jQuery实现冻结表格行和列

/*
* 锁定表头和列
*
* 参数定义
* table - 要锁定的表格元素或者表格ID
* freezeRowNum - 要锁定的前几行行数，如果行不锁定，则设置为0
* freezeColumnNum - 要锁定的前几列列数，如果列不锁定，则设置为0
* width - 表格的滚动区域宽度
* height - 表格的滚动区域高度
*/
function freezeTable(table, freezeRowNum, freezeColumnNum, width, height) {
if (typeof(freezeRowNum) == 'string')
freezeRowNum = parseInt(freezeRowNum)
 
if (typeof(freezeColumnNum) == 'string')
freezeColumnNum = parseInt(freezeColumnNum)
 
var tableId;
if (typeof(table) == 'string') {
tableId = table;
table = $('#' + tableId);
} else
tableId = table.attr('id');
 
var divTableLayout = $("#" + tableId + "_tableLayout");
 
if (divTableLayout.length != 0) {
divTableLayout.before(table);
divTableLayout.empty();
} else {
table.after("<div id='" + tableId + "_tableLayout' style='overflow:hidden;height:" + height + "px; width:" + width + "px;'></div>");
 
divTableLayout = $("#" + tableId + "_tableLayout");
}
 
var html = '';
if (freezeRowNum > 0 && freezeColumnNum > 0)
html += '<div id="' + tableId + '_tableFix" style="padding: 0px;"></div>';
 
if (freezeRowNum > 0)
html += '<div id="' + tableId + '_tableHead" style="padding: 0px;"></div>';
 
if (freezeColumnNum > 0)
html += '<div id="' + tableId + '_tableColumn" style="padding: 0px;"></div>';
 
html += '<div id="' + tableId + '_tableData" style="padding: 0px;"></div>';
 
 
$(html).appendTo("#" + tableId + "_tableLayout");
 
var divTableFix = freezeRowNum > 0 && freezeColumnNum > 0 ? $("#" + tableId + "_tableFix") : null;
var divTableHead = freezeRowNum > 0 ? $("#" + tableId + "_tableHead") : null;
var divTableColumn = freezeColumnNum > 0 ? $("#" + tableId + "_tableColumn") : null;
var divTableData = $("#" + tableId + "_tableData");
 
divTableData.append(table);
 
if (divTableFix != null) {
var tableFixClone = table.clone(true);
tableFixClone.attr("id", tableId + "_tableFixClone");
divTableFix.append(tableFixClone);
}
 
if (divTableHead != null) {
var tableHeadClone = table.clone(true);
tableHeadClone.attr("id", tableId + "_tableHeadClone");
divTableHead.append(tableHeadClone);
}
 
if (divTableColumn != null) {
var tableColumnClone = table.clone(true);
tableColumnClone.attr("id", tableId + "_tableColumnClone");
divTableColumn.append(tableColumnClone);
}
 
$("#" + tableId + "_tableLayout table").css("margin", "0");
 
if (freezeRowNum > 0) {
var HeadHeight = 0;
var ignoreRowNum = 0;
$("#" + tableId + "_tableHead tr:lt(" + freezeRowNum + ")").each(function () {
if (ignoreRowNum > 0)
ignoreRowNum--;
else {
var td = $(this).find('td:first, th:first');
HeadHeight += td.outerHeight(true);
 
ignoreRowNum = td.attr('rowSpan');
if (typeof(ignoreRowNum) == 'undefined')
ignoreRowNum = 0;
else
ignoreRowNum = parseInt(ignoreRowNum) - 1;
}
});
HeadHeight += 2;
 
divTableHead.css("height", HeadHeight);
divTableFix != null && divTableFix.css("height", HeadHeight);
}
 
if (freezeColumnNum > 0) {
var ColumnsWidth = 0;
var ColumnsNumber = 0;
$("#" + tableId + "_tableColumn tr:eq(" + freezeRowNum + ")").find("td:lt(" + freezeColumnNum + "), th:lt(" + freezeColumnNum + ")").each(function () {
if (ColumnsNumber >= freezeColumnNum)
return;
 
ColumnsWidth += $(this).outerWidth(true);
 
ColumnsNumber += $(this).attr('colSpan') ? parseInt($(this).attr('colSpan')) : 1;
});
ColumnsWidth += 2;
 
divTableColumn.css("width", ColumnsWidth);
divTableFix != null && divTableFix.css("width", ColumnsWidth);
}
 
divTableData.scroll(function () {
divTableHead != null && divTableHead.scrollLeft(divTableData.scrollLeft());
 
divTableColumn != null && divTableColumn.scrollTop(divTableData.scrollTop());
});
 
divTableFix != null && divTableFix.css({ "overflow": "hidden", "position": "absolute", "z-index": "50" });
divTableHead != null && divTableHead.css({ "overflow": "hidden", "width": width - 17, "position": "absolute", "z-index": "45" });
divTableColumn != null && divTableColumn.css({ "overflow": "hidden", "height": height - 17, "position": "absolute", "z-index": "40" });
divTableData.css({ "overflow": "scroll", "width": width, "height": height, "position": "absolute" });
 
divTableFix != null && divTableFix.offset(divTableLayout.offset());
divTableHead != null && divTableHead.offset(divTableLayout.offset());
divTableColumn != null && divTableColumn.offset(divTableLayout.offset());
divTableData.offset(divTableLayout.offset());
}
 
/*
* 调整锁定表的宽度和高度，这个函数在resize事件中调用
*
* 参数定义
* table - 要锁定的表格元素或者表格ID
* width - 表格的滚动区域宽度
* height - 表格的滚动区域高度
*/
function adjustTableSize(table, width, height) {
var tableId;
if (typeof(table) == 'string')
tableId = table;
else
tableId = table.attr('id');
 
$("#" + tableId + "_tableLayout").width(width).height(height);
$("#" + tableId + "_tableHead").width(width - 17);
$("#" + tableId + "_tableColumn").height(height - 17);
$("#" + tableId + "_tableData").width(width).height(height);
}
 
function pageHeight() {
if ($.browser.msie) {
return document.compatMode == "CSS1Compat" ? document.documentElement.clientHeight : document.body.clientHeight;
} else {
return self.innerHeight;
}
};
 
//返回当前页面宽度
function pageWidth() {
if ($.browser.msie) {
return document.compatMode == "CSS1Compat" ? document.documentElement.clientWidth : document.body.clientWidth;
} else {
return self.innerWidth;
}
};
 
$(document).ready(function() {
var table = $("table");
var tableId = table.attr('id');
var freezeRowNum = table.attr('freezeRowNum');
var freezeColumnNum = table.attr('freezeColumnNum');
 
if (typeof(freezeRowNum) != 'undefined' || typeof(freezeColumnNum) != 'undefined') {
freezeTable(table, freezeRowNum || 0, freezeColumnNum || 0, pageWidth(), pageHeight());
 
var flag = false;
$(window).resize(function() {
if (flag)
return ;
 
setTimeout(function() {
adjustTableSize(tableId, pageWidth(), pageHeight());
flag = false;
}, 100);
 
flag = true;
});
}
});