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 licence
  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 #if wxUSE_MENUS
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/font.h"
  35     #include "wx/bitmap.h"
  36     #include "wx/settings.h"
  37     #include "wx/font.h"
  38     #include "wx/window.h"
  39     #include "wx/accel.h"
  40     #include "wx/menu.h"
  41     #include "wx/string.h"
  42 #endif
  43
  44 #include "wx/menuitem.h"
  45 #include "wx/log.h"
  46
  47 #if wxUSE_ACCEL
  48     #include "wx/accel.h"
  49 #endif // wxUSE_ACCEL
  50
  51 #include "wx/msw/private.h"
  52
  53 #ifdef __WXWINCE__
  54 // Implemented in menu.cpp
  55 UINT GetMenuState(HMENU hMenu, UINT id, UINT flags) ;
  56 #endif
  57
  58 // ---------------------------------------------------------------------------
  59 // macro
  60 // ---------------------------------------------------------------------------
  61
  62 // hide the ugly cast
  63 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  64
  65 // conditional compilation
  66 #if wxUSE_OWNER_DRAWN
  67     #define OWNER_DRAWN_ONLY( code ) if ( IsOwnerDrawn() ) code
  68 #else // !wxUSE_OWNER_DRAWN
  69     #define OWNER_DRAWN_ONLY( code )
  70 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
  71
  72 // ============================================================================
  73 // implementation
  74 // ============================================================================
  75
  76 // ----------------------------------------------------------------------------
  77 // dynamic classes implementation
  78 // ----------------------------------------------------------------------------
  79
  80 IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxObject)
  81
  82 // ----------------------------------------------------------------------------
  83 // wxMenuItem
  84 // ----------------------------------------------------------------------------
  85
  86 // ctor & dtor
  87 // -----------
  88
  89 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
  90                        int id,
  91                        const wxString& text,
  92                        const wxString& strHelp,
  93                        wxItemKind kind,
  94                        wxMenu *pSubMenu)
  95           : wxMenuItemBase(pParentMenu, id, text, strHelp, kind, pSubMenu)
  96 #if wxUSE_OWNER_DRAWN
  97             , wxOwnerDrawn(text, kind == wxITEM_CHECK)
  98 #endif // owner drawn
  99 {
 100     Init();
 101 }
 102
 103 wxMenuItem::wxMenuItem(wxMenu *parentMenu,
 104                        int id,
 105                        const wxString& text,
 106                        const wxString& help,
 107                        bool isCheckable,
 108                        wxMenu *subMenu)
 109           : wxMenuItemBase(parentMenu, id, text, help,
 110                            isCheckable ? wxITEM_CHECK : wxITEM_NORMAL, subMenu)
 111 #if wxUSE_OWNER_DRAWN
 112            , wxOwnerDrawn(text, isCheckable, true)
 113 #endif // owner drawn
 114 {
 115     Init();
 116 }
 117
 118 void wxMenuItem::Init()
 119 {
 120     m_radioGroup.start = -1;
 121     m_isRadioGroupStart = FALSE;
 122
 123 #if  wxUSE_OWNER_DRAWN
 124     // set default menu colors
 125     #define SYS_COLOR(c) (wxSystemSettings::GetColour(wxSYS_COLOUR_##c))
 126
 127     SetTextColour(SYS_COLOR(MENUTEXT));
 128     SetBackgroundColour(SYS_COLOR(MENU));
 129
 130     #undef  SYS_COLOR
 131
 132     // we don't want normal items be owner-drawn
