EXT多选框选择按住ctrl键，点击多选框无反应问题方法重写

1.EXT多选框多选时需要按住ctrl键，方法CheckboxSelectionModel，重写后选择是不需要按住ctrl键

Ext.override(Ext.grid.CheckboxSelectionModel, {   
	handleMouseDown : function(g, rowIndex, e){     
		if(e.button !== 0 || this.isLocked()){     
		  return;     
		}     
		var view = this.grid.getView();     
		if(e.shiftKey && !this.singleSelect && this.last !== false){     
		  var last = this.last;     
		  this.selectRange(last, rowIndex, e.ctrlKey);     
		  this.last = last; // reset the last     
		  view.focusRow(rowIndex);     
		}else{     
		  var isSelected = this.isSelected(rowIndex);     
		  if(isSelected){     
		    this.deselectRow(rowIndex);     
		  }else if(!isSelected || this.getCount() > 1){     
		    this.selectRow(rowIndex, true);    
		    view.focusRow(rowIndex);     
		  }     
		}     
	}   
}); 

2.EXT多选框选择是需要点击数据行才可选中改行，修改后则点击多选框即可选中

修改前：点击位置

修改后：点击位置

修改代码：红色为添加代码

HostInterIOList = Ext.extend(Ext.app.GridSelect,{
	showSaveButton : false,
	initComponent : function(){
		var csm = new Ext.grid.CheckboxSelectionModel({singleSelect:false});
		Ext.apply(this,{ 
			cm:new Ext.grid.ColumnModel([		   
				csm,
				{header: '序号',dataIndex:'sort'},
				{header: '参数名称',dataIndex:'text',width: 150},
				{header: '参数代码',dataIndex:'code'}				
			]),	
			 title : '参数映射',
			 sm:csm,
			storeMapping:[
				'sort','text', 'code','checked'
			],
		
			url:ctx+'/tabChannelInter/getHostInterIOs'
		});
		HostInterIOList.superclass.initComponent.call(this);
		
	}
});