Don't create platform window for QWindows when calling setVisible(false)

We can defer the creation until the window is shown.

Change-Id: I3d5b45ae59ee0925996cf12cd46dd574c8c6ef95
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 47277abea3..6092b08ea1 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -532,7 +532,9 @@ void QWindow::setVisible(bool visible)
         // can defer creation until the parent is created or we're re-parented.
         if (parent() && !parent()->handle())
             return;
-        else
+
+        // We only need to create the window if it's being shown
+        if (visible)
             create();
     }
 
@@ -574,7 +576,8 @@ void QWindow::setVisible(bool visible)
         d->applyCursor();
 #endif
 
-    d->platformWindow->setVisible(visible);
+    if (d->platformWindow)
+        d->platformWindow->setVisible(visible);
 
     if (!visible) {
         QHideEvent hideEvent;