wxOSX: Rewiring GetBestSize for single line text control again

see #22374

include/wx/osx/cocoa/private/textimpl.h

@@ -85,6 +85,9 @@ public :
     virtual bool GetNewLineReplacement() wxOVERRIDE;
     virtual void SetInternalSelection( long from , long to );
     virtual void UpdateInternalSelectionFromEditor( wxNSTextFieldEditor* editor);
+
+    virtual wxSize GetBestSize() const wxOVERRIDE;
+
 protected :
     NSTextField* m_textField;
     long m_selStart;

src/osx/cocoa/textctrl.mm

@@ -1713,6 +1713,22 @@ void wxNSTextFieldControl::SetJustification()
     [m_textField setAlignment:align];
 }
 
+wxSize wxNSTextFieldControl::GetBestSize() const
+{
+    wxSize sz = wxDefaultSize;
+    if (  [m_textField respondsToSelector:@selector(sizeToFit)] )
+    {
+        NSRect former = [m_textField frame];
+        [m_textField sizeToFit];
+        NSRect best = [m_textField frame];
+        [m_textField setFrame:former];
+        sz.x = (int)ceil(best.size.width);
+        sz.y = (int)ceil(best.size.height);
+    }
+
+    return sz;
+}
+
 //
 //
 //