public override Widget build(BuildContext context)
{
D.assert(material_.debugCheckHasMaterialLocalizations(context));
ThemeData themeData = Theme.of(context);
MaterialLocalizations localizations = MaterialLocalizations.of(context);
List <Widget> headerWidgets = new List <Widget>();
float startPadding = 24.0f;
if (_selectedRowCount == 0)
{
headerWidgets.Add(new Expanded(child: widget.header));
if (widget.header is ButtonBar)
{
startPadding = 12.0f;
}
}
else
{
headerWidgets.Add(new Expanded(
child: new Text(localizations.selectedRowCountTitle(_selectedRowCount))
));
}
if (widget.actions != null)
{
headerWidgets.AddRange(
LinqUtils <Widget> .SelectList(widget.actions, ((Widget action) => {
return(new Padding(
padding: EdgeInsetsDirectional.only(
start: 24.0f - 8.0f * 2.0f),
child: action
));
}))
);
}
TextStyle footerTextStyle = themeData.textTheme.caption;
List <Widget> footerWidgets = new List <Widget>();
if (widget.onRowsPerPageChanged != null)
{
List <Widget> availableRowsPerPage = LinqUtils <Widget, int> .SelectList(
LinqUtils <int> .WhereList(widget.availableRowsPerPage, ((int value) => value <= _rowCount || value == widget.rowsPerPage)),
(int value) => {
return((Widget) new DropdownMenuItem <int>(
value: value,
child: new Text($"{value}")
));
});
footerWidgets.AddRange(new List <Widget>()
{
new Container(width: 14.0f), // to match trailing padding in case we overflow and end up scrolling
new Text(localizations.rowsPerPageTitle),
new ConstrainedBox(
constraints: new BoxConstraints(minWidth: 64.0f), // 40.0 for the text, 24.0 for the icon
child: new Align(
alignment: AlignmentDirectional.centerEnd,
child: new DropdownButtonHideUnderline(
child: new DropdownButton <int>(
items: availableRowsPerPage.Cast <DropdownMenuItem <int> >().ToList(),
value: widget.rowsPerPage,
onChanged: widget.onRowsPerPageChanged,
style: footerTextStyle,
iconSize: 24.0f
)
)
)
),
});
}
footerWidgets.AddRange(new List <Widget>()
{
new Container(width: 32.0f),
new Text(
localizations.pageRowsInfoTitle(
_firstRowIndex + 1,
_firstRowIndex + widget.rowsPerPage,
_rowCount,
_rowCountApproximate
)
),
new Container(width: 32.0f),
new IconButton(
icon: new Icon(Icons.chevron_left),
padding: EdgeInsets.zero,
tooltip:
localizations.previousPageTooltip,
onPressed: _firstRowIndex <= 0 ? (VoidCallback)null : _handlePrevious),
new Container(width: 24.0f),
new IconButton(
icon: new Icon(Icons.chevron_right),
padding: EdgeInsets.zero,
tooltip:
localizations.nextPageTooltip,
onPressed: (!_rowCountApproximate && (_firstRowIndex + widget.rowsPerPage >= _rowCount))
? (VoidCallback)null
: _handleNext
),
new Container(width: 14.0f),
});
return(new LayoutBuilder(
builder: (BuildContext _context, BoxConstraints constraints) => {
return new Card(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: new List <Widget> {
new DefaultTextStyle(
style: _selectedRowCount > 0
? themeData.textTheme.subtitle1.copyWith(color: themeData.accentColor)
: themeData.textTheme.headline6.copyWith(fontWeight: FontWeight.w400),
child: IconTheme.merge(
data: new IconThemeData(
opacity: 0.54f
),
child: new Ink(
height: 64.0f,
color: _selectedRowCount > 0 ? themeData.secondaryHeaderColor : null,
child: new Padding(
padding: EdgeInsetsDirectional.only(
start: startPadding, end: 14.0f),
child: new Row(
mainAxisAlignment: MainAxisAlignment.end,
children: headerWidgets
)
)
)
)
),
new SingleChildScrollView(
scrollDirection: Axis.horizontal,
dragStartBehavior: widget.dragStartBehavior,
child: new ConstrainedBox(
constraints: new BoxConstraints(minWidth: constraints.minWidth),
child: new DataTable(
key: _tableKey,
columns: widget.columns,
sortColumnIndex: widget.sortColumnIndex,
sortAscending: widget.sortAscending,
onSelectAll: widget.onSelectAll,
dataRowHeight: widget.dataRowHeight,
headingRowHeight: widget.headingRowHeight,
horizontalMargin: widget.horizontalMargin,
columnSpacing: widget.columnSpacing,
rows: _getRows(_firstRowIndex, widget.rowsPerPage)
)
)
),
new DefaultTextStyle(
style: footerTextStyle,
child: IconTheme.merge(
data: new IconThemeData(
opacity: 0.54f
),
child:
new Container(
height: 56.0f,
child: new SingleChildScrollView(
dragStartBehavior: widget.dragStartBehavior,
scrollDirection: Axis.horizontal,
reverse: true,
child: new Row(
children: footerWidgets
)
)
)
)
)
}
)
);
}
));
}
