private void ShowOverlayWindow()
{
_overlayWindow = OverlayWindow.Show(DockControl);
SetStartMousePosition(_overlayWindow, _overlayWindow.PointFromScreen(_startMousePoint));
foreach (FloatingWindow floatingWindow in DockControl.FloatingWindows)
{
if (!floatingWindow.IsVisible)
{
continue;
}
NativeFloatingWindow nativeWindow = NativeFloatingWindow.GetNativeFloatingWindow(floatingWindow);
if (nativeWindow == null)
{
continue;
}
Point pointFromScreen = _startMousePoint;
try
{
pointFromScreen = nativeWindow.PointFromScreen(_startMousePoint);
}
catch (Exception e)
{
Debug.WriteLine(@"pointFromScreen: " + pointFromScreen);
Debug.WriteLine(e);
}
SetStartMousePosition(nativeWindow, pointFromScreen);
}
}
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 ShowOverlayWindow()
{
_overlayWindow = OverlayWindow.Show(DockControl);
SetStartMousePosition(_overlayWindow, _overlayWindow.PointFromScreen(_startMousePoint));
foreach (FloatingWindow floatingWindow in DockControl.FloatingWindows)
{
NativeFloatingWindow nativeWindow = NativeFloatingWindow.GetNativeFloatingWindow(floatingWindow);
SetStartMousePosition(nativeWindow, nativeWindow.PointFromScreen(_startMousePoint));
}
}
private void OnFloatingWindowsChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
FloatingWindow floatingWindow = (FloatingWindow)e.NewItems[0];
NativeFloatingWindow.SetNativeFloatingWindow(floatingWindow, new NativeFloatingWindow(floatingWindow));
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
FloatingWindow floatingWindow = (FloatingWindow)e.OldItems[0];
NativeFloatingWindow.SetNativeFloatingWindow(floatingWindow, null);
}
}
internal static void SetNativeFloatingWindow(FloatingWindow floatingWindow, NativeFloatingWindow value)
{
NativeFloatingWindow oldValue = GetNativeFloatingWindow(floatingWindow);
if (oldValue != null)
{
oldValue.DataContext = null; // this should fix "Cannot set Visibility or call Show or ShowDialog after window has closed." exception
oldValue.Close();
}
if (value == null)
{
floatingWindow.ClearValue(NativeFloatingWindowProperty);
}
else
{
floatingWindow.SetValue(NativeFloatingWindowProperty, value);
}
}
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;
}
}
}