// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // @dart = 2.8 import 'dart:math' as math; import 'dart:ui' as ui; import 'package:flutter_test/flutter_test.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter/widgets.dart'; import 'package:vector_math/vector_math_64.dart'; void main() { testWidgets('Transform origin', (WidgetTester tester) async { bool didReceiveTap = false; await tester.pumpWidget( Directionality( textDirection: TextDirection.ltr, child: Stack( children: <Widget>[ Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, color: const Color(0xFF0000FF), ), ), Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, child: Transform( transform: Matrix4.diagonal3Values(0.5, 0.5, 1.0), origin: const Offset(100.0, 50.0), child: GestureDetector( onTap: () { didReceiveTap = true; }, child: Container( color: const Color(0xFF00FFFF), ), ), ), ), ), ], ), ), ); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(110.0, 110.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isTrue); }); testWidgets('Transform alignment', (WidgetTester tester) async { bool didReceiveTap = false; await tester.pumpWidget( Directionality( textDirection: TextDirection.ltr, child: Stack( children: <Widget>[ Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, color: const Color(0xFF0000FF), ), ), Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, child: Transform( transform: Matrix4.diagonal3Values(0.5, 0.5, 1.0), alignment: const Alignment(1.0, 0.0), child: GestureDetector( onTap: () { didReceiveTap = true; }, child: Container( color: const Color(0xFF00FFFF), ), ), ), ), ), ], ), ), ); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(110.0, 110.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isTrue); }); testWidgets('Transform AlignmentDirectional alignment', (WidgetTester tester) async { bool didReceiveTap = false; Widget buildFrame(TextDirection textDirection, AlignmentGeometry alignment) { return Directionality( textDirection: textDirection, child: Stack( children: <Widget>[ Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, color: const Color(0xFF0000FF), ), ), Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, child: Transform( transform: Matrix4.diagonal3Values(0.5, 0.5, 1.0), alignment: alignment, child: GestureDetector( onTap: () { didReceiveTap = true; }, child: Container( color: const Color(0xFF00FFFF), ), ), ), ), ), ], ), ); } await tester.pumpWidget(buildFrame(TextDirection.ltr, AlignmentDirectional.centerEnd)); didReceiveTap = false; await tester.tapAt(const Offset(110.0, 110.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isTrue); await tester.pumpWidget(buildFrame(TextDirection.rtl, AlignmentDirectional.centerStart)); didReceiveTap = false; await tester.tapAt(const Offset(110.0, 110.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isTrue); await tester.pumpWidget(buildFrame(TextDirection.ltr, AlignmentDirectional.centerStart)); didReceiveTap = false; await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(110.0, 150.0)); expect(didReceiveTap, isTrue); await tester.pumpWidget(buildFrame(TextDirection.rtl, AlignmentDirectional.centerEnd)); didReceiveTap = false; await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(110.0, 150.0)); expect(didReceiveTap, isTrue); }); testWidgets('Transform offset + alignment', (WidgetTester tester) async { bool didReceiveTap = false; await tester.pumpWidget( Directionality( textDirection: TextDirection.ltr, child: Stack( children: <Widget>[ Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, color: const Color(0xFF0000FF), ), ), Positioned( top: 100.0, left: 100.0, child: Container( width: 100.0, height: 100.0, child: Transform( transform: Matrix4.diagonal3Values(0.5, 0.5, 1.0), origin: const Offset(100.0, 0.0), alignment: const Alignment(-1.0, 0.0), child: GestureDetector( onTap: () { didReceiveTap = true; }, child: Container( color: const Color(0xFF00FFFF), ), ), ), ), ), ], ), ), ); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(110.0, 110.0)); expect(didReceiveTap, isFalse); await tester.tapAt(const Offset(190.0, 150.0)); expect(didReceiveTap, isTrue); }); testWidgets('Composited transform offset', (WidgetTester tester) async { await tester.pumpWidget( Center( child: SizedBox( width: 400.0, height: 300.0, child: ClipRect( child: Transform( transform: Matrix4.diagonal3Values(0.5, 0.5, 1.0), child: Opacity( opacity: 0.9, child: Container( color: const Color(0xFF00FF00), ), ), ), ), ), ), ); final List<Layer> layers = tester.layers ..retainWhere((Layer layer) => layer is TransformLayer); expect(layers.length, 2); // The first transform is from the render view. final TransformLayer layer = layers[1] as TransformLayer; final Matrix4 transform = layer.transform; expect(transform.getTranslation(), equals(Vector3(100.0, 75.0, 0.0))); }); testWidgets('Transform.rotate', (WidgetTester tester) async { await tester.pumpWidget( Transform.rotate( angle: math.pi / 2.0, child: Opacity(opacity: 0.5, child: Container()), ), ); final List<Layer> layers = tester.layers ..retainWhere((Layer layer) => layer is TransformLayer); expect(layers.length, 2); // The first transform is from the render view. final TransformLayer layer = layers[1] as TransformLayer; final Matrix4 transform = layer.transform; expect(transform.storage, <dynamic>[ moreOrLessEquals(0.0), 1.0, 0.0, 0.0, -1.0, moreOrLessEquals(0.0), 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 700.0, -100.0, 0.0, 1.0, ]); }); testWidgets('applyPaintTransform of Transform in Padding', (WidgetTester tester) async { await tester.pumpWidget( Padding( padding: const EdgeInsets.only( left: 30.0, top: 20.0, right: 50.0, bottom: 70.0, ), child: Transform( transform: Matrix4.diagonal3Values(2.0, 2.0, 2.0), child: const Placeholder(), ), ), ); expect(tester.getTopLeft(find.byType(Placeholder)), const Offset(30.0, 20.0)); }); testWidgets('Transform.translate', (WidgetTester tester) async { await tester.pumpWidget( Transform.translate( offset: const Offset(100.0, 50.0), child: Opacity(opacity: 0.5, child: Container()), ), ); // This should not cause a transform layer to be inserted. final List<Layer> layers = tester.layers ..retainWhere((Layer layer) => layer is TransformLayer); expect(layers.length, 1); // only the render view expect(tester.getTopLeft(find.byType(Container)), const Offset(100.0, 50.0)); }); testWidgets('Transform.scale', (WidgetTester tester) async { await tester.pumpWidget( Transform.scale( scale: 2.0, child: Opacity(opacity: 0.5, child: Container()), ), ); final List<Layer> layers = tester.layers ..retainWhere((Layer layer) => layer is TransformLayer); expect(layers.length, 2); // The first transform is from the render view. final TransformLayer layer = layers[1] as TransformLayer; final Matrix4 transform = layer.transform; expect(transform.storage, <dynamic>[ // These are column-major, not row-major. 2.0, 0.0, 0.0, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, -400.0, -300.0, 0.0, 1.0, // it's 1600x1200, centered in an 800x600 square ]); }); testWidgets('Translated child into translated box - hit test', (WidgetTester tester) async { final GlobalKey key1 = GlobalKey(); bool _pointerDown = false; await tester.pumpWidget( Transform.translate( offset: const Offset(100.0, 50.0), child: Transform.translate( offset: const Offset(1000.0, 1000.0), child: Listener( onPointerDown: (PointerDownEvent event) { _pointerDown = true; }, child: Container( key: key1, color: const Color(0xFF000000), ), ), ), ), ); expect(_pointerDown, isFalse); await tester.tap(find.byKey(key1)); expect(_pointerDown, isTrue); }); Widget _generateTransform(bool needsCompositing, double angle) { final Widget customPaint = CustomPaint(painter: TestRectPainter()); return Transform( transform: MatrixUtils.createCylindricalProjectionTransform( radius: 100, angle: angle, perspective: 0.003, ), // A RepaintBoundary child forces the Transform to needsCompositing child: needsCompositing ? RepaintBoundary(child: customPaint) : customPaint, ); } testWidgets( '3D transform renders the same with or without needsCompositing', (WidgetTester tester) async { for (double angle = 0; angle <= math.pi/4; angle += 0.01) { await tester.pumpWidget(RepaintBoundary(child: _generateTransform(true, angle))); final RenderBox renderBox = tester.binding.renderView.child; final OffsetLayer layer = renderBox.debugLayer as OffsetLayer; final ui.Image imageWithCompositing = await layer.toImage(renderBox.paintBounds); await tester.pumpWidget(RepaintBoundary(child: _generateTransform(false, angle))); await expectLater(find.byType(RepaintBoundary).first, matchesReferenceImage(imageWithCompositing)); } }, skip: isBrowser, // due to https://github.com/flutter/flutter/issues/42767 ); } class TestRectPainter extends CustomPainter { @override void paint(ui.Canvas canvas, ui.Size size) { canvas.drawRect( const Offset(200, 200) & const Size(10, 10), Paint()..color = const Color(0xFFFF0000), ); } @override bool shouldRepaint(CustomPainter oldDelegate) => true; }