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 #if wxUSE_CLIPBOARD
  29     #include "wx/app.h"
  30     #include "wx/clipbrd.h"
  31 #endif
  32
  33 #include "wx/textfile.h"
  34
  35 #include "wx/os2/private.h"
  36
  37 #include <string.h>
  38 #include <stdlib.h>
  39 #include <sys/types.h>
  40
  41 #if wxUSE_IOSTREAMH
  42 #   include <fstream.h>
  43 #else
  44 #   include <fstream>
  45 #endif
  46
  47 #if !defined(MLE_INDEX)
  48 #define MLE_INDEX  0
  49 #define MLE_RGB    1
  50 #endif
  51
  52
  53 // ----------------------------------------------------------------------------
  54 // event tables and other macros
  55 // ----------------------------------------------------------------------------
  56
  57 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  58
  59 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  60     EVT_CHAR(wxTextCtrl::OnChar)
  61     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  62
  63     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  64     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  65     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  66     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  67     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  68
  69     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  70     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  71     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  72     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  73     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  74 END_EVENT_TABLE()
  75
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // creation
  83 // ----------------------------------------------------------------------------
  84
  85 wxTextCtrl::wxTextCtrl()
  86 {
  87 }
  88
  89 wxTextCtrl::~wxTextCtrl()
  90 {
  91 }
  92
  93 bool wxTextCtrl::Create(
  94   wxWindow*                         pParent
  95 , wxWindowID                        vId
  96 , const wxString&                   rsValue
  97 , const wxPoint&                    rPos
  98 , const wxSize&                     rSize
  99 , long                              lStyle
 100 , const wxValidator&                rValidator
 101 , const wxString&                   rsName
 102 )
 103 {
 104     HWND                            hParent;
 105     int                             nTempy;
 106
 107     //
 108     // Base initialization
 109     //
 110     if ( !CreateBase( pParent
 111                      ,vId
 112                      ,rPos
 113                      ,rSize
 114                      ,lStyle
 115                      ,rValidator
 116                      ,rsName
 117                     ))
 118         return FALSE;
 119
 120     wxPoint                         vPos = rPos; // The OS/2 position
 121     SWP                             vSwp;
 122
 123     if (pParent )
 124     {
 125         pParent->AddChild(this);
 126     }
 127
 128     m_windowStyle = lStyle;
 129     m_bIsMLE = FALSE;
 130
 131     long                            lSstyle = WS_VISIBLE | WS_TABSTOP;
 132
 133     //
 134     // Single and multiline edit fields are two different controls in PM
 135     //
 136     if ( m_windowStyle & wxTE_MULTILINE )
 137     {
 138         lSstyle |= MLS_BORDER | MLS_WORDWRAP;
 139         m_bIsMLE = TRUE;
 140
 141         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 142             lSstyle |= MLS_VSCROLL;
 143         if (m_windowStyle & wxHSCROLL)
 144             lSstyle |= MLS_HSCROLL;
 145         if (m_windowStyle & wxTE_READONLY)
 146             lSstyle |= MLS_READONLY;
 147     }
 148     else
 149     {
 150         lSstyle |= ES_LEFT | ES_AUTOSCROLL | ES_MARGIN;
 151
 152         if (m_windowStyle & wxHSCROLL)
 153             lSstyle |=  ES_AUTOSCROLL;
 154         if (m_windowStyle & wxTE_READONLY)
 155             lSstyle |= ES_READONLY;
 156         if (m_windowStyle & wxTE_PASSWORD) // hidden input
 157             lSstyle |= ES_UNREADABLE;
 158     }
 159
 160     if (m_bIsMLE)
 161     {
 162         m_hWnd = (WXHWND)::WinCreateWindow( (HWND)GetHwndOf(pParent) // Parent window handle
 163                                            ,WC_MLE                   // Window class
 164                                            ,(PSZ)rsValue.c_str()     // Initial Text
 165                                            ,(ULONG)lSstyle           // Style flags
 166                                            ,(LONG)0                  // X pos of origin
 167                                            ,(LONG)0                  // Y pos of origin
