QMainWindow doesn't respect the sizehint of the dockwidgets

It used to compress it because in the layout we were never picking the
sizeHint. Now we do.

Task-number: 260483

2 files changed, 23 insertions, 4 deletions

diff --git a/src/gui/widgets/qdockarealayout.cpp b/src/gui/widgets/qdockarealayout.cpp
index 3d1d3b1602..3920ae90f7 100644
--- a/src/gui/widgets/qdockarealayout.cpp
+++ b/src/gui/widgets/qdockarealayout.cpp
@@ -2601,28 +2601,28 @@ void QDockAreaLayout::getGrid(QVector<QLayoutStruct> *_ver_struct_list,
         center_rect.setBottom(rect.bottom() - docks[QInternal::BottomDock].rect.height() - sep);
 
     QSize left_hint = docks[QInternal::LeftDock].size();
-    if (!left_hint.isValid())
+    if (left_hint.isNull())
         left_hint = docks[QInternal::LeftDock].sizeHint();
     QSize left_min = docks[QInternal::LeftDock].minimumSize();
     QSize left_max = docks[QInternal::LeftDock].maximumSize();
     left_hint = left_hint.boundedTo(left_max).expandedTo(left_min);
 
     QSize right_hint = docks[QInternal::RightDock].size();
-    if (!right_hint.isValid())
+    if (right_hint.isNull())
         right_hint = docks[QInternal::RightDock].sizeHint();
     QSize right_min = docks[QInternal::RightDock].minimumSize();
     QSize right_max = docks[QInternal::RightDock].maximumSize();
     right_hint = right_hint.boundedTo(right_max).expandedTo(right_min);
 
     QSize top_hint = docks[QInternal::TopDock].size();
-    if (!top_hint.isValid())
+    if (top_hint.isNull())
         top_hint = docks[QInternal::TopDock].sizeHint();
     QSize top_min = docks[QInternal::TopDock].minimumSize();
     QSize top_max = docks[QInternal::TopDock].maximumSize();
     top_hint = top_hint.boundedTo(top_max).expandedTo(top_min);
 
     QSize bottom_hint = docks[QInternal::BottomDock].size();
-    if (!bottom_hint.isValid())
+    if (bottom_hint.isNull())
         bottom_hint = docks[QInternal::BottomDock].sizeHint();
     QSize bottom_min = docks[QInternal::BottomDock].minimumSize();
     QSize bottom_max = docks[QInternal::BottomDock].maximumSize();
diff --git a/tests/auto/qmainwindow/tst_qmainwindow.cpp b/tests/auto/qmainwindow/tst_qmainwindow.cpp
index ffa58536da..0049c8df7b 100644
--- a/tests/auto/qmainwindow/tst_qmainwindow.cpp
+++ b/tests/auto/qmainwindow/tst_qmainwindow.cpp
@@ -107,6 +107,7 @@ private slots:
     void setCursor();
     void addToolbarAfterShow();
     void centralWidgetSize();
+    void dockWidgetSize();
 };
 
 // Testing get/set functions
@@ -1677,6 +1678,24 @@ void tst_QMainWindow::centralWidgetSize()
     QCOMPARE(widget.size(), widget.sizeHint());
 }
 
+void tst_QMainWindow::dockWidgetSize()
+{
+    QMainWindow mainWindow;
+    mainWindow.menuBar()->addMenu("menu");
+
+    MyWidget widget;
+    mainWindow.setCentralWidget(&widget);
+
+    QDockWidget dock;
+    dock.setWidget(new MyWidget);
+    mainWindow.addDockWidget(Qt::TopDockWidgetArea, &dock);
+
+    mainWindow.show();
+    QTest::qWait(100);
+    QCOMPARE(widget.size(), widget.sizeHint());
+    QCOMPARE(dock.widget()->size(), dock.widget()->sizeHint());
+}
+
 
 QTEST_MAIN(tst_QMainWindow)
 #include "tst_qmainwindow.moc"