flutter::FlutterWindowsView Class Reference

#include <flutter_windows_view.h>

Inheritance diagram for flutter::FlutterWindowsView:

Public Member Functions
	FlutterWindowsView (FlutterViewId view_id, FlutterWindowsEngine *engine, std::unique_ptr< WindowBindingHandler > window_binding, bool is_sized_to_content, const BoxConstraints &box_constraints, FlutterWindowsViewSizingDelegate *sizing_delegate=nullptr, std::shared_ptr< WindowsProcTable > windows_proc_table=nullptr)
virtual	~FlutterWindowsView ()
FlutterViewId	view_id () const
bool	IsImplicitView () const
void	CreateRenderSurface ()
egl::WindowSurface *	surface () const
virtual HWND	GetWindowHandle () const
FlutterWindowsEngine *	GetEngine () const
void	ForceRedraw ()
virtual bool	ClearSoftwareBitmap ()
virtual bool	PresentSoftwareBitmap (const void *allocation, size_t row_bytes, size_t height)
FlutterWindowMetricsEvent	CreateWindowMetricsEvent () const
void	SendInitialBounds ()
virtual void	AnnounceAlert (const std::wstring &text)
void	OnHighContrastChanged () override
bool	OnEmptyFrameGenerated ()
bool	OnFrameGenerated (size_t width, size_t height)
virtual void	OnFramePresented ()
bool	OnWindowSizeChanged (size_t width, size_t height) override
void	OnWindowRepaint () override
void	OnPointerMove (double x, double y, FlutterPointerDeviceKind device_kind, int32_t device_id, int modifiers_state) override
void	OnPointerDown (double x, double y, FlutterPointerDeviceKind device_kind, int32_t device_id, FlutterPointerMouseButtons button) override
void	OnPointerUp (double x, double y, FlutterPointerDeviceKind device_kind, int32_t device_id, FlutterPointerMouseButtons button) override
void	OnPointerLeave (double x, double y, FlutterPointerDeviceKind device_kind, int32_t device_id=0) override
virtual void	OnPointerPanZoomStart (int32_t device_id) override
virtual void	OnPointerPanZoomUpdate (int32_t device_id, double pan_x, double pan_y, double scale, double rotation) override
virtual void	OnPointerPanZoomEnd (int32_t device_id) override
void	OnText (const std::u16string &) override
void	OnKey (int key, int scancode, int action, char32_t character, bool extended, bool was_down, KeyEventCallback callback) override
void	OnFocus (FlutterViewFocusState focus_state, FlutterViewFocusDirection direction) override
void	OnComposeBegin () override
void	OnComposeCommit () override
void	OnComposeEnd () override
void	OnComposeChange (const std::u16string &text, int cursor_pos) override
void	OnScroll (double x, double y, double delta_x, double delta_y, int scroll_offset_multiplier, FlutterPointerDeviceKind device_kind, int32_t device_id) override
void	OnScrollInertiaCancel (int32_t device_id) override
virtual void	OnUpdateSemanticsEnabled (bool enabled) override
virtual gfx::NativeViewAccessible	GetNativeViewAccessible () override
virtual void	OnCursorRectUpdated (const Rect &rect)
virtual void	OnResetImeComposing ()
void	OnDwmCompositionChanged ()
ui::AXPlatformNodeWin *	AlertNode () const
virtual ui::AXFragmentRootDelegateWin *	GetAxFragmentRootDelegate () override
virtual void	UpdateSemanticsEnabled (bool enabled)
std::weak_ptr< AccessibilityBridgeWindows >	accessibility_bridge ()
void	OnWindowStateEvent (HWND hwnd, WindowStateEvent event) override
virtual bool	Focus ()

Protected Member Functions
virtual void	NotifyWinEventWrapper (ui::AXPlatformNodeWin *node, ax::mojom::Event event)
virtual std::shared_ptr< AccessibilityBridgeWindows >	CreateAccessibilityBridge ()

Friends
class	ViewModifier

Additional Inherited Members
Public Types inherited from flutter::WindowBindingHandlerDelegate
using	KeyEventCallback = std::function< void(bool)>

Detailed Description

Definition at line 46 of file flutter_windows_view.h.

