Ext GridPanel单元格选中复制和浮动提示

/**
 * @class Ext.grid.GridView
 * @override Ext.grid.GridView GridView单元格不能选中复制问题,增加title浮动提示信息
 */
Ext.override(Ext.grid.GridView, {
       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" style="{ostyle}">{header}</div></div><div class="x-clear"></div></div>',
                    '<div class="x-grid3-scroller"><div class="x-grid3-body" style="{bstyle}">{body}</div><a href="#" 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} {css}" style="{style}"><div {tooltip} {attr} class="x-grid3-hd-inner x-grid3-hd-{id}" unselectable="on" style="{istyle}">',
                   this.grid.enableHdMenu
                              ? : '<a class="x-grid3-hd-btn" href="#"></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} x-selectable {css}" style="{style}" tabIndex="0" {cellAttr}>',
                  '<div class="x-grid3-cell-inner x-grid3-col-{id}" title="{tip}" {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.colRe = new RegExp("x-grid3-td-([^\\s]+)", "");
       },
       //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;";
                           }else{
                              p.tip = new String(p.value).replace(/<\/?.+?>/g, "");
                           }
                           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("");
       }
});