X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/951090428fd85dd275a4cb87e340b3c9ceae3406..c4287548985b4a8246eb1d9b4ced2f346fc95253:/wxPython/src/_sizers.i

diff --git a/wxPython/src/_sizers.i b/wxPython/src/_sizers.i
index f3482de61e..9726d7b4fc 100644
--- a/wxPython/src/_sizers.i
+++ b/wxPython/src/_sizers.i
@@ -23,10 +23,13 @@
 
 DocStr(wxSizerItem,
 "The wx.SizerItem class is used to track the position, size and other
-attributes of each item managed by a `wx.Sizer`. In normal usage user
-code should never need to deal directly with a wx.SizerItem, but
-custom classes derived from `wx.PySizer` will probably need to use the
-collection of wx.SizerItems held by wx.Sizer when calculating layout.
+attributes of each item managed by a `wx.Sizer`. It is not usually
+necessary to use this class because the sizer elements can also be
+identified by their positions or window or sizer references but
+sometimes it may be more convenient to use wx.SizerItem directly.
+Also, custom classes derived from `wx.PySizer` will probably need to
+use the collection of wx.SizerItems held by wx.Sizer when calculating
+layout.
 
 :see: `wx.Sizer`, `wx.GBSizerItem`", "");
 
@@ -357,8 +360,8 @@ DocStr(wxSizer,
 "wx.Sizer is the abstract base class used for laying out subwindows in
 a window.  You cannot use wx.Sizer directly; instead, you will have to
 use one of the sizer classes derived from it such as `wx.BoxSizer`,
-`wx.StaticBoxSizer`, `wx.NotebookSizer`, `wx.GridSizer`,  `wx.FlexGridSizer`
-and `wx.GridBagSizer`.
+`wx.StaticBoxSizer`, `wx.GridSizer`, `wx.FlexGridSizer` and
+`wx.GridBagSizer`.
 
 The concept implemented by sizers in wxWidgets is closely related to
 layout tools in other GUI toolkits, such as Java's AWT, the GTK
@@ -1179,6 +1182,25 @@ define extra space between all children.", "");
         int , GetHGap(),
         "Returns the horizontal gap (in pixels) between cells in the sizer.", "");
 
+    %pythoncode {
+        def CalcRowsCols(self):
+            """
+            CalcRowsCols() -> (rows, cols)
+
+            Calculates how many rows and columns will be in the sizer based
+            on the current number of items and also the rows, cols specified
+            in the constructor.
+            """
+            nitems = len(self.GetChildren())
+            rows = self.GetRows()
+            cols = self.GetCols()
+            assert rows != 0 or cols != 0, "Grid sizer must have either rows or columns fixed"
+            if cols != 0:
+                rows = (nitems + cols - 1) / cols
+            elif rows != 0:
+                cols = (nitems + rows - 1) / rows
+            return (rows, cols)
+    }
 };
 
 //---------------------------------------------------------------------------