Add wxDataViewCtrl::GenericGetHeader() accessor

And show how to use it to increase the header size in the sample.

include/wx/dataview.h

@@ -30,6 +30,7 @@
 
 class WXDLLIMPEXP_FWD_CORE wxImageList;
 class WXDLLIMPEXP_FWD_CORE wxItemAttr;
+class WXDLLIMPEXP_FWD_CORE wxHeaderCtrl;
 
 #if !(defined(__WXGTK20__) || defined(__WXOSX__) ) || defined(__WXUNIVERSAL__)
 // #if !(defined(__WXOSX__)) || defined(__WXUNIVERSAL__)

include/wx/generic/dataview.h

@@ -263,6 +263,11 @@ public:
     wxColour GetAlternateRowColour() const { return m_alternateRowColour; }
     void SetAlternateRowColour(const wxColour& colour);
 
+    // The returned pointer is null if the control has wxDV_NO_HEADER style.
+    //
+    // This method is only available in the generic versions.
+    wxHeaderCtrl* GenericGetHeader() const;
+
 protected:
     void EnsureVisibleRowCol( int row, int column );
 

samples/dataview/dataview.cpp

@@ -35,6 +35,10 @@
 #include "wx/itemattr.h"
 #include "wx/notebook.h"
 
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+    #include "wx/headerctrl.h"
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
+
 #include "mymodels.h"
 
 // ----------------------------------------------------------------------------
@@ -76,6 +80,9 @@ private:
     void OnStyleChange(wxCommandEvent& event);
     void OnSetBackgroundColour(wxCommandEvent& event);
     void OnCustomHeaderAttr(wxCommandEvent& event);
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+    void OnCustomHeaderHeight(wxCommandEvent& event);
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
     void OnSetForegroundColour(wxCommandEvent& event);
     void OnIncIndent(wxCommandEvent& event);
     void OnDecIndent(wxCommandEvent& event);
@@ -293,6 +300,9 @@ enum
     ID_BACKGROUND_COLOUR,
     ID_FOREGROUND_COLOUR,
     ID_CUSTOM_HEADER_ATTR,
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+    ID_CUSTOM_HEADER_HEIGHT,
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
     ID_STYLE_MENU,
     ID_INC_INDENT,
     ID_DEC_INDENT,
@@ -348,6 +358,9 @@ wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_MENU( ID_FOREGROUND_COLOUR, MyFrame::OnSetForegroundColour )
     EVT_MENU( ID_BACKGROUND_COLOUR, MyFrame::OnSetBackgroundColour )
     EVT_MENU( ID_CUSTOM_HEADER_ATTR, MyFrame::OnCustomHeaderAttr )
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+    EVT_MENU( ID_CUSTOM_HEADER_HEIGHT, MyFrame::OnCustomHeaderHeight )
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
     EVT_MENU( ID_INC_INDENT, MyFrame::OnIncIndent )
     EVT_MENU( ID_DEC_INDENT, MyFrame::OnDecIndent )
 
@@ -436,6 +449,9 @@ MyFrame::MyFrame(wxFrame *frame, const wxString &title, int x, int y, int w, int
     file_menu->Append(ID_FOREGROUND_COLOUR, "Set &foreground colour...\tCtrl-S");
     file_menu->Append(ID_BACKGROUND_COLOUR, "Set &background colour...\tCtrl-B");
     file_menu->AppendCheckItem(ID_CUSTOM_HEADER_ATTR, "C&ustom header attributes");
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+    file_menu->AppendCheckItem(ID_CUSTOM_HEADER_HEIGHT, "Custom header &height");
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
     file_menu->Append(ID_STYLE_MENU, "&Style", style_menu);
     file_menu->Append(ID_INC_INDENT, "&Increase indent\tCtrl-I");
     file_menu->Append(ID_DEC_INDENT, "&Decrease indent\tShift-Ctrl-I");
@@ -808,6 +824,26 @@ void MyFrame::OnCustomHeaderAttr(wxCommandEvent& event)
         wxLogMessage("Sorry, header attributes not supported on this platform");
 }
 
+#ifdef wxHAS_GENERIC_DATAVIEWCTRL
+void MyFrame::OnCustomHeaderHeight(wxCommandEvent& event)
+{
+    wxDataViewCtrl * const dvc = m_ctrl[m_notebook->GetSelection()];
+    wxHeaderCtrl* const header = dvc->GenericGetHeader();
+    if ( !header )
+    {
+        wxLogMessage("No header");
+        return;
+    }
+
+    // Use a big height to show that this works.
+    wxSize size = event.IsChecked() ? FromDIP(wxSize(0, 80)) : wxDefaultSize;
+    header->SetMinSize(size);
+    header->Refresh();
+
+    dvc->Layout();
+}
+#endif // wxHAS_GENERIC_DATAVIEWCTRL
+
 void MyFrame::OnIncIndent(wxCommandEvent& WXUNUSED(event))
 {
     wxDataViewCtrl * const dvc = m_ctrl[m_notebook->GetSelection()];

src/generic/datavgen.cpp

@@ -4625,6 +4625,11 @@ wxBorder wxDataViewCtrl::GetDefaultBorder() const
     return wxBORDER_THEME;
 }
 
+wxHeaderCtrl* wxDataViewCtrl::GenericGetHeader() const
+{
+    return m_headerArea;
+}
+
 #ifdef __WXMSW__
 WXLRESULT wxDataViewCtrl::MSWWindowProc(WXUINT nMsg,
                                         WXWPARAM wParam,