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: [
      if (loading)
        const Padding(
          padding: EdgeInsets.all(20),
          child: Center(child: CircularProgressIndicator()),
        )
      else
        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.titleMedium!.copyWith(
                              color: themeData.colorScheme.secondary,
                            )
                          : themeData.textTheme.titleLarge!
                              .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(),
                      dataRowMinHeight: widget.dataRowHeight,
                      dataRowMaxHeight: widget.dataRowHeight,
                      headingRowHeight: widget.headingRowHeight,
                      horizontalMargin: widget.horizontalMargin,
                      columnSpacing: widget.columnSpacing,
                      showCheckboxColumn: widget.showCheckboxColumn,
                      showBottomBorder: true,
                      rows: _getRows(_firstRowIndex, widget.rowsPerPage),
                    ),
                  ),
                ),
                if (!loading)
                  Align(
                    alignment: widget.defaultFootAlignment,
                    child: createTableFooter(),
                  ),
              ],
            ),
          ),
        ),
    ],
  );
}