1#include "flutter_window.h"
 2
 3#include <optional>
 4
 5#include "flutter/generated_plugin_registrant.h"
 6
 7FlutterWindow::FlutterWindow(const flutter::DartProject& project)
 8    : project_(project) {}
 9
10FlutterWindow::~FlutterWindow() {}
11
12bool FlutterWindow::OnCreate() {
13  if (!Win32Window::OnCreate()) {
14    return false;
15  }
16
17  RECT frame = GetClientArea();
18
19  // The size here must match the window dimensions to avoid unnecessary surface
20  // creation / destruction in the startup path.
21  flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
22      frame.right - frame.left, frame.bottom - frame.top, project_);
23  // Ensure that basic setup of the controller was successful.
24  if (!flutter_controller_->engine() || !flutter_controller_->view()) {
25    return false;
26  }
27  RegisterPlugins(flutter_controller_->engine());
28  SetChildContent(flutter_controller_->view()->GetNativeWindow());
29
30  flutter_controller_->engine()->SetNextFrameCallback([&]() {
31    this->Show();
32  });
33
34  return true;
35}
36
37void FlutterWindow::OnDestroy() {
38  if (flutter_controller_) {
39    flutter_controller_ = nullptr;
40  }
41
42  Win32Window::OnDestroy();
43}
44
45LRESULT
46FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
47                              WPARAM const wparam,
48                              LPARAM const lparam) noexcept {
49  // Give Flutter, including plugins, an opportunity to handle window messages.
50  if (flutter_controller_) {
51    std::optional<LRESULT> result =
52        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
53                                                      lparam);
54    if (result) {
55      return *result;
56    }
57  }
58
59  switch (message) {
60    case WM_FONTCHANGE:
61      flutter_controller_->engine()->ReloadSystemFonts();
62      break;
63  }
64
65  return Win32Window::MessageHandler(hwnd, message, wparam, lparam);
66}