Flutter Windows Embedder
flutter::DirectManipulationEventHandler Class Reference

#include <direct_manipulation.h>

Inheritance diagram for flutter::DirectManipulationEventHandler:

Public Member Functions

 DirectManipulationEventHandler (DirectManipulationOwner *owner)
 
STDMETHODIMP QueryInterface (REFIID iid, void **ppv) override
 
ULONG STDMETHODCALLTYPE AddRef () override
 
ULONG STDMETHODCALLTYPE Release () override
 
HRESULT STDMETHODCALLTYPE OnViewportStatusChanged (IDirectManipulationViewport *viewport, DIRECTMANIPULATION_STATUS current, DIRECTMANIPULATION_STATUS previous) override
 
HRESULT STDMETHODCALLTYPE OnViewportUpdated (IDirectManipulationViewport *viewport) override
 
HRESULT STDMETHODCALLTYPE OnContentUpdated (IDirectManipulationViewport *viewport, IDirectManipulationContent *content) override
 
HRESULT STDMETHODCALLTYPE OnInteraction (IDirectManipulationViewport2 *viewport, DIRECTMANIPULATION_INTERACTION_TYPE interaction) override
 

Friends

class DirectManipulationOwner
 

Detailed Description

Definition at line 67 of file direct_manipulation.h.

Constructor & Destructor Documentation

◆ DirectManipulationEventHandler()

flutter::DirectManipulationEventHandler::DirectManipulationEventHandler ( DirectManipulationOwner owner)
inlineexplicit

Definition at line 76 of file direct_manipulation.h.

77  : owner_(owner) {}

Member Function Documentation

◆ AddRef()

ULONG STDMETHODCALLTYPE flutter::DirectManipulationEventHandler::AddRef ( )
override

Definition at line 165 of file direct_manipulation.cc.

165  {
166  RefCountedThreadSafe::AddRef();
167  return 0;
168 }

Referenced by QueryInterface().

◆ OnContentUpdated()

HRESULT flutter::DirectManipulationEventHandler::OnContentUpdated ( IDirectManipulationViewport *  viewport,
IDirectManipulationContent *  content 
)
override

Definition at line 133 of file direct_manipulation.cc.

135  {
136  float transform[6];
137  HRESULT hr = content->GetContentTransform(transform, ARRAYSIZE(transform));
138  if (FAILED(hr)) {
139  FML_LOG(ERROR) << "GetContentTransform failed";
140  return S_OK;
141  }
142  if (!during_synthesized_reset_) {
143  GestureData data = ConvertToGestureData(transform);
144  float scale = data.scale / initial_gesture_data_.scale;
145  float pan_x = data.pan_x - initial_gesture_data_.pan_x;
146  float pan_y = data.pan_y - initial_gesture_data_.pan_y;
147  last_pan_delta_x_ = pan_x - last_pan_x_;
148  last_pan_delta_y_ = pan_y - last_pan_y_;
149  last_pan_x_ = pan_x;
150  last_pan_y_ = pan_y;
151  if (owner_->binding_handler_delegate && !during_inertia_) {
153  GetDeviceId(), pan_x, pan_y, scale, 0);
154  }
155  }
156  return S_OK;
157 }

References flutter::DirectManipulationOwner::binding_handler_delegate, content, and flutter::WindowBindingHandlerDelegate::OnPointerPanZoomUpdate().

◆ OnInteraction()

HRESULT flutter::DirectManipulationEventHandler::OnInteraction ( IDirectManipulationViewport2 *  viewport,
DIRECTMANIPULATION_INTERACTION_TYPE  interaction 
)
override

Definition at line 159 of file direct_manipulation.cc.

161  {
162  return S_OK;
163 }

◆ OnViewportStatusChanged()

HRESULT flutter::DirectManipulationEventHandler::OnViewportStatusChanged ( IDirectManipulationViewport *  viewport,
DIRECTMANIPULATION_STATUS  current,
DIRECTMANIPULATION_STATUS  previous 
)
override

Definition at line 64 of file direct_manipulation.cc.

