jquery-easyui-datagridview datagrid-detailview.js升级自定义展开按钮功能

jquery-easyui的扩展组件jquery-easyui-datagridview，其中的datagrid-detailview.js可方便地生成子网格，但是每行均默认生成展开按钮，实际我们希望对某些行不显示展开按钮，网上很多人提供的解决方案就是通过dom操作将生成的展开按钮删除掉，但是这个展开按钮是动态生成的，通过dom不好查找。我将 datagrid-detailview.js文件进行了升级修改，支持用户通过表格列定义以及数据值来动态生成展开按钮，非常方便。
共享给大家。

subgrid默认展开按钮，每行均显示：

使用修改后的组件，展开图标可设定列位置，可根据行数据值自动显示和隐藏。

使用方法：

列定义：

columns:[[
                {field:'exp',title:'展开',width:25,expander:true},
                  ...
                ]],

行数据赋值：exp:true 或者 exp:false

完整代码：

下载地址：https://download.csdn.net/download/benxuu/11080025

[code]//修改说明：支持用户通过数据自定义网格行显示展开图标。
//配置方法：定义展开图标列，添加属性expender:true；配置此项则不再默认生成左侧的展开按钮！而是在用户定义的列显示
//行记录对应展开图标列数据值为true时，显示图标，为false时，不显示。
//欢迎继续修改，或反馈给我
//Updated by Ben
//2019.4.1 benxuu@163.com

$.extend($.fn.datagrid.defaults, {
autoUpdateDetail: true  // Define if update the row detail content when update a row
});

var detailview = $.extend({}, $.fn.datagrid.defaults.view, {
render: function(target, container, frozen){
var state = $.data(target, 'datagrid');
var opts = state.options;
if (frozen){
if (!(opts.rownumbers || (opts.frozenColumns && opts.frozenColumns.length))){
return;
}
}

var rows = state.data.rows;
var fields = $(target).datagrid('getColumnFields', frozen);
var table = [];
table.push('<table class="datagrid-btable" cellspacing="0" cellpadding="0" border="0"><tbody>');
for(var i=0; i<rows.length; i++) {
// get the class and style attributes for this row
var css = opts.rowStyler ? opts.rowStyler.call(target, i, rows[i]) : '';
var classValue = '';
var styleValue = '';
if (typeof css == 'string'){
styleValue = css;
} else if (css){
classValue = css['class'] || '';
styleValue = css['style'] || '';
}

var cls = 'class="datagrid-row ' + (i % 2 && opts.striped ? 'datagrid-row-alt ' : ' ') + classValue + '"';
var style = styleValue ? 'style="' + styleValue + '"' : '';
var rowId = state.rowIdPrefix + '-' + (frozen?1:2) + '-' + i;
table.push('<tr id="' + rowId + '" datagrid-row-index="' + i + '" ' + cls + ' ' + style + '>');
table.push(this.renderRow.call(this, target, fields, frozen, i, rows[i]));
table.push('</tr>');

table.push('<tr style="display:none;">');
if (frozen){
table.push('<td colspan=' + (fields.length+(opts.rownumbers?1:0)) + ' style="border-right:0">');
} else {
table.push('<td colspan=' + (fields.length) + '>');
}

table.push('<div class="datagrid-row-detail">');
if (frozen){
table.push('&nbsp;');
} else {
table.push(opts.detailFormatter.call(target, i, rows[i]));
}
table.push('</div>');

table.push('</td>');
table.push('</tr>');

}
table.push('</tbody></table>');

