Notebookbar: PriorityMergedHBox, OptionalBox

Change-Id: I7822fb1b6a342065d66a3fd62f1277e43c2562dd
Reviewed-on: https://gerrit.libreoffice.org/44694
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Szymon Kłos <szymon.klos@collabora.com>

10 files changed, 578 insertions, 196 deletions

diff --git a/sfx2/Library_sfx.mk b/sfx2/Library_sfx.mk
index 0d9dc14113c3..3dd3d892ed4c 100644
--- a/sfx2/Library_sfx.mk
+++ b/sfx2/Library_sfx.mk
@@ -241,8 +241,11 @@ $(eval $(call gb_Library_add_exception_objects,sfx,\
     sfx2/source/inet/inettbc \
     sfx2/source/notebookbar/ContextVBox \
     sfx2/source/notebookbar/DropdownBox \
+    sfx2/source/notebookbar/OptionalBox \
     sfx2/source/notebookbar/PriorityHBox \
+    sfx2/source/notebookbar/PriorityMergedHBox \
     sfx2/source/notebookbar/SfxNotebookBar \
+    sfx2/source/notebookbar/NotebookbarPopup \
     sfx2/source/notebookbar/NotebookbarTabControl \
     sfx2/source/notify/eventsupplier \
     sfx2/source/notify/globalevents \
diff --git a/sfx2/source/notebookbar/DropdownBox.cxx b/sfx2/source/notebookbar/DropdownBox.cxx
index aba34a36ab72..473e5c98be40 100644
--- a/sfx2/source/notebookbar/DropdownBox.cxx
+++ b/sfx2/source/notebookbar/DropdownBox.cxx
@@ -26,87 +26,6 @@
 #define NOTEBOOK_HEADER_HEIGHT 30
 
 /*
- * Popup - shows hidden content, controls are moved to this popup
- * and after close moved to the original parent
- */
-
-class Popup : public FloatingWindow
-{
-private:
-    VclPtr<VclHBox> m_pBox;
-    ScopedVclPtr<DropdownBox> m_pParent;
-
-public:
-    explicit Popup(const VclPtr<DropdownBox>& pParent)
-    : FloatingWindow(pParent, "Popup", "sfx/ui/notebookbarpopup.ui")
-    , m_pParent(pParent)
-    {
-        get(m_pBox, "box");
-        m_pBox->SetSizePixel(Size(100, 75));
-    }
-
-    virtual ~Popup() override
-    {
-        disposeOnce();
-    }
-
-    VclHBox* getBox()
-    {
-        return m_pBox.get();
-    }
-
-    virtual void PopupModeEnd() override
-    {
-        hideSeparators(false);
-        for (int i = 0; i < m_pBox->GetChildCount(); i++)
-        {
-            m_pBox->GetChild(i)->Hide();
-            m_pBox->GetChild(i)->SetParent(m_pParent);
-        }
-        FloatingWindow::PopupModeEnd();
-    }
-
-    void hideSeparators(bool bHide = true)
-    {
-        // separator on the beginning
-        Window* pWindow = m_pBox->GetChild(0);
-        while (pWindow && pWindow->GetType() == WindowType::CONTAINER)
-        {
-            pWindow = pWindow->GetChild(0);
-        }
-        if (pWindow && pWindow->GetType() == WindowType::FIXEDLINE)
-        {
-            if (bHide)
-                pWindow->Hide();
-            else
-                pWindow->Show();
-        }
-
-        // separator on the end
-        pWindow = m_pBox->GetChild(m_pBox->GetChildCount() - 1);
-        while (pWindow && pWindow->GetType() == WindowType::CONTAINER)
-        {
-            pWindow = pWindow->GetChild(pWindow->GetChildCount() - 1);
-        }
-        if (pWindow && pWindow->GetType() == WindowType::FIXEDLINE)
-        {
-            if (bHide)
-                pWindow->Hide();
-            else
-                pWindow->Show();
-        }
-    }
-
-    void dispose() override
-    {
-        m_pBox.disposeAndClear();
-        m_pParent.clear();
-
-        FloatingWindow::dispose();
-    }
-};
-
-/*
  * DropdownBox - shows content or moves it to the popup
  * which can be opened by clicking on a button
  */
@@ -152,6 +71,11 @@ void DropdownBox::HideContent()
     }
 }
 