Constructor & Destructor Documentation

FlutterWindowsView()

flutter::FlutterWindowsView::FlutterWindowsView	(	FlutterViewId	view_id,
		FlutterWindowsEngine *	engine,
		std::unique_ptr< WindowBindingHandler >	window_binding,
		bool	is_sized_to_content,
		const BoxConstraints &	box_constraints,
		FlutterWindowsViewSizingDelegate *	sizing_delegate = nullptr,
		std::shared_ptr< WindowsProcTable >	windows_proc_table = nullptr
	)

Definition at line 104 of file flutter_windows_view.cc.

    : view_id_(view_id),
      engine_(engine),
      is_sized_to_content_(is_sized_to_content),
      box_constraints_(box_constraints),
      sizing_delegate_(sizing_delegate),
      windows_proc_table_(std::move(windows_proc_table)) {
  if (windows_proc_table_ == nullptr) {
    windows_proc_table_ = std::make_shared<WindowsProcTable>();
  }
 
  // Take the binding handler, and give it a pointer back to self.
  binding_handler_ = std::move(window_binding);
  binding_handler_->SetView(this);
}

~FlutterWindowsView()

flutter::FlutterWindowsView::~FlutterWindowsView ( )

virtual

Definition at line 127 of file flutter_windows_view.cc.

                                        {
  // The view owns the child window.
  // Notify the engine the view's child window will no longer be visible.
  engine_->OnWindowStateEvent(GetWindowHandle(), WindowStateEvent::kHide);
 
  if (surface_) {
    DestroyWindowSurface(*engine_, std::move(surface_));
  }
}

References GetWindowHandle(), flutter::kHide, and flutter::FlutterWindowsEngine::OnWindowStateEvent().

Member Function Documentation

accessibility_bridge()

std::weak_ptr<AccessibilityBridgeWindows> flutter::FlutterWindowsView::accessibility_bridge ( )

inline

Definition at line 254 of file flutter_windows_view.h.

                                                                 {
    return accessibility_bridge_;
  }

Referenced by flutter::FlutterWindowsEngine::Run().

AlertNode()

ui::AXPlatformNodeWin * flutter::FlutterWindowsView::AlertNode

(

)

const

Definition at line 851 of file flutter_windows_view.cc.

                                                         {
  return binding_handler_->GetAlert();
}

AnnounceAlert()

void flutter::FlutterWindowsView::AnnounceAlert ( const std::wstring &  text )

virtual

Definition at line 830 of file flutter_windows_view.cc.

                                                             {
  auto alert_delegate = binding_handler_->GetAlertDelegate();
  if (!alert_delegate) {
    return;
  }
  alert_delegate->SetText(fml::WideStringToUtf16(text));
  ui::AXPlatformNodeWin* alert_node = binding_handler_->GetAlert();
  NotifyWinEventWrapper(alert_node, ax::mojom::Event::kAlert);
}

References NotifyWinEventWrapper(), and text.

ClearSoftwareBitmap()

bool flutter::FlutterWindowsView::ClearSoftwareBitmap ( )

virtual

Definition at line 742 of file flutter_windows_view.cc.

                                             {
  return binding_handler_->OnBitmapSurfaceCleared();
}

Referenced by flutter::CompositorSoftware::Present().

CreateAccessibilityBridge()

std::shared_ptr< AccessibilityBridgeWindows > flutter::FlutterWindowsView::CreateAccessibilityBridge ( )

protectedvirtual

Definition at line 856 of file flutter_windows_view.cc.

                                              {
  return std::make_shared<AccessibilityBridgeWindows>(this);
}

Referenced by UpdateSemanticsEnabled().

CreateRenderSurface()

void flutter::FlutterWindowsView::CreateRenderSurface

(

)

Definition at line 761 of file flutter_windows_view.cc.

