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flex_grid
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The FlexGrid control provides a powerful and quickly way to display data in a tabular format. It is including that frozened column/row,loading more, high performance and better experience in TabBarView/PageView.
| parameter |
description |
default |
| frozenedColumnsCount |
The count of forzened columns |
0 |
| frozenedRowsCount |
The count of forzened rows |
0 |
| cellBuilder |
The builder to create cell |
required |
| cellBuilder |
The builder to create header |
required |
| columnsCount |
The count of columns, it should big than 0 |
required |
| source |
The data source of [FlexGrid] |
required |
| rowWrapper |
decorate row widget in this call back |
null |
| rebuildCustomScrollView |
rebuild when source is changed, It's from [LoadingMoreCustomScrollView] |
false |
| controller |
The [ScrollController] on vertical direction |
null |
| horizontalController |
The [SyncControllerMixin] for horizontal direction |
null |
| outerHorizontalSyncController |
The Outer [SyncControllerMixin], for example [ExtendedTabBarView] or [ExtendedPageView]. It make better experience when scroll on horizontal direction |
null |
| physics |
The physics on both horizontal and vertical direction |
null |
| verticalHighPerformance/horizontalHighPerformance |
If true, forces the children to have the given extent(Cell height/width) in the scroll direction. |
false |
| headerStyle |
An immutable style describing how to create header |
CellStyle.header() |
| cellStyle |
An immutable style describing how to create cell |
CellStyle.cell() |
| indicatorBuilder |
Widget builder for different loading state, it's from [LoadingMoreCustomScrollView] |
null |
| extendedListDelegate |
A delegate that provides extensions, it's from [LoadingMoreCustomScrollView] |
null |
| headersBuilder |
The builder to custom the headers of [FlexGrid] |
null |
| link |
if link is true, scroll parent [ExtendedTabView] when [FlexGrid] is over scroll |
false |
source
[FlexGrid.source] is form loading_more_list, LoadingMoreBase is data collection for loading more. override loadData method to load your data. set hasMore to false when it has no more data.
class FlexGridSource extends LoadingMoreBase<GridRow> {
int _pageIndex = 1;
void _load() {
for (int i = 0; i < 15; i++) {
add(GridRow(name: 'index:$_pageIndex-$i'));
}
}
@override
bool get hasMore => _pageIndex < 4;
@override
Future<bool> loadData([bool isloadMoreAction = false]) async {
await Future<void>.delayed(const Duration(seconds: 2));
_load();
_pageIndex++;
return true;
}
@override
Future<bool> refresh([bool notifyStateChanged = false]) async {
_pageIndex = 1;
return super.refresh(notifyStateChanged);
}
}
rowWrapper
decorate row widget in this call back.
FlexGrid(
rowWrapper: (
BuildContext context,
T data,
int row,
Widget child,
) {
return Column(
children: <Widget>[
child,
const Divider(),
],
);
},
);
headersBuilder
you can add anyother headers in this call back.
FlexGrid(
headersBuilder: (BuildContext b, Widget header) {
return <Widget>[
header,
SliverToBoxAdapter(
child: PullToRefreshContainer(
(PullToRefreshScrollNotificationInfo info) {
return PullToRefreshHeader(
info,
source.lastRefreshTime,
);
}),
),
];
},
);
