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Try to detect when the Visual isn't bound to a PresentationSource #115

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Try to detect when the Visual isn't bound to a PresentationSource #115

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15 changes: 14 additions & 1 deletion Src/ToastNotifications/Position/ControlPositionProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,8 +36,21 @@ public Point GetPosition(double actualPopupWidth, double actualPopupHeight)
if (source?.CompositionTarget == null)
return new Point(0, 0);

var elementSource = PresentationSource.FromVisual(_element);
if (elementSource == null)
return new Point(0, 0);

Matrix transform = source.CompositionTarget.TransformFromDevice;
Point location = transform.Transform(_element.PointToScreen(new Point(0, 0)));
Point location;

try
{
location = transform.Transform(_element.PointToScreen(new Point(0, 0)));
}
catch (InvalidOperationException)
{
return new Point(0, 0);
}

switch (_corner)
{
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