Compute the enclosing rectangle for circles/ellipses generated from a series of touch events

For a sequence of {touchstart, touchmove*, touchend} events, compute the rectangle that encloses all of the circles/ellipses corresponding to the touch events. If the hardware is capable of collecting radius_x or radius_y, use the maximum of these two values as the radii values for the touch region. Otherwise use a default radius value of 15.

BUG=122190
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10262023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137753 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 20 insertions, 0 deletions

diff --git a/ui/views/events/event.cc b/ui/views/events/event.cc
index 6954db6..fa8ce36 100644
--- a/ui/views/events/event.cc
+++ b/ui/views/events/event.cc
@@ -171,6 +171,22 @@ TouchEvent* TouchEvent::Copy() const {
       flags(), touch_id_, radius_x_, radius_y_, rotation_angle_, force_);
 }
 
+float TouchEvent::RadiusX() const {
+  return radius_x_;
+}
+
+float TouchEvent::RadiusY() const {
+  return radius_y_;
+}
+
+float TouchEvent::RotationAngle() const {
+  return rotation_angle_;
+}
+
+float TouchEvent::Force() const {
+  return force_;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TouchEvent, private:
 
diff --git a/ui/views/events/event.h b/ui/views/events/event.h
index 46a9e2b..425bb1c 100644
--- a/ui/views/events/event.h
+++ b/ui/views/events/event.h
@@ -248,6 +248,10 @@ class VIEWS_EXPORT TouchEvent : public LocatedEvent,
   virtual int GetEventFlags() const OVERRIDE;
   virtual base::TimeDelta GetTimestamp() const OVERRIDE;
   virtual TouchEvent* Copy() const OVERRIDE;
+  virtual float RadiusX() const OVERRIDE;
+  virtual float RadiusY() const OVERRIDE;
+  virtual float RotationAngle() const OVERRIDE;
+  virtual float Force() const OVERRIDE;
 
  private:
   friend class internal::RootView;