/*
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This file is part of Ext JS 4.2
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Copyright (c) 2011-2013 Sencha Inc
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Contact: http://www.sencha.com/contact
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GNU General Public License Usage
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This file may be used under the terms of the GNU General Public License version 3.0 as
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published by the Free Software Foundation and appearing in the file LICENSE included in the
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packaging of this file.
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Please review the following information to ensure the GNU General Public License version 3.0
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requirements will be met: http://www.gnu.org/copyleft/gpl.html.
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If you are unsure which license is appropriate for your use, please contact the sales department
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at http://www.sencha.com/contact.
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Build date: 2013-05-16 14:36:50 (f9be68accb407158ba2b1be2c226a6ce1f649314)
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*/
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/**
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* @private
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*/
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Ext.define('Ext.grid.header.DropZone', {
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extend: 'Ext.dd.DropZone',
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colHeaderCls: Ext.baseCSSPrefix + 'column-header',
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proxyOffsets: [-4, -9],
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constructor: function(headerCt){
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this.headerCt = headerCt;
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this.ddGroup = this.getDDGroup();
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this.callParent([headerCt.el]);
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},
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getDDGroup: function() {
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return 'header-dd-zone-' + this.headerCt.up('[scrollerOwner]').id;
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},
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getTargetFromEvent : function(e){
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return e.getTarget('.' + this.colHeaderCls);
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},
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getTopIndicator: function() {
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if (!this.topIndicator) {
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this.self.prototype.topIndicator = Ext.DomHelper.append(Ext.getBody(), {
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cls: "col-move-top",
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html: " "
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}, true);
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this.self.prototype.indicatorXOffset = Math.floor((this.topIndicator.dom.offsetWidth + 1) / 2);
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}
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return this.topIndicator;
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},
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getBottomIndicator: function() {
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if (!this.bottomIndicator) {
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this.self.prototype.bottomIndicator = Ext.DomHelper.append(Ext.getBody(), {
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cls: "col-move-bottom",
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html: " "
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}, true);
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}
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return this.bottomIndicator;
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},
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getLocation: function(e, t) {
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var x = e.getXY()[0],
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region = Ext.fly(t).getRegion(),
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pos;
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if ((region.right - x) <= (region.right - region.left) / 2) {
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pos = "after";
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} else {
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pos = "before";
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}
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return {
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pos: pos,
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header: Ext.getCmp(t.id),
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node: t
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};
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},
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positionIndicator: function(data, node, e){
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var me = this,
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dragHeader = data.header,
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dropLocation = me.getLocation(e, node),
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targetHeader = dropLocation.header,
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pos = dropLocation.pos,
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nextHd,
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prevHd,
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topIndicator, bottomIndicator, topAnchor, bottomAnchor,
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topXY, bottomXY, headerCtEl, minX, maxX,
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allDropZones, ln, i, dropZone;
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// Avoid expensive CQ lookups and DOM calculations if dropPosition has not changed
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if (targetHeader === me.lastTargetHeader && pos === me.lastDropPos) {
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return;
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}
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nextHd = dragHeader.nextSibling('gridcolumn:not([hidden])');
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prevHd = dragHeader.previousSibling('gridcolumn:not([hidden])');
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me.lastTargetHeader = targetHeader;
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me.lastDropPos = pos;
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// Cannot drag to before non-draggable start column
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if (!targetHeader.draggable && pos === 'before' && targetHeader.getIndex() === 0) {
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return false;
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}
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data.dropLocation = dropLocation;
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if ((dragHeader !== targetHeader) &&
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((pos === "before" && nextHd !== targetHeader) ||
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(pos === "after" && prevHd !== targetHeader)) &&
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!targetHeader.isDescendantOf(dragHeader)) {
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// As we move in between different DropZones that are in the same
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// group (such as the case when in a locked grid), invalidateDrop
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// on the other dropZones.
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allDropZones = Ext.dd.DragDropManager.getRelated(me);
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ln = allDropZones.length;
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i = 0;
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for (; i < ln; i++) {
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dropZone = allDropZones[i];
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if (dropZone !== me && dropZone.invalidateDrop) {
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dropZone.invalidateDrop();
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}
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}
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me.valid = true;
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topIndicator = me.getTopIndicator();
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bottomIndicator = me.getBottomIndicator();
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if (pos === 'before') {
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topAnchor = 'bc-tl';
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bottomAnchor = 'tc-bl';
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} else {
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topAnchor = 'bc-tr';
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bottomAnchor = 'tc-br';
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}
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// Calculate arrow positions. Offset them to align exactly with column border line
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topXY = topIndicator.getAlignToXY(targetHeader.el, topAnchor);
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bottomXY = bottomIndicator.getAlignToXY(targetHeader.el, bottomAnchor);
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// constrain the indicators to the viewable section
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headerCtEl = me.headerCt.el;
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minX = headerCtEl.getX() - me.indicatorXOffset;
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maxX = headerCtEl.getX() + headerCtEl.getWidth();
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topXY[0] = Ext.Number.constrain(topXY[0], minX, maxX);
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bottomXY[0] = Ext.Number.constrain(bottomXY[0], minX, maxX);
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// position and show indicators
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topIndicator.setXY(topXY);
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bottomIndicator.setXY(bottomXY);
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topIndicator.show();
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bottomIndicator.show();
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// invalidate drop operation and hide indicators
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} else {
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me.invalidateDrop();
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}
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},
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invalidateDrop: function() {
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this.valid = false;
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this.hideIndicators();
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},
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onNodeOver: function(node, dragZone, e, data) {
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var me = this,
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from = data.header,
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doPosition,
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to,
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fromPanel,
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toPanel;
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if (data.header.el.dom === node) {
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doPosition = false;
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} else {
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data.isLock = data.isUnlock = false;
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to = me.getLocation(e, node).header;
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// Dragging within the same container - always valid
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doPosition = (from.ownerCt === to.ownerCt);
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// If from different containers, and they are not sealed, then continue checking
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if (!doPosition && (!from.ownerCt.sealed && !to.ownerCt.sealed)) {
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doPosition = true;
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fromPanel = from.up('tablepanel');
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toPanel = to.up('tablepanel');
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// If it's a lock operation, check that it's allowable.