 168                                            ,(LONG)0                  // field width
 169                                            ,(LONG)0                  // field height
 170                                            ,(HWND)GetHwndOf(pParent) // owner window handle (same as parent
 171                                            ,HWND_TOP                 // initial z position
 172                                            ,(ULONG)vId               // Window identifier
 173                                            ,NULL                     // no control data
 174                                            ,NULL                     // no Presentation parameters
 175                                           );
 176     }
 177     else
 178     {
 179         m_hWnd = (WXHWND)::WinCreateWindow( (HWND)GetHwndOf(pParent) // Parent window handle
 180                                            ,WC_ENTRYFIELD            // Window class
 181                                            ,(PSZ)rsValue.c_str()     // Initial Text
 182                                            ,(ULONG)lSstyle           // Style flags
 183                                            ,(LONG)0                  // X pos of origin
 184                                            ,(LONG)0                  // Y pos of origin
 185                                            ,(LONG)0                  // field width
 186                                            ,(LONG)0                  // field height
 187                                            ,(HWND)GetHwndOf(pParent) // owner window handle (same as parent
 188                                            ,HWND_TOP                 // initial z position
 189                                            ,(ULONG)vId               // Window identifier
 190                                            ,NULL                     // no control data
 191                                            ,NULL                     // no Presentation parameters
 192                                           );
 193     }
 194
 195     if (m_hWnd == 0)
 196     {
 197         return FALSE;
 198     }
 199
 200     SubclassWin(GetHWND());
 201
 202     //
 203     // Set font, position, size and initial value
 204     //
 205     wxFont*                          pTextFont = new wxFont( 8
 206                                                             ,wxMODERN
 207                                                             ,wxNORMAL
 208                                                             ,wxNORMAL
 209                                                            );
 210     SetFont(*pTextFont);
 211     if (!rsValue.IsEmpty())
 212     {
 213         SetValue(rsValue);
 214     }
 215     SetupColours();
 216     //
 217     // If X and/or Y are not zero the difference is the compensation value
 218     // for margins for OS/2 controls.
 219     //
 220     ::WinQueryWindowPos(m_hWnd, &vSwp);
 221     SetXComp(vSwp.x);
 222     SetYComp(vSwp.y);
 223     SetSize( vPos.x - GetXComp()
 224             ,vPos.y - GetYComp()
 225             ,rSize.x
 226             ,rSize.y
 227            );
 228     delete pTextFont;
 229     return TRUE;
 230 } // end of wxTextCtrl::Create
 231
 232 //
 233 // Make sure the window style (etc.) reflects the HWND style (roughly)
 234 //
 235 void wxTextCtrl::AdoptAttributesFromHWND()
 236 {
 237     HWND                            hWnd = GetHwnd();
 238     LONG                            lStyle = ::WinQueryWindowULong(hWnd, QWL_STYLE);
 239
 240     wxWindow::AdoptAttributesFromHWND();
 241
 242     if (m_bIsMLE)
 243     {
 244         m_windowStyle |= wxTE_MULTILINE;
 245         if (lStyle & MLS_READONLY)
 246             m_windowStyle |= wxTE_READONLY;
 247     }
 248     else
 249     {
 250         if (lStyle & ES_UNREADABLE)
 251             m_windowStyle |= wxTE_PASSWORD;
 252         if (lStyle & ES_READONLY)
 253             m_windowStyle |= wxTE_READONLY;
 254     }
 255 } // end of wxTextCtrl::AdoptAttributesFromHWND
 256
 257 WXDWORD wxTextCtrl::OS2GetStyle(
 258   long                              lStyle
 259 , WXDWORD*                          pdwExstyle
 260 ) const
 261 {
 262     //
 263     // Default border for the text controls is the sunken one
 264     //
 265     if ((lStyle & wxBORDER_MASK) == wxBORDER_DEFAULT )
 266     {
 267         lStyle |= wxBORDER_SUNKEN;
 268     }
 269
 270     long                            dwStyle = wxControl::OS2GetStyle( lStyle
 271                                                                      ,pdwExstyle
 272                                                                     );
 273
 274     dwStyle = WS_VISIBLE | WS_TABSTOP;
 275
 276     //
 277     // Single and multiline edit fields are two different controls in PM
 278     //
 279     if ( m_windowStyle & wxTE_MULTILINE )
 280     {
 281         dwStyle |= MLS_BORDER | MLS_WORDWRAP;
 282         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 283             dwStyle |= MLS_VSCROLL;
 284         if (m_windowStyle & wxHSCROLL)
 285             dwStyle |= MLS_HSCROLL;
 286         if (m_windowStyle & wxTE_READONLY)
 287             dwStyle |= MLS_READONLY;
 288     }
 289     else
 290     {
 291         dwStyle |= ES_LEFT | ES_AUTOSCROLL | ES_MARGIN;
 292         if (m_windowStyle & wxHSCROLL)
 293             dwStyle |=  ES_AUTOSCROLL;
 294         if (m_windowStyle & wxTE_READONLY)
 295             dwStyle |= ES_READONLY;
 296         if (m_windowStyle & wxTE_PASSWORD) // hidden input
 297             dwStyle |= ES_UNREADABLE;
 298     }
 299     return dwStyle;
 300 } // end of wxTextCtrl::OS2GetStyle
 301
 302 void wxTextCtrl::SetWindowStyleFlag(
 303   long                              lStyle
 304 )
 305 {
 306     wxControl::SetWindowStyleFlag(lStyle);
 307 } // end of wxTextCtrl::SetWindowStyleFlag
 308
 309 void wxTextCtrl::SetupColours()
 310 {
 311     wxColour                        vBkgndColour;
 312
 313     vBkgndColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 314     SetBackgroundColour(vBkgndColour);
 315     SetForegroundColour(GetParent()->GetForegroundColour());
 316     if (m_bIsMLE)
 317     {
 318         ::WinSendMsg( GetHwnd()
 319                      ,MLM_SETTEXTCOLOR
 320                      ,(MPARAM)GetParent()->GetForegroundColour().GetPixel()
 321                      ,(MPARAM)MLE_RGB
 322                     );
 323     }
 324 } // end of wxTextCtrl::SetupColours
 325
 326 // ----------------------------------------------------------------------------
 327 // set/get the controls text
 328 // ----------------------------------------------------------------------------
 329
 330 wxString wxTextCtrl::GetValue() const
 331 {
 332     wxString                        sStr = wxGetWindowText(GetHWND());
 333     char*                           zStr = (char*)sStr.c_str();
 334
 335     for ( ; *zStr; zStr++ )
 336     {
 337         //
 338         // this will replace \r\n with just \n
 339         //
 340         if (*zStr == '\n')
 341             *zStr = '\0';
 342         if (*zStr == '\r')
 343             *zStr = '\n';
 344     }
 345     return sStr;
 346 } // end of wxTextCtrl::GetValue
 347
 348 void wxTextCtrl::SetValue(
 349   const wxString&                   rsValue
 350 )
 351 {
 352     //
 353     // If the text is long enough, it's faster to just set it instead of first
 354     // comparing it with the old one (chances are that it will be different
 355     // anyhow, this comparison is there to avoid flicker for small single-line
 356     // edit controls mostly)
 357     //
 358     if ((rsValue.length() > 0x400) || (rsValue != GetValue()))
 359     {
 360         ::WinSetWindowText(GetHwnd(), rsValue.c_str());
 361         AdjustSpaceLimit();
 362     }
 363 } // end of wxTextCtrl::SetValue
 364
 365 void wxTextCtrl::WriteText(
 366   const wxString&                   rsValue
 367 )
 368 {
 369     if (m_bIsMLE)
 370         ::WinSendMsg(GetHwnd(), MLM_INSERT, MPARAM((PCHAR)rsValue.c_str()), MPARAM(0));
 371     else
 372         ::WinSetWindowText(GetHwnd(), rsValue.c_str());
 373     AdjustSpaceLimit();
 374 } // end of wxTextCtrl::WriteText
 375
 376 void wxTextCtrl::AppendText(
 377   const wxString&                   rsText
 378 )
 379 {
 380     SetInsertionPointEnd();
 381     WriteText(rsText);
 382 } // end of wxTextCtrl::AppendText
 383
 384 void wxTextCtrl::Clear()
 385 {
 386     ::WinSetWindowText(GetHwnd(), "");
 387 } // end of wxTextCtrl::Clear
 388
 389 bool wxTextCtrl::EmulateKeyPress(
 390   const wxKeyEvent&                 rEvent
 391 )
 392 {
 393     SetFocus();
 394     return(wxTextCtrlBase::EmulateKeyPress(rEvent));
 395 } // end of wxTextCtrl::EmulateKeyPress
 396
 397 // ----------------------------------------------------------------------------
 398 // Clipboard operations
 399 // ----------------------------------------------------------------------------
 400
 401 void wxTextCtrl::Copy()
 402 {
 403     if (CanCopy())
 404     {
 405         HWND hWnd = GetHwnd();
 406         if (m_bIsMLE)
 407             ::WinSendMsg(hWnd, MLM_COPY, 0, 0);
 408         else
 409             ::WinSendMsg(hWnd, EM_COPY, 0, 0);
 410     }
 411 } // end of wxTextCtrl::Copy
 412
 413 void wxTextCtrl::Cut()
 414 {
 415     if (CanCut())
 416     {
