QQuickGrid: Warn if there are more items than rows*columns

Change-Id: I701d86079f2ddfb73b0470de97a2d1bff648166c
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
(cherry picked from commit a4a80db180540917e3077a2e22c71548f14fd8b6)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/src/quick/items/qquickpositioners.cpp b/src/quick/items/qquickpositioners.cpp
index a8d050527b..313143e881 100644
--- a/src/quick/items/qquickpositioners.cpp
+++ b/src/quick/items/qquickpositioners.cpp
@@ -1697,7 +1697,7 @@ void QQuickGrid::doPositioning(QSizeF *contentSize)
     QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this));
     int c = m_columns;
     int r = m_rows;
-    int numVisible = positionedItems.count();
+    const int numVisible = positionedItems.count();
 
     if (m_columns <= 0 && m_rows <= 0) {
         c = 4;
@@ -1714,6 +1714,10 @@ void QQuickGrid::doPositioning(QSizeF *contentSize)
         return; //Nothing else to do
     }
 
+    if (numVisible > r * c) {
+        qmlWarning(this) << "Grid contains more visible items (" << numVisible << ") than rows*columns (" << r * c << ")";
+    }
+
     QList<qreal> maxColWidth;
     QList<qreal> maxRowHeight;
     int childIndex =0;