+bool DropdownBox::IsHidden()
+{
+    return !m_bInFullView;
+}
+
 void DropdownBox::ShowContent()
 {
     if (!m_bInFullView)
@@ -170,7 +94,7 @@ IMPL_LINK(DropdownBox, PBClickHdl, Button*, /*pButton*/, void)
     if (m_pPopup)
         m_pPopup.disposeAndClear();
 
-    m_pPopup = VclPtr<Popup>::Create(this);
+    m_pPopup = VclPtr<NotebookbarPopup>::Create(this);
 
     for (int i = 0; i < GetChildCount(); i++)
     {
@@ -180,6 +104,8 @@ IMPL_LINK(DropdownBox, PBClickHdl, Button*, /*pButton*/, void)
             pChild->Show();
 
             pChild->SetParent(m_pPopup->getBox());
+            // count is decreased because we moved child
+            i--;
         }
     }
 
diff --git a/sfx2/source/notebookbar/DropdownBox.hxx b/sfx2/source/notebookbar/DropdownBox.hxx
index 6a34ae6d7705..6cb62d4e2f93 100644
--- a/sfx2/source/notebookbar/DropdownBox.hxx
+++ b/sfx2/source/notebookbar/DropdownBox.hxx
@@ -28,8 +28,7 @@
 #include <vcl/floatwin.hxx>
 #include <vcl/toolbox.hxx>
 #include <sfx2/tbxctrl.hxx>
-
-class Popup;
+#include "NotebookbarPopup.hxx"
 
 class SFX2_DLLPUBLIC DropdownBox : public VclHBox,
                                    public vcl::IPrioritable
@@ -37,7 +36,7 @@ class SFX2_DLLPUBLIC DropdownBox : public VclHBox,
 private:
     bool m_bInFullView;
     VclPtr<PushButton> m_pButton;
-    VclPtr<Popup> m_pPopup;
+    VclPtr<NotebookbarPopup> m_pPopup;
 
 public:
     explicit DropdownBox(vcl::Window *pParent);
@@ -46,6 +45,7 @@ public:
 
     void HideContent() override;
     void ShowContent() override;
+    bool IsHidden() override;
 
