flutter::FlutterPlatformNodeDelegateWindows Class Reference

#include <flutter_platform_node_delegate_windows.h>

Inheritance diagram for flutter::FlutterPlatformNodeDelegateWindows:

Public Member Functions
	FlutterPlatformNodeDelegateWindows (std::weak_ptr< AccessibilityBridge > bridge, FlutterWindowsView *view)
virtual	~FlutterPlatformNodeDelegateWindows ()
void	Init (std::weak_ptr< OwnerBridge > bridge, ui::AXNode *node) override
	Called only once, immediately after construction. The constructor doesn't take any arguments because in the Windows subclass we use a special function to construct a COM object. Subclasses must call super. More...
gfx::NativeViewAccessible	GetNativeViewAccessible () override
gfx::NativeViewAccessible	HitTestSync (int screen_physical_pixel_x, int screen_physical_pixel_y) const override
gfx::Rect	GetBoundsRect (const ui::AXCoordinateSystem coordinate_system, const ui::AXClippingBehavior clipping_behavior, ui::AXOffscreenResult *offscreen_result) const override
virtual void	DispatchWinAccessibilityEvent (ax::mojom::Event event_type)
void	SetFocus ()
gfx::AcceleratedWidget	GetTargetForNativeAccessibilityEvent () override
ui::AXPlatformNode *	GetPlatformNode () const override
Public Member Functions inherited from flutter::FlutterPlatformNodeDelegate
	FlutterPlatformNodeDelegate ()
virtual	~FlutterPlatformNodeDelegate () override
const ui::AXUniqueId &	GetUniqueId () const override
const ui::AXNodeData &	GetData () const override
bool	AccessibilityPerformAction (const ui::AXActionData &data) override
gfx::NativeViewAccessible	GetParent () override
gfx::NativeViewAccessible	GetFocus () override
int	GetChildCount () const override
gfx::NativeViewAccessible	ChildAtIndex (int index) override
gfx::Rect	GetBoundsRect (const ui::AXCoordinateSystem coordinate_system, const ui::AXClippingBehavior clipping_behavior, ui::AXOffscreenResult *offscreen_result) const override
gfx::NativeViewAccessible	GetLowestPlatformAncestor () const override
ui::AXNodePosition::AXPositionInstance	CreateTextPositionAt (int offset) const override
virtual void	NodeDataChanged (const ui::AXNodeData &old_node_data, const ui::AXNodeData &new_node_data)
ui::AXNode *	GetAXNode () const
	Gets the underlying ax node for this platform node delegate. More...
std::weak_ptr< OwnerBridge >	GetOwnerBridge () const
	Gets the owner of this platform node delegate. This is useful when you want to get the information about surrounding nodes of this platform node delegate, e.g. the global rect of this platform node delegate. This pointer is only safe in the platform thread. More...
virtual ui::AXPlatformNode *	GetFromNodeID (int32_t id) override
virtual ui::AXPlatformNode *	GetFromTreeIDAndNodeID (const ui::AXTreeID &tree_id, int32_t node_id) override
virtual const ui::AXTree::Selection	GetUnignoredSelection () const override

Detailed Description

Definition at line 20 of file flutter_platform_node_delegate_windows.h.

Constructor & Destructor Documentation

FlutterPlatformNodeDelegateWindows()

flutter::FlutterPlatformNodeDelegateWindows::FlutterPlatformNodeDelegateWindows	(	std::weak_ptr< AccessibilityBridge >	bridge,
		FlutterWindowsView *	view
	)

Definition at line 18 of file flutter_platform_node_delegate_windows.cc.

    : bridge_(bridge), view_(view) {
  FML_DCHECK(!bridge_.expired())
      << "Expired AccessibilityBridge passed to node delegate";
  FML_DCHECK(view_);
}

~FlutterPlatformNodeDelegateWindows()

flutter::FlutterPlatformNodeDelegateWindows::~FlutterPlatformNodeDelegateWindows ( )

virtual

Definition at line 27 of file flutter_platform_node_delegate_windows.cc.

                                                                        {
  if (ax_platform_node_) {
    ax_platform_node_->Destroy();
  }
}

Member Function Documentation

DispatchWinAccessibilityEvent()

void flutter::FlutterPlatformNodeDelegateWindows::DispatchWinAccessibilityEvent ( ax::mojom::Event  event_type )

virtual

Definition at line 96 of file flutter_platform_node_delegate_windows.cc.

                             {
  ax_platform_node_->NotifyAccessibilityEvent(event_type);
}

References event_type.

GetBoundsRect()

gfx::Rect flutter::FlutterPlatformNodeDelegateWindows::GetBoundsRect ( const ui::AXCoordinateSystem  coordinate_system, const ui::AXClippingBehavior  clipping_behavior, ui::AXOffscreenResult *  offscreen_result  ) const

override

Definition at line 82 of file flutter_platform_node_delegate_windows.cc.