                                             {
  FML_DCHECK(surface_ == nullptr);
 
  if (engine_->egl_manager()) {
    PhysicalWindowBounds bounds = binding_handler_->GetPhysicalWindowBounds();
    surface_ = engine_->egl_manager()->CreateWindowSurface(
        GetWindowHandle(), bounds.width, bounds.height);
 
    UpdateVsync(*engine_, surface_.get(), NeedsVsync());
 
    resize_target_width_ = bounds.width;
    resize_target_height_ = bounds.height;
  }
}

References flutter::egl::Manager::CreateWindowSurface(), flutter::FlutterWindowsEngine::egl_manager(), GetWindowHandle(), flutter::PhysicalWindowBounds::height, and flutter::PhysicalWindowBounds::width.

CreateWindowMetricsEvent()

FlutterWindowMetricsEvent flutter::FlutterWindowsView::CreateWindowMetricsEvent

(

)

const

Definition at line 413 of file flutter_windows_view.cc.

                                                                             {
  PhysicalWindowBounds bounds = binding_handler_->GetPhysicalWindowBounds();
  double pixel_ratio = binding_handler_->GetDpiScale();
  FlutterEngineDisplayId display_id = binding_handler_->GetDisplayId();
 
  FlutterWindowMetricsEvent event = {};
  event.struct_size = sizeof(event);
  event.width = bounds.width;
  event.height = bounds.height;
  auto constraints = GetConstraints();
  event.has_constraints = true;
  event.min_width_constraint =
      static_cast<size_t>(constraints.smallest().width());
  event.min_height_constraint =
      static_cast<size_t>(constraints.smallest().height());
  event.max_width_constraint =
      static_cast<size_t>(constraints.biggest().width());
  event.max_height_constraint =
      static_cast<size_t>(constraints.biggest().height());
  event.pixel_ratio = pixel_ratio;
  event.display_id = display_id;
  event.view_id = view_id_;
 
  return event;
}

References flutter::PhysicalWindowBounds::height, and flutter::PhysicalWindowBounds::width.

Referenced by SendInitialBounds().

Focus()

bool flutter::FlutterWindowsView::Focus ( )

virtual

Definition at line 880 of file flutter_windows_view.cc.

                               {
  return binding_handler_->Focus();
}

Referenced by flutter::FlutterWindowsEngine::OnViewFocusChangeRequest().

ForceRedraw()

void flutter::FlutterWindowsView::ForceRedraw

(

)

Definition at line 194 of file flutter_windows_view.cc.

                                     {
  if (resize_status_ == ResizeState::kDone) {
    // Request new frame.
    engine_->ScheduleFrame();
  }
}

References flutter::FlutterWindowsEngine::ScheduleFrame().

Referenced by OnWindowRepaint().

GetAxFragmentRootDelegate()

ui::AXFragmentRootDelegateWin * flutter::FlutterWindowsView::GetAxFragmentRootDelegate ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 847 of file flutter_windows_view.cc.

                                                                           {
  return accessibility_bridge_.get();
}

GetEngine()

FlutterWindowsEngine * flutter::FlutterWindowsView::GetEngine

(

)

const

Definition at line 826 of file flutter_windows_view.cc.

                                                          {
  return engine_;
}

Referenced by flutter::AccessibilityBridgeWindows::DispatchAccessibilityAction(), and FlutterDesktopViewGetGraphicsAdapter().

GetNativeViewAccessible()

gfx::NativeViewAccessible flutter::FlutterWindowsView::GetNativeViewAccessible ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 372 of file flutter_windows_view.cc.

                                                                    {
  if (!accessibility_bridge_) {
    return nullptr;
  }
 
  return accessibility_bridge_->GetChildOfAXFragmentRoot();
}

GetWindowHandle()

HWND flutter::FlutterWindowsView::GetWindowHandle ( ) const

virtual

Definition at line 822 of file flutter_windows_view.cc.

                                               {
  return binding_handler_->GetWindowHandle();
}

Referenced by CreateRenderSurface(), FlutterDesktopViewGetHWND(), flutter::FlutterPlatformNodeDelegateWindows::GetBoundsRect(), flutter::FlutterPlatformNodeDelegateWindows::GetTargetForNativeAccessibilityEvent(), InternalFlutterWindows_WindowManager_GetTopLevelWindowHandle(), and ~FlutterWindowsView().

