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 #if  wxUSE_OWNER_DRAWN
  98     // set default menu colors
  99     #define SYS_COLOR(c) (wxSystemSettings::GetColour(wxSYS_COLOUR_##c))
 100
 101     SetTextColour(SYS_COLOR(MENUTEXT));
 102     SetBackgroundColour(SYS_COLOR(MENU));
 103
 104     #undef  SYS_COLOR
 105
 106     // we don't want normal items be owner-drawn
 107     ResetOwnerDrawn();
 108
 109     // tell the owner drawing code to to show the accel string as well
 110     SetAccelString(text.AfterFirst(_T('\t')));
 111 #endif // wxUSE_OWNER_DRAWN
 112 }
 113
 114 wxMenuItem::~wxMenuItem()
 115 {
 116 }
 117
 118 // misc
 119 // ----
 120
 121 // return the id for calling Win32 API functions
 122 int wxMenuItem::GetRealId() const
 123 {
 124     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 125 }
 126
 127 // get item state
 128 // --------------
 129
 130 bool wxMenuItem::IsChecked() const
 131 {
 132     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 133
 134     return (flag & MF_CHECKED) != 0;
 135 }
 136
 137 /* static */
 138 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 139 {
 140     return wxStripMenuCodes(text);
 141 }
 142
 143 // change item state
 144 // -----------------
 145
 146 void wxMenuItem::Enable(bool enable)
 147 {
 148     if ( m_isEnabled == enable )
 149         return;
 150
 151     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 152                              GetRealId(),
 153                              MF_BYCOMMAND |
 154                              (enable ? MF_ENABLED : MF_GRAYED));
 155
 156     if ( rc == -1 ) {
 157         wxLogLastError(wxT("EnableMenuItem"));
 158     }
 159
 160     wxMenuItemBase::Enable(enable);
 161 }
 162
 163 void wxMenuItem::Check(bool check)
 164 {
 165     wxCHECK_RET( IsCheckable(), wxT("only checkable items may be checked") );
 166
 167     if ( m_isChecked == check )
 168         return;
 169
 170     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 171                             GetRealId(),
 172                             MF_BYCOMMAND |
 173                             (check ? MF_CHECKED : MF_UNCHECKED));
 174
 175     if ( rc == -1 ) {
 176         wxLogLastError(wxT("CheckMenuItem"));
 177     }
 178
 179     wxMenuItemBase::Check(check);
 180 }
 181
 182 void wxMenuItem::SetText(const wxString& text)
 183 {
 184     // don't do anything if label didn't change
 185     if ( m_text == text )
 186         return;
 187
 188     wxMenuItemBase::SetText(text);
 189     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 190
 191     HMENU hMenu = GetHMenuOf(m_parentMenu);
 192     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 193
 194 #if wxUSE_ACCEL
 195     m_parentMenu->UpdateAccel(this);
 196 #endif // wxUSE_ACCEL
 197
 198     UINT id = GetRealId();
 199     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 200     if ( flagsOld == 0xFFFFFFFF )
 201     {
 202         wxLogLastError(wxT("GetMenuState"));
 203     }
 204     else
 205     {
 206         if ( IsSubMenu() )
 207         {
 208             // high byte contains the number of items in a submenu for submenus
 209             flagsOld &= 0xFF;
 210             flagsOld |= MF_POPUP;
 211         }
 212
 213         LPCTSTR data;
 214
 215 #if wxUSE_OWNER_DRAWN
 216         if ( IsOwnerDrawn() )
 217         {
 218             flagsOld |= MF_OWNERDRAW;
 219             data = (LPCTSTR)this;
 220         }
 221         else
 222 #endif  //owner drawn
 223         {
 224             flagsOld |= MF_STRING;
 225             data = (wxChar*) text.c_str();
 226         }
 227
 228         if ( ::ModifyMenu(hMenu, id,
 229                           MF_BYCOMMAND | flagsOld,
 230                           id, data) == (int)0xFFFFFFFF )
 231         {
 232             wxLogLastError(wxT("ModifyMenu"));
 233         }
 234     }
 235 }
 236
 237 void wxMenuItem::SetCheckable(bool checkable)
 238 {
 239     wxMenuItemBase::SetCheckable(checkable);
 240     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 241 }
 242
 243 // ----------------------------------------------------------------------------
 244 // wxMenuItemBase
 245 // ----------------------------------------------------------------------------
 246
 247 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 248                                 int id,
 249                                 const wxString& name,
 250                                 const wxString& help,
 251                                 wxItemKind kind,
 252                                 wxMenu *subMenu)
 253 {
 254     return new wxMenuItem(parentMenu, id, name, help, kind, subMenu);
 255 }
 256
 257 #endif // wxUSE_MENUS