src/os2/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:     wxChoice
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/13/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_CHOICE
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/choice.h"
  21     #include "wx/utils.h"
  22     #include "wx/log.h"
  23     #include "wx/settings.h"
  24 #endif
  25
  26 #include "wx/os2/private.h"
  27
  28 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  29
  30 bool wxChoice::Create(
  31   wxWindow*                         pParent
  32 , wxWindowID                        vId
  33 , const wxPoint&                    rPos
  34 , const wxSize&                     rSize
  35 , const wxArrayString&              asChoices
  36 , long                              lStyle
  37 , const wxValidator&                rValidator
  38 , const wxString&                   rsName
  39 )
  40 {
  41     wxCArrayString chs(asChoices);
  42
  43     return Create(pParent, vId, rPos, rSize, chs.GetCount(), chs.GetStrings(),
  44                   lStyle, rValidator, rsName);
  45 }
  46
  47 bool wxChoice::Create(
  48   wxWindow*                         pParent
  49 , wxWindowID                        vId
  50 , const wxPoint&                    rPos
  51 , const wxSize&                     rSize
  52 , int                               n
  53 , const wxString                    asChoices[]
  54 , long                              lStyle
  55 , const wxValidator&                rValidator
  56 , const wxString&                   rsName
  57 )
  58 {
  59     long                            lSstyle;
  60
  61     if (!CreateControl( pParent
  62                        ,vId
  63                        ,rPos
  64                        ,rSize
  65                        ,lStyle
  66                        ,rValidator
  67                        ,rsName
  68                       ))
  69         return false;
  70     lSstyle = CBS_DROPDOWNLIST |
  71               WS_TABSTOP       |
  72               WS_VISIBLE;
  73
  74     if (lStyle & wxCLIP_SIBLINGS )
  75         lSstyle |= WS_CLIPSIBLINGS;
  76
  77     wxASSERT_MSG( !(lStyle & wxCB_DROPDOWN) &&
  78                   !(lStyle & wxCB_READONLY) &&
  79                   !(lStyle & wxCB_SIMPLE),
  80                   wxT("this style flag is ignored by wxChoice, you "
  81                      "probably want to use a wxComboBox") );
  82
  83     if (!OS2CreateControl( wxT("COMBOBOX")
  84                           ,lSstyle
  85                          ))
  86         return false;
  87
  88     //
  89     // A choice/combobox normally has a white background (or other, depending
  90     // on global settings) rather than inheriting the parent's background colour.
  91     //
  92     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
  93     for (int i = 0; i < n; i++)
  94     {
  95         Append(asChoices[i]);
  96     }
  97     wxFont*                          pTextFont = new wxFont( 10
  98                                                             ,wxMODERN
  99                                                             ,wxNORMAL
 100                                                             ,wxNORMAL
 101                                                            );
 102     SetFont(*pTextFont);
 103     SetSize( rPos.x
 104             ,rPos.y
 105             ,rSize.x
 106             ,rSize.y
 107            );
 108     delete pTextFont;
 109     return true;
 110 } // end of wxChoice::Create
 111
 112 // ----------------------------------------------------------------------------
 113 // adding/deleting items to/from the list
 114 // ----------------------------------------------------------------------------
 115
 116 int wxChoice::DoAppend(
 117   const wxString&                   rsItem
 118 )
 119 {
 120     int                             nIndex;
 121     LONG                            nIndexType = 0;
 122
 123     if (m_windowStyle & wxLB_SORT)
 124         nIndexType = LIT_SORTASCENDING;
 125     else
 126         nIndexType = LIT_END;
 127     nIndex = (int)::WinSendMsg( GetHwnd()
 128                                ,LM_INSERTITEM
 129                                ,(MPARAM)nIndexType
 130                                ,(MPARAM)rsItem.c_str()
 131                               );
 132     return nIndex;
 133 } // end of wxChoice::DoAppend
 134
 135 int wxChoice::DoInsert(
 136   const wxString&                   rsItem,
 137   int                               pos
 138 )
 139 {
 140     wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
 141     wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
 142
 143     if (pos == GetCount())
 144         return DoAppend(rsItem);
 145
 146     int                             nIndex;
 147     LONG                            nIndexType = 0;
 148
 149     if (m_windowStyle & wxLB_SORT)
 150         nIndexType = LIT_SORTASCENDING;
 151     else
 152         nIndexType = pos;
 153     nIndex = (int)::WinSendMsg( GetHwnd()
 154                                ,LM_INSERTITEM
 155                                ,(MPARAM)nIndexType
 156                                ,(MPARAM)rsItem.c_str()
 157                               );
 158     return nIndex;
 159 } // end of wxChoice::DoInsert
 160
 161 void wxChoice::Delete(
 162   int                               n
 163 )
 164 {
 165     wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
 166     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, (MPARAM)0);
 167 } // end of wxChoice::Delete
 168
 169 void wxChoice::Clear()
 170 {
 171     Free();
 172     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 173 } // end of wxChoice::Clear
 174
 175 // ----------------------------------------------------------------------------
 176 // selection
 177 // ----------------------------------------------------------------------------
