src/os2/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/17/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ----------------------------------------------------------------------------
  13 // headers
  14 // ----------------------------------------------------------------------------
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/textctrl.h"
  21     #include "wx/scrolwin.h"
  22     #include "wx/settings.h"
  23     #include "wx/brush.h"
  24     #include "wx/utils.h"
  25     #include "wx/log.h"
  26 #endif
  27
  28 #include "wx/app.h"
  29
  30 #if wxUSE_CLIPBOARD
  31     #include "wx/clipbrd.h"
  32 #endif
  33
  34 #include "wx/textfile.h"
  35
  36 #include "wx/os2/private.h"
  37
  38 #include <string.h>
  39 #include <stdlib.h>
  40 #include <sys/types.h>
  41
  42 #if wxUSE_IOSTREAMH
  43 #   include <fstream.h>
  44 #else
  45 #   include <fstream>
  46 #endif
  47
  48 #if !defined(MLE_INDEX)
  49 #define MLE_INDEX  0
  50 #define MLE_RGB    1
  51 #endif
  52
  53
  54 // ----------------------------------------------------------------------------
  55 // event tables and other macros
  56 // ----------------------------------------------------------------------------
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  59
  60 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  61     EVT_CHAR(wxTextCtrl::OnChar)
  62     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  63
  64     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  65     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  66     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  67     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  68     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  69
  70     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  71     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  72     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  73     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  74     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  75 END_EVENT_TABLE()
  76
  77
  78 // ============================================================================
  79 // implementation
  80 // ============================================================================
  81
  82 // ----------------------------------------------------------------------------
  83 // creation
  84 // ----------------------------------------------------------------------------
  85
  86 wxTextCtrl::wxTextCtrl()
  87 {
  88 }
  89
  90 wxTextCtrl::~wxTextCtrl()
  91 {
  92 }
  93
  94 bool wxTextCtrl::Create(
  95   wxWindow*                         pParent
  96 , wxWindowID                        vId
  97 , const wxString&                   rsValue
  98 , const wxPoint&                    rPos
  99 , const wxSize&                     rSize
 100 , long                              lStyle
 101 , const wxValidator&                rValidator
 102 , const wxString&                   rsName
 103 )
 104 {
 105     //
 106     // Base initialization
 107     //
 108     if ( !CreateBase( pParent
 109                      ,vId
 110                      ,rPos
 111                      ,rSize
 112                      ,lStyle
 113                      ,rValidator
 114                      ,rsName
 115                     ))
 116         return false;
 117
 118     wxPoint                         vPos = rPos; // The OS/2 position
 119     SWP                             vSwp;
 120
 121     if (pParent )
 122     {
 123         pParent->AddChild(this);
 124     }
 125
 126     m_windowStyle = lStyle;
 127     m_bIsMLE = false;
 128
 129     long                            lSstyle = WS_VISIBLE | WS_TABSTOP;
 130
 131     //
 132     // Single and multiline edit fields are two different controls in PM
 133     //
 134     if ( m_windowStyle & wxTE_MULTILINE )
 135     {
 136         lSstyle |= MLS_BORDER | MLS_WORDWRAP;
 137         m_bIsMLE = true;
 138
 139         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 140             lSstyle |= MLS_VSCROLL;
 141         if (m_windowStyle & wxHSCROLL)
 142             lSstyle |= MLS_HSCROLL;
 143         if (m_windowStyle & wxTE_READONLY)
 144             lSstyle |= MLS_READONLY;
 145     }
 146     else
 147     {
 148         lSstyle |= ES_LEFT | ES_AUTOSCROLL | ES_MARGIN;
 149
 150         if (m_windowStyle & wxHSCROLL)
 151             lSstyle |=  ES_AUTOSCROLL;
 152         if (m_windowStyle & wxTE_READONLY)
 153             lSstyle |= ES_READONLY;
 154         if (m_windowStyle & wxTE_PASSWORD) // hidden input
 155             lSstyle |= ES_UNREADABLE;
 156     }
 157
 158     if (m_bIsMLE)
 159     {
 160         m_hWnd = (WXHWND)::WinCreateWindow( (HWND)GetHwndOf(pParent) // Parent window handle
 161                                            ,WC_MLE                   // Window class
 162                                            ,(PSZ)rsValue.c_str()     // Initial Text
 163                                            ,(ULONG)lSstyle           // Style flags
 164                                            ,(LONG)0                  // X pos of origin
 165                                            ,(LONG)0                  // Y pos of origin
 166                                            ,(LONG)0                  // field width
 167                                            ,(LONG)0                  // field height
 168                                            ,(HWND)GetHwndOf(pParent) // owner window handle (same as parent
 169                                            ,HWND_TOP                 // initial z position
 170                                            ,(ULONG)vId               // Window identifier
 171                                            ,NULL                     // no control data
 172                                            ,NULL                     // no Presentation parameters
 173                                           );
 174     }
 175     else
 176     {
 177         m_hWnd = (WXHWND)::WinCreateWindow( (HWND)GetHwndOf(pParent) // Parent window handle
 178                                            ,WC_ENTRYFIELD            // Window class
 179                                            ,(PSZ)rsValue.c_str()     // Initial Text
 180                                            ,(ULONG)lSstyle           // Style flags
 181                                            ,(LONG)0                  // X pos of origin
 182                                            ,(LONG)0                  // Y pos of origin
 183                                            ,(LONG)0                  // field width
 184                                            ,(LONG)0                  // field height
 185                                            ,(HWND)GetHwndOf(pParent) // owner window handle (same as parent
 186                                            ,HWND_TOP                 // initial z position
 187                                            ,(ULONG)vId               // Window identifier
 188                                            ,NULL                     // no control data
 189                                            ,NULL                     // no Presentation parameters
 190                                           );
 191     }
 192
 193     if (m_hWnd == 0)
 194     {
 195         return false;
 196     }
 197
 198     SubclassWin(GetHWND());
 199
 200     //
 201     // Set font, position, size and initial value
 202     //
 203     wxFont*                          pTextFont = new wxFont( 8
 204                                                             ,wxMODERN
 205                                                             ,wxNORMAL
 206                                                             ,wxNORMAL
 207                                                            );
 208     SetFont(*pTextFont);
 209     if (!rsValue.empty())
 210     {
 211         SetValue(rsValue);
 212     }
 213     SetupColours();
 214     //
 215     // If X and/or Y are not zero the difference is the compensation value
 216     // for margins for OS/2 controls.
