Update paths in sky_home.dart

I also removed the leading /, so it is now possible
to use shelldb start sky/sky_home to test.

Also fixed touch_demo.dart and sector layout to
work and not crash.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1177343002.

examples/rendering/touch_demo.dart

@@ -4,18 +4,22 @@
 
 import 'dart:math';
 import 'dart:sky';
+
 import 'package:sky/framework/app.dart';
 import 'package:sky/framework/rendering/box.dart';
 import 'package:sky/framework/rendering/object.dart';
+import 'package:sky/framework/rendering/paragraph.dart';
+import 'package:sky/framework/rendering/stack.dart';
+import 'package:sky/framework/theme2/colors.dart';
 
 // Material design colors. :p
-List<int> colors = [
-  0xFF009688,
-  0xFFFFC107,
-  0xFF9C27B0,
-  0xFF03A9F4,
-  0xFF673AB7,
-  0xFFCDDC39,
+List<Color> colors = [
+  Teal[500],
+  Amber[500],
+  Purple[500],
+  LightBlue[500],
+  DeepPurple[500],
+  Lime[500],
 ];
 
 class Dot {
@@ -24,7 +28,7 @@ class Dot {
   double y = 0.0;
   double radius = 0.0;
 
-  Dot({int color}) : _paint = new Paint()..color = color;
+  Dot({ Color color }) : _paint = new Paint()..color = color;
 
   void update(PointerEvent event) {
     x = event.x;
@@ -45,7 +49,7 @@ class RenderTouchDemo extends RenderBox {
   void handleEvent(Event event, BoxHitTestEntry entry) {
     switch (event.type) {
       case 'pointerdown':
-        int color = colors[event.pointer.remainder(colors.length)];
+        Color color = colors[event.pointer.remainder(colors.length)];
         dots[event.pointer] = new Dot(color: color)..update(event);
         break;
       case 'pointerup':
@@ -66,14 +70,23 @@ class RenderTouchDemo extends RenderBox {
   }
 
   void paint(RenderObjectDisplayList canvas) {
-    dots.forEach((_, Dot dot) {
+    Paint white = new Paint()..color = const Color(0xFFFFFFFF);
+    canvas.drawRect(new Rect.fromSize(size), white);
+    for (Dot dot in dots.values)
       dot.paint(canvas);
-    });
   }
 }
 
 AppView app;
 
 void main() {
-  app = new AppView(new RenderTouchDemo());
+  var para = new RenderParagraph(text: "Touch me!");
+  var stack = new RenderStack(children: [
+    new RenderTouchDemo(),
+    para,
+  ]);
+  // Make the paragraph not fill the whole screen so it doesn't eat events.
+  para.parentData..top = 40.0
+                 ..left = 20.0;
+  app = new AppView(stack);
 }

sdk/lib/framework/rendering/box.dart

@@ -134,19 +134,12 @@ class BoxConstraints {
   final double minHeight;
   final double maxHeight;
 
-  static double _clamp({double min: 0.0, double value: 0.0, double max: double.INFINITY}) {
-    assert(min != null);
-    assert(value != null);
-    assert(max != null);
-    return math.max(min, math.min(max, value));
-  }
-
   double constrainWidth(double width) {
-    return _clamp(min: minWidth, max: maxWidth, value: width);
+    return clamp(min: minWidth, max: maxWidth, value: width);
   }
 
   double constrainHeight(double height) {
-    return _clamp(min: minHeight, max: maxHeight, value: height);
+    return clamp(min: minHeight, max: maxHeight, value: height);
   }
 
   Size constrain(Size size) {
@@ -190,19 +183,19 @@ abstract class RenderBox extends RenderObject {
       child.parentData = new BoxParentData();
   }
 
-  // getMinIntrinsicWidth() should return the minimum width that this box could 
+  // getMinIntrinsicWidth() should return the minimum width that this box could
   // be without failing to render its contents within itself.
   double getMinIntrinsicWidth(BoxConstraints constraints) {
     return constraints.constrainWidth(0.0);
   }
 
-  // getMaxIntrinsicWidth() should return the smallest width beyond which 
+  // getMaxIntrinsicWidth() should return the smallest width beyond which
   // increasing the width never decreases the height.
   double getMaxIntrinsicWidth(BoxConstraints constraints) {
     return constraints.constrainWidth(0.0);
   }
 
-  // getMinIntrinsicHeight() should return the minimum height that this box could 
+  // getMinIntrinsicHeight() should return the minimum height that this box could
   // be without failing to render its contents within itself.
   double getMinIntrinsicHeight(BoxConstraints constraints) {
     return constraints.constrainHeight(0.0);

sdk/lib/framework/rendering/object.dart

@@ -2,10 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import '../node.dart';
-import '../scheduler.dart' as scheduler;
+import 'dart:math' as math;
 import 'dart:sky' as sky;
 import 'dart:sky' show Point, Size, Rect, Color, Paint, Path;
+
+import '../node.dart';
+import '../scheduler.dart' as scheduler;
+
 export 'dart:sky' show Point, Size, Rect, Color, Paint, Path;
 
 class ParentData {
@@ -266,6 +269,13 @@ class HitTestResult {
   }
 }
 
+double clamp({ double min: 0.0, double value: 0.0, double max: double.INFINITY }) {
+  assert(min != null);
+  assert(value != null);
+  assert(max != null);
+  return math.max(min, math.min(max, value));
+}
+
 
 // GENERIC MIXIN FOR RENDER NODES WITH ONE CHILD
 

sky_home.dart

@@ -29,18 +29,18 @@ class SkyHome extends App {
 
   UINode build() {
     List<UINode> children = [
-      new SkyLink('Stocks2 App', '/examples/stocks2/lib/stock_app.dart'),
-      new SkyLink('Interactive Flex', '/examples/raw/interactive_flex.dart'),
-      new SkyLink('Ink Well', '/examples/raw/ink_well.dart'),
-      new SkyLink('Box2D Game', '/examples/game/main.dart'),
-      new SkyLink('Sector Layout', '/examples/raw/sector_layout.dart'),
+      new SkyLink('Stocks2 App', 'examples/stocks2/lib/stock_app.dart'),
+      new SkyLink('Box2D Game', 'examples/game/main.dart'),
+      new SkyLink('Interactive Flex', 'examples/rendering/interactive_flex.dart'),
+      new SkyLink('Sector Layout', 'examples/rendering/sector_layout.dart'),
+      new SkyLink('Touch Demo', 'examples/rendering/touch_demo.dart'),
 
       // TODO(eseidel): We could use to separate these groups?
-      new SkyLink('Stocks App (Old)', '/examples/stocks/main.sky'),
-      new SkyLink('Touch Demo (Old)', '/examples/raw/touch-demo.sky'),
-      new SkyLink('Spinning Square (Old)', '/examples/raw/spinning-square.sky'),
+      new SkyLink('Stocks App (Old)', 'examples/stocks/main.sky'),
+      new SkyLink('Touch Demo (Old)', 'examples/raw/touch-demo.sky'),
+      new SkyLink('Spinning Square (Old)', 'examples/raw/spinning-square.sky'),
 
-      new SkyLink('Licences (Old)', '/LICENSES.sky'),
+      new SkyLink('Licences (Old)', 'LICENSES.sky'),
     ];
 
     return new Scaffold(