 private:
     DECL_LINK(PBClickHdl, Button*, void);
diff --git a/sfx2/source/notebookbar/NotebookbarPopup.cxx b/sfx2/source/notebookbar/NotebookbarPopup.cxx
new file mode 100644
index 000000000000..4c480af2c8d1
--- /dev/null
+++ b/sfx2/source/notebookbar/NotebookbarPopup.cxx
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "NotebookbarPopup.hxx"
+#include <vcl/IPrioritable.hxx>
+#include <vcl/layout.hxx>
+
+NotebookbarPopup::NotebookbarPopup(const VclPtr<VclHBox>& pParent)
+    : FloatingWindow(pParent, "Popup", "sfx/ui/notebookbarpopup.ui")
+    , m_pParent(pParent)
+{
+    get(m_pBox, "box");
+    m_pBox->SetSizePixel(Size(100, 75));
+}
+
+NotebookbarPopup::~NotebookbarPopup() { disposeOnce(); }
+
+VclHBox* NotebookbarPopup::getBox() { return m_pBox.get(); }
+
+void NotebookbarPopup::PopupModeEnd()
+{
+    hideSeparators(false);
+    while (m_pBox->GetChildCount())
+    {
+        vcl::IPrioritable* pChild = dynamic_cast<vcl::IPrioritable*>(GetChild(0));
+        if (pChild)
+            pChild->HideContent();
+
+        vcl::Window* pWindow = m_pBox->GetChild(0);
+        pWindow->SetParent(m_pParent);
+
+        if (m_pParent)
+            m_pParent->Resize();
+    }
+
+    FloatingWindow::PopupModeEnd();
+}
+
+void NotebookbarPopup::hideSeparators(bool bHide)
+{
+    // separator on the beginning
+    vcl::Window* pWindow = m_pBox->GetChild(0);
+    while (pWindow && pWindow->GetType() == WindowType::CONTAINER)
+    {
+        pWindow = pWindow->GetChild(0);
+    }
+    if (pWindow && pWindow->GetType() == WindowType::FIXEDLINE)
+    {
+        if (bHide)
+            pWindow->Hide();
+        else
+            pWindow->Show();
+    }
+
+    // separator on the end
+    pWindow = m_pBox->GetChild(m_pBox->GetChildCount() - 1);
+    while (pWindow && pWindow->GetType() == WindowType::CONTAINER)
+    {
+        pWindow = pWindow->GetChild(pWindow->GetChildCount() - 1);
+    }
+    if (pWindow && pWindow->GetType() == WindowType::FIXEDLINE)
+    {
+        if (bHide)
+            pWindow->Hide();
+        else
+            pWindow->Show();
+    }
+}
+
+void NotebookbarPopup::dispose()
+{
+    PopupModeEnd();
+    m_pBox.disposeAndClear();
+    m_pParent.clear();
+
+    FloatingWindow::dispose();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/notebookbar/NotebookbarPopup.hxx b/sfx2/source/notebookbar/NotebookbarPopup.hxx
new file mode 100755
index 000000000000..64de9cdc7304
--- /dev/null
+++ b/sfx2/source/notebookbar/NotebookbarPopup.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SFX2_NOTEBOOKBAR_NOTEBOOKBARPOPUP_HXX
+#define INCLUDED_SFX2_NOTEBOOKBAR_NOTEBOOKBARPOPUP_HXX
+
+#include <vcl/layout.hxx>
+#include <sfx2/dllapi.h>
+#include <sfx2/viewfrm.hxx>
+#include <vcl/floatwin.hxx>
+
+/*
+ * Popup - shows hidden content, controls are moved to this popup
+ * and after close moved to the original parent
+ */
+
+class SFX2_DLLPUBLIC NotebookbarPopup : public FloatingWindow
+{
+private:
+    VclPtr<VclHBox> m_pBox;
+    ScopedVclPtr<VclHBox> m_pParent;
+
+public:
+    explicit NotebookbarPopup(const VclPtr<VclHBox>& pParent);
+
+    virtual ~NotebookbarPopup() override;
+
+    VclHBox* getBox();
+
+    virtual void PopupModeEnd() override;
+
+    void hideSeparators(bool bHide = true);
+
+    void dispose() override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/notebookbar/OptionalBox.cxx b/sfx2/source/notebookbar/OptionalBox.cxx
new file mode 100644
index 000000000000..6a343ce48d07
--- /dev/null
+++ b/sfx2/source/notebookbar/OptionalBox.cxx
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <vcl/builderfactory.hxx>
+#include <vcl/layout.hxx>
+#include <sfx2/dllapi.h>
+#include <sfx2/viewfrm.hxx>
+#include "OptionalBox.hxx"
+
+/*
+ * OptionalBox - shows or hides the content. To use with PriorityHBox
+ * or PriorityMergedHBox
+ */
+
+OptionalBox::OptionalBox(vcl::Window* pParent)
+    : VclHBox(pParent)
+    , IPrioritable()
+    , m_bInFullView(true)
+{
+}
+
+OptionalBox::~OptionalBox() { disposeOnce(); }
+
+void OptionalBox::HideContent()
+{
+    if (m_bInFullView)
+    {
+        m_bInFullView = false;
+
+        for (int i = 0; i < GetChildCount(); i++)
+            GetChild(i)->Hide();
+
+        SetOutputSizePixel(Size(10, GetSizePixel().Height()));
+    }
+}
+
+void OptionalBox::ShowContent()
+{
+    if (!m_bInFullView)
+    {
+        m_bInFullView = true;
+
+        for (int i = 0; i < GetChildCount(); i++)
+            GetChild(i)->Show();
+    }
+}
+
+bool OptionalBox::IsHidden() { return !m_bInFullView; }
+
+VCL_BUILDER_FACTORY(OptionalBox)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/notebookbar/OptionalBox.hxx b/sfx2/source/notebookbar/OptionalBox.hxx
new file mode 100644
index 000000000000..ad36540aed61
--- /dev/null
+++ b/sfx2/source/notebookbar/OptionalBox.hxx
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SFX2_NOTEBOOKBAR_OPTIONALBOX_HXX
+#define INCLUDED_SFX2_NOTEBOOKBAR_OPTIONALBOX_HXX
+
+#include <vcl/builderfactory.hxx>
+#include <vcl/IPrioritable.hxx>
+#include <vcl/layout.hxx>
+#include <sfx2/dllapi.h>
+#include <sfx2/viewfrm.hxx>
+#include <vcl/floatwin.hxx>
+#include <vcl/toolbox.hxx>
+#include <sfx2/tbxctrl.hxx>
+
+class SFX2_DLLPUBLIC OptionalBox : public VclHBox, public vcl::IPrioritable
+{
+private:
+    bool m_bInFullView;
+
+public:
+    explicit OptionalBox(vcl::Window* pParent);
+    virtual ~OptionalBox() override;
+
+    void HideContent() override;
+    void ShowContent() override;
+    bool IsHidden() override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/notebookbar/PriorityHBox.cxx b/sfx2/source/notebookbar/PriorityHBox.cxx
index 913ef12495fa..83b6288afdcb 100644
--- a/sfx2/source/notebookbar/PriorityHBox.cxx
+++ b/sfx2/source/notebookbar/PriorityHBox.cxx
@@ -22,170 +22,189 @@
 #include <sfx2/dllapi.h>
 #include <sfx2/viewfrm.hxx>
 #include "DropdownBox.hxx"
+#include "PriorityHBox.hxx"
 
