src/msw/menuitem.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_MENUS
  28
  29 #include "wx/menuitem.h"
  30 #include "wx/stockitem.h"
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/font.h"
  34     #include "wx/bitmap.h"
  35     #include "wx/settings.h"
  36     #include "wx/window.h"
  37     #include "wx/accel.h"
  38     #include "wx/string.h"
  39     #include "wx/log.h"
  40     #include "wx/menu.h"
  41 #endif
  42
  43 #if wxUSE_ACCEL
  44     #include "wx/accel.h"
  45 #endif // wxUSE_ACCEL
  46
  47 #include "wx/msw/private.h"
  48
  49 #ifdef __WXWINCE__
  50 // Implemented in menu.cpp
  51 UINT GetMenuState(HMENU hMenu, UINT id, UINT flags) ;
  52 #endif
  53
  54 // ---------------------------------------------------------------------------
  55 // macro
  56 // ---------------------------------------------------------------------------
  57
  58 // hide the ugly cast
  59 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  60
  61 // conditional compilation
  62 #if wxUSE_OWNER_DRAWN
  63     #define OWNER_DRAWN_ONLY( code ) if ( IsOwnerDrawn() ) code
  64 #else // !wxUSE_OWNER_DRAWN
  65     #define OWNER_DRAWN_ONLY( code )
  66 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
  67
  68 // ============================================================================
  69 // implementation
  70 // ============================================================================
  71
  72 // ----------------------------------------------------------------------------
  73 // dynamic classes implementation
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_EXTENDED_RTTI
  77
  78 bool wxMenuItemStreamingCallback( const wxObject *object, wxWriter * , wxPersister * , wxxVariantArray & )
  79 {
  80     const wxMenuItem * mitem = dynamic_cast<const wxMenuItem*>(object) ;
  81     if ( mitem->GetMenu() && !mitem->GetMenu()->GetTitle().empty() )
  82     {
  83         // we don't stream out the first two items for menus with a title, they will be reconstructed
  84         if ( mitem->GetMenu()->FindItemByPosition(0) == mitem || mitem->GetMenu()->FindItemByPosition(1) == mitem )
  85             return false ;
  86     }
  87     return true ;
  88 }
  89
  90 wxBEGIN_ENUM( wxItemKind )
  91     wxENUM_MEMBER( wxITEM_SEPARATOR )
  92     wxENUM_MEMBER( wxITEM_NORMAL )
  93     wxENUM_MEMBER( wxITEM_CHECK )
  94     wxENUM_MEMBER( wxITEM_RADIO )
  95 wxEND_ENUM( wxItemKind )
  96
  97 IMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxMenuItem, wxObject,"wx/menuitem.h",wxMenuItemStreamingCallback)
  98
  99 wxBEGIN_PROPERTIES_TABLE(wxMenuItem)
 100     wxPROPERTY( Parent,wxMenu*, SetMenu, GetMenu, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 101     wxPROPERTY( Id,int, SetId, GetId, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 102     wxPROPERTY( Text, wxString , SetText, GetText, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 103     wxPROPERTY( Help, wxString , SetHelp, GetHelp, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 104     wxREADONLY_PROPERTY( Kind, wxItemKind , GetKind , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 105     wxPROPERTY( SubMenu,wxMenu*, SetSubMenu, GetSubMenu, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
 106     wxPROPERTY( Enabled , bool , Enable , IsEnabled , wxxVariant((bool)true) , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 107     wxPROPERTY( Checked , bool , Check , IsChecked , wxxVariant((bool)false) , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 108     wxPROPERTY( Checkable , bool , SetCheckable , IsCheckable , wxxVariant((bool)false) , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 109 wxEND_PROPERTIES_TABLE()
 110
 111 wxBEGIN_HANDLERS_TABLE(wxMenuItem)
 112 wxEND_HANDLERS_TABLE()
 113
 114 wxDIRECT_CONSTRUCTOR_6( wxMenuItem , wxMenu* , Parent , int , Id , wxString , Text , wxString , Help , wxItemKind , Kind , wxMenu* , SubMenu  )
 115 #else
 116 IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxObject)
 117 #endif
 118
 119 // ----------------------------------------------------------------------------
 120 // wxMenuItem
 121 // ----------------------------------------------------------------------------
 122
 123 // ctor & dtor
 124 // -----------
 125
 126 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
 127                        int id,
 128                        const wxString& text,
 129                        const wxString& strHelp,
 130                        wxItemKind kind,
 131                        wxMenu *pSubMenu)
 132           : wxMenuItemBase(pParentMenu, id, text, strHelp, kind, pSubMenu)
 133 #if wxUSE_OWNER_DRAWN
 134             , wxOwnerDrawn(text, kind == wxITEM_CHECK, true)
 135 #endif // owner drawn
 136 {
 137     Init();
 138 }
 139
 140 #if WXWIN_COMPATIBILITY_2_8
 141 wxMenuItem::wxMenuItem(wxMenu *parentMenu,
 142                        int id,
 143                        const wxString& text,
 144                        const wxString& help,
 145                        bool isCheckable,
 146                        wxMenu *subMenu)
 147           : wxMenuItemBase(parentMenu, id, text, help,
 148                            isCheckable ? wxITEM_CHECK : wxITEM_NORMAL, subMenu)
 149 #if wxUSE_OWNER_DRAWN
 150            , wxOwnerDrawn(text, isCheckable, true)
 151 #endif // owner drawn
 152 {
 153     Init();
 154 }
 155 #endif
 156
 157 void wxMenuItem::Init()
 158 {
 159     m_radioGroup.start = -1;
 160     m_isRadioGroupStart = false;
 161
 162 #if  wxUSE_OWNER_DRAWN
 163
 164     // when the color is not valid, wxOwnerDraw takes the default ones.