$(container).html(table.join(''));
},

renderRow: function(target, fields, frozen, rowIndex, rowData){
var opts = $.data(target, 'datagrid').options;

var cc = [];
if (frozen && opts.rownumbers){
var rownumber = rowIndex + 1;
if (opts.pagination){
rownumber += (opts.pageNumber-1)*opts.pageSize;
}
cc.push('<td class="datagrid-td-rownumber"><div class="datagrid-cell-rownumber">'+rownumber+'</div></td>');
}
for(var i=0; i<fields.length; i++){
var field = fields[i];
var col = $(target).datagrid('getColumnOption', field);
if (col){
var value = rowData[field];	// the field value
var css = col.styler ? (col.styler(value, rowData, rowIndex)||'') : '';
var classValue = '';
var styleValue = '';
if (typeof css == 'string'){
styleValue = css;
} else if (cc){
classValue = css['class'] || '';
styleValue = css['style'] || '';
}
var cls = classValue ? 'class="' + classValue + '"' : '';
var style = col.hidden ? 'style="display:none;' + styleValue + '"' : (styleValue ? 'style="' + styleValue + '"' : '');

cc.push('<td field="' + field + '" ' + cls + ' ' + style + '>');

if (col.checkbox){
style = '';
} else if (col.expander){
style = "text-align:center;height:16px;";
} else {
style = styleValue;
if (col.align){style += ';text-align:' + col.align + ';'}
if (!opts.nowrap){
style += ';white-space:normal;height:auto;';
} else if (opts.autoRowHeight){
style += ';height:auto;';
}
}

cc.push('<div style="' + style + '" ');
if (col.checkbox){
cc.push('class="datagrid-cell-check ');
} else {
cc.push('class="datagrid-cell ' + col.cellClass);
}
cc.push('">');

if (col.checkbox){
cc.push('<input type="checkbox" name="' + field + '" value="' + (value!=undefined ? value : '') + '">');
} else if (col.expander) {
//edit by Ben，根据列配置项expender为true，值以及value来决定展开按钮的呈现
if(value) {
cc.push('<span class="datagrid-row-expander datagrid-row-expand" style="display:inline-block;width:16px;height:16px;margin:0;cursor:pointer;" />');
}else{
cc.push('<span class="datagrid-row-expander datagrid-row-expand" style="display:none;width:16px;height:16px;margin:0;cursor:pointer;" />');
}
//cc.push('<div style="text-align:center;width:16px;height:16px;">');
//cc.push('</div>');
} else if (col.formatter){
cc.push(col.formatter(value, rowData, rowIndex));
} else {
cc.push(value);
}

cc.push('</div>');
cc.push('</td>');
}
}
return cc.join('');
},

insertRow: function(target, index, row){
var opts = $.data(target, 'datagrid').options;
var dc = $.data(target, 'datagrid').dc;
var panel = $(target).datagrid('getPanel');
var view1 = dc.view1;
var view2 = dc.view2;

var isAppend = false;
var rowLength = $(target).datagrid('getRows').length;
if (rowLength == 0){
$(target).datagrid('loadData',{total:1,rows:[row]});
return;
}

if (index == undefined || index == null || index >= rowLength) {
index = rowLength;
isAppend = true;
this.canUpdateDetail = false;
}

$.fn.datagrid.defaults.view.insertRow.call(this, target, index, row);

_insert(true);
_insert(false);

this.canUpdateDetail = true;

function _insert(frozen){
var tr = opts.finder.getTr(target, index, 'body', frozen?1:2);
if (isAppend){
var detail = tr.next();
var newDetail = tr.next().clone();
tr.insertAfter(detail);
} else {
var newDetail = tr.next().next().clone();
}
newDetail.insertAfter(tr);
newDetail.hide();
if (!frozen){
newDetail.find('div.datagrid-row-detail').html(opts.detailFormatter.call(target, index, row));
}
}
},

deleteRow: function(target, index){
var opts = $.data(target, 'datagrid').options;
var dc = $.data(target, 'datagrid').dc;
var tr = opts.finder.getTr(target, index);
tr.next().remove();
$.fn.datagrid.defaults.view.deleteRow.call(this, target, index);
dc.body2.triggerHandler('scroll');
},

updateRow: function(target, rowIndex, row){
var dc = $.data(target, 'datagrid').dc;
var opts = $.data(target, 'datagrid').options;
var cls = $(target).data
3ff7
grid('getExpander', rowIndex).attr('class');
$.fn.datagrid.defaults.view.updateRow.call(this, target, rowIndex, row);
$(target).datagrid('getExpander', rowIndex).attr('class',cls);

