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 #ifndef WX_PRECOMP
  32     #include "wx/font.h"
  33     #include "wx/bitmap.h"
  34     #include "wx/settings.h"
  35     #include "wx/font.h"
  36     #include "wx/window.h"
  37     #include "wx/accel.h"
  38     #include "wx/menu.h"
  39     #include "wx/string.h"
  40 #endif
  41
  42 #include "wx/menuitem.h"
  43 #include "wx/log.h"
  44
  45 #if wxUSE_ACCEL
  46     #include "wx/accel.h"
  47 #endif // wxUSE_ACCEL
  48
  49 #include "wx/msw/private.h"
  50
  51 // ---------------------------------------------------------------------------
  52 // macro
  53 // ---------------------------------------------------------------------------
  54
  55 // hide the ugly cast
  56 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  57
  58 // conditional compilation
  59 #if wxUSE_OWNER_DRAWN
  60     #define OWNER_DRAWN_ONLY( code ) if ( IsOwnerDrawn() ) code
  61 #else // !wxUSE_OWNER_DRAWN
  62     #define OWNER_DRAWN_ONLY( code )
  63 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
  64
  65 // ============================================================================
  66 // implementation
  67 // ============================================================================
  68
  69 // ----------------------------------------------------------------------------
  70 // dynamic classes implementation
  71 // ----------------------------------------------------------------------------
  72
  73     #if wxUSE_OWNER_DRAWN
  74         IMPLEMENT_DYNAMIC_CLASS2(wxMenuItem, wxMenuItemBase, wxOwnerDrawn)
  75     #else   //!USE_OWNER_DRAWN
  76         IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxMenuItemBase)
  77     #endif  //USE_OWNER_DRAWN
  78
  79 // ----------------------------------------------------------------------------
  80 // wxMenuItem
  81 // ----------------------------------------------------------------------------
  82
  83 // ctor & dtor
  84 // -----------
  85
  86 wxMenuItem::wxMenuItem(wxMenu *pParentMenu,
  87                        int id,
  88                        const wxString& text,
  89                        const wxString& strHelp,
  90                        bool bCheckable,
  91                        wxMenu *pSubMenu)
  92 #if wxUSE_OWNER_DRAWN
  93                        : wxOwnerDrawn(text, bCheckable)
  94 #endif // owner drawn
  95 {
  96     wxASSERT_MSG( pParentMenu != NULL, wxT("a menu item should have a parent") );
  97
  98 #if  wxUSE_OWNER_DRAWN
  99     // set default menu colors
 100     #define SYS_COLOR(c) (wxSystemSettings::GetSystemColour(wxSYS_COLOUR_##c))
 101
 102     SetTextColour(SYS_COLOR(MENUTEXT));
 103     SetBackgroundColour(SYS_COLOR(MENU));
 104
 105     // we don't want normal items be owner-drawn
 106     ResetOwnerDrawn();
 107
 108     #undef  SYS_COLOR
 109 #endif // wxUSE_OWNER_DRAWN
 110
 111     m_parentMenu  = pParentMenu;
 112     m_subMenu     = pSubMenu;
 113     m_isEnabled   = TRUE;
 114     m_isChecked   = FALSE;
 115     m_id          = id;
 116     m_text        = text;
 117     m_isCheckable = bCheckable;
 118     m_help        = strHelp;
 119 }
 120
 121 wxMenuItem::~wxMenuItem()
 122 {
 123 }
 124
 125 // misc
 126 // ----
 127
 128 // return the id for calling Win32 API functions
 129 int wxMenuItem::GetRealId() const
 130 {
 131     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 132 }
 133
 134 // get item state
 135 // --------------
 136
 137 bool wxMenuItem::IsChecked() const
 138 {
 139     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 140
 141     return (flag & MF_CHECKED) != 0;
 142 }
 143
 144 /* static */
 145 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 146 {
 147     return wxStripMenuCodes(text);
 148 }
 149
 150 // accelerators
 151 // ------------
 152
 153 #if wxUSE_ACCEL
 154
 155 wxAcceleratorEntry *wxMenuItem::GetAccel() const
 156 {
 157     return wxGetAccelFromString(GetText());
 158 }
 159
 160 #endif // wxUSE_ACCEL
 161
 162 // change item state
 163 // -----------------
 164
 165 void wxMenuItem::Enable(bool enable)
 166 {
 167     if ( m_isEnabled == enable )
 168         return;
 169
 170     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 171                              GetRealId(),
 172                              MF_BYCOMMAND |
 173                              (enable ? MF_ENABLED : MF_GRAYED));
 174
 175     if ( rc == -1 ) {
 176         wxLogLastError("EnableMenuItem");
 177     }
 178
 179     wxMenuItemBase::Enable(enable);
 180 }
 181
 182 void wxMenuItem::Check(bool check)
 183 {
 184     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 185
 186     if ( m_isChecked == check )
 187         return;
 188
 189     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 190                             GetRealId(),
 191                             MF_BYCOMMAND |
 192                             (check ? MF_CHECKED : MF_UNCHECKED));
 193
 194     if ( rc == -1 ) {
 195         wxLogLastError("CheckMenuItem");
 196     }
 197
 198     wxMenuItemBase::Check(check);
 199 }
 200
 201 void wxMenuItem::SetText(const wxString& text)
 202 {
 203     // don't do anything if label didn't change
 204     if ( m_text == text )
 205         return;
 206
 207     wxMenuItemBase::SetText(text);
 208     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 209
 210     HMENU hMenu = GetHMenuOf(m_parentMenu);
 211     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 212
 213 #if wxUSE_ACCEL
 214     m_parentMenu->UpdateAccel(this);
 215 #endif // wxUSE_ACCEL
 216
 217     UINT id = GetRealId();
 218     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 219     if ( flagsOld == 0xFFFFFFFF )
 220     {
 221         wxLogLastError("GetMenuState");
 222     }
 223     else
 224     {
 225         if ( IsSubMenu() )
 226         {
 227             // high byte contains the number of items in a submenu for submenus
 228             flagsOld &= 0xFF;
 229             flagsOld |= MF_POPUP;
 230         }
 231
 232         LPCTSTR data;
 233
 234 #if wxUSE_OWNER_DRAWN
 235         if ( IsOwnerDrawn() )
 236         {
 237             flagsOld |= MF_OWNERDRAW;
 238             data = (LPCTSTR)this;
 239         }
 240         else
 241 #endif  //owner drawn
 242         {
 243             flagsOld |= MF_STRING;
 244             data = (wxChar*) text.c_str();
 245         }
 246
 247         if ( ::ModifyMenu(hMenu, id,
 248                           MF_BYCOMMAND | flagsOld,
 249                           id, data) == (int)0xFFFFFFFF )
 250         {
 251             wxLogLastError(wxT("ModifyMenu"));
 252         }
 253     }
 254 }
 255
 256 void wxMenuItem::SetCheckable(bool checkable)
 257 {
 258     wxMenuItemBase::SetCheckable(checkable);
 259     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 260 }
 261
 262 // ----------------------------------------------------------------------------
 263 // wxMenuItemBase
 264 // ----------------------------------------------------------------------------
 265
 266 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 267                                 int id,
 268                                 const wxString& name,
 269                                 const wxString& help,
 270                                 bool isCheckable,
 271                                 wxMenu *subMenu)
 272 {
 273     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 274 }