updateRenderObject() methods should use the .. pattern

Fixes #1381

packages/flutter/lib/src/material/checkbox.dart

@@ -75,10 +75,11 @@ class _CheckboxRenderObjectWidget extends LeafRenderObjectWidget {
   );
 
   void updateRenderObject(_RenderCheckbox renderObject, _CheckboxRenderObjectWidget oldWidget) {
-    renderObject.value = value;
+    renderObject
-    renderObject.activeColor = activeColor;
+      ..value = value
-    renderObject.inactiveColor = inactiveColor;
+      ..activeColor = activeColor
-    renderObject.onChanged = onChanged;
+      ..inactiveColor = inactiveColor
+      ..onChanged = onChanged;
   }
 }
 

packages/flutter/lib/src/material/radio.dart

@@ -80,10 +80,11 @@ class _RadioRenderObjectWidget extends LeafRenderObjectWidget {
   );
 
   void updateRenderObject(_RenderRadio renderObject, _RadioRenderObjectWidget oldWidget) {
-    renderObject.value = selected;
+    renderObject
-    renderObject.activeColor = activeColor;
+      ..value = selected
-    renderObject.inactiveColor = inactiveColor;
+      ..activeColor = activeColor
-    renderObject.onChanged = onChanged;
+      ..inactiveColor = inactiveColor
+      ..onChanged = onChanged;
   }
 }
 

packages/flutter/lib/src/material/slider.dart

@@ -62,9 +62,10 @@ class _SliderRenderObjectWidget extends LeafRenderObjectWidget {
   );
 
   void updateRenderObject(_RenderSlider renderObject, _SliderRenderObjectWidget oldWidget) {
-    renderObject.value = value;
+    renderObject
-    renderObject.activeColor = activeColor;
+      ..value = value
-    renderObject.onChanged = onChanged;
+      ..activeColor = activeColor
+      ..onChanged = onChanged;
   }
 }
 

packages/flutter/lib/src/material/switch.dart

@@ -78,12 +78,13 @@ class _SwitchRenderObjectWidget extends LeafRenderObjectWidget {
   );
 
   void updateRenderObject(_RenderSwitch renderObject, _SwitchRenderObjectWidget oldWidget) {
-    renderObject.value = value;
+    renderObject
-    renderObject.activeColor = activeColor;
+      ..value = value
-    renderObject.inactiveColor = inactiveColor;
+      ..activeColor = activeColor
-    renderObject.activeTrackColor = activeTrackColor;
+      ..inactiveColor = inactiveColor
-    renderObject.inactiveTrackColor = inactiveTrackColor;
+      ..activeTrackColor = activeTrackColor
-    renderObject.onChanged = onChanged;
+      ..inactiveTrackColor = inactiveTrackColor
+      ..onChanged = onChanged;
   }
 }
 

packages/flutter/lib/src/material/tabs.dart

@@ -270,12 +270,13 @@ class _TabBarWrapper extends MultiChildRenderObjectWidget {
   }
 
   void updateRenderObject(_RenderTabBar renderObject, _TabBarWrapper oldWidget) {
-    renderObject.selectedIndex = selectedIndex;
+    renderObject
-    renderObject.indicatorColor = indicatorColor;
+      ..selectedIndex = selectedIndex
-    renderObject.indicatorRect = indicatorRect;
+      ..indicatorColor = indicatorColor
-    renderObject.textAndIcons = textAndIcons;
+      ..indicatorRect = indicatorRect
-    renderObject.isScrollable = isScrollable;
+      ..textAndIcons = textAndIcons
-    renderObject.onLayoutChanged = onLayoutChanged;
+      ..isScrollable = isScrollable
+      ..onLayoutChanged = onLayoutChanged;
   }
 }
 

packages/flutter/lib/src/widgets/basic.dart

@@ -102,8 +102,9 @@ class ShaderMask extends OneChildRenderObjectWidget {
   }
 
   void updateRenderObject(RenderShaderMask renderObject, ShaderMask oldWidget) {
-    renderObject.shaderCallback = shaderCallback;
+    renderObject
-    renderObject.transferMode = transferMode;
+      ..shaderCallback = shaderCallback
+      ..transferMode = transferMode;
   }
 }
 
@@ -132,8 +133,9 @@ class DecoratedBox extends OneChildRenderObjectWidget {
   RenderDecoratedBox createRenderObject() => new RenderDecoratedBox(decoration: decoration, position: position);
 
   void updateRenderObject(RenderDecoratedBox renderObject, DecoratedBox oldWidget) {
-    renderObject.decoration = decoration;
+    renderObject
-    renderObject.position = position;
+      ..decoration = decoration
+      ..position = position;
   }
 }
 
@@ -166,13 +168,15 @@ class CustomPaint extends OneChildRenderObjectWidget {
   );
 
   void updateRenderObject(RenderCustomPaint renderObject, CustomPaint oldWidget) {
-    renderObject.painter = painter;
+    renderObject
-    renderObject.foregroundPainter = foregroundPainter;
+      ..painter = painter
+      ..foregroundPainter = foregroundPainter;
   }
 
   void didUnmountRenderObject(RenderCustomPaint renderObject) {
-    renderObject.painter = null;
+    renderObject
-    renderObject.foregroundPainter = null;
+      ..painter = null
+      ..foregroundPainter = null;
   }
 }
 
