/*
 * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.grid.GridView
 * @extends Ext.util.Observable
 *          <p>
 *          This class encapsulates the user interface of an
 *          {@link Ext.grid.GridPanel}. Methods of this class may be used to
 *          access user interface elements to enable special display effects. Do
 *          not change the DOM structure of the user interface.
 *          </p>
 *          <p>
 *          This class does not provide ways to manipulate the underlying data.
 *          The data model of a Grid is held in an {@link Ext.data.Store}.
 *          </p>
 * @constructor
 * @param {Object}
 *            config
 */
Ext.grid.GridView = function(config) {
	Ext.apply(this, config);
	// These events are only used internally by the grid components
	this.addEvents(
			/**
			 * @event beforerowremoved Internal UI Event. Fired before a row is
			 *        removed.
			 * @param {Ext.grid.GridView}
			 *            view
			 * @param {Number}
			 *            rowIndex The index of the row to be removed.
			 * @param {Ext.data.Record}
			 *            record The Record to be removed
			 */
			"beforerowremoved",
			/**
			 * @event beforerowsinserted Internal UI Event. Fired before rows
			 *        are inserted.
			 * @param {Ext.grid.GridView}
			 *            view
			 * @param {Number}
			 *            firstRow The index of the first row to be inserted.
			 * @param {Number}
			 *            lastRow The index of the last row to be inserted.
			 */
			"beforerowsinserted",
			/**
			 * @event beforerefresh Internal UI Event. Fired before the view is
			 *        refreshed.
			 * @param {Ext.grid.GridView}
			 *            view
			 */
			"beforerefresh",
			/**
			 * @event rowremoved Internal UI Event. Fired after a row is
			 *        removed.
			 * @param {Ext.grid.GridView}
			 *            view
			 * @param {Number}
			 *            rowIndex The index of the row that was removed.
			 * @param {Ext.data.Record}
			 *            record The Record that was removed
			 */
			"rowremoved",
			/**
			 * @event rowsinserted Internal UI Event. Fired after rows are
			 *        inserted.
			 * @param {Ext.grid.GridView}
			 *            view
			 * @param {Number}
			 *            firstRow The index of the first inserted.
			 * @param {Number}
			 *            lastRow The index of the last row inserted.
			 */
			"rowsinserted",
			/**
			 * @event rowupdated Internal UI Event. Fired after a row has been
			 *        updated.
			 * @param {Ext.grid.GridView}
			 *            view
			 * @param {Number}
			 *            firstRow The index of the row updated.
			 * @param {Ext.data.record}
			 *            record The Record backing the row updated.
			 */
			"rowupdated",
			/**
			 * @event refresh Internal UI Event. Fired after the GridView's body
			 *        has been refreshed.
			 * @param {Ext.grid.GridView}
			 *            view
			 */
			"refresh");
	Ext.grid.GridView.superclass.constructor.call(this);
};

Ext.extend(Ext.grid.GridView, Ext.util.Observable, {
	/**
	 * Override this function to apply custom CSS classes to rows during
	 * rendering. You can also supply custom parameters to the row template for
	 * the current row to customize how it is rendered using the <b>rowParams</b>
	 * parameter. This function should return the CSS class name (or empty
	 * string '' for none) that will be added to the row's wrapping div. To
	 * apply multiple class names, simply return them space-delimited within the
	 * string (e.g., 'my-class another-class').
	 * 
	 * @param {Record}
	 *            record The {@link Ext.data.Record} corresponding to the
	 *            current row
	 * @param {Number}
	 *            index The row index
	 * @param {Object}
	 *            rowParams A config object that is passed to the row template
	 *            during rendering that allows customization of various aspects
	 *            of a body row, if applicable. Note that this object will only
	 *            be applied if {@link #enableRowBody} = true, otherwise it will
	 *            be ignored. The object may contain any of these properties:
	 *            <ul>
	 *            <li><code>body</code> : String <div class="sub-desc">An
	 *            HTML fragment to be rendered as the cell's body content
	 *            (defaults to '').</div></li>
	 *            <li><code>bodyStyle</code> : String <div class="sub-desc">A
	 *            CSS style string that will be applied to the row's TR style
	 *            attribute (defaults to '').</div></li>
	 *            <li><code>cols</code> : Number <div class="sub-desc">The
	 *            column count to apply to the body row's TD colspan attribute
	 *            (defaults to the current column count of the grid).</div></li>
	 *            </ul>
	 * @param {Store}
	 *            store The {@link Ext.data.Store} this grid is bound to
	 * @method getRowClass
	 * @return {String} a CSS class name to add to the row.
	 */
	/**
	 * @cfg {Boolean} enableRowBody True to add a second TR element per row that
	 *      can be used to provide a row body that spans beneath the data row.
	 *      Use the {@link #getRowClass} method's rowParams config to customize
	 *      the row body.
	 */
	/**
	 * @cfg {String} emptyText Default text to display in the grid body when no
	 *      rows are available (defaults to '').
	 */
	/**
	 * The amount of space to reserve for the scrollbar (defaults to 19 pixels)
	 * 
	 * @type Number
	 */
	scrollOffset : 19,
	/**
	 * @cfg {Boolean} autoFill True to auto expand the columns to fit the grid
	 *      <b>when the grid is created</b>.
	 */
	autoFill : false,
	/**
	 * @cfg {Boolean} forceFit True to auto expand/contract the size of the
	 *      columns to fit the grid width and prevent horizontal scrolling.
	 */
	forceFit : false,
	/**
	 * The CSS classes applied to a header when it is sorted. (defaults to
	 * ["sort-asc", "sort-desc"])
	 * 
	 * @type Array
	 */
	sortClasses : ["sort-asc", "sort-desc"],
	/**
	 * The text displayed in the "Sort Ascending" menu item
	 * 
	 * @type String
	 */
	sortAscText : "Sort Ascending",
	/**
	 * The text displayed in the "Sort Descending" menu item
	 * 
	 * @type String
	 */
	sortDescText : "Sort Descending",
	/**
	 * The text displayed in the "Columns" menu item
	 * 
	 * @type String
	 */
	columnsText : "Columns",