 217     //
 218     ::WinQueryWindowPos(m_hWnd, &vSwp);
 219     SetXComp(vSwp.x);
 220     SetYComp(vSwp.y);
 221     SetSize( vPos.x - GetXComp()
 222             ,vPos.y - GetYComp()
 223             ,rSize.x
 224             ,rSize.y
 225            );
 226     delete pTextFont;
 227     return true;
 228 } // end of wxTextCtrl::Create
 229
 230 //
 231 // Make sure the window style (etc.) reflects the HWND style (roughly)
 232 //
 233 void wxTextCtrl::AdoptAttributesFromHWND()
 234 {
 235     HWND                            hWnd = GetHwnd();
 236     LONG                            lStyle = ::WinQueryWindowULong(hWnd, QWL_STYLE);
 237
 238     wxWindow::AdoptAttributesFromHWND();
 239
 240     if (m_bIsMLE)
 241     {
 242         m_windowStyle |= wxTE_MULTILINE;
 243         if (lStyle & MLS_READONLY)
 244             m_windowStyle |= wxTE_READONLY;
 245     }
 246     else
 247     {
 248         if (lStyle & ES_UNREADABLE)
 249             m_windowStyle |= wxTE_PASSWORD;
 250         if (lStyle & ES_READONLY)
 251             m_windowStyle |= wxTE_READONLY;
 252     }
 253 } // end of wxTextCtrl::AdoptAttributesFromHWND
 254
 255 WXDWORD wxTextCtrl::OS2GetStyle(
 256   long                              lStyle
 257 , WXDWORD*                          pdwExstyle
 258 ) const
 259 {
 260     //
 261     // Default border for the text controls is the sunken one
 262     //
 263     if ((lStyle & wxBORDER_MASK) == wxBORDER_DEFAULT )
 264     {
 265         lStyle |= wxBORDER_SUNKEN;
 266     }
 267
 268     long                            dwStyle = wxControl::OS2GetStyle( lStyle
 269                                                                      ,pdwExstyle
 270                                                                     );
 271
 272     dwStyle = WS_VISIBLE | WS_TABSTOP;
 273
 274     //
 275     // Single and multiline edit fields are two different controls in PM
 276     //
 277     if ( m_windowStyle & wxTE_MULTILINE )
 278     {
 279         dwStyle |= MLS_BORDER | MLS_WORDWRAP;
 280         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 281             dwStyle |= MLS_VSCROLL;
 282         if (m_windowStyle & wxHSCROLL)
 283             dwStyle |= MLS_HSCROLL;
 284         if (m_windowStyle & wxTE_READONLY)
 285             dwStyle |= MLS_READONLY;
 286     }
 287     else
 288     {
 289         dwStyle |= ES_LEFT | ES_AUTOSCROLL | ES_MARGIN;
 290         if (m_windowStyle & wxHSCROLL)
 291             dwStyle |=  ES_AUTOSCROLL;
 292         if (m_windowStyle & wxTE_READONLY)
 293             dwStyle |= ES_READONLY;
 294         if (m_windowStyle & wxTE_PASSWORD) // hidden input
 295             dwStyle |= ES_UNREADABLE;
 296     }
 297     return dwStyle;
 298 } // end of wxTextCtrl::OS2GetStyle
 299
 300 void wxTextCtrl::SetWindowStyleFlag(
 301   long                              lStyle
 302 )
 303 {
 304     wxControl::SetWindowStyleFlag(lStyle);
 305 } // end of wxTextCtrl::SetWindowStyleFlag
 306
 307 void wxTextCtrl::SetupColours()
 308 {
 309     wxColour                        vBkgndColour;
 310
 311     vBkgndColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 312     SetBackgroundColour(vBkgndColour);
 313     SetForegroundColour(GetParent()->GetForegroundColour());
 314     if (m_bIsMLE)
 315     {
 316         ::WinSendMsg( GetHwnd()
 317                      ,MLM_SETTEXTCOLOR
 318                      ,(MPARAM)GetParent()->GetForegroundColour().GetPixel()
 319                      ,(MPARAM)MLE_RGB
 320                     );
 321     }
 322 } // end of wxTextCtrl::SetupColours
 323
 324 // ----------------------------------------------------------------------------
 325 // set/get the controls text
 326 // ----------------------------------------------------------------------------
 327
 328 wxString wxTextCtrl::GetValue() const
 329 {
 330     wxString                        sStr = wxGetWindowText(GetHWND());
 331     char*                           zStr = (char*)sStr.c_str();
 332
 333     for ( ; *zStr; zStr++ )
 334     {
 335         //
 336         // this will replace \r\n with just \n
 337         //
 338         if (*zStr == '\n')
 339             *zStr = '\0';
 340         if (*zStr == '\r')
 341             *zStr = '\n';
 342     }
 343     return sStr;
 344 } // end of wxTextCtrl::GetValue
 345
 346 void wxTextCtrl::SetValue(
 347   const wxString&                   rsValue
 348 )
 349 {
 350     //
 351     // If the text is long enough, it's faster to just set it instead of first
 352     // comparing it with the old one (chances are that it will be different
 353     // anyhow, this comparison is there to avoid flicker for small single-line
 354     // edit controls mostly)
 355     //
 356     if ((rsValue.length() > 0x400) || (rsValue != GetValue()))
 357     {
 358         ::WinSetWindowText(GetHwnd(), (PSZ)rsValue.c_str());
 359         AdjustSpaceLimit();
 360     }
 361 } // end of wxTextCtrl::SetValue
 362
 363 void wxTextCtrl::WriteText(
 364   const wxString&                   rsValue
 365 )
 366 {
 367     if (m_bIsMLE)
 368         ::WinSendMsg(GetHwnd(), MLM_INSERT, MPARAM((PCHAR)rsValue.c_str()), MPARAM(0));
 369     else
 370         ::WinSetWindowText(GetHwnd(), (PSZ)rsValue.c_str());
 371     AdjustSpaceLimit();
 372 } // end of wxTextCtrl::WriteText
 373
 374 void wxTextCtrl::AppendText(
 375   const wxString&                   rsText
 376 )
 377 {
 378     SetInsertionPointEnd();
 379     WriteText(rsText);
 380 } // end of wxTextCtrl::AppendText
 381
 382 void wxTextCtrl::Clear()
 383 {
 384     ::WinSetWindowText(GetHwnd(), "");
 385 } // end of wxTextCtrl::Clear
 386
 387 bool wxTextCtrl::EmulateKeyPress(
 388   const wxKeyEvent&                 rEvent
 389 )
 390 {
 391     SetFocus();
 392     return(wxTextCtrlBase::EmulateKeyPress(rEvent));
