Add a repro for a bug

examples/qtquick/customtitlebar/Guest.qml

@@ -10,27 +10,40 @@
 */
 
 import QtQuick 2.9
+import QtQuick.Controls 2.12
+import QtQuick.Layouts 1.12
+import QtQuick.Controls 1.5 as QQC1
+
+import com.kdab.dockwidgets 2.0 as KDDW
 
 Item {
     anchors.fill: parent
 
-    property alias background: background.source
-    property alias logo: logo.source
+    property var background
+    property var logo
 
+	KDDW.LayoutSaver {
+		id: layoutSaver
+	}
 
-    Image {
-        id: background
-        anchors.fill: parent
-        fillMode: Image.PreserveAspectCrop
+	Rectangle {
+		anchors.fill: parent
+		color: "green"
 
-        Image {
-            id: logo
+		ColumnLayout {
+			Button {
+				text: "Save"
+				onClicked: {
+					layoutSaver.saveToFile ("/tmp/layout");
+				}
+			}
 
-            fillMode: Image.PreserveAspectFit
-            anchors {
-                fill: parent
-                margins: 50
-            }
-        }
-    }
+			Button {
+				text: "Restore"
+				onClicked: {
+					layoutSaver.restoreFromFile ("/tmp/layout");
+				}
+			}
+		}
+	}
 }

examples/qtquick/customtitlebar/MyTitleBar.qml

@@ -32,6 +32,26 @@ KDDW.TitleBarBase {
         }
     }
 
+    Rectangle {
+        id: floatButton
+        visible: root.floatButtonVisible
+        radius: 5
+        color: "red"
+        height: root.height - 20
+        width: height
+        anchors {
+            right: closeButton.left
+            rightMargin: 10
+            verticalCenter: root.verticalCenter
+        }
+        MouseArea {
+            anchors.fill: parent
+            onClicked: {
+                root.floatButtonClicked();
+            }
+        }
+    }
+
     Rectangle {
         id: closeButton
         enabled: root.closeButtonEnabled

examples/qtquick/customtitlebar/main.cpp

@@ -57,21 +57,23 @@ int main(int argc, char *argv[])
 
     dw1->setGuestItem(QStringLiteral("qrc:/Guest1.qml"));
     dw1->resize(QSize(800, 800));
-    dw1->open();
+    // dw1->open();
 
     auto dw2 = new KDDockWidgets::Views::DockWidget_qtquick("Dock #2");
     dw2->setGuestItem(QStringLiteral("qrc:/Guest2.qml"));
     dw2->resize(QSize(800, 800));
-    dw2->open();
+    // dw2->open();
 
     auto dw3 = new KDDockWidgets::Views::DockWidget_qtquick("Dock #3");
     dw3->setGuestItem(QStringLiteral("qrc:/Guest3.qml"));
 
-    dw1->addDockWidgetToContainingWindow(dw3, KDDockWidgets::Location_OnRight);
+    // dw1->addDockWidgetToContainingWindow(dw3, KDDockWidgets::Location_OnRight);
 
     // Access the main area we created in QML with DockingArea {}
     auto mainArea = KDDockWidgets::DockRegistry::self()->mainDockingAreas().constFirst();
+    mainArea->addDockWidget(dw1, KDDockWidgets::Location_OnTop);
     mainArea->addDockWidget(dw2, KDDockWidgets::Location_OnTop);
+    mainArea->addDockWidget(dw3, KDDockWidgets::Location_OnTop);
 
     return app.exec();
 }