| // 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 "flutter_window.h" |
| |
| #include <optional> |
| |
| #include "flutter/generated_plugin_registrant.h" |
| |
| FlutterWindow::FlutterWindow(const flutter::DartProject& project) |
| : project_(project) {} |
| |
| FlutterWindow::~FlutterWindow() {} |
| |
| bool FlutterWindow::OnCreate() { |
| if (!Win32Window::OnCreate()) { |
| return false; |
| } |
| |
| RECT frame = GetClientArea(); |
| |
| // The size here must match the window dimensions to avoid unnecessary surface |
| // creation / destruction in the startup path. |
| flutter_controller_ = std::make_unique<flutter::FlutterViewController>( |
| frame.right - frame.left, frame.bottom - frame.top, project_); |
| // Ensure that basic setup of the controller was successful. |
| if (!flutter_controller_->engine() || !flutter_controller_->view()) { |
| return false; |
| } |
| RegisterPlugins(flutter_controller_->engine()); |
| SetChildContent(flutter_controller_->view()->GetNativeWindow()); |
| |
| flutter_controller_->engine()->SetNextFrameCallback([&]() { this->Show(); }); |
| |
| // Flutter can complete the first frame before the "show window" callback is |
| // registered. The following call ensures a frame is pending to ensure the |
| // window is shown. It is a no-op if the first frame hasn't completed yet. |
| flutter_controller_->ForceRedraw(); |
| |
| return true; |
| } |
| |
| void FlutterWindow::OnDestroy() { |
| if (flutter_controller_) { |
| flutter_controller_ = nullptr; |
| } |
| |
| Win32Window::OnDestroy(); |
| } |
| |
| LRESULT |
| FlutterWindow::MessageHandler(HWND hwnd, UINT const message, |
| WPARAM const wparam, |
| LPARAM const lparam) noexcept { |
| // Give Flutter, including plugins, an opportunity to handle window messages. |
| if (flutter_controller_) { |
| std::optional<LRESULT> result = |
| flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam, |
| lparam); |
| if (result) { |
| return *result; |
| } |
| } |
| |
| switch (message) { |
| case WM_FONTCHANGE: |
| flutter_controller_->engine()->ReloadSystemFonts(); |
| break; |
| } |
| |
| return Win32Window::MessageHandler(hwnd, message, wparam, lparam); |
| } |