IsImplicitView()

bool flutter::FlutterWindowsView::IsImplicitView

(

)

const

Definition at line 757 of file flutter_windows_view.cc.

                                              {
  return view_id_ == kImplicitViewId;
}

References flutter::kImplicitViewId.

Referenced by SendInitialBounds().

NotifyWinEventWrapper()

void flutter::FlutterWindowsView::NotifyWinEventWrapper ( ui::AXPlatformNodeWin *  node, ax::mojom::Event  event  )

protectedvirtual

Definition at line 840 of file flutter_windows_view.cc.

                                                                   {
  if (node) {
    node->NotifyAccessibilityEvent(event);
  }
}

Referenced by AnnounceAlert().

OnComposeBegin()

void flutter::FlutterWindowsView::OnComposeBegin ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 335 of file flutter_windows_view.cc.

                                        {
  SendComposeBegin();
}

OnComposeChange()

void flutter::FlutterWindowsView::OnComposeChange ( const std::u16string &  text, int  cursor_pos  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 347 of file flutter_windows_view.cc.

                                                         {
  SendComposeChange(text, cursor_pos);
}

References text.

OnComposeCommit()

void flutter::FlutterWindowsView::OnComposeCommit ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 339 of file flutter_windows_view.cc.

                                         {
  SendComposeCommit();
}

OnComposeEnd()

void flutter::FlutterWindowsView::OnComposeEnd ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 343 of file flutter_windows_view.cc.

                                      {
  SendComposeEnd();
}

OnCursorRectUpdated()

void flutter::FlutterWindowsView::OnCursorRectUpdated ( const Rect &  rect )

virtual

Definition at line 380 of file flutter_windows_view.cc.

                                                             {
  binding_handler_->OnCursorRectUpdated(rect);
}

OnDwmCompositionChanged()

void flutter::FlutterWindowsView::OnDwmCompositionChanged

(

)

Definition at line 872 of file flutter_windows_view.cc.

                                                 {
  UpdateVsync(*engine_, surface_.get(), NeedsVsync());
}

OnEmptyFrameGenerated()

bool flutter::FlutterWindowsView::OnEmptyFrameGenerated

(

)

Definition at line 137 of file flutter_windows_view.cc.

                                               {
  // Called on the raster thread.
  std::unique_lock<std::mutex> lock(resize_mutex_);
 
  if (surface_ == nullptr || !surface_->IsValid()) {
    return false;
  }
 
  if (resize_status_ != ResizeState::kResizeStarted) {
    return true;
  }
 
  if (!ResizeRenderSurface(resize_target_height_, resize_target_width_)) {
    return false;
  }
 
  // Platform thread is blocked for the entire duration until the
  // resize_status_ is set to kDone by |OnFramePresented|.
  resize_status_ = ResizeState::kFrameGenerated;
  return true;
}

OnFocus()

void flutter::FlutterWindowsView::OnFocus ( FlutterViewFocusState  focus_state, FlutterViewFocusDirection  direction  )

overridevirtual

Notifies the delegate that the backing window has received or lost focus.

Typically called by currently configured WindowBindingHandler.

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 330 of file flutter_windows_view.cc.

                                                                      {
  SendFocus(focus_state, direction);
}

OnFrameGenerated()

bool flutter::FlutterWindowsView::OnFrameGenerated	(	size_t	width,
		size_t	height
	)

Definition at line 159 of file flutter_windows_view.cc.

