Resolves: tdf#128802 manage dnd ourself

instead of relying on the built-in dnd which is allowing
toplevel entries to be dropped on other ones to become
children of another entry, which is not what we want here.

Change-Id: I8c5528d9b26e994b7eda9d2972af0b3783187f3e
Reviewed-on: https://gerrit.libreoffice.org/82769
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

7 files changed, 63 insertions, 8 deletions

diff --git a/cui/source/customize/SvxMenuConfigPage.cxx b/cui/source/customize/SvxMenuConfigPage.cxx
index f560a25f1632..2b6ef9e52469 100644
--- a/cui/source/customize/SvxMenuConfigPage.cxx
+++ b/cui/source/customize/SvxMenuConfigPage.cxx
@@ -46,6 +46,7 @@ SvxMenuConfigPage::SvxMenuConfigPage(weld::Container* pPage, weld::DialogControl
     m_xGearBtn->show();
     m_xContentsListBox.reset(new SvxMenuEntriesListBox(m_xBuilder->weld_tree_view("menucontents"), this));
     weld::TreeView& rTreeView = m_xContentsListBox->get_widget();
+    m_xDropTargetHelper.reset(new SvxConfigPageFunctionDropTarget(*this, rTreeView));
     rTreeView.connect_size_allocate(LINK(this, SvxMenuConfigPage, MenuEntriesSizeAllocHdl));
     Size aSize(m_xFunctions->get_size_request());
     rTreeView.set_size_request(aSize.Width(), aSize.Height());
@@ -57,8 +58,6 @@ SvxMenuConfigPage::SvxMenuConfigPage(weld::Container* pPage, weld::DialogControl
     rTreeView.connect_changed(
         LINK( this, SvxMenuConfigPage, SelectMenuEntry ) );
 
-    rTreeView.connect_model_changed(LINK(this, SvxMenuConfigPage, ListModifiedHdl));
-
     m_xGearBtn->connect_selected(LINK(this, SvxMenuConfigPage, GearHdl));
 
     m_xCommandCategoryListBox->connect_changed(LINK(this, SvxMenuConfigPage, SelectCategory));
@@ -94,7 +93,7 @@ SvxMenuConfigPage::SvxMenuConfigPage(weld::Container* pPage, weld::DialogControl
     }
 }
 
-IMPL_LINK_NOARG(SvxMenuConfigPage, ListModifiedHdl, weld::TreeView&, void)
+void SvxMenuConfigPage::ListModified()
 {
     // regenerate with the current ordering within the list
     SvxEntries* pEntries = GetTopLevelSelection()->GetEntries();
diff --git a/cui/source/customize/SvxNotebookbarConfigPage.cxx b/cui/source/customize/SvxNotebookbarConfigPage.cxx
index 26cebe8cd583..af5bed877aef 100644
--- a/cui/source/customize/SvxNotebookbarConfigPage.cxx
+++ b/cui/source/customize/SvxNotebookbarConfigPage.cxx
@@ -127,6 +127,8 @@ SvxNotebookbarConfigPage::SvxNotebookbarConfigPage(weld::Container* pPage,
 
     m_xContentsListBox.reset(
         new SvxNotebookbarEntriesListBox(m_xBuilder->weld_tree_view("toolcontents"), this));
+    m_xDropTargetHelper.reset(
+        new SvxConfigPageFunctionDropTarget(*this, m_xContentsListBox->get_widget()));
     std::vector<int> aWidths;
     weld::TreeView& rTreeView = m_xContentsListBox->get_widget();
     Size aSize(m_xFunctions->get_size_request());
diff --git a/cui/source/customize/SvxToolbarConfigPage.cxx b/cui/source/customize/SvxToolbarConfigPage.cxx
index 36b3fd202d32..aee4abf651a6 100644
--- a/cui/source/customize/SvxToolbarConfigPage.cxx
+++ b/cui/source/customize/SvxToolbarConfigPage.cxx
@@ -51,6 +51,8 @@ SvxToolbarConfigPage::SvxToolbarConfigPage(weld::Container* pPage, weld::DialogC
     m_xContainer->set_help_id(HID_SVX_CONFIG_TOOLBAR);
 
