Added URL support to attribute objects and to wxRichTextCtrl,

generating a wxTextUrlEvent as appropriate.
Added outline list support and updated previews.
Added alignment support for bullets.
Added single right parenthesis support.
Added XML stylesheet reading/writing.
Changed SetBulletSymbol to SetBulletText so it can support
bullet text more generally (e.g. for cached outline list numbering)
Added wxRichTextRenderer to isolate e.g. bullet drawing and make
it customisable.
Added event handler support to wxRichTextBuffer.
Updated documentation.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42431 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/richtext/richtextxml.h

@@ -17,6 +17,7 @@
  */
 
 #include "wx/richtext/richtextbuffer.h"
+#include "wx/richtext/richtextstyles.h"
 
 #if wxUSE_RICHTEXT && wxUSE_XML
 
@@ -37,9 +38,11 @@ public:
 #if wxUSE_STREAMS
     /// Recursively export an object
     bool ExportXML(wxOutputStream& stream, wxMBConv* convMem, wxMBConv* convFile, wxRichTextObject& obj, int level);
+    bool ExportStyleDefinition(wxOutputStream& stream, wxMBConv* convMem, wxMBConv* convFile, wxRichTextStyleDefinition* def, int level);
 
     /// Recursively import an object
     bool ImportXML(wxRichTextBuffer* buffer, wxXmlNode* node);
+    bool ImportStyleDefinition(wxRichTextStyleSheet* sheet, wxXmlNode* node);
 
     /// Create style parameters
     wxString CreateStyle(const wxTextAttrEx& attr, bool isPara = false);