semi working docking, but zooming is now broken.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/DocumentDecorations.tsx b/src/DocumentDecorations.tsx
index 7899db9c9..d5a682b82 100644
--- a/src/DocumentDecorations.tsx
+++ b/src/DocumentDecorations.tsx
@@ -24,7 +24,10 @@ export class DocumentDecorations extends React.Component {
         return SelectionManager.SelectedDocuments().reduce((bounds, element) => {
             var spt = element.TransformToScreenPoint(0, 0);
             var bpt = element.TransformToScreenPoint(element.width, element.height);
-            return {
+            if (spt.ScreenX == undefined || spt.ScreenY == undefined ||
+                bpt.ScreenX == undefined || bpt.ScreenY == undefined)
+                return { x: bounds.x, y: bounds.y, r: bounds.r, b: bounds.b };
+            else return {
                 x: Math.min(spt.ScreenX, bounds.x), y: Math.min(spt.ScreenY, bounds.y),
                 r: Math.max(bpt.ScreenX, bounds.r), b: Math.max(bpt.ScreenY, bounds.b)
             }