研究了一整天终于搞定了 我没有使用网上的那些div之类的 我的思想很简单就是在gridpanel所在的容器显示之前获得容器内部的高度 通过这个高度来做一个参考设定其气元素gridpanel的高度,部分代码如下

 Crim.monitorwarnning.enterpriseUniteView.QiYeFenHongDetailsWindow.superclass.constructor.call(this, Ext.applyIf(config, {
        title: '企业分红信息',
        iconCls: 'icon-moreinfo',
        resizable: false,
        width: 650,
        height: 420,
  autoScroll: true,
    ///    plain: true,
      layout: "border",
        closeAction: 'close',
        modal: true,
        defaults: {
            baseCls: 'x-plain'
        },
  items: [{
               region:"north",
     //layout: "form",
     margins: "5 5 5 5",
     border: true,
     iconCls: 'panel-search-icon',
                items: [new Crim.monitorwarnning.enterpriseUniteView.QiYeFenHongFormPanel({
     id:"中国软件分红"
    })]
        },{
     region:'center',
     layout: "border",
     border: true,
     iconCls: 'panel-search-icon',
                 items: [{
      region:"west",
      border:true,
      layout:"border",
      margins: "0 5 5 5",
      width:"50%",
      //autoHeight:true,
      iconCls: 'panel-search-icon',
      id:"westPanel",
                  items: [{
       region:"center",
       border:true,
 //      layout:"fit",
 //      margins: "0 5 5 5",
 //      width:"50%",
       autoHeight:true,
       iconCls: 'panel-search-icon',
//       id:"westPanel",

//这个是gridpanel 我自己封装的ext类
       items:new Crim.monitorwarnning.enterpriseUniteView.FenHongGridPanel({
        id:"1212"
       })
      }]
     },{
      region:"center",
      margins: "0 5 5 0",
      border: true,
      layout:"fit",
      iconCls: 'panel-search-icon',
                  items: pieCharPanel
      }]
  }]
    }));
    this.on('close', function(win){
  win.hide();
  return false;
    }, this);

//这是实现的核心
 this.on("beforeshow",function(){
  alert(Ext.getCmp("westPanel").getSize().height);
  Ext.getCmp("1212").setHeight(Ext.getCmp("westPanel").getSize().height-100);
 });
}

不明白的可以留言