private DockPane PaneAtPointNativeFloatingWindows(IDragSource source, double deltaX, double deltaY, out bool stopHitTest)
{
stopHitTest = false;
FloatingWindowCollection floatingWindows = DockControl.FloatingWindows;
Point pt = GetStartMousePosition(_overlayWindow);
pt.Offset(deltaX, deltaY);
for (int i = floatingWindows.Count - 1; i >= 0; i--)
{
FloatingWindow floatingWindow = floatingWindows[i];
if (!floatingWindow.IsVisible)
{
continue;
}
NativeFloatingWindow nativeWindow = NativeFloatingWindow.GetNativeFloatingWindow(floatingWindow);
Rect windowBounds = nativeWindow.GetPreviewBounds(_overlayWindow);
stopHitTest = windowBounds.Contains(pt);
if (stopHitTest)
{
pt = GetStartMousePosition(nativeWindow);
pt.Offset(deltaX, deltaY);
var result = PaneFromHitTestResult(source, VisualTreeHelper.HitTest(nativeWindow, pt));
if (result == null || !source.CanDrop(result))
{
stopHitTest = false;
continue;
}
return(result);
}
}
return(null);
}
private void TargetAtPointNativeWindows(double deltaX, double deltaY)
{
Point pt = GetStartMousePosition(_overlayWindow);
pt.Offset(deltaX, deltaY);
VisualTreeHelper.HitTest(_overlayWindow, null,
new HitTestResultCallback(TargetAtPointHitTestResultCallback),
new PointHitTestParameters(pt));
if (_targetAtPoint.HasValue)
{
return;
}
FloatingWindowCollection floatingWindows = DockControl.FloatingWindows;
for (int i = floatingWindows.Count - 1; i >= 0; i--)
{
FloatingWindow floatingWindow = floatingWindows[i];
if (!floatingWindow.IsVisible)
{
continue;
}
NativeFloatingWindow nativeWindow = NativeFloatingWindow.GetNativeFloatingWindow(floatingWindow);
if (nativeWindow == null)
{
continue;
}
Rect windowBounds = nativeWindow.GetPreviewBounds(_overlayWindow);
if (windowBounds.Contains(pt))
{
pt = GetStartMousePosition(nativeWindow);
pt.Offset(deltaX, deltaY);
_targetAtPoint = TargetFromHitTestResult(VisualTreeHelper.HitTest(nativeWindow, pt));
if (!_targetAtPoint.HasValue)
{
_targetAtPoint = Target.Empty;
}
return;
}
}
}