From ea31edb2410308b4f610a027086c7b6f5ee72e1a Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Sat, 13 Feb 2010 12:25:58 +0000
Subject: Added new virtual methods, as discussed in fltk.development:  
 virtual Fl_Group*  Fl_Widget::as_group() const   virtual Fl_Window*
 Fl_Widget::as_window() const Todo: documentation is not yet complete.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7074 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Fl_Group.H  |  8 ++++++++
 FL/Fl_Widget.H | 16 ++++++++++++++++
 FL/Fl_Window.H |  8 ++++++++
 3 files changed, 32 insertions(+)

diff --git a/FL/Fl_Group.H b/FL/Fl_Group.H
index 941951cbf..7e1630d0b 100644
--- a/FL/Fl_Group.H
+++ b/FL/Fl_Group.H
@@ -176,6 +176,14 @@ public:
   */
   unsigned int clip_children() { return (flags() & CLIP_CHILDREN) != 0; }
 
+  /** Returns an Fl_Group pointer if this widget is an Fl_Group.
+  
+      \retval NULL if this widget is not derived from Fl_Group.
+      \note This method is provided to avoid dynamic_cast.
+      \todo More documentation ...
+   */
+  virtual Fl_Group* as_group() const { return (Fl_Group*)this; }
+
   // back compatibility functions:
 
   /**
diff --git a/FL/Fl_Widget.H b/FL/Fl_Widget.H
index 94591107e..95351f9f2 100644
--- a/FL/Fl_Widget.H
+++ b/FL/Fl_Widget.H
@@ -924,6 +924,22 @@ public:
    */
   Fl_Window* window() const ;
 
+  /** Returns an Fl_Group pointer if this widget is an Fl_Group.
+  
+      \retval NULL if this widget is not derived from Fl_Group.
+      \note This method is provided to avoid dynamic_cast.
+      \todo More documentation ...
+   */
+  virtual Fl_Group* as_group() const {return 0;}
+
+  /** Returns an Fl_Window pointer if this widget is an Fl_Window.
+  
+      \retval NULL if this widget is not derived from Fl_Window.
+      \note This method is provided to avoid dynamic_cast.
+      \todo More documentation ...
+   */
+  virtual Fl_Window* as_window() const {return 0;}
+
   /** For back compatibility only.
       \deprecated Use selection_color() instead.
   */
diff --git a/FL/Fl_Window.H b/FL/Fl_Window.H
index 2b7fdf84a..b2430e958 100644
--- a/FL/Fl_Window.H
+++ b/FL/Fl_Window.H
@@ -415,6 +415,14 @@ public:
   */
   void make_current();
 
+  /** Returns an Fl_Window pointer if this widget is an Fl_Window.
+  
+      \retval NULL if this widget is not derived from Fl_Window.
+      \note This method is provided to avoid dynamic_cast.
+      \todo More documentation ...
+   */
+  virtual Fl_Window* as_window() const { return (Fl_Window*)this; }
+
   // for back-compatibility only:
   /**
     Changes the cursor for this window.  This always calls the system, if
-- 
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