flutter_view_controller.cc

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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.
 
#include "include/flutter/flutter_view_controller.h"
 
#include <algorithm>
#include <iostream>
 
namespace flutter {
 
FlutterViewController::FlutterViewController(int width,
                                             int height,
                                             const DartProject& project) {
  engine_ = std::make_shared<FlutterEngine>(project);
  controller_ = FlutterDesktopViewControllerCreate(width, height,
                                                   engine_->RelinquishEngine());
  if (!controller_) {
    std::cerr << "Failed to create view controller." << std::endl;
    return;
  }
  view_ = std::make_unique<FlutterView>(
      FlutterDesktopViewControllerGetView(controller_));
}
 
FlutterViewController::~FlutterViewController() {
  if (controller_) {
    FlutterDesktopViewControllerDestroy(controller_);
  }
}
 
FlutterViewId FlutterViewController::view_id() const {
  auto view_id = FlutterDesktopViewControllerGetViewId(controller_);
 
  return static_cast<FlutterViewId>(view_id);
}
 
void FlutterViewController::ForceRedraw() {
  FlutterDesktopViewControllerForceRedraw(controller_);
}
 
std::optional<LRESULT> FlutterViewController::HandleTopLevelWindowProc(
    HWND hwnd,
    UINT message,
    WPARAM wparam,
    LPARAM lparam) {
  LRESULT result;
  bool handled = FlutterDesktopViewControllerHandleTopLevelWindowProc(
      controller_, hwnd, message, wparam, lparam, &result);
  return handled ? result : std::optional<LRESULT>(std::nullopt);
}
 
}  // namespace flutter