	// private
	borderWidth : 2,

	/*
	 * -------------------------------- UI Specific
	 * -----------------------------
	 */

	// private
	initTemplates : function() {
		var ts = this.templates || {};
		if (!ts.master) {
			ts.master = new Ext.Template(
					'<div class="x-grid3" hidefocus="true">',
					'<div class="x-grid3-viewport">',
					'<div class="x-grid3-header"><div class="x-grid3-header-inner"><div class="x-grid3-header-offset">{header}</div></div><div class="x-clear"></div></div>',
					'<div class="x-grid3-scroller"><div class="x-grid3-body">{body}</div><a href="javascript:;" class="x-grid3-focus" tabIndex="-1"></a></div>',
					"</div>",
					'<div class="x-grid3-resize-marker">&#160;</div>',
					'<div class="x-grid3-resize-proxy">&#160;</div>', "</div>");
		}

		if (!ts.header) {
			ts.header = new Ext.Template(
					'<table border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
					'<thead><tr class="x-grid3-hd-row">{cells}</tr></thead>',
					"</table>");
		}

		if (!ts.hcell) {
			ts.hcell = new Ext.Template(
					'<td class="x-grid3-hd x-grid3-cell x-grid3-td-{id}" style="{style}"><div {attr} class="x-grid3-hd-inner x-grid3-hd-{id}" unselectable="on" style="{istyle}">',
					this.grid.enableHdMenu
							? '<a class="x-grid3-hd-btn" href="javascript:;"></a>'
							: '',
					'{value}<img class="x-grid3-sort-icon" src="',
					Ext.BLANK_IMAGE_URL, '" />', "</div></td>");
		}

		if (!ts.body) {
			ts.body = new Ext.Template('{rows}');
		}

		if (!ts.row) {
			ts.row = new Ext.Template(
					'<div class="x-grid3-row {alt}" style="{tstyle}"><table class="x-grid3-row-table" border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
					'<tbody><tr>{cells}</tr>',
					(this.enableRowBody
							? '<tr class="x-grid3-row-body-tr" style="{bodyStyle}"><td colspan="{cols}" class="x-grid3-body-cell" tabIndex="0" hidefocus="on"><div class="x-grid3-row-body">{body}</div></td></tr>'
							: ''), '</tbody></table></div>');
		}

		if (!ts.cell) {
			ts.cell = new Ext.Template(
					'<td class="x-grid3-col x-grid3-cell x-grid3-td-{id} {css}" style="{style}" tabIndex="0" {cellAttr}>',
					'<div class="x-grid3-cell-inner x-grid3-col-{id}" unselectable="on" {attr}>{value}</div>',
					"</td>");
		}

		for (var k in ts) {
			var t = ts[k];
			if (t && typeof t.compile == 'function' && !t.compiled) {
				t.disableFormats = true;
				t.compile();
			}
		}

		this.templates = ts;

		this.tdClass = 'x-grid3-cell';
		this.cellSelector = 'td.x-grid3-cell';
		this.hdCls = 'x-grid3-hd';
		this.rowSelector = 'div.x-grid3-row';
		this.colRe = new RegExp("x-grid3-td-([^\\s]+)", "");
	},

	// private
	fly : function(el) {
		if (!this._flyweight) {
			this._flyweight = new Ext.Element.Flyweight(document.body);
		}
		this._flyweight.dom = el;
		return this._flyweight;
	},

	// private
	getEditorParent : function(ed) {
		return this.scroller.dom;
	},

	// private
	initElements : function() {
		var E = Ext.Element;

		var el = this.grid.getGridEl().dom.firstChild;
		var cs = el.childNodes;

		this.el = new E(el);

		this.mainWrap = new E(cs[0]);
		this.mainHd = new E(this.mainWrap.dom.firstChild);
		this.innerHd = this.mainHd.dom.firstChild;
		this.scroller = new E(this.mainWrap.dom.childNodes[1]);
		if (this.forceFit) {
			this.scroller.setStyle('overflow-x', 'hidden');
		}
		this.mainBody = new E(this.scroller.dom.firstChild);

		this.focusEl = new E(this.scroller.dom.childNodes[1]);
		this.focusEl.swallowEvent("click", true);

		this.resizeMarker = new E(cs[1]);
		this.resizeProxy = new E(cs[2]);
	},

	// private
	getRows : function() {
		return this.hasRows() ? this.mainBody.dom.childNodes : [];
	},

	// finder methods, used with delegation

	// private
	findCell : function(el) {
		if (!el) {
			return false;
		}
		return this.fly(el).findParent(this.cellSelector, 3);
	},

	// private
	findCellIndex : function(el, requiredCls) {
		var cell = this.findCell(el);
		if (cell && (!requiredCls || this.fly(cell).hasClass(requiredCls))) {
			return this.getCellIndex(cell);
		}
		return false;
	},

	// private
	getCellIndex : function(el) {
		if (el) {
			var m = el.className.match(this.colRe);
			if (m && m[1]) {
				return this.cm.getIndexById(m[1]);
			}
		}
		return false;
	},

	// private
	findHeaderCell : function(el) {
		var cell = this.findCell(el);
		return cell && this.fly(cell).hasClass(this.hdCls) ? cell : null;
	},

	// private
	findHeaderIndex : function(el) {
		return this.findCellIndex(el, this.hdCls);
	},

	// private
	findRow : function(el) {
		if (!el) {
			return false;
		}
		return this.fly(el).findParent(this.rowSelector, 10);
	},

	// private
	findRowIndex : function(el) {
		var r = this.findRow(el);
		return r ? r.rowIndex : false;
	},

	// getter methods for fetching elements dynamically in the grid

	/**
	 * Return the &lt;TR> HtmlElement which represents a Grid row for the
	 * specified index.
	 * 
	 * @param {Number}
	 *            index The row index
	 * @return {HtmlElement} The &lt;TR> element.
	 */
	getRow : function(row) {
		return this.getRows()[row];
	},

	/**
	 * Returns the grid's &lt;TD> HtmlElement at the specified coordinates.
	 * 
	 * @param {Number}
	 *            row The row index in which to find the cell.
	 * @param {Number}
	 *            col The column index of the cell.
	 * @return {HtmlElement} The &lt;TD> at the specified coordinates.
	 */
	getCell : function(row, col) {
		return this.getRow(row).getElementsByTagName('td')[col];
	},

