Implement wxDocument::Revert() and show its use in the sample.
wxDocument::Revert() method existed but didn't do anything, provide a default implementation for it. Also document it and show it in the sample. Closes #11849. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63748 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@@ -377,6 +377,7 @@ public:
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// Handlers for UI update commands
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void OnUpdateFileOpen(wxUpdateUIEvent& event);
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void OnUpdateDisableIfNoDoc(wxUpdateUIEvent& event);
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void OnUpdateFileRevert(wxUpdateUIEvent& event);
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void OnUpdateFileNew(wxUpdateUIEvent& event);
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void OnUpdateFileSave(wxUpdateUIEvent& event);
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void OnUpdateUndo(wxUpdateUIEvent& event);
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