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, wxControlWithItems)
  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     SetInitialSize(wxSize(-1,nEditHeight+4));   // +2x2 for the border
 111
 112     return true;
 113 } // end of wxChoice::Create
 114
 115 wxChoice::~wxChoice()
 116 {
 117     Clear();
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // adding/deleting items to/from the list
 122 // ----------------------------------------------------------------------------
 123
 124 int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items
 125                            , unsigned int pos
 126                            , void **clientData
 127                            , wxClientDataType type
 128                            )
 129 {
 130     int                             nIndex = wxNOT_FOUND;
 131     LONG                            nIndexType = 0;
 132     bool                            incrementPos = false;
 133     if ( IsSorted() )
 134         nIndexType = LIT_SORTASCENDING;
 135     else if (pos == GetCount())
 136         nIndexType = LIT_END;
 137     else
 138     {
 139         nIndexType = pos;
 140         incrementPos = true;
 141     }
 142
 143     const unsigned int count = items.GetCount();
 144     for( unsigned int i = 0; i < count; ++i )
 145     {
 146         nIndex = (int)::WinSendMsg( GetHwnd()
 147                                    ,LM_INSERTITEM
 148                                    ,(MPARAM)nIndexType
 149                                    ,(MPARAM)items[i].wx_str()
 150                                   );
 151         if (nIndex < 0)
 152         {
 153             nIndex = wxNOT_FOUND;
 154             break;
 155         }
 156         AssignNewItemClientData(nIndex, clientData, i, type);
 157
 158         if (incrementPos)
 159             ++nIndexType;
 160     }
 161     return nIndex;
 162 } // end of wxChoice::DoInsertAppendItemsWithData
 163
 164 void wxChoice::DoDeleteOneItem(unsigned int n)
 165 {
 166     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 167
 168     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, (MPARAM)0);
 169 } // end of wxChoice::Delete
 170
 171 void wxChoice::DoClear()
 172 {
 173     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 174 } // end of wxChoice::Clear
 175
 176 // ----------------------------------------------------------------------------
 177 // selection
 178 // ----------------------------------------------------------------------------
 179
 180 int wxChoice::GetSelection() const
 181 {
 182     return((int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0)));
 183 } // end of wxChoice::GetSelection
 184
 185 void wxChoice::SetSelection(
 186   int                               n
 187 )
 188 {
 189     ::WinSendMsg( GetHwnd()
 190                  ,LM_SELECTITEM
 191                  ,(MPARAM)n
 192                  ,(MPARAM)TRUE
 193                 );
 194 } // end of wxChoice::SetSelection
 195
 196 // ----------------------------------------------------------------------------
 197 // string list functions
 198 // ----------------------------------------------------------------------------
 199
 200 unsigned int wxChoice::GetCount() const
 201 {
 202     return((unsigned int)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMCOUNT, (MPARAM)0, (MPARAM)0)));
 203 } // end of wxChoice::GetCount
 204
 205 void wxChoice::SetString(unsigned int n, const wxString& rsStr)
 206 {
 207     LONG  nIndexType = 0;
 208     void* pData;
 209
 210     if ( m_clientDataItemsType != wxClientData_None )
 211     {
 212         pData = DoGetItemClientData(n);
 213     }
 214     else // no client data
 215     {
 216         pData = NULL;
 217     }
 218
 219     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, 0);
 220
 221     if (m_windowStyle & wxCB_SORT)
 222         nIndexType = LIT_SORTASCENDING;
 223     else
 224         nIndexType = LIT_END;
 225     ::WinSendMsg( GetHwnd()
 226                  ,LM_INSERTITEM
 227                  ,(MPARAM)nIndexType
 228                  ,(MPARAM)rsStr.wx_str()
 229                 );
 230
 231     if (pData)
 232     {
 233         DoSetItemClientData(n, pData);
 234     }
 235 } // end of wxChoice::SetString
 236
 237 wxString wxChoice::GetString(unsigned int n) const
 238 {
 239     int      nLen = 0;
 240     wxString sStr = wxEmptyString;
 241     wxChar*  zBuf;
 242
 243     nLen = (size_t)LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)n, (MPARAM)0));
 244     if (nLen != LIT_ERROR && nLen > 0)
 245     {
 246         zBuf = new wxChar[++nLen];
 247         ::WinSendMsg( GetHwnd()
 248                      ,LM_QUERYITEMTEXT
 249                      ,MPFROM2SHORT((SHORT)n, (SHORT)nLen)
