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