winrt: set correct virtual keyboard size

This is done by multiplying by the DIP scale factor.

Task-number: QTBUG-44152
Change-Id: I587a66f1a2f7fa3a713c279f5d877e6acb844620
Reviewed-by: Andrew Knight <qt@panimo.net>

src/plugins/platforms/winrt/qwinrtinputcontext.cpp

@@ -32,6 +32,7 @@
 ****************************************************************************/
 
 #include "qwinrtinputcontext.h"
+#include "qwinrtscreen.h"
 #include <QtGui/QWindow>
 
 #include <wrl.h>
@@ -61,8 +62,8 @@ QT_BEGIN_NAMESPACE
     Windows Phone, however, supports direct hiding/showing of the keyboard.
 */
 
-QWinRTInputContext::QWinRTInputContext(ICoreWindow *window)
-    : m_window(window)
+QWinRTInputContext::QWinRTInputContext(QWinRTScreen *screen)
+    : m_screen(screen)
 {
     IInputPaneStatics *statics;
     if (FAILED(GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_UI_ViewManagement_InputPane).Get(),
@@ -81,9 +82,7 @@ QWinRTInputContext::QWinRTInputContext(ICoreWindow *window)
         inputPane->add_Hiding(Callback<InputPaneVisibilityHandler>(
                                   this, &QWinRTInputContext::onHiding).Get(), &hideToken);
 
-        Rect rect;
-        inputPane->get_OccludedRect(&rect);
-        m_keyboardRect = QRectF(rect.X, rect.Y, rect.Width, rect.Height);
+        handleVisibilityChange(inputPane);
         m_isInputPanelVisible = !m_keyboardRect.isEmpty();
     } else {
         qWarning(Q_FUNC_INFO ": failed to retrieve InputPane.");
@@ -104,33 +103,27 @@ HRESULT QWinRTInputContext::onShowing(IInputPane *pane, IInputPaneVisibilityEven
 {
     m_isInputPanelVisible = true;
     emitInputPanelVisibleChanged();
-
-    Rect rect;
-    pane->get_OccludedRect(&rect);
-    setKeyboardRect(QRectF(rect.X, rect.Y, rect.Width, rect.Height));
-
-    return S_OK;
+    return handleVisibilityChange(pane);
 }
 
 HRESULT QWinRTInputContext::onHiding(IInputPane *pane, IInputPaneVisibilityEventArgs *)
 {
     m_isInputPanelVisible = false;
     emitInputPanelVisibleChanged();
-
-    Rect rect;
-    pane->get_OccludedRect(&rect);
-    setKeyboardRect(QRectF(rect.X, rect.Y, rect.Width, rect.Height));
-
-    return S_OK;
+    return handleVisibilityChange(pane);
 }
 
-void QWinRTInputContext::setKeyboardRect(const QRectF rect)
+HRESULT QWinRTInputContext::handleVisibilityChange(IInputPane *pane)
 {
-    if (m_keyboardRect == rect)
-        return;
-
-    m_keyboardRect = rect;
-    emitKeyboardRectChanged();
+    Rect rect;
+    pane->get_OccludedRect(&rect);
+    const QRectF keyboardRect = QRectF(qRound(rect.X * m_screen->scaleFactor()), qRound(rect.Y * m_screen->scaleFactor()),
+                                       qRound(rect.Width * m_screen->scaleFactor()), qRound(rect.Height * m_screen->scaleFactor()));
+    if (m_keyboardRect != keyboardRect) {
+        m_keyboardRect = keyboardRect;
+        emitKeyboardRectChanged();
+    }
+    return S_OK;
 }
 
 #ifdef Q_OS_WINPHONE
@@ -234,7 +227,7 @@ HRESULT QWinRTInputContext::GetPropertyValue(PROPERTYID idProp, VARIANT *retVal)
         break;
     case 30020: //UIA_NativeWindowHandlePropertyId
         retVal->vt = VT_PTR;
-        retVal->punkVal = m_window;
+        retVal->punkVal = m_screen->coreWindow();
         break;
     }
     return S_OK;
@@ -244,7 +237,7 @@ HRESULT QWinRTInputContext::get_HostRawElementProvider(IRawElementProviderSimple
 {
     // Return the window's element provider
     IInspectable *hostProvider;
-    HRESULT hr = m_window->get_AutomationHostProvider(&hostProvider);
+    HRESULT hr = m_screen->coreWindow()->get_AutomationHostProvider(&hostProvider);
     if (SUCCEEDED(hr)) {
         hr = hostProvider->QueryInterface(IID_PPV_ARGS(retVal));
         hostProvider->Release();

src/plugins/platforms/winrt/qwinrtinputcontext.h

@@ -58,6 +58,7 @@ namespace ABI {
 
 QT_BEGIN_NAMESPACE
 
+class QWinRTScreen;
 class QWinRTInputContext : public QPlatformInputContext
 #ifndef Q_OS_WINPHONE
                          , public Microsoft::WRL::RuntimeClass<
@@ -66,7 +67,7 @@ class QWinRTInputContext : public QPlatformInputContext
 #endif // !Q_OS_WINPHONE
 {
 public:
-    explicit QWinRTInputContext(ABI::Windows::UI::Core::ICoreWindow *window);
+    explicit QWinRTInputContext(QWinRTScreen *);
 
     QRectF keyboardRect() const;
 
@@ -101,9 +102,10 @@ private:
                       ABI::Windows::UI::ViewManagement::IInputPaneVisibilityEventArgs *);
     HRESULT onHiding(ABI::Windows::UI::ViewManagement::IInputPane *,
                      ABI::Windows::UI::ViewManagement::IInputPaneVisibilityEventArgs *);
-    void setKeyboardRect(const QRectF rect);
 
-    ABI::Windows::UI::Core::ICoreWindow *m_window;
+    HRESULT handleVisibilityChange(ABI::Windows::UI::ViewManagement::IInputPane *);
+
+    QWinRTScreen *m_screen;
     QRectF m_keyboardRect;
     bool m_isInputPanelVisible;
 };

src/plugins/platforms/winrt/qwinrtscreen.cpp

@@ -497,9 +497,9 @@ QWinRTScreen::QWinRTScreen()
     Q_ASSERT_SUCCEEDED(hr);
 
 #ifdef Q_OS_WINPHONE
-    d->inputContext.reset(new QWinRTInputContext(d->coreWindow.Get()));
+    d->inputContext.reset(new QWinRTInputContext(this));
 #else
-    d->inputContext = Make<QWinRTInputContext>(d->coreWindow.Get());
+    d->inputContext = Make<QWinRTInputContext>(this);
 #endif
 
     Rect rect;
@@ -680,6 +680,12 @@ QDpi QWinRTScreen::logicalDpi() const
     return QDpi(d->logicalDpi, d->logicalDpi);
 }
 
+qreal QWinRTScreen::scaleFactor() const
+{
+    Q_D(const QWinRTScreen);
+    return d->scaleFactor;
+}
+
 QWinRTInputContext *QWinRTScreen::inputContext() const
 {
     Q_D(const QWinRTScreen);

src/plugins/platforms/winrt/qwinrtscreen.h

@@ -93,6 +93,7 @@ public:
     QSurfaceFormat surfaceFormat() const;
     QSizeF physicalSize() const Q_DECL_OVERRIDE;
     QDpi logicalDpi() const Q_DECL_OVERRIDE;
+    qreal scaleFactor() const;
     QWinRTInputContext *inputContext() const;
     QPlatformCursor *cursor() const;
     Qt::KeyboardModifiers keyboardModifiers() const;