var createGridRowContextMenu = function(e, rowIndex, rowData) {

e.preventDefault();

var grid = $(this);/* grid本身 */

var rowContextMenu = this.rowContextMenu;/* grid上的列头菜单对象 */

grid.datagrid('unselectAll').datagrid('selectRow', rowIndex);

if (!rowContextMenu) {

var tmenu = $('').appendTo('body');

var toolbar = grid.datagrid('getToolbar');

var filedHTML = $('');

var span = $('翻页控制');

var spdiv = $('');

for ( var i = 0; i < toolbar.length; i++) {

var btn = $(toolbar[i]).linkbutton('options');

var btnElement = $(toolbar[i]).linkbutton();

var c = $(btnElement).attr("onclick");

$("").html(btn.text).appendTo(tmenu);

//$('').html(btn.text).appendTo(tmenu);

}

spdiv.append('首页');

spdiv.append('上一页');

spdiv.append('下一页');

spdiv.append('末页');

span.appendTo(filedHTML);

spdiv.appendTo(filedHTML);

filedHTML.appendTo(tmenu);

rowContextMenu = this.rowContextMenu = tmenu.menu({

onClick : function(item) {

var fire = $(item.target).attr('fire');

if(fire){

new Function(fire)(); //eval(fire); eval 也是可行的;

}

var pager = grid.datagrid('getPager').pagination('options'); //拿到pager

var pagination = $(item.target).attr('iconCls');

var pageNum = 0

var page = pager.total / pager.pageSize; //总行书 / 每页显示行数 = 总页数

page = Math.ceil(page)

if(pagination == 'pagination-first'){

pageNum = 1;

}

if(pagination == 'pagination-prev'){

pageNum = pager.pageNumber - 1;

}

if(pagination == 'pagination-next'){

pageNum = pager.pageNumber + 1;

}

if(pagination == 'pagination-last'){

pageNum = page;

}

grid.datagrid('getPager').pagination('select',pageNum);

}

});

}else{

}

rowContextMenu.menu('show', {

left : e.pageX,

top : e.pageY

});

var pager = grid.datagrid('getPager').pagination('options'); //拿到pager

var itemFirst = rowContextMenu.menu('findItem','首页');

var itemPrev = rowContextMenu.menu('findItem','上一页');

var itemNext = rowContextMenu.menu('findItem','下一页');

var itemLast = rowContextMenu.menu('findItem','末页');

rowContextMenu.menu('disableItem',itemFirst.target);

rowContextMenu.menu('disableItem',itemPrev.target);

rowContextMenu.menu('disableItem',itemNext.target);

rowContextMenu.menu('disableItem',itemLast.target);

var page = pager.total / pager.pageSize; //总行书 / 每页显示行数 = 总页数

//if(page < 1){ //如果页数小于0

//那么页数 = 1 page = 1;

//}

page = Math.ceil(page)

if(page < 1)

page=page+1;

if(1 < pager.pageNumber && pager.pageNumber < page){

rowContextMenu.menu('enableItem',itemFirst.target);

rowContextMenu.menu('enableItem',itemPrev.target);

rowContextMenu.menu('enableItem',itemNext.target);

rowContextMenu.menu('enableItem',itemLast.target);

}

if(page == pager.pageNumber && pager.pageNumber != 1){

rowContextMenu.menu('enableItem',itemFirst.target);

rowContextMenu.menu('enableItem',itemPrev.target);

}

if(pager.pageNumber == 1 && page != 1){

rowContextMenu.menu('enableItem',itemNext.target);

rowContextMenu.menu('enableItem',itemLast.target);

}

};

$.fn.datagrid.defaults.onRowContextMenu = createGridRowContextMenu;

$.fn.treegrid.defaults.onRowContextMenu = createGridRowContextMenu;