	/**
	 * Return the &lt;TD> HtmlElement which represents the Grid's header cell
	 * for the specified column index.
	 * 
	 * @param {Number}
	 *            index The column index
	 * @return {HtmlElement} The &lt;TD> element.
	 */
	getHeaderCell : function(index) {
		return this.mainHd.dom.getElementsByTagName('td')[index];
	},

	// manipulating elements

	// private - use getRowClass to apply custom row classes
	addRowClass : function(row, cls) {
		var r = this.getRow(row);
		if (r) {
			this.fly(r).addClass(cls);
		}
	},

	// private
	removeRowClass : function(row, cls) {
		var r = this.getRow(row);
		if (r) {
			this.fly(r).removeClass(cls);
		}
	},

	// private
	removeRow : function(row) {
		Ext.removeNode(this.getRow(row));
	},

	// private
	removeRows : function(firstRow, lastRow) {
		var bd = this.mainBody.dom;
		for (var rowIndex = firstRow; rowIndex <= lastRow; rowIndex++) {
			Ext.removeNode(bd.childNodes[firstRow]);
		}
	},

	// scrolling stuff

	// private
	getScrollState : function() {
		var sb = this.scroller.dom;
		return {
			left : sb.scrollLeft,
			top : sb.scrollTop
		};
	},

	// private
	restoreScroll : function(state) {
		var sb = this.scroller.dom;
		sb.scrollLeft = state.left;
		sb.scrollTop = state.top;
	},

	/**
	 * Scrolls the grid to the top
	 */
	scrollToTop : function() {
		this.scroller.dom.scrollTop = 0;
		this.scroller.dom.scrollLeft = 0;
	},

	// private
	syncScroll : function() {
		var mb = this.scroller.dom;
		this.innerHd.scrollLeft = mb.scrollLeft;
		this.innerHd.scrollLeft = mb.scrollLeft; // second time for IE (1/2
													// time first fails, other
													// browsers ignore)
		this.grid.fireEvent("bodyscroll", mb.scrollLeft, mb.scrollTop);
	},

	// private
	updateSortIcon : function(col, dir) {
		var sc = this.sortClasses;
		var hds = this.mainHd.select('td').removeClass(sc);
		hds.item(col).addClass(sc[dir == "DESC" ? 1 : 0]);
	},

	// private
	updateAllColumnWidths : function() {
		var tw = this.getTotalWidth();
		var clen = this.cm.getColumnCount();
		var ws = [];
		for (var i = 0; i < clen; i++) {
			ws[i] = this.getColumnWidth(i);
		}

		this.innerHd.firstChild.firstChild.style.width = tw;

		for (var i = 0; i < clen; i++) {
			var hd = this.getHeaderCell(i);
			hd.style.width = ws[i];
		}

		var ns = this.getRows();
		for (var i = 0, len = ns.length; i < len; i++) {
			ns[i].style.width = tw;
			ns[i].firstChild.style.width = tw;
			var row = ns[i].firstChild.rows[0];
			for (var j = 0; j < clen; j++) {
				row.childNodes[j].style.width = ws[j];
			}
		}

		this.onAllColumnWidthsUpdated(ws, tw);
	},

	// private
	updateColumnWidth : function(col, width) {
		var w = this.getColumnWidth(col);
		var tw = this.getTotalWidth();

		this.innerHd.firstChild.firstChild.style.width = tw;
		var hd = this.getHeaderCell(col);
		hd.style.width = w;

		var ns = this.getRows();
		for (var i = 0, len = ns.length; i < len; i++) {
			ns[i].style.width = tw;
			ns[i].firstChild.style.width = tw;
			ns[i].firstChild.rows[0].childNodes[col].style.width = w;
		}

		this.onColumnWidthUpdated(col, w, tw);
	},

	// private
	updateColumnHidden : function(col, hidden) {
		var tw = this.getTotalWidth();

		this.innerHd.firstChild.firstChild.style.width = tw;

		var display = hidden ? 'none' : '';

		var hd = this.getHeaderCell(col);
		hd.style.display = display;

		var ns = this.getRows();
		for (var i = 0, len = ns.length; i < len; i++) {
			ns[i].style.width = tw;
			ns[i].firstChild.style.width = tw;
			ns[i].firstChild.rows[0].childNodes[col].style.display = display;
		}

		this.onColumnHiddenUpdated(col, hidden, tw);

		delete this.lastViewWidth; // force recalc
		this.layout();
	},

	// private
	doRender : function(cs, rs, ds, startRow, colCount, stripe) {
		var ts = this.templates, ct = ts.cell, rt = ts.row, last = colCount - 1;
		var tstyle = 'width:' + this.getTotalWidth() + ';';
		// buffers
		var buf = [], cb, c, p = {}, rp = {
			tstyle : tstyle
		}, r;
		for (var j = 0, len = rs.length; j < len; j++) {
			r = rs[j];
			cb = [];
			var rowIndex = (j + startRow);
			for (var i = 0; i < colCount; i++) {
				c = cs[i];
				p.id = c.id;
				p.css = i == 0 ? 'x-grid3-cell-first ' : (i == last
						? 'x-grid3-cell-last '
						: '');
				p.attr = p.cellAttr = "";
				p.value = c.renderer(r.data[c.name], p, r, rowIndex, i, ds);
				p.style = c.style;
				if (p.value == undefined || p.value === "")
					p.value = "&#160;";
				if (r.dirty && typeof r.modified[c.name] !== 'undefined') {
					p.css += ' x-grid3-dirty-cell';
				}
				cb[cb.length] = ct.apply(p);
			}
			var alt = [];
			if (stripe && ((rowIndex + 1) % 2 == 0)) {
				alt[0] = "x-grid3-row-alt";
			}
			if (r.dirty) {
				alt[1] = " x-grid3-dirty-row";
			}
			rp.cols = colCount;
			if (this.getRowClass) {
				alt[2] = this.getRowClass(r, rowIndex, rp, ds);
			}
			rp.alt = alt.join(" ");
			rp.cells = cb.join("");
			buf[buf.length] = rt.apply(rp);
		}
		return buf.join("");
	},

