public override Widget build(BuildContext context)
{
D.assert(!_debugInteractive || material_.debugCheckHasMaterial(context));
ThemeData theme = Theme.of(context);
BoxDecoration _kSelectedDecoration = new BoxDecoration(
border: new Border(bottom: Divider.createBorderSide(context, width: dividerThickness)),
// The backgroundColor has to be transparent so you can see the ink on the material
color: (Theme.of(context).brightness == Brightness.light) ? _grey100Opacity : _grey300Opacity
);
BoxDecoration _kUnselectedDecoration = new BoxDecoration(
border: new Border(bottom: Divider.createBorderSide(context, width: dividerThickness))
);
bool displayCheckboxColumn =
showCheckboxColumn && rows.Any((DataRow row) => row.onSelectChanged != null);
bool allChecked = displayCheckboxColumn &&
!rows.Any((DataRow row) => row.onSelectChanged != null && !row.selected);
List <TableColumnWidth> tableColumns =
new List <TableColumnWidth>(new TableColumnWidth[columns.Count + (displayCheckboxColumn ? 1 : 0)]);
List <TableRow> tableRows = LinqUtils <TableRow, int> .SelectList(Enumerable.Range(0, rows.Count + 1), (index) => {
return(new TableRow(
key: index == 0 ? _headingRowKey : rows[index - 1].key,
decoration: index > 0 && rows[index - 1].selected
? _kSelectedDecoration
: _kUnselectedDecoration,
children: new List <Widget>(new Widget[tableColumns.Count])
));
});
int rowIndex;
int displayColumnIndex = 0;
if (displayCheckboxColumn)
{
tableColumns[0] = new FixedColumnWidth(horizontalMargin + Checkbox.width + horizontalMargin / 2.0f);
tableRows[0].children[0] = _buildCheckbox(
color: theme.accentColor,
isChecked: allChecked,
onCheckboxChanged: _check => _handleSelectAll(_check ?? false)
);
rowIndex = 1;
foreach (DataRow row in rows)
{
tableRows[rowIndex].children[0] = _buildCheckbox(
color: theme.accentColor,
isChecked: row.selected,
onRowTap: () => {
if (row.onSelectChanged != null)
{
row.onSelectChanged(!row.selected);
}
},
onCheckboxChanged: _select => row.onSelectChanged(_select ?? false)
);
rowIndex += 1;
}
displayColumnIndex += 1;
}
for (int dataColumnIndex = 0; dataColumnIndex < columns.Count; dataColumnIndex += 1)
{
DataColumn column = columns[dataColumnIndex];
float paddingStart;
if (dataColumnIndex == 0 && displayCheckboxColumn)
{
paddingStart = horizontalMargin / 2.0f;
}
else if (dataColumnIndex == 0 && !displayCheckboxColumn)
{
paddingStart = horizontalMargin;
}
else
{
paddingStart = columnSpacing / 2.0f;
}
float paddingEnd;
if (dataColumnIndex == columns.Count - 1)
{
paddingEnd = horizontalMargin;
}
else
{
paddingEnd = columnSpacing / 2.0f;
}
EdgeInsetsDirectional padding = EdgeInsetsDirectional.only(
start: paddingStart,
end: paddingEnd
);
if (dataColumnIndex == _onlyTextColumn)
{
tableColumns[displayColumnIndex] = new IntrinsicColumnWidth(flex: 1.0f);
}
else
{
tableColumns[displayColumnIndex] = new IntrinsicColumnWidth();
}
var currentColumnIndex = dataColumnIndex;
tableRows[0].children[displayColumnIndex] = _buildHeadingCell(
context: context,
padding: padding,
label: column.label,
tooltip: column.tooltip,
numeric: column.numeric,
onSort: column.onSort != null
? () => column.onSort(currentColumnIndex, sortColumnIndex != currentColumnIndex || !sortAscending)
: (VoidCallback)null,
sorted: dataColumnIndex == sortColumnIndex,
ascending: sortAscending
);
rowIndex = 1;
foreach (DataRow row in rows)
{
DataCell cell = row.cells[dataColumnIndex];
var curRow = row;
tableRows[rowIndex].children[displayColumnIndex] = _buildDataCell(
context: context,
padding: padding,
label: cell.child,
numeric: column.numeric,
placeholder: cell.placeholder,
showEditIcon: cell.showEditIcon,
onTap: cell.onTap,
onSelectChanged: () => {
if (curRow.onSelectChanged != null)
{
curRow.onSelectChanged(!curRow.selected);
}
});
rowIndex += 1;
}
displayColumnIndex += 1;
}
return(new Table(
columnWidths: LinqUtils <int, TableColumnWidth> .SelectDictionary(tableColumns, ((TableColumnWidth x) => tableColumns.IndexOf(x))),
children: tableRows
));
}