 165     // If we set the colors here and they are changed by the user during
 166     // the execution, then the colors are not updated until the application
 167     // is restarted and our menus look bad
 168     SetTextColour(wxNullColour);
 169     SetBackgroundColour(wxNullColour);
 170
 171     // setting default colors switched ownerdraw on: switch it off again
 172     ResetOwnerDrawn();
 173
 174     //  switch ownerdraw back on if using a non default margin
 175     if ( !IsSeparator() )
 176         SetMarginWidth(GetMarginWidth());
 177
 178     // tell the owner drawing code to show the accel string as well
 179     SetAccelString(m_text.AfterFirst(_T('\t')));
 180 #endif // wxUSE_OWNER_DRAWN
 181 }
 182
 183 wxMenuItem::~wxMenuItem()
 184 {
 185 }
 186
 187 // misc
 188 // ----
 189
 190 // return the id for calling Win32 API functions
 191 WXWPARAM wxMenuItem::GetMSWId() const
 192 {
 193     // we must use ids in unsigned short range with Windows functions, if we
 194     // pass ids > USHRT_MAX to them they get very confused (e.g. start
 195     // generating WM_COMMAND messages with negative high word of wParam), so
 196     // use the cast to ensure the id is in range
 197     return m_subMenu ? wxPtrToUInt(m_subMenu->GetHMenu())
 198                      : static_cast<unsigned short>(GetId());
 199 }
 200
 201 // get item state
 202 // --------------
 203
 204 bool wxMenuItem::IsChecked() const
 205 {
 206     // fix that RTTI is always getting the correct state (separators cannot be checked, but the call below
 207     // returns true
 208     if ( IsSeparator() )
 209         return false ;
 210
 211     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetMSWId(), MF_BYCOMMAND);
 212
 213     return (flag & MF_CHECKED) != 0;
 214 }
 215
 216 // radio group stuff
 217 // -----------------
 218
 219 void wxMenuItem::SetAsRadioGroupStart()
 220 {
 221     m_isRadioGroupStart = true;
 222 }
 223
 224 void wxMenuItem::SetRadioGroupStart(int start)
 225 {
 226     wxASSERT_MSG( !m_isRadioGroupStart,
 227                   _T("should only be called for the next radio items") );
 228
 229     m_radioGroup.start = start;
 230 }
 231
 232 void wxMenuItem::SetRadioGroupEnd(int end)
 233 {
 234     wxASSERT_MSG( m_isRadioGroupStart,
 235                   _T("should only be called for the first radio item") );
 236
 237     m_radioGroup.end = end;
 238 }
 239
 240 // change item state
 241 // -----------------
 242
 243 void wxMenuItem::Enable(bool enable)
 244 {
 245     if ( m_isEnabled == enable )
 246         return;
 247
 248     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 249                              GetMSWId(),
 250                              MF_BYCOMMAND |
 251                              (enable ? MF_ENABLED : MF_GRAYED));
 252
 253     if ( rc == -1 ) {
 254         wxLogLastError(wxT("EnableMenuItem"));
 255     }
 256
 257     wxMenuItemBase::Enable(enable);
 258 }
 259
 260 void wxMenuItem::Check(bool check)
 261 {
 262     wxCHECK_RET( IsCheckable(), wxT("only checkable items may be checked") );
 263
 264     if ( m_isChecked == check )
 265         return;
 266
 267     int flags = check ? MF_CHECKED : MF_UNCHECKED;
 268     HMENU hmenu = GetHMenuOf(m_parentMenu);
 269
 270     if ( GetKind() == wxITEM_RADIO )
 271     {
 272         // it doesn't make sense to uncheck a radio item - what would this do?
 273         if ( !check )
 274             return;
 275
 276         // get the index of this item in the menu
 277         const wxMenuItemList& items = m_parentMenu->GetMenuItems();
 278         int pos = items.IndexOf(this);
 279         wxCHECK_RET( pos != wxNOT_FOUND,
 280                      _T("menuitem not found in the menu items list?") );
 281
 282         // get the radio group range
 283         int start,
 284             end;
 285
 286         if ( m_isRadioGroupStart )
 287         {
 288             // we already have all information we need
 289             start = pos;
 290             end = m_radioGroup.end;
 291         }
 292         else // next radio group item
 293         {
 294             // get the radio group end from the start item
 295             start = m_radioGroup.start;
 296             end = items.Item(start)->GetData()->m_radioGroup.end;
 297         }
 298
 299 #ifdef __WIN32__
 300         // calling CheckMenuRadioItem() with such parameters hangs my system
 301         // (NT4 SP6) and I suspect this could happen to the others as well - so
 302         // don't do it!
