src/os2/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/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 #if wxUSE_CHOICE
  16
  17 #include "wx/choice.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/utils.h"
  21     #include "wx/log.h"
  22     #include "wx/settings.h"
  23 #endif
  24
  25 #include "wx/os2/private.h"
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  28
  29 bool wxChoice::Create(
  30   wxWindow*                         pParent
  31 , wxWindowID                        vId
  32 , const wxPoint&                    rPos
  33 , const wxSize&                     rSize
  34 , const wxArrayString&              asChoices
  35 , long                              lStyle
  36 , const wxValidator&                rValidator
  37 , const wxString&                   rsName
  38 )
  39 {
  40     wxCArrayString chs(asChoices);
  41
  42     return Create(pParent, vId, rPos, rSize, chs.GetCount(), chs.GetStrings(),
  43                   lStyle, rValidator, rsName);
  44 }
  45
  46 bool wxChoice::Create(
  47   wxWindow*                         pParent
  48 , wxWindowID                        vId
  49 , const wxPoint&                    rPos
  50 , const wxSize&                     rSize
  51 , int                               n
  52 , const wxString                    asChoices[]
  53 , long                              lStyle
  54 , const wxValidator&                rValidator
  55 , const wxString&                   rsName
  56 )
  57 {
  58     long                            lSstyle;
  59
  60     if (!CreateControl( pParent
  61                        ,vId
  62                        ,rPos
  63                        ,rSize
  64                        ,lStyle
  65                        ,rValidator
  66                        ,rsName
  67                       ))
  68         return false;
  69     lSstyle = CBS_DROPDOWNLIST |
  70               WS_TABSTOP       |
  71               WS_VISIBLE;
  72
  73     // clipping siblings does not yet work
  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
  94     // initialize the controls contents
  95     for (int i = 0; i < n; i++)
  96     {
  97         Append(asChoices[i]);
  98     }
  99     SetSize( rPos.x
 100             ,rPos.y
 101             ,rSize.x
 102             ,rSize.y
 103            );
 104
 105     // Set height to use with sizers i.e. without the dropdown listbox
 106     wxFont vFont = GetFont();
 107     int  nEditHeight;
 108     wxGetCharSize( GetHWND(), NULL, &nEditHeight, &vFont );
 109     nEditHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nEditHeight);
 110     SetBestFittingSize(wxSize(-1,nEditHeight+4));   // +2x2 for the border
 111
 112     return true;
 113 } // end of wxChoice::Create
 114
 115 wxChoice::~wxChoice()
 116 {
 117     Free();
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // adding/deleting items to/from the list
 122 // ----------------------------------------------------------------------------
 123
 124 int wxChoice::DoAppend(
 125   const wxString&                   rsItem
 126 )
 127 {
 128     int                             nIndex;
 129     LONG                            nIndexType = 0;
 130     if (m_windowStyle & wxCB_SORT)
 131         nIndexType = LIT_SORTASCENDING;
 132     else
 133         nIndexType = LIT_END;
 134     nIndex = (int)::WinSendMsg( GetHwnd()
 135                                ,LM_INSERTITEM
 136                                ,(MPARAM)nIndexType
 137                                ,(MPARAM)rsItem.c_str()
 138                               );
 139     return nIndex;
 140 } // end of wxChoice::DoAppend
 141
 142 int wxChoice::DoInsert( const wxString& rsItem, unsigned int pos )
 143 {
 144     wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
 145     wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
 146
 147     if (pos == GetCount())
 148         return DoAppend(rsItem);
 149
 150     int  nIndex;
 151     LONG nIndexType = 0;
 152
 153     if (m_windowStyle & wxCB_SORT)
 154         nIndexType = LIT_SORTASCENDING;
 155     else
 156         nIndexType = pos;
 157     nIndex = (int)::WinSendMsg( GetHwnd()
 158                                ,LM_INSERTITEM
 159                                ,(MPARAM)nIndexType
 160                                ,(MPARAM)rsItem.c_str()
 161                               );
 162     return nIndex;
 163 } // end of wxChoice::DoInsert
 164
 165 void wxChoice::Delete(unsigned int n)
 166 {
 167     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 168
 169     if ( HasClientObjectData() )
 170     {
 171         delete GetClientObject(n);
 172     }
 173
 174     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, (MPARAM)0);
