Add wxGenericAboutDialog documentation.

Closes #14660.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72548 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/generic/aboutdlgg.h

@@ -0,0 +1,118 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/generic/aboutdlgg.h
+// Purpose:     generic wxAboutBox() implementation
+// Author:      eranon
+// Created:     2012-09-25
+// RCS-ID:      $Id$
+// Copyright:   (c) 2012 wxWidgets development team
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+/**
+    @class wxGenericAboutDialog
+
+    This class defines a customizable @e About dialog.
+
+    Note that if you don't need customization, you should use the global
+    wxAboutBox() function that is both easier to use and shows the native
+    dialog if available.
+
+    To use this class, you need to derive your own class from it and override
+    the virtual method DoAddCustomControls().
+
+    To instantiate an object from your wxGenericAboutDialog-based class, you
+    can use either the default constructor followed by a call to Create(), or
+    directly using the alternate constructor. In either case, you have to
+    prepare a wxAboutDialogInfo containing standard informations to display in
+    an about-box.
+
+    Example of usage, MyAboutDlg being a class derived from wxGenericAboutDialog:
+    @code
+    void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
+    {
+        wxAboutDialogInfo aboutInfo;
+
+        aboutInfo.SetName("MyApp");
+        aboutInfo.SetVersion(MY_APP_VERSION_STRING);
+        aboutInfo.SetDescription(_("My wxWidgets-based application!"));
+        aboutInfo.SetCopyright("(C) 1992-2012");
+        aboutInfo.SetWebSite("http://myapp.org");
+        aboutInfo.AddDeveloper("My Self");
+
+        MyAboutDlg dlgAbout(aboutInfo, this);
+        dlgAbout.ShowModal();
+    }
+    @endcode
+
+    @library{wxadv}
+    @category{cmndlg}
+
+    @see wxAboutDialogInfo
+*/
+class wxGenericAboutDialog
+{
+public:
+    /**
+        Default constructor, Create() must be called later.
+    */
+    wxGenericAboutDialog();
+
+    /**
+        Creates the dialog and initializes it with the given information.
+    */
+    wxGenericAboutDialog(const wxAboutDialogInfo& info, wxWindow* parent = NULL);
+
+    /**
+        Initializes the dialog created using the default constructor.
+    */
+    bool Create(const wxAboutDialogInfo& info, wxWindow* parent = NULL);
+
+protected:
+    /**
+        This virtual method may be overridden to add more controls to the
+        dialog.
+
+        Use the protected AddControl(), AddText() and AddCollapsiblePane()
+        methods to add custom controls.
+
+        This method is called during the dialog creation and you don't need to
+        call it, only to override it.
+    */
+    virtual void DoAddCustomControls() { }
+
+    /**
+        Add arbitrary control to the sizer content with the specified flags.
+
+        For example, here is how to add an expandable line with a border of 3
+        pixels, then a line of text:
+        @code
+        AddControl(new wxStaticLine(this), wxSizerFlags().Expand().Border(wxALL, 3));
+
+        AddText(_("This line is just an example of custom text."));
+        @endcode
+    */
+    void AddControl(wxWindow *win, const wxSizerFlags& flags);
+
+    /**
+        Add arbitrary control to the sizer content and centre it.
+    */
+    void AddControl(wxWindow *win);
+
+    /**
+        Add the given (not empty) text to the sizer content.
+    */
+    void AddText(const wxString& text);
+
+    /**
+        Add a wxCollapsiblePane containing the given text.
+    */
+    void AddCollapsiblePane(const wxString& title, const wxString& text);
+};
+
+/**
+    Show generic about dialog.
+
+    This function does the same thing as wxAboutBox() except that it always
+    uses the generic wxWidgets version of the dialog instead of the native one.
+*/
+void wxGenericAboutBox(const wxAboutDialogInfo& info, wxWindow* parent = NULL);