qtquick: Override min size for FrameQuick

Fixes constriants not propagating from dock widget to frame

src/private/quick/FrameQuick.cpp

@@ -162,6 +162,22 @@ void FrameQuick::setStackLayout(QQuickItem *stackLayout)
     m_stackLayout = stackLayout;
 }
 
+QSize FrameQuick::minimumSize() const
+{
+    const QSize contentsSize = dockWidgetsMinSize();
+    return contentsSize + QSize(0, nonContentsHeight());
+}
+
+QSize FrameQuick::maximumSize() const
+{
+    return Frame::maximumSize();
+}
+
+int FrameQuick::nonContentsHeight() const
+{
+    return m_visualItem->property("nonContentsHeight").toInt();
+}
+
 DockWidgetModel::DockWidgetModel(QObject *parent)
     : QAbstractListModel(parent)
 {

src/private/quick/FrameQuick_p.h

@@ -36,6 +36,12 @@ public:
     ~FrameQuick() override;
     DockWidgetModel *dockWidgetModel() const;
 
+    /// @reimp
+    QSize minimumSize() const override;
+
+    /// @reimp
+    QSize maximumSize() const override;
+
 protected:
     void removeWidget_impl(DockWidgetBase *) override;
     int indexOfDockWidget_impl(DockWidgetBase *) override;
@@ -52,6 +58,7 @@ protected:
 Q_SIGNALS:
     void tabTitlesChanged();
 private:
+    int nonContentsHeight() const;
     QQuickItem *m_stackLayout = nullptr;
     QQuickItem *m_visualItem = nullptr;
     DockWidgetBase *m_currentDockWidget = nullptr;

src/private/quick/qml/Frame.qml

@@ -17,7 +17,8 @@ Rectangle {
     id: root
     property QtObject frameCpp
     readonly property QtObject titleBarCpp: frameCpp ? frameCpp.titleBar : null
-
+    readonly property int nonContentsHeight: (titleBar.visible ? titleBar.height : 0) +
+                                             (tabbar.visible ? tabbar.height : 0)
     color: "cyan"
     anchors.fill: parent
 

tests/tst_docks.cpp

@@ -6095,20 +6095,40 @@ void TestDocks::tst_propagateSizeHonoursMinSize()
     min1 = widgetMinLength(dock1, Qt::Vertical);
     QVERIFY(dock1->height() >= min1);
 }
+
 void TestDocks::tst_constraintsPropagateUp()
 {
     // Mostly for QtQuick, which doesn't have any layouts, so we need to make the propagation
     // Manually in DockWidgetQuick::minimumSize(), in FrameQuick, etc.
 
     EnsureTopLevelsDeleted e;
+    const int minWidth = 500;
     const int minHeight = 400;
-    auto guestWidget = new MyWidget2(QSize(400, minHeight));
+    const QSize minSz = { minWidth, minHeight };
+    auto guestWidget = new MyWidget2(QSize(minWidth, minHeight));
     auto dock1 = createDockWidget("dock1", guestWidget);
+    auto dock2= createDockWidget("dock2", new MyWidget2(QSize(minWidth, minHeight)));
+
     QCOMPARE(widgetMinLength(guestWidget, Qt::Vertical), minHeight);
+    QCOMPARE(widgetMinLength(guestWidget, Qt::Horizontal), minWidth);
+    QCOMPARE(dock1->minimumWidth(), minWidth);
     QCOMPARE(dock1->minimumHeight(), minHeight);
+    QCOMPARE(dock1->minimumSize(), minSz);
+
+    auto frame1 = dock1->frame();
+
+    QVERIFY(qAbs(widgetMinLength(frame1, Qt::Vertical) - minHeight) < 10); //10px for styling differences
+    QVERIFY(qAbs(widgetMinLength(frame1, Qt::Horizontal) - minWidth) < 10); //10px for styling differences
+
+    // Add dock2 side-by side, so the Frame now has a title bar.
+    auto oldFw2 = dock2->window();
+    dock1->addDockWidgetToContainingWindow(dock2, Location_OnLeft);
+    TitleBar *tb = dock1->titleBar();
+    QVERIFY(tb->isVisible());
+    QVERIFY(qAbs(widgetMinLength(frame1, Qt::Vertical) - (minHeight + tb->height())) < 10);
 
     delete dock1->window();
-
+    delete oldFw2;
 }
 
 void TestDocks::tst_constraintsAfterPlaceholder()