     m_xContentsListBox.reset(new SvxToolbarEntriesListBox(m_xBuilder->weld_tree_view("toolcontents"), this));
+    m_xDropTargetHelper.reset(new SvxConfigPageFunctionDropTarget(*this, m_xContentsListBox->get_widget()));
+
     std::vector<int> aWidths;
     weld::TreeView& rTreeView = m_xContentsListBox->get_widget();
     Size aSize(m_xFunctions->get_size_request());
@@ -82,8 +84,6 @@ SvxToolbarConfigPage::SvxToolbarConfigPage(weld::Container* pPage, weld::DialogC
     rTreeView.connect_changed(
         LINK( this, SvxToolbarConfigPage, SelectToolbarEntry ) );
 
-    rTreeView.connect_model_changed(LINK(this, SvxToolbarConfigPage, ListModifiedHdl));
-
     m_xTopLevelListBox->set_help_id ( HID_SVX_TOPLEVELLISTBOX );
     m_xSaveInListBox->set_help_id( HID_SVX_SAVE_IN );
     m_xMoveUpButton->set_help_id( HID_SVX_UP_TOOLBAR_ITEM );
@@ -137,7 +137,7 @@ SvxToolbarConfigPage::SvxToolbarConfigPage(weld::Container* pPage, weld::DialogC
     }
 }
 
-IMPL_LINK_NOARG(SvxToolbarConfigPage, ListModifiedHdl, weld::TreeView&, void)
+void SvxToolbarConfigPage::ListModified()
 {
     // regenerate with the current ordering within the list
     SvxEntries* pEntries = GetTopLevelSelection()->GetEntries();
diff --git a/cui/source/customize/cfg.cxx b/cui/source/customize/cfg.cxx
index 2879d17b58ec..0f0f6dc7b1f9 100644
--- a/cui/source/customize/cfg.cxx
+++ b/cui/source/customize/cfg.cxx
@@ -3163,4 +3163,40 @@ SvxIconChangeDialog::SvxIconChangeDialog(weld::Window *pWindow, const OUString&
     m_xLineEditDescription->set_text(rMessage);
 }
 
+SvxConfigPageFunctionDropTarget::SvxConfigPageFunctionDropTarget(SvxConfigPage&rPage, weld::TreeView& rTreeView)
+    : DropTargetHelper(rTreeView.get_drop_target())
+    , m_rPage(rPage)
+    , m_rTreeView(rTreeView)
+{
+}
+
+sal_Int8 SvxConfigPageFunctionDropTarget::AcceptDrop(const AcceptDropEvent& rEvt)
+{
+    // to enable the autoscroll when we're close to the edges
+    m_rTreeView.get_dest_row_at_pos(rEvt.maPosPixel, nullptr);
+    return DND_ACTION_MOVE;
+}
+
+sal_Int8 SvxConfigPageFunctionDropTarget::ExecuteDrop( const ExecuteDropEvent& rEvt )
+{
+    weld::TreeView* pSource = m_rTreeView.get_drag_source();
+    // only draging within the same widget allowed
+    if (!pSource || pSource != &m_rTreeView)
+        return DND_ACTION_NONE;
+
+    std::unique_ptr<weld::TreeIter> xSource(m_rTreeView.make_iterator());
+    if (!m_rTreeView.get_selected(xSource.get()))
+        return DND_ACTION_NONE;
+
+    std::unique_ptr<weld::TreeIter> xTarget(m_rTreeView.make_iterator());
+    int nTargetPos = -1;
+    if (m_rTreeView.get_dest_row_at_pos(rEvt.maPosPixel, xTarget.get()))
+        nTargetPos = m_rTreeView.get_iter_index_in_parent(*xTarget);
+    m_rTreeView.move_subtree(*xSource, nullptr, nTargetPos);
+
+    m_rPage.ListModified();
+
+    return DND_ACTION_NONE;
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/cui/source/inc/SvxMenuConfigPage.hxx b/cui/source/inc/SvxMenuConfigPage.hxx
index 881f805fe097..5ff3aea6b0ba 100644
--- a/cui/source/inc/SvxMenuConfigPage.hxx
+++ b/cui/source/inc/SvxMenuConfigPage.hxx
@@ -45,7 +45,7 @@ private:
 
