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     wxASSERT_MSG( pParentMenu != NULL, wxT("a menu item should have a parent") );
  96
  97     m_startRadioGroup =
  98     m_endRadioGroup = -1;
  99
 100 #if  wxUSE_OWNER_DRAWN
 101     // set default menu colors
 102     #define SYS_COLOR(c) (wxSystemSettings::GetColour(wxSYS_COLOUR_##c))
 103
 104     SetTextColour(SYS_COLOR(MENUTEXT));
 105     SetBackgroundColour(SYS_COLOR(MENU));
 106
 107     #undef  SYS_COLOR
 108
 109     // we don't want normal items be owner-drawn
 110     ResetOwnerDrawn();
 111
 112     // tell the owner drawing code to to show the accel string as well
 113     SetAccelString(text.AfterFirst(_T('\t')));
 114 #endif // wxUSE_OWNER_DRAWN
 115 }
 116
 117 wxMenuItem::~wxMenuItem()
 118 {
 119 }
 120
 121 // misc
 122 // ----
 123
 124 // return the id for calling Win32 API functions
 125 int wxMenuItem::GetRealId() const
 126 {
 127     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 128 }
 129
 130 // get item state
 131 // --------------
 132
 133 bool wxMenuItem::IsChecked() const
 134 {
 135     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 136
 137     return (flag & MF_CHECKED) != 0;
 138 }
 139
 140 /* static */
 141 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 142 {
 143     return wxStripMenuCodes(text);
 144 }
 145
 146 // change item state
 147 // -----------------
 148
 149 void wxMenuItem::Enable(bool enable)
 150 {
 151     if ( m_isEnabled == enable )
 152         return;
 153
 154     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 155                              GetRealId(),
 156                              MF_BYCOMMAND |
 157                              (enable ? MF_ENABLED : MF_GRAYED));
 158
 159     if ( rc == -1 ) {
 160         wxLogLastError(wxT("EnableMenuItem"));
 161     }
 162
 163     wxMenuItemBase::Enable(enable);
 164 }
 165
 166 void wxMenuItem::Check(bool check)
 167 {
 168     wxCHECK_RET( IsCheckable(), wxT("only checkable items may be checked") );
 169
 170     if ( m_isChecked == check )
 171         return;
 172
 173     int flags = check ? MF_CHECKED : MF_UNCHECKED;
 174     HMENU hmenu = GetHMenuOf(m_parentMenu);
 175
 176     if ( GetKind() == wxItem_Radio )
 177     {
 178         // it doesn't make sense to uncheck a radio item - what would this do?
 179         if ( !check )
 180             return;
 181
 182         const wxMenuItemList& items = m_parentMenu->GetMenuItems();
 183         int pos = items.IndexOf(this);
 184         wxCHECK_RET( pos != wxNOT_FOUND,
 185                      _T("menuitem not found in the menu items list?") );
 186
 187 #ifdef __WIN32__
 188         if ( !::CheckMenuRadioItem(hmenu,
 189                                    m_startRadioGroup,   // first group item
 190                                    m_endRadioGroup,     // last one
 191                                    pos,                 // the one to check
 192                                    MF_BYPOSITION | flags) )
 193         {
 194             wxLogLastError(_T("CheckMenuRadioItem"));
 195         }
 196 #endif // __WIN32__
 197
 198         // also uncheck all the other items in this radio group
 199         wxMenuItemList::Node *node = items.Item(m_startRadioGroup);
 200         for ( int n = m_startRadioGroup; n <= m_endRadioGroup && node; n++ )
 201         {
 202             if ( n != pos )
 203             {
 204                 node->GetData()->m_isChecked = FALSE;
 205             }
 206
 207             // we also have to do it in the menu for Win16 (under Win32
 208             // CheckMenuRadioItem() does it for us)
 209 #ifndef __WIN32__
 210             ::CheckMenuItem(hmenu, n, n == pos ? MF_CHECKED : MF_UNCHECKED);
 211 #endif // Win16
 212
 213             node = node->GetNext();
 214         }
 215     }
 216     else // check item
 217     {
 218         if ( ::CheckMenuItem(hmenu,
 219                              GetRealId(),
 220                              MF_BYCOMMAND | flags) == -1 )
 221         {
 222             wxLogLastError(wxT("CheckMenuItem"));
 223         }
 224     }
 225
 226     wxMenuItemBase::Check(check);
 227 }
 228
 229 void wxMenuItem::SetText(const wxString& text)
 230 {
 231     // don't do anything if label didn't change
 232     if ( m_text == text )
 233         return;
 234
 235     wxMenuItemBase::SetText(text);
 236     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 237
 238     HMENU hMenu = GetHMenuOf(m_parentMenu);
 239     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 240
 241 #if wxUSE_ACCEL
 242     m_parentMenu->UpdateAccel(this);
 243 #endif // wxUSE_ACCEL
 244
 245     UINT id = GetRealId();
 246     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 247     if ( flagsOld == 0xFFFFFFFF )
 248     {
 249         wxLogLastError(wxT("GetMenuState"));
 250     }
 251     else
 252     {
 253         if ( IsSubMenu() )
 254         {
 255             // high byte contains the number of items in a submenu for submenus
 256             flagsOld &= 0xFF;
 257             flagsOld |= MF_POPUP;
 258         }
 259
 260         LPCTSTR data;
 261
 262 #if wxUSE_OWNER_DRAWN
 263         if ( IsOwnerDrawn() )
 264         {
 265             flagsOld |= MF_OWNERDRAW;
 266             data = (LPCTSTR)this;
 267         }
 268         else
 269 #endif  //owner drawn
 270         {
 271             flagsOld |= MF_STRING;
 272             data = (wxChar*) text.c_str();
 273         }
 274
 275         if ( ::ModifyMenu(hMenu, id,
 276                           MF_BYCOMMAND | flagsOld,
 277                           id, data) == (int)0xFFFFFFFF )
 278         {
 279             wxLogLastError(wxT("ModifyMenu"));
 280         }
 281     }
 282 }
 283
 284 void wxMenuItem::SetCheckable(bool checkable)
 285 {
 286     wxMenuItemBase::SetCheckable(checkable);
 287     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 288 }
 289
 290 // ----------------------------------------------------------------------------
 291 // wxMenuItemBase
 292 // ----------------------------------------------------------------------------
 293
 294 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 295                                 int id,
 296                                 const wxString& name,
 297                                 const wxString& help,
 298                                 wxItemKind kind,
 299                                 wxMenu *subMenu)
 300 {
 301     return new wxMenuItem(parentMenu, id, name, help, kind, subMenu);
 302 }
 303
 304 #endif // wxUSE_MENUS