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_startRadioGroup =
 116     m_endRadioGroup = -1;
 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 // change item state
 165 // -----------------
 166
 167 void wxMenuItem::Enable(bool enable)
 168 {
 169     if ( m_isEnabled == enable )
 170         return;
 171
 172     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 173                              GetRealId(),
 174                              MF_BYCOMMAND |
 175                              (enable ? MF_ENABLED : MF_GRAYED));
 176
 177     if ( rc == -1 ) {
 178         wxLogLastError(wxT("EnableMenuItem"));
 179     }
 180
 181     wxMenuItemBase::Enable(enable);
 182 }
 183
 184 void wxMenuItem::Check(bool check)
 185 {
 186     wxCHECK_RET( IsCheckable(), wxT("only checkable items may be checked") );
 187
 188     if ( m_isChecked == check )
 189         return;
 190
 191     int flags = check ? MF_CHECKED : MF_UNCHECKED;
 192     HMENU hmenu = GetHMenuOf(m_parentMenu);
 193
 194     if ( GetKind() == wxITEM_RADIO )
 195     {
 196         // it doesn't make sense to uncheck a radio item - what would this do?
 197         if ( !check )
 198             return;
 199
 200         const wxMenuItemList& items = m_parentMenu->GetMenuItems();
 201         int pos = items.IndexOf(this);
 202         wxCHECK_RET( pos != wxNOT_FOUND,
 203                      _T("menuitem not found in the menu items list?") );
 204
 205 #ifdef __WIN32__
 206         if ( !::CheckMenuRadioItem(hmenu,
 207                                    m_startRadioGroup,   // first group item
 208                                    m_endRadioGroup,     // last one
 209                                    pos,                 // the one to check
 210                                    MF_BYPOSITION | flags) )
 211         {
 212             wxLogLastError(_T("CheckMenuRadioItem"));
 213         }
 214 #endif // __WIN32__
 215
 216         // also uncheck all the other items in this radio group
 217         wxMenuItemList::Node *node = items.Item(m_startRadioGroup);
 218         for ( int n = m_startRadioGroup; n <= m_endRadioGroup && node; n++ )
 219         {
 220             if ( n != pos )
 221             {
 222                 node->GetData()->m_isChecked = FALSE;
 223             }
 224
 225             // we also have to do it in the menu for Win16 (under Win32
 226             // CheckMenuRadioItem() does it for us)
 227 #ifndef __WIN32__
 228             ::CheckMenuItem(hmenu, n, n == pos ? MF_CHECKED : MF_UNCHECKED);
 229 #endif // Win16
 230
 231             node = node->GetNext();
 232         }
 233     }
 234     else // check item
 235     {
 236         if ( ::CheckMenuItem(hmenu,
 237                              GetRealId(),
 238                              MF_BYCOMMAND | flags) == -1 )
 239         {
 240             wxLogLastError(wxT("CheckMenuItem"));
 241         }
 242     }
 243
 244     wxMenuItemBase::Check(check);
 245 }
 246
 247 void wxMenuItem::SetText(const wxString& text)
 248 {
 249     // don't do anything if label didn't change
 250     if ( m_text == text )
 251         return;
 252
 253     wxMenuItemBase::SetText(text);
 254     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 255
 256     HMENU hMenu = GetHMenuOf(m_parentMenu);
 257     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 258
 259 #if wxUSE_ACCEL
 260     m_parentMenu->UpdateAccel(this);
 261 #endif // wxUSE_ACCEL
 262
 263     UINT id = GetRealId();
 264     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 265     if ( flagsOld == 0xFFFFFFFF )
 266     {
 267         wxLogLastError(wxT("GetMenuState"));
 268     }
 269     else
 270     {
 271         if ( IsSubMenu() )
 272         {
 273             // high byte contains the number of items in a submenu for submenus
 274             flagsOld &= 0xFF;
 275             flagsOld |= MF_POPUP;
 276         }
 277
 278         LPCTSTR data;
 279
 280 #if wxUSE_OWNER_DRAWN
 281         if ( IsOwnerDrawn() )
 282         {
 283             flagsOld |= MF_OWNERDRAW;
 284             data = (LPCTSTR)this;
 285         }
 286         else
 287 #endif  //owner drawn
 288         {
 289             flagsOld |= MF_STRING;
 290             data = (wxChar*) text.c_str();
 291         }
 292
 293         if ( ::ModifyMenu(hMenu, id,
 294                           MF_BYCOMMAND | flagsOld,
 295                           id, data) == (int)0xFFFFFFFF )
 296         {
 297             wxLogLastError(wxT("ModifyMenu"));
 298         }
 299     }
 300 }
 301
 302 void wxMenuItem::SetCheckable(bool checkable)
 303 {
 304     wxMenuItemBase::SetCheckable(checkable);
 305     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 306 }
 307
 308 // ----------------------------------------------------------------------------
 309 // wxMenuItemBase
 310 // ----------------------------------------------------------------------------
 311
 312 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 313                                 int id,
 314                                 const wxString& name,
 315                                 const wxString& help,
 316                                 wxItemKind kind,
 317                                 wxMenu *subMenu)
 318 {
 319     return new wxMenuItem(parentMenu, id, name, help, kind, subMenu);
 320 }
 321
 322 #endif // wxUSE_MENUS