Change the color of the spinning cube on click.

mojo/examples/sample_app/spinning_cube.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_EXAMPLES_SAMPLE_APP_SPINNING_CUBE_H_
 #define MOJO_EXAMPLES_SAMPLE_APP_SPINNING_CUBE_H_
 
 #include <stdint.h>
 
 #include "base/memory/scoped_ptr.h"
 
 namespace mojo {
 namespace examples {
 
 class SpinningCube {
  public:
   SpinningCube();
   ~SpinningCube();
 
   void Init(uint32_t width, uint32_t height);
   void set_direction(int direction) { direction_ = direction; }
+  void set_color(float r, float g, float b) {
+    color_[0] = r;
+    color_[1] = g;
+    color_[2] = b;
+  }
   void SetFlingMultiplier(float drag_distance, float drag_time);
   void UpdateForTimeDelta(float delta_time);
   void UpdateForDragDistance(float distance);
   void Draw();
 
   void OnGLContextLost();
 
  private:
   class GLState;
 
   void Update();
 
   bool initialized_;
   uint32_t width_;
   uint32_t height_;
   scoped_ptr<GLState> state_;
   float fling_multiplier_;
   int direction_;
+  float color_[3];
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 #endif  // MOJO_EXAMPLES_SAMPLE_APP_SPINNING_CUBE_H_