/////////////////////////////////////////////////////////////////////////////
// Name:        menu.h
// Purpose:     wxMenu, wxMenuBar classes
// Author:      Julian Smart
// Modified by:
// Created:     17/09/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_MENU_H_
#define _WX_MENU_H_

#ifdef __GNUG__
#pragma interface "menu.h"
#endif

#include "wx/defs.h"
#include "wx/event.h"
#include "wx/font.h"
#include "wx/gdicmn.h"

class WXDLLEXPORT wxMenuItem;
class WXDLLEXPORT wxMenuBar;
class WXDLLEXPORT wxMenu;

WXDLLEXPORT_DATA(extern const char*) wxEmptyString;

// ----------------------------------------------------------------------------
// Menu
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxMenu: public wxEvtHandler
{
  DECLARE_DYNAMIC_CLASS(wxMenu)

public:
  // ctor & dtor
#ifdef WXWIN_COMPATIBILITY
    wxMenu( const wxString& title, const wxFunction func)
    {
        Init(title, 0, func);
    }
#endif // WXWIN_COMPATIBILITY
    wxMenu( const wxString& title = wxEmptyString, long style = 0 )
    {
        Init(title, style);
    }
  virtual ~wxMenu();

  // construct menu
    // append items to the menu
      // separator line
  void AppendSeparator();
      // normal item
  void Append(int id, const wxString& Label, const wxString& helpString = wxEmptyString,
              bool checkable = FALSE);
      // a submenu
  void Append(int id, const wxString& Label, wxMenu *SubMenu,
              const wxString& helpString = wxEmptyString);
      // the most generic form (create wxMenuItem first and use it's functions)
  void Append(wxMenuItem *pItem);
    // insert a break in the menu
  void Break();
    // delete an item
  void Delete(int id);

  // menu item control
  void Enable(int id, bool Flag);
  bool Enabled(int id) const;
  bool IsEnabled(int id) const { return Enabled(id); };
  void Check(int id, bool Flag);
  bool Checked(int id) const;
  bool IsChecked(int id) const { return IsChecked(id); };

  // Client data
  void SetClientData(void* clientData) { m_clientData = clientData; }
  void* GetClientData() const { return m_clientData; }

  // item properties
    // title
  void SetTitle(const wxString& label);
  const wxString GetTitle() const;
    // label
  void SetLabel(int id, const wxString& label);
  wxString GetLabel(int id) const;
    // help string
  virtual void SetHelpString(int id, const wxString& helpString);
  virtual wxString GetHelpString(int id) const ;

  // find item
    // Finds the item id matching the given string, -1 if not found.
  virtual int FindItem(const wxString& itemString) const ;
    // Find wxMenuItem by ID, and item's menu too if itemMenu is !NULL.
  wxMenuItem *FindItemForId(int itemId, wxMenu **itemMenu = NULL) const;

  // Updates the UI for a menu and all submenus recursively.
  // source is the object that has the update event handlers
  // defined for it. If NULL, the menu or associated window
  // will be used.
  void UpdateUI(wxEvtHandler* source = (wxEvtHandler*) NULL);

  void ProcessCommand(wxCommandEvent& event);

#ifdef WXWIN_COMPATIBILITY
  void Callback(const wxFunction func) { m_callback = func; }
#endif // WXWIN_COMPATIBILITY

  virtual void SetParent(wxEvtHandler *parent) { m_parent = parent; }
  void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
  wxEvtHandler *GetEventHandler() { return m_eventHandler; }

  wxList& GetItems() const { return (wxList&) m_menuItems; }

  void      SetInvokingWindow(wxWindow *pWin) { m_pInvokingWindow = pWin; }
  wxWindow *GetInvokingWindow()         const { return m_pInvokingWindow; }

  //// Motif-specific
  WXWidget GetButtonWidget() const { return m_buttonWidget; }
  void SetButtonWidget(WXWidget buttonWidget) { m_buttonWidget = buttonWidget; }
  WXWidget GetMainWidget() const { return m_menuWidget; }
  wxMenu* GetParent() const { return m_menuParent; }
  int GetId() const { return m_menuId; }
  void SetId(int id) { m_menuId = id; }
  void SetMenuBar(wxMenuBar* menuBar) { m_menuBar = menuBar; }
  wxMenuBar* GetMenuBar() const { return m_menuBar; }

  void CreatePopup (WXWidget logicalParent, int x, int y);
  void DestroyPopup (void);
  void ShowPopup (int x, int y);
  void HidePopup (void);

  WXWidget CreateMenu(wxMenuBar *menuBar, WXWidget parent, wxMenu *topMenu,
            const wxString& title = "", bool isPulldown = FALSE);

  // For popups, need to destroy, then recreate menu for a different (or
  // possibly same) window, since the parent may change.
  void DestroyMenu(bool full);
  WXWidget FindMenuItem(int id, wxMenuItem **it = NULL) const;

  const wxColour& GetBackgroundColour() const { return m_backgroundColour; }
  const wxColour& GetForegroundColour() const { return m_foregroundColour; }
  const wxFont& GetFont() const { return m_font; }

  void SetBackgroundColour(const wxColour& colour);
  void SetForegroundColour(const wxColour& colour);
  void SetFont(const wxFont& colour);
  void ChangeFont(bool keepOriginalSize = FALSE);

