diff --git a/include/wx/generic/dvrenderers.h b/include/wx/generic/dvrenderers.h
index 60d431f84e..7a0a9ddf73 100644
--- a/include/wx/generic/dvrenderers.h
+++ b/include/wx/generic/dvrenderers.h
@@ -18,7 +18,9 @@
 class WXDLLIMPEXP_ADV wxDataViewCustomRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewCustomRenderer( const wxString &varianttype = wxT("string"),
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewCustomRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -46,7 +48,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewTextRenderer( const wxString &varianttype = wxT("string"),
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewTextRenderer( const wxString &varianttype = GetDefaultType(),
                             wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                             int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -76,7 +80,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewBitmapRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewBitmapRenderer( const wxString &varianttype = wxT("wxBitmap"),
+    static wxString GetDefaultType() { return wxS("wxBitmap"); }
+
+    wxDataViewBitmapRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -101,7 +107,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewToggleRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewToggleRenderer( const wxString &varianttype = wxT("bool"),
+    static wxString GetDefaultType() { return wxS("bool"); }
+
+    wxDataViewToggleRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -131,8 +139,10 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewProgressRenderer: public wxDataViewRenderer
 {
 public:
+    static wxString GetDefaultType() { return wxS("long"); }
+
     wxDataViewProgressRenderer( const wxString &label = wxEmptyString,
-                                const wxString &varianttype = wxT("long"),
+                                const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -157,7 +167,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewIconTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewIconTextRenderer( const wxString &varianttype = wxT("wxDataViewIconText"),
+    static wxString GetDefaultType() { return wxS("wxDataViewIconText"); }
+
+    wxDataViewIconTextRenderer( const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
 
diff --git a/include/wx/gtk/dvrenderers.h b/include/wx/gtk/dvrenderers.h
index 385fa73a0b..416e0ee98f 100644
--- a/include/wx/gtk/dvrenderers.h
+++ b/include/wx/gtk/dvrenderers.h
@@ -25,7 +25,9 @@
 class WXDLLIMPEXP_ADV wxDataViewTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewTextRenderer( const wxString &varianttype = "string",
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewTextRenderer( const wxString &varianttype = GetDefaultType(),
                             wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                             int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -68,7 +70,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewBitmapRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewBitmapRenderer( const wxString &varianttype = "wxBitmap",
+    static wxString GetDefaultType() { return wxS("wxBitmap"); }
+
+    wxDataViewBitmapRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -86,7 +90,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewToggleRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewToggleRenderer( const wxString &varianttype = "bool",
+    static wxString GetDefaultType() { return wxS("bool"); }
+
+    wxDataViewToggleRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -104,7 +110,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewCustomRenderer: public wxDataViewCustomRendererBase
 {
 public:
-    wxDataViewCustomRenderer( const wxString &varianttype = "string",
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewCustomRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT,
                               bool no_init = false );
@@ -166,8 +174,10 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewProgressRenderer: public wxDataViewCustomRenderer
 {
 public:
+    static wxString GetDefaultType() { return wxS("long"); }
+
     wxDataViewProgressRenderer( const wxString &label = wxEmptyString,
-                                const wxString &varianttype = "long",
+                                const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
     virtual ~wxDataViewProgressRenderer();
@@ -201,7 +211,9 @@ protected:
 class WXDLLIMPEXP_ADV wxDataViewIconTextRenderer: public wxDataViewTextRenderer
 {
 public:
-    wxDataViewIconTextRenderer( const wxString &varianttype = "wxDataViewIconText",
+    static wxString GetDefaultType() { return wxS("wxDataViewIconText"); }
+
+    wxDataViewIconTextRenderer( const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
     virtual ~wxDataViewIconTextRenderer();
diff --git a/include/wx/osx/dvrenderers.h b/include/wx/osx/dvrenderers.h
index d046b1a851..8798611ff4 100644
--- a/include/wx/osx/dvrenderers.h
+++ b/include/wx/osx/dvrenderers.h
@@ -17,7 +17,9 @@
 class WXDLLIMPEXP_ADV wxDataViewCustomRenderer : public wxDataViewCustomRendererBase
 {
 public:
-    wxDataViewCustomRenderer(const wxString& varianttype = "string",
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewCustomRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -51,7 +53,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewTextRenderer(const wxString& varianttype = "string",
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewTextRenderer(const wxString& varianttype = GetDefaultType(),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                            int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -74,7 +78,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewBitmapRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewBitmapRenderer(const wxString& varianttype = "wxBitmap",
+    static wxString GetDefaultType() { return wxS("wxBitmap"); }
+
+    wxDataViewBitmapRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -122,7 +128,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewIconTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewIconTextRenderer(const wxString& varianttype = "wxDataViewIconText",
+    static wxString GetDefaultType() { return wxS("wxDataViewIconText"); }
+
+    wxDataViewIconTextRenderer(const wxString& varianttype = GetDefaultType(),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -145,7 +153,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewToggleRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewToggleRenderer(const wxString& varianttype = "bool",
+    static wxString GetDefaultType() { return wxS("bool"); }
+
+    wxDataViewToggleRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -168,8 +178,10 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewProgressRenderer: public wxDataViewRenderer
 {
 public:
+    static wxString GetDefaultType() { return wxS("long"); }
+
     wxDataViewProgressRenderer(const wxString& label = wxEmptyString,
-                               const wxString& varianttype = "long",
+                               const wxString& varianttype = GetDefaultType(),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -192,7 +204,9 @@ private:
 class WXDLLIMPEXP_ADV wxDataViewDateRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewDateRenderer(const wxString& varianttype = "datetime",
+    static wxString GetDefaultType() { return wxS("datetime"); }
+
+    wxDataViewDateRenderer(const wxString& varianttype = GetDefaultType(),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_ACTIVATABLE,
                            int align = wxDVR_DEFAULT_ALIGNMENT);
 
