Added wxGridBagSizer, a grid sizer where item positions can be

specified and row/col spanning is allowed.

Updated docs, the layout sample, files.bkl, and updated makefiles.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24416 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/sizer.h

@@ -59,7 +59,8 @@ public:
                  int border,
                  wxObject* userData );
 
-    ~wxSizerItem();
+    wxSizerItem();
+    virtual ~wxSizerItem();
 
     virtual void DeleteWindows();
 
@@ -418,6 +419,10 @@ public:
     virtual wxSize CalcMin();
 
 protected:
+    void AdjustForFlexDirection();
+    void AdjustForGrowables(const wxSize& sz, const wxSize& minsz,
+                            int nrows, int ncols);
+    
     // the heights/widths of all rows/columns
     wxArrayInt  m_rowHeights,
                 m_colWidths;