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