// update the detail content
if (opts.autoUpdateDetail && this.canUpdateDetail){
var row = $(target).datagrid('getRows')[rowIndex];
var detail = $(target).datagrid('getRowDetail', rowIndex);
detail.html(opts.detailFormatter.call(target, rowIndex, row));
}
},

bindEvents: function(target){
var state = $.data(target, 'datagrid');

if (state.ss.bindDetailEvents){return;}
state.ss.bindDetailEvents = true;

var dc = state.dc;
var opts = state.options;
var body = dc.body1.add(dc.body2);
var clickHandler = ($.data(body[0],'events')||$._data(body[0],'events')).click[0].handler;
body.unbind('click.detailview').bind('click.detailview', function(e){
var tt = $(e.target);
var tr = tt.closest('tr.datagrid-row');
if (!tr.length){return}
if (tt.hasClass('datagrid-row-expander')){
var rowIndex = parseInt(tr.attr('datagrid-row-index'));
if (tt.hasClass('datagrid-row-expand')){
$(target).datagrid('expandRow', rowIndex);
} else {
$(target).datagrid('collapseRow', rowIndex);
}
$(target).datagrid('fixRowHeight');
e.stopPropagation();

} else {
// clickHandler(e);
}
});
},

onBeforeRender: function(target){
var state = $.data(target, 'datagrid');
var opts = state.options;
var dc = state.dc;
var t = $(target);
var hasExpander = false;
var fields = t.datagrid('getColumnFields',true).concat(t.datagrid('getColumnFields'));
for(var i=0; i<fields.length; i++){
var col = t.datagrid('getColumnOption', fields[i]);
if (col.expander){
hasExpander = true;
break;
}
}
if (!hasExpander){
if (opts.frozenColumns && opts.frozenColumns.length){
opts.frozenColumns[0].splice(0,0,{field:'_expander',expander:true,width:24,resizable:false,fixed:true});
} else {
opts.frozenColumns = [[{field:'_expander',expander:true,width:24,resizable:false,fixed:true}]];
}

var t = dc.view1.children('div.datagrid-header').find('table');
var td = $('<td rowspan="'+opts.frozenColumns.length+'"><div class="datagrid-header-expander" style="width:24px;"></div></td>');
if ($('tr',t).length == 0){
td.wrap('<tr></tr>').parent().appendTo($('tbody',t));
} else if (opts.rownumbers){
td.insertAfter(t.find('td:has(div.datagrid-header-rownumber)'));
} else {
td.prependTo(t.find('tr:first'));
}
}

// if (!state.bindDetailEvents){
// 	state.bindDetailEvents = true;
// 	var that = this;
// 	setTimeout(function(){
// 		that.bindEvents(target);
// 	},0);
// }
},

onAfterRender: function(target){
var that = this;
var state = $.data(target, 'datagrid');
var dc = state.dc;
var opts = state.options;
var panel = $(target).datagrid('getPanel');

$.fn.datagrid.defaults.view.onAfterRender.call(this, target);

if (!state.onResizeColumn){
state.onResizeColumn = opts.onResizeColumn;
opts.onResizeColumn = function(field, width){
if (!opts.fitColumns){
resizeDetails();
}
var rowCount = $(target).datagrid('getRows').length;
for(var i=0; i<rowCount; i++){
$(target).datagrid('fixDetailRowHeight', i);
}

// call the old event code
state.onResizeColumn.call(target, field, width);
};
}
if (!state.onResize){
state.onResize = opts.onResize;
opts.onResize = function(width, height){
if (opts.fitColumns){
resizeDetails();
}
state.onResize.call(panel, width, height);
};
}