 393 } // end of wxTextCtrl::EmulateKeyPress
 394
 395 // ----------------------------------------------------------------------------
 396 // Clipboard operations
 397 // ----------------------------------------------------------------------------
 398
 399 void wxTextCtrl::Copy()
 400 {
 401     if (CanCopy())
 402     {
 403         HWND hWnd = GetHwnd();
 404         if (m_bIsMLE)
 405             ::WinSendMsg(hWnd, MLM_COPY, 0, 0);
 406         else
 407             ::WinSendMsg(hWnd, EM_COPY, 0, 0);
 408     }
 409 } // end of wxTextCtrl::Copy
 410
 411 void wxTextCtrl::Cut()
 412 {
 413     if (CanCut())
 414     {
 415         HWND hWnd = GetHwnd();
 416
 417         if (m_bIsMLE)
 418             ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 419         else
 420             ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 421     }
 422 } // end of wxTextCtrl::Cut
 423
 424 void wxTextCtrl::Paste()
 425 {
 426     if (CanPaste())
 427     {
 428         HWND                        hWnd = GetHwnd();
 429
 430         ::WinSendMsg(hWnd, EM_PASTE, 0, 0);
 431     }
 432 } // end of wxTextCtrl::Paste
 433
 434 bool wxTextCtrl::CanCopy() const
 435 {
 436     //
 437     // Can copy if there's a selection
 438     //
 439     long                            lFrom = 0L;
 440     long                            lTo = 0L;
 441
 442     GetSelection(&lFrom, &lTo);
 443     return (lFrom != lTo);
 444 } // end of wxTextCtrl::CanCopy
 445
 446 bool wxTextCtrl::CanCut() const
 447 {
 448     //
 449     // Can cut if there's a selection
 450     //
 451     long                            lFrom = 0L;
 452     long                            lTo = 0L;
 453
 454     GetSelection(&lFrom, &lTo);
 455     return (lFrom != lTo);
 456 } // end of wxTextCtrl::CanCut
 457
 458 bool wxTextCtrl::CanPaste() const
 459 {
 460     bool                            bIsTextAvailable = false;
 461
 462     if (!IsEditable())
 463         return false;
 464
 465     //
 466     // Check for straight text on clipboard
 467     //
 468     if (::WinOpenClipbrd(vHabmain))
 469     {
 470         bIsTextAvailable = (::WinQueryClipbrdData(vHabmain, CF_TEXT) != 0);
 471         ::WinCloseClipbrd(vHabmain);
 472     }
 473     return bIsTextAvailable;
 474 } // end of wxTextCtrl::CanPaste
 475
 476 // ----------------------------------------------------------------------------
 477 // Accessors
 478 // ----------------------------------------------------------------------------
 479
 480 void wxTextCtrl::SetEditable(
 481   bool                              bEditable
 482 )
 483 {
 484     HWND                            hWnd = GetHwnd();
 485
 486     if (m_bIsMLE)
 487         ::WinSendMsg(hWnd, MLM_SETREADONLY, MPFROMLONG(!bEditable), (MPARAM)0);
 488     else
 489         ::WinSendMsg(hWnd, EM_SETREADONLY, MPFROMLONG(!bEditable), (MPARAM)0);
 490 } // end of wxTextCtrl::SetEditable
 491
 492 void wxTextCtrl::SetInsertionPoint(
 493   long                              lPos
 494 )
 495 {
 496     HWND                            hWnd = GetHwnd();
 497
 498     if (m_bIsMLE)
 499         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lPos, (MPARAM)lPos);
 500     else
 501         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lPos, (USHORT)lPos), (MPARAM)0);
 502 } // end of wxTextCtrl::SetInsertionPoint
 503
 504 void wxTextCtrl::SetInsertionPointEnd()
 505 {
 506     wxTextPos                       lPos = GetLastPosition();
 507
 508     //
 509     // We must not do anything if the caret is already there because calling
 510     // SetInsertionPoint() thaws the controls if Freeze() had been called even
 511     // if it doesn't actually move the caret anywhere and so the simple fact of
 512     // doing it results in horrible flicker when appending big amounts of text
 513     // to the control in a few chunks (see DoAddText() test in the text sample)
 514     //
 515     if (GetInsertionPoint() == GetLastPosition())
 516         return;
 517     SetInsertionPoint(lPos);
 518 } // end of wxTextCtrl::SetInsertionPointEnd
 519
 520 long wxTextCtrl::GetInsertionPoint() const
 521 {
 522     WXDWORD                         dwPos = 0L;
 523
 524     if (m_bIsMLE)
 525         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), MLM_QUERYSEL, (MPARAM)MLFQS_MINSEL, 0);
 526     else
 527     {
 528         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), EM_QUERYSEL, 0, 0);
 529         dwPos = SHORT1FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 530     }
 531     return (dwPos & 0xFFFF);
 532 } // end of wxTextCtrl::GetInsertionPoint
 533
 534 wxTextPos wxTextCtrl::GetLastPosition() const
 535 {
 536     HWND                            hWnd = GetHwnd();
 537     long                            lCharIndex;
 538     long                            lLineLength;
 539
 540     if (m_bIsMLE)
 541     {
 542         lCharIndex = 0;
 543
 544         //
 545         // This just gets the total text length.  The last will be this value
 546         //
 547         lLineLength = (long)::WinSendMsg(hWnd, MLM_QUERYTEXTLENGTH, 0, 0);
 548     }
 549     else
 550     {
 551         WNDPARAMS                   vParams;
 552
 553         lCharIndex = 0;
 554         vParams.fsStatus = WPM_CCHTEXT;
 555         if (::WinSendMsg( GetHwnd()
 556                          ,WM_QUERYWINDOWPARAMS
 557                          ,&vParams
 558                          ,0
 559                         ))
 560         {
 561             lLineLength = (long)vParams.cchText;
 562         }
 563         else
 564             lLineLength = 0;
 565     }
 566     return(lCharIndex + lLineLength);
 567 } // end of wxTextCtrl::GetLastPosition
 568
 569 // If the return values from and to are the same, there is no
 570 // selection.
