[NaCl SDK] Cleanup examples.

native_client_sdk/src/examples/api/mouse_lock/mouselock.h

-// Copyright (c) 2012 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.
-
-#include <cmath>
-
-#include "ppapi/c/ppb_fullscreen.h"
-#include "ppapi/c/ppb_input_event.h"
-#include "ppapi/cpp/completion_callback.h"
-#include "ppapi/cpp/fullscreen.h"
-#include "ppapi/cpp/mouse_lock.h"
-#include "ppapi/cpp/graphics_2d.h"
-#include "ppapi/cpp/image_data.h"
-#include "ppapi/cpp/input_event.h"
-#include "ppapi/cpp/instance.h"
-#include "ppapi/cpp/module.h"
-#include "ppapi/cpp/rect.h"
-#include "ppapi/cpp/size.h"
-#include "ppapi/cpp/var.h"
-#include "ppapi/utility/completion_callback_factory.h"
-
-#ifdef _MSC_VER
-// Allow 'this' in initializer list
-#pragma warning(disable : 4355)
-#endif
-
-namespace mouselock {
-
-class MouseLockInstance : public pp::Instance, public pp::MouseLock {
- public:
-  explicit MouseLockInstance(PP_Instance instance)
-      : pp::Instance(instance),
-        pp::MouseLock(this),
-        mouse_locked_(false),
-        waiting_for_flush_completion_(false),
-        callback_factory_(this),
-        fullscreen_(this),
-        is_context_bound_(false),
-        was_fullscreen_(false),
-        background_scanline_(NULL) {}
-  virtual ~MouseLockInstance();
-
-  // Called by the browser when the NaCl module is loaded and all ready to go.
-  virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]);
-
-  // Called by the browser to handle incoming input events.
-  virtual bool HandleInputEvent(const pp::InputEvent& event);
-
-  // Called whenever the in-browser window changes size.
-  virtual void DidChangeView(const pp::View& view);
-
-  // Called by the browser when mouselock is lost.  This happens when the NaCl
-  // module exits fullscreen mode.
-  virtual void MouseLockLost();
-
- private:
-  // Return the Cartesian distance between two points.
-  double GetDistance(int point_1_x,
-                     int point_1_y,
-                     int point_2_x,
-                     int point_2_y) {
-    return sqrt(pow(static_cast<double>(point_1_x - point_2_x), 2) +
-                pow(static_cast<double>(point_1_y - point_2_y), 2));
-  }
-
-  // Called when mouse lock has been acquired.  Used as a callback to
-  // pp::MouseLock.LockMouse().
-  void DidLockMouse(int32_t result);
-
-  // Called when the 2D context has been flushed to the browser window.  Used
-  // as a callback to pp::Graphics2D.Flush().
-  void DidFlush(int32_t result);
-
-  // Creates a new paint buffer, paints it then flush it to the 2D context.  If
-  // a flush is pending, this does nothing.
-  void Paint();
-
-  // Create a new pp::ImageData and paint the graphics that represent the mouse
-  // movement in it.  Return the new pp::ImageData.
-  pp::ImageData PaintImage(const pp::Size& size);
-
-  // Fill the image with the background color.
-  void ClearToBackground(pp::ImageData* image);
-
-  void DrawCenterSpot(pp::ImageData* image, uint32_t spot_color);
-
-  void DrawNeedle(pp::ImageData* image, uint32_t needle_color);
-
-  // Print the printf-style format to the "console" via PostMessage.
-  void Log(const char* format, ...);
-
-  pp::Size size_;
-
-  bool mouse_locked_;
-  pp::Point mouse_movement_;
-  bool waiting_for_flush_completion_;
-  pp::CompletionCallbackFactory<MouseLockInstance> callback_factory_;
-
-  pp::Fullscreen fullscreen_;
-  pp::Graphics2D device_context_;
-  bool is_context_bound_;
-  bool was_fullscreen_;
-  uint32_t* background_scanline_;
-};
-
-}  // namespace mouselock