDropZone-cfg-allowContainerDrop'> /**
</span> * @cfg {String} allowContainerDrop
* True if drops on the tree container (outside of a specific tree node) are allowed.
*/
allowContainerDrops: false,
<span id='Ext-tree-ViewDropZone-cfg-appendOnly'> /**
</span> * @cfg {String} appendOnly
* True if the tree should only allow append drops (use for trees which are sorted).
*/
appendOnly: false,
<span id='Ext-tree-ViewDropZone-cfg-expandDelay'> /**
</span> * @cfg {String} expandDelay
* The delay in milliseconds to wait before expanding a target tree node while dragging a droppable node
* over the target.
*/
expandDelay : 500,
indicatorCls: Ext.baseCSSPrefix + 'tree-ddindicator',
// private
expandNode : function(node) {
var view = this.view;
if (!node.isLeaf() && !node.isExpanded()) {
view.expand(node);
this.expandProcId = false;
}
},
// private
queueExpand : function(node) {
this.expandProcId = Ext.Function.defer(this.expandNode, this.expandDelay, this, [node]);
},
// private
cancelExpand : function() {
if (this.expandProcId) {
clearTimeout(this.expandProcId);
this.expandProcId = false;
}
},
getPosition: function(e, node) {
var view = this.view,
record = view.getRecord(node),
y = e.getPageY(),
noAppend = record.isLeaf(),
noBelow = false,
region = Ext.fly(node).getRegion(),
fragment;
// If we are dragging on top of the root node of the tree, we always want to append.
if (record.isRoot()) {
return 'append';
}
// Return 'append' if the node we are dragging on top of is not a leaf else return false.
if (this.appendOnly) {
return noAppend ? false : 'append';
}
if (!this.allowParentInsert) {
noBelow = record.hasChildNodes() && record.isExpanded();
}
fragment = (region.bottom - region.top) / (noAppend ? 2 : 3);
if (y >= region.top && y < (region.top + fragment)) {
return 'before';
}
else if (!noBelow && (noAppend || (y >= (region.bottom - fragment) && y <= region.bottom))) {
return 'after';
}
else {
return 'append';
}
},
isValidDropPoint : function(node, position, dragZone, e, data) {
if (!node || !data.item) {
return false;
}
var view = this.view,
targetNode = view.getRecord(node),
draggedRecords = data.records,
dataLength = draggedRecords.length,
ln = draggedRecords.length,
i, record;
// No drop position, or dragged records: invalid drop point
if (!(targetNode && position && dataLength)) {
return false;
}
// If the targetNode is within the folder we are dragging
for (i = 0; i < ln; i++) {
record = draggedRecords[i];
if (record.isNode && record.contains(targetNode)) {
return false;
}
}
// Respect the allowDrop field on Tree nodes
if (position === 'append' && targetNode.get('allowDrop') === false) {
return false;
}
else if (position != 'append' && targetNode.parentNode.get('allowDrop') === false) {
return false;
}
// If the target record is in the dragged dataset, then invalid drop
if (Ext.Array.contains(draggedRecords, targetNode)) {
return false;
}
// @TODO: fire some event to notify that there is a valid drop possible for the node you're dragging
// Yes: this.fireViewEvent(blah....) fires an event through the owning View.
return true;
},
onNodeOver : function(node, dragZone, e, data) {
var position = this.getPosition(e, node),
returnCls = this.dropNotAllowed,
view = this.view,
targetNode = view.getRecord(node),
indicator = this.getIndicator(),
indicatorX = 0,
indicatorY = 0;
// auto node expand check
this.cancelExpand();
if (position == 'append' && !this.expandProcId && !Ext.Array.contains(data.records, targetNode) && !targetNode.isLeaf() && !targetNode.isExpanded()) {
this.queueExpand(targetNode);
}
if (this.isValidDropPoint(node, position, dragZone, e, data)) {
this.valid = true;
this.currentPosition = position;
this.overRecord = targetNode;
indicator.setWidth(Ext.fly(node).getWidth());
indicatorY = Ext.fly(node).getY() - Ext.fly(view.el).getY() - 1;
/*
* In the code below we show the proxy again. The reason for doing this is showing the indicator will
* call toFront, causing it to get a new z-index which can sometimes push the proxy behind it. We always
* want the proxy to be above, so calling show on the proxy will call toFront and bring it forward.
