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+ <pre class="prettyprint lang-js"><span id='Ext-grid-header-DropZone'>/**
+</span> * @class Ext.grid.header.DropZone
+ * @extends Ext.dd.DropZone
+ * @private
+ */
+Ext.define('Ext.grid.header.DropZone', {
+ extend: 'Ext.dd.DropZone',
+ colHeaderCls: Ext.baseCSSPrefix + 'column-header',
+ proxyOffsets: [-4, -9],
+
+ constructor: function(headerCt){
+ this.headerCt = headerCt;
+ this.ddGroup = this.getDDGroup();
+ this.callParent([headerCt.el]);
+ },
+
+ getDDGroup: function() {
+ return 'header-dd-zone-' + this.headerCt.up('[scrollerOwner]').id;
+ },
+
+ getTargetFromEvent : function(e){
+ return e.getTarget('.' + this.colHeaderCls);
+ },
+
+ getTopIndicator: function() {
+ if (!this.topIndicator) {
+ this.topIndicator = Ext.core.DomHelper.append(Ext.getBody(), {
+ cls: "col-move-top",
+ html: "&#160;"
+ }, true);
+ }
+ return this.topIndicator;
+ },
+
+ getBottomIndicator: function() {
+ if (!this.bottomIndicator) {
+ this.bottomIndicator = Ext.core.DomHelper.append(Ext.getBody(), {
+ cls: "col-move-bottom",
+ html: "&#160;"
+ }, true);
+ }
+ return this.bottomIndicator;
+ },
+
+ getLocation: function(e, t) {
+ var x = e.getXY()[0],
+ region = Ext.fly(t).getRegion(),
+ pos, header;
+
+ if ((region.right - x) <= (region.right - region.left) / 2) {
+ pos = "after";
+ } else {
+ pos = "before";
+ }
+ return {
+ pos: pos,
+ header: Ext.getCmp(t.id),
+ node: t
+ };
+ },
+
+ positionIndicator: function(draggedHeader, node, e){
+ var location = this.getLocation(e, node),
+ header = location.header,
+ pos = location.pos,
+ nextHd = draggedHeader.nextSibling('gridcolumn:not([hidden])'),
+ prevHd = draggedHeader.previousSibling('gridcolumn:not([hidden])'),
+ region, topIndicator, bottomIndicator, topAnchor, bottomAnchor,
+ topXY, bottomXY, headerCtEl, minX, maxX;
+
+ // Cannot drag beyond non-draggable start column
+ if (!header.draggable && header.getIndex() == 0) {
+ return false;
+ }
+
+ this.lastLocation = location;
+
+ if ((draggedHeader !== header) &&
+ ((pos === "before" && nextHd !== header) ||
+ (pos === "after" && prevHd !== header)) &&
+ !header.isDescendantOf(draggedHeader)) {
+
+ // As we move in between different DropZones that are in the same
+ // group (such as the case when in a locked grid), invalidateDrop
+ // on the other dropZones.
+ var allDropZones = Ext.dd.DragDropManager.getRelated(this),
+ ln = allDropZones.length,
+ i = 0,
+ dropZone;
+
+ for (; i < ln; i++) {
+ dropZone = allDropZones[i];
+ if (dropZone !== this && dropZone.invalidateDrop) {
+ dropZone.invalidateDrop();
+ }
+ }
+
+
+ this.valid = true;
+ topIndicator = this.getTopIndicator();
+ bottomIndicator = this.getBottomIndicator();
+ if (pos === 'before') {
+ topAnchor = 'tl';
+ bottomAnchor = 'bl';
+ } else {
+ topAnchor = 'tr';
+ bottomAnchor = 'br';
+ }
+ topXY = header.el.getAnchorXY(topAnchor);
+ bottomXY = header.el.getAnchorXY(bottomAnchor);
+
+ // constrain the indicators to the viewable section
+ headerCtEl = this.headerCt.el;
+ minX = headerCtEl.getLeft();
+ maxX = headerCtEl.getRight();
+
+ topXY[0] = Ext.Number.constrain(topXY[0], minX, maxX);
+ bottomXY[0] = Ext.Number.constrain(bottomXY[0], minX, maxX);
+
+ // adjust by offsets, this is to center the arrows so that they point
+ // at the split point
+ topXY[0] -= 4;
+ topXY[1] -= 9;
+ bottomXY[0] -= 4;
+
+ // position and show indicators
+ topIndicator.setXY(topXY);
+ bottomIndicator.setXY(bottomXY);
+ topIndicator.show();
+ bottomIndicator.show();
+ // invalidate drop operation and hide indicators
+ } else {
+ this.invalidateDrop();
+ }
+ },
+
