Add wxGrid::Render() for drawing the grid to any wxDC.

In particular, this allows to print the grid contents easily.

Closes #14294.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71577 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/grid/griddemo.h

@@ -111,6 +111,8 @@ public:
     void OnVTable( wxCommandEvent& );
     void OnBugsTable( wxCommandEvent& );
     void OnTabularTable( wxCommandEvent& );
+    void OnGridRender( wxCommandEvent& event );
+    void OnRenderPaint( wxPaintEvent& event );
 
     enum
     {
@@ -174,7 +176,18 @@ public:
         ID_SET_HIGHLIGHT_WIDTH,
         ID_SET_RO_HIGHLIGHT_WIDTH,
 
-        ID_TESTFUNC
+        ID_TESTFUNC,
+
+        ID_RENDER_ROW_LABEL,
+        ID_RENDER_COL_LABEL,
+        ID_RENDER_GRID_LINES,
+        ID_RENDER_GRID_BORDER,
+        ID_RENDER_SELECT_HLIGHT,
+        ID_RENDER_LOMETRIC,
+        ID_RENDER_COORDS,
+        ID_RENDER_ZOOM,
+        ID_RENDER_MARGIN,
+        ID_RENDER_DEFAULT_SIZE,
     };
 
 #if wxUSE_LOG
@@ -184,6 +197,8 @@ public:
     // add the cells to selection when using commands from select menu?
     bool m_addToSel;
 
+    wxBitmap m_gridBitmap;
+
     DECLARE_EVENT_TABLE()
 };