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data.isLock = toPanel.isLocked && !fromPanel.isLocked;
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data.isUnlock = !toPanel.isLocked && fromPanel.isLocked;
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if ((data.isUnlock && from.lockable === false) || (data.isLock && !from.isLockable())) {
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doPosition = false;
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}
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}
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}
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if (doPosition) {
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me.positionIndicator(data, node, e);
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} else {
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me.valid = false;
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}
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return me.valid ? me.dropAllowed : me.dropNotAllowed;
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},
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hideIndicators: function() {
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var me = this;
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me.getTopIndicator().hide();
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me.getBottomIndicator().hide();
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me.lastTargetHeader = me.lastDropPos = null;
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},
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onNodeOut: function() {
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this.hideIndicators();
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},
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onNodeDrop: function(node, dragZone, e, data) {
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if (this.valid) {
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var dragHeader = data.header,
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dropLocation = data.dropLocation,
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targetHeader = dropLocation.header,
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fromCt = dragHeader.ownerCt,
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localFromIdx = fromCt.items.indexOf(dragHeader), // Container.items is a MixedCollection
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toCt = targetHeader.ownerCt,
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localToIdx = toCt.items.indexOf(targetHeader),
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headerCt = this.headerCt,
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columnManager= headerCt.columnManager,
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fromIdx = columnManager.getHeaderIndex(dragHeader),
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toIdx = columnManager.getHeaderIndex(targetHeader),
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colsToMove = dragHeader.isGroupHeader ? dragHeader.query(':not([isGroupHeader])').length : 1,
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sameCt = fromCt === toCt,
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scrollerOwner, savedWidth;
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// Drop position is to the right of the targetHeader, increment the toIdx correctly
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if (dropLocation.pos === 'after') {
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localToIdx++;
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toIdx += targetHeader.isGroupHeader ? targetHeader.query(':not([isGroupHeader])').length : 1;
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}
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// If we are dragging in between two HeaderContainers that have had the lockable
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// mixin injected we will lock/unlock headers in between sections, and then continue
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// with another execution of onNodeDrop to ensure the header is dropped into the correct group
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if (data.isLock) {
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scrollerOwner = fromCt.up('[scrollerOwner]');
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scrollerOwner.lock(dragHeader, localToIdx);
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data.isLock = false;
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// Now that the header has been transferred into the correct HeaderContainer, recurse, and continue the drop operation with the same dragData
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this.onNodeDrop(node, dragZone, e, data);
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} else if (data.isUnlock) {
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scrollerOwner = fromCt.up('[scrollerOwner]');
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scrollerOwner.unlock(dragHeader, localToIdx);
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data.isUnlock = false;
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// Now that the header has been transferred into the correct HeaderContainer, recurse, and continue the drop operation with the same dragData
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this.onNodeDrop(node, dragZone, e, data);
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}
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// This is a drop within the same HeaderContainer.
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else {
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this.invalidateDrop();
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// Cache the width here, we need to get it before we removed it from the DOM
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savedWidth = dragHeader.getWidth();
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// Dragging within the same container.
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if (sameCt) {
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// A no-op. This can happen when cross lockable drag operations recurse (see above).
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// If a drop was a lock/unlock, and the lock/unlock call placed the column in the
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// desired position (lock places at end, unlock places at beginning) then we're done.
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if (localToIdx === localFromIdx) {
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// We still need to inform the rest of the components so that events can be fired.
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headerCt.onHeaderMoved(dragHeader, colsToMove, fromIdx, toIdx);
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return;
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}
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// If dragging rightwards, then after removal, the insertion index will be less.
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if (localToIdx > localFromIdx) {
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localToIdx -= 1;
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}
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}
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// Suspend layouts while we sort all this out.
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Ext.suspendLayouts();
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if (sameCt) {
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toCt.move(localFromIdx, localToIdx);
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} else {
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fromCt.remove(dragHeader, false);
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toCt.insert(localToIdx, dragHeader);
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}
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// Group headers acquire the aggregate width of their child headers
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// Therefore a child header may not flex; it must contribute a fixed width.
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// But we restore the flex value when moving back into the main header container
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if (toCt.isGroupHeader) {
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// Adjust the width of the "to" group header only if we dragged in from somewhere else.
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if (!sameCt) {
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dragHeader.savedFlex = dragHeader.flex;
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delete dragHeader.flex;
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dragHeader.width = savedWidth;
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}
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} else {
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if (dragHeader.savedFlex) {
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dragHeader.flex = dragHeader.savedFlex;
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delete dragHeader.width;
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}
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}
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// Refresh columns cache in case we remove an emptied group column
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headerCt.purgeCache();
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Ext.resumeLayouts(true);
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headerCt.onHeaderMoved(dragHeader, colsToMove, fromIdx, toIdx);
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// Ext.grid.header.Container will handle the removal of empty groups, don't handle it here
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}
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}
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}
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});
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