added wxWindow::IsFrozen() (only existed in wxMSW and wxDFB before)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41207 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/window.tex

@@ -1529,6 +1529,18 @@ implements the following methods:\par
 \end{twocollist}}}
 
 
+\membersection{wxWindow::IsFrozen}\label{wxwindowisfrozen}
+
+\constfunc{virtual bool}{IsFrozen}{\void}
+
+Returns \true if the window is currently frozen by a call to 
+\helpref{Freeze()}{wxwindowfreeze}.
+
+\wxheading{See also}
+
+\helpref{Thaw()}{wxwindowthaw}
+
+
 \membersection{wxWindow::IsRetained}\label{wxwindowisretained}
 
 \constfunc{virtual bool}{IsRetained}{\void}

include/wx/dfb/window.h

@@ -75,7 +75,7 @@ public:
     virtual void Clear();
     virtual void Freeze();
     virtual void Thaw();
-    bool IsFrozen() const { return m_frozenness > 0; }
+    virtual bool IsFrozen() const { return m_frozenness > 0; }
 
     virtual bool SetCursor(const wxCursor &cursor);
     virtual bool SetFont(const wxFont &font) { m_font = font; return true; }

include/wx/msw/window.h

@@ -83,6 +83,7 @@ public:
     virtual void Update();
     virtual void Freeze();
     virtual void Thaw();
+    virtual bool IsFrozen() const { return m_frozenness > 0; }
 
     virtual void SetWindowStyleFlag(long style);
     virtual void SetExtraStyle(long exStyle);
@@ -460,9 +461,6 @@ protected:
     virtual void DoCaptureMouse();
     virtual void DoReleaseMouse();
 
-    // has the window been frozen by Freeze()?
-    bool IsFrozen() const { return m_frozenness > 0; }
-
     // this simply moves/resizes the given HWND which is supposed to be our
     // sibling (this is useful for controls which are composite at MSW level
     // and for which DoMoveWindow() is not enough)

include/wx/window.h

@@ -719,6 +719,9 @@ public:
         // thaw the window: redraw it after it had been frozen
     virtual void Thaw() { }
 
+        // return true if window had been frozen and not unthawed yet
+    virtual bool IsFrozen() const { return false; }
+
         // adjust DC for drawing on this window
     virtual void PrepareDC( wxDC & WXUNUSED(dc) ) { }