flutter::HostWindowPopup Class Reference

#include <host_window_popup.h>

Inheritance diagram for flutter::HostWindowPopup:

Public Member Functions
	HostWindowPopup (WindowManager *window_manager, FlutterWindowsEngine *engine, const BoxConstraints &constraints, GetWindowPositionCallback get_position_callback, HWND parent)
void	UpdatePosition ()
Public Member Functions inherited from flutter::HostWindow
virtual	~HostWindow ()
HWND	GetWindowHandle () const
HWND	GetFlutterViewWindowHandle () const
void	SetContentSize (const WindowSizeRequest &size)
void	SetConstraints (const WindowConstraints &constraints)
virtual void	SetFullscreen (bool fullscreen, std::optional< FlutterEngineDisplayId > display_id)
virtual bool	GetFullscreen () const
HostWindow *	GetOwnerWindow () const
void	UpdateModalStateLayer ()

Additional Inherited Members
Static Public Member Functions inherited from flutter::HostWindow
static std::unique_ptr< HostWindow >	CreateRegularWindow (WindowManager *window_manager, FlutterWindowsEngine *engine, const WindowSizeRequest &preferred_size, const WindowConstraints &preferred_constraints, LPCWSTR title)
static std::unique_ptr< HostWindow >	CreateDialogWindow (WindowManager *window_manager, FlutterWindowsEngine *engine, const WindowSizeRequest &preferred_size, const WindowConstraints &preferred_constraints, LPCWSTR title, HWND parent)
static std::unique_ptr< HostWindow >	CreateTooltipWindow (WindowManager *window_manager, FlutterWindowsEngine *engine, const WindowConstraints &preferred_constraints, GetWindowPositionCallback get_position_callback, HWND parent)
static std::unique_ptr< HostWindow >	CreatePopupWindow (WindowManager *window_manager, FlutterWindowsEngine *engine, const WindowConstraints &preferred_constraints, GetWindowPositionCallback get_position_callback, HWND parent)
static HostWindow *	GetThisFromHandle (HWND hwnd)
static ActualWindowSize	GetWindowContentSize (HWND hwnd)
Protected Member Functions inherited from flutter::HostWindow
void	InitializeFlutterView (HostWindowInitializationParams const &params)
	HostWindow (WindowManager *window_manager, FlutterWindowsEngine *engine)
virtual LRESULT	HandleMessage (HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
void	EnableRecursively (bool enable)
HostWindow *	FindFirstEnabledDescendant () const
WindowArchetype	GetArchetype () const
std::vector< HostWindow * >	GetOwnedWindows () const
void	DisableRecursively ()
	FML_DISALLOW_COPY_AND_ASSIGN (HostWindow)
Static Protected Member Functions inherited from flutter::HostWindow
static std::optional< Size >	GetWindowSizeForClientSize (WindowsProcTable const &win32, Size const &client_size, std::optional< Size > smallest, std::optional< Size > biggest, DWORD window_style, DWORD extended_window_style, std::optional< HWND > const &owner_hwnd)
static void	FocusRootViewOf (HostWindow *window)
static LRESULT	WndProc (HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
Protected Attributes inherited from flutter::HostWindow
friend	WindowManager
WindowManager *const	window_manager_ = nullptr
FlutterWindowsEngine *	engine_
std::unique_ptr< FlutterWindowsViewController >	view_controller_
WindowArchetype	archetype_ = WindowArchetype::kRegular
HWND	window_handle_
BoxConstraints	box_constraints_
bool	is_being_destroyed_ = false
bool	is_fullscreen_ = false
SavedWindowInfo	saved_window_info_
Microsoft::WRL::ComPtr< ITaskbarList2 >	task_bar_list_

Detailed Description

Definition at line 14 of file host_window_popup.h.

Constructor & Destructor Documentation

HostWindowPopup()

flutter::HostWindowPopup::HostWindowPopup	(	WindowManager *	window_manager,
		FlutterWindowsEngine *	engine,
		const BoxConstraints &	constraints,
		GetWindowPositionCallback	get_position_callback,
		HWND	parent
	)

Definition at line 12 of file host_window_popup.cc.

    : HostWindow(window_manager, engine),
      get_position_callback_(get_position_callback),
      parent_(parent),
      isolate_(Isolate::Current()),
      view_alive_(std::make_shared<int>(0)) {
  // Use minimum constraints as initial size to ensure the view can be created
  // with valid metrics. The size will be updated when content is rendered.
  auto const initial_width =
      static_cast<double>(constraints.smallest().width());
  auto const initial_height =
      static_cast<double>(constraints.smallest().height());
 
  InitializeFlutterView(HostWindowInitializationParams{
      .archetype = WindowArchetype::kPopup,
      .window_style = WS_POPUP,
      .extended_window_style = WS_EX_NOACTIVATE | WS_EX_TOOLWINDOW,
      .box_constraints = constraints,
      .initial_window_rect = {{0, 0}, {initial_width, initial_height}},
      .title = L"",
      .owner_window = parent,
      .nCmdShow = SW_SHOWNOACTIVATE,
      .sizing_delegate = this,
      .is_sized_to_content = true});
}

References flutter::HostWindow::HostWindowInitializationParams::archetype, flutter::Size::height(), flutter::HostWindow::InitializeFlutterView(), flutter::kPopup, flutter::BoxConstraints::smallest(), and flutter::Size::width().

Member Function Documentation

UpdatePosition()

void flutter::HostWindowPopup::UpdatePosition

(

)

Definition at line 82 of file host_window_popup.cc.

                                     {
  RECT parent_client_rect;
  GetClientRect(parent_, &parent_client_rect);
 
  // Convert top-left and bottom-right points to screen coordinates.
  POINT parent_top_left = {parent_client_rect.left, parent_client_rect.top};
  POINT parent_bottom_right = {parent_client_rect.right,
                               parent_client_rect.bottom};
 
  ClientToScreen(parent_, &parent_top_left);
  ClientToScreen(parent_, &parent_bottom_right);
 
  // Get monitor from HWND and usable work area.
  HMONITOR monitor = MonitorFromWindow(parent_, MONITOR_DEFAULTTONEAREST);
  WindowRect work_area = GetWorkArea();
 
  IsolateScope scope(isolate_);
 
  // Frees the memory allocated by the positioner callback.
  // Even if the callback throws an exception, the memory will be freed when
  // rect goes out of scope.
  std::unique_ptr<WindowRect, decltype(&free)> rect(
      get_position_callback_(
          WindowSize{width_, height_},
          WindowRect{parent_top_left.x, parent_top_left.y,
                     parent_bottom_right.x - parent_top_left.x,
                     parent_bottom_right.y - parent_top_left.y},
          work_area),
      free);
  SetWindowPos(window_handle_, HWND_TOP, rect->left, rect->top, rect->width,
               rect->height, SWP_NOACTIVATE | SWP_NOOWNERZORDER);
 
  // The positioner constrained the dimensions more than current size, apply
  // positioner constraints.
  if (rect->width < width_ || rect->height < height_) {
    auto metrics_event = view_controller_->view()->CreateWindowMetricsEvent();
    view_controller_->engine()->SendWindowMetricsEvent(metrics_event);
  }
}

References flutter::HostWindow::view_controller_, and flutter::HostWindow::window_handle_.

Referenced by InternalFlutterWindows_WindowManager_UpdatePopupPosition().

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

• shell/platform/windows/host_window_popup.h
• shell/platform/windows/host_window_popup.cc