diff --git a/include/wx/qt/dvrenderers.h b/include/wx/qt/dvrenderers.h
index 75a19a87b0..6ae3e527a6 100644
--- a/include/wx/qt/dvrenderers.h
+++ b/include/wx/qt/dvrenderers.h
@@ -15,7 +15,9 @@
 class WXDLLIMPEXP_ADV wxDataViewTextRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewTextRenderer( const wxString &varianttype = wxT("string"),
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewTextRenderer( const wxString &varianttype = GetDefaultType(),
                             wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                             int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -32,7 +34,9 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewBitmapRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewBitmapRenderer( const wxString &varianttype = wxT("wxBitmap"),
+    static wxString GetDefaultType() { return wxS("wxBitmap"); }
+
+    wxDataViewBitmapRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -47,7 +51,9 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewToggleRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewToggleRenderer( const wxString &varianttype = wxT("bool"),
+    static wxString GetDefaultType() { return wxS("bool"); }
+
+    wxDataViewToggleRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
@@ -62,7 +68,9 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewCustomRenderer: public wxDataViewRenderer
 {
 public:
-    wxDataViewCustomRenderer( const wxString &varianttype = wxT("string"),
+    static wxString GetDefaultType() { return wxS("string"); }
+
+    wxDataViewCustomRenderer( const wxString &varianttype = GetDefaultType(),
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT,
                               bool no_init = false );
@@ -97,8 +105,10 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewProgressRenderer: public wxDataViewCustomRenderer
 {
 public:
+    static wxString GetDefaultType() { return wxS("long"); }
+
     wxDataViewProgressRenderer( const wxString &label = wxEmptyString,
-                                const wxString &varianttype = wxT("long"),
+                                const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
     virtual ~wxDataViewProgressRenderer();
@@ -117,7 +127,9 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewIconTextRenderer: public wxDataViewCustomRenderer
 {
 public:
-    wxDataViewIconTextRenderer( const wxString &varianttype = wxT("wxDataViewIconText"),
+    static wxString GetDefaultType() { return wxS("wxDataViewIconText"); }
+
+    wxDataViewIconTextRenderer( const wxString &varianttype = GetDefaultType(),
                                 wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                 int align = wxDVR_DEFAULT_ALIGNMENT );
     virtual ~wxDataViewIconTextRenderer();
@@ -140,7 +152,9 @@ public:
 class WXDLLIMPEXP_ADV wxDataViewDateRenderer: public wxDataViewCustomRenderer
 {
 public:
-    wxDataViewDateRenderer( const wxString &varianttype = wxT("datetime"),
+    static wxString GetDefaultType() { return wxS("datetime"); }
+
+    wxDataViewDateRenderer( const wxString &varianttype = GetDefaultType(),
                             wxDataViewCellMode mode = wxDATAVIEW_CELL_ACTIVATABLE,
                             int align = wxDVR_DEFAULT_ALIGNMENT );
 
diff --git a/interface/wx/dataview.h b/interface/wx/dataview.h
index 1609406ee3..5b1339ee55 100644
--- a/interface/wx/dataview.h
+++ b/interface/wx/dataview.h
@@ -1904,10 +1904,17 @@ protected:
 class wxDataViewTextRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
-    wxDataViewTextRenderer(const wxString& varianttype = "string",
+    wxDataViewTextRenderer(const wxString& varianttype = GetDefaultType(),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                            int align = wxDVR_DEFAULT_ALIGNMENT );
 };
@@ -1930,10 +1937,17 @@ public:
 class wxDataViewIconTextRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
-    wxDataViewIconTextRenderer(const wxString& varianttype = "wxDataViewIconText",
+    wxDataViewIconTextRenderer(const wxString& varianttype = GetDefaultType(),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT );
 };
@@ -1951,11 +1965,18 @@ public:
 class wxDataViewProgressRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
     wxDataViewProgressRenderer(const wxString& label = wxEmptyString,
-                               const wxString& varianttype = "long",
+                               const wxString& varianttype = GetDefaultType(),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT );
 };
@@ -1997,10 +2018,17 @@ public:
 class wxDataViewToggleRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
-    wxDataViewToggleRenderer(const wxString& varianttype = "bool",
+    wxDataViewToggleRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 };
@@ -2075,10 +2103,17 @@ public:
 class wxDataViewDateRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
-    wxDataViewDateRenderer(const wxString& varianttype = "datetime",
+    wxDataViewDateRenderer(const wxString& varianttype = GetDefaultType(),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_ACTIVATABLE,
                            int align = wxDVR_DEFAULT_ALIGNMENT);
 };
@@ -2107,10 +2142,17 @@ public:
 class wxDataViewCustomRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         Constructor.
     */
-    wxDataViewCustomRenderer(const wxString& varianttype = "string",
+    wxDataViewCustomRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 
@@ -2310,10 +2352,17 @@ protected:
 class wxDataViewBitmapRenderer : public wxDataViewRenderer
 {
 public:
+    /**
+        Returns the wxVariant type used with this renderer.
+
+        @since 3.1.0
+     */
+    static wxString GetDefaultType();
+
     /**
         The ctor.
     */
-    wxDataViewBitmapRenderer(const wxString& varianttype = "wxBitmap",
+    wxDataViewBitmapRenderer(const wxString& varianttype = GetDefaultType(),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT);
 };