src/os2/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/combobox.cpp
   3 // Purpose:     wxComboBox class
   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_COMBOBOX
  16
  17 #include "wx/combobox.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/settings.h"
  21 #endif
  22
  23 #include "wx/clipbrd.h"
  24 #include "wx/os2/private.h"
  25
  26 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
  27
  28 MRESULT EXPENTRY wxComboEditWndProc( HWND   hWnd
  29                                     ,UINT   uMessage
  30                                     ,MPARAM wParam
  31                                     ,MPARAM lParam
  32                                    );
  33 //
  34 // The pointer to standard wnd proc
  35 //
  36 static WXFARPROC gfnWndprocEdit     = (WXFARPROC)NULL;
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
  39
  40 bool wxComboBox::OS2Command( WXUINT uParam, WXWORD WXUNUSED(wId) )
  41 {
  42     long lSel = GetSelection();
  43     wxString sValue;
  44
  45     switch (uParam)
  46     {
  47         case CBN_LBSELECT:
  48             if (lSel > -1)
  49             {
  50                 wxCommandEvent vEvent( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
  51
  52                 vEvent.SetInt(lSel);
  53                 vEvent.SetEventObject(this);
  54                 vEvent.SetString(GetStringSelection());
  55
  56                 ProcessCommand(vEvent);
  57             }
  58             break;
  59
  60         case CBN_EFCHANGE:
  61             {
  62                 wxCommandEvent vEvent( wxEVT_COMMAND_TEXT_UPDATED, GetId() );
  63
  64                 if (lSel == -1L)
  65                     sValue = GetValue();
  66                 else
  67                     sValue = GetStringSelection();
  68                 vEvent.SetString(sValue);
  69                 vEvent.SetEventObject(this);
  70                 ProcessCommand(vEvent);
  71             }
  72             break;
  73     }
  74     //
  75     // There is no return value for the CBN_ notifications, so always return
  76     // false from here to pass the message to DefWindowProc()
  77     //
  78     return false;
  79 } // end of wxComboBox::OS2Command
  80
  81 bool wxComboBox::Create(
  82   wxWindow*                         pParent
  83 , wxWindowID                        vId
  84 , const wxString&                   rsValue
  85 , const wxPoint&                    rPos
  86 , const wxSize&                     rSize
  87 , const wxArrayString&              asChoices
  88 , long                              lStyle
  89 , const wxValidator&                rValidator
  90 , const wxString&                   rsName
  91 )
  92 {
  93     wxCArrayString chs(asChoices);
  94
  95     return Create(pParent, vId, rsValue, rPos, rSize, chs.GetCount(),
  96                   chs.GetStrings(), lStyle, rValidator, rsName);
  97 }
  98
  99 bool wxComboBox::Create(
 100   wxWindow*                         pParent
 101 , wxWindowID                        vId
 102 , const wxString&                   rsValue
 103 , const wxPoint&                    rPos
 104 , const wxSize&                     rSize
 105 , int                               n
 106 , const wxString                    asChoices[]
 107 , long                              lStyle
 108 , const wxValidator&                rValidator
 109 , const wxString&                   rsName
 110 )
 111 {
 112     m_isShown = false;
 113
 114     if (!CreateControl( pParent
 115                        ,vId
 116                        ,rPos
 117                        ,rSize
 118                        ,lStyle
 119                        ,rValidator
 120                        ,rsName
 121                       ))
 122         return false;
 123
 124     //
 125     // Get the right style
 126     //
 127     long                            lSstyle = 0L;
 128
 129     lSstyle = WS_TABSTOP   |
 130               WS_VISIBLE;
 131
 132     // clipping siblings does not yet work
 133     // if (lStyle & wxCLIP_SIBLINGS )
 134     //     lSstyle |= WS_CLIPSIBLINGS;
 135     if (lStyle & wxCB_READONLY)
 136         lSstyle |= CBS_DROPDOWNLIST;
 137     else if (lStyle & wxCB_SIMPLE)
 138         lSstyle |= CBS_SIMPLE; // A list (shown always) and edit control
 139     else
 140         lSstyle |= CBS_DROPDOWN;
 141
 142
 143     if (!OS2CreateControl( _T("COMBOBOX")
 144                           ,lSstyle
 145                          ))
 146         return false;
 147
 148     //
 149     // A choice/combobox normally has a white background (or other, depending
 150     // on global settings) rather than inheriting the parent's background colour.