	// private
	processRows : function(startRow, skipStripe) {
		if (this.ds.getCount() < 1) {
			return;
		}
		skipStripe = skipStripe || !this.grid.stripeRows;
		startRow = startRow || 0;
		var rows = this.getRows();
		var cls = ' x-grid3-row-alt ';
		for (var i = startRow, len = rows.length; i < len; i++) {
			var row = rows[i];
			row.rowIndex = i;
			if (!skipStripe) {
				var isAlt = ((i + 1) % 2 == 0);
				var hasAlt = (' ' + row.className + ' ').indexOf(cls) != -1;
				if (isAlt == hasAlt) {
					continue;
				}
				if (isAlt) {
					row.className += " x-grid3-row-alt";
				} else {
					row.className = row.className
							.replace("x-grid3-row-alt", "");
				}
			}
		}
	},

	// private
	renderUI : function() {

		var header = this.renderHeaders();
		var body = this.templates.body.apply({
					rows : ''
				});

		var html = this.templates.master.apply({
					body : body,
					header : header
				});

		var g = this.grid;

		g.getGridEl().dom.innerHTML = html;

		this.initElements();

		this.mainBody.dom.innerHTML = this.renderRows();
		this.processRows(0, true);

		// get mousedowns early
		Ext.fly(this.innerHd).on("click", this.handleHdDown, this);
		this.mainHd.on("mouseover", this.handleHdOver, this);
		this.mainHd.on("mouseout", this.handleHdOut, this);
		this.mainHd.on("mousemove", this.handleHdMove, this);

		this.scroller.on('scroll', this.syncScroll, this);
		if (g.enableColumnResize !== false) {
			this.splitone = new Ext.grid.GridView.SplitDragZone(g,
					this.mainHd.dom);
		}

		if (g.enableColumnMove) {
			this.columnDrag = new Ext.grid.GridView.ColumnDragZone(g,
					this.innerHd);
			this.columnDrop = new Ext.grid.HeaderDropZone(g, this.mainHd.dom);
		}

		if (g.enableHdMenu !== false) {
			if (g.enableColumnHide !== false) {
				this.colMenu = new Ext.menu.Menu({
							id : g.id + "-hcols-menu"
						});
				this.colMenu.on("beforeshow", this.beforeColMenuShow, this);
				this.colMenu.on("itemclick", this.handleHdMenuClick, this);
			}
			this.hmenu = new Ext.menu.Menu({
						id : g.id + "-hctx"
					});
			this.hmenu.add({
						id : "asc",
						text : this.sortAscText,
						cls : "xg-hmenu-sort-asc"
					}, {
						id : "desc",
						text : this.sortDescText,
						cls : "xg-hmenu-sort-desc"
					});
			if (g.enableColumnHide !== false) {
				this.hmenu.add('-', {
							id : "columns",
							text : this.columnsText,
							menu : this.colMenu,
							iconCls : 'x-cols-icon'
						});
			}
			this.hmenu.on("itemclick", this.handleHdMenuClick, this);

			// g.on("headercontextmenu", this.handleHdCtx, this);
		}

		if (g.enableDragDrop || g.enableDrag) {
			var dd = new Ext.grid.GridDragZone(g, {
						ddGroup : g.ddGroup || 'GridDD'
					});
		}

		this.updateHeaderSortState();

	},

	// private
	layout : function() {
		if (!this.mainBody) {
			return; // not rendered
		}
		var g = this.grid;
		var c = g.getGridEl(), cm = this.cm, expandCol = g.autoExpandColumn, gv = this;

		var csize = c.getSize(true);
		var vw = csize.width;

		if (vw < 20 || csize.height < 20) { // display: none?
			return;
		}

		if (g.autoHeight) {
			this.scroller.dom.style.overflow = 'visible';
		} else {
			this.el.setSize(csize.width, csize.height);

			var hdHeight = this.mainHd.getHeight();
			var vh = csize.height - (hdHeight);

			this.scroller.setSize(vw, vh);
			if (this.innerHd) {
				this.innerHd.style.width = (vw) + 'px';
			}
		}
		if (this.forceFit) {
			if (this.lastViewWidth != vw) {
				this.fitColumns(false, false);
				this.lastViewWidth = vw;
			}
		} else {
			this.autoExpand();
		}
		this.onLayout(vw, vh);
	},

	// template functions for subclasses and plugins
	// these functions include precalculated values
	onLayout : function(vw, vh) {
		// do nothing
	},

	onColumnWidthUpdated : function(col, w, tw) {
		// template method
	},

	onAllColumnWidthsUpdated : function(ws, tw) {
		// template method
	},

	onColumnHiddenUpdated : function(col, hidden, tw) {
		// template method
	},

	updateColumnText : function(col, text) {
		// template method
	},

	afterMove : function(colIndex) {
		// template method
	},

	/*
	 * ----------------------------------- Core Specific
	 * -------------------------------------------
	 */
	// private
	init : function(grid) {
		this.grid = grid;

		this.initTemplates();
		this.initData(grid.store, grid.colModel);
		this.initUI(grid);
	},

	// private
	getColumnId : function(index) {
		return this.cm.getColumnId(index);
	},

	// private
	renderHeaders : function() {
		var cm = this.cm, ts = this.templates;
		var ct = ts.hcell;

		var cb = [], sb = [], p = {};

		for (var i = 0, len = cm.getColumnCount(); i < len; i++) {
			p.id = cm.getColumnId(i);
			p.value = cm.getColumnHeader(i) || "";
			p.style = this.getColumnStyle(i, true);
			if (cm.config[i].align == 'right') {
				p.istyle = 'padding-right:16px';
			}
			cb[cb.length] = ct.apply(p);
		}
		return ts.header.apply({
					cells : cb.join(""),
					tstyle : 'width:' + this.getTotalWidth() + ';'
				});
	},

	// private
	beforeUpdate : function() {
		this.grid.stopEditing();
	},

	// private
	updateHeaders : function() {
		this.innerHd.firstChild.innerHTML = this.renderHeaders();
	},