-#include <vector>
+namespace
+{
+    bool lcl_comparePriority(const vcl::IPrioritable* a, const vcl::IPrioritable* b)
+    {
+        return a->GetPriority() < b->GetPriority();
+    }
+}
 
-bool lcl_comparePriority(const vcl::IPrioritable* a, const vcl::IPrioritable* b)
+PriorityHBox::PriorityHBox(vcl::Window *pParent)
+    : VclHBox(pParent)
+    , m_bInitialized(false)
 {
-    return a->GetPriority() < b->GetPriority();
 }
 
-/*
- * PriorityHBox is a VclHBox which hides its own children if there is no sufficient space.
- * Hiding order can be modified using child's priorities. If a control have default
- * priority assigned (VCL_PRIORITY_DEFAULT), it is always shown.
- */
+PriorityHBox::~PriorityHBox()
+{
+    disposeOnce();
+}
 
-class SFX2_DLLPUBLIC PriorityHBox : public VclHBox
+void PriorityHBox::Initialize()
 {
-private:
-    bool m_bInitialized;
+    m_bInitialized = true;
 
-    std::vector<vcl::IPrioritable*> m_aSortedChilds;
+    GetChildrenWithPriorities();
+    SetSizeFromParent();
+}
 
-public:
-    explicit PriorityHBox(vcl::Window *pParent)
-        : VclHBox(pParent)
-        , m_bInitialized(false)
-    {
-    }
+int PriorityHBox::GetHiddenCount() const
+{
+    int nCount = 0;
 
-    virtual ~PriorityHBox() override
-    {
-        disposeOnce();
-    }
+    for (auto pWindow : m_aSortedChildren)
+        if (pWindow->IsHidden())
+            nCount++;
 
-    void Initialize()
-    {
-        m_bInitialized = true;
+    return nCount;
+}
 
-        GetChildrenWithPriorities();
-        SetSizeFromParent();
+void PriorityHBox::SetSizeFromParent()
+{
+    vcl::Window* pParent = GetParent();
+    if (pParent)
+    {
+        Size aParentSize = pParent->GetSizePixel();
+        SetSizePixel(Size(aParentSize.getWidth(), aParentSize.getHeight()));
     }
+}
 
-    void SetSizeFromParent()
+Size PriorityHBox::calculateRequisition() const
+{
+    if (!m_bInitialized)
     {
-        vcl::Window* pParent = GetParent();
-        if (pParent)
-        {
-            Size aParentSize = pParent->GetSizePixel();
-            SetSizePixel(Size(aParentSize.getWidth(), aParentSize.getHeight()));
-        }
+        return VclHBox::calculateRequisition();
     }
 
-    virtual Size calculateRequisition() const override
+    sal_uInt16 nVisibleChildren = 0;
+
+    Size aSize;
+    for (vcl::Window *pChild = GetWindow(GetWindowType::FirstChild); pChild; pChild = pChild->GetWindow(GetWindowType::Next))
     {
-        if (!m_bInitialized)
-        {
-            return VclHBox::calculateRequisition();
-        }
+        if (!pChild->IsVisible())
+            continue;
+        ++nVisibleChildren;
+        Size aChildSize = getLayoutRequisition(*pChild);
 
