[story_shell_labs] edit mode ui updates

MI4-2429 #done

Change-Id: I0d2e2b8c5ba5313a44d4e8d3a0795431fb275149
diff --git a/public/dart/story_shell_labs/lib/src/layout/tile_presenter/tile_presenter_widget.dart b/public/dart/story_shell_labs/lib/src/layout/tile_presenter/tile_presenter_widget.dart
index a0ec2f7..9200551 100644
--- a/public/dart/story_shell_labs/lib/src/layout/tile_presenter/tile_presenter_widget.dart
+++ b/public/dart/story_shell_labs/lib/src/layout/tile_presenter/tile_presenter_widget.dart
@@ -14,13 +14,9 @@
 import 'widgets/drop_target_widget.dart';
 import 'widgets/editing_tile_chrome.dart';
 
-const _kSizerThickness = 24.0;
-const _kSizerHandleThickness = 4.0;
-
-final _kSizerHandleDecoration = BoxDecoration(
-  border: Border.all(color: Color(0xFFBDBDBD)),
-  borderRadius: BorderRadius.circular(2),
-);
+const _kSizerThickness = 48.0;
+const _kSizerHandleThickness = 8.0;
+const _kSizerHandleLength = 32.0;
 
 /// Tiling layout Layout presenter widget.
 @immutable
@@ -112,12 +108,12 @@
               child: Center(
                 child: Container(
                   width: axis == Axis.horizontal
-                      ? _kSizerThickness
+                      ? _kSizerHandleLength
                       : _kSizerHandleThickness,
                   height: axis == Axis.vertical
-                      ? _kSizerThickness
+                      ? _kSizerHandleLength
                       : _kSizerHandleThickness,
-                  decoration: _kSizerHandleDecoration,
+                  decoration: const BoxDecoration(color: Colors.black),
                 ),
               ),
             ),
diff --git a/public/dart/story_shell_labs/lib/src/layout/tile_presenter/widgets/editing_tile_chrome.dart b/public/dart/story_shell_labs/lib/src/layout/tile_presenter/widgets/editing_tile_chrome.dart
index 698256a..c149864 100644
--- a/public/dart/story_shell_labs/lib/src/layout/tile_presenter/widgets/editing_tile_chrome.dart
+++ b/public/dart/story_shell_labs/lib/src/layout/tile_presenter/widgets/editing_tile_chrome.dart
@@ -6,7 +6,7 @@
 import 'package:tiler/tiler.dart';
 import 'drop_target_widget.dart';
 
-const _kBorderWidth = 1.0;
+const _kBorderWidth = 2.0;
 
 /// Chrome for a tiling layout presenter.
 class EditingTileChrome extends StatefulWidget {
diff --git a/shell/story_shell_labs/lib/main.dart b/shell/story_shell_labs/lib/main.dart
index ca7f320..1cb1391 100644
--- a/shell/story_shell_labs/lib/main.dart
+++ b/shell/story_shell_labs/lib/main.dart
@@ -27,9 +27,13 @@
 
   runApp(
     MaterialApp(
-      home: Directionality(
-        textDirection: TextDirection.ltr,
-        child: StoryWidget(presenter: _layoutManager.presenter),
+      theme: ThemeData(fontFamily: 'RobotoMono'),
+      home: Scaffold(
+        backgroundColor: Colors.white,
+        body: Directionality(
+          textDirection: TextDirection.ltr,
+          child: StoryWidget(presenter: _layoutManager.presenter),
+        ),
       ),
     ),
   );
diff --git a/shell/story_shell_labs/lib/src/widgets/story_widget.dart b/shell/story_shell_labs/lib/src/widgets/story_widget.dart
index 658fb90..3938927 100644
--- a/shell/story_shell_labs/lib/src/widgets/story_widget.dart
+++ b/shell/story_shell_labs/lib/src/widgets/story_widget.dart
@@ -93,39 +93,32 @@
 