 178
 179 int wxChoice::GetSelection() const
 180 {
 181     return((int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0)));
 182 } // end of wxChoice::GetSelection
 183
 184 void wxChoice::SetSelection(
 185   int                               n
 186 )
 187 {
 188     ::WinSendMsg( GetHwnd()
 189                  ,LM_SELECTITEM
 190                  ,(MPARAM)n
 191                  ,(MPARAM)TRUE
 192                 );
 193 } // end of wxChoice::SetSelection
 194
 195 // ----------------------------------------------------------------------------
 196 // string list functions
 197 // ----------------------------------------------------------------------------
 198
 199 int wxChoice::GetCount() const
 200 {
 201     return((int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMCOUNT, (MPARAM)0, (MPARAM)0)));
 202 } // end of wxChoice::GetCount
 203
 204 int wxChoice::FindString(
 205   const wxString&                   rsStr
 206 ) const
 207 {
 208     int                             nPos;
 209     int                             nTextLength;
 210     PSZ                             zStr;
 211     int                             nItemCount;
 212
 213     nItemCount = (int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMCOUNT, (MPARAM)0, (MPARAM)0));
 214     for (nPos = 0; nPos < nItemCount; nPos++)
 215     {
 216         nTextLength = (int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)nPos, (MPARAM)0));
 217         zStr = new char[nTextLength + 1];
 218         ::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXT, MPFROM2SHORT((SHORT)nPos, (SHORT)nTextLength), (MPARAM)zStr);
 219         if (rsStr == (char*)zStr)
 220         {
 221             delete [] zStr;
 222             break;
 223         }
 224         delete [] zStr;
 225     }
 226     return nPos;
 227 } // end of wxChoice::FindString
 228
 229 void wxChoice::SetString(
 230   int                               n
 231 , const wxString&                   rsStr
 232 )
 233 {
 234     LONG                            nIndexType = 0;
 235     void*                           pData;
 236
 237     if ( m_clientDataItemsType != wxClientData_None )
 238     {
 239         pData = DoGetItemClientData(n);
 240     }
 241     else // no client data
 242     {
 243         pData = NULL;
 244     }
 245
 246     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, 0);
 247
 248     if (m_windowStyle & wxLB_SORT)
 249         nIndexType = LIT_SORTASCENDING;
 250     else
 251         nIndexType = LIT_END;
 252     ::WinSendMsg( GetHwnd()
 253                  ,LM_INSERTITEM
 254                  ,(MPARAM)nIndexType
 255                  ,(MPARAM)rsStr.c_str()
 256                 );
 257
 258     if (pData)
 259     {
 260         DoSetItemClientData( n
 261                             ,pData
 262                            );
 263     }
 264 } // end of wxChoice::SetString
 265
 266 wxString wxChoice::GetString(
 267   int                               n
 268 ) const
 269 {
 270     int                             nLen = 0;
 271     wxString                        sStr = "";
 272     char*                           zBuf;
 273
 274     nLen = (size_t)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)n, (MPARAM)0));
 275     if (nLen != LIT_ERROR && nLen > 0)
 276     {
 277         zBuf = new char[nLen + 1];
 278         ::WinSendMsg( GetHwnd()
 279                      ,LM_QUERYITEMTEXT
 280                      ,MPFROM2SHORT((SHORT)n, (SHORT)nLen)
 281                      ,(MPARAM)zBuf
 282                     );
 283         sStr = zBuf;
 284         delete [] zBuf;
 285     }
 286     return sStr;
 287 } // end of wxChoice::GetString
 288
 289 // ----------------------------------------------------------------------------
 290 // client data
 291 // ----------------------------------------------------------------------------
 292
 293 void wxChoice::DoSetItemClientData(
 294   int                               n
 295 , void*                             pClientData
 296 )
 297 {
 298     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)n, MPFROMP(pClientData));
 299 } // end of wxChoice::DoSetItemClientData
 300
 301 void* wxChoice::DoGetItemClientData( int n ) const
 302 {
 303     MRESULT                         rc = 0L;
 304
 305     rc = ::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, (MPARAM)n, (MPARAM)0);
 306     return((void*)rc);
 307 } // end of wxChoice::DoSetItemClientData
 308
 309 void wxChoice::DoSetItemClientObject(
 310   int                               n
 311 , wxClientData*                     pClientData
 312 )
 313 {
 314     DoSetItemClientData( n
 315                         ,pClientData
 316                        );
 317 } // end of wxChoice::DoSetItemClientObject
 318
 319 wxClientData* wxChoice::DoGetItemClientObject(
 320   int                               n
 321 ) const
 322 {
 323     return (wxClientData *)DoGetItemClientData(n);
 324 } // end of wxChoice::DoGetItemClientObject
 325
 326 // ----------------------------------------------------------------------------
 327 // wxOS2 specific helpers
 328 // ----------------------------------------------------------------------------
 329
 330 void wxChoice::DoSetSize(
 331   int                               nX
 332 , int                               nY
 333 , int                               nWidth
 334 , int                               nHeight
 335 , int                               nSizeFlags
 336 )
 337 {
 338     //
 339     // Ignore height parameter because height doesn't mean 'initially
 340     // displayed' height, it refers to the drop-down menu as well. The
 341     // wxWidgets interpretation is different; also, getting the size returns
 342     // the _displayed_ size (NOT the drop down menu size) so
 343     // setting-getting-setting size would not work.
