qml: Fix title bars not showing their title

src/private/Frame_p.h

@@ -244,6 +244,7 @@ protected:
      * Any widget having 16777215x16777215 is ignored (represents not having a max-size, QWIDGETSIZE_MAX)
      */
     QSize biggestDockWidgetMaxSize() const;
+    void onDockWidgetCountChanged();
 
     virtual void removeWidget_impl(DockWidgetBase *) = 0;
     virtual void detachTab_impl(DockWidgetBase *) = 0;
@@ -260,7 +261,6 @@ private:
     Q_DISABLE_COPY(Frame)
     friend class TestDocks;
     friend class TabWidget;
-    void onDockWidgetCountChanged();
     void onCurrentTabChanged(int index);
     void scheduleDeleteLater();
     bool event(QEvent *) override;

src/private/quick/FrameQuick.cpp

@@ -42,9 +42,10 @@ FrameQuick::FrameQuick(QWidgetAdapter *parent, FrameOptions options)
     item->setParent(this);
 }
 
-void FrameQuick::removeWidget_impl(DockWidgetBase *)
+void FrameQuick::removeWidget_impl(DockWidgetBase *dw)
 {
-
+    m_dockWidgets.removeOne(dw);
+    onDockWidgetCountChanged();
 }
 
 void FrameQuick::detachTab_impl(DockWidgetBase *)
@@ -52,43 +53,64 @@ void FrameQuick::detachTab_impl(DockWidgetBase *)
 
 }
 
-int FrameQuick::indexOfDockWidget_impl(DockWidgetBase *)
+int FrameQuick::indexOfDockWidget_impl(DockWidgetBase *dw)
 {
-    return 0;
+    return m_dockWidgets.indexOf(dw);
 }
 
 int FrameQuick::currentIndex_impl() const
 {
-    return 0;
+    if (!m_currentDockWidget)
+        return -1;
+
+    return m_dockWidgets.indexOf(m_currentDockWidget);
 }
 
 void FrameQuick::setCurrentTabIndex_impl(int index)
 {
-    Q_UNUSED(index)
+    m_currentDockWidget = dockWidgetAt(index);
 }
 
-void FrameQuick::setCurrentDockWidget_impl(DockWidgetBase *)
+void FrameQuick::setCurrentDockWidget_impl(DockWidgetBase *dw)
 {
+    if (dw && !m_dockWidgets.contains(dw)) {
+        qWarning() << Q_FUNC_INFO << "Shouldn't happen";
+        return;
+    }
 
+    m_currentDockWidget = dw;
 }
 
-void FrameQuick::insertDockWidget_impl(DockWidgetBase *, int index)
+void FrameQuick::insertDockWidget_impl(DockWidgetBase *dw, int index)
 {
-    Q_UNUSED(index)
+    if (m_dockWidgets.contains(dw)) {
+        qWarning() << Q_FUNC_INFO << "Shouldn't happen";
+        return;
+    }
+
+    m_dockWidgets.insert(index, dw);
+    if (!m_currentDockWidget)
+        m_currentDockWidget = dw;
+
+    onDockWidgetCountChanged();
 }
 
 DockWidgetBase *FrameQuick::dockWidgetAt_impl(int index) const
 {
-    Q_UNUSED(index)
-    return nullptr;
+    if (index < 0 || index >= m_dockWidgets.size()) {
+        qWarning() << Q_FUNC_INFO << "Shouldn't happen" << index << m_dockWidgets.size();
+        return nullptr;
+    }
+
+    return m_dockWidgets[index];
 }
 
 DockWidgetBase *FrameQuick::currentDockWidget_impl() const
 {
-    return nullptr;
+    return m_currentDockWidget;
 }
 
 int FrameQuick::dockWidgetCount_impl() const
 {
-    return 0;
+    return m_dockWidgets.size();
 }

src/private/quick/FrameQuick_p.h

@@ -14,6 +14,7 @@
 #define KD_FRAME_QUICK_P_H
 
 #include "Frame_p.h"
+#include "DockWidgetBase.h"
 
 namespace KDDockWidgets {
 
@@ -37,6 +38,9 @@ protected:
     DockWidgetBase *dockWidgetAt_impl(int index) const override;
     DockWidgetBase *currentDockWidget_impl() const override;
     int dockWidgetCount_impl() const override;
+private:
+    DockWidgetBase::List m_dockWidgets;
+    DockWidgetBase *m_currentDockWidget = nullptr;
 };
 
 }