+ invalidateDrop: function() {
+ this.valid = false;
+ this.hideIndicators();
+ },
+
+ onNodeOver: function(node, dragZone, e, data) {
+ if (data.header.el.dom !== node) {
+ this.positionIndicator(data.header, node, e);
+ }
+ return this.valid ? this.dropAllowed : this.dropNotAllowed;
+ },
+
+ hideIndicators: function() {
+ this.getTopIndicator().hide();
+ this.getBottomIndicator().hide();
+ },
+
+ onNodeOut: function() {
+ this.hideIndicators();
+ },
+
+ onNodeDrop: function(node, dragZone, e, data) {
+ if (this.valid) {
+ this.invalidateDrop();
+ var hd = data.header,
+ lastLocation = this.lastLocation,
+ fromCt = hd.ownerCt,
+ fromIdx = fromCt.items.indexOf(hd), // Container.items is a MixedCollection
+ toCt = lastLocation.header.ownerCt,
+ toIdx = toCt.items.indexOf(lastLocation.header),
+ headerCt = this.headerCt,
+ groupCt,
+ scrollerOwner;
+
+ if (lastLocation.pos === 'after') {
+ toIdx++;
+ }
+
+ // If we are dragging in between two HeaderContainers that have had the lockable
+ // mixin injected we will lock/unlock headers in between sections. Note that lockable
+ // does NOT currently support grouped headers.
+ if (fromCt !== toCt && fromCt.lockableInjected && toCt.lockableInjected && toCt.lockedCt) {
+ scrollerOwner = fromCt.up('[scrollerOwner]');
+ scrollerOwner.lock(hd, toIdx);
+ } else if (fromCt !== toCt && fromCt.lockableInjected && toCt.lockableInjected && fromCt.lockedCt) {
+ scrollerOwner = fromCt.up('[scrollerOwner]');
+ scrollerOwner.unlock(hd, toIdx);
+ } else {
+ // If dragging rightwards, then after removal, the insertion index will be one less when moving
+ // in between the same container.
+ if ((fromCt === toCt) && (toIdx > fromCt.items.indexOf(hd))) {
+ toIdx--;
+ }
+
+ // Remove dragged header from where it was without destroying it or relaying its Container
+ if (fromCt !== toCt) {
+ fromCt.suspendLayout = true;
+ fromCt.remove(hd, false);
+ fromCt.suspendLayout = false;
+ }
+
+ // Dragged the last header out of the fromCt group... The fromCt group must die
+ if (fromCt.isGroupHeader) {
+ if (!fromCt.items.getCount()) {
+ groupCt = fromCt.ownerCt;
+ groupCt.suspendLayout = true;
+ groupCt.remove(fromCt, false);
+ fromCt.el.dom.parentNode.removeChild(fromCt.el.dom);
+ groupCt.suspendLayout = false;
+ } else {
+ fromCt.minWidth = fromCt.getWidth() - hd.getWidth();
+ fromCt.setWidth(fromCt.minWidth);
+ }
+ }
+
+ // Move dragged header into its drop position
+ toCt.suspendLayout = true;
+ if (fromCt === toCt) {
+ toCt.move(fromIdx, toIdx);
+ } else {
+ toCt.insert(toIdx, hd);
+ }
+ toCt.suspendLayout = false;
+
+ // Group headers acquire the aggregate width of their child headers
+ // Therefore a child header may not flex; it must contribute a fixed width.
+ // But we restore the flex value when moving back into the main header container
+ if (toCt.isGroupHeader) {
+ hd.savedFlex = hd.flex;
+ delete hd.flex;
+ hd.width = hd.getWidth();
+ // When there was previously a flex, we need to ensure we don't count for the
+ // border twice.
+ toCt.minWidth = toCt.getWidth() + hd.getWidth() - (hd.savedFlex ? 1 : 0);
+ toCt.setWidth(toCt.minWidth);
+ } else {
+ if (hd.savedFlex) {
+ hd.flex = hd.savedFlex;
+ delete hd.width;
+ }
+ }
+
+
+ // Refresh columns cache in case we remove an emptied group column
+ headerCt.purgeCache();
+ headerCt.doLayout();
+ headerCt.onHeaderMoved(hd, fromIdx, toIdx);
+ // Emptied group header can only be destroyed after the header and grid have been refreshed
+ if (!fromCt.items.getCount()) {
+ fromCt.destroy();
+ }
+ }
+ }
+ }
+});
+</pre>
+</body>
+</html>
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