flutter::HostWindowSized Class Reference

#include <host_window_sized.h>

Inheritance diagram for flutter::HostWindowSized:

Protected Member Functions
	HostWindowSized (WindowManager *window_manager, FlutterWindowsEngine *engine, bool resizable)
	~HostWindowSized () override=0
FlutterWindowsViewSizingDelegate *	AsSizingDelegate ()
virtual void	ApplyContentSize (int32_t physical_width, int32_t physical_height)
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	HandleWindowActivation (HWND hwnd, WPARAM wparam)
void	EnableRecursively (bool enable)
HostWindow *	FindFirstEnabledDescendant () const
WindowArchetype	GetArchetype () const
std::vector< HostWindow * >	GetOwnedWindows () const
void	DisableRecursively ()
	FML_DISALLOW_COPY_AND_ASSIGN (HostWindow)

Protected Attributes
const bool	resizable_
std::shared_ptr< int >	view_alive_
int	physical_width_ = 0
int	physical_height_ = 0
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_

Additional Inherited Members
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 ()
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, bool sized_to_content, bool resizable)
static std::unique_ptr< HostWindow >	CreateDialogWindow (WindowManager *window_manager, FlutterWindowsEngine *engine, const WindowSizeRequest &preferred_size, const WindowConstraints &preferred_constraints, LPCWSTR title, HWND parent, bool sized_to_content, bool resizable)
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)
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)

Detailed Description

Definition at line 25 of file host_window_sized.h.

Constructor & Destructor Documentation

HostWindowSized()

flutter::HostWindowSized::HostWindowSized ( WindowManager *  window_manager, FlutterWindowsEngine *  engine, bool  resizable  )

protected

Definition at line 13 of file host_window_sized.cc.

    : HostWindow(window_manager, engine),
      resizable_(resizable),
      view_alive_(std::make_shared<int>(0)) {}

~HostWindowSized()

flutter::HostWindowSized::~HostWindowSized ( )

overrideprotectedpure virtual

Definition at line 20 of file host_window_sized.cc.

                                  {
  // By the time the base destructor runs, the most-derived class must have
  // already reset |view_controller_| (and therefore stopped the raster thread
  // from sizing this object). See the destructor comment in host_window_sized.h
  // for the rationale. If this fires, a HostWindowSized subclass is missing the
  // required |view_controller_.reset()| at the start of its destructor.
  FML_DCHECK(!view_controller_)
      << "HostWindowSized subclass must reset view_controller_ in its "
         "destructor.";
}

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

Member Function Documentation

ApplyContentSize()

void flutter::HostWindowSized::ApplyContentSize ( int32_t  physical_width, int32_t  physical_height  )

protectedvirtual

Reimplemented in flutter::HostWindowPopup, and flutter::HostWindowTooltip.

Definition at line 52 of file host_window_sized.cc.

                                                                {
  WINDOWINFO window_info = {.cbSize = sizeof(WINDOWINFO)};
  GetWindowInfo(window_handle_, &window_info);
 
  // Convert physical pixels to logical pixels.
  UINT const dpi = GetDpiForHWND(window_handle_);
  double const scale = static_cast<double>(dpi > 0 ? dpi : 96) / 96.0;
  std::optional<Size> const window_size = GetWindowSizeForClientSize(
      *engine_->windows_proc_table(),
      Size(physical_width / scale, physical_height / scale),
      box_constraints_.smallest(), box_constraints_.biggest(),
      window_info.dwStyle, window_info.dwExStyle, nullptr);
 
  if (!window_size) {
    return;
  }
 
  SetWindowPos(window_handle_, NULL, 0, 0, window_size->width(),
               window_size->height(),
               SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
 
  if (resizable_) {
    // For resizable windows, stop tracking content size after the initial
    // frame so subsequent user-initiated resizes are forwarded to Flutter.
    view_controller_->view()->SetSizedToContent(false);
  }
}

References flutter::BoxConstraints::biggest(), flutter::HostWindow::box_constraints_, flutter::HostWindow::engine_, flutter::GetDpiForHWND(), flutter::HostWindow::GetWindowSizeForClientSize(), resizable_, flutter::BoxConstraints::smallest(), flutter::HostWindow::view_controller_, flutter::HostWindow::window_handle_, and flutter::FlutterWindowsEngine::windows_proc_table().

AsSizingDelegate()

FlutterWindowsViewSizingDelegate * flutter::HostWindowSized::AsSizingDelegate ( )

inlineprotected

Definition at line 59 of file host_window_sized.h.

{ return this; }

Referenced by flutter::HostWindowDialog::HostWindowDialog(), flutter::HostWindowPopup::HostWindowPopup(), flutter::HostWindowRegular::HostWindowRegular(), and flutter::HostWindowTooltip::HostWindowTooltip().

Member Data Documentation

physical_height_

int flutter::HostWindowSized::physical_height_ = 0

protected

Definition at line 78 of file host_window_sized.h.

Referenced by flutter::HostWindowPopup::UpdatePosition(), and flutter::HostWindowTooltip::UpdatePosition().

physical_width_

int flutter::HostWindowSized::physical_width_ = 0

protected

Definition at line 77 of file host_window_sized.h.

Referenced by flutter::HostWindowPopup::UpdatePosition(), and flutter::HostWindowTooltip::UpdatePosition().

resizable_

const bool flutter::HostWindowSized::resizable_

protected

Definition at line 70 of file host_window_sized.h.

Referenced by ApplyContentSize().

view_alive_

std::shared_ptr<int> flutter::HostWindowSized::view_alive_

protected

Definition at line 74 of file host_window_sized.h.

---

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

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