 571 void wxTextCtrl::GetSelection(
 572   long*                             plFrom
 573 , long*                             plTo
 574 ) const
 575 {
 576     WXDWORD                         dwPos;
 577
 578     if (m_bIsMLE)
 579         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), MLM_QUERYSEL, (MPARAM)MLFQS_MINSEL, 0);
 580     else
 581     {
 582         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), EM_QUERYSEL, 0, 0);
 583     }
 584     *plFrom = SHORT1FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 585     *plTo = SHORT2FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 586 } // end of wxTextCtrl::GetSelection
 587
 588 bool wxTextCtrl::IsEditable() const
 589 {
 590     if (m_bIsMLE)
 591         return((bool)LONGFROMMR(::WinSendMsg(GetHwnd(), MLM_QUERYREADONLY, 0, 0)));
 592     else
 593         return((bool)LONGFROMMR(::WinSendMsg(GetHwnd(), EM_QUERYREADONLY, 0, 0)));
 594 } // end of wxTextCtrl::IsEditable
 595
 596 // ----------------------------------------------------------------------------
 597 // Editing
 598 // ----------------------------------------------------------------------------
 599
 600 void wxTextCtrl::Replace( long lFrom,
 601                           long lTo,
 602                           const wxString& rsValue )
 603 {
 604 #if wxUSE_CLIPBOARD
 605     HWND hWnd = GetHwnd();
 606
 607     //
 608     // Set selection and remove it
 609     //
 610     if (m_bIsMLE)
 611     {
 612         ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 613         ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 614     }
 615     else
 616     {
 617         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 618         ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 619     }
 620
 621     //
 622     // Now replace with 'value', by pasting.
 623     //
 624     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)rsValue, 0, 0);
 625
 626     // Paste into edit control
 627     if (m_bIsMLE)
 628         ::WinSendMsg(hWnd, MLM_PASTE, (MPARAM)0, (MPARAM)0);
 629     else
 630         ::WinSendMsg(hWnd, EM_PASTE, (MPARAM)0, (MPARAM)0);
 631 #else
 632     wxUnusedVar(lFrom);
 633     wxUnusedVar(lTo);
 634     wxUnusedVar(rsValue);
 635     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 636 #endif
 637 }  // end of wxTextCtrl::Replace
 638
 639 void wxTextCtrl::Remove(
 640   long                              lFrom
 641 , long                              lTo
 642 )
 643 {
 644     HWND                            hWnd      = GetHwnd();
 645
 646     if (m_bIsMLE)
 647     {
 648         ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 649         ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 650     }
 651     else
 652     {
 653         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 654         ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 655     }
 656 } // end of wxTextCtrl::Remove
 657
 658 void wxTextCtrl::SetSelection(
 659   long                              lFrom
 660 , long                              lTo
 661 )
 662 {
 663     HWND                            hWnd = GetHwnd();
 664     long                            lFromChar = lFrom;
 665     long                            lToChar = lTo;
 666
 667     //
 668     // If from and to are both -1, it means (in wxWidgets) that all text should
 669     // be selected. Translate into Windows convention
 670     //
 671     if ((lFrom == -1L) && (lTo == -1L))
 672     {
 673         lFromChar = 0L;
 674         lToChar   = -1L;
 675     }
 676     if (m_bIsMLE)
 677         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lFromChar, (MPARAM)lToChar);
 678     else
 679         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFromChar, (USHORT)lToChar), (MPARAM)0);
 680 } // end of wxTextCtrl::SetSelection
 681
 682 bool wxTextCtrl::LoadFile(
 683   const wxString&                   rsFile
 684 )
 685 {
 686     if ( wxTextCtrlBase::LoadFile(rsFile) )
 687     {
 688         //
 689         // Update the size limit if needed
 690         //
 691         AdjustSpaceLimit();
 692         return true;
 693     }
 694     return false;
 695 } // end of wxTextCtrl::LoadFile
 696
 697 bool wxTextCtrl::IsModified() const
 698 {
 699     bool                            bRc;
 700
 701     if (m_bIsMLE)
 702         bRc = (bool)LONGFROMMR(::WinSendMsg(GetHwnd(), MLM_QUERYCHANGED, 0, 0));
 703     else
 704         bRc = (bool)LONGFROMMR(::WinSendMsg(GetHwnd(), EM_QUERYCHANGED, 0, 0));
 705     return bRc;
 706 } // end of wxTextCtrl::IsModified
 707
 708 void wxTextCtrl::MarkDirty()
 709 {
 710     if (m_bIsMLE)
 711         ::WinSendMsg(GetHwnd(), MLM_SETCHANGED, MPFROMLONG(TRUE), 0);
 712     else
 713         // EM controls do not have a SETCHANGED, what can we do??
