infinite_lazy_grid
Code Issues

add centering and focus capabilities

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This commit is contained in:
ruinivist
2025-07-06 03:53:18 +00:00
parent b18ef006af
commit 10bb69a15f
8 changed files with 224 additions and 46 deletions
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test/canvas_view_test.dart
+7 -6
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@@ -15,9 +15,9 @@ class TestChild extends StatelessWidget {
void main() {
testWidgets('CanvasView renders only visible children and reduces count on zoom out', (WidgetTester tester) async {
final controller = CanvasController(debug: true, initialScale: 1);
final controller = CanvasController(debug: true);
for (int i = 0; i < 10000; i++) {
controller.addChild(Offset((i % 80) * 100.0, (i ~/ 80) * 100.0), () => TestChild(index: i));
controller.addChild(Offset((i % 80) * 100.0, (i ~/ 80) * 100.0), (_) => TestChild(index: i));
}
await tester.pumpWidget(
MaterialApp(
@@ -46,9 +46,9 @@ void main() {
});
testWidgets('CanvasView scales as expected', (WidgetTester tester) async {
final controller = CanvasController(debug: true, initialScale: 1);
controller.addChild(const Offset(0, 0), () => TestChild(index: 0));
controller.addChild(const Offset(100, 100), () => TestChild(index: 1));
final controller = CanvasController(debug: true);
controller.addChild(const Offset(0, 0), (_) => TestChild(index: 0));
controller.addChild(const Offset(100, 100), (_) => TestChild(index: 1));
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
@@ -57,6 +57,7 @@ void main() {
),
);
await tester.pumpAndSettle();
final context = tester.element(find.byType(CanvasView));
// Initial size check
final finder = find.byType(TestChild);
@@ -67,7 +68,7 @@ void main() {
controller.onScaleUpdate(ScaleUpdateDetails(focalPoint: const Offset(0, 0), scale: 2.0));
await tester.pumpAndSettle();
expect(controller.scale, 2.0);
final ssPositions = controller.widgetsWithScreenPositions().map((e) => e.ssPosition).toList();
final ssPositions = controller.widgetsWithScreenPositions(context).map((e) => e.ssPosition).toList();
expect(ssPositions, [Offset.zero, const Offset(200, 200)]);
});
}