                                                                     {
  // Called on the raster thread.
  std::unique_lock<std::mutex> lock(resize_mutex_);
 
  if (IsSizedToContent()) {
    if (!ResizeRenderSurface(width, height)) {
      return false;
    }
 
    sizing_delegate_->DidUpdateViewSize(width, height);
    return true;
  }
 
  if (surface_ == nullptr || !surface_->IsValid()) {
    return false;
  }
 
  if (resize_status_ != ResizeState::kResizeStarted) {
    return true;
  }
 
  if (resize_target_width_ != width || resize_target_height_ != height) {
    return false;
  }
 
  if (!ResizeRenderSurface(resize_target_width_, resize_target_height_)) {
    return false;
  }
 
  // Platform thread is blocked for the entire duration until the
  // resize_status_ is set to kDone by |OnFramePresented|.
  resize_status_ = ResizeState::kFrameGenerated;
  return true;
}

References flutter::FlutterWindowsViewSizingDelegate::DidUpdateViewSize().

Referenced by flutter::CompositorOpenGL::Present(), and flutter::testing::TEST_F().

OnFramePresented()

void flutter::FlutterWindowsView::OnFramePresented ( )

virtual

Definition at line 709 of file flutter_windows_view.cc.

                                          {
  // Called on the engine's raster thread.
  std::unique_lock<std::mutex> lock(resize_mutex_);
 
  switch (resize_status_) {
    case ResizeState::kResizeStarted:
      // The caller must first call |OnFrameGenerated| or
      // |OnEmptyFrameGenerated| before calling this method. This
      // indicates one of the following:
      //
      // 1. The caller did not call these methods.
      // 2. The caller ignored these methods' result.
      // 3. The platform thread started a resize after the caller called these
      //    methods. We might have presented a frame of the wrong size to the
      //    view.
      return;
    case ResizeState::kFrameGenerated: {
      // A frame was generated for a pending resize.
      resize_status_ = ResizeState::kDone;
      // Unblock the platform thread.
      engine_->task_runner()->PostTask([this] {});
 
      lock.unlock();
 
      // Blocking the raster thread until DWM flushes alleviates glitches where
      // previous size surface is stretched over current size view.
      windows_proc_table_->DwmFlush();
    }
    case ResizeState::kDone:
      return;
  }
}

References flutter::TaskRunner::PostTask(), and flutter::FlutterWindowsEngine::task_runner().

Referenced by flutter::CompositorOpenGL::Present().

OnHighContrastChanged()

void flutter::FlutterWindowsView::OnHighContrastChanged ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 818 of file flutter_windows_view.cc.

                                               {
  engine_->UpdateHighContrastMode();
}

References flutter::FlutterWindowsEngine::UpdateHighContrastMode().

OnKey()

void flutter::FlutterWindowsView::OnKey ( int  key, int  scancode, int  action, char32_t  character, bool  extended, bool  was_down, KeyEventCallback  callback  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 320 of file flutter_windows_view.cc.

                                                          {
  SendKey(key, scancode, action, character, extended, was_down, callback);
}

References action, callback, character, extended, key, scancode, and was_down.

OnPointerDown()

void flutter::FlutterWindowsView::OnPointerDown ( double  x, double  y, FlutterPointerDeviceKind  device_kind, int32_t  device_id, FlutterPointerMouseButtons  button  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 266 of file flutter_windows_view.cc.

                                               {
  if (flutter_button != 0) {
    auto state = GetOrCreatePointerState(device_kind, device_id);
    state->buttons |= flutter_button;
    SendPointerDown(x, y, state);
  }
}

OnPointerLeave()

void flutter::FlutterWindowsView::OnPointerLeave ( double  x, double  y, FlutterPointerDeviceKind  device_kind, int32_t  device_id = 0  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 292 of file flutter_windows_view.cc.

                                                           {
  SendPointerLeave(x, y, GetOrCreatePointerState(device_kind, device_id));
}

OnPointerMove()

void flutter::FlutterWindowsView::OnPointerMove ( double  x, double  y, FlutterPointerDeviceKind  device_kind, int32_t  device_id, int  modifiers_state  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 257 of file flutter_windows_view.cc.

                                                            {
  engine_->keyboard_key_handler()->SyncModifiersIfNeeded(modifiers_state);
  SendPointerMove(x, y, GetOrCreatePointerState(device_kind, device_id));
}

References flutter::FlutterWindowsEngine::keyboard_key_handler(), and flutter::KeyboardHandlerBase::SyncModifiersIfNeeded().

