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 #if wxUSE_ACCEL
  46     #include "wx/accel.h"
  47 #endif // wxUSE_ACCEL
  48
  49 #include "wx/msw/private.h"
  50
  51 // ---------------------------------------------------------------------------
  52 // macro
  53 // ---------------------------------------------------------------------------
  54
  55 // hide the ugly cast
  56 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  57
  58 // conditional compilation
  59 #if wxUSE_OWNER_DRAWN
  60     #define OWNER_DRAWN_ONLY( code ) if ( IsOwnerDrawn() ) code
  61 #else // !wxUSE_OWNER_DRAWN
  62     #define OWNER_DRAWN_ONLY( code )
  63 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
  64
  65 // ============================================================================
  66 // implementation
  67 // ============================================================================
  68
  69 // ----------------------------------------------------------------------------
  70 // dynamic classes implementation
  71 // ----------------------------------------------------------------------------
  72
  73 #if     !defined(USE_SHARED_LIBRARY) || !USE_SHARED_LIBRARY
  74     #if wxUSE_OWNER_DRAWN
  75         IMPLEMENT_DYNAMIC_CLASS2(wxMenuItem, wxMenuItemBase, wxOwnerDrawn)
  76     #else   //!USE_OWNER_DRAWN
  77         IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxMenuItemBase)
  78     #endif  //USE_OWNER_DRAWN
  79 #endif  //USE_SHARED_LIBRARY
  80
  81 // ----------------------------------------------------------------------------
  82 // wxMenuItem
  83 // ----------------------------------------------------------------------------
  84
  85 // ctor & dtor
  86 // -----------
  87
  88 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
  89                        int id,
  90                        const wxString& text,
  91                        const wxString& strHelp,
  92                        bool bCheckable,
  93                        wxMenu *pSubMenu) :
  94 #if wxUSE_OWNER_DRAWN
  95                         wxOwnerDrawn(text, bCheckable)
  96 #endif // owner drawn
  97 {
  98     wxASSERT_MSG( pParentMenu != NULL, wxT("a menu item should have a parent") );
  99
 100 #if  wxUSE_OWNER_DRAWN
 101     // set default menu colors
 102     #define SYS_COLOR(c) (wxSystemSettings::GetSystemColour(wxSYS_COLOUR_##c))
 103
 104     SetTextColour(SYS_COLOR(MENUTEXT));
 105     SetBackgroundColour(SYS_COLOR(MENU));
 106
 107     // we don't want normal items be owner-drawn
 108     ResetOwnerDrawn();
 109
 110     #undef  SYS_COLOR
 111 #endif // wxUSE_OWNER_DRAWN
 112
 113     m_parentMenu  = pParentMenu;
 114     m_subMenu     = pSubMenu;
 115     m_isEnabled   = TRUE;
 116     m_isChecked   = FALSE;
 117     m_id          = id;
 118     m_text        = text;
 119     m_isCheckable = bCheckable;
 120     m_help        = strHelp;
 121 }
 122
 123 wxMenuItem::~wxMenuItem()
 124 {
 125 }
 126
 127 // misc
 128 // ----
 129
 130 // return the id for calling Win32 API functions
 131 int wxMenuItem::GetRealId() const
 132 {
 133     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 134 }
 135
 136 // get item state
 137 // --------------
 138
 139 bool wxMenuItem::IsChecked() const
 140 {
 141     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 142
 143     return (flag & MF_CHECKED) != 0;
 144 }
 145
 146 wxString wxMenuItem::GetLabel() const
 147 {
 148     return wxStripMenuCodes(m_text);
 149 }
 150
 151 // accelerators
 152 // ------------
 153
 154 #if wxUSE_ACCEL
 155
 156 wxAcceleratorEntry *wxMenuItem::GetAccel() const
 157 {
 158     return wxGetAccelFromString(GetText());
 159 }
 160
 161 #endif // wxUSE_ACCEL
 162
 163 // change item state
 164 // -----------------
 165
 166 void wxMenuItem::Enable(bool enable)
 167 {
 168     if ( m_isEnabled == enable )
 169         return;
 170
 171     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 172                              GetRealId(),
 173                              MF_BYCOMMAND |
 174                              (enable ? MF_ENABLED : MF_GRAYED));
 175
 176     if ( rc == -1 ) {
 177         wxLogLastError("EnableMenuItem");
 178     }
 179
 180     wxMenuItemBase::Enable(enable);
 181 }
 182
 183 void wxMenuItem::Check(bool check)
 184 {
 185     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 186
 187     if ( m_isChecked == check )
 188         return;
 189
 190     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 191                             GetRealId(),
 192                             MF_BYCOMMAND |
 193                             (check ? MF_CHECKED : MF_UNCHECKED));
 194
 195     if ( rc == -1 ) {
 196         wxLogLastError("CheckMenuItem");
 197     }
 198
 199     wxMenuItemBase::Check(check);
 200 }
 201
 202 void wxMenuItem::SetText(const wxString& text)
 203 {
 204     // don't do anything if label didn't change
 205     if ( m_text == text )
 206         return;
 207
 208     wxMenuItemBase::SetText(text);
 209     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 210
 211     HMENU hMenu = GetHMenuOf(m_parentMenu);
 212     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 213
 214 #if wxUSE_ACCEL
 215     m_parentMenu->UpdateAccel(this);
 216 #endif // wxUSE_ACCEL
 217
 218     UINT id = GetRealId();
 219     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 220     if ( flagsOld == 0xFFFFFFFF )
 221     {
 222         wxLogLastError("GetMenuState");
 223     }
 224     else
 225     {
 226         if ( IsSubMenu() )
 227         {
 228             // high byte contains the number of items in a submenu for submenus
 229             flagsOld &= 0xFF;
 230             flagsOld |= MF_POPUP;
 231         }
 232
 233         LPCTSTR data;
 234
 235 #if wxUSE_OWNER_DRAWN
 236         if ( IsOwnerDrawn() )
 237         {
 238             flagsOld |= MF_OWNERDRAW;
 239             data = (LPCTSTR)this;
 240         }
 241         else
 242 #endif  //owner drawn
 243         {
 244             flagsOld |= MF_STRING;
 245             data = (char*) text.c_str();
 246         }
 247
 248         if ( ::ModifyMenu(hMenu, id,
 249                           MF_BYCOMMAND | flagsOld,
 250                           id, data) == (int)0xFFFFFFFF )
 251         {
 252             wxLogLastError(wxT("ModifyMenu"));
 253         }
 254     }
 255 }
 256
 257 void wxMenuItem::SetCheckable(bool checkable)
 258 {
 259     wxMenuItemBase::SetCheckable(checkable);
 260     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 261 }
 262
 263 // ----------------------------------------------------------------------------
 264 // wxMenuItemBase
 265 // ----------------------------------------------------------------------------
 266
 267 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 268                                 int id,
 269                                 const wxString& name,
 270                                 const wxString& help,
 271                                 bool isCheckable,
 272                                 wxMenu *subMenu)
 273 {
 274     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 275 }