Fix positioning and placement of initially invisible items in layouts

Instead of misusing implicitWidth/Height as a storage mechanism in
scenarios where width/height is used for preferred size evaluation,
new members are created to hold this information to prevent incorrect
sizing in mentioned scenario and get rid of blocking signals.

Task-number: QTBUG-57455
Change-Id: I102c45805c4106e5829b17b65c2e247b2381573f
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/imports/layouts/qquicklayout_p.h b/src/imports/layouts/qquicklayout_p.h
index 7984e1bd4d..1e9984e337 100644
--- a/src/imports/layouts/qquicklayout_p.h
+++ b/src/imports/layouts/qquicklayout_p.h
@@ -294,6 +294,9 @@ private:
     qreal m_defaultMargins;
     QMarginsF m_margins;
 
+    qreal m_fallbackWidth;
+    qreal m_fallbackHeight;
+
     // GridLayout specific properties
     int m_row;
     int m_column;