OnPointerPanZoomEnd()

void flutter::FlutterWindowsView::OnPointerPanZoomEnd ( int32_t  device_id )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 312 of file flutter_windows_view.cc.

                                                              {
  SendPointerPanZoomEnd(device_id);
}

OnPointerPanZoomStart()

void flutter::FlutterWindowsView::OnPointerPanZoomStart ( int32_t  device_id )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 299 of file flutter_windows_view.cc.

                                                                {
  PointerLocation point = binding_handler_->GetPrimaryPointerLocation();
  SendPointerPanZoomStart(device_id, point.x, point.y);
}

References flutter::PointerLocation::x, and flutter::PointerLocation::y.

OnPointerPanZoomUpdate()

void flutter::FlutterWindowsView::OnPointerPanZoomUpdate ( int32_t  device_id, double  pan_x, double  pan_y, double  scale, double  rotation  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 304 of file flutter_windows_view.cc.

                                                                 {
  SendPointerPanZoomUpdate(device_id, pan_x, pan_y, scale, rotation);
}

OnPointerUp()

void flutter::FlutterWindowsView::OnPointerUp ( double  x, double  y, FlutterPointerDeviceKind  device_kind, int32_t  device_id, FlutterPointerMouseButtons  button  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 279 of file flutter_windows_view.cc.

                                               {
  if (flutter_button != 0) {
    auto state = GetOrCreatePointerState(device_kind, device_id);
    state->buttons &= ~flutter_button;
    SendPointerUp(x, y, state);
  }
}

OnResetImeComposing()

void flutter::FlutterWindowsView::OnResetImeComposing ( )

virtual

Definition at line 384 of file flutter_windows_view.cc.

                                             {
  binding_handler_->OnResetImeComposing();
}

OnScroll()

void flutter::FlutterWindowsView::OnScroll ( double  x, double  y, double  delta_x, double  delta_y, int  scroll_offset_multiplier, FlutterPointerDeviceKind  device_kind, int32_t  device_id  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 352 of file flutter_windows_view.cc.

                                                     {
  SendScroll(x, y, delta_x, delta_y, scroll_offset_multiplier, device_kind,
             device_id);
}

OnScrollInertiaCancel()

void flutter::FlutterWindowsView::OnScrollInertiaCancel ( int32_t  device_id )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 363 of file flutter_windows_view.cc.

                                                                {
  PointerLocation point = binding_handler_->GetPrimaryPointerLocation();
  SendScrollInertiaCancel(device_id, point.x, point.y);
}

References flutter::PointerLocation::x, and flutter::PointerLocation::y.

OnText()

void flutter::FlutterWindowsView::OnText ( const std::u16string &  text )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 316 of file flutter_windows_view.cc.

                                                        {
  SendText(text);
}

References text.

OnUpdateSemanticsEnabled()

void flutter::FlutterWindowsView::OnUpdateSemanticsEnabled ( bool  enabled )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 368 of file flutter_windows_view.cc.

                                                              {
  engine_->UpdateSemanticsEnabled(enabled);
}

References flutter::FlutterWindowsEngine::UpdateSemanticsEnabled().

OnWindowRepaint()

void flutter::FlutterWindowsView::OnWindowRepaint ( )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 253 of file flutter_windows_view.cc.

                                         {
  ForceRedraw();
}

References ForceRedraw().

OnWindowSizeChanged()

bool flutter::FlutterWindowsView::OnWindowSizeChanged ( size_t  width, size_t  height  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 202 of file flutter_windows_view.cc.

