private void ProcessMouseEvents(RawMouseEventArgs e)
{
if (!_initialInputModifiers.HasValue)
{
_initialInputModifiers = e.InputModifiers & MOUSE_INPUTMODIFIERS;
}
void CheckDraggingAccepted(InputModifiers changedMouseButton)
{
if (_initialInputModifiers.Value.HasFlag(changedMouseButton))
{
var result = RaiseEventAndUpdateCursor(RawDragEventType.Drop, e.Root, e.Position, e.InputModifiers);
UpdateCursor(null, DragDropEffects.None);
_result.OnNext(result);
}
else
{
CancelDragging();
}
e.Handled = true;
}
switch (e.Type)
{
case RawMouseEventType.LeftButtonDown:
case RawMouseEventType.RightButtonDown:
case RawMouseEventType.MiddleButtonDown:
case RawMouseEventType.NonClientLeftButtonDown:
CancelDragging();
e.Handled = true;
return;
case RawMouseEventType.LeaveWindow:
RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, e.Root, e.Position, e.InputModifiers); break;
case RawMouseEventType.LeftButtonUp:
CheckDraggingAccepted(InputModifiers.LeftMouseButton); break;
case RawMouseEventType.MiddleButtonUp:
CheckDraggingAccepted(InputModifiers.MiddleMouseButton); break;
case RawMouseEventType.RightButtonUp:
CheckDraggingAccepted(InputModifiers.RightMouseButton); break;
case RawMouseEventType.Move:
var mods = e.InputModifiers & MOUSE_INPUTMODIFIERS;
if (_initialInputModifiers.Value != mods)
{
CancelDragging();
e.Handled = true;
return;
}
if (e.Root != _lastRoot)
{
if (_lastRoot != null)
{
RaiseEventAndUpdateCursor(RawDragEventType.DragLeave, _lastRoot, _lastRoot.PointToClient(e.Root.PointToScreen(e.Position)), e.InputModifiers);
}
RaiseEventAndUpdateCursor(RawDragEventType.DragEnter, e.Root, e.Position, e.InputModifiers);
}
else
{
RaiseEventAndUpdateCursor(RawDragEventType.DragOver, e.Root, e.Position, e.InputModifiers);
}
break;
}
}
private bool ProcessRawMouseEvent(RawMouseEventArgs input)
{
MouseEventArgs e = null;
switch (input.Type)
{
case RawMouseEventType.Move:
e = new MouseEventArgs(this, input.Timestamp);
e.RoutedEvent = UIElement.MouseMoveEvent;
break;
case RawMouseEventType.LeftButtonDown:
e = new MouseButtonEventArgs(this, input.Timestamp);
e.RoutedEvent = UIElement.MouseLeftButtonDownEvent;
break;
case RawMouseEventType.LeftButtonUp:
e = new MouseButtonEventArgs(this, input.Timestamp);
e.RoutedEvent = UIElement.MouseLeftButtonUpEvent;
break;
}
if (e != null)
{
InputManager.Current.ProcessInput(e);
return true;
}
else
{
return false;
}
}