	/**
	 * Focuses the specified row..
	 * 
	 * @param {Number}
	 *            row The row index
	 */
	focusRow : function(row) {
		this.focusCell(row, 0, false);
	},

	/**
	 * Focuses the specified cell.
	 * 
	 * @param {Number}
	 *            row The row index
	 * @param {Number}
	 *            col The column index
	 */
	focusCell : function(row, col, hscroll) {
		var el = this.ensureVisible(row, col, hscroll);
		if (el) {
			this.focusEl.alignTo(el, "tl-tl");
			if (Ext.isGecko) {
				this.focusEl.focus();
			} else {
				this.focusEl.focus.defer(1, this.focusEl);
			}
		}
	},

	// private
	ensureVisible : function(row, col, hscroll) {
		if (typeof row != "number") {
			row = row.rowIndex;
		}
		if (row < 0 || row >= this.ds.getCount()) {
			return;
		}
		col = (col !== undefined ? col : 0);

		var rowEl = this.getRow(row), cellEl;
		if (!(hscroll === false && col === 0)) {
			while (this.cm.isHidden(col)) {
				col++;
			}
			cellEl = this.getCell(row, col);
		}
		if (!rowEl) {
			return;
		}

		var c = this.scroller.dom;

		var ctop = 0;
		var p = rowEl, stop = this.el.dom;
		while (p && p != stop) {
			ctop += p.offsetTop;
			p = p.offsetParent;
		}
		ctop -= this.mainHd.dom.offsetHeight;

		var cbot = ctop + rowEl.offsetHeight;

		var ch = c.clientHeight;
		var stop = parseInt(c.scrollTop, 10);
		var sbot = stop + ch;

		if (ctop < stop) {
			c.scrollTop = ctop;
		} else if (cbot > sbot) {
			c.scrollTop = cbot - ch;
		}

		if (hscroll !== false) {
			var cleft = parseInt(cellEl.offsetLeft, 10);
			var cright = cleft + cellEl.offsetWidth;

			var sleft = parseInt(c.scrollLeft, 10);
			var sright = sleft + c.clientWidth;
			if (cleft < sleft) {
				c.scrollLeft = cleft;
			} else if (cright > sright) {
				c.scrollLeft = cright - c.clientWidth;
			}
		}
		return cellEl || rowEl;
	},

	// private
	insertRows : function(dm, firstRow, lastRow, isUpdate) {
		if (firstRow === 0 && lastRow == dm.getCount() - 1) {
			this.refresh();
		} else {
			if (!isUpdate) {
				this.fireEvent("beforerowsinserted", this, firstRow, lastRow);
			}
			var html = this.renderRows(firstRow, lastRow);
			var before = this.getRow(firstRow);
			if (before) {
				Ext.DomHelper.insertHtml('beforeBegin', before, html);
			} else {
				Ext.DomHelper.insertHtml('beforeEnd', this.mainBody.dom, html);
			}
			if (!isUpdate) {
				this.fireEvent("rowsinserted", this, firstRow, lastRow);
				this.processRows(firstRow);
			}
		}
	},

	// private
	deleteRows : function(dm, firstRow, lastRow) {
		if (dm.getRowCount() < 1) {
			this.refresh();
		} else {
			this.fireEvent("beforerowsdeleted", this, firstRow, lastRow);

			this.removeRows(firstRow, lastRow);

			this.processRows(firstRow);
			this.fireEvent("rowsdeleted", this, firstRow, lastRow);
		}
	},

	// private
	getColumnStyle : function(col, isHeader) {
		var style = !isHeader ? (this.cm.config[col].css || '') : '';
		style += 'width:' + this.getColumnWidth(col) + ';';
		if (this.cm.isHidden(col)) {
			style += 'display:none;';
		}
		var align = this.cm.config[col].align;
		if (align) {
			style += 'text-align:' + align + ';';
		}
		return style;
	},

	// private
	getColumnWidth : function(col) {
		var w = this.cm.getColumnWidth(col);
		if (typeof w == 'number') {
			return (Ext.isBorderBox ? w : (w - this.borderWidth > 0 ? w
					- this.borderWidth : 0))
					+ 'px';
		}
		return w;
	},

	// private
	getTotalWidth : function() {
		return this.cm.getTotalWidth() + 'px';
	},

	// private
	fitColumns : function(preventRefresh, onlyExpand, omitColumn) {
		var cm = this.cm, leftOver, dist, i;
		var tw = cm.getTotalWidth(false);
		var aw = this.grid.getGridEl().getWidth(true) - this.scrollOffset;

		if (aw < 20) { // not initialized, so don't screw up the default widths
			return;
		}
		var extra = aw - tw;

		if (extra === 0) {
			return false;
		}

		var vc = cm.getColumnCount(true);
		var ac = vc - (typeof omitColumn == 'number' ? 1 : 0);
		if (ac === 0) {
			ac = 1;
			omitColumn = undefined;
		}
		var colCount = cm.getColumnCount();
		var cols = [];
		var extraCol = 0;
		var width = 0;
		var w;
		for (i = 0; i < colCount; i++) {
			if (!cm.isHidden(i) && !cm.isFixed(i) && i !== omitColumn) {
				w = cm.getColumnWidth(i);
				cols.push(i);
				extraCol = i;
				cols.push(w);
				width += w;
			}
		}
		var frac = (aw - cm.getTotalWidth()) / width;
		while (cols.length) {
			w = cols.pop();
			i = cols.pop();
			cm.setColumnWidth(i, Math.max(this.grid.minColumnWidth, Math
									.floor(w + w * frac)), true);
		}

		if ((tw = cm.getTotalWidth(false)) > aw) {
			var adjustCol = ac != vc ? omitColumn : extraCol;
			cm.setColumnWidth(adjustCol, Math.max(1, cm
									.getColumnWidth(adjustCol)
									- (tw - aw)), true);
		}

		if (preventRefresh !== true) {
			this.updateAllColumnWidths();
		}

		return true;
	},

	// private
	autoExpand : function(preventUpdate) {
		var g = this.grid, cm = this.cm;
		if (!this.userResized && g.autoExpandColumn) {
			var tw = cm.getTotalWidth(false);
			var aw = this.grid.getGridEl().getWidth(true) - this.scrollOffset;
			if (tw != aw) {
				var ci = cm.getIndexById(g.autoExpandColumn);
				var currentWidth = cm.getColumnWidth(ci);
				var cw = Math.min(Math.max(((aw - tw) + currentWidth),
								g.autoExpandMin), g.autoExpandMax);
				if (cw != currentWidth) {
					cm.setColumnWidth(ci, cw, true);
					if (preventUpdate !== true) {
						this.updateColumnWidth(ci, cw);
					}
				}
			}