// function resizeDetails(){
// 	var details = dc.body2.find('>table.datagrid-btable>tbody>tr>td>div.datagrid-row-detail:visible');
// 	if (details.length){
// 		var ww = 0;
// 		dc.header2.find('.datagrid-header-check:visible,.datagrid-cell:visible').each(function(){
// 			ww += $(this).outerWidth(true) + 1;
// 		});
// 		if (ww != details.outerWidth(true)){
// 			details._outerWidth(ww);
// 			details.find('.easyui-fluid').trigger('_resize');
// 		}
// 	}
// }
function resizeDetails(){
var details = dc.body2.find('>table.datagrid-btable>tbody>tr>td>div.datagrid-row-detail:visible');
if (details.length){
var ww = 0;
// dc.header2.find('.datagrid-header-check:visible,.datagrid-cell:visible').each(function(){
// 	ww += $(this).outerWidth(true) + 1;
// });
dc.body2.find('>table.datagrid-btable>tbody>tr:visible:first').find('.datagrid-cell-check:visible,.datagrid-cell:visible').each(function(){
ww += $(this).outerWidth(true) + 1;
});
if (ww != details.outerWidth(true)){
details._outerWidth(ww);
details.find('.easyui-fluid').trigger('_resize');
}
}
}

this.canUpdateDetail = true;	// define if to update the detail content when 'updateRow' method is called;

var footer = dc.footer1.add(dc.footer2);
footer.find('span.datagrid-row-expander').css('visibility', 'hidden');
$(target).datagrid('resize');

this.bindEvents(target);
var detail = dc.body1.add(dc.body2).find('div.datagrid-row-detail');
detail.unbind().bind('mouseover mouseout click dblclick contextmenu scroll', function(e){
e.stopPropagation();
});
}
});

$.extend($.fn.datagrid.methods, {
fixDetailRowHeight: function(jq, index){
return jq.each(function(){
var opts = $.data(this, 'datagrid').options;
if (!(opts.rownumbers || (opts.frozenColumns && opts.frozenColumns.length))){
return;
}
var dc = $.data(this, 'datagrid').dc;
var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
// fix the detail row height
if (tr2.is(':visible')){
tr1.css('height', '');
tr2.css('height', '');
var height = Math.max(tr1.height(), tr2.height());
tr1.css('height', height);
tr2.css('height', height);
}
dc.body2.triggerHandler('scroll');
});
},
getExpander: function(jq, index){	// get row expander object
var opts = $.data(jq[0], 'datagrid').options;
return opts.finder.getTr(jq[0], index).find('span.datagrid-row-expander');
},
// get row detail container
getRowDetail: function(jq, index){
var opts = $.data(jq[0], 'datagrid').options;
var tr = opts.finder.getTr(jq[0], index, 'body', 2);
// return tr.next().find('div.datagrid-row-detail');
return tr.next().find('>td>div.datagrid-row-detail');
},
expandRow: function(jq, index){
return jq.each(function(){
var opts = $(this).datagrid('options');
var dc = $.data(this, 'datagrid').dc;
var expander = $(this).datagrid('getExpander', index);
if (expander.hasClass('datagrid-row-expand')){
expander.removeClass('datagrid-row-expand').addClass('datagrid-row-collapse');
var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
tr1.show();
tr2.show();
$(this).datagrid('fixDetailRowHeight', index);
if (opts.onExpandRow){
var row = $(this).datagrid('getRows')[index];
opts.onExpandRow.call(this, index, row);
}
}
});
},
collapseRow: function(jq, index){
return jq.each(function(){
var opts = $(this).datagrid('options');
var dc = $.data(this, 'datagrid').dc;
var expander = $(this).datagrid('getExpander', index);
if (expander.hasClass('datagrid-row-collapse')){
expander.removeClass('datagrid-row-collapse').addClass('datagrid-row-expand');
var tr1 = opts.finder.getTr(this, index, 'body', 1).next();
var tr2 = opts.finder.getTr(this, index, 'body', 2).next();
tr1.hide();
tr2.hide();
dc.body2.triggerHandler('scroll');
if (opts.onCollapseRow){
var row = $(this).datagrid('getRows')[index];
opts.onCollapseRow.call(this, index, row);
}
}
});
}
});