*/
if (position == 'before') {
returnCls = targetNode.isFirst() ? Ext.baseCSSPrefix + 'tree-drop-ok-above' : Ext.baseCSSPrefix + 'tree-drop-ok-between';
indicator.showAt(0, indicatorY);
dragZone.proxy.show();
} else if (position == 'after') {
returnCls = targetNode.isLast() ? Ext.baseCSSPrefix + 'tree-drop-ok-below' : Ext.baseCSSPrefix + 'tree-drop-ok-between';
indicatorY += Ext.fly(node).getHeight();
indicator.showAt(0, indicatorY);
dragZone.proxy.show();
} else {
returnCls = Ext.baseCSSPrefix + 'tree-drop-ok-append';
// @TODO: set a class on the parent folder node to be able to style it
indicator.hide();
}
} else {
this.valid = false;
}
this.currentCls = returnCls;
return returnCls;
},
onContainerOver : function(dd, e, data) {
return e.getTarget('.' + this.indicatorCls) ? this.currentCls : this.dropNotAllowed;
},
notifyOut: function() {
this.callParent(arguments);
this.cancelExpand();
},
handleNodeDrop : function(data, targetNode, position) {
var me = this,
view = me.view,
parentNode = targetNode.parentNode,
store = view.getStore(),
recordDomNodes = [],
records, i, len,
insertionMethod, argList,
needTargetExpand,
transferData,
processDrop;
// If the copy flag is set, create a copy of the Models with the same IDs
if (data.copy) {
records = data.records;
data.records = [];
for (i = 0, len = records.length; i < len; i++) {
data.records.push(Ext.apply({}, records[i].data));
}
}
// Cancel any pending expand operation
me.cancelExpand();
// Grab a reference to the correct node insertion method.
// Create an arg list array intended for the apply method of the
// chosen node insertion method.
// Ensure the target object for the method is referenced by 'targetNode'
if (position == 'before') {
insertionMethod = parentNode.insertBefore;
argList = [null, targetNode];
targetNode = parentNode;
}
else if (position == 'after') {
if (targetNode.nextSibling) {
insertionMethod = parentNode.insertBefore;
argList = [null, targetNode.nextSibling];
}
else {
insertionMethod = parentNode.appendChild;
argList = [null];
}
targetNode = parentNode;
}
else {
if (!targetNode.isExpanded()) {
needTargetExpand = true;
}
insertionMethod = targetNode.appendChild;
argList = [null];
}
// A function to transfer the data into the destination tree
transferData = function() {
var node,
r, rLen, color, n;
for (i = 0, len = data.records.length; i < len; i++) {
argList[0] = data.records[i];
node = insertionMethod.apply(targetNode, argList);
if (Ext.enableFx && me.dropHighlight) {
recordDomNodes.push(view.getNode(node));
}
}
// Kick off highlights after everything's been inserted, so they are
// more in sync without insertion/render overhead.
if (Ext.enableFx && me.dropHighlight) {
//FIXME: the check for n.firstChild is not a great solution here. Ideally the line should simply read
//Ext.fly(n.firstChild) but this yields errors in IE6 and 7. See ticket EXTJSIV-1705 for more details
rLen = recordDomNodes.length;
color = me.dropHighlightColor;
for (r = 0; r < rLen; r++) {
n = recordDomNodes[r];
if (n) {
Ext.fly(n.firstChild ? n.firstChild : n).highlight(color);
}
}
}
};
// If dropping right on an unexpanded node, transfer the data after it is expanded.
if (needTargetExpand) {
targetNode.expand(false, transferData);
}
// Otherwise, call the data transfer function immediately
else {
transferData();
}
}
});</pre>
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