-        sal_uInt16 nVisibleChildren = 0;
+        bool bAllwaysExpanded = true;
 
-        Size aSize;
-        for (vcl::Window *pChild = GetWindow(GetWindowType::FirstChild); pChild; pChild = pChild->GetWindow(GetWindowType::Next))
-        {
-            if (!pChild->IsVisible())
-                continue;
-            ++nVisibleChildren;
-            Size aChildSize = getLayoutRequisition(*pChild);
+        vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
+        if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
+            bAllwaysExpanded = false;
 
-            bool bAllwaysExpanded = true;
+        if (bAllwaysExpanded)
+        {
+            long nPrimaryDimension = getPrimaryDimension(aChildSize);
+            nPrimaryDimension += pChild->get_padding() * 2;
+            setPrimaryDimension(aChildSize, nPrimaryDimension);
+        }
+        else
+            setPrimaryDimension(aChildSize, 0);
 
-            vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
-            if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
-                bAllwaysExpanded = false;
+        accumulateMaxes(aChildSize, aSize);
+    }
 
-            if (bAllwaysExpanded)
-            {
-                long nPrimaryDimension = getPrimaryDimension(aChildSize);
-                nPrimaryDimension += pChild->get_padding() * 2;
-                setPrimaryDimension(aChildSize, nPrimaryDimension);
-            }
-            else
-                setPrimaryDimension(aChildSize, 0);
+    return finalizeMaxes(aSize, nVisibleChildren);
+}
 
-            accumulateMaxes(aChildSize, aSize);
-        }
+void PriorityHBox::Resize()
+{
+    if (!m_bInitialized && SfxViewFrame::Current())
+        Initialize();
 
-        return finalizeMaxes(aSize, nVisibleChildren);
+    if (!m_bInitialized)
+    {
+        return VclHBox::Resize();
     }
 
-    virtual void Resize() override
+    long nWidth = GetSizePixel().Width();
+    long nCurrentWidth = VclHBox::calculateRequisition().getWidth();
+
+    // Hide lower priority controls
+    auto pChild = m_aSortedChildren.begin();
+    while (nCurrentWidth > nWidth && pChild != m_aSortedChildren.end())
     {
-        if (!m_bInitialized && SfxViewFrame::Current())
-            Initialize();
+        vcl::Window* pWindow = dynamic_cast<vcl::Window*>(*pChild);
+        vcl::IPrioritable* pPrioritable = *pChild;
 
-        if (!m_bInitialized)
+        if(pWindow->GetParent() != this)
         {
-            return VclHBox::Resize();
+            pChild++;
+            continue;
         }
 
-        long nWidth = GetSizePixel().Width();
-        long nCurrentWidth = VclHBox::calculateRequisition().getWidth();
-
-        // Hide lower priority controls
-        auto pChild = m_aSortedChilds.begin();
-        while (nCurrentWidth > nWidth && pChild != m_aSortedChilds.end())
+        if (pWindow)
         {
-            // ATM DropdownBox is the only one derived class from IPrioritable
-            DropdownBox* pDropdownBox = static_cast<DropdownBox*>(*pChild);
+            nCurrentWidth -= pWindow->GetOutputWidthPixel() + get_spacing();
+            pWindow->Show();
+            pPrioritable->HideContent();
+            nCurrentWidth += pWindow->GetOutputWidthPixel() + get_spacing();
+        }
 
-            nCurrentWidth -= pDropdownBox->GetOutputWidthPixel() + get_spacing();
-            pDropdownBox->HideContent();
-            nCurrentWidth += pDropdownBox->GetOutputWidthPixel() + get_spacing();
+        pChild++;
+    }
 
-            pChild++;
-        }
+    auto pChildR = m_aSortedChildren.rbegin();
+    // Show higher priority controls if we already have enough space
+    while (pChildR != m_aSortedChildren.rend())
+    {
+        vcl::Window* pWindow = dynamic_cast<vcl::Window*>(*pChildR);
+        vcl::IPrioritable* pPrioritable = *pChildR;
 
