<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"><meta name="description" content="API docs for the DataTable constructor from the Class DataTable class from the material library, for the Dart programming language."><title>DataTable constructor - DataTable class - material library - Dart API</title><!-- required because all the links are pseudo-absolute --><base href="../.."><link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500,400i,400,300|Source+Sans+Pro:400,300,700" rel="stylesheet"><link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet"><link rel="stylesheet" href="static-assets/github.css"><link rel="stylesheet" href="static-assets/styles.css"><link rel="icon" href="static-assets/favicon.png"></head><body><div id="overlay-under-drawer"></div><header id="title"><button id="sidenav-left-toggle" type="button"> </button><ol class="breadcrumbs gt-separated dark hidden-xs"><li><a href="index.html">flutter</a></li><li><a href="material/material-library.html">material</a></li><li><a href="material/DataTable-class.html">DataTable</a></li><li class="self-crumb">DataTable constructor</li></ol><div class="self-name">DataTable</div><form class="search navbar-right" role="search"><input type="text" id="search-box" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search..."></form></header><main><div id="dartdoc-sidebar-left" class="col-xs-6 col-sm-3 col-md-2 sidebar sidebar-offcanvas-left"><header id="header-search-sidebar" class="hidden-l"><form class="search-sidebar" role="search"><input type="text" id="search-sidebar" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search..."></form></header><ol class="breadcrumbs gt-separated dark hidden-l" id="sidebar-nav"><li><a href="index.html">flutter</a></li><li><a href="material/material-library.html">material</a></li><li><a href="material/DataTable-class.html">DataTable</a></li><li class="self-crumb">DataTable constructor</li></ol><h5>DataTable class</h5><ol><li class="section-title"><a href="material/DataTable-class.html#constructors">Constructors</a></li><li><a href="material/DataTable/DataTable.html">DataTable</a></li><li class="section-title"><a href="material/DataTable-class.html#instance-properties">Properties</a></li><li><a href="material/DataTable/columns.html">columns</a></li><li><a href="material/DataTable/columnSpacing.html">columnSpacing</a></li><li><a href="material/DataTable/dataRowHeight.html">dataRowHeight</a></li><li><a href="material/DataTable/headingRowHeight.html">headingRowHeight</a></li><li><a href="material/DataTable/horizontalMargin.html">horizontalMargin</a></li><li><a href="material/DataTable/onSelectAll.html">onSelectAll</a></li><li><a href="material/DataTable/rows.html">rows</a></li><li><a href="material/DataTable/sortAscending.html">sortAscending</a></li><li><a href="material/DataTable/sortColumnIndex.html">sortColumnIndex</a></li><li class="inherited"><a href="dart-core/Object/hashCode.html">hashCode</a></li><li class="inherited"><a href="widgets/Widget/key.html">key</a></li><li class="inherited"><a href="dart-core/Object/runtimeType.html">runtimeType</a></li><li class="section-title"><a href="material/DataTable-class.html#instance-methods">Methods</a></li><li><a href="material/DataTable/build.html">build</a></li><li class="inherited"><a href="widgets/StatelessWidget/createElement.html">createElement</a></li><li class="inherited"><a href="foundation/DiagnosticableTree/debugDescribeChildren.html">debugDescribeChildren</a></li><li class="inherited"><a href="widgets/Widget/debugFillProperties.html">debugFillProperties</a></li><li class="inherited"><a href="dart-core/Object/noSuchMethod.html">noSuchMethod</a></li><li 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id="-param-key"><span class="type-annotation"><a href="foundation/Key-class.html">Key</a></span> <span class="parameter-name">key</span>, </span> <span class="parameter" id="-param-columns"><span>@required</span> <span class="type-annotation"><a href="dart-core/List-class.html">List</a><span class="signature"><<wbr><span class="type-parameter"><a href="material/DataColumn-class.html">DataColumn</a></span>></span></span> <span class="parameter-name">columns</span>, </span> <span class="parameter" id="-param-sortColumnIndex"><span class="type-annotation"><a href="dart-core/int-class.html">int</a></span> <span class="parameter-name">sortColumnIndex</span>, </span> <span