restore DialControl Modify handlers

removed by a352018c76 but we will
need them again soon

Change-Id: Ibeaa4aeeec3dc073592ecf7e8c53b8bb03e791b4

svx/inc/svx/dialcontrol.hxx

@@ -81,6 +81,13 @@ public:
 
     /** Links the passed numeric edit field to the control (bi-directional). */
     void                SetLinkedField( NumericField* pField );
+    /** Returns the linked numeric edit field, or 0. */
+    NumericField*       GetLinkedField() const;
+
+    /** The passed handler is called whenever the totation value changes. */
+    void                SetModifyHdl( const Link& rLink );
+    /** Returns the current modify handler. */
+    const Link&         GetModifyHdl() const;
 
     /** Save value for later comparison */
     void                SaveValue();

svx/source/dialog/dialcontrol.cxx

@@ -458,6 +458,21 @@ bool DialControl::IsValueModified()
     return mpImpl->mnInitialAngle != mpImpl->mnAngle;
 }
 
+NumericField* DialControl::GetLinkedField() const
+{
+    return mpImpl->mpLinkField;
+}
+
+void DialControl::SetModifyHdl( const Link& rLink )
+{
+    mpImpl->maModifyHdl = rLink;
+}
+
+const Link& DialControl::GetModifyHdl() const
+{
+    return mpImpl->maModifyHdl;
+}
+
 // private --------------------------------------------------------------------
 
 void DialControl::Init( const Size& rWinSize, const Font& rWinFont )