-        auto pChildR = m_aSortedChilds.rbegin();
-        // Show higher priority controls if we already have enough space
-        while (pChildR != m_aSortedChilds.rend())
+        if(pWindow->GetParent() != this)
         {
-            DropdownBox* pBox = static_cast<DropdownBox*>(*pChildR);
+            pChildR++;
+            continue;
+        }
 
-            nCurrentWidth -= pBox->GetOutputWidthPixel() + get_spacing();
-            pBox->ShowContent();
-            nCurrentWidth += getLayoutRequisition(*pBox).Width() + get_spacing();
+        if (pWindow)
+        {
+            nCurrentWidth -= pWindow->GetOutputWidthPixel() + get_spacing();
+            pWindow->Show();
+            pPrioritable->ShowContent();
+            nCurrentWidth += getLayoutRequisition(*pWindow).Width() + get_spacing();
 
             if (nCurrentWidth > nWidth)
             {
-                pBox->HideContent();
+                pPrioritable->HideContent();
                 break;
             }
-
-            pChildR++;
         }
 
-        VclHBox::Resize();
+        pChildR++;
     }
 
-    virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect) override
-    {
-        if (!m_bInitialized && SfxViewFrame::Current())
-            Initialize();
+    VclHBox::Resize();
+}
 
-        VclHBox::Paint(rRenderContext, rRect);
-    }
+void PriorityHBox::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect)
+{
+    if (!m_bInitialized && SfxViewFrame::Current())
+        Initialize();
 
-    void GetChildrenWithPriorities()
+    VclHBox::Paint(rRenderContext, rRect);
+}
+
+void PriorityHBox::GetChildrenWithPriorities()
+{
+    for (sal_uInt16 i = 0; i < GetChildCount(); ++i)
     {
-        for (sal_uInt16 i = 0; i < GetChildCount(); ++i)
-        {
-            vcl::Window* pChild = GetChild(i);
+        vcl::Window* pChild = GetChild(i);
 
-            // Add only containers which have explicitly assigned priority.
-            vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
-            if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
-                m_aSortedChilds.push_back(pPrioritable);
-        }
+        // Add only containers which have explicitly assigned priority.
+        vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
+        if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
+            m_aSortedChildren.push_back(pPrioritable);
+    }
 
-        if (!m_aSortedChilds.size())
-            m_bInitialized = false;
+    if (!m_aSortedChildren.size())
+        m_bInitialized = false;
 
-        std::sort(m_aSortedChilds.begin(), m_aSortedChilds.end(), lcl_comparePriority);
-    }
-};
+    std::sort(m_aSortedChildren.begin(), m_aSortedChildren.end(), lcl_comparePriority);
+}
 
 VCL_BUILDER_FACTORY(PriorityHBox)
 