 714         wxFAIL_MSG( _T("not implemented") );
 715 }
 716
 717 //
 718 // Makes 'unmodified'
 719 //
 720 void wxTextCtrl::DiscardEdits()
 721 {
 722     if (m_bIsMLE)
 723         ::WinSendMsg(GetHwnd(), MLM_SETCHANGED, MPFROMLONG(FALSE), 0);
 724     else
 725         //
 726         // EM controls do not have a SETCHANGED but issuing a query should reset it
 727         //
 728         ::WinSendMsg(GetHwnd(), EM_QUERYCHANGED, 0, 0);
 729 } // end of wxTextCtrl::DiscardEdits
 730
 731 int wxTextCtrl::GetNumberOfLines() const
 732 {
 733     int                             nNumLines;
 734
 735     if (m_bIsMLE)
 736         nNumLines = (int)::WinSendMsg(GetHwnd(), MLM_QUERYLINECOUNT, 0, 0);
 737     else
 738         nNumLines = 1;
 739     return nNumLines;
 740 } // end of wxTextCtrl::GetNumberOfLines
 741
 742 long wxTextCtrl::XYToPosition(
 743   long                              lX
 744 , long                              lY
 745 ) const
 746 {
 747     long                            lCharIndex = 0L;
 748     long                            lLen;
 749
 750     if (m_bIsMLE)
 751     {
 752         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 753         lCharIndex = ((lLen * lY) + lX);
 754     }
 755     else
 756         lCharIndex = lX;
 757     return lCharIndex;
 758 } // end of wxTextCtrl::XYToPosition
 759
 760 bool wxTextCtrl::PositionToXY(
 761   long                              lPos
 762 , long*                             plX
 763 , long*                             plY
 764 ) const
 765 {
 766     HWND                            hWnd = GetHwnd();
 767     long                            nLineNo = -1;
 768     long                            lCharIndex = 0;
 769
 770     if (m_bIsMLE)
 771         nLineNo = (long)::WinSendMsg(hWnd, MLM_LINEFROMCHAR, (MPARAM)lPos, 0);
 772     else
 773         nLineNo = 0;
 774
 775     if (nLineNo == -1)
 776     {
 777         // no such line
 778         return false;
 779     }
 780
 781     //
 782     // This gets the char index for the _beginning_ of this line
 783     //
 784     long                            lLineWidth;
 785
 786     if (m_bIsMLE)
 787     {
 788         lLineWidth = (long)::WinSendMsg(hWnd, MLM_QUERYLINELENGTH, (MPARAM)0, (MPARAM)0);
 789         lCharIndex = (nLineNo + 1) * lLineWidth;
 790     }
 791     else
 792     {
 793         WNDPARAMS                   vParams;
 794
 795         vParams.fsStatus = WPM_CCHTEXT;
 796         if (::WinSendMsg( hWnd
 797                          ,WM_QUERYWINDOWPARAMS
 798                          ,&vParams
 799                          ,0
 800                         ))
 801         {
 802             lCharIndex = vParams.cchText;
 803         }
 804         else
 805             lCharIndex = 32;
 806     }
 807
 808     if (lCharIndex == -1)
 809     {
 810         return false;
 811     }
 812
 813     //
 814     // The X position must therefore be the difference between pos and charIndex
 815     //
 816     if (plX)
 817         *plX = lPos - lCharIndex;
 818     if (plY)
 819         *plY = nLineNo;
 820
 821     return true;
 822 } // end of wxTextCtrl::PositionToXY
 823
 824 void wxTextCtrl::ShowPosition( long WXUNUSED(lPos) )
 825 {
 826     HWND hWnd = GetHwnd();
 827     long lCurrentLineLineNo = 0L;
 828
 829     // To scroll to a position, we pass the number of lines and characters
 830     // to scroll *by*. This means that we need to:
 831     // (1) Find the line position of the current line.
 832     // (2) Find the line position of pos.
 833     // (3) Scroll by (pos - current).
 834     // For now, ignore the horizontal scrolling.
 835
 836     //
 837     // Is this where scrolling is relative to - the line containing the caret?
 838     // Or is the first visible line??? Try first visible line.
