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 #if wxUSE_OWNER_DRAWN
  76     IMPLEMENT_DYNAMIC_CLASS2(wxMenuItem, wxMenuItemBase, wxOwnerDrawn)
  77 #else   //!USE_OWNER_DRAWN
  78     IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxMenuItemBase)
  79 #endif  //USE_OWNER_DRAWN
  80
  81 // ----------------------------------------------------------------------------
  82 // wxMenuItem
  83 // ----------------------------------------------------------------------------
  84
  85 // ctor & dtor
  86 // -----------
  87
  88 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
  89                        int id,
  90                        const wxString& text,
  91                        const wxString& strHelp,
  92                        bool bCheckable,
  93                        wxMenu *pSubMenu)
  94 #if wxUSE_OWNER_DRAWN
  95                        : wxOwnerDrawn(GetLabelFromText(text), bCheckable)
  96 #endif // owner drawn
  97 {
  98     wxASSERT_MSG( pParentMenu != NULL, wxT("a menu item should have a parent") );
  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     m_parentMenu  = pParentMenu;
 117     m_subMenu     = pSubMenu;
 118     m_isEnabled   = TRUE;
 119     m_isChecked   = FALSE;
 120     m_id          = id;
 121     m_text        = text;
 122     m_isCheckable = bCheckable;
 123     m_help        = strHelp;
 124 }
 125
 126 wxMenuItem::~wxMenuItem()
 127 {
 128 }
 129
 130 // misc
 131 // ----
 132
 133 // return the id for calling Win32 API functions
 134 int wxMenuItem::GetRealId() const
 135 {
 136     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 137 }
 138
 139 // get item state
 140 // --------------
 141
 142 bool wxMenuItem::IsChecked() const
 143 {
 144     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 145
 146     return (flag & MF_CHECKED) != 0;
 147 }
 148
 149 /* static */
 150 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 151 {
 152     return wxStripMenuCodes(text);
 153 }
 154
 155 // change item state
 156 // -----------------
 157
 158 void wxMenuItem::Enable(bool enable)
 159 {
 160     if ( m_isEnabled == enable )
 161         return;
 162
 163     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 164                              GetRealId(),
 165                              MF_BYCOMMAND |
 166                              (enable ? MF_ENABLED : MF_GRAYED));
 167
 168     if ( rc == -1 ) {
 169         wxLogLastError(wxT("EnableMenuItem"));
 170     }
 171
 172     wxMenuItemBase::Enable(enable);
 173 }
 174
 175 void wxMenuItem::Check(bool check)
 176 {
 177     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 178
 179     if ( m_isChecked == check )
 180         return;
 181
 182     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 183                             GetRealId(),
 184                             MF_BYCOMMAND |
 185                             (check ? MF_CHECKED : MF_UNCHECKED));
 186
 187     if ( rc == -1 ) {
 188         wxLogLastError(wxT("CheckMenuItem"));
 189     }
 190
 191     wxMenuItemBase::Check(check);
 192 }
 193
 194 void wxMenuItem::SetText(const wxString& text)
 195 {
 196     // don't do anything if label didn't change
 197     if ( m_text == text )
 198         return;
 199
 200     wxMenuItemBase::SetText(text);
 201     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 202
 203     HMENU hMenu = GetHMenuOf(m_parentMenu);
 204     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 205
 206 #if wxUSE_ACCEL
 207     m_parentMenu->UpdateAccel(this);
 208 #endif // wxUSE_ACCEL
 209
 210     UINT id = GetRealId();
 211     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 212     if ( flagsOld == 0xFFFFFFFF )
 213     {
 214         wxLogLastError(wxT("GetMenuState"));
 215     }
 216     else
 217     {
 218         if ( IsSubMenu() )
 219         {
 220             // high byte contains the number of items in a submenu for submenus
 221             flagsOld &= 0xFF;
 222             flagsOld |= MF_POPUP;
 223         }
 224
 225         LPCTSTR data;
 226
 227 #if wxUSE_OWNER_DRAWN
 228         if ( IsOwnerDrawn() )
 229         {
 230             flagsOld |= MF_OWNERDRAW;
 231             data = (LPCTSTR)this;
 232         }
 233         else
 234 #endif  //owner drawn
 235         {
 236             flagsOld |= MF_STRING;
 237             data = (wxChar*) text.c_str();
 238         }
 239
 240         if ( ::ModifyMenu(hMenu, id,
 241                           MF_BYCOMMAND | flagsOld,
 242                           id, data) == (int)0xFFFFFFFF )
 243         {
 244             wxLogLastError(wxT("ModifyMenu"));
 245         }
 246     }
 247 }
 248
 249 void wxMenuItem::SetCheckable(bool checkable)
 250 {
 251     wxMenuItemBase::SetCheckable(checkable);
 252     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 253 }
 254
 255 // ----------------------------------------------------------------------------
 256 // wxMenuItemBase
 257 // ----------------------------------------------------------------------------
 258
 259 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 260                                 int id,
 261                                 const wxString& name,
 262                                 const wxString& help,
 263                                 bool isCheckable,
 264                                 wxMenu *subMenu)
 265 {
 266     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 267 }
 268
 269 #endif // wxUSE_MENUS