tdf#170787 Add weld::TreeView::get_cell_area(const weld::TreeIter&, const int)

Will be used in upcoming commit

Change-Id: I4437f1575b057be76e8faba774666794a7830c35
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/199501
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/vcl/weld/TreeView.hxx

@@ -525,6 +525,8 @@ public:
         = 0;
     virtual void unset_drag_dest_row() = 0;
     virtual tools::Rectangle get_row_area(const weld::TreeIter& rIter) const = 0;
+    virtual tools::Rectangle get_cell_area(const weld::TreeIter& rIter,
+                                           const int nColumn) const = 0;
     // for dragging and dropping between TreeViews, return the active source
     virtual TreeView* get_drag_source() const = 0;
 

vcl/inc/qt5/QtInstanceTreeView.hxx

@@ -154,6 +154,8 @@ public:
                                                                 bool bAutoScroll = true) override;
     virtual void unset_drag_dest_row() override;
     virtual tools::Rectangle get_row_area(const weld::TreeIter& rIter) const override;
+    virtual tools::Rectangle get_cell_area(const weld::TreeIter& rIter,
+                                           const int nColumn) const override;
     virtual weld::TreeView* get_drag_source() const override;
 
     using QtInstanceWidget::set_sensitive;

vcl/inc/salvtables.hxx

@@ -1813,6 +1813,9 @@ public:
 
     virtual tools::Rectangle get_row_area(const weld::TreeIter& rIter) const override;
 
+    virtual tools::Rectangle get_cell_area(const weld::TreeIter& rIter,
+                                           const int nColumn) const override;
+
     virtual TreeView* get_drag_source() const override;
 
     virtual int vadjustment_get_value() const override;

vcl/qt5/QtInstanceTreeView.cxx

@@ -836,6 +836,20 @@ tools::Rectangle QtInstanceTreeView::get_row_area(const weld::TreeIter& rIter) c
     return aRowArea;
 }
 
+tools::Rectangle QtInstanceTreeView::get_cell_area(const weld::TreeIter& rIter,
+                                                   const int nColumn) const
+{
+    SolarMutexGuard g;
+
+    tools::Rectangle aCellArea;
+    GetQtInstance().RunInMainThread([&] {
+        const QRect aCellRect = m_pTreeView->visualRect(modelIndex(rIter, nColumn));
+        aCellArea = toRectangle(aCellRect);
+    });
+
+    return aCellArea;
+}
+
 weld::TreeView* QtInstanceTreeView::get_drag_source() const
 {
     assert(false && "Not implemented yet");

vcl/source/app/salvtables.cxx

@@ -4801,6 +4801,24 @@ tools::Rectangle SalInstanceTreeView::get_row_area(const weld::TreeIter& rIter)
     return m_xTreeView->GetBoundingRect(static_cast<const SalInstanceTreeIter&>(rIter).iter);
 }
 
+tools::Rectangle SalInstanceTreeView::get_cell_area(const weld::TreeIter& rIter,
+                                                    const int nColumn) const
+{
+    if (nColumn < 0)
+        return {}; // Ignore expander column
+
+    int column = to_internal_model(nColumn);
+    auto rect = get_row_area(rIter);
+    rect.SetLeft(column == 1
+                     ? 0
+                     : m_xTreeView->GetLogicTab(
+                           column)); // GetLogicTab(1) gives position of internal expander bitmap
+    if (o3tl::make_unsigned(nColumn) < m_xTreeView->GetEntry(0)->ItemCount() - 1)
+        rect.SetRight(m_xTreeView->GetLogicTab(column + 1));
+
+    return rect;
+}
+
 weld::TreeView* SalInstanceTreeView::get_drag_source() const { return g_DragSource; }
 
 int SalInstanceTreeView::vadjustment_get_value() const

vcl/unx/gtk3/gtkinst.cxx

@@ -16004,6 +16004,23 @@ public:
         return aRet;
     }
 
+    virtual tools::Rectangle get_cell_area(const weld::TreeIter& rIter,
+                                           const int nColumn) const override
+    {
+        const GtkInstanceTreeIter& rGtkIter = static_cast<const GtkInstanceTreeIter&>(rIter);
+        GtkTreePath* pPath = gtk_tree_model_get_path(m_pTreeModel, const_cast<GtkTreeIter*>(&rGtkIter.iter));
+        GtkTreeViewColumn* pColumn = GTK_TREE_VIEW_COLUMN(g_list_nth_data(m_pColumns, nColumn));
+        assert(pColumn && "wrong count");
+
+         // Note: We do not check cell renderers inside the column because it appears to be difficult to find their focus area
+        GdkRectangle aRect;
+        gtk_tree_view_get_cell_area(m_pTreeView, pPath, pColumn, &aRect);
+        tools::Rectangle aRet(aRect.x, aRect.y, aRect.x + aRect.width, aRect.y + aRect.height);
+
+        gtk_tree_path_free(pPath);
+        return aRet;
+    }
+
     virtual void start_editing(const weld::TreeIter& rIter) override
     {
         const GtkInstanceTreeIter& rGtkIter = static_cast<const GtkInstanceTreeIter&>(rIter);