 839     //
 840     if (m_bIsMLE)
 841     {
 842         //
 843         // In PM this is the actual char position
 844         //
 845         lCurrentLineLineNo = (long)::WinSendMsg(hWnd, MLM_QUERYFIRSTCHAR, (MPARAM)0, (MPARAM)0);
 846
 847         //
 848         // This will cause a scroll to the selected position
 849         //
 850         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lCurrentLineLineNo, (MPARAM)lCurrentLineLineNo);
 851     }
 852 } // end of wxTextCtrl::ShowPosition
 853
 854 int wxTextCtrl::GetLineLength( long WXUNUSED(lLineNo) ) const
 855 {
 856     long lLen = 0L;
 857
 858     if (m_bIsMLE)
 859     {
 860         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 861     }
 862     else
 863     {
 864         WNDPARAMS vParams;
 865
 866         vParams.fsStatus = WPM_CCHTEXT;
 867         if (::WinSendMsg( GetHwnd()
 868                          ,WM_QUERYWINDOWPARAMS
 869                          ,&vParams
 870                          ,0
 871                         ))
 872         {
 873             lLen = vParams.cchText;
 874         }
 875         else
 876             lLen = 32;
 877     }
 878     return lLen;
 879 } // end ofwxTextCtrl::GetLineLength
 880
 881 wxString wxTextCtrl::GetLineText(
 882   long                              lLineNo
 883 ) const
 884 {
 885     long                            lLen = (long)GetLineLength((long)lLineNo) + 1;
 886     wxString                        sStr;
 887     wxChar*                         zBuf;
 888
 889     //
 890     // There must be at least enough place for the length WORD in the
 891     // buffer
 892     //
 893     lLen += sizeof(WORD);
 894     zBuf = new wxChar[lLen];
 895     if (m_bIsMLE)
 896     {
 897         long                        lIndex;
 898         long                        lBuflen;
 899         long                        lCopied;
 900
 901         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 902         lIndex = lLen * lLineNo;
 903
 904         ::WinSendMsg(GetHwnd(), MLM_SETSEL, (MPARAM)lIndex, (MPARAM)lIndex);
 905         ::WinSendMsg(GetHwnd(), MLM_SETIMPORTEXPORT, MPFROMP(zBuf), MPFROMSHORT((USHORT)WXSIZEOF(zBuf)));
 906         lBuflen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYFORMATTEXTLENGTH, MPFROMLONG(lIndex), MPFROMLONG(-1));
 907         lCopied = (long)::WinSendMsg(GetHwnd(), MLM_EXPORT, MPFROMP(&lIndex), MPFROMP(&lBuflen));
 908         zBuf[lCopied] = '\0';
 909     }
 910     else
 911     {
 912         WNDPARAMS                   vParams;
 913
 914         vParams.fsStatus = WPM_CCHTEXT;
 915         if (::WinSendMsg( GetHwnd()
 916                          ,WM_QUERYWINDOWPARAMS
 917                          ,&vParams
 918                          ,0
 919                         ))
 920          memcpy((char*)zBuf, vParams.pszText, vParams.cchText);
 921          zBuf[vParams.cchText] = '\0';
 922      }
 923      sStr = zBuf;
 924      delete [] zBuf;
 925      return sStr;
 926 } // end of wxTextCtrl::GetLineText
 927
 928 // ----------------------------------------------------------------------------
 929 // Undo/redo
 930 // ----------------------------------------------------------------------------
 931
 932 void wxTextCtrl::Undo()
 933 {
 934     if (CanUndo())
 935     {
 936         if (m_bIsMLE)
 937             ::WinSendMsg(GetHwnd(), MLM_UNDO, 0, 0);
 938         // Simple entryfields cannot be undone
 939     }
 940 } // end of wxTextCtrl::Undo
 941
 942 void wxTextCtrl::Redo()
 943 {
 944     if (CanRedo())
 945     {
 946         if (m_bIsMLE)
 947             ::WinSendMsg(GetHwnd(), MLM_UNDO, 0, 0);
 948         // Simple entryfields cannot be undone
 949     }
 950 } // end of wxTextCtrl::Redo
 951
 952 bool wxTextCtrl::CanUndo() const
 953 {
 954     bool                            bOk;
 955
 956     if (m_bIsMLE)
 957         bOk = (::WinSendMsg(GetHwnd(), MLM_QUERYUNDO, 0, 0) != 0);
 958     else
 959         bOk = false; // can't undo regular edit fields in PM
 960     return bOk;
 961 } // end of wxTextCtrl::CanUndo
 962
 963 bool wxTextCtrl::CanRedo() const
 964 {
 965     bool                            bOk;
 966
 967     if (m_bIsMLE)
 968         bOk = (::WinSendMsg(GetHwnd(), MLM_QUERYUNDO, 0, 0) != 0);
 969     else
 970         bOk = false; // can't undo regular edit fields in PM
 971     return bOk;
 972 } // end of wxTextCtrl::CanRedo
 973
 974 // ----------------------------------------------------------------------------
 975 // implemenation details
 976 // ----------------------------------------------------------------------------
 977
 978 void wxTextCtrl::Command(
 979   wxCommandEvent&                   rEvent
 980 )
 981 {
 982     SetValue(rEvent.GetString());
 983     ProcessCommand (rEvent);
 984 } // end of wxTextCtrl::Command
 985
 986 void wxTextCtrl::OnDropFiles(
 987   wxDropFilesEvent&                 rEvent
 988 )
 989 {
 990     // By default, load the first file into the text window.
 991     if (rEvent.GetNumberOfFiles() > 0)
 992     {
 993         LoadFile(rEvent.GetFiles()[0]);
 994     }
 995 } // end of wxTextCtrl::OnDropFiles
 996
 997 WXHBRUSH wxTextCtrl::OnCtlColor( WXHDC    hWxDC,
 998                                  WXHWND   WXUNUSED(hWnd),
 999                                  WXUINT   WXUNUSED(uCtlColor),
1000                                  WXUINT   WXUNUSED(uMessage),
1001                                  WXWPARAM WXUNUSED(wParam),
1002                                  WXLPARAM WXUNUSED(lParam) )
1003 {
1004     HPS      hPS = (HPS)hWxDC;
1005     wxColour vColBack = GetBackgroundColour();
1006     wxColour vColFore = GetForegroundColour();
1007     wxBrush* pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( vColBack, wxSOLID );
1008
1009     if (m_bUseCtl3D)
1010     {
1011         HBRUSH                      hBrush = NULLHANDLE;
1012
1013         return hBrush;
1014     }
1015     if (GetParent()->GetTransparentBackground())
1016         ::GpiSetBackMix(hPS, BM_LEAVEALONE);
1017     else
1018         ::GpiSetBackMix(hPS, BM_OVERPAINT);
1019     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1020         vColBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1021     ::GpiSetBackColor(hPS, vColBack.GetPixel());
1022     ::GpiSetColor(hPS, vColFore.GetPixel());
1023     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
1024 } // end of wxTextCtrl::OnCtlColor
1025
1026 bool wxTextCtrl::OS2ShouldPreProcessMessage(
1027   WXMSG*                            pMsg
1028 )
1029 {
1030     return wxControl::OS2ShouldPreProcessMessage(pMsg);
1031 } // end of wxTextCtrl::OS2ShouldPreProcessMessage
1032
1033 void wxTextCtrl::OnChar(
1034   wxKeyEvent&                       rEvent
1035 )
1036 {
1037     switch (rEvent.GetKeyCode())
1038     {
1039         case WXK_RETURN:
1040             if ( !(m_windowStyle & wxTE_MULTILINE) )
1041             {
1042                 wxCommandEvent      vEvent(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1043
1044                 vEvent.SetEventObject(this);
1045                 if ( GetEventHandler()->ProcessEvent(vEvent))
1046                     return;
1047             }
1048             //else: multiline controls need Enter for themselves
1049
1050             break;
1051
1052         case WXK_TAB:
1053             // always produce navigation event - even if we process TAB
1054             // ourselves the fact that we got here means that the user code
1055             // decided to skip processing of this TAB - probably to let it
1056             // do its default job.
