Revert "InteractiveViewer.builder (#77414)" (#78867)

This reverts commit 2c2c8a75.

packages/flutter/test/widgets/interactive_viewer_test.dart

@@ -1026,89 +1026,6 @@ void main() {
         findsOneWidget,
       );
     });
-
-    testWidgets('builder can change widgets that are off-screen', (WidgetTester tester) async {
-      final TransformationController transformationController = TransformationController();
-      const double childHeight = 10.0;
-      await tester.pumpWidget(
-        MaterialApp(
-          home: Scaffold(
-            body: Center(
-              child: SizedBox(
-                height: 50.0,
-                child: InteractiveViewer.builder(
-                  transformationController: transformationController,
-                  scaleEnabled: false,
-                  boundaryMargin: const EdgeInsets.all(double.infinity),
-                  // Build visible children green, off-screen children red.
-                  builder: (BuildContext context, Quad viewportQuad) {
-                    final Rect viewport = _axisAlignedBoundingBox(viewportQuad);
-                    final List<Container> children = <Container>[];
-                    for (int i = 0; i < 10; i++) {
-                      final double childTop = i * childHeight;
-                      final double childBottom = childTop + childHeight;
-                      final bool visible = (childBottom >= viewport.top && childBottom <= viewport.bottom)
-                          || (childTop >= viewport.top && childTop <= viewport.bottom);
-                      children.add(Container(
-                        height: childHeight,
-                        color: visible ? Colors.green : Colors.red,
-                      ));
-                    }
-                    return Column(
-                      children: children,
-                    );
-                  },
-                ),
-              ),
-            ),
-          ),
-        ),
-      );
-
-      expect(transformationController.value, equals(Matrix4.identity()));
-
-      // The first six are partially visible and therefore green.
-      int i = 0;
-      for (final Element element in find.byType(Container, skipOffstage: false).evaluate()) {
-        final Container container = element.widget as Container;
-        if (i < 6) {
-          expect(container.color, Colors.green);
-        } else {
-          expect(container.color, Colors.red);
-        }
-        i++;
-      }
-
-      // Drag to pan down past the first child.
-      final Offset childOffset = tester.getTopLeft(find.byType(SizedBox));
-      const double translationY = 15.0;
-      final Offset childInterior = Offset(
-        childOffset.dx,
-        childOffset.dy + translationY,
-      );
-      final TestGesture gesture = await tester.startGesture(childInterior);
-      addTearDown(gesture.removePointer);
-      await tester.pump();
-      await gesture.moveTo(childOffset);
-      await tester.pump();
-      await gesture.up();
-      await tester.pumpAndSettle();
-      expect(transformationController.value, isNot(Matrix4.identity()));
-      expect(transformationController.value.getTranslation().y, -translationY);
-
-      // After scrolling down a bit, the first child is not visible, the next
-      // six are, and the final three are not.
-      i = 0;
-      for (final Element element in find.byType(Container, skipOffstage: false).evaluate()) {
-        final Container container = element.widget as Container;
-        if (i > 0 && i < 7) {
-          expect(container.color, Colors.green);
-        } else {
-          expect(container.color, Colors.red);
-        }
-        i++;
-      }
-    });
   });
 
   group('getNearestPointOnLine', () {
@@ -1318,27 +1235,3 @@ void main() {
     });
   });
 }
-
-// Returns the axis aligned bounding box for the given Quad, which might not
-// be axis aligned.
-Rect _axisAlignedBoundingBox(Quad quad) {
-  double? xMin;
-  double? xMax;
-  double? yMin;
-  double? yMax;
-  for (final Vector3 point in <Vector3>[quad.point0, quad.point1, quad.point2, quad.point3]) {
-    if (xMin == null || point.x < xMin) {
-      xMin = point.x;
-    }
-    if (xMax == null || point.x > xMax) {
-      xMax = point.x;
-    }
-    if (yMin == null || point.y < yMin) {
-      yMin = point.y;
-    }
-    if (yMax == null || point.y > yMax) {
-      yMax = point.y;
-    }
-  }
-  return Rect.fromLTRB(xMin!, yMin!, xMax!, yMax!);
-}