include/wx/msw/menu.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        menu.h
   3 // Purpose:     wxMenu, wxMenuBar classes
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin (wxMenuItem is now in separate file)
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_MENU_H_
  13 #define _WX_MENU_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "menu.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20 #include "wx/event.h"
  21
  22 class WXDLLEXPORT wxMenuItem;
  23 class WXDLLEXPORT wxMenuBar;
  24 class WXDLLEXPORT wxMenu;
  25 class WXDLLEXPORT wxFrame;
  26
  27 WXDLLEXPORT_DATA(extern const wxChar*) wxEmptyString;
  28
  29 // ----------------------------------------------------------------------------
  30 // Menu
  31 // ----------------------------------------------------------------------------
  32
  33 class WXDLLEXPORT wxMenu : public wxEvtHandler
  34 {
  35     DECLARE_DYNAMIC_CLASS(wxMenu)
  36
  37 public:
  38     // ctor & dtor
  39     wxMenu(const wxString& title = wxEmptyString, const wxFunction func = NULL);
  40     virtual ~wxMenu();
  41
  42     // construct menu
  43         // append a separator to the menu
  44     void AppendSeparator();
  45         // append a normal item to the menu
  46     void Append(int id, const wxString& label,
  47                 const wxString& helpString = wxEmptyString,
  48                 bool checkable = FALSE);
  49         // append a submenu
  50     void Append(int id, const wxString& label,
  51                 wxMenu *submenu,
  52                 const wxString& helpString = wxEmptyString);
  53         // append anything (create wxMenuItem first)
  54     void Append(wxMenuItem *pItem);
  55
  56         // insert a break in the menu
  57     void Break();
  58
  59         // delete an item
  60         // If it's a submenu, menu is not destroyed.
  61         // VZ: why? shouldn't it return "wxMenu *" then?
  62     void Delete(int id);
  63
  64     // client data
  65     void SetClientData(void* clientData) { m_clientData = clientData; }
  66     void* GetClientData() const { return m_clientData; }
  67
  68     // menu item control
  69         // enable/disable item
  70     void Enable(int id, bool enable);
  71         // TRUE if enabled
  72     bool IsEnabled(int id) const;
  73
  74         // check/uncheck item - only for checkable items, of course
  75     void Check(int id, bool check);
  76         // TRUE if checked
  77     bool IsChecked(int id) const;
  78
  79     // other properties
  80         // the menu title
  81     void SetTitle(const wxString& label);
  82     const wxString GetTitle() const;
  83         // the item label
  84     void SetLabel(int id, const wxString& label);
  85     wxString GetLabel(int id) const;
  86         // help string
  87     virtual void SetHelpString(int id, const wxString& helpString);
  88     virtual wxString GetHelpString(int id) const;
  89
  90         // get the list of items
  91     wxList& GetItems() const { return (wxList &)m_menuItems; }
  92
  93     // find item
  94         // returns id of the item matching the given string or wxNOT_FOUND
  95     virtual int FindItem(const wxString& itemString) const;
  96         // returns NULL if not found
  97     wxMenuItem* FindItem(int id) const { return FindItemForId(id); }
  98         // find wxMenuItem by ID, and item's menu too if itemMenu is !NULL
  99     wxMenuItem *FindItemForId(int itemId, wxMenu **itemMenu = NULL) const;
 100
 101     // Updates the UI for a menu and all submenus recursively. source is the
 102     // object that has the update event handlers defined for it. If NULL, the
 103     // menu or associated window will be used.
 104     void UpdateUI(wxEvtHandler* source = (wxEvtHandler*)NULL);
 105
 106     void ProcessCommand(wxCommandEvent& event);
 107
 108     virtual void SetParent(wxEvtHandler *parent) { m_parent = parent; }
 109     void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
 110     wxEvtHandler *GetEventHandler() const { return m_eventHandler; }
 111
 112 #ifdef WXWIN_COMPATIBILITY
 113     void Callback(const wxFunction func) { m_callback = func; }
 114
 115     // compatibility: these functions are deprecated
 116     bool Enabled(int id) const { return IsEnabled(id); }
 117     bool Checked(int id) const { return IsChecked(id); }
 118 #endif // WXWIN_COMPATIBILITY
 119
 120     // IMPLEMENTATION
 121     bool MSWCommand(WXUINT param, WXWORD id);
 122
 123     void SetInvokingWindow(wxWindow *pWin) { m_pInvokingWindow = pWin; }
 124     wxWindow *GetInvokingWindow() const { return m_pInvokingWindow; }
 125
 126     // semi-private accessors
 127         // get the window which contains this menu
 128     wxWindow *GetWindow() const;
 129         // get the menu handle
 130     WXHMENU GetHMenu() const;
 131
 132     // only for wxMenuBar
 133     void Attach(wxMenuBar *menubar);
 134     void Detach();
 135
 136 private:
 137     bool              m_doBreak;
 138
 139     // This is used when m_hMenu is NULL because we don't want to
 140     // delete it in ~wxMenu (it's been added to a parent menu).