1057             //
1058             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1059             //     handled by Windows
1060             {
1061                 wxNavigationKeyEvent    vEventNav;
1062
1063                 vEventNav.SetDirection(!rEvent.ShiftDown());
1064                 vEventNav.SetWindowChange(false);
1065                 vEventNav.SetEventObject(this);
1066
1067                 if ( GetEventHandler()->ProcessEvent(vEventNav) )
1068                     return;
1069             }
1070             break;
1071     }
1072     rEvent.Skip();
1073 } // end of wxTextCtrl::OnChar
1074
1075 bool wxTextCtrl::OS2Command(
1076   WXUINT                            uParam
1077 , WXWORD                            WXUNUSED(vId)
1078 )
1079 {
1080     switch (uParam)
1081     {
1082         case EN_SETFOCUS:
1083         case EN_KILLFOCUS:
1084             {
1085                 wxFocusEvent        vEvent( uParam == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1086                                                                    : wxEVT_SET_FOCUS
1087                                            ,m_windowId
1088                                           );
1089
1090                 vEvent.SetEventObject(this);
1091                 GetEventHandler()->ProcessEvent(vEvent);
1092             }
1093             break;
1094
1095         case EN_CHANGE:
1096             {
1097                 wxCommandEvent      vEvent( wxEVT_COMMAND_TEXT_UPDATED
1098                                            ,m_windowId
1099                                           );
1100
1101                 InitCommandEvent(vEvent);
1102                 ProcessCommand(vEvent);
1103             }
1104             break;
1105
1106         case EN_OVERFLOW:
1107             //
1108             // The text size limit has been hit - increase it
1109             //
1110             AdjustSpaceLimit();
1111             break;
1112
1113         case EN_SCROLL:
1114         case EN_INSERTMODETOGGLE:
1115         case EN_MEMERROR:
1116             return false;
1117         default:
1118             return false;
1119     }
1120
1121     //
1122     // Processed
1123     //
1124     return true;
1125 } // end of wxTextCtrl::OS2Command
1126
1127 void wxTextCtrl::AdjustSpaceLimit()
1128 {
1129     unsigned int                    uLen = 0;
1130     unsigned int                    uLimit = 0;
1131
1132     uLen   = ::WinQueryWindowTextLength(GetHwnd());
1133     if (m_bIsMLE)
1134     {
1135         uLimit = (unsigned int)::WinSendMsg( GetHwnd()
1136                                             ,MLM_QUERYTEXTLIMIT
1137                                             ,0
1138                                             ,0
1139                                            );
1140     }
1141     else
1142     {
1143         ENTRYFDATA                  Efd;
1144         WNDPARAMS                   vParams;
1145
1146         vParams.fsStatus = WPM_CBCTLDATA;
1147         vParams.pCtlData = &Efd;
1148         vParams.cbCtlData = sizeof(ENTRYFDATA);
1149
1150         if (::WinSendMsg( GetHwnd()
1151                          ,WM_QUERYWINDOWPARAMS
1152                          ,&vParams
1153                          ,0
1154                         ))
1155             uLimit = (unsigned int)Efd.cchEditLimit;
1156         else
1157             uLimit = 32; //PM's default
1158     }
1159     if (uLen >= uLimit)
1160     {
1161         uLimit = uLen + 0x8000;    // 32Kb
1162         if (uLimit > 0xffff)
1163         {
1164             uLimit = 0L;
1165         }
1166         if (m_bIsMLE)
1167             ::WinSendMsg(GetHwnd(), MLM_SETTEXTLIMIT, MPFROMLONG(uLimit), 0);
1168         else
1169             ::WinSendMsg(GetHwnd(), EM_SETTEXTLIMIT, MPFROMSHORT(uLimit), 0);
1170     }
1171 } // end of wxTextCtrl::AdjustSpaceLimit
1172
1173 bool wxTextCtrl::AcceptsFocus() const
1174 {
1175     //
1176     // We don't want focus if we can't be edited unless we're a multiline
1177     // control because then it might be still nice to get focus from keyboard
1178     // to be able to scroll it without mouse
1179     //
1180     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1181 } // end of wxTextCtrl::Command
1182
1183 wxSize wxTextCtrl::DoGetBestSize() const
1184 {
1185     int                             nCx;
1186     int                             nCy;
1187     wxFont                          vFont = (wxFont)GetFont();
1188
1189     wxGetCharSize(GetHWND(), &nCx, &nCy, &vFont);
1190
1191     int                             wText = DEFAULT_ITEM_WIDTH;
