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