 417         HWND hWnd = GetHwnd();
 418
 419         if (m_bIsMLE)
 420             ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 421         else
 422             ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 423     }
 424 } // end of wxTextCtrl::Cut
 425
 426 void wxTextCtrl::Paste()
 427 {
 428     if (CanPaste())
 429     {
 430         HWND                        hWnd = GetHwnd();
 431
 432         ::WinSendMsg(hWnd, EM_PASTE, 0, 0);
 433     }
 434 } // end of wxTextCtrl::Paste
 435
 436 bool wxTextCtrl::CanCopy() const
 437 {
 438     //
 439     // Can copy if there's a selection
 440     //
 441     long                            lFrom = 0L;
 442     long                            lTo = 0L;
 443
 444     GetSelection(&lFrom, &lTo);
 445     return (lFrom != lTo);
 446 } // end of wxTextCtrl::CanCopy
 447
 448 bool wxTextCtrl::CanCut() const
 449 {
 450     //
 451     // Can cut if there's a selection
 452     //
 453     long                            lFrom = 0L;
 454     long                            lTo = 0L;
 455
 456     GetSelection(&lFrom, &lTo);
 457     return (lFrom != lTo);
 458 } // end of wxTextCtrl::CanCut
 459
 460 bool wxTextCtrl::CanPaste() const
 461 {
 462     bool                            bIsTextAvailable = FALSE;
 463
 464     if (!IsEditable())
 465         return FALSE;
 466
 467     //
 468     // Check for straight text on clipboard
 469     //
 470     if (::WinOpenClipbrd(vHabmain))
 471     {
 472         bIsTextAvailable = (::WinQueryClipbrdData(vHabmain, CF_TEXT) != 0);
 473         ::WinCloseClipbrd(vHabmain);
 474     }
 475     return bIsTextAvailable;
 476 } // end of wxTextCtrl::CanPaste
 477
 478 // ----------------------------------------------------------------------------
 479 // Accessors
 480 // ----------------------------------------------------------------------------
 481
 482 void wxTextCtrl::SetEditable(
 483   bool                              bEditable
 484 )
 485 {
 486     HWND                            hWnd = GetHwnd();
 487
 488     if (m_bIsMLE)
 489         ::WinSendMsg(hWnd, MLM_SETREADONLY, MPFROMLONG(!bEditable), (MPARAM)0);
 490     else
 491         ::WinSendMsg(hWnd, EM_SETREADONLY, MPFROMLONG(!bEditable), (MPARAM)0);
 492 } // end of wxTextCtrl::SetEditable
 493
 494 void wxTextCtrl::SetInsertionPoint(
 495   long                              lPos
 496 )
 497 {
 498     HWND                            hWnd = GetHwnd();
 499
 500     if (m_bIsMLE)
 501         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lPos, (MPARAM)lPos);
 502     else
 503         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lPos, (USHORT)lPos), (MPARAM)0);
 504 } // end of wxTextCtrl::SetInsertionPoint
 505
 506 void wxTextCtrl::SetInsertionPointEnd()
 507 {
 508     long                            lPos = GetLastPosition();
 509
 510     SetInsertionPoint(lPos);
 511 } // end of wxTextCtrl::SetInsertionPointEnd
 512
 513 long wxTextCtrl::GetInsertionPoint() const
 514 {
 515     WXDWORD                         dwPos = 0L;
 516
 517     if (m_bIsMLE)
 518         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), MLM_QUERYSEL, (MPARAM)MLFQS_MINSEL, 0);
 519     else
 520     {
 521         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), EM_QUERYSEL, 0, 0);
 522         dwPos = SHORT1FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 523     }
 524     return (dwPos & 0xFFFF);
 525 } // end of wxTextCtrl::GetInsertionPoint
 526
 527 long wxTextCtrl::GetLastPosition() const
 528 {
 529     HWND                            hWnd = GetHwnd();
 530     long                            lCharIndex;
 531     long                            lLineLength;
 532
 533     if (m_bIsMLE)
 534     {
 535         lCharIndex = 0;
 536
 537         //
 538         // This just gets the total text length.  The last will be this value
 539         //
 540         lLineLength = (long)::WinSendMsg(hWnd, MLM_QUERYTEXTLENGTH, 0, 0);
 541     }
 542     else
 543     {
 544         WNDPARAMS                   vParams;
 545
 546         lCharIndex = 0;
 547         vParams.fsStatus = WPM_CCHTEXT;
 548         if (::WinSendMsg( GetHwnd()
 549                          ,WM_QUERYWINDOWPARAMS
 550                          ,&vParams
 551                          ,0
 552                         ))
 553         {
 554             lLineLength = (long)vParams.cchText;
 555         }
 556         else
 557             lLineLength = 0;
 558     }
 559     return(lCharIndex + lLineLength);
 560 } // end of wxTextCtrl::GetLastPosition
 561
 562 // If the return values from and to are the same, there is no
 563 // selection.
