Applied Freeze()/Thaw() patch for wxTextCtrtl.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30834 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/textctrl.h

@@ -160,7 +160,7 @@ public:
     // avoid horrible flicker/scrolling back and forth
     virtual void Freeze();
     virtual void Thaw();
-
+    
     // textctrl specific scrolling
     virtual bool ScrollLines(int lines);
     virtual bool ScrollPages(int pages);
@@ -198,6 +198,11 @@ protected:
     // override this and return true.
     virtual bool UseGTKStyleBase() const { return true; }
 
+#ifdef __WXGTK20__
+    // has the control been frozen by Freeze()?
+    bool IsFrozen() const { return m_frozenness > 0; }
+#endif
+ 
 private:
     // change the font for everything in this control
     void ChangeFontGlobally();
@@ -212,6 +217,15 @@ private:
 #endif // !__WXGTK20__
     bool        m_ignoreNextUpdate:1;
 
+#ifdef __WXGTK20__
+    // Our text buffer. Convenient, and holds the buffer while using
+    // a dummy one when m_frozenness > 0
+    GtkTextBuffer *m_buffer;
+
+    // number of calls to Freeze() minus number of calls to Thaw()
+    unsigned int m_frozenness;
+#endif  
+
     DECLARE_EVENT_TABLE()
     DECLARE_DYNAMIC_CLASS(wxTextCtrl);
 };