 151     //
 152     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 153
 154     for (int i = 0; i < n; i++)
 155     {
 156         Append(asChoices[i]);
 157     }
 158
 159     SetSize( rPos.x
 160             ,rPos.y
 161             ,rSize.x
 162             ,rSize.y
 163            );
 164
 165     // Set height to use with sizers i.e. without the dropdown listbox
 166     wxFont vFont = GetFont();
 167     int nEditHeight;
 168     wxGetCharSize( GetHWND(), NULL, &nEditHeight, &vFont );
 169     nEditHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nEditHeight);
 170     SetInitialSize(wxSize(-1,nEditHeight+4));   // +2x2 for the border
 171
 172     if (!rsValue.empty())
 173     {
 174         SetValue(rsValue);
 175     }
 176     gfnWndprocEdit = (WXFARPROC)::WinSubclassWindow( (HWND)GetHwnd()
 177                                                     ,(PFNWP)wxComboEditWndProc
 178                                                    );
 179     ::WinSetWindowULong(GetHwnd(), QWL_USER, (ULONG)this);
 180     Show(true);
 181     return true;
 182 } // end of wxComboBox::Create
 183
 184 wxString wxComboBox::GetValue() const
 185 {
 186     return wxGetWindowText(GetHwnd());
 187 }
 188
 189 void wxComboBox::SetValue(
 190   const wxString&                   rsValue
 191 )
 192 {
 193     if ( HasFlag(wxCB_READONLY) )
 194         SetStringSelection(rsValue);
 195     else
 196         ::WinSetWindowText(GetHwnd(), rsValue.c_str());
 197 } // end of wxComboBox::SetValue
 198
 199 //
 200 // Clipboard operations
 201 //
 202 void wxComboBox::Copy()
 203 {
 204     HWND                            hWnd = GetHwnd();
 205
 206     ::WinSendMsg(hWnd, EM_COPY, (MPARAM)0, (MPARAM)0);
 207 } // end of wxComboBox::Copy
 208
 209 void wxComboBox::Cut()
 210 {
 211     HWND                            hWnd = GetHwnd();
 212
 213     ::WinSendMsg(hWnd, EM_CUT, (MPARAM)0, (MPARAM)0);
 214 } // end of wxComboBox::Cut
 215
 216 void wxComboBox::Paste()
 217 {
 218     HWND                            hWnd = GetHwnd();
 219
 220     ::WinSendMsg(hWnd, EM_PASTE, (MPARAM)0, (MPARAM)0);
 221 } // end of wxComboBox::Paste
 222
 223 void wxComboBox::SetEditable(
 224   bool                              bEditable
 225 )
 226 {
 227     HWND                            hWnd = GetHwnd();
 228
 229     ::WinSendMsg(hWnd, EM_SETREADONLY, (MPARAM)!bEditable, (MPARAM)0L);
 230 } // end of wxComboBox::SetEditable
 231
 232 void wxComboBox::SetInsertionPoint(
 233   long                              lPos
 234 )
 235 {
 236     HWND                            hWnd = GetHwnd();
 237
 238     ::WinSendMsg(hWnd, EM_SETFIRSTCHAR, MPFROMLONG(lPos), (MPARAM)0);
 239 } // end of wxComboBox::SetInsertionPoint
 240
 241 void wxComboBox::SetInsertionPointEnd()
 242 {
 243     wxTextPos                       lPos = GetLastPosition();
 244
 245     SetInsertionPoint(lPos);
 246 } // end of wxComboBox::SetInsertionPointEnd
 247
 248 long wxComboBox::GetInsertionPoint() const
 249 {
 250     long                            lPos = LONGFROMMR(::WinSendMsg( GetHwnd()
 251                                                                    ,LM_QUERYSELECTION
 252                                                                    ,(MPARAM)0
 253                                                                    ,(MPARAM)0
 254                                                                   ));
 255    if (lPos == LIT_NONE)
 256         return wxNOT_FOUND;
 257    return lPos;
 258 } // end of wxComboBox::GetInsertionPoint
 259
 260 wxTextPos wxComboBox::GetLastPosition() const
 261 {
 262     long                            lLineLength = 0L;
 263     WNDPARAMS                       vParams;
 264
 265     //
 266     // Get number of characters in the last (only) line. We'll add this to the character
 267     // index for the last line, 1st position.
 268     //
 269
 270
 271     vParams.fsStatus = WPM_CCHTEXT;
 272     if (::WinSendMsg( GetHwnd()
 273                      ,WM_QUERYWINDOWPARAMS
 274                      ,&vParams
 275                      ,0
 276                     ))
 277     {
 278         lLineLength = (long)vParams.cchText;
 279     }
 280     else
 281         lLineLength = 0L;
 282     return lLineLength;
 283 } // end of wxComboBox::GetLastPosition
 284
 285 void wxComboBox::Replace( long lFrom,
 286                           long lTo,
 287                           const wxString& rsValue )
 288 {
 289 #if wxUSE_CLIPBOARD
 290     HWND                            hWnd = GetHwnd();
 291
 292     //
 293     // Set selection and remove it
 294     //
 295     ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 296     ::WinSendMsg(hWnd, EM_CUT, (MPARAM)0, (MPARAM)0);
 297
 298     //
 299     // Now replace with 'value', by pasting.