$.extend($.fn.datagrid.methods, {
subgrid: function(jq, conf){
return jq.each(function(){
createGrid(this, conf);

function createGrid(target, conf, prow){
var queryParams = $.extend({}, conf.options.queryParams||{});
// queryParams[conf.options.foreignField] = prow ? prow[conf.options.foreignField] : undefined;
if (prow){
var fk = conf.options.foreignField;
if ($.isFunction(fk)){
$.extend(queryParams, fk.call(conf, prow));
} else {
queryParams[fk] = prow[fk];
}
}

var plugin = conf.options.edatagrid ? 'edatagrid' : 'datagrid';

$(target)[plugin]($.extend({}, conf.options, {
subgrid: conf.subgrid,
view: (conf.subgrid ? detailview : undefined),
queryParams: queryParams,
detailFormatter: function(index, row){
return '<div><table class="datagrid-subgrid"></table></div>';
},
onExpandRow: function(index, row){
var opts = $(this).datagrid('options');
var rd = $(this).datagrid('getRowDetail', index);
var dg = getSubGrid(rd);
if (!dg.data('datagrid')){
createGrid(dg[0], opts.subgrid, row);
}
rd.find('.easyui-fluid').trigger('_resize');
setHeight(this, index);
if (conf.options.onExpandRow){
conf.options.onExpandRow.call(this, index, row);
}
},
onCollapseRow: function(index, row){
setHeight(this, index);
if (conf.options.onCollapseRow){
conf.options.onCollapseRow.call(this, index, row);
}
},
onResize: function(){
var dg = $(this).children('div.datagrid-view').children('table')
setParentHeight(this);
},
onResizeColumn: function(field, width){
setParentHeight(this);
if (conf.options.onResizeColumn){
conf.options.onResizeColumn.call(this, field, width);
}
},
onLoadSuccess: function(data){
setParentHeight(this);
if (conf.options.onLoadSuccess){
conf.options.onLoadSuccess.call(this, data);
}
}
}));
}
function getSubGrid(rowDetail){
var div = $(rowDetail).children('div');
if (div.children('div.datagrid').length){
return div.find('>div.datagrid>div.panel-body>div.datagrid-view>table.datagrid-subgrid');
} else {
return div.find('>table.datagrid-subgrid');
}
}
function setParentHeight(target){
var tr = $(target).closest('div.datagrid-row-detail').closest('tr').prev();
if (tr.length){
var index = parseInt(tr.attr('datagrid-row-index'));
var dg = tr.closest('div.datagrid-view').children('table');
setHeight(dg[0], index);
}
}
function setHeight(target, index){
$(target).datagrid('fixDetailRowHeight', index);
$(target).datagrid('fixRowHeight', index);
var tr = $(target).closest('div.datagrid-row-detail').closest('tr').prev();
if (tr.length){
var index = parseInt(tr.attr('datagrid-row-index'));
var dg = tr.closest('div.datagrid-view').children('table');
setHeight(dg[0], index);
}
}
});
},
getSelfGrid: function(jq){
var grid = jq.closest('.datagrid');
if (grid.length){
return grid.find('>.datagrid-wrap>.datagrid-view>.datagrid-f');
} else {
return null;
}
},
getParentGrid: function(jq){
var detail = jq.closest('div.datagrid-row-detail');
if (detail.length){
return detail.closest('.datagrid-view').children('.datagrid-f');
} else {
return null;
}
},
getParentRowIndex: function(jq){
var detail = jq.closest('div.datagrid-row-detail');
if (detail.length){
var tr = detail.closest('tr').prev();
return parseInt(tr.attr('datagrid-row-index'));
} else {
return -1;
}
}
});

下载地址：https://download.csdn.net/download/benxuu/11080025