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 wxString wxMenuItem::GetLabel() const
 145 {
 146     return wxStripMenuCodes(m_text);
 147 }
 148
 149 // accelerators
 150 // ------------
 151
 152 #if wxUSE_ACCEL
 153
 154 wxAcceleratorEntry *wxMenuItem::GetAccel() const
 155 {
 156     return wxGetAccelFromString(GetText());
 157 }
 158
 159 #endif // wxUSE_ACCEL
 160
 161 // change item state
 162 // -----------------
 163
 164 void wxMenuItem::Enable(bool enable)
 165 {
 166     if ( m_isEnabled == enable )
 167         return;
 168
 169     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 170                              GetRealId(),
 171                              MF_BYCOMMAND |
 172                              (enable ? MF_ENABLED : MF_GRAYED));
 173
 174     if ( rc == -1 ) {
 175         wxLogLastError("EnableMenuItem");
 176     }
 177
 178     wxMenuItemBase::Enable(enable);
 179 }
 180
 181 void wxMenuItem::Check(bool check)
 182 {
 183     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 184
 185     if ( m_isChecked == check )
 186         return;
 187
 188     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 189                             GetRealId(),
 190                             MF_BYCOMMAND |
 191                             (check ? MF_CHECKED : MF_UNCHECKED));
 192
 193     if ( rc == -1 ) {
 194         wxLogLastError("CheckMenuItem");
 195     }
 196
 197     wxMenuItemBase::Check(check);
 198 }
 199
 200 void wxMenuItem::SetText(const wxString& text)
 201 {
 202     // don't do anything if label didn't change
 203     if ( m_text == text )
 204         return;
 205
 206     wxMenuItemBase::SetText(text);
 207     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 208
 209     HMENU hMenu = GetHMenuOf(m_parentMenu);
 210     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 211
 212 #if wxUSE_ACCEL
 213     m_parentMenu->UpdateAccel(this);
 214 #endif // wxUSE_ACCEL
 215
 216     UINT id = GetRealId();
 217     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 218     if ( flagsOld == 0xFFFFFFFF )
 219     {
 220         wxLogLastError("GetMenuState");
 221     }
 222     else
 223     {
 224         if ( IsSubMenu() )
 225         {
 226             // high byte contains the number of items in a submenu for submenus
 227             flagsOld &= 0xFF;
 228             flagsOld |= MF_POPUP;
 229         }
 230
 231         LPCTSTR data;
 232
 233 #if wxUSE_OWNER_DRAWN
 234         if ( IsOwnerDrawn() )
 235         {
 236             flagsOld |= MF_OWNERDRAW;
 237             data = (LPCTSTR)this;
 238         }
 239         else
 240 #endif  //owner drawn
 241         {
 242             flagsOld |= MF_STRING;
 243             data = (char*) text.c_str();
 244         }
 245
 246         if ( ::ModifyMenu(hMenu, id,
 247                           MF_BYCOMMAND | flagsOld,
 248                           id, data) == (int)0xFFFFFFFF )
 249         {
 250             wxLogLastError(wxT("ModifyMenu"));
 251         }
 252     }
 253 }
 254
 255 void wxMenuItem::SetCheckable(bool checkable)
 256 {
 257     wxMenuItemBase::SetCheckable(checkable);
 258     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 259 }
 260
 261 // ----------------------------------------------------------------------------
 262 // wxMenuItemBase
 263 // ----------------------------------------------------------------------------
 264
 265 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 266                                 int id,
 267                                 const wxString& name,
 268                                 const wxString& help,
 269                                 bool isCheckable,
 270                                 wxMenu *subMenu)
 271 {
 272     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 273 }