 300     //
 301     wxSetClipboardData( wxDF_TEXT
 302                        ,rsValue.c_str()
 303                        ,0
 304                        ,0
 305                       );
 306
 307     //
 308     // Paste into edit control
 309     //
 310     ::WinSendMsg(hWnd, EM_PASTE, (MPARAM)0, (MPARAM)0L);
 311 #else
 312     wxUnusedVar(lFrom);
 313     wxUnusedVar(lTo);
 314     wxUnusedVar(rsValue);
 315 #endif
 316 } // end of wxComboBox::Replace
 317
 318 void wxComboBox::Remove( long lFrom, long lTo)
 319 {
 320 #if wxUSE_CLIPBOARD
 321     HWND                            hWnd = GetHwnd();
 322
 323     ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 324     ::WinSendMsg(hWnd, EM_CUT, (MPARAM)0, (MPARAM)0);
 325 #else
 326     wxUnusedVar(lFrom);
 327     wxUnusedVar(lTo);
 328 #endif
 329 } // end of wxComboBox::Remove
 330
 331 void wxComboBox::SetSelection( long lFrom, long lTo )
 332 {
 333     HWND hWnd = GetHwnd();
 334     long lFromChar = 0;
 335     long lToChar   = 0;
 336
 337     //
 338     // If from and to are both -1, it means
 339     // (in wxWidgets) that all text should be selected.
 340     // This translates into Windows convention
 341     //
 342     if ((lFrom == -1L) && (lTo == -1L))
 343     {
 344         lFromChar = 0;
 345         lToChar = -1;
 346     }
 347
 348     ::WinSendMsg( hWnd
 349                  ,EM_SETSEL
 350                  ,MPFROM2SHORT((USHORT)lFromChar, (USHORT)lToChar)
 351                  ,(MPARAM)0
 352                 );
 353 } // end of wxComboBox::SetSelection
 354
 355 bool wxComboBox::ProcessEditMsg(
 356   WXUINT                            uMsg
 357 , WXWPARAM                          wParam
 358 , WXLPARAM                          lParam)
 359 {
 360     SHORT                           vFlag;
 361     switch (uMsg)
 362     {
 363         case WM_CHAR:
 364             vFlag = SHORT1FROMMP(wParam);
 365             switch(vFlag)
 366             {
 367                 case KC_CHAR:
 368                     return (HandleChar( wParam
 369                                        ,lParam
 370                                        ,true /* isASCII */
 371                                       ));
 372
 373                 case KC_PREVDOWN:
 374                     return (HandleKeyDown( wParam
 375                                           ,lParam
 376                                          ));
 377
 378                 case KC_KEYUP:
 379                     return (HandleKeyUp( wParam
 380                                         ,lParam
 381                                        ));
 382             }
 383             break;
 384
 385         case WM_SETFOCUS:
 386             if (SHORT1FROMMP((MPARAM)lParam) == TRUE)
 387                 return(HandleSetFocus((WXHWND)(HWND)wParam));
 388             else
 389                 return(HandleKillFocus((WXHWND)(HWND)wParam));
 390     }
 391     return false;
 392 } // end of wxComboBox::ProcessEditMsg
 393
 394 MRESULT EXPENTRY wxComboEditWndProc(
 395   HWND                              hWnd
 396 , UINT                              uMessage
 397 , MPARAM                            wParam
 398 , MPARAM                            lParam
 399 )
 400 {
 401     switch (uMessage)
 402     {
 403         //
 404         // Forward some messages to the combobox
 405         //
 406         case WM_SETFOCUS:
 407         case WM_CHAR:
 408             {
 409                 wxComboBox* pCombo = (wxComboBox *)::WinQueryWindowULong( hWnd
 410                                                                          ,QWL_USER
 411                                                                         );
 412
 413                 if (pCombo->ProcessEditMsg( uMessage
 414                                            ,wParam
 415                                            ,lParam
 416                                           ))
 417                     return ((MRESULT)0);
 418             }
 419             break;
 420
 421         //
 422         // TODO: Deal with tooltips here
 423         //
 424     }
 425     return (gfnWndprocEdit(hWnd, (ULONG)uMessage, (MPARAM)wParam, (MPARAM)lParam));
 426 } // end of wxComboEditWndProc
 427
 428 #endif
 429  // wxUSE_COMBOBOX