		}
	},

	// private
	getColumnData : function() {
		// build a map for all the columns
		var cs = [], cm = this.cm, colCount = cm.getColumnCount();
		for (var i = 0; i < colCount; i++) {
			var name = cm.getDataIndex(i);
			cs[i] = {
				name : (typeof name == 'undefined'
						? this.ds.fields.get(i).name
						: name),
				renderer : cm.getRenderer(i),
				id : cm.getColumnId(i),
				style : this.getColumnStyle(i)
			};
		}
		return cs;
	},

	// private
	renderRows : function(startRow, endRow) {
		// pull in all the crap needed to render rows
		var g = this.grid, cm = g.colModel, ds = g.store, stripe = g.stripeRows;
		var colCount = cm.getColumnCount();

		if (ds.getCount() < 1) {
			return "";
		}

		var cs = this.getColumnData();

		startRow = startRow || 0;
		endRow = typeof endRow == "undefined" ? ds.getCount() - 1 : endRow;

		// records to render
		var rs = ds.getRange(startRow, endRow);

		return this.doRender(cs, rs, ds, startRow, colCount, stripe);
	},

	// private
	renderBody : function() {
		var markup = this.renderRows();
		return this.templates.body.apply({
					rows : markup
				});
	},

	// private
	refreshRow : function(record) {
		var ds = this.ds, index;
		if (typeof record == 'number') {
			index = record;
			record = ds.getAt(index);
		} else {
			index = ds.indexOf(record);
		}
		var cls = [];
		this.insertRows(ds, index, index, true);
		this.getRow(index).rowIndex = index;
		this.onRemove(ds, record, index + 1, true);
		this.fireEvent("rowupdated", this, index, record);
	},

	/**
	 * Refreshs the grid UI
	 * 
	 * @param {Boolean}
	 *            headersToo (optional) True to also refresh the headers
	 */
	refresh : function(headersToo) {
		this.fireEvent("beforerefresh", this);
		this.grid.stopEditing();

		var result = this.renderBody();
		this.mainBody.update(result);

		if (headersToo === true) {
			this.updateHeaders();
			this.updateHeaderSortState();
		}
		this.processRows(0, true);
		this.layout();
		this.applyEmptyText();
		this.fireEvent("refresh", this);
	},

	// private
	applyEmptyText : function() {
		if (this.emptyText && !this.hasRows()) {
			this.mainBody.update('<div class="x-grid-empty">' + this.emptyText
					+ '</div>');
		}
	},

	// private
	updateHeaderSortState : function() {
		var state = this.ds.getSortState();
		if (!state) {
			return;
		}
		if (!this.sortState
				|| (this.sortState.field != state.field || this.sortState.direction != state.direction)) {
			this.grid.fireEvent('sortchange', this.grid, state);
		}
		this.sortState = state;
		var sortColumn = this.cm.findColumnIndex(state.field);
		if (sortColumn != -1) {
			var sortDir = state.direction;
			this.updateSortIcon(sortColumn, sortDir);
		}
	},

	// private
	destroy : function() {
		if (this.colMenu) {
			this.colMenu.removeAll();
			Ext.menu.MenuMgr.unregister(this.colMenu);
			this.colMenu.getEl().remove();
			delete this.colMenu;
		}
		if (this.hmenu) {
			this.hmenu.removeAll();
			Ext.menu.MenuMgr.unregister(this.hmenu);
			this.hmenu.getEl().remove();
			delete this.hmenu;
		}
		if (this.grid.enableColumnMove) {
			var dds = Ext.dd.DDM.ids['gridHeader' + this.grid.getGridEl().id];
			if (dds) {
				for (var dd in dds) {
					if (!dds[dd].config.isTarget && dds[dd].dragElId) {
						var elid = dds[dd].dragElId;
						dds[dd].unreg();
						Ext.get(elid).remove();
					} else if (dds[dd].config.isTarget) {
						dds[dd].proxyTop.remove();
						dds[dd].proxyBottom.remove();
						dds[dd].unreg();
					}
					if (Ext.dd.DDM.locationCache[dd]) {
						delete Ext.dd.DDM.locationCache[dd];
					}
				}
				delete Ext.dd.DDM.ids['gridHeader' + this.grid.getGridEl().id];
			}
		}

		Ext.destroy(this.resizeMarker, this.resizeProxy);

		this.initData(null, null);
		Ext.EventManager.removeResizeListener(this.onWindowResize, this);
	},

	// private
	onDenyColumnHide : function() {

	},

	// private
	render : function() {

		var cm = this.cm;
		var colCount = cm.getColumnCount();

		if (this.grid.monitorWindowResize === true) {
			Ext.EventManager.onWindowResize(this.onWindowResize, this, true);
		}

		if (this.autoFill) {
			this.fitColumns(true, true);
		} else if (this.forceFit) {
			this.fitColumns(true, false);
		} else if (this.grid.autoExpandColumn) {
			this.autoExpand(true);
		}

		this.renderUI();

		// this.refresh();
	},

	// private
	onWindowResize : function() {
		if (!this.grid.monitorWindowResize || this.grid.autoHeight) {
			return;
		}
		this.layout();
	},

