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/menuitem.h"
  43 #include "wx/log.h"
  44
  45 #include "wx/msw/private.h"
  46
  47 // ---------------------------------------------------------------------------
  48 // macro
  49 // ---------------------------------------------------------------------------
  50
  51 // hide the ugly cast
  52 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  53
  54 // conditional compilation
  55 #if wxUSE_OWNER_DRAWN
  56     #define OWNER_DRAWN_ONLY( code ) if ( IsOwnerDrawn() ) code
  57 #else // !wxUSE_OWNER_DRAWN
  58     #define OWNER_DRAWN_ONLY( code )
  59 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
  60
  61 // ============================================================================
  62 // implementation
  63 // ============================================================================
  64
  65 // ----------------------------------------------------------------------------
  66 // dynamic classes implementation
  67 // ----------------------------------------------------------------------------
  68
  69 #if     !defined(USE_SHARED_LIBRARY) || !USE_SHARED_LIBRARY
  70     #if wxUSE_OWNER_DRAWN
  71         IMPLEMENT_DYNAMIC_CLASS2(wxMenuItem, wxMenuItemBase, wxOwnerDrawn)
  72     #else   //!USE_OWNER_DRAWN
  73         IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxMenuItemBase)
  74     #endif  //USE_OWNER_DRAWN
  75 #endif  //USE_SHARED_LIBRARY
  76
  77 // ----------------------------------------------------------------------------
  78 // wxMenuItem
  79 // ----------------------------------------------------------------------------
  80
  81 // ctor & dtor
  82 // -----------
  83
  84 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
  85                        int id,
  86                        const wxString& text,
  87                        const wxString& strHelp,
  88                        bool bCheckable,
  89                        wxMenu *pSubMenu) :
  90 #if wxUSE_OWNER_DRAWN
  91                         wxOwnerDrawn(text, bCheckable)
  92 #endif // owner drawn
  93 {
  94     wxASSERT_MSG( pParentMenu != NULL, wxT("a menu item should have a parent") );
  95
  96 #if  wxUSE_OWNER_DRAWN
  97     // set default menu colors
  98     #define SYS_COLOR(c) (wxSystemSettings::GetSystemColour(wxSYS_COLOUR_##c))
  99
 100     SetTextColour(SYS_COLOR(MENUTEXT));
 101     SetBackgroundColour(SYS_COLOR(MENU));
 102
 103     // we don't want normal items be owner-drawn
 104     ResetOwnerDrawn();
 105
 106     #undef  SYS_COLOR
 107 #endif // wxUSE_OWNER_DRAWN
 108
 109     m_parentMenu  = pParentMenu;
 110     m_subMenu     = pSubMenu;
 111     m_isEnabled   = TRUE;
 112     m_isChecked   = FALSE;
 113     m_id          = id;
 114     m_text        = text;
 115     m_isCheckable = bCheckable;
 116     m_help        = strHelp;
 117 }
 118
 119 wxMenuItem::~wxMenuItem()
 120 {
 121 }
 122
 123 // misc
 124 // ----
 125
 126 // return the id for calling Win32 API functions
 127 int wxMenuItem::GetRealId() const
 128 {
 129     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 130 }
 131
 132 // delete the sub menu
 133 // -------------------
 134 void wxMenuItem::DeleteSubMenu()
 135 {
 136     delete m_subMenu;
 137     m_subMenu = NULL;
 138 }
 139
 140 // get item state
 141 // --------------
 142
 143 void wxMenuItem::IsChecked() const
 144 {
 145     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), id, MF_BYCOMMAND);
 146
 147     // don't "and" with MF_ENABLED because its value is 0
 148     return (flag & MF_DISABLED) == 0;
 149 }
 150
 151 // change item state
 152 // -----------------
 153
 154 void wxMenuItem::Enable(bool bDoEnable)
 155 {
 156     if ( m_isEnabled != bDoEnable ) {
 157         long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 158                                  GetRealId(),
 159                                  MF_BYCOMMAND |
 160                                  (bDoEnable ? MF_ENABLED : MF_GRAYED));
 161
 162         if ( rc == -1 ) {
 163             wxLogLastError("EnableMenuItem");
 164         }
 165
 166         wxMenuItemBase::Enable(m_isEnabled);
 167     }
 168 }
 169
 170 void wxMenuItem::Check(bool bDoCheck)
 171 {
 172     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 173
 174     if ( m_isChecked != bDoCheck ) {
 175         long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 176                                 GetId(),
 177                                 MF_BYCOMMAND |
 178                                 (bDoCheck ? MF_CHECKED : MF_UNCHECKED));
 179
 180         if ( rc == -1 ) {
 181             wxLogLastError("CheckMenuItem");
 182         }
 183
 184         wxMenuItemBase::Check(m_isChecked);
 185     }
 186 }
 187
 188 void wxMenuItem::SetText(const wxString& text)
 189 {
 190     // don't do anything if label didn't change
 191     if ( m_text == text )
 192         return;
 193
 194     wxMenuItemBase::SetText(text);
 195     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 196
 197     HMENU hMenu = GetHMenuOf(m_parentMenu);
 198
 199     UINT id = GetRealId();
 200     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 201     if ( flagsOld == 0xFFFFFFFF )
 202     {
 203         wxLogLastError("GetMenuState");
 204     }
 205     else
 206     {
 207         if ( IsSubMenu() )
 208         {
 209             // high byte contains the number of items in a submenu for submenus
 210             flagsOld &= 0xFF;
 211             flagsOld |= MF_POPUP;
 212         }
 213
 214         LPCTSTR data;
 215
 216 #if wxUSE_OWNER_DRAWN
 217         if ( IsOwnerDrawn() )
 218         {
 219             flagsOld |= MF_OWNERDRAW;
 220             data = (LPCTSTR)this;
 221         }
 222         else
 223 #endif  //owner drawn
 224         {
 225             flagsOld |= MF_STRING;
 226             data = (char*) text.c_str();
 227         }
 228
 229         if ( ::ModifyMenu(hMenu, id,
 230                           MF_BYCOMMAND | flagsOld,
 231                           id, data) == (int)0xFFFFFFFF )
 232         {
 233             wxLogLastError(wxT("ModifyMenu"));
 234         }
 235     }
 236 }
 237
 238 void wxMenuItem::SetCheckable(bool checkable)
 239 {
 240     wxMenuItemBase::SetCheckable(checkable);
 241     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 242 }
 243
 244 // ----------------------------------------------------------------------------
 245 // wxMenuItemBase
 246 // ----------------------------------------------------------------------------
 247
 248 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 249                                 int id,
 250                                 const wxString& name,
 251                                 const wxString& help,
 252                                 bool isCheckable,
 253                                 wxMenu *subMenu)
 254 {
 255     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 256 }