1192     int                             hText = (int)(EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * .8);
1193
1194     if (m_windowStyle & wxTE_MULTILINE)
1195     {
1196         hText *= wxMax(GetNumberOfLines(), 5);
1197     }
1198     //else: for single line control everything is ok
1199     return wxSize(wText, hText);
1200 } // end of wxTextCtrl::DoGetBestSize
1201
1202 // ----------------------------------------------------------------------------
1203 // standard handlers for standard edit menu events
1204 // ----------------------------------------------------------------------------
1205
1206 void wxTextCtrl::OnCut( wxCommandEvent& WXUNUSED(rEvent) )
1207 {
1208     Cut();
1209 } // end of wxTextCtrl::OnCut
1210
1211 void wxTextCtrl::OnCopy( wxCommandEvent& WXUNUSED(rEvent) )
1212 {
1213     Copy();
1214 } // end of wxTextCtrl::OnCopy
1215
1216 void wxTextCtrl::OnPaste( wxCommandEvent& WXUNUSED(rEvent) )
1217 {
1218     Paste();
1219 } // end of wxTextCtrl::OnPaste
1220
1221 void wxTextCtrl::OnUndo( wxCommandEvent& WXUNUSED(rEvent) )
1222 {
1223     Undo();
1224 } // end of wxTextCtrl::OnUndo
1225
1226 void wxTextCtrl::OnRedo( wxCommandEvent& WXUNUSED(rEvent) )
1227 {
1228     Redo();
1229 } // end of wxTextCtrl::OnRedo
1230
1231 void wxTextCtrl::OnDelete( wxCommandEvent& WXUNUSED(rEvent) )
1232 {
1233     long lFrom, lTo;
1234
1235     GetSelection( &lFrom, &lTo );
1236
1237     if (lFrom != -1 && lTo != -1)
1238         Remove( lFrom, lTo );
1239 } // end of wxTextCtrl::OnDelete
1240
1241 void wxTextCtrl::OnSelectAll( wxCommandEvent& WXUNUSED(rEvent) )
1242 {
1243     SetSelection(-1, -1);
1244 } // end of wxTextCtrl::OnSelectAll
1245
1246 void wxTextCtrl::OnUpdateCut( wxUpdateUIEvent& rEvent )
1247 {
1248     rEvent.Enable(CanCut());
1249 } // end of wxTextCtrl::OnUpdateCut
1250
1251 void wxTextCtrl::OnUpdateCopy( wxUpdateUIEvent& rEvent )
1252 {
1253     rEvent.Enable(CanCopy());
1254 } // end of wxTextCtrl::OnUpdateCopy
1255
1256 void wxTextCtrl::OnUpdatePaste( wxUpdateUIEvent& rEvent )
1257 {
1258     rEvent.Enable(CanPaste());
1259 } // end of wxTextCtrl::OnUpdatePaste
1260
1261 void wxTextCtrl::OnUpdateUndo( wxUpdateUIEvent& rEvent )
1262 {
1263     rEvent.Enable(CanUndo());
1264 } // end of wxTextCtrl::OnUpdateUndo
1265
1266 void wxTextCtrl::OnUpdateRedo( wxUpdateUIEvent& rEvent )
1267 {
1268     rEvent.Enable(CanRedo());
1269 } // end of wxTextCtrl::OnUpdateRedo
1270
1271 void wxTextCtrl::OnUpdateDelete( wxUpdateUIEvent& rEvent )
1272 {
1273     long lFrom, lTo;
1274
1275     GetSelection( &lFrom, &lTo );
1276     rEvent.Enable( lFrom != -1L && lTo != -1L && lFrom != lTo && IsEditable()) ;
1277 } // end of wxTextCtrl::OnUpdateDelete
1278
1279 void wxTextCtrl::OnUpdateSelectAll( wxUpdateUIEvent& rEvent )
1280 {
1281     rEvent.Enable(GetLastPosition() > 0);
1282 } // end of wxTextCtrl::OnUpdateSelectAll
1283
1284 bool wxTextCtrl::SetBackgroundColour( const wxColour& rColour )
1285 {
1286     if (m_bIsMLE)
1287         ::WinSendMsg(GetHwnd(), MLM_SETBACKCOLOR, (MPARAM)rColour.GetPixel(), MLE_INDEX);
1288     return true;
1289 } // end of wxTextCtrl::SetBackgroundColour
1290
1291 bool wxTextCtrl::SetForegroundColour( const wxColour& rColour )
1292 {
1293     if (m_bIsMLE)
1294         ::WinSendMsg(GetHwnd(), MLM_SETTEXTCOLOR, (MPARAM)rColour.GetPixel(), MLE_INDEX);
1295     return true;
1296 } // end of wxTextCtrl::SetForegroundColour
1297
1298 bool wxTextCtrl::SetStyle( long lStart,
1299                            long lEnd,
1300                            const wxTextAttr& WXUNUSED(rStyle) )
1301 {
1302     HWND hWnd = GetHwnd();
1303
1304     if (lStart > lEnd)
1305     {
1306         long lTmp = lStart;
1307
1308         lStart = lEnd;
1309         lEnd   = lTmp;
1310     }
1311
1312     //
1313     // We can only change the format of the selection, so select the range we
1314     // want and restore the old selection later
1315     //
1316     long lStartOld, lEndOld;
1317
1318     GetSelection( &lStartOld, &lEndOld );
1319
1320     //
1321     // But do we really have to change the selection?
1322     //
1323     bool bChangeSel = lStart != lStartOld ||
1324                       lEnd != lEndOld;
1325
1326     if (bChangeSel)
1327     {
1328         if (m_bIsMLE)
1329             ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lStart, (USHORT)lEnd), 0);
1330         else
1331             ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lStart, (USHORT)lEnd), 0);
1332     }
1333
1334     //
1335     // TODO:: finish this part
1336     //
1337     return true;
1338 } // end of wxTextCtrl::SetStyle