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 (!OS2CreateControl( 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     wxFAIL_MSG(wxT("not implemented"));
 192
 193 #if 0 // should do this, but no Insert() so far
 194     Delete(n);
 195     Insert(n + 1, s);
 196 #endif
 197 } // end of wxChoice::SetString
 198
 199 wxString wxChoice::GetString(
 200   int                               n
 201 ) const
 202 {
 203     size_t                          nLen = 0;
 204     wxString                        sStr = "";
 205     char*                           zBuf;
 206
 207     nLen = (size_t)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)n, (MPARAM)0));
 208     if (nLen)
 209     {
 210         zBuf = new char[nLen + 1];
 211         ::WinSendMsg( GetHwnd()
 212                      ,LM_QUERYITEMTEXT
 213                      ,MPFROM2SHORT((SHORT)n, (SHORT)nLen)
 214                      ,(MPARAM)zBuf
 215                     );
 216         sStr = zBuf;
 217         delete [] zBuf;
 218     }
 219     return sStr;
 220 } // end of wxChoice::GetString
 221
 222 // ----------------------------------------------------------------------------
 223 // client data
 224 // ----------------------------------------------------------------------------
 225
 226 void wxChoice::DoSetItemClientData(
 227   int                               n
 228 , void*                             pClientData
 229 )
 230 {
 231     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)n, MPFROMP(pClientData));
 232 } // end of wxChoice::DoSetItemClientData
 233
 234 void* wxChoice::DoGetItemClientData( int n ) const
 235 {
 236     MRESULT                         rc = 0L;
 237
 238     rc = ::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, (MPARAM)n, (MPARAM)0);
 239     return((void*)rc);
 240 } // end of wxChoice::DoSetItemClientData
 241
 242 void wxChoice::DoSetItemClientObject(
 243   int                               n
 244 , wxClientData*                     pClientData
 245 )
 246 {
 247     DoSetItemClientData( n
 248                         ,pClientData
 249                        );
 250 } // end of wxChoice::DoSetItemClientObject
 251
 252 wxClientData* wxChoice::DoGetItemClientObject(
 253   int                               n
 254 ) const
 255 {
 256     return (wxClientData *)DoGetItemClientData(n);
 257 } // end of wxChoice::DoGetItemClientObject
 258
 259 // ----------------------------------------------------------------------------
 260 // wxOS2 specific helpers
 261 // ----------------------------------------------------------------------------
 262
 263 void wxChoice::DoSetSize(
 264   int                               nX
 265 , int                               nY
 266 , int                               nWidth
 267 , int                               nHeight
 268 , int                               nSizeFlags
 269 )
 270 {
 271     //
 272     // Ignore height parameter because height doesn't mean 'initially
 273     // displayed' height, it refers to the drop-down menu as well. The
 274     // wxWindows interpretation is different; also, getting the size returns
 275     // the _displayed_ size (NOT the drop down menu size) so
 276     // setting-getting-setting size would not work.
 277     //
 278     wxControl::DoSetSize( nX
 279                          ,nY
 280                          ,nWidth
 281                          ,-1
 282                          ,nSizeFlags
 283                         );
 284 } // end of wxChoice::DoSetSize
 285
 286 wxSize wxChoice::DoGetBestSize() const
 287 {
 288     //
 289     // Find the widest string
 290     //
 291     int                             nLineWidth;
 292     int                             nChoiceWidth = 0;
 293     int                             nItems = GetCount();
 294     int                             nCx;
 295     int                             nCy;
 296
 297     for (int i = 0; i < nItems; i++)
 298     {
 299         wxString                    sStr(GetString(i));
 300
 301         GetTextExtent( sStr
 302                       ,&nLineWidth
 303                       ,NULL
 304                      );
 305         if (nLineWidth > nChoiceWidth)
 306             nChoiceWidth = nLineWidth;
 307     }
 308
 309     //
 310     // Give it some reasonable default value if there are no strings in the
 311     // list
 312     //
 313     if (nChoiceWidth == 0L)
 314         nChoiceWidth = 100L;
 315
 316     //
 317     // The combobox should be larger than the widest string
 318     //
 319     wxGetCharSize( GetHWND()
 320                   ,&nCx
 321                   ,&nCy
 322                   ,(wxFont*)&GetFont()
 323                  );
 324     nChoiceWidth += 5 * nCx;
 325
 326     //
 327     // Choice drop-down list depends on number of items (limited to 10)
 328     //
 329     size_t                          nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
 330     int                             nChoiceHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * nStrings;
 331
 332     return wxSize( nChoiceWidth
 333                   ,nChoiceHeight
 334                  );
 335 } // end of wxChoice::DoGetBestSize
 336
 337 MRESULT wxChoice::OS2WindowProc(
 338   WXUINT                            uMsg
 339 , WXWPARAM                          wParam
 340 , WXLPARAM                          lParam
 341 )
 342 {
 343     return wxWindow::OS2WindowProc( uMsg
 344                                    ,wParam
 345                                    ,lParam
 346                                   );
 347 } // end of wxChoice::OS2WindowProc
 348
 349 bool wxChoice::OS2Command(
 350   WXUINT                            uParam
 351 , WXWORD                            WXUNUSED(wId)
 352 )
 353 {
 354     if (uParam != LN_SELECT)
 355     {
 356         //
 357         // "selection changed" is the only event we're after
 358         //
 359         return FALSE;
 360     }
 361     int                             n = GetSelection();
 362
 363     if (n > -1)
 364     {
 365         wxCommandEvent              vEvent( wxEVT_COMMAND_CHOICE_SELECTED
 366                                            ,m_windowId
 367                                           );
 368
 369         vEvent.SetInt(n);
 370         vEvent.SetEventObject(this);
 371         vEvent.SetString((char*)GetStringSelection().c_str());
 372         if (HasClientObjectData())
 373             vEvent.SetClientObject(GetClientObject(n));
 374         else if (HasClientUntypedData())
 375             vEvent.SetClientData(GetClientData(n));
 376         ProcessCommand(vEvent);
 377     }
 378     return TRUE;
 379 } // end of wxChoice::OS2Command
 380
 381 void wxChoice::Free()
 382 {
 383     if (HasClientObjectData())
 384     {
 385         size_t                      nCount = GetCount();
 386
 387         for (size_t n = 0; n < nCount; n++)
 388         {
 389             delete GetClientObject(n);
 390         }
 391     }
 392 } // end of wxhoice::Free