class="parameter" id="-param-sortAscending"><span class="type-annotation"><a href="dart-core/bool-class.html">bool</a></span> <span class="parameter-name">sortAscending</span>: <span class="default-value">true</span>, </span> <span class="parameter" id="-param-onSelectAll"><span class="type-annotation"><a href="foundation/ValueSetter.html">ValueSetter</a><span class="signature"><<wbr><span class="type-parameter"><a href="dart-core/bool-class.html">bool</a></span>></span></span> <span class="parameter-name">onSelectAll</span>, </span> <span class="parameter" id="-param-dataRowHeight"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">dataRowHeight</span>: <span class="default-value">kMinInteractiveDimension</span>, </span> <span class="parameter" id="-param-headingRowHeight"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">headingRowHeight</span>: <span class="default-value">56.0</span>, </span> <span class="parameter" id="-param-horizontalMargin"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">horizontalMargin</span>: <span class="default-value">24.0</span>, </span> <span class="parameter" id="-param-columnSpacing"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">columnSpacing</span>: <span class="default-value">56.0</span>, </span> <span class="parameter" id="-param-rows"><span>@required</span> <span class="type-annotation"><a href="dart-core/List-class.html">List</a><span class="signature"><<wbr><span class="type-parameter"><a href="material/DataRow-class.html">DataRow</a></span>></span></span> <span class="parameter-name">rows</span></span> })</section><section class="desc markdown"><p>Creates a widget describing a data table.</p><p>The <code>columns</code> argument must be a list of as many <a href="material/DataColumn-class.html">DataColumn</a>objects as the table is to have columns, ignoring the leadingcheckbox column if any. The <code>columns</code> argument must have alength greater than zero and must not be null.</p><p>The <code>rows</code> argument must be a list of as many <a href="material/DataRow-class.html">DataRow</a> objectsas the table is to have rows, ignoring the leading heading rowthat contains the column headings (derived from the <code>columns</code>argument). There may be zero rows, but the rows argument mustnot be null.</p><p>Each <a href="material/DataRow-class.html">DataRow</a> object in <code>rows</code> must have as many <a href="material/DataCell-class.html">DataCell</a>objects in the <a href="material/DataRow/cells.html">DataRow.cells</a> list as the table has columns.</p><p>If the table is sorted, the column that provides the currentprimary key should be specified by index in <code>sortColumnIndex</code>, 0meaning the first column in <code>columns</code>, 1 being the next one, andso forth.</p><p>The actual sort order can be specified using <code>sortAscending</code>; ifthe sort order is ascending, this should be true (the default),otherwise it should be false.</p></section><section class="summary source-code" id="source"><h2><span>Implementation</span></h2><pre class="language-dart"><code class="language-dart">DataTable({Key key,@required this.columns,this.sortColumnIndex,this.sortAscending = true,this.onSelectAll,this.dataRowHeight = kMinInteractiveDimension,this.headingRowHeight = 56.0,this.horizontalMargin = 24.0,this.columnSpacing = 56.0,@required this.rows,}) : assert(columns != null),assert(columns.isNotEmpty),assert(sortColumnIndex == null || (sortColumnIndex >= 0 && sortColumnIndex < columns.length)),assert(sortAscending != null),assert(dataRowHeight != null),assert(headingRowHeight != null),assert(horizontalMargin != null),assert(columnSpacing != null),assert(rows != null),assert(!rows.any((DataRow row) => row.cells.length != columns.length)),_onlyTextColumn = _initOnlyTextColumn(columns),super(key: key);</code></pre></section></div> <!-- /.main-content --><div id="dartdoc-sidebar-right" class="col-xs-6 col-sm-6 col-md-2 sidebar sidebar-offcanvas-right"></div><!--/.sidebar-offcanvas--></main><footer><span class="no-break">flutter 0.0.0-unknown</span></footer><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script><script src="static-assets/typeahead.bundle.min.js"></script><script src="static-assets/highlight.pack.js"></script><script src="static-assets/URI.js"></script><script src="static-assets/script.js"></script></body></html>
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