diff --git a/sfx2/source/notebookbar/PriorityHBox.hxx b/sfx2/source/notebookbar/PriorityHBox.hxx
new file mode 100644
index 000000000000..8248264093f5
--- /dev/null
+++ b/sfx2/source/notebookbar/PriorityHBox.hxx
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <vcl/builderfactory.hxx>
+#include <vcl/layout.hxx>
+#include <sfx2/dllapi.h>
+#include <sfx2/viewfrm.hxx>
+#include "DropdownBox.hxx"
+
+#include <vector>
+
+#ifndef INCLUDED_SFX2_NOTEBOOKBAR_PRIORITYHBOX_HXX
+#define INCLUDED_SFX2_NOTEBOOKBAR_PRIORITYHBOX_HXX
+
+/*
+ * PriorityHBox is a VclHBox which hides its own children if there is no sufficient space.
+ * Hiding order can be modified using child's priorities. If a control have default
+ * priority assigned (VCL_PRIORITY_DEFAULT), it is always shown.
+ */
+
+class SFX2_DLLPUBLIC PriorityHBox : public VclHBox
+{
+private:
+    bool m_bInitialized;
+
+    std::vector<vcl::IPrioritable*> m_aSortedChildren;
+
+protected:
+    int GetHiddenCount() const;
+
+public:
+    explicit PriorityHBox(vcl::Window* pParent);
+
+    virtual ~PriorityHBox() override;
+
+    void Initialize();
+
+    void SetSizeFromParent();
+
+    virtual Size calculateRequisition() const override;
+
+    virtual void Resize() override;
+
+    virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect) override;
+
+    void GetChildrenWithPriorities();
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/notebookbar/PriorityMergedHBox.cxx b/sfx2/source/notebookbar/PriorityMergedHBox.cxx
new file mode 100644
index 000000000000..e52c467b6c23
--- /dev/null
+++ b/sfx2/source/notebookbar/PriorityMergedHBox.cxx
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+* This file is part of the LibreOffice project.
+*
+* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*
+* This file incorporates work covered by the following license notice:
+*
+*   Licensed to the Apache Software Foundation (ASF) under one or more
+*   contributor license agreements. See the NOTICE file distributed
+*   with this work for additional information regarding copyright
+*   ownership. The ASF licenses this file to you under the Apache
+*   License, Version 2.0 (the "License"); you may not use this file
+*   except in compliance with the License. You may obtain a copy of
+*   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+*/
+
+#include <vcl/builderfactory.hxx>
+#include <vcl/layout.hxx>
+#include <sfx2/dllapi.h>
+#include <sfx2/viewfrm.hxx>
+#include "OptionalBox.hxx"
+#include "PriorityHBox.hxx"
+#include "NotebookbarPopup.hxx"
+
+/*
+* PriorityMergedHBox is a VclHBox which hides its own children if there is no sufficient space.
+*/
+
+class SFX2_DLLPUBLIC PriorityMergedHBox : public PriorityHBox
+{
+private:
+    VclPtr<PushButton> m_pButton;
+    VclPtr<NotebookbarPopup> m_pPopup;
+
+    DECL_LINK(PBClickHdl, Button*, void);
+
+public:
+    explicit PriorityMergedHBox(vcl::Window* pParent)
+        : PriorityHBox(pParent)
+    {
+        m_pButton = VclPtr<PushButton>::Create(this, WB_FLATBUTTON);
+        m_pButton->SetClickHdl(LINK(this, PriorityMergedHBox, PBClickHdl));
+        m_pButton->SetSymbol(SymbolType::NEXT);
+        m_pButton->set_width_request(15);
+        m_pButton->set_pack_type(VclPackType::End);
+        m_pButton->Show();
+    }
+
+    virtual ~PriorityMergedHBox() override { disposeOnce(); }
+
+    virtual void Resize() override
+    {
+        PriorityHBox::Resize();
+        if (GetHiddenCount())
+            m_pButton->Show();
+        else
+            m_pButton->Hide();
+    }
+
+    virtual void dispose() override
+    {
+        m_pButton.disposeAndClear();
+        if (m_pPopup)
+            m_pPopup.disposeAndClear();
+        PriorityHBox::dispose();
+    }
+};
+
+IMPL_LINK(PriorityMergedHBox, PBClickHdl, Button*, /*pButton*/, void)
+{
+    if (m_pPopup)
+        m_pPopup.disposeAndClear();
+
+    m_pPopup = VclPtr<NotebookbarPopup>::Create(this);
+
+    for (int i = 0; i < GetChildCount(); i++)
+    {
+        vcl::Window* pWindow = GetChild(i);
+        if (pWindow != m_pButton)
+        {
+            vcl::IPrioritable* pChild = dynamic_cast<vcl::IPrioritable*>(pWindow);
+
+            if (pChild && pChild->IsHidden())
+            {
+                pChild->ShowContent();
+                pWindow->Show();
+                pWindow->SetParent(m_pPopup->getBox());
+                // count is decreased because we moved child
+                i--;
+            }
+        }
+    }
+
+    m_pPopup->hideSeparators(true);
+
+    m_pPopup->getBox()->set_height_request(GetSizePixel().Height());
+
+    long x = m_pButton->GetPosPixel().getX();
+    long y = m_pButton->GetPosPixel().getY() + GetSizePixel().Height();
+    tools::Rectangle aRect(x, y, x, y);
+
+    m_pPopup->StartPopupMode(aRect, FloatWinPopupFlags::Down | FloatWinPopupFlags::GrabFocus
+                                        | FloatWinPopupFlags::AllMouseButtonClose);
+}
+
+VCL_BUILDER_FACTORY(PriorityMergedHBox)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */