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NullCheck for DragPoint #438

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Merged
merged 1 commit into from
Aug 16, 2023
Merged

NullCheck for DragPoint #438

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2 changes: 2 additions & 0 deletions source/Components/AvalonDock/Controls/LayoutAnchorableFloatingWindowControl.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,8 @@ bool IOverlayWindowHost.HitTestScreen(Point dragPoint)

bool HitTest(Point dragPoint)
{
if (dragPoint == default(Point))
return false;
var detectionRect = new Rect(this.PointToScreenDPIWithoutFlowDirection(new Point()), this.TransformActualSizeToAncestor());
return detectionRect.Contains(dragPoint);
}
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2 changes: 2 additions & 0 deletions source/Components/AvalonDock/Controls/LayoutDocumentFloatingWindowControl.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -224,6 +224,8 @@ bool IOverlayWindowHost.HitTestScreen(Point dragPoint)

bool HitTest(Point dragPoint)
{
if (dragPoint == default(Point))
return false;
var detectionRect = new Rect(this.PointToScreenDPIWithoutFlowDirection(new Point()), this.TransformActualSizeToAncestor());
return detectionRect.Contains(dragPoint);
}
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7 changes: 5 additions & 2 deletions source/Components/AvalonDock/Controls/TransformExtentions.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
/************************************************************************
/************************************************************************
AvalonDock

Copyright (C) 2007-2013 Xceed Software Inc.
Expand Down Expand Up @@ -59,7 +59,10 @@ public static Rect GetScreenArea(this FrameworkElement element)

public static Point TransformToDeviceDPI(this Visual visual, Point pt)
{
Matrix m = PresentationSource.FromVisual(visual).CompositionTarget.TransformToDevice;
var compositionTarget = PresentationSource.FromVisual(visual).CompositionTarget;
if (compositionTarget == null)
return default;
Matrix m = compositionTarget.TransformToDevice;
return new Point(pt.X / m.M11, pt.Y / m.M22);
}

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