 564 void wxTextCtrl::GetSelection(
 565   long*                             plFrom
 566 , long*                             plTo
 567 ) const
 568 {
 569     WXDWORD                         dwPos;
 570
 571     if (m_bIsMLE)
 572         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), MLM_QUERYSEL, (MPARAM)MLFQS_MINSEL, 0);
 573     else
 574     {
 575         dwPos = (WXDWORD)::WinSendMsg(GetHwnd(), EM_QUERYSEL, 0, 0);
 576     }
 577     *plFrom = SHORT1FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 578     *plTo = SHORT2FROMMP((MPARAM)dwPos);  // the first 16 bit value is the min pos
 579 } // end of wxTextCtrl::GetSelection
 580
 581 bool wxTextCtrl::IsEditable() const
 582 {
 583     if (m_bIsMLE)
 584         return((bool)LONGFROMMR(::WinSendMsg(GetHwnd(), MLM_QUERYREADONLY, 0, 0)));
 585     else
 586         return((bool)LONGFROMMR(::WinSendMsg(GetHwnd(), EM_QUERYREADONLY, 0, 0)));
 587 } // end of wxTextCtrl::IsEditable
 588
 589 // ----------------------------------------------------------------------------
 590 // Editing
 591 // ----------------------------------------------------------------------------
 592
 593 void wxTextCtrl::Replace(
 594   long                              lFrom
 595 , long                              lTo
 596 , const wxString&                   rsValue
 597 )
 598 {
 599 #if wxUSE_CLIPBOARD
 600     HWND                            hWnd      = GetHwnd();
 601     long                            lFromChar = lFrom;
 602     long                            lToChar   = lTo;
 603
 604     //
 605     // Set selection and remove it
 606     //
 607     if (m_bIsMLE)
 608     {
 609         ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 610         ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 611     }
 612     else
 613     {
 614         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 615         ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 616     }
 617
 618     //
 619     // Now replace with 'value', by pasting.
 620     //
 621     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)rsValue, 0, 0);
 622
 623     // Paste into edit control
 624     if (m_bIsMLE)
 625         ::WinSendMsg(hWnd, MLM_PASTE, (MPARAM)0, (MPARAM)0);
 626     else
 627         ::WinSendMsg(hWnd, EM_PASTE, (MPARAM)0, (MPARAM)0);
 628 #else
 629     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 630 #endif
 631 }  // end of wxTextCtrl::Replace
 632
 633 void wxTextCtrl::Remove(
 634   long                              lFrom
 635 , long                              lTo
 636 )
 637 {
 638     HWND                            hWnd      = GetHwnd();
 639     long                            lFromChar = lFrom;
 640     long                            lToChar   = lTo;
 641
 642     if (m_bIsMLE)
 643     {
 644         ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 645         ::WinSendMsg(hWnd, MLM_CUT, 0, 0);
 646     }
 647     else
 648     {
 649         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFrom, (USHORT)lTo), 0);
 650         ::WinSendMsg(hWnd, EM_CUT, 0, 0);
 651     }
 652 } // end of wxTextCtrl::Remove
 653
 654 void wxTextCtrl::SetSelection(
 655   long                              lFrom
 656 , long                              lTo
 657 )
 658 {
 659     HWND                            hWnd = GetHwnd();
 660     long                            lFromChar = lFrom;
 661     long                            lToChar = lTo;
 662
 663     //
 664     // If from and to are both -1, it means (in wxWindows) that all text should
 665     // be selected. Translate into Windows convention
 666     //
 667     if ((lFrom == -1L) && (lTo == -1L))
 668     {
 669         lFromChar = 0L;
 670         lToChar   = -1L;
 671     }
 672     if (m_bIsMLE)
