Adjust the layout if a QGraphicsWidget is explicitly hidden

Since layout items can now be hidden, this also makes sure we respect
the QSizePolicy::retainSizeWhenHidden

Task-number: QTBUG-20132
Change-Id: Iab59fc9b61d4ca1bb2208c479a027da6eb0283a9
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/auto/widgets/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp b/tests/auto/widgets/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp
index d35667f215..107e3eb48a 100644
--- a/tests/auto/widgets/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp
@@ -50,6 +50,7 @@ private slots:
     void compressLayoutRequest();
     void automaticReparenting();
     void verifyActivate();
+    void sizeHintOfHiddenLayout();
     void invalidate();
     void constructors();
     void alternativeLayoutItems();
@@ -279,6 +280,30 @@ void tst_QGraphicsLayout::verifyActivate()
 
 }
 
+
+void tst_QGraphicsLayout::sizeHintOfHiddenLayout()
+{
+    QGraphicsScene scene;
+    QGraphicsView view(&scene);
+
+    QGraphicsWidget *window = new QGraphicsWidget(0, Qt::Window);
+    scene.addItem(window);
+    TestLayout *lout = new TestLayout(window);
+    lout->setContentsMargins(1,2,2,1);
+    QGraphicsWidget *w = new QGraphicsWidget;
+    w->setPreferredSize(20, 20);
+    w->setMaximumSize(50, 50);
+    lout->addItem(w);
+    window->setLayout(lout);
+
+    for (int pass = 0; pass < 3; ++pass) {
+        QCOMPARE(lout->sizeHint(Qt::MinimumSize), QSizeF(3,3));
+        QCOMPARE(lout->sizeHint(Qt::PreferredSize), QSizeF(23,23));
+        QCOMPARE(lout->sizeHint(Qt::MaximumSize), QSizeF(53,53));
+        window->setVisible(pass % 2);
+    }
+}
+
 static void clearAllCounters(TestGraphicsWidget *widget)
 {
     if (!widget)