PointerPointUpdateKind + KeyModifiers

[kekekeks]

Continue moving towards UWP-style API

[wieslawsoltes]

@kekekeks While testing this PR exception is thrown:

System.ArgumentException
  HResult=0x80070057
  Message=The argument type, 'Avalonia.Input.InputModifiers', is not the same as the enum type 'Avalonia.Input.RawInputModifiers'.
  Source=System.Private.CoreLib
  StackTrace:
   at System.Enum.HasFlag(Enum flag)
   at Avalonia.Platform.InProcessDragSource.<ProcessMouseEvents>g__CheckDraggingAccepted|20_0(InputModifiers changedMouseButton, <>c__DisplayClass20_0& )
   at Avalonia.Platform.InProcessDragSource.ProcessMouseEvents(RawPointerEventArgs e)
   at System.Reactive.AnonymousSafeObserver`1.OnNext(T value) in D:\a\1\s\Rx.NET\Source\src\System.Reactive\AnonymousSafeObserver.cs:line 46
   at System.Reactive.Observer`1.OnNext(T value) in D:\a\1\s\Rx.NET\Source\src\System.Reactive\Internal\Observers.cs:line 80
   at Avalonia.Input.InputManager.ProcessInput(RawInputEventArgs e)
   at Avalonia.Win32.WindowImpl.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
   at Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG& lpmsg)
   at Avalonia.Win32.Win32Platform.RunLoop(CancellationToken cancellationToken)
   at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken)
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[] args)
   at AvaloniaDemo.Program.Main(String[] args) in C:\DOWNLOADS\GitHub\Dock\samples\AvaloniaDemo\Program.cs:line 12

[wieslawsoltes]

@kekekeks Seems to be fixed now.

It would be great to have some sample code showing how to use pointer properties in breaking changes. I had hard time figuring out the pointer properties.

Is this correct use:

wieslawsoltes/Dock@64d4a83

[kekekeks]

some sample code showing how to use pointer properties

I'm just following the UWP API

The code should work, but it's probably better to use PointerUpdateKind in your case. There is another problem in the drag behavior: it assumes that there is only one pointer, which is no longer the case. For now I'd recommend to check for the pointer type, since our drag-n-drop code doesn't work with touch pointers anyway.