67  {
68  if (during_synthesized_reset_) {
69  during_synthesized_reset_ = current != DIRECTMANIPULATION_READY;
70  return S_OK;
71  }
72  during_inertia_ = current == DIRECTMANIPULATION_INERTIA;
73  if (current == DIRECTMANIPULATION_RUNNING) {
74  IDirectManipulationContent* content;
75  HRESULT hr = viewport->GetPrimaryContent(IID_PPV_ARGS(&content));
76  if (SUCCEEDED(hr)) {
77  float transform[6];
78  hr = content->GetContentTransform(transform, ARRAYSIZE(transform));
79  if (SUCCEEDED(hr)) {
80  initial_gesture_data_ = ConvertToGestureData(transform);
81  } else {
82  FML_LOG(ERROR) << "GetContentTransform failed";
83  }
84  } else {
85  FML_LOG(ERROR) << "GetPrimaryContent failed";
86  }
87  if (owner_->binding_handler_delegate) {
88  owner_->binding_handler_delegate->OnPointerPanZoomStart(GetDeviceId());
89  }
90  } else if (previous == DIRECTMANIPULATION_RUNNING) {
91  // Reset deltas to ensure only inertia values will be compared later.
92  last_pan_delta_x_ = 0.0;
93  last_pan_delta_y_ = 0.0;
94  if (owner_->binding_handler_delegate) {
95  owner_->binding_handler_delegate->OnPointerPanZoomEnd(GetDeviceId());
96  }
97  } else if (previous == DIRECTMANIPULATION_INERTIA) {
98  if (owner_->binding_handler_delegate &&
99  (std::max)(std::abs(last_pan_delta_x_), std::abs(last_pan_delta_y_)) >
100  0.01) {
101  owner_->binding_handler_delegate->OnScrollInertiaCancel(GetDeviceId());
102  }
103  // Need to reset the content transform to its original position
104  // so that we are ready for the next gesture.
105  // Use during_synthesized_reset_ flag to prevent sending reset also to the
106  // framework.
107  during_synthesized_reset_ = true;
108  last_pan_x_ = 0.0;
109  last_pan_y_ = 0.0;
110  last_pan_delta_x_ = 0.0;
111  last_pan_delta_y_ = 0.0;
112  RECT rect;
113  HRESULT hr = viewport->GetViewportRect(&rect);
114  if (FAILED(hr)) {
115  FML_LOG(ERROR) << "Failed to get the current viewport rect";
116  return E_FAIL;
117  }
118  hr = viewport->ZoomToRect(rect.left, rect.top, rect.right, rect.bottom,
119  false);
120  if (FAILED(hr)) {
121  FML_LOG(ERROR) << "Failed to reset the gesture using ZoomToRect";
122  return E_FAIL;
123  }
124  }
125  return S_OK;
126 }

References flutter::DirectManipulationOwner::binding_handler_delegate, content, flutter::WindowBindingHandlerDelegate::OnPointerPanZoomEnd(), flutter::WindowBindingHandlerDelegate::OnPointerPanZoomStart(), and flutter::WindowBindingHandlerDelegate::OnScrollInertiaCancel().

◆ OnViewportUpdated()

HRESULT flutter::DirectManipulationEventHandler::OnViewportUpdated ( IDirectManipulationViewport *  viewport)
override

Definition at line 128 of file direct_manipulation.cc.

129  {
130  return S_OK;
131 }

◆ QueryInterface()

STDMETHODIMP flutter::DirectManipulationEventHandler::QueryInterface ( REFIID  iid,
void **  ppv 
)
override

Definition at line 33 of file direct_manipulation.cc.

34  {
35  if ((iid == IID_IUnknown) ||
36  (iid == IID_IDirectManipulationViewportEventHandler)) {
37  *ppv = static_cast<IDirectManipulationViewportEventHandler*>(this);
38  AddRef();
39  return S_OK;
40  } else if (iid == IID_IDirectManipulationInteractionEventHandler) {
41  *ppv = static_cast<IDirectManipulationInteractionEventHandler*>(this);
42  AddRef();
43  return S_OK;
44  }
45  return E_NOINTERFACE;
46 }

References AddRef().

◆ Release()

ULONG STDMETHODCALLTYPE flutter::DirectManipulationEventHandler::Release ( )
override

Definition at line 170 of file direct_manipulation.cc.

170  {
171  RefCountedThreadSafe::Release();
172  return 0;
173 }

Friends And Related Function Documentation

◆ DirectManipulationOwner

friend class DirectManipulationOwner
friend

Definition at line 71 of file direct_manipulation.h.


The documentation for this class was generated from the following files:
flutter::WindowBindingHandlerDelegate::OnPointerPanZoomEnd
virtual void OnPointerPanZoomEnd(int32_t device_id)=0
flutter::WindowBindingHandlerDelegate::OnPointerPanZoomUpdate
virtual void OnPointerPanZoomUpdate(int32_t device_id, double pan_x, double pan_y, double scale, double rotation)=0
content
union flutter::testing::@69::KeyboardChange::@0 content
flutter::WindowBindingHandlerDelegate::OnScrollInertiaCancel
virtual void OnScrollInertiaCancel(int32_t device_id)=0
flutter::DirectManipulationOwner::binding_handler_delegate
WindowBindingHandlerDelegate * binding_handler_delegate
Definition: direct_manipulation.h:46
flutter::DirectManipulationEventHandler::AddRef
ULONG STDMETHODCALLTYPE AddRef() override
Definition: direct_manipulation.cc:165
flutter::WindowBindingHandlerDelegate::OnPointerPanZoomStart
virtual void OnPointerPanZoomStart(int32_t device_id)=0