 673         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lFromChar, (MPARAM)lToChar);
 674     else
 675         ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lFromChar, (USHORT)lToChar), (MPARAM)0);
 676 } // end of wxTextCtrl::SetSelection
 677
 678 bool wxTextCtrl::LoadFile(
 679   const wxString&                   rsFile
 680 )
 681 {
 682     if ( wxTextCtrlBase::LoadFile(rsFile) )
 683     {
 684         //
 685         // Update the size limit if needed
 686         //
 687         AdjustSpaceLimit();
 688         return TRUE;
 689     }
 690     return FALSE;
 691 } // end of wxTextCtrl::LoadFile
 692
 693 bool wxTextCtrl::IsModified() const
 694 {
 695     bool                            bRc;
 696
 697     if (m_bIsMLE)
 698         bRc = (bool)LONGFROMMR(::WinSendMsg(GetHwnd(), MLM_QUERYCHANGED, 0, 0));
 699     else
 700         bRc = (bool)LONGFROMMR(::WinSendMsg(GetHwnd(), EM_QUERYCHANGED, 0, 0));
 701     return bRc;
 702 } // end of wxTextCtrl::IsModified
 703
 704 //
 705 // Makes 'unmodified'
 706 //
 707 void wxTextCtrl::DiscardEdits()
 708 {
 709     if (m_bIsMLE)
 710         ::WinSendMsg(GetHwnd(), MLM_SETCHANGED, MPFROMLONG(FALSE), 0);
 711     else
 712         //
 713         // EM controls do not have a SETCHANGED but issuing a query should reset it
 714         //
 715         ::WinSendMsg(GetHwnd(), EM_QUERYCHANGED, 0, 0);
 716 } // end of wxTextCtrl::DiscardEdits
 717
 718 int wxTextCtrl::GetNumberOfLines() const
 719 {
 720     int                             nNumLines;
 721
 722     if (m_bIsMLE)
 723         nNumLines = (int)::WinSendMsg(GetHwnd(), MLM_QUERYLINECOUNT, 0, 0);
 724     else
 725         nNumLines = 1;
 726     return nNumLines;
 727 } // end of wxTextCtrl::GetNumberOfLines
 728
 729 long wxTextCtrl::XYToPosition(
 730   long                              lX
 731 , long                              lY
 732 ) const
 733 {
 734     HWND                            hWnd = GetHwnd();
 735     long                            lCharIndex = 0L;
 736     long                            lLen;
 737
 738     if (m_bIsMLE)
 739     {
 740         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 741         lCharIndex = ((lLen * lY) + lX);
 742     }
 743     else
 744         lCharIndex = lX;
 745     return lCharIndex;
 746 } // end of wxTextCtrl::XYToPosition
 747
 748 bool wxTextCtrl::PositionToXY(
 749   long                              lPos
 750 , long*                             plX
 751 , long*                             plY
 752 ) const
 753 {
 754     HWND                            hWnd = GetHwnd();
 755     long                            nLineNo = -1;
 756     long                            lCharIndex = 0;
 757
 758     if (m_bIsMLE)
 759         nLineNo = (long)::WinSendMsg(hWnd, MLM_LINEFROMCHAR, (MPARAM)lPos, 0);
 760     else
 761         nLineNo = 0;
 762
 763     if (nLineNo == -1)
 764     {
 765         // no such line
 766         return FALSE;
 767     }
 768
 769     //
 770     // This gets the char index for the _beginning_ of this line
 771     //
 772     long                            lLineWidth;
 773
 774     if (m_bIsMLE)
 775     {
 776         lLineWidth = (long)::WinSendMsg(hWnd, MLM_QUERYLINELENGTH, (MPARAM)0, (MPARAM)0);
 777         lCharIndex = (nLineNo + 1) * lLineWidth;
 778     }
 779     else
 780     {
 781         WNDPARAMS                   vParams;
 782
 783         vParams.fsStatus = WPM_CCHTEXT;
 784         if (::WinSendMsg( hWnd
 785                          ,WM_QUERYWINDOWPARAMS
 786                          ,&vParams
 787                          ,0
 788                         ))
 789         {
 790             lCharIndex = vParams.cchText;
 791         }
 792         else
 793             lCharIndex = 32;
 794