 141     // But we'll still need the handle for other purposes.
 142     // Might be better to have a flag saying whether it's deleteable or not.
 143     WXHMENU           m_savehMenu ; // Used for Enable() on popup
 144     WXHMENU           m_hMenu;
 145     wxFunction        m_callback;
 146
 147     int               m_noItems;
 148     wxString          m_title;
 149     wxMenu *          m_topLevelMenu;
 150     wxMenuBar *       m_menuBar;
 151     wxList            m_menuItems;
 152     wxEvtHandler *    m_parent;
 153     wxEvtHandler *    m_eventHandler;
 154     wxWindow         *m_pInvokingWindow;
 155     void*             m_clientData;
 156 };
 157
 158 // ----------------------------------------------------------------------------
 159 // Menu Bar (a la Windows)
 160 // ----------------------------------------------------------------------------
 161
 162 class WXDLLEXPORT wxMenuBar : public wxEvtHandler
 163 {
 164     DECLARE_DYNAMIC_CLASS(wxMenuBar)
 165
 166 public:
 167     // ctors & dtor
 168         // default constructor
 169     wxMenuBar();
 170         // unused under MSW
 171     wxMenuBar(long style);
 172         // menubar takes ownership of the menus arrays but copies the titles
 173     wxMenuBar(int n, wxMenu *menus[], const wxString titles[]);
 174     virtual ~wxMenuBar();
 175
 176     // menubar construction
 177     WXHMENU Create();
 178     void Append(wxMenu *menu, const wxString& title);
 179     virtual void Delete(wxMenu *menu, int index = 0); /* Menu not destroyed */
 180
 181     // state control
 182     // NB: must only be used AFTER menu has been attached to frame,
 183     //     otherwise use individual menus to enable/disable items
 184         // enable the item
 185     void Enable(int id, bool enable);
 186         // TRUE if item enabled
 187     bool IsEnabled(int id) const;
 188         //
 189     void EnableTop(int pos, bool enable);
 190
 191         // works only with checkable items
 192     void Check(int id, bool check);
 193         // TRUE if checked
 194     bool IsChecked(int id) const;
 195
 196     void SetLabel(int id, const wxString& label) ;
 197     wxString GetLabel(int id) const ;
 198
 199     virtual void SetHelpString(int id, const wxString& helpString);
 200     virtual wxString GetHelpString(int id) const ;
 201
 202     void SetLabelTop(int pos, const wxString& label) ;
 203     wxString GetLabelTop(int pos) const ;
 204
 205     // notifications: return FALSE to prevent the menu from being
 206     // appended/deleted
 207     virtual bool OnAppend(wxMenu *menu, const char *title);
 208     virtual bool OnDelete(wxMenu *menu, int index);
 209
 210     // item search
 211         // by menu and item names, returns wxNOT_FOUND if not found
 212     virtual int FindMenuItem(const wxString& menuString,
 213                              const wxString& itemString) const;
 214         // returns NULL if not found
 215     wxMenuItem* FindItem(int id) const { return FindItemForId(id); }
 216         // returns NULL if not found, fills menuForItem if !NULL
 217     wxMenuItem *FindItemForId(int itemId, wxMenu **menuForItem = NULL) const;
 218
 219     // submenus access
 220     int GetMenuCount() const { return m_menuCount; }
 221     wxMenu *GetMenu(int i) const { return m_menus[i]; }
 222
 223     void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
 224     wxEvtHandler *GetEventHandler() { return m_eventHandler; }
 225
 226 #ifdef WXWIN_COMPATIBILITY
 227     // compatibility: these functions are deprecated
 228     bool Enabled(int id) const { return IsEnabled(id); }
 229     bool Checked(int id) const { return IsChecked(id); }
 230 #endif // WXWIN_COMPATIBILITY
 231
 232     // IMPLEMENTATION
 233         // returns TRUE if we're attached to a frame
 234     bool IsAttached() const { return m_menuBarFrame != NULL; }
 235         // get the frame we live in
 236     wxFrame *GetFrame() const { return m_menuBarFrame; }
 237         // attach to a frame
 238     void Attach(wxFrame *frame)
 239     {
 240         wxASSERT_MSG( !m_menuBarFrame, _T("menubar already attached!") );
 241
 242         m_menuBarFrame = frame;
 243     }
 244         // get the menu handle
 245     WXHMENU GetHMenu() const { return m_hMenu; }
 246
 247 protected:
 248     // common part of all ctors
 249     void Init();
 250
 251     // if the menubar is modified, the display is not updated automatically,
 252     // call this function to update it (m_menuBarFrame should be !NULL)
 253     void Refresh();
 254
 255     wxEvtHandler *m_eventHandler;
 256     int           m_menuCount;
 257     wxMenu      **m_menus;
 258     wxString     *m_titles;
 259     wxFrame      *m_menuBarFrame;
 260     WXHMENU       m_hMenu;
 261 };
 262
 263 #endif // _WX_MENU_H_