     DECL_LINK( MenuEntriesSizeAllocHdl, const Size&, void );
 
-    DECL_LINK( ListModifiedHdl, weld::TreeView&, void );
+    virtual void ListModified() override;
 
     void            Init() override;
     void            UpdateButtonStates() override;
diff --git a/cui/source/inc/SvxToolbarConfigPage.hxx b/cui/source/inc/SvxToolbarConfigPage.hxx
index 54204676456c..542eee2006d1 100644
--- a/cui/source/inc/SvxToolbarConfigPage.hxx
+++ b/cui/source/inc/SvxToolbarConfigPage.hxx
@@ -45,7 +45,7 @@ private:
     DECL_LINK( ModifyItemHdl, const OString&, void );
     DECL_LINK( ResetToolbarHdl, weld::Button&, void );
 
-    DECL_LINK( ListModifiedHdl, weld::TreeView&, void );
+    virtual void ListModified() override;
 
     void            UpdateButtonStates() override;
     short           QueryReset() override;
diff --git a/cui/source/inc/cfg.hxx b/cui/source/inc/cfg.hxx
index 71a36bdbf575..93f4346aa15f 100644
--- a/cui/source/inc/cfg.hxx
+++ b/cui/source/inc/cfg.hxx
@@ -19,6 +19,7 @@
 #ifndef INCLUDED_CUI_SOURCE_INC_CFG_HXX
 #define INCLUDED_CUI_SOURCE_INC_CFG_HXX
 
+#include <vcl/transfer.hxx>
 #include <vcl/weld.hxx>
 #include <svtools/valueset.hxx>
 
@@ -329,6 +330,7 @@ public:
     void remove(int nPos) { m_xControl->remove(nPos); }
     int n_children() const { return m_xControl->n_children(); }
     void set_text(int row, const OUString& rText, int col) { m_xControl->set_text(row, rText, col); }
+    OUString get_text(int row) { return m_xControl->get_text(row); }
     void set_image(int row, const css::uno::Reference<css::graphic::XGraphic>& rImage, int col) { m_xControl->set_image(row, rImage, col); }
     void set_dropdown(int row, int col) { m_xControl->set_image(row, *m_xDropDown, col); }
     void set_id(int row, const OUString& rId) { m_xControl->set_id(row, rId); }
@@ -350,6 +352,19 @@ public:
     void CreateDropDown();
 };
 
+class SvxConfigPageFunctionDropTarget : public DropTargetHelper
+{
+private:
+    SvxConfigPage& m_rPage;
+    weld::TreeView& m_rTreeView;
+
+    virtual sal_Int8 AcceptDrop( const AcceptDropEvent& rEvt ) override;
+    virtual sal_Int8 ExecuteDrop( const ExecuteDropEvent& rEvt ) override;
+
+public:
+    SvxConfigPageFunctionDropTarget(SvxConfigPage&rPage, weld::TreeView& rTreeView);
+};
+
 class SvxConfigPage : public SfxTabPage
 {
 private:
@@ -387,6 +402,7 @@ protected:
     // Used to add and remove toolbars/menus
     std::unique_ptr<weld::MenuButton>          m_xGearBtn;
     std::unique_ptr<SvxMenuEntriesListBox>     m_xContentsListBox;
+    std::unique_ptr<SvxConfigPageFunctionDropTarget> m_xDropTargetHelper;
 
     std::unique_ptr<weld::Button>              m_xMoveUpButton;
     std::unique_ptr<weld::Button>              m_xMoveDownButton;
@@ -462,6 +478,8 @@ public:
     virtual void    DeleteSelectedContent() = 0;
     virtual void    DeleteSelectedTopLevel() = 0;
 
+    virtual void    ListModified() {}
+
     SvxConfigEntry* GetTopLevelSelection()
     {
         return reinterpret_cast<SvxConfigEntry*>(m_xTopLevelListBox->get_active_id().toInt64());