 303         wxCHECK_RET( start != -1 && end != -1,
 304                      _T("invalid ::CheckMenuRadioItem() parameter(s)") );
 305
 306         if ( !::CheckMenuRadioItem(hmenu,
 307                                    start,   // the first radio group item
 308                                    end,     // the last one
 309                                    pos,     // the one to check
 310                                    MF_BYPOSITION) )
 311         {
 312             wxLogLastError(_T("CheckMenuRadioItem"));
 313         }
 314 #endif // __WIN32__
 315
 316         // also uncheck all the other items in this radio group
 317         wxMenuItemList::compatibility_iterator node = items.Item(start);
 318         for ( int n = start; n <= end && node; n++ )
 319         {
 320             if ( n != pos )
 321             {
 322                 node->GetData()->m_isChecked = false;
 323             }
 324
 325             node = node->GetNext();
 326         }
 327     }
 328     else // check item
 329     {
 330         if ( ::CheckMenuItem(hmenu,
 331                              GetMSWId(),
 332                              MF_BYCOMMAND | flags) == (DWORD)-1 )
 333         {
 334             wxFAIL_MSG( _T("CheckMenuItem() failed, item not in the menu?") );
 335         }
 336     }
 337
 338     wxMenuItemBase::Check(check);
 339 }
 340
 341 void wxMenuItem::SetItemLabel(const wxString& txt)
 342 {
 343     wxString text = txt;
 344
 345     // don't do anything if label didn't change
 346     if ( m_text == txt )
 347         return;
 348
 349     // wxMenuItemBase will do stock ID checks
 350     wxMenuItemBase::SetItemLabel(text);
 351
 352     // m_text could now be different from 'text' if we are a stock menu item,
 353     // so use only m_text below
 354
 355     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(m_text) );
 356 #if wxUSE_OWNER_DRAWN
 357     // tell the owner drawing code to to show the accel string as well
 358     SetAccelString(m_text.AfterFirst(_T('\t')));
 359 #endif
 360
 361     HMENU hMenu = GetHMenuOf(m_parentMenu);
 362     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 363
 364 #if wxUSE_ACCEL
 365     m_parentMenu->UpdateAccel(this);
 366 #endif // wxUSE_ACCEL
 367
 368 #if wxUSE_OWNER_DRAWN
 369     if ( IsOwnerDrawn() )
 370     {
 371         // we don't need to do anything for owner drawn items, they will redraw
 372         // themselves using the new text the next time they're displayed
 373         return;
 374     }
 375 #endif // owner drawn
 376
 377     // update the text of the native menu item
 378     const UINT id = GetMSWId();
 379
 380     WinStruct<MENUITEMINFO> info;
 381
 382     // surprisingly, calling SetMenuItemInfo() with just MIIM_STRING doesn't
 383     // work as it resets the menu bitmap, so we need to first get the old item
 384     // state and then modify it
 385     const bool isLaterThanWin95 = wxGetWinVersion() > wxWinVersion_95;
 386     info.fMask = MIIM_STATE |
 387                  MIIM_ID |
 388                  MIIM_SUBMENU |
 389                  MIIM_CHECKMARKS |
 390                  MIIM_DATA;
 391     if ( isLaterThanWin95 )
 392         info.fMask |= MIIM_BITMAP | MIIM_FTYPE;
 393     else
 394         info.fMask |= MIIM_TYPE;
 395     if ( !::GetMenuItemInfo(hMenu, id, FALSE, &info) )
 396     {
 397         wxLogLastError(wxT("GetMenuItemInfo"));
 398         return;
 399     }
 400
 401     if ( isLaterThanWin95 )
 402         info.fMask |= MIIM_STRING;
 403     //else: MIIM_TYPE already specified
 404     info.dwTypeData = (LPTSTR)m_text.wx_str();
 405     info.cch = m_text.length();
 406     if ( !::SetMenuItemInfo(hMenu, id, FALSE, &info) )
 407     {
 408         wxLogLastError(wxT("SetMenuItemInfo"));
 409     }
 410 }
 411
 412 void wxMenuItem::SetCheckable(bool checkable)
 413 {
 414     wxMenuItemBase::SetCheckable(checkable);
 415     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 416 }
 417
 418 // ----------------------------------------------------------------------------
 419 // wxMenuItemBase
 420 // ----------------------------------------------------------------------------
 421
 422 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 423                                 int id,
 424                                 const wxString& name,
 425                                 const wxString& help,
 426                                 wxItemKind kind,
 427                                 wxMenu *subMenu)
 428 {
 429     return new wxMenuItem(parentMenu, id, name, help, kind, subMenu);
 430 }
 431
 432 #endif // wxUSE_MENUS