客戶要求實作對表格資料的頭幾行或者頭幾列進行當機,即滾動時保持這幾行/列不動,通過網上查找代碼,參考已有的代碼的思路,實作了可以任意對行、列進行當機。
實作原理:
建立多個div,div之間通過css實作層疊,每個div放置目前表格的克隆。例如:需要行當機時,建立存放當機行表格的div,通過設定z-index屬性和position屬性,讓當機行表格在資料表格的上層。同理,需要列當機時,建立存放當機清單格的div,并放置在資料表格的上層。如果需要行列都當機時,則除了建立當機行、當機清單格的div,還需要建立左上角的固定行清單格的div,并放置在所有div的最上層。
處理表格的滾動事件,在表格橫向或者縱向滾動時,同時讓相應的當機行和當機列也同步滾動。
處理html的resize事件,同步修改表格的滾動區域寬度和高度
代碼如下
/*
* 鎖定表頭和列
*
* 參數定義
* table - 要鎖定的表格元素或者表格ID
* freezeRowNum - 要鎖定的前幾行行數,如果行不鎖定,則設定為0
* freezeColumnNum - 要鎖定的前幾列列數,如果列不鎖定,則設定為0
* width - 表格的滾動區域寬度
* height - 表格的滾動區域高度
*/
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());
}
/*
* 調整鎖定表的寬度和高度,這個函數在resize事件中調用
*
* 參數定義
* table - 要鎖定的表格元素或者表格ID
* width - 表格的滾動區域寬度
* height - 表格的滾動區域高度
*/
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;
}
};
//傳回目前頁面寬度
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;
});
}
});
使用時,隻要在table元素設定freezeRowNum和freezeColumnNum屬性值,即可實作當機效果
<table id="reportTable" width="1900" freezeRowNum="2" freezeColumnNum="2" class="report" align="center">
...
</table>
![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiInBnauIGM4EGOjdDM4UWOj1iZwATYtkTNwMTLldzN30SNwQjMwYzY18CX1MDM48CX0gDMw8CX05WZth2YhRHdh9CXkF2bsBXdvwVbvNmLllXZ0lmLywGZvw1LcpDc0RHaiojIsJye.jpg)
調試時發現在ie7下改變頁面尺寸時,不能改變滾動區域的尺寸,一直不好解決,請大家幫着看看代碼如何修改
注:上面問題已解決,代碼已修改