 344     //
 345     wxControl::DoSetSize( nX
 346                          ,nY
 347                          ,nWidth
 348                          ,-1
 349                          ,nSizeFlags
 350                         );
 351 } // end of wxChoice::DoSetSize
 352
 353 wxSize wxChoice::DoGetBestSize() const
 354 {
 355     //
 356     // Find the widest string
 357     //
 358     int                             nLineWidth;
 359     int                             nChoiceWidth = 0;
 360     int                             nItems = GetCount();
 361     int                             nCx;
 362     int                             nCy;
 363
 364     for (int i = 0; i < nItems; i++)
 365     {
 366         wxString                    sStr(GetString(i));
 367
 368         GetTextExtent( sStr
 369                       ,&nLineWidth
 370                       ,NULL
 371                      );
 372         if (nLineWidth > nChoiceWidth)
 373             nChoiceWidth = nLineWidth;
 374     }
 375
 376     //
 377     // Give it some reasonable default value if there are no strings in the
 378     // list
 379     //
 380     if (nChoiceWidth == 0L)
 381         nChoiceWidth = 100L;
 382
 383     //
 384     // The combobox should be larger than the widest string
 385     //
 386     wxGetCharSize( GetHWND()
 387                   ,&nCx
 388                   ,&nCy
 389                   ,(wxFont*)&GetFont()
 390                  );
 391     nChoiceWidth += 5 * nCx;
 392
 393     //
 394     // Choice drop-down list depends on number of items (limited to 10)
 395     //
 396     size_t                          nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
 397     int                             nChoiceHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * nStrings;
 398
 399     return wxSize( nChoiceWidth
 400                   ,nChoiceHeight
 401                  );
 402 } // end of wxChoice::DoGetBestSize
 403
 404 MRESULT wxChoice::OS2WindowProc(
 405   WXUINT                            uMsg
 406 , WXWPARAM                          wParam
 407 , WXLPARAM                          lParam
 408 )
 409 {
 410     return wxWindow::OS2WindowProc( uMsg
 411                                    ,wParam
 412                                    ,lParam
 413                                   );
 414 } // end of wxChoice::OS2WindowProc
 415
 416 bool wxChoice::OS2Command(
 417   WXUINT                            uParam
 418 , WXWORD                            WXUNUSED(wId)
 419 )
 420 {
 421     if (uParam != LN_SELECT)
 422     {
 423         //
 424         // "selection changed" is the only event we're after
 425         //
 426         return false;
 427     }
 428     int                             n = GetSelection();
 429
 430     if (n > -1)
 431     {
 432         wxCommandEvent              vEvent( wxEVT_COMMAND_CHOICE_SELECTED
 433                                            ,m_windowId
 434                                           );
 435
 436         vEvent.SetInt(n);
 437         vEvent.SetEventObject(this);
 438         vEvent.SetString((char*)GetStringSelection().c_str());
 439         if (HasClientObjectData())
 440             vEvent.SetClientObject(GetClientObject(n));
 441         else if (HasClientUntypedData())
 442             vEvent.SetClientData(GetClientData(n));
 443         ProcessCommand(vEvent);
 444     }
 445     return true;
 446 } // end of wxChoice::OS2Command
 447
 448 void wxChoice::Free()
 449 {
 450     if (HasClientObjectData())
 451     {
 452         size_t                      nCount = GetCount();
 453
 454         for (size_t n = 0; n < nCount; n++)
 455         {
 456             delete GetClientObject(n);
 457         }
 458     }
 459 } // end of wxChoice::Free
 460
 461 #endif // wxUSE_CHOICE