   @override
   Widget build(BuildContext context) {
-    return Offstage(
-      offstage: _tilerModel.root.isEmpty,
-      child: PhysicalModel(
-        color: Colors.white,
-        child: Stack(
-          children: <Widget>[
-            Positioned(
-              top: 0,
-              left: 0,
-              right: 0,
-              child: _buildStoryTitleBar(),
-            ),
-            Positioned(
-              top: 24,
-              left: 4,
-              bottom: 4,
-              right: 4,
-              child: LayoutPresenter(
-                tilerModel: _tilerModel,
-                connections: _connections,
-                isEditing: _isEditing,
-                focusedMod: _focusedMod,
-                parametersToColors: _parametersToColors,
-                setTilerModel: (model) {
-                  setState(() {
-                    _tilerModel = cloneTiler(model);
-                  });
-                },
-              ),
-            ),
-          ],
+    return Stack(
+      children: <Widget>[
+        Positioned(
+          top: 0,
+          left: 0,
+          right: 0,
+          child: _buildStoryTitleBar(),
         ),
-      ),
+        Positioned.fill(
+          child: Padding(
+            padding: _isEditing ? EdgeInsets.zero : const EdgeInsets.all(24.0),
+            child: LayoutPresenter(
+              tilerModel: _tilerModel,
+              connections: _connections,
+              isEditing: _isEditing,
+              focusedMod: _focusedMod,
+              parametersToColors: _parametersToColors,
+              setTilerModel: (model) {
+                setState(() {
+                  _tilerModel = cloneTiler(model);
+                });
+              },
+            ),
+          ),
+        ),
+      ],
     );
   }
 
@@ -156,12 +149,11 @@
           return Positioned(
             left: 0,
             right: 0,
-            height: 84,
-            bottom: 20,
+            bottom: 8,
             child: Align(
               alignment: Alignment.bottomCenter,
               child: SizedBox(
-                height: 84,
+                height: 32,
                 child: Row(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: <Widget>[
@@ -197,7 +189,8 @@
     }
   }
 
-  Widget _buildTitleBarTextButton(String title, VoidCallback onTap) => InkWell(
+  Widget _buildTitleBarTextButton(String title, VoidCallback onTap) =>
+      GestureDetector(
         onTap: onTap,
         child: Padding(
           padding: const EdgeInsets.symmetric(horizontal: 16),
@@ -205,7 +198,6 @@
             child: Text(
               title,
               style: const TextStyle(
-                fontFamily: 'RobotoMono',
                 fontSize: 12,
               ),
             ),
@@ -214,38 +206,39 @@
       );
 
   Widget _buildStoryTitleBar() {
-    return Material(
-      color: Colors.white,
-      child: _isEditing
-          ? SizedBox(
-              height: 36,
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                crossAxisAlignment: CrossAxisAlignment.stretch,
-                mainAxisSize: MainAxisSize.max,
-                children: <Widget>[
-                  _buildTitleBarTextButton('Cancel', _cancelEditing),
-                  _buildTitleBarTextButton('Done', _endEditing),
-                ],
-              ),
-            )
-          : Center(
-              child: SizedBox(
-                height: 24,
-                width: 40,
-                child: InkWell(
-                  onTap: _startEditing,
+    return _isEditing
+        ? SizedBox(
+            height: 36,
+            child: Row(
+              mainAxisSize: MainAxisSize.max,
+              children: <Widget>[
+                _buildTitleBarTextButton('Cancel', _cancelEditing),
+                Spacer(),
+                _buildTitleBarTextButton('Done', _endEditing),
+              ],
+            ),
+          )
+        : Center(
+            child: SizedBox(
+              height: 24,
+              child: GestureDetector(
+                onTap: _startEditing,
+                child: Container(
+                  color: Colors.transparent,
+                  width: 32.0,
                   child: Center(
-                    child: SizedBox(
-                      width: 12,
-                      height: 11,
+                    child: Container(
+                      width: 18,
+                      height: 12,
+                      color: Colors.black,
+                      padding: EdgeInsets.all(1.0),
                       child: Tiler(
                         sizerThickness: 0,
                         model: cloneTiler(_tilerModel),
                         chromeBuilder: (BuildContext context, TileModel tile) =>
                             Padding(
-                              padding: EdgeInsets.all(0.5),
-                              child: Container(color: Colors.black),
+                              padding: EdgeInsets.all(1.0),
+                              child: Container(color: Colors.white),
                             ),
                       ),
                     ),
@@ -253,6 +246,6 @@
                 ),
               ),
             ),
-    );
+          );
   }
 }