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(GetLabelFromText(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     #undef  SYS_COLOR
 106
 107     // we don't want normal items be owner-drawn
 108     ResetOwnerDrawn();
 109
 110     // tell the owner drawing code to to show the accel string as well
 111     SetAccelString(text.AfterFirst(_T('\t')));
 112 #endif // wxUSE_OWNER_DRAWN
 113
 114     m_parentMenu  = pParentMenu;
 115     m_subMenu     = pSubMenu;
 116     m_isEnabled   = TRUE;
 117     m_isChecked   = FALSE;
 118     m_id          = id;
 119     m_text        = text;
 120     m_isCheckable = bCheckable;
 121     m_help        = strHelp;
 122 }
 123
 124 wxMenuItem::~wxMenuItem()
 125 {
 126 }
 127
 128 // misc
 129 // ----
 130
 131 // return the id for calling Win32 API functions
 132 int wxMenuItem::GetRealId() const
 133 {
 134     return m_subMenu ? (int)m_subMenu->GetHMenu() : GetId();
 135 }
 136
 137 // get item state
 138 // --------------
 139
 140 bool wxMenuItem::IsChecked() const
 141 {
 142     int flag = ::GetMenuState(GetHMenuOf(m_parentMenu), GetId(), MF_BYCOMMAND);
 143
 144     return (flag & MF_CHECKED) != 0;
 145 }
 146
 147 /* static */
 148 wxString wxMenuItemBase::GetLabelFromText(const wxString& text)
 149 {
 150     return wxStripMenuCodes(text);
 151 }
 152
 153 // accelerators
 154 // ------------
 155
 156 #if wxUSE_ACCEL
 157
 158 wxAcceleratorEntry *wxMenuItem::GetAccel() const
 159 {
 160     return wxGetAccelFromString(GetText());
 161 }
 162
 163 #endif // wxUSE_ACCEL
 164
 165 // change item state
 166 // -----------------
 167
 168 void wxMenuItem::Enable(bool enable)
 169 {
 170     if ( m_isEnabled == enable )
 171         return;
 172
 173     long rc = EnableMenuItem(GetHMenuOf(m_parentMenu),
 174                              GetRealId(),
 175                              MF_BYCOMMAND |
 176                              (enable ? MF_ENABLED : MF_GRAYED));
 177
 178     if ( rc == -1 ) {
 179         wxLogLastError(wxT("EnableMenuItem"));
 180     }
 181
 182     wxMenuItemBase::Enable(enable);
 183 }
 184
 185 void wxMenuItem::Check(bool check)
 186 {
 187     wxCHECK_RET( m_isCheckable, wxT("only checkable items may be checked") );
 188
 189     if ( m_isChecked == check )
 190         return;
 191
 192     long rc = CheckMenuItem(GetHMenuOf(m_parentMenu),
 193                             GetRealId(),
 194                             MF_BYCOMMAND |
 195                             (check ? MF_CHECKED : MF_UNCHECKED));
 196
 197     if ( rc == -1 ) {
 198         wxLogLastError(wxT("CheckMenuItem"));
 199     }
 200
 201     wxMenuItemBase::Check(check);
 202 }
 203
 204 void wxMenuItem::SetText(const wxString& text)
 205 {
 206     // don't do anything if label didn't change
 207     if ( m_text == text )
 208         return;
 209
 210     wxMenuItemBase::SetText(text);
 211     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetName(text) );
 212
 213     HMENU hMenu = GetHMenuOf(m_parentMenu);
 214     wxCHECK_RET( hMenu, wxT("menuitem without menu") );
 215
 216 #if wxUSE_ACCEL
 217     m_parentMenu->UpdateAccel(this);
 218 #endif // wxUSE_ACCEL
 219
 220     UINT id = GetRealId();
 221     UINT flagsOld = ::GetMenuState(hMenu, id, MF_BYCOMMAND);
 222     if ( flagsOld == 0xFFFFFFFF )
 223     {
 224         wxLogLastError(wxT("GetMenuState"));
 225     }
 226     else
 227     {
 228         if ( IsSubMenu() )
 229         {
 230             // high byte contains the number of items in a submenu for submenus
 231             flagsOld &= 0xFF;
 232             flagsOld |= MF_POPUP;
 233         }
 234
 235         LPCTSTR data;
 236
 237 #if wxUSE_OWNER_DRAWN
 238         if ( IsOwnerDrawn() )
 239         {
 240             flagsOld |= MF_OWNERDRAW;
 241             data = (LPCTSTR)this;
 242         }
 243         else
 244 #endif  //owner drawn
 245         {
 246             flagsOld |= MF_STRING;
 247             data = (wxChar*) text.c_str();
 248         }
 249
 250         if ( ::ModifyMenu(hMenu, id,
 251                           MF_BYCOMMAND | flagsOld,
 252                           id, data) == (int)0xFFFFFFFF )
 253         {
 254             wxLogLastError(wxT("ModifyMenu"));
 255         }
 256     }
 257 }
 258
 259 void wxMenuItem::SetCheckable(bool checkable)
 260 {
 261     wxMenuItemBase::SetCheckable(checkable);
 262     OWNER_DRAWN_ONLY( wxOwnerDrawn::SetCheckable(checkable) );
 263 }
 264
 265 // ----------------------------------------------------------------------------
 266 // wxMenuItemBase
 267 // ----------------------------------------------------------------------------
 268
 269 wxMenuItem *wxMenuItemBase::New(wxMenu *parentMenu,
 270                                 int id,
 271                                 const wxString& name,
 272                                 const wxString& help,
 273                                 bool isCheckable,
 274                                 wxMenu *subMenu)
 275 {
 276     return new wxMenuItem(parentMenu, id, name, help, isCheckable, subMenu);
 277 }