/////////////////////////////////////////////////////////////////////////////
// Name:        bookctrl.h
// Purpose:     interface of wxBookCtrlBase
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxBookCtrlBase

    @todo Document this class.

    @library{wxcore}
    @category{miscwnd}

    @see @ref overview_bookctrl
*/
class wxBookCtrlBase : public wxControl
{
public:

};


/**
    @class wxBookCtrlEvent

    This class represents the events generated by book controls (wxNotebook,
    wxListbook, wxChoicebook, wxTreebook).
    The PAGE_CHANGING events are sent before the current page is changed.
    It allows the program to examine the current page (which can be retrieved
    with wxBookCtrlEvent::GetOldSelection) and to veto the page change by calling
    wxNotifyEvent::Veto if, for example, the current values in the controls
    of the old page are invalid.

    The PAGE_CHANGED events are sent after the page has been changed and
    the program cannot veto it any more, it just informs it about the page
    change.

    To summarize, if the program is interested in validating the page values
    before allowing the user to change it, it should process the PAGE_CHANGING
    event, otherwise PAGE_CHANGED is probably enough. In any case, it is
    probably unnecessary to process both events at once.

    @library{wxcore}
    @category{events}

    @see wxNotebook, wxListbook, wxChoicebook, wxTreebook
*/

class wxBookCtrlEvent : public wxNotifyEvent
{
public:
    /**
        Constructor (used internally by wxWidgets only).
    */
    wxBookCtrlEvent(wxEventType eventType = wxEVT_NULL, int id = 0,
                int sel = wxNOT_FOUND, int oldSel = wxNOT_FOUND);

    /**
        Returns the page that was selected before the change, @c wxNOT_FOUND if
        none was selected.
    */
    int GetOldSelection() const;

    /**
        Returns the currently selected page, or @c wxNOT_FOUND if none was
        selected.
        @note under Windows, GetSelection() will return the same value as
        GetOldSelection() when called from @c EVT_NOTEBOOK_PAGE_CHANGING
        handler and not the page which is going to be selected.
    */
    int GetSelection() const;

    /**
        Sets the id of the page selected before the change.
    */
    void SetOldSelection(int page);

    /**
        Sets the selection member variable.
    */
    void SetSelection(int page);
};