adding packages

2026-01-15 14:38:46 -08:00
parent ef86e3ab6a
commit 6869cf47e5
5253 changed files with 726695 additions and 34 deletions
@@ -0,0 +1,58 @@
+import 'package:flutter/material.dart';
+
+class DataSource<T> extends DataTableSource {
+  DataSource(this._items);
+  final List<T> _items;
+
+  @override
+  int get selectedRowCount => selected.length;
+  final Set<int> selected = {};
+
+  String _search = '';
+  String get search => this._search;
+  void onSearch(String val) {
+    _search = val;
+    this.notifyListeners();
+  }
+
+  @override
+  DataRow getRow(int index) {
+    final item = items[index];
+    List<DataCell> cells = <DataCell>[];
+    if (item is Map) {
+      cells = item.values.map((e) => DataCell(Text(e.toString()))).toList();
+    } else {
+      cells = [DataCell(Text(item.toString()))];
+    }
+    return DataRow(
+      selected: selected.contains(index),
+      cells: cells,
+      onSelectChanged: (val) {
+        if (val) {
+          selected.add(index);
+        } else {
+          selected.remove(index);
+        }
+        this.notifyListeners();
+      },
+    );
+  }
+
+  void clearSelection([int skipIndex]) {
+    final _past = [...selected];
+    for (final idx in _past) {
+      if (idx == skipIndex) continue;
+      this.getRow(idx).onSelectChanged(false);
+      this.selected.remove(idx);
+    }
+    this.notifyListeners();
+  }
+
+  @override
+  bool get isRowCountApproximate => false;
+
+  @override
+  int get rowCount => items.length;
+
+  List<T> get items => this._items ?? [];
+}