@@ -220,8 +224,9 @@ class ClipRRect extends OneChildRenderObjectWidget {
   RenderClipRRect createRenderObject() => new RenderClipRRect(xRadius: xRadius, yRadius: yRadius);
 
   void updateRenderObject(RenderClipRRect renderObject, ClipRRect oldWidget) {
-    renderObject.xRadius = xRadius;
+    renderObject
-    renderObject.yRadius = yRadius;
+      ..xRadius = xRadius
+      ..yRadius = yRadius;
   }
 }
 
@@ -283,10 +288,11 @@ class Transform extends OneChildRenderObjectWidget {
   );
 
   void updateRenderObject(RenderTransform renderObject, Transform oldWidget) {
-    renderObject.transform = transform;
+    renderObject
-    renderObject.origin = origin;
+      ..transform = transform
-    renderObject.alignment = alignment;
+      ..origin = origin
-    renderObject.transformHitTests = transformHitTests;
+      ..alignment = alignment
+      ..transformHitTests = transformHitTests;
   }
 }
 
@@ -307,8 +313,9 @@ class FractionalTranslation extends OneChildRenderObjectWidget {
   RenderFractionalTranslation createRenderObject() => new RenderFractionalTranslation(translation: translation, transformHitTests: transformHitTests);
 
   void updateRenderObject(RenderFractionalTranslation renderObject, FractionalTranslation oldWidget) {
-    renderObject.translation = translation;
+    renderObject
-    renderObject.transformHitTests = transformHitTests;
+      ..translation = translation
+      ..transformHitTests = transformHitTests;
   }
 }
 
@@ -381,9 +388,10 @@ class Align extends OneChildRenderObjectWidget {
   RenderPositionedBox createRenderObject() => new RenderPositionedBox(alignment: alignment, widthFactor: widthFactor, heightFactor: heightFactor);
 
   void updateRenderObject(RenderPositionedBox renderObject, Align oldWidget) {
-    renderObject.alignment = alignment;
+    renderObject
-    renderObject.widthFactor = widthFactor;
+      ..alignment = alignment
-    renderObject.heightFactor = heightFactor;
+      ..widthFactor = widthFactor
+      ..heightFactor = heightFactor;
   }
 }
 
@@ -563,8 +571,9 @@ class FractionallySizedBox extends OneChildRenderObjectWidget {
   );
 
   void updateRenderObject(RenderFractionallySizedBox renderObject, FractionallySizedBox oldWidget) {
-    renderObject.widthFactor = width;
+    renderObject
-    renderObject.heightFactor = height;
+      ..widthFactor = width
+      ..heightFactor = height;
   }
 
   void debugFillDescription(List<String> description) {

packages/flutter/lib/src/widgets/gesture_detector.dart

@@ -450,11 +450,12 @@ class _GestureSemantics extends OneChildRenderObjectWidget {
 
   void updateRenderObject(RenderSemanticsGestureHandler renderObject, _GestureSemantics oldWidget) {
     Map<Type, GestureRecognizer> recognizers = owner._recognizers;
-    renderObject.onTap = recognizers.containsKey(TapGestureRecognizer) ? _handleTap : null;
+    renderObject
-    renderObject.onLongPress = recognizers.containsKey(LongPressGestureRecognizer) ? _handleLongPress : null;
+      ..onTap = recognizers.containsKey(TapGestureRecognizer) ? _handleTap : null
-    renderObject.onHorizontalDragUpdate = recognizers.containsKey(VerticalDragGestureRecognizer) ||
+      ..onLongPress = recognizers.containsKey(LongPressGestureRecognizer) ? _handleLongPress : null
-                                          recognizers.containsKey(PanGestureRecognizer) ? _handleHorizontalDragUpdate : null;
+      ..onHorizontalDragUpdate = recognizers.containsKey(VerticalDragGestureRecognizer) ||
-    renderObject.onVerticalDragUpdate = recognizers.containsKey(VerticalDragGestureRecognizer) ||
+          recognizers.containsKey(PanGestureRecognizer) ? _handleHorizontalDragUpdate : null
-                                        recognizers.containsKey(PanGestureRecognizer) ? _handleVerticalDragUpdate : null;
+      ..onVerticalDragUpdate = recognizers.containsKey(VerticalDragGestureRecognizer) ||
+          recognizers.containsKey(PanGestureRecognizer) ? _handleVerticalDragUpdate : null;
   }
 }

packages/flutter/lib/src/widgets/performance_overlay.dart

@@ -62,7 +62,8 @@ class PerformanceOverlay extends LeafRenderObjectWidget {
   );
 
   void updateRenderObject(RenderPerformanceOverlay renderObject, RenderObjectWidget oldWidget) {
-    renderObject.optionsMask = optionsMask;
+    renderObject
-    renderObject.rasterizerThreshold = rasterizerThreshold;
+      ..optionsMask = optionsMask
+      ..rasterizerThreshold = rasterizerThreshold;
   }
 }

packages/flutter_sprites/lib/src/sprite_widget.dart

@@ -27,7 +27,8 @@ class SpriteWidget extends OneChildRenderObjectWidget {
   SpriteBox createRenderObject() => new SpriteBox(rootNode, transformMode);
 
   void updateRenderObject(SpriteBox renderObject, SpriteWidget oldWidget) {
-    renderObject.rootNode = rootNode;
+    renderObject
-    renderObject.transformMode = transformMode;
+      ..rootNode = rootNode
+      ..transformMode = transformMode;
   }
 }