                                                 {
  gfx::Rect bounds = FlutterPlatformNodeDelegate::GetBoundsRect(
      coordinate_system, clipping_behavior, offscreen_result);
  POINT origin{bounds.x(), bounds.y()};
  POINT extent{bounds.x() + bounds.width(), bounds.y() + bounds.height()};
  ClientToScreen(view_->GetWindowHandle(), &origin);
  ClientToScreen(view_->GetWindowHandle(), &extent);
  return gfx::Rect(origin.x, origin.y, extent.x - origin.x,
                   extent.y - origin.y);
}

References flutter::FlutterPlatformNodeDelegate::GetBoundsRect(), and flutter::FlutterWindowsView::GetWindowHandle().

Referenced by HitTestSync().

GetNativeViewAccessible()

gfx::NativeViewAccessible flutter::FlutterPlatformNodeDelegateWindows::GetNativeViewAccessible ( )

override

Definition at line 43 of file flutter_platform_node_delegate_windows.cc.

                                                            {
  FML_DCHECK(ax_platform_node_) << "AXPlatformNode hasn't been created";
  return ax_platform_node_->GetNativeViewAccessible();
}

Referenced by SetFocus().

GetPlatformNode()

ui::AXPlatformNode * flutter::FlutterPlatformNodeDelegateWindows::GetPlatformNode ( ) const

overridevirtual

Reimplemented from flutter::FlutterPlatformNodeDelegate.

Definition at line 113 of file flutter_platform_node_delegate_windows.cc.

          {
  return ax_platform_node_;
}

GetTargetForNativeAccessibilityEvent()

gfx::AcceleratedWidget flutter::FlutterPlatformNodeDelegateWindows::GetTargetForNativeAccessibilityEvent ( )

override

Definition at line 109 of file flutter_platform_node_delegate_windows.cc.

                                                                         {
  return view_->GetWindowHandle();
}

References flutter::FlutterWindowsView::GetWindowHandle().

HitTestSync()

gfx::NativeViewAccessible flutter::FlutterPlatformNodeDelegateWindows::HitTestSync ( int  screen_physical_pixel_x, int  screen_physical_pixel_y  ) const

override

Definition at line 49 of file flutter_platform_node_delegate_windows.cc.

                                       {
  // If this node doesn't contain the point, return.
  ui::AXOffscreenResult result;
  gfx::Rect rect = GetBoundsRect(ui::AXCoordinateSystem::kScreenPhysicalPixels,
                                 ui::AXClippingBehavior::kUnclipped, &result);
  gfx::Point screen_point(screen_physical_pixel_x, screen_physical_pixel_y);
  if (!rect.Contains(screen_point)) {
    return nullptr;
  }
 
  // If any child in this node's subtree contains the point, return that child.
  auto bridge = bridge_.lock();
  FML_DCHECK(bridge);
  for (const ui::AXNode* child : GetAXNode()->children()) {
    std::shared_ptr<FlutterPlatformNodeDelegateWindows> win_delegate =
        std::static_pointer_cast<FlutterPlatformNodeDelegateWindows>(
            bridge->GetFlutterPlatformNodeDelegateFromID(child->id()).lock());
    FML_DCHECK(win_delegate)
        << "No FlutterPlatformNodeDelegate found for node " << child->id();
    auto hit_view = win_delegate->HitTestSync(screen_physical_pixel_x,
                                              screen_physical_pixel_y);
    if (hit_view) {
      return hit_view;
    }
  }
 
  // If no children contain the point, but this node does, return this node.
  return ax_platform_node_->GetNativeViewAccessible();
}

References flutter::FlutterPlatformNodeDelegate::GetAXNode(), and GetBoundsRect().

Init()

void flutter::FlutterPlatformNodeDelegateWindows::Init ( std::weak_ptr< OwnerBridge >  bridge, ui::AXNode *  node  )

overridevirtual

Called only once, immediately after construction. The constructor doesn't take any arguments because in the Windows subclass we use a special function to construct a COM object. Subclasses must call super.

Reimplemented from flutter::FlutterPlatformNodeDelegate.

Definition at line 34 of file flutter_platform_node_delegate_windows.cc.

                                                              {
  FlutterPlatformNodeDelegate::Init(bridge, node);
  ax_platform_node_ = ui::AXPlatformNode::Create(this);
  FML_DCHECK(ax_platform_node_) << "Failed to create AXPlatformNode";
}

References flutter::FlutterPlatformNodeDelegate::Init().

SetFocus()

void flutter::FlutterPlatformNodeDelegateWindows::SetFocus

(

)

Definition at line 101 of file flutter_platform_node_delegate_windows.cc.

                                                  {
  VARIANT varchild{};
  varchild.vt = VT_I4;
  varchild.lVal = CHILDID_SELF;
  GetNativeViewAccessible()->accSelect(SELFLAG_TAKEFOCUS, varchild);
}

References GetNativeViewAccessible().

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

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