Improve Material ink effects

sky/engine/core/events/GestureEvent.h

Index: sky/engine/core/events/GestureEvent.h
diff --git a/sky/engine/core/events/GestureEvent.h b/sky/engine/core/events/GestureEvent.h
index f67b18936584f21fbdd120967f5e5e2ad7acbe89..e6c46c539c32cb0e32aad966ea53f529083bbe0e 100644
--- a/sky/engine/core/events/GestureEvent.h
+++ b/sky/engine/core/events/GestureEvent.h
@@ -11,6 +11,7 @@
 namespace blink {
 
 struct GestureEventInit : public EventInit {
+    int primaryPointer = 0;
     double x = 0;
     double y = 0;
     double dx = 0;
@@ -38,6 +39,7 @@ public:
     ~GestureEvent() override;
     const AtomicString& interfaceName() const override;
 
+    int primaryPointer() const { return m_primaryPointer; }

[eseidel, 2015/03/19 18:00:36]

dart 'get' has spoiled me.

     float x() const { return m_x; }
     float y() const { return m_y; }
     float dx() const { return m_dx; }
@@ -50,6 +52,7 @@ private:
     explicit GestureEvent(const WebGestureEvent&);
     GestureEvent(const AtomicString& type, const GestureEventInit&);
 
+    int m_primaryPointer;
     float m_x;
     float m_y;
     float m_dx;