                                                                        {
  if (IsSizedToContent()) {
    // No resize synchronization needed for views sized to content.
    return true;
  }
 
  if (!engine_->egl_manager()) {
    SendWindowMetrics(width, height, binding_handler_->GetDpiScale());
    return true;
  }
 
  if (!surface_ || !surface_->IsValid()) {
    SendWindowMetrics(width, height, binding_handler_->GetDpiScale());
    return true;
  }
 
  // We're using OpenGL rendering. Resizing the surface must happen on the
  // raster thread.
  bool surface_will_update =
      SurfaceWillUpdate(surface_->width(), surface_->height(), width, height);
  if (!surface_will_update) {
    SendWindowMetrics(width, height, binding_handler_->GetDpiScale());
    return true;
  }
 
  {
    std::unique_lock<std::mutex> lock(resize_mutex_);
    resize_status_ = ResizeState::kResizeStarted;
    resize_target_width_ = width;
    resize_target_height_ = height;
  }
 
  SendWindowMetrics(width, height, binding_handler_->GetDpiScale());
 
  std::chrono::time_point<std::chrono::steady_clock> start_time =
      std::chrono::steady_clock::now();
 
  while (true) {
    if (std::chrono::steady_clock::now() > start_time + kWindowResizeTimeout) {
      return false;
    }
    std::unique_lock<std::mutex> lock(resize_mutex_);
    if (resize_status_ == ResizeState::kDone) {
      break;
    }
    lock.unlock();
    engine_->task_runner()->PollOnce(kWindowResizeTimeout);
  }
  return true;
}

References flutter::FlutterWindowsEngine::egl_manager(), flutter::TaskRunner::PollOnce(), and flutter::FlutterWindowsEngine::task_runner().

OnWindowStateEvent()

void flutter::FlutterWindowsView::OnWindowStateEvent ( HWND  hwnd, WindowStateEvent  event  )

overridevirtual

Implements flutter::WindowBindingHandlerDelegate.

Definition at line 876 of file flutter_windows_view.cc.

                                                                             {
  engine_->OnWindowStateEvent(hwnd, event);
}

References flutter::FlutterWindowsEngine::OnWindowStateEvent().

PresentSoftwareBitmap()

bool flutter::FlutterWindowsView::PresentSoftwareBitmap ( const void *  allocation, size_t  row_bytes, size_t  height  )

virtual

Definition at line 746 of file flutter_windows_view.cc.

                                                              {
  return binding_handler_->OnBitmapSurfaceUpdated(allocation, row_bytes,
                                                  height);
}

Referenced by flutter::CompositorSoftware::Present().

SendInitialBounds()

void flutter::FlutterWindowsView::SendInitialBounds

(

)

Definition at line 439 of file flutter_windows_view.cc.

                                           {
  // Non-implicit views' initial window metrics are sent when the view is added
  // to the engine.
  if (!IsImplicitView()) {
    return;
  }
 
  engine_->SendWindowMetricsEvent(CreateWindowMetricsEvent());
}

References CreateWindowMetricsEvent(), IsImplicitView(), and flutter::FlutterWindowsEngine::SendWindowMetricsEvent().

surface()

egl::WindowSurface * flutter::FlutterWindowsView::surface

(

)

const

Definition at line 814 of file flutter_windows_view.cc.

                                                    {
  return surface_.get();
}

Referenced by flutter::CompositorOpenGL::Present().

UpdateSemanticsEnabled()

void flutter::FlutterWindowsView::UpdateSemanticsEnabled ( bool  enabled )

virtual

Definition at line 860 of file flutter_windows_view.cc.

                                                            {
  if (semantics_enabled_ != enabled) {
    semantics_enabled_ = enabled;
 
    if (!semantics_enabled_ && accessibility_bridge_) {
      accessibility_bridge_.reset();
    } else if (semantics_enabled_ && !accessibility_bridge_) {
      accessibility_bridge_ = CreateAccessibilityBridge();
    }
  }
}

References CreateAccessibilityBridge().

view_id()

FlutterViewId flutter::FlutterWindowsView::view_id

(

)

const

Definition at line 753 of file flutter_windows_view.cc.

                                                {
  return view_id_;
}

Referenced by flutter::AccessibilityBridgeWindows::DispatchAccessibilityAction(), and flutter::WindowManager::HandleMessage().

Friends And Related Function Documentation

ViewModifier

friend class ViewModifier

friend

Definition at line 275 of file flutter_windows_view.h.

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

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