cursor_handler.h

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// Copyright 2013 The Flutter 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 FLUTTER_SHELL_PLATFORM_WINDOWS_CURSOR_HANDLER_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_CURSOR_HANDLER_H_
 
#include <unordered_map>
 
#include "flutter/fml/macros.h"
#include "flutter/shell/platform/common/client_wrapper/include/flutter/binary_messenger.h"
#include "flutter/shell/platform/common/client_wrapper/include/flutter/encodable_value.h"
#include "flutter/shell/platform/common/client_wrapper/include/flutter/method_channel.h"
#include "flutter/shell/platform/windows/public/flutter_windows.h"
#include "flutter/shell/platform/windows/window_binding_handler.h"
 
namespace flutter {
 
class FlutterWindowsEngine;
 
// Handler for the cursor system channel.
class CursorHandler {
 public:
  explicit CursorHandler(flutter::BinaryMessenger* messenger,
                         flutter::FlutterWindowsEngine* engine);
 
 private:
  // Called when a method is called on |channel_|;
  void HandleMethodCall(
      const flutter::MethodCall<EncodableValue>& method_call,
      std::unique_ptr<flutter::MethodResult<EncodableValue>> result);
 
  // The MethodChannel used for communication with the Flutter engine.
  std::unique_ptr<flutter::MethodChannel<EncodableValue>> channel_;
 
  // The Flutter engine that will be notified for cursor updates.
  FlutterWindowsEngine* engine_;
 
  // The cache map for custom cursors.
  std::unordered_map<std::string, HCURSOR> custom_cursors_;
 
  FML_DISALLOW_COPY_AND_ASSIGN(CursorHandler);
};
 
// Create a cursor from a rawBGRA buffer and the cursor info.
HCURSOR GetCursorFromBuffer(const std::vector<uint8_t>& buffer,
                            double hot_x,
                            double hot_y,
                            int width,
                            int height);
 
// Get the corresponding mask bitmap from the source bitmap.
void GetMaskBitmaps(HBITMAP bitmap, HBITMAP& mask_bitmap);
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_PLATFORM_WINDOWS_CURSOR_HANDLER_H_