 250                      ,(MPARAM)zBuf
 251                     );
 252         sStr = zBuf;
 253         delete [] zBuf;
 254     }
 255     return sStr;
 256 } // end of wxChoice::GetString
 257
 258 // ----------------------------------------------------------------------------
 259 // client data
 260 // ----------------------------------------------------------------------------
 261
 262 void wxChoice::DoSetItemClientData(unsigned int n, void* pClientData)
 263 {
 264     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)n, MPFROMP(pClientData));
 265 } // end of wxChoice::DoSetItemClientData
 266
 267 void* wxChoice::DoGetItemClientData(unsigned int n) const
 268 {
 269     MRESULT rc = ::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, (MPARAM)n, (MPARAM)0);
 270     return((void*)rc);
 271 } // end of wxChoice::DoGetItemClientData
 272
 273 // ----------------------------------------------------------------------------
 274 // wxOS2 specific helpers
 275 // ----------------------------------------------------------------------------
 276
 277 void wxChoice::DoSetSize(int nX,
 278                          int nY,
 279                          int nWidth,
 280                          int WXUNUSED(nHeight),
 281                          int nSizeFlags)
 282 {
 283     //
 284     // Ignore height parameter because height doesn't mean 'initially
 285     // displayed' height, it refers to the drop-down menu as well. The
 286     // wxWidgets interpretation is different; also, getting the size returns
 287     // the _displayed_ size (NOT the drop down menu size) so
 288     // setting-getting-setting size would not work.
 289     //
 290     wxControl::DoSetSize( nX
 291                          ,nY
 292                          ,nWidth
 293                          ,wxDefaultCoord
 294                          ,nSizeFlags
 295                         );
 296 } // end of wxChoice::DoSetSize
 297
 298 wxSize wxChoice::DoGetBestSize() const
 299 {
 300     //
 301     // Find the widest string
 302     //
 303     int    nLineWidth;
 304     int    nChoiceWidth = 0;
 305     int    nCx;
 306     int    nCy;
 307     wxFont vFont = (wxFont)GetFont();
 308
 309     const unsigned int nItems = GetCount();
 310
 311     for (unsigned int i = 0; i < nItems; i++)
 312     {
 313         wxString sStr(GetString(i));
 314         GetTextExtent( sStr, &nLineWidth, NULL );
 315         if (nLineWidth > nChoiceWidth)
 316             nChoiceWidth = nLineWidth;
 317     }
 318
 319     //
 320     // Give it some reasonable default value if there are no strings in the
 321     // list
 322     //
 323     if (nChoiceWidth == 0L)
 324         nChoiceWidth = 100L;
 325
 326     //
 327     // The combobox should be larger than the widest string
 328     //
 329     wxGetCharSize( GetHWND(), &nCx, &nCy, &vFont );
 330     nChoiceWidth += 5 * nCx;
 331
 332     //
 333     // Choice drop-down list depends on number of items (limited to 10)
 334     //
 335     size_t nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
 336     int    nChoiceHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * nStrings;
 337
 338     return wxSize(nChoiceWidth, nChoiceHeight);
 339 } // end of wxChoice::DoGetBestSize
 340
 341 MRESULT wxChoice::OS2WindowProc(
 342   WXUINT                            uMsg
 343 , WXWPARAM                          wParam
 344 , WXLPARAM                          lParam
 345 )
 346 {
 347     return wxWindow::OS2WindowProc( uMsg
 348                                    ,wParam
 349                                    ,lParam
 350                                   );
 351 } // end of wxChoice::OS2WindowProc
 352
 353 bool wxChoice::OS2Command(
 354   WXUINT                            uParam
 355 , WXWORD                            WXUNUSED(wId)
 356 )
 357 {
 358     if (uParam != LN_SELECT)
 359     {
 360         //
 361         // "selection changed" is the only event we're after
 362         //
 363         return false;
 364     }
 365     int                             n = GetSelection();
 366
 367     if (n > -1)
 368     {
 369         wxCommandEvent              vEvent( wxEVT_COMMAND_CHOICE_SELECTED
 370                                            ,m_windowId
 371                                           );
 372
 373         vEvent.SetInt(n);
 374         vEvent.SetEventObject(this);
 375         vEvent.SetString(GetStringSelection());
 376         if (HasClientObjectData())
 377             vEvent.SetClientObject(GetClientObject(n));
 378         else if (HasClientUntypedData())
 379             vEvent.SetClientData(GetClientData(n));
 380         ProcessCommand(vEvent);
 381     }
 382     return true;
 383 } // end of wxChoice::OS2Command
 384
 385 #endif // wxUSE_CHOICE