buildTableWhenReady method

Widget buildTableWhenReady(BoxConstraints constraints, { bool loading = false, })

Original build method from the Flutter PageinatedDataTable

Implementation

Widget buildTableWhenReady(
  BoxConstraints constraints, {
  bool loading = false,
}) {
  assert(debugCheckHasMaterialLocalizations(context));
  final themeData = Theme.of(context);
  final localizations = MaterialLocalizations.of(context);
  // HEADER
  final headerWidgets = <Widget>[];
  var startPadding = 24.0;
  if (_selectedRowCount == 0 && widget.header != null) {
    headerWidgets.add(Expanded(child: widget.header!));
    if (widget.header is ButtonBar) {
      // We adjust the padding when a button bar is present, because the
      // ButtonBar introduces 2 pixels of outside padding, plus 2 pixels
      // around each button on each side, and the button itself will have 8
      // pixels internally on each side, yet we want the left edge of the
      // inside of the button to line up with the 24.0 left inset.
      startPadding = 12.0;
    }
  } else if (widget.header != null) {
    headerWidgets.add(
      Expanded(
        child: Text(localizations.selectedRowCountTitle(_selectedRowCount)),
      ),
    );
  }
  if (widget.actions != null) {
    headerWidgets.addAll(
      widget.actions!.map<Widget>((Widget action) {
        return Padding(
          // 8.0 is the default padding of an icon button
          padding: const EdgeInsetsDirectional.only(start: 24.0 - 8.0 * 2.0),
          child: action,
        );
      }).toList(),
    );
  }

  return Stack(
    children: [
      Scrollbar(
        controller: scroller,
        thumbVisibility: widget.showHorizontalScrollbarAlways,
        child: Card(
          semanticContainer: false,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              if (headerWidgets.isNotEmpty)
                Semantics(
                  container: true,
                  child: DefaultTextStyle(
                    // These typographic styles aren't quite the regular ones. We pick the closest ones from the regular
                    // list and then tweak them appropriately.
                    // See https://material.io/design/components/data-tables.html#tables-within-cards
                    style: _selectedRowCount > 0
                        ? themeData.textTheme.subtitle1!
                            .copyWith(color: themeData.colorScheme.secondary)
                        : themeData.textTheme.headline6!
                            .copyWith(fontWeight: FontWeight.w400),
                    child: IconTheme.merge(
                      data: const IconThemeData(
                        opacity: 0.54,
                      ),
                      child: Ink(
                        height: 64.0,
                        color: _selectedRowCount > 0
                            ? themeData.secondaryHeaderColor
                            : null,
                        child: Padding(
                          padding: EdgeInsetsDirectional.only(
                            start: startPadding,
                            end: 14.0,
                          ),
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.end,
                            children: headerWidgets,
                          ),
                        ),
                      ),
                    ),
                  ),
                ),
              SingleChildScrollView(
                controller: scroller,
                scrollDirection: Axis.horizontal,
                dragStartBehavior: widget.dragStartBehavior,
                child: ConstrainedBox(
                  constraints: BoxConstraints(minWidth: constraints.maxWidth),
                  child: DataTable(
                    key: _tableKey,
                    columns: widget.columns,
                    sortColumnIndex: widget.sortColumnIndex,
                    sortAscending: widget.sortAscending,
                    onSelectAll: widget.onSelectAll,
                    // Make sure no decoration is set on the DataTable
                    // from the theme, as its already wrapped in a Card.
                    decoration: const BoxDecoration(),
                    dataRowHeight: widget.dataRowHeight,
                    headingRowHeight: widget.headingRowHeight,
                    horizontalMargin: widget.horizontalMargin,
                    columnSpacing: widget.columnSpacing,
                    showCheckboxColumn: widget.showCheckboxColumn,
                    showBottomBorder: true,
                    rows: loading
                        ? loadingRows(
                            widget.rowsPerPage,
                          )
                        : _getRows(_firstRowIndex, widget.rowsPerPage),
                  ),
                ),
              ),
              if (!loading)
                Align(
                  alignment: widget.defaultFootAlignment,
                  child: createTableFooter(),
                ),
            ],
          ),
        ),
      ),
      if (loading) const CircularProgressIndicator()
    ],
  );
}