  // implementation from now on
  WXWidget GetHandle() const { return m_menuWidget; }
  bool IsTearOff() const { return (m_style & wxMENU_TEAROFF) != 0; }

public:
#ifdef WXWIN_COMPATIBILITY
  wxFunction        m_callback;
#endif // WXWIN_COMPATIBILITY

  int               m_noItems;
  wxString          m_title;
  wxMenuBar *       m_menuBar;
  wxList            m_menuItems;
  wxEvtHandler *    m_parent;
  wxEvtHandler *    m_eventHandler;
  void*             m_clientData;
  wxWindow*         m_pInvokingWindow;

  long              m_style;

  //// Motif-specific
  int               m_numColumns;
  WXWidget          m_menuWidget;
  WXWidget          m_popupShell;   // For holding the popup shell widget
  WXWidget          m_buttonWidget; // The actual string, so we can grey it etc.
  int               m_menuId;
  wxMenu*           m_topLevelMenu ;
  wxMenu*           m_menuParent;
  bool              m_ownedByMenuBar;
  wxColour          m_foregroundColour;
  wxColour          m_backgroundColour;
  wxFont            m_font;

private:
    // common code for both constructors:
    void Init( const wxString& title,
               long style
#ifdef WXWIN_COMPATIBILITY
               , const wxFunction func = (wxFunction) NULL
#endif
               );
};

// ----------------------------------------------------------------------------
// Menu Bar (a la Windows)
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxFrame;
class WXDLLEXPORT wxMenuBar : public wxEvtHandler
{
DECLARE_DYNAMIC_CLASS(wxMenuBar)

public:
    wxMenuBar( long style );
    wxMenuBar();
    wxMenuBar(int n, wxMenu *menus[], const wxString titles[]);
    ~wxMenuBar();

    void Append(wxMenu *menu, const wxString& title);
    // Must only be used AFTER menu has been attached to frame,
    // otherwise use individual menus to enable/disable items
    void Enable(int Id, bool Flag);
    bool Enabled(int Id) const ;
    bool IsEnabled(int Id) const { return Enabled(Id); };
    void EnableTop(int pos, bool Flag);
    void Check(int id, bool Flag);
    bool Checked(int id) const ;
    bool IsChecked(int Id) const { return Checked(Id); };
    void SetLabel(int id, const wxString& label) ;
    wxString GetLabel(int id) const ;
    void SetLabelTop(int pos, const wxString& label) ;
    wxString GetLabelTop(int pos) const ;
    virtual void Delete(wxMenu *menu, int index = 0); /* Menu not destroyed */
    virtual bool OnAppend(wxMenu *menu, const char *title);
    virtual bool OnDelete(wxMenu *menu, int index);

    virtual void SetHelpString(int Id, const wxString& helpString);
    virtual wxString GetHelpString(int Id) const ;

    virtual int FindMenuItem(const wxString& menuString, const wxString& itemString) const ;

    // Find wxMenuItem for item ID, and return item's
    // menu too if itemMenu is non-NULL.
    wxMenuItem *FindItemForId(int itemId, wxMenu **menuForItem = NULL) const ;

    void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
    wxEvtHandler *GetEventHandler() { return m_eventHandler; }

    int GetMenuCount() const { return m_menuCount; }
    wxMenu* GetMenu(int i) const { return m_menus[i]; }

    //// Motif-specific
    wxFrame* GetMenuBarFrame() const { return m_menuBarFrame; }
    void SetMenuBarFrame(wxFrame* frame) { m_menuBarFrame = frame; }
    WXWidget GetMainWidget() const { return m_mainWidget; }
    void SetMainWidget(WXWidget widget) { m_mainWidget = widget; }

    // Create menubar
    bool CreateMenuBar(wxFrame* frame);

    // Destroy menubar, but keep data structures intact so we can recreate it.
    bool DestroyMenuBar();

    const wxColour& GetBackgroundColour() const { return m_backgroundColour; }
    const wxColour& GetForegroundColour() const { return m_foregroundColour; }
    const wxFont& GetFont() const { return m_font; }

    void SetBackgroundColour(const wxColour& colour);
    void SetForegroundColour(const wxColour& colour);
    void SetFont(const wxFont& colour);
    void ChangeFont(bool keepOriginalSize = FALSE);

public:
    wxEvtHandler *            m_eventHandler;
    int                       m_menuCount;
    wxMenu **                 m_menus;
    wxString *                m_titles;
    wxFrame *                 m_menuBarFrame;

    //// Motif-specific
    WXWidget                  m_mainWidget;

    wxColour                  m_foregroundColour;
    wxColour                  m_backgroundColour;
    wxFont                    m_font;
};

#endif // _WX_MENU_H_