winrt: Refactor platform plugin for XAML support

By using XAML as the platform compositor, many benefits are possible:
 - Better input context handling for tablets
 - Better multiple window support (including non-fullscreen windows)
 - Support for transparent windows and window opacity
 - Integration with native platform controls
 - Simpler orientation handling on Windows Phone with built-in transitions

This patch applies only the minimal parts to make XAML mode work just as
the raw D3D mode. It does this by:
 - Moving all OpenGL parts into QWinRTEGLContext. This will allow us to
   have non-OpenGL windows later (e.g. Direct2D raster surfaces).
 - Moving more window-specific parts into QWinRTWindow. Each window creates
   a SwapChainPanel which can then be used for ANGLE (or Direct2D) content.
 - Moving non screen-specific parts into QWinRTIntegration.
 - Having QWinRTScreen create the base XAML element Canvas.
 - Running certain calls on the UI thread where necessary.

The following code parts were removed:
 - The UIAutomationCore code in QWinRTInputContext, as this is incompatible
   with XAML automation.
 - The D3D Trim and device blacklist, as these have been fixed in ANGLE.
 - Core dispatcher processing in QEventDispatcherWinRT. Now there is only
   one native event dispatcher; it is always running and never needs to be
   pumped.

Future commits should address:
 - Maintaining the window stack list and visibility using the XAML Canvas.
 - Allowing for windows (e.g. popups) to be sized and positioned instead
   of fullscreen.
 - Using the XAML automation API to improve the platform input context.

[ChangeLog][QPA][winrt] Windows Store apps are now composited inside a
XAML container, allowing for tighter integration with the native UI layer.

Change-Id: I285c6dea657c5dab2fda2b1bd8e8e5dd15882c72
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>

1 files changed, 8 insertions, 25 deletions

diff --git a/src/plugins/platforms/winrt/qwinrtscreen.h b/src/plugins/platforms/winrt/qwinrtscreen.h
index d34ce75748..796e6abb80 100644
--- a/src/plugins/platforms/winrt/qwinrtscreen.h
+++ b/src/plugins/platforms/winrt/qwinrtscreen.h
@@ -40,8 +40,6 @@
 #include <qpa/qplatformscreen.h>
 #include <qpa/qwindowsysteminterface.h>
 
-#include <EGL/egl.h>
-
 namespace ABI {
     namespace Windows {
         namespace ApplicationModel {
@@ -59,21 +57,16 @@ namespace ABI {
                 struct IWindowActivatedEventArgs;
                 struct IWindowSizeChangedEventArgs;
             }
+            namespace Xaml {
+                struct IDependencyObject;
+                struct IWindow;
+            }
         }
         namespace Graphics {
             namespace Display {
                 struct IDisplayInformation;
             }
         }
-#ifdef Q_OS_WINPHONE
-        namespace Phone {
-            namespace UI {
-                namespace Input {
-                    struct IBackPressedEventArgs;
-                }
-            }
-        }
-#endif
     }
 }
 struct IInspectable;
@@ -81,23 +74,20 @@ struct IInspectable;
 QT_BEGIN_NAMESPACE
 
 class QTouchDevice;
-class QWinRTEGLContext;
 class QWinRTCursor;
 class QWinRTInputContext;
 class QWinRTScreenPrivate;
 class QWinRTScreen : public QPlatformScreen
 {
 public:
-    explicit QWinRTScreen();
+    explicit QWinRTScreen(ABI::Windows::UI::Xaml::IWindow *xamlWindow);
     ~QWinRTScreen();
     QRect geometry() const;
     int depth() const;
     QImage::Format format() const;
-    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;
 
@@ -110,10 +100,10 @@ public:
     void raise(QWindow *window);
     void lower(QWindow *window);
 
+    void updateWindowTitle();
+
     ABI::Windows::UI::Core::ICoreWindow *coreWindow() const;
-    EGLDisplay eglDisplay() const; // To opengl context
-    EGLSurface eglSurface() const; // To window
-    EGLConfig eglConfig() const;
+    ABI::Windows::UI::Xaml::IDependencyObject *canvas() const;
 
 private:
     void handleExpose();
@@ -127,20 +117,13 @@ private:
     HRESULT onSizeChanged(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::IWindowSizeChangedEventArgs *);
 
     HRESULT onActivated(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::IWindowActivatedEventArgs *);
-    HRESULT onSuspended(IInspectable *, ABI::Windows::ApplicationModel::ISuspendingEventArgs *);
-    HRESULT onResume(IInspectable *, IInspectable *);
 
     HRESULT onClosed(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::ICoreWindowEventArgs *);
     HRESULT onVisibilityChanged(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::IVisibilityChangedEventArgs *);
-    HRESULT onAutomationProviderRequested(ABI::Windows::UI::Core::ICoreWindow *, ABI::Windows::UI::Core::IAutomationProviderRequestedEventArgs *);
 
     HRESULT onOrientationChanged(ABI::Windows::Graphics::Display::IDisplayInformation *, IInspectable *);
     HRESULT onDpiChanged(ABI::Windows::Graphics::Display::IDisplayInformation *, IInspectable *);
 
-#ifdef Q_OS_WINPHONE
-    HRESULT onBackButtonPressed(IInspectable *, ABI::Windows::Phone::UI::Input::IBackPressedEventArgs *args);
-#endif
-
     QScopedPointer<QWinRTScreenPrivate> d_ptr;
     Q_DECLARE_PRIVATE(QWinRTScreen)
 };