Fix #7

Author: jzoom

.idea/workspace.xml

@@ -1,3 +1,7 @@
+## [0.1.5] - [2019.03.10]
+
+    * Fix findRenderObject is null
+
 ## [0.1.4] - [2018.10.19]
     * Fix display items when itemCount changes
 

CHANGELOG.md

@@ -1,5 +1,6 @@
 import 'package:example/buildin_transformers.dart';
 import 'package:example/images.dart';
+import 'package:example/screens/ProductListView.dart';
 import 'package:example/welcome.dart';
 import 'package:example/zero.dart';
 import 'package:flutter/material.dart';
@@ -90,6 +91,16 @@ class _MyHomePageState extends State<MyHomePage> {
     return new Scaffold(
       appBar: new AppBar(
         title: new Text(widget.title),
+        actions: <Widget>[
+          new InkWell(
+            child: new Text("route"),
+            onTap: () {
+              Navigator.push(context, new MaterialPageRoute(builder: (c) {
+                return new ProductListView();
+              }));
+            },
+          )
+        ],
       ),
       body: new Column(
         children: <Widget>[

example/lib/main.dart

@@ -0,0 +1,17 @@
+import 'package:example/buildin_transformers.dart';
+import 'package:flutter/material.dart';
+
+import 'package:transformer_page_view/transformer_page_view.dart';
+
+class ProductDetailView extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    // TODO: implement build
+    return new Scaffold(
+      appBar: new AppBar(),
+      body: new Center(
+        child: new Text("Detail"),
+      ),
+    );
+  }
+}

example/lib/screens/ProductDetailView.dart

@@ -0,0 +1,55 @@
+import 'package:example/screens/ProductDetailView.dart';
+import 'package:flutter/material.dart';
+
+import 'package:transformer_page_view/transformer_page_view.dart';
+
+class ProductListView extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() {
+    return new ProductListViewState();
+  }
+}
+
+class ProductListViewState extends State<ProductListView> {
+  @override
+  Widget build(BuildContext context) {
+    return new Scaffold(
+      appBar: new AppBar(
+        title: new Text("ProductList"),
+      ),
+      body: new ListView(
+        children: <Widget>[
+//          new SizedBox(
+//            height: 1000.0,
+//            child: new Container(
+//              color: Colors.greenAccent,
+//            ),
+//          ),
+          new SizedBox(
+            child: new TransformerPageView(
+              viewportFraction: 0.8,
+              itemCount: 10,
+              transformer: new PageTransformerBuilder(builder: (w, i) {
+                return w;
+              }),
+              itemBuilder: (c, i) {
+                return new InkWell(
+                  onTap: () {
+                    Navigator.push(context, new MaterialPageRoute(builder: (c) {
+                      return new ProductDetailView();
+                    }));
+                  },
+                  child: new Container(
+                    child: new Text("$i"),
+                    color: Colors.black26,
+                  ),
+                );
+              },
+            ),
+            height: 100.0,
+          )
+        ],
+      ),
+    );
+  }
+}

example/lib/screens/ProductListView.dart

@@ -127,7 +127,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.1.4"
+    version: "0.1.5"
   typed_data:
     dependency: transitive
     description:

example/pubspec.lock

@@ -3,10 +3,6 @@ import 'dart:async';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
-abstract class ChangeNotifierMixin {
-
-}
-
 class IndexController extends ChangeNotifier {
   static const int NEXT = 1;
   static const int PREVIOUS = -1;

lib/index_controller.dart

@@ -337,8 +337,7 @@ class TransformerPageView extends StatefulWidget {
   }
 }
 
-class _TransformerPageViewState extends State<TransformerPageView>
-    with ChangeNotifierMixin {
+class _TransformerPageViewState extends State<TransformerPageView> {
   Size _size;
   int _activeIndex;
   double _currentPixels;
@@ -357,8 +356,6 @@ class _TransformerPageViewState extends State<TransformerPageView>
     return child;
   }
 
-
-
   Widget _buildItem(BuildContext context, int index) {
     return new AnimatedBuilder(
         animation: _pageController,
@@ -454,8 +451,18 @@ class _TransformerPageViewState extends State<TransformerPageView>
   }
 
   void _onGetSize(_) {
+    Size size;
+    if (context == null) {
+      onGetSize(size);
+      return;
+    }
     RenderObject renderObject = context.findRenderObject();
-    Size size = renderObject?.paintBounds?.size;
+    if (renderObject != null) {
+      Rect bounds = renderObject.paintBounds;
+      if (bounds != null) {
+        size = bounds.size;
+      }
+    }
     _calcCurrentPixels();
     onGetSize(size);
   }
@@ -540,7 +547,6 @@ class _TransformerPageViewState extends State<TransformerPageView>
     super.didChangeDependencies();
   }
 
-  @override
   ChangeNotifier getNotifier() {
     return widget.controller;
   }
@@ -572,7 +578,6 @@ class _TransformerPageViewState extends State<TransformerPageView>
     return currentIndex;
   }
 
-  @override
   void onChangeNotifier() {
     int event = widget.controller.event;
     int index;
@@ -604,18 +609,12 @@ class _TransformerPageViewState extends State<TransformerPageView>
     }
   }
 
-
   ChangeNotifier _controller;
 
-
-
   void dispose() {
     super.dispose();
     if (_controller != null) {
       _controller.removeListener(onChangeNotifier);
     }
   }
-
-
-
 }

lib/transformer_page_view.dart

@@ -1,6 +1,6 @@
 name: transformer_page_view
 description: PageTransformer for flutter
-version: 0.1.4
+version: 0.1.5
 author: JZoom <[email protected]>
 homepage:  https://github.com/jzoom/transformer_page_view
 

pubspec.yaml

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_driver/flutter_driver.dart' as driver;
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:transformer_page_view/transformer_page_view.dart';

test/transformer_page_view_test.dart

@@ -12,6 +12,7 @@
       <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/flutter_assets/packages" />
     </content>
     <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />