mark the document as modified when its text control is (closes #10826)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60720 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/docview/doc.h

@@ -164,6 +164,9 @@ class wxTextDocument : public wxDocument
 {
 public:
     wxTextDocument() : wxDocument() { }
+
+    virtual bool OnCreate(const wxString& path, long flags); 
+
     virtual wxTextCtrl* GetTextCtrl() const = 0;
 
     virtual bool IsModified() const;
@@ -173,6 +176,8 @@ protected:
     virtual bool DoSaveDocument(const wxString& filename);
     virtual bool DoOpenDocument(const wxString& filename);
 
+    void OnTextChange(wxCommandEvent& event);
+
     wxDECLARE_NO_COPY_CLASS(wxTextDocument);
     DECLARE_CLASS(wxTextDocument)
 };