src/msw/menuitem.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        menuitem.cpp
   3 // Purpose:     wxMenuItem implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     11.11.97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "menuitem.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/font.h"
  33     #include "wx/bitmap.h"
  34     #include "wx/settings.h"
  35     #include "wx/font.h"
  36     #include "wx/window.h"
  37     #include "wx/accel.h"
  38     #include "wx/menu.h"
  39     #include "wx/string.h"
  40 #endif
  41
  42 #include "wx/ownerdrw.h"
  43 #include "wx/menuitem.h"
  44 #include "wx/log.h"
  45
  46 #include "wx/msw/private.h"
  47
  48 // ---------------------------------------------------------------------------
  49 // convenience macro
  50 // ---------------------------------------------------------------------------
  51
  52 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  53
  54 // ============================================================================
  55 // implementation
  56 // ============================================================================
  57
  58 // ----------------------------------------------------------------------------
  59 // dynamic classes implementation
  60 // ----------------------------------------------------------------------------
  61
  62 #if     !defined(USE_SHARED_LIBRARY) || !USE_SHARED_LIBRARY
  63 #if wxUSE_OWNER_DRAWN
  64   IMPLEMENT_DYNAMIC_CLASS2(wxMenuItem, wxObject, wxOwnerDrawn)
  65 #else   //!USE_OWNER_DRAWN
  66   IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxObject)
  67 #endif  //USE_OWNER_DRAWN
  68
  69 #endif  //USE_SHARED_LIBRARY
  70
  71 // ----------------------------------------------------------------------------
  72 // wxMenuItem
  73 // ----------------------------------------------------------------------------
  74
  75 // ctor & dtor
  76 // -----------
  77
  78 wxMenuItem::wxMenuItem(wxMenu *pParentMenu, int id,
  79                        const wxString& strName, const wxString& strHelp,
  80                        bool bCheckable,
  81                        wxMenu *pSubMenu) :
  82 #if wxUSE_OWNER_DRAWN
  83                         wxOwnerDrawn(strName, bCheckable),
  84 #else   //no owner drawn support
  85                         m_bCheckable(bCheckable),
  86                         m_strName(strName),
  87 #endif  //owner drawn
  88                         m_strHelp(strHelp)
  89 {
  90     wxASSERT_MSG( pParentMenu != NULL, _T("a menu item should have a parent") );
  91
  92 #if  wxUSE_OWNER_DRAWN
  93     // set default menu colors
  94     #define SYS_COLOR(c) (wxSystemSettings::GetSystemColour(wxSYS_COLOUR_##c))
  95
  96     SetTextColour(SYS_COLOR(MENUTEXT));
  97     SetBackgroundColour(SYS_COLOR(MENU));
  98
  99     // we don't want normal items be owner-drawn
 100     ResetOwnerDrawn();
 101
 102     #undef  SYS_COLOR
 103 #endif
 104
 105     m_pParentMenu = pParentMenu;
 106     m_pSubMenu    = pSubMenu;
 107     m_bEnabled    = TRUE;
 108     m_bChecked    = FALSE;
 109     m_idItem      = id;
 110 }
 111
 112 wxMenuItem::~wxMenuItem()
 113 {
 114 }
 115
 116 // misc
 117 // ----
 118
 119 // return the id for calling Win32 API functions
 120 int wxMenuItem::GetRealId() const
 121 {
 122     return m_pSubMenu ? (int)m_pSubMenu->GetHMenu() : GetId();
 123 }
 124
 125 // delete the sub menu
 126 // -------------------
 127 void wxMenuItem::DeleteSubMenu()
 128 {
 129     delete m_pSubMenu;
 130     m_pSubMenu = NULL;
 131 }
 132
 133 // change item state
 134 // -----------------
 135
 136 void wxMenuItem::Enable(bool bDoEnable)
 137 {
 138     if ( m_bEnabled != bDoEnable ) {
 139         long rc = EnableMenuItem(GetHMenuOf(m_pParentMenu),
 140                                  GetRealId(),
 141                                  MF_BYCOMMAND |
 142                                  (bDoEnable ? MF_ENABLED : MF_GRAYED));
 143
 144         if ( rc == -1 ) {
 145             wxLogLastError("EnableMenuItem");
 146         }
 147
 148         m_bEnabled = bDoEnable;
 149     }
 150 }
 151
 152 void wxMenuItem::Check(bool bDoCheck)
 153 {
 154     wxCHECK_RET( IsCheckable(), _T("only checkable items may be checked") );
 155
 156     if ( m_bChecked != bDoCheck ) {
 157         long rc = CheckMenuItem(GetHMenuOf(m_pParentMenu),
 158                                 GetId(),
 159                                 MF_BYCOMMAND |
 160                                 (bDoCheck ? MF_CHECKED : MF_UNCHECKED));
 161
 162         if ( rc == -1 ) {
 163             wxLogLastError("CheckMenuItem");
 164         }
 165
 166         m_bChecked = bDoCheck;
 167     }
 168 }
 169
 170 void wxMenuItem::SetName(const wxString& strName)
 171 {
 172     // don't do anything if label didn't change
 173     if ( m_strName == strName )
 174         return;
 175
 176     m_strName = strName;
 177
 178     HMENU hMenu = GetHMenuOf(m_pParentMenu);
 179
 180     UINT id = GetRealId();
 181     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 182     if ( flagsOld == 0xFFFFFFFF )
 183     {
 184         wxLogLastError("GetMenuState");
 185     }
 186     else
 187     {
 188         if ( IsSubMenu() )
 189         {
 190             // high byte contains the number of items in a submenu for submenus
 191             flagsOld &= 0xFF;
 192             flagsOld |= MF_POPUP;
 193         }
 194
 195         LPCTSTR data;
 196 #if wxUSE_OWNER_DRAWN
 197         if ( IsOwnerDrawn() )
 198         {
 199             flagsOld |= MF_OWNERDRAW;
 200             data = (LPCTSTR)this;
 201         }
 202         else
 203 #endif  //owner drawn
 204         {
 205             flagsOld |= MF_STRING;
 206             data = strName;
 207         }
 208
 209         if ( ::ModifyMenu(hMenu, id,
 210                           MF_BYCOMMAND | flagsOld,
 211                           id, data) == 0xFFFFFFFF )
 212         {
 213             wxLogLastError(_T("ModifyMenu"));
 214         }
 215     }
 216 }
 217