 175 } // end of wxChoice::Delete
 176
 177 void wxChoice::Clear()
 178 {
 179     Free();
 180     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 181 } // end of wxChoice::Clear
 182
 183 // ----------------------------------------------------------------------------
 184 // selection
 185 // ----------------------------------------------------------------------------
 186
 187 int wxChoice::GetSelection() const
 188 {
 189     return((int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0)));
 190 } // end of wxChoice::GetSelection
 191
 192 void wxChoice::SetSelection(
 193   int                               n
 194 )
 195 {
 196     ::WinSendMsg( GetHwnd()
 197                  ,LM_SELECTITEM
 198                  ,(MPARAM)n
 199                  ,(MPARAM)TRUE
 200                 );
 201 } // end of wxChoice::SetSelection
 202
 203 // ----------------------------------------------------------------------------
 204 // string list functions
 205 // ----------------------------------------------------------------------------
 206
 207 unsigned int wxChoice::GetCount() const
 208 {
 209     return((unsigned int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMCOUNT, (MPARAM)0, (MPARAM)0)));
 210 } // end of wxChoice::GetCount
 211
 212 void wxChoice::SetString(unsigned int n, const wxString& rsStr)
 213 {
 214     LONG  nIndexType = 0;
 215     void* pData;
 216
 217     if ( m_clientDataItemsType != wxClientData_None )
 218     {
 219         pData = DoGetItemClientData(n);
 220     }
 221     else // no client data
 222     {
 223         pData = NULL;
 224     }
 225
 226     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, 0);
 227
 228     if (m_windowStyle & wxCB_SORT)
 229         nIndexType = LIT_SORTASCENDING;
 230     else
 231         nIndexType = LIT_END;
 232     ::WinSendMsg( GetHwnd()
 233                  ,LM_INSERTITEM
 234                  ,(MPARAM)nIndexType
 235                  ,(MPARAM)rsStr.c_str()
 236                 );
 237
 238     if (pData)
 239     {
 240         DoSetItemClientData(n, pData);
 241     }
 242 } // end of wxChoice::SetString
 243
 244 wxString wxChoice::GetString(unsigned int n) const
 245 {
 246     int      nLen = 0;
 247     wxString sStr = wxEmptyString;
 248     wxChar*  zBuf;
 249
 250     nLen = (size_t)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)n, (MPARAM)0));
 251     if (nLen != LIT_ERROR && nLen > 0)
 252     {
 253         zBuf = new wxChar[++nLen];
 254         ::WinSendMsg( GetHwnd()
 255                      ,LM_QUERYITEMTEXT
 256                      ,MPFROM2SHORT((SHORT)n, (SHORT)nLen)
 257                      ,(MPARAM)zBuf
 258                     );
 259         sStr = zBuf;
 260         delete [] zBuf;
 261     }
 262     return sStr;
 263 } // end of wxChoice::GetString
 264
 265 // ----------------------------------------------------------------------------
 266 // client data
 267 // ----------------------------------------------------------------------------
 268
 269 void wxChoice::DoSetItemClientData(unsigned int n, void* pClientData)
 270 {
 271     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)n, MPFROMP(pClientData));
 272 } // end of wxChoice::DoSetItemClientData
 273
 274 void* wxChoice::DoGetItemClientData(unsigned int n) const
 275 {
 276     MRESULT rc = ::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, (MPARAM)n, (MPARAM)0);
 277     return((void*)rc);
 278 } // end of wxChoice::DoGetItemClientData
 279
 280 void wxChoice::DoSetItemClientObject(unsigned int n, wxClientData* pClientData)
 281 {
 282     DoSetItemClientData(n, pClientData);
 283 } // end of wxChoice::DoSetItemClientObject
 284
 285 wxClientData* wxChoice::DoGetItemClientObject(unsigned int n) const
 286 {
 287     return (wxClientData *)DoGetItemClientData(n);
 288 } // end of wxChoice::DoGetItemClientObject
 289
 290 // ----------------------------------------------------------------------------
 291 // wxOS2 specific helpers
 292 // ----------------------------------------------------------------------------
 293
 294 void wxChoice::DoSetSize(int nX,
 295                          int nY,
 296                          int nWidth,
 297                          int WXUNUSED(nHeight),
 298                          int nSizeFlags)
 299 {
 300     //
 301     // Ignore height parameter because height doesn't mean 'initially
 302     // displayed' height, it refers to the drop-down menu as well. The
 303     // wxWidgets interpretation is different; also, getting the size returns
 304     // the _displayed_ size (NOT the drop down menu size) so
 305     // setting-getting-setting size would not work.
