X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4a00e77ce6fe935b99a3a92dd5dcd7bfcddf4b6d..19b409860202ab9bdc27dab3d17f388c1a1d9717:/include/wx/sizer.h

diff --git a/include/wx/sizer.h b/include/wx/sizer.h
index 7839946cd1..f4b0b4ba8a 100644
--- a/include/wx/sizer.h
+++ b/include/wx/sizer.h
@@ -510,7 +510,7 @@ public:
     wxSizerItem* Add( int width, int height, const wxSizerFlags& flags);
     wxSizerItem* Add( wxSizerItem *item);
 
-    wxSizerItem* AddSpacer(int size);
+    virtual wxSizerItem *AddSpacer(int size);
     wxSizerItem* AddStretchSpacer(int prop = 1);
 
     wxSizerItem* Insert(size_t index,
@@ -740,13 +740,13 @@ public:
 
     void SetCols( int cols )
     {
-        wxASSERT_MSG( cols >= 0, "Number of columns must be positive");
+        wxASSERT_MSG( cols >= 0, "Number of columns must be non-negative");
         m_cols = cols;
     }
 
     void SetRows( int rows )
     {
-        wxASSERT_MSG( rows >= 0, "Number of rows must be positive");
+        wxASSERT_MSG( rows >= 0, "Number of rows must be non-negative");
         m_rows = rows;
     }
 
@@ -757,18 +757,49 @@ public:
     int GetVGap() const         { return m_vgap; }
     int GetHGap() const         { return m_hgap; }
 
+    int GetEffectiveColsCount() const   { return m_cols ? m_cols : CalcCols(); }
+    int GetEffectiveRowsCount() const   { return m_rows ? m_rows : CalcRows(); }
+
     // return the number of total items and the number of columns and rows
     // (for internal use only)
     int CalcRowsCols(int& rows, int& cols) const;
 
 protected:
+    // the number of rows/columns in the sizer, if 0 then it is determined
+    // dynamically depending on the total number of items
     int    m_rows;
     int    m_cols;
+
+    // gaps between rows and columns
     int    m_vgap;
     int    m_hgap;
 
     void SetItemBounds( wxSizerItem *item, int x, int y, int w, int h );
 
+    // returns the number of columns/rows needed for the current total number
+    // of children (and the fixed number of rows/columns)
+    int CalcCols() const
+    {
+        wxCHECK_MSG
+        (
+            m_rows, 0,
+            "Can't calculate number of cols if number of rows is not specified"
+        );
+
+        return (m_children.GetCount() + m_rows - 1) / m_rows;
+    }
+
+    int CalcRows() const
+    {
+        wxCHECK_MSG
+        (
+            m_cols, 0,
+            "Can't calculate number of cols if number of rows is not specified"
+        );
+
+        return (m_children.GetCount() + m_cols - 1) / m_cols;
+    }
+
 private:
     DECLARE_CLASS(wxGridSizer)
 };
@@ -882,6 +913,8 @@ public:
                       wxT("invalid value for wxBoxSizer orientation") );
     }
 
+    virtual wxSizerItem *AddSpacer(int size);
+
     int GetOrientation() const { return m_orient; }
 
     bool IsVertical() const { return m_orient == wxVERTICAL; }