	/*
	 * --------------------------------- Model Events and Handlers
	 * --------------------------------
	 */
	// private
	initData : function(ds, cm) {
		if (this.ds) {
			this.ds.un("load", this.onLoad, this);
			this.ds.un("datachanged", this.onDataChange, this);
			this.ds.un("add", this.onAdd, this);
			this.ds.un("remove", this.onRemove, this);
			this.ds.un("update", this.onUpdate, this);
			this.ds.un("clear", this.onClear, this);
		}
		if (ds) {
			ds.on("load", this.onLoad, this);
			ds.on("datachanged", this.onDataChange, this);
			ds.on("add", this.onAdd, this);
			ds.on("remove", this.onRemove, this);
			ds.on("update", this.onUpdate, this);
			ds.on("clear", this.onClear, this);
		}
		this.ds = ds;

		if (this.cm) {
			this.cm.un("configchange", this.onColConfigChange, this);
			this.cm.un("widthchange", this.onColWidthChange, this);
			this.cm.un("headerchange", this.onHeaderChange, this);
			this.cm.un("hiddenchange", this.onHiddenChange, this);
			this.cm.un("columnmoved", this.onColumnMove, this);
			this.cm.un("columnlockchange", this.onColumnLock, this);
		}
		if (cm) {
			cm.on("configchange", this.onColConfigChange, this);
			cm.on("widthchange", this.onColWidthChange, this);
			cm.on("headerchange", this.onHeaderChange, this);
			cm.on("hiddenchange", this.onHiddenChange, this);
			cm.on("columnmoved", this.onColumnMove, this);
			cm.on("columnlockchange", this.onColumnLock, this);
		}
		this.cm = cm;
	},

	// private
	onDataChange : function() {
		this.refresh();
		this.updateHeaderSortState();
	},

	// private
	onClear : function() {
		this.refresh();
	},

	// private
	onUpdate : function(ds, record) {
		this.refreshRow(record);
	},

	// private
	onAdd : function(ds, records, index) {
		this.insertRows(ds, index, index + (records.length - 1));
	},

	// private
	onRemove : function(ds, record, index, isUpdate) {
		if (isUpdate !== true) {
			this.fireEvent("beforerowremoved", this, index, record);
		}
		this.removeRow(index);
		if (isUpdate !== true) {
			this.processRows(index);
			this.applyEmptyText();
			this.fireEvent("rowremoved", this, index, record);
		}
	},

	// private
	onLoad : function() {
		this.scrollToTop();
	},

	// private
	onColWidthChange : function(cm, col, width) {
		this.updateColumnWidth(col, width);
	},

	// private
	onHeaderChange : function(cm, col, text) {
		this.updateHeaders();
	},

	// private
	onHiddenChange : function(cm, col, hidden) {
		this.updateColumnHidden(col, hidden);
	},

	// private
	onColumnMove : function(cm, oldIndex, newIndex) {
		this.indexMap = null;
		var s = this.getScrollState();
		this.refresh(true);
		this.restoreScroll(s);
		this.afterMove(newIndex);
	},

	// private
	onColConfigChange : function() {
		delete this.lastViewWidth;
		this.indexMap = null;
		this.refresh(true);
	},

	/*
	 * -------------------- UI Events and Handlers
	 * ------------------------------
	 */
	// private
	initUI : function(grid) {
		grid.on("headerclick", this.onHeaderClick, this);

		if (grid.trackMouseOver) {
			grid.on("mouseover", this.onRowOver, this);
			grid.on("mouseout", this.onRowOut, this);
		}
	},

	// private
	initEvents : function() {

	},

	// private
	onHeaderClick : function(g, index) {
		if (this.headersDisabled || !this.cm.isSortable(index)) {
			return;
		}
		g.stopEditing();
		g.store.sort(this.cm.getDataIndex(index));
	},

	// private
	onRowOver : function(e, t) {
		var row;
		if ((row = this.findRowIndex(t)) !== false) {
			this.addRowClass(row, "x-grid3-row-over");
		}
	},

	// private
	onRowOut : function(e, t) {
		var row;
		if ((row = this.findRowIndex(t)) !== false
				&& row !== this.findRowIndex(e.getRelatedTarget())) {
			this.removeRowClass(row, "x-grid3-row-over");
		}
	},

	// private
	handleWheel : function(e) {
		e.stopPropagation();
	},

	// private
	onRowSelect : function(row) {
		this.addRowClass(row, "x-grid3-row-selected");
	},

	// private
	onRowDeselect : function(row) {
		this.removeRowClass(row, "x-grid3-row-selected");
	},

	// private
	onCellSelect : function(row, col) {
		var cell = this.getCell(row, col);
		if (cell) {
			this.fly(cell).addClass("x-grid3-cell-selected");
		}
	},

	// private
	onCellDeselect : function(row, col) {
		var cell = this.getCell(row, col);
		if (cell) {
			this.fly(cell).removeClass("x-grid3-cell-selected");
		}
	},

	// private
	onColumnSplitterMoved : function(i, w) {
		this.userResized = true;
		var cm = this.grid.colModel;
		cm.setColumnWidth(i, w, true);

		if (this.forceFit) {
			this.fitColumns(true, false, i);
			this.updateAllColumnWidths();
		} else {
			this.updateColumnWidth(i, w);
		}

		this.grid.fireEvent("columnresize", i, w);
	},

	// private
	handleHdMenuClick : function(item) {
		var index = this.hdCtxIndex;
		var cm = this.cm, ds = this.ds;
		switch (item.id) {
			case "asc" :
				ds.sort(cm.getDataIndex(index), "ASC");
				break;
			case "desc" :
				ds.sort(cm.getDataIndex(index), "DESC");
				break;
			default :
				index = cm.getIndexById(item.id.substr(4));
				if (index != -1) {
					if (item.checked
							&& cm.getColumnsBy(this.isHideableColumn, this).length <= 1) {
						this.onDenyColumnHide();
						return false;
					}
					cm.setHidden(index, item.checked);
				}
		}
		return true;
	},

	// private
	isHideableColumn : function(c) {
		return !c.hidden && !c.fixed;
	},

	// private
	beforeColMenuShow : function() {
		var cm = this.cm, colCount = cm.getColumnCount();
		this.colMenu.removeAll();
		for (var i = 0; i < colCount; i++) {
			if (cm.config[i].fixed !== true && cm.config[i].hideable !== false) {
				this.colMenu.add(new Ext.menu.CheckItem({
							id : "col-" + cm.getColumnId(i),
							text : cm.getColumnHeader(i),
							checked : !cm.isHidden(i),
							hideOnClick : false,
							disabled : cm.config[i].hideable === false
						}));
			}
		}
	},