 306     //
 307     wxControl::DoSetSize( nX
 308                          ,nY
 309                          ,nWidth
 310                          ,wxDefaultCoord
 311                          ,nSizeFlags
 312                         );
 313 } // end of wxChoice::DoSetSize
 314
 315 wxSize wxChoice::DoGetBestSize() const
 316 {
 317     //
 318     // Find the widest string
 319     //
 320     int    nLineWidth;
 321     int    nChoiceWidth = 0;
 322     int    nCx;
 323     int    nCy;
 324     wxFont vFont = (wxFont)GetFont();
 325
 326     const unsigned int nItems = GetCount();
 327
 328     for (unsigned int i = 0; i < nItems; i++)
 329     {
 330         wxString sStr(GetString(i));
 331         GetTextExtent( sStr, &nLineWidth, NULL );
 332         if (nLineWidth > nChoiceWidth)
 333             nChoiceWidth = nLineWidth;
 334     }
 335
 336     //
 337     // Give it some reasonable default value if there are no strings in the
 338     // list
 339     //
 340     if (nChoiceWidth == 0L)
 341         nChoiceWidth = 100L;
 342
 343     //
 344     // The combobox should be larger than the widest string
 345     //
 346     wxGetCharSize( GetHWND(), &nCx, &nCy, &vFont );
 347     nChoiceWidth += 5 * nCx;
 348
 349     //
 350     // Choice drop-down list depends on number of items (limited to 10)
 351     //
 352     size_t nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
 353     int    nChoiceHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * nStrings;
 354
 355     return wxSize(nChoiceWidth, nChoiceHeight);
 356 } // end of wxChoice::DoGetBestSize
 357
 358 MRESULT wxChoice::OS2WindowProc(
 359   WXUINT                            uMsg
 360 , WXWPARAM                          wParam
 361 , WXLPARAM                          lParam
 362 )
 363 {
 364     return wxWindow::OS2WindowProc( uMsg
 365                                    ,wParam
 366                                    ,lParam
 367                                   );
 368 } // end of wxChoice::OS2WindowProc
 369
 370 bool wxChoice::OS2Command(
 371   WXUINT                            uParam
 372 , WXWORD                            WXUNUSED(wId)
 373 )
 374 {
 375     if (uParam != LN_SELECT)
 376     {
 377         //
 378         // "selection changed" is the only event we're after
 379         //
 380         return false;
 381     }
 382     int                             n = GetSelection();
 383
 384     if (n > -1)
 385     {
 386         wxCommandEvent              vEvent( wxEVT_COMMAND_CHOICE_SELECTED
 387                                            ,m_windowId
 388                                           );
 389
 390         vEvent.SetInt(n);
 391         vEvent.SetEventObject(this);
 392         vEvent.SetString(GetStringSelection());
 393         if (HasClientObjectData())
 394             vEvent.SetClientObject(GetClientObject(n));
 395         else if (HasClientUntypedData())
 396             vEvent.SetClientData(GetClientData(n));
 397         ProcessCommand(vEvent);
 398     }
 399     return true;
 400 } // end of wxChoice::OS2Command
 401
 402 void wxChoice::Free()
 403 {
 404     if (HasClientObjectData())
 405     {
 406         const unsigned int nCount = GetCount();
 407
 408         for (unsigned int n = 0; n < nCount; n++)
 409         {
 410             delete GetClientObject(n);
 411         }
 412     }
 413 } // end of wxChoice::Free
 414
 415 #endif // wxUSE_CHOICE