winrt: Fix dnd with non mouse input device

When using anything but the mouse, there is no release event sent.
Instead one needs to subscribe to the ICorePointerRedirector.

Task-number: QTBUG-58781
Change-Id: I664ba24bd89ea9f513f8f11b385e2f06ece42fd0
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

2 files changed, 25 insertions, 0 deletions

diff --git a/src/plugins/platforms/winrt/qwinrtscreen.cpp b/src/plugins/platforms/winrt/qwinrtscreen.cpp
index 150fc8a25e..edfcf038d7 100644
--- a/src/plugins/platforms/winrt/qwinrtscreen.cpp
+++ b/src/plugins/platforms/winrt/qwinrtscreen.cpp
@@ -91,6 +91,7 @@ typedef ITypedEventHandler<CoreWindow*, PointerEventArgs*> PointerHandler;
 typedef ITypedEventHandler<CoreWindow*, WindowSizeChangedEventArgs*> SizeChangedHandler;
 typedef ITypedEventHandler<CoreWindow*, VisibilityChangedEventArgs*> VisibilityChangedHandler;
 typedef ITypedEventHandler<DisplayInformation*, IInspectable*> DisplayInformationHandler;
+typedef ITypedEventHandler<ICorePointerRedirector*, PointerEventArgs*> RedirectHandler;
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
 typedef ITypedEventHandler<ApplicationView*, IInspectable*> VisibleBoundsChangedHandler;
 #endif // WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
@@ -454,6 +455,8 @@ typedef HRESULT (__stdcall ICoreWindow::*CoreWindowCallbackRemover)(EventRegistr
 uint qHash(CoreWindowCallbackRemover key) { void *ptr = *(void **)(&key); return qHash(ptr); }
 typedef HRESULT (__stdcall IDisplayInformation::*DisplayCallbackRemover)(EventRegistrationToken);
 uint qHash(DisplayCallbackRemover key) { void *ptr = *(void **)(&key); return qHash(ptr); }
+typedef HRESULT (__stdcall ICorePointerRedirector::*RedirectorCallbackRemover)(EventRegistrationToken);
+uint qHash(RedirectorCallbackRemover key) { void *ptr = *(void **)(&key); return qHash(ptr); }
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
 typedef HRESULT (__stdcall IApplicationView2::*ApplicationView2CallbackRemover)(EventRegistrationToken);
 uint qHash(ApplicationView2CallbackRemover key) { void *ptr = *(void **)(&key); return qHash(ptr); }
@@ -464,6 +467,7 @@ class QWinRTScreenPrivate
 public:
     QTouchDevice *touchDevice;
     ComPtr<ICoreWindow> coreWindow;
+    ComPtr<ICorePointerRedirector> redirect;
     ComPtr<Xaml::IDependencyObject> canvas;
     ComPtr<IApplicationView> view;
     ComPtr<IDisplayInformation> displayInformation;
@@ -482,6 +486,7 @@ public:
     QHash<Qt::Key, KeyInfo> activeKeys;
     QHash<CoreWindowCallbackRemover, EventRegistrationToken> windowTokens;
     QHash<DisplayCallbackRemover, EventRegistrationToken> displayTokens;
+    QHash<RedirectorCallbackRemover, EventRegistrationToken> redirectTokens;
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
     QHash<ApplicationView2CallbackRemover, EventRegistrationToken> view2Tokens;
     ComPtr<IApplicationView2> view2;
@@ -513,6 +518,10 @@ QWinRTScreen::QWinRTScreen()
 
     hr = window->get_CoreWindow(&d->coreWindow);
     Q_ASSERT_SUCCEEDED(hr);
+
+    hr = d->coreWindow.As(&d->redirect);
+    Q_ASSERT_SUCCEEDED(hr);
+
     hr = d->coreWindow->Activate();
     Q_ASSERT_SUCCEEDED(hr);
 
@@ -595,6 +604,10 @@ QWinRTScreen::~QWinRTScreen()
             hr = (d->displayInformation.Get()->*i.key())(i.value());
             Q_ASSERT_SUCCEEDED(hr);
         }
+        for (QHash<RedirectorCallbackRemover, EventRegistrationToken>::const_iterator i = d->redirectTokens.begin(); i != d->redirectTokens.end(); ++i) {
+            hr = (d->redirect.Get()->*i.key())(i.value());
+            Q_ASSERT_SUCCEEDED(hr);
+        }
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
         for (QHash<ApplicationView2CallbackRemover, EventRegistrationToken>::const_iterator i = d->view2Tokens.begin(); i != d->view2Tokens.end(); ++i) {
             hr = (d->view2.Get()->*i.key())(i.value());
@@ -754,6 +767,9 @@ void QWinRTScreen::initialize()
     Q_ASSERT_SUCCEEDED(hr);
     onOrientationChanged(Q_NULLPTR, Q_NULLPTR);
     onVisibilityChanged(nullptr, nullptr);
+
+    hr = d->redirect->add_PointerRoutedReleased(Callback<RedirectHandler>(this, &QWinRTScreen::onRedirectReleased).Get(), &d->redirectTokens[&ICorePointerRedirector::remove_PointerRoutedReleased]);
+    Q_ASSERT_SUCCEEDED(hr);
 }
 
 void QWinRTScreen::setCursorRect(const QRectF &cursorRect)
@@ -1378,6 +1394,13 @@ HRESULT QWinRTScreen::onDpiChanged(IDisplayInformation *, IInspectable *)
     return S_OK;
 }
 
+HRESULT QWinRTScreen::onRedirectReleased(ICorePointerRedirector *, IPointerEventArgs *args)
+{
+    // When dragging ends with a non-mouse input device then onRedirectRelease is invoked.
+    // QTBUG-58781
+    return onPointerUpdated(nullptr, args);
+}
+
 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
 HRESULT QWinRTScreen::onWindowSizeChanged(IApplicationView *, IInspectable *)
 #else
diff --git a/src/plugins/platforms/winrt/qwinrtscreen.h b/src/plugins/platforms/winrt/qwinrtscreen.h
index 7dcdb98ead..fd6499c2b9 100644
--- a/src/plugins/platforms/winrt/qwinrtscreen.h
+++ b/src/plugins/platforms/winrt/qwinrtscreen.h
@@ -52,6 +52,7 @@ namespace ABI {
             namespace Core {
                 struct IAutomationProviderRequestedEventArgs;
                 struct ICharacterReceivedEventArgs;
+                struct ICorePointerRedirector;
                 struct ICoreWindow;
                 struct ICoreWindowEventArgs;
                 struct IKeyEventArgs;
@@ -149,6 +150,7 @@ private:
 #else
     HRESULT onWindowSizeChanged(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::IWindowSizeChangedEventArgs *);
 #endif
+    HRESULT onRedirectReleased(ABI::Windows::UI::Core::ICorePointerRedirector *, ABI::Windows::UI::Core::IPointerEventArgs *);
 
     QScopedPointer<QWinRTScreenPrivate> d_ptr;
     QRectF mCursorRect;