 133     ResetOwnerDrawn();
 134
 135     // tell the owner drawing code to to show the accel string as well
 136     SetAccelString(m_text.AfterFirst(_T('\t')));
 137 #endif // wxUSE_OWNER_DRAWN
 138 }
 139
 140 wxMenuItem::~wxMenuItem()
 141 {
 142 }
 143
 144 // misc
 145 // ----
 146
 147 // return the id for calling Win32 API functions
 148 int wxMenuItem::GetRealId() const
 149 {
 150     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 151 }
 152
 153 // get item state
 154 // --------------
 155
 156 bool wxMenuItem::IsChecked() const
 157 {
 158     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 159
 160     return (flag & MF_CHECKED) != 0;
 161 }
 162
 163 /* static */
 164 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 165 {
 166     return wxStripMenuCodes(text);
 167 }
 168
 169 // radio group stuff
 170 // -----------------
 171
 172 void wxMenuItem::SetAsRadioGroupStart()
 173 {
 174     m_isRadioGroupStart = TRUE;
 175 }
 176
 177 void wxMenuItem::SetRadioGroupStart(int start)
 178 {
 179     wxASSERT_MSG( !m_isRadioGroupStart,
 180                   _T("should only be called for the next radio items") );
 181
 182     m_radioGroup.start = start;
 183 }
 184
 185 void wxMenuItem::SetRadioGroupEnd(int end)
 186 {
 187     wxASSERT_MSG( m_isRadioGroupStart,
 188                   _T("should only be called for the first radio item") );
 189
 190     m_radioGroup.end = end;
 191 }
 192
 193 // change item state
 194 // -----------------
 195
 196 void wxMenuItem::Enable(bool enable)
 197 {
 198     if ( m_isEnabled == enable )
 199         return;
 200
 201     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 202                              GetRealId(),
 203                              MF_BYCOMMAND |
 204                              (enable ? MF_ENABLED : MF_GRAYED));
 205
 206     if ( rc == -1 ) {
 207         wxLogLastError(wxT("EnableMenuItem"));
 208     }
 209
 210     wxMenuItemBase::Enable(enable);
 211 }
 212
 213 void wxMenuItem::Check(bool check)
 214 {
 215     wxCHECK_RET( IsCheckable(), wxT("only checkable items may be checked") );
 216
 217     if ( m_isChecked == check )
 218         return;
 219
 220     int flags = check ? MF_CHECKED : MF_UNCHECKED;
 221     HMENU hmenu = GetHMenuOf(m_parentMenu);
 222
 223     if ( GetKind() == wxITEM_RADIO )
 224     {
 225         // it doesn't make sense to uncheck a radio item - what would this do?
 226         if ( !check )
 227             return;
 228
 229         // get the index of this item in the menu
 230         const wxMenuItemList& items = m_parentMenu->GetMenuItems();
 231         int pos = items.IndexOf(this);
 232         wxCHECK_RET( pos != wxNOT_FOUND,
 233                      _T("menuitem not found in the menu items list?") );
 234
 235         // get the radio group range
 236         int start,
 237             end;
 238
 239         if ( m_isRadioGroupStart )
 240         {
 241             // we already have all information we need
 242             start = pos;
 243             end = m_radioGroup.end;
 244         }
 245         else // next radio group item
 246         {
 247             // get the radio group end from the start item
 248             start = m_radioGroup.start;
 249             end = items.Item(start)->GetData()->m_radioGroup.end;
 250         }
 251
 252 #ifdef __WIN32__
 253         // calling CheckMenuRadioItem() with such parameters hangs my system
 254         // (NT4 SP6) and I suspect this could happen to the others as well - so
 255         // don't do it!