	// private
	handleHdDown : function(e, t) {
		if (Ext.fly(t).hasClass('x-grid3-hd-btn')) {
			e.stopEvent();
			var hd = this.findHeaderCell(t);
			Ext.fly(hd).addClass('x-grid3-hd-menu-open');
			var index = this.getCellIndex(hd);
			this.hdCtxIndex = index;
			var ms = this.hmenu.items, cm = this.cm;
			ms.get("asc").setDisabled(!cm.isSortable(index));
			ms.get("desc").setDisabled(!cm.isSortable(index));
			this.hmenu.on("hide", function() {
						Ext.fly(hd).removeClass('x-grid3-hd-menu-open');
					}, this, {
						single : true
					});
			this.hmenu.show(t, "tl-bl?");
		}
	},

	// private
	handleHdOver : function(e, t) {
		var hd = this.findHeaderCell(t);
		if (hd && !this.headersDisabled) {
			this.activeHd = hd;
			this.activeHdIndex = this.getCellIndex(hd);
			var fly = this.fly(hd);
			this.activeHdRegion = fly.getRegion();
			if (this.cm.isSortable(this.activeHdIndex)
					&& !this.cm.isFixed(this.activeHdIndex)) {
				fly.addClass("x-grid3-hd-over");
				this.activeHdBtn = fly.child('.x-grid3-hd-btn');
				if (this.activeHdBtn) {
					this.activeHdBtn.dom.style.height = (hd.firstChild.offsetHeight - 1)
							+ 'px';
				}
			}
		}
	},

	// private
	handleHdMove : function(e, t) {
		if (this.activeHd && !this.headersDisabled) {
			var hw = this.splitHandleWidth || 5;
			var r = this.activeHdRegion;
			var x = e.getPageX();
			var ss = this.activeHd.style;
			if (x - r.left <= hw && this.cm.isResizable(this.activeHdIndex - 1)) {
				if (Ext.isSafari) {
					ss.cursor = 'e-resize';// col-resize not always supported
				} else {
					ss.cursor = 'col-resize';
				}
			} else if (r.right - x <= (!this.activeHdBtn ? hw : 2)
					&& this.cm.isResizable(this.activeHdIndex)) {
				if (Ext.isSafari) {
					ss.cursor = 'w-resize'; // col-resize not always supported
				} else {
					ss.cursor = 'col-resize';
				}
			} else {
				ss.cursor = '';
			}
		}
	},

	// private
	handleHdOut : function(e, t) {
		var hd = this.findHeaderCell(t);
		if (hd && (!Ext.isIE || !e.within(hd, true))) {
			this.activeHd = null;
			this.fly(hd).removeClass("x-grid3-hd-over");
			hd.style.cursor = '';
		}
	},

	// private
	hasRows : function() {
		var fc = this.mainBody.dom.firstChild;
		return fc && fc.className != 'x-grid-empty';
	},

	// back compat
	bind : function(d, c) {
		this.initData(d, c);
	}
});

// private
// This is a support class used internally by the Grid components
Ext.grid.GridView.SplitDragZone = function(grid, hd) {
	this.grid = grid;
	this.view = grid.getView();
	this.marker = this.view.resizeMarker;
	this.proxy = this.view.resizeProxy;
	Ext.grid.GridView.SplitDragZone.superclass.constructor.call(this, hd,
			"gridSplitters" + this.grid.getGridEl().id, {
				dragElId : Ext.id(this.proxy.dom),
				resizeFrame : false
			});
	this.scroll = false;
	this.hw = this.view.splitHandleWidth || 5;
};
Ext.extend(Ext.grid.GridView.SplitDragZone, Ext.dd.DDProxy, {

			b4StartDrag : function(x, y) {
				this.view.headersDisabled = true;
				var h = this.view.mainWrap.getHeight();
				this.marker.setHeight(h);
				this.marker.show();
				this.marker.alignTo(this.view.getHeaderCell(this.cellIndex),
						'tl-tl', [-2, 0]);
				this.proxy.setHeight(h);
				var w = this.cm.getColumnWidth(this.cellIndex);
				var minw = Math.max(w - this.grid.minColumnWidth, 0);
				this.resetConstraints();
				this.setXConstraint(minw, 1000);
				this.setYConstraint(0, 0);
				this.minX = x - minw;
				this.maxX = x + 1000;
				this.startPos = x;
				Ext.dd.DDProxy.prototype.b4StartDrag.call(this, x, y);
			},

			handleMouseDown : function(e) {
				var t = this.view.findHeaderCell(e.getTarget());
				if (t) {
					var xy = this.view.fly(t).getXY(), x = xy[0], y = xy[1];
					var exy = e.getXY(), ex = exy[0], ey = exy[1];
					var w = t.offsetWidth, adjust = false;
					if ((ex - x) <= this.hw) {
						adjust = -1;
					} else if ((x + w) - ex <= this.hw) {
						adjust = 0;
					}
					if (adjust !== false) {
						this.cm = this.grid.colModel;
						var ci = this.view.getCellIndex(t);
						if (adjust == -1) {
							while (this.cm.isHidden(ci + adjust)) {
								--adjust;
								if (ci + adjust < 0) {
									return;
								}
							}
						}
						this.cellIndex = ci + adjust;
						this.split = t.dom;
						if (this.cm.isResizable(this.cellIndex)
								&& !this.cm.isFixed(this.cellIndex)) {
							Ext.grid.GridView.SplitDragZone.superclass.handleMouseDown
									.apply(this, arguments);
						}
					} else if (this.view.columnDrag) {
						this.view.columnDrag.callHandleMouseDown(e);
					}
				}
			},

			endDrag : function(e) {
				this.marker.hide();
				var v = this.view;
				var endX = Math.max(this.minX, e.getPageX());
				var diff = endX - this.startPos;
				v.onColumnSplitterMoved(this.cellIndex, this.cm
								.getColumnWidth(this.cellIndex)
								+ diff);
				setTimeout(function() {
							v.headersDisabled = false;
						}, 50);
			},

			autoOffset : function() {
				this.setDelta(0, 0);
			}
		});