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flutter::WindowProcDelegateManager Class Reference

`#include <window_proc_delegate_manager.h>`

## Public Member Functions
| WindowProcDelegateManager ()
| ~WindowProcDelegateManager ()
void | RegisterTopLevelWindowProcDelegate (FlutterDesktopWindowProcCallback callback, void *user_data)
void | UnregisterTopLevelWindowProcDelegate (FlutterDesktopWindowProcCallback callback)
std::optional< LRESULT > | OnTopLevelWindowProc (HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) const

## Detailed Description

Definition at line 20 of file window_proc_delegate_manager.h.

## Constructor & Destructor Documentation

## ◆ WindowProcDelegateManager()

flutter::WindowProcDelegateManager::WindowProcDelegateManager | ( |  | ) |
| explicit default

## ◆ ~WindowProcDelegateManager()

flutter::WindowProcDelegateManager::~WindowProcDelegateManager | ( |  | ) |
| default

## Member Function Documentation

## ◆ OnTopLevelWindowProc()

std::optional< LRESULT > flutter::WindowProcDelegateManager::OnTopLevelWindowProc | ( | HWND | hwnd,
|  | UINT | message,
|  | WPARAM | wparam,
|  | LPARAM | lparam
| ) |  | const

Definition at line 37 of file window_proc_delegate_manager.cc.

41 {
42 std::optional<LRESULT> result;
43 for (const auto& delegate : delegates_) {
44 LPARAM handler_result;
45 // Stop as soon as any delegate indicates that it has handled the message.
46 if (delegate.callback(hwnd, message, wparam, lparam, delegate.user_data,
47 &handler_result)) {
48 result = handler_result;
49 break;
50 }
51 }
52 return result;
53 }

References message.

Referenced by flutter::testing::TEST().

## ◆ RegisterTopLevelWindowProcDelegate()

void flutter::WindowProcDelegateManager::RegisterTopLevelWindowProcDelegate | ( | FlutterDesktopWindowProcCallback | callback,
|  | void * | user_data
| ) |  |

Definition at line 16 of file window_proc_delegate_manager.cc.

18 {
19 UnregisterTopLevelWindowProcDelegate(callback);
20
21 delegates_.push_back(WindowProcDelegate{
22 .callback = callback,
23 .user_data = user_data,
24 });
25 }

References callback, UnregisterTopLevelWindowProcDelegate(), and user_data.

Referenced by FlutterDesktopPluginRegistrarRegisterTopLevelWindowProcDelegate(), and flutter::testing::TEST().

## ◆ UnregisterTopLevelWindowProcDelegate()

void flutter::WindowProcDelegateManager::UnregisterTopLevelWindowProcDelegate | ( | FlutterDesktopWindowProcCallback | callback | ) |

Definition at line 27 of file window_proc_delegate_manager.cc.

28 {
29 delegates_.erase(
30 std::remove_if(delegates_.begin(), delegates_.end(),
31 [&callback](const WindowProcDelegate& delegate) {
32 return delegate.callback == callback;
33 }),
34 delegates_.end());
35 }

References callback.

Referenced by FlutterDesktopPluginRegistrarUnregisterTopLevelWindowProcDelegate(), RegisterTopLevelWindowProcDelegate(), and flutter::testing::TEST().

The documentation for this class was generated from the following files:

- shell/platform/windows/window_proc_delegate_manager.h
- shell/platform/windows/window_proc_delegate_manager.cc

user_data
void * user_data
Definition: flutter_windows_view_unittests.cc:53
flutter::WindowProcDelegateManager::UnregisterTopLevelWindowProcDelegate
void UnregisterTopLevelWindowProcDelegate(FlutterDesktopWindowProcCallback callback)
Definition: window_proc_delegate_manager.cc:27
flutter::WindowProcDelegate
std::function< std::optional< LRESULT >(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)> WindowProcDelegate
Definition: plugin_registrar_windows.h:24
message
Win32Message message
Definition: keyboard_unittests.cc:137
callback
FlutterDesktopBinaryReply callback
Definition: flutter_windows_view_unittests.cc:52