Add wxListCtrl::EnableAlternateRowColours() and SetAlternateRowColour().

Add methods to simply enable alternative row background colours in wxListCtrl.

Closes #14618.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73239 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/listctrl.h

@@ -407,6 +407,27 @@ public:
     wxTextCtrl* EditLabel(long item,
                           wxClassInfo* textControlClass = wxCLASSINFO(wxTextCtrl));
 
+    /**
+        Enable alternating row background colours (also called zebra striping).
+
+        This method can only be called for the control in virtual report mode,
+        i.e. having ::wxLC_REPORT and ::wxLC_VIRTUAL styles.
+
+        When enabling alternating colours, the appropriate colour for the even
+        rows is chosen automatically depending on the default foreground and
+        background colours which are used for the odd rows.
+
+        @param enable
+            If @true, enable alternating row background colours, i.e. different
+            colours for the odd and even rows. If @false, disable this feature
+            and use the same background colour for all rows.
+
+        @since 2.9.5
+
+        @see SetAlternateRowColour()
+     */
+    void EnableAlternateRowColours(bool enable = true);
+
     /**
         Enable or disable a beep if there is no match for the currently
         entered text when searching for the item from keyboard.
@@ -750,6 +771,26 @@ public:
     */
     wxRect GetViewRect() const;
 
+    /**
+        Set the alternative row background colour to a specific colour.
+
+        It is recommended to call EnableAlternateRowColours() instead of using
+        these methods as native implementations of this control might support
+        alternating row colours but not setting the exact colour to be used for
+        them.
+
+        As EnableAlternateRowColours(), this method can only be used with
+        controls having ::wxLC_REPORT and ::wxLC_VIRTUAL styles.
+
+        @param colour
+            A valid alternative row background colour to enable alternating
+            rows or invalid colour to disable them and use the same colour for
+            all rows.
+
+        @since 2.9.5
+     */
+    void SetAlternateRowColour(const wxColour& colour);
+
     /**
         Determines which item (if any) is at the specified point, giving details
         in @a flags. Returns index of the item or @c wxNOT_FOUND if no item is at