 256         wxCHECK_RET( start != -1 && end != -1,
 257                      _T("invalid ::CheckMenuRadioItem() parameter(s)") );
 258
 259         if ( !::CheckMenuRadioItem(hmenu,
 260                                    start,   // the first radio group item
 261                                    end,     // the last one
 262                                    pos,     // the one to check
 263                                    MF_BYPOSITION) )
 264         {
 265             wxLogLastError(_T("CheckMenuRadioItem"));
 266         }
 267 #endif // __WIN32__
 268
 269         // also uncheck all the other items in this radio group
 270         wxMenuItemList::compatibility_iterator node = items.Item(start);
 271         for ( int n = start; n <= end && node; n++ )
 272         {
 273             if ( n != pos )
 274             {
 275                 node->GetData()->m_isChecked = FALSE;
 276             }
 277
 278             // we also have to do it in the menu for Win16 (under Win32
 279             // CheckMenuRadioItem() does it for us)
 280 #ifndef __WIN32__
 281             ::CheckMenuItem(hmenu, n, n == pos ? MF_CHECKED : MF_UNCHECKED);
 282 #endif // Win16
 283
 284             node = node->GetNext();
 285         }
 286     }
 287     else // check item
 288     {
 289         if ( ::CheckMenuItem(hmenu,
 290                              GetRealId(),
 291                              MF_BYCOMMAND | flags) == (DWORD)-1 )
 292         {
 293             wxLogLastError(wxT("CheckMenuItem"));
 294         }
 295     }
 296
 297     wxMenuItemBase::Check(check);
 298 }
 299
 300 void wxMenuItem::SetText(const wxString& text)
 301 {
 302     // don't do anything if label didn't change
 303     if ( m_text == text )
 304         return;
 305
 306     wxMenuItemBase::SetText(text);
 307     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 308 #if wxUSE_OWNER_DRAWN
 309     // tell the owner drawing code to to show the accel string as well
 310     SetAccelString(text.AfterFirst(_T('\t')));
 311 #endif
 312
 313     HMENU hMenu = GetHMenuOf(m_parentMenu);
 314     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 315
 316 #if wxUSE_ACCEL
 317     m_parentMenu->UpdateAccel(this);
 318 #endif // wxUSE_ACCEL
 319
 320     UINT id = GetRealId();
 321     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 322     if ( flagsOld == 0xFFFFFFFF )
 323     {
 324         wxLogLastError(wxT("GetMenuState"));
 325     }
 326     else
 327     {
 328         if ( IsSubMenu() )
 329         {
 330             // high byte contains the number of items in a submenu for submenus
 331             flagsOld &= 0xFF;
 332             flagsOld |= MF_POPUP;
 333         }
 334
 335         LPCTSTR data;
 336
 337 #if wxUSE_OWNER_DRAWN
 338         if ( IsOwnerDrawn() )
 339         {
 340             flagsOld |= MF_OWNERDRAW;
 341             data = (LPCTSTR)this;
 342         }
 343         else
 344 #endif  //owner drawn
 345         {
 346             flagsOld |= MF_STRING;
 347             data = (wxChar*) text.c_str();
 348         }
 349
 350 #ifdef __WXWINCE__
 351         // FIXME: complete this, applying the old
 352         // flags.
 353         // However, the WinCE doc for SetMenuItemInfo
 354         // says that you can't use it to set the menu
 355         // item state; only data, id and type.
 356         MENUITEMINFO info;
 357         wxZeroMemory(info);
 358         info.cbSize = sizeof(info);
 359         info.fMask = MIIM_TYPE;
 360         info.fType = MFT_STRING;
 361         info.cch = text.Length();
 362         info.dwTypeData = (LPTSTR) data ;
 363         if ( !SetMenuItemInfo(hMenu, id, FALSE, & info) )
 364         {
 365             wxLogLastError(wxT("SetMenuItemInfo"));
 366         }
 367 #else
 368         if ( ::ModifyMenu(hMenu, id,
 369                           MF_BYCOMMAND | flagsOld,
 370                           id, data) == (int)0xFFFFFFFF )
 371         {
 372             wxLogLastError(wxT("ModifyMenu"));
 373         }
 374 #endif
 375     }
 376 }
 377
 378 void wxMenuItem::SetCheckable(bool checkable)
 379 {
 380     wxMenuItemBase::SetCheckable(checkable);
 381     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 382 }
 383
 384 // ----------------------------------------------------------------------------
 385 // wxMenuItemBase
 386 // ----------------------------------------------------------------------------
 387
 388 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 389                                 int id,
 390                                 const wxString& name,
 391                                 const wxString& help,
 392                                 wxItemKind kind,
 393                                 wxMenu *subMenu)
 394 {
 395     return new wxMenuItem(parentMenu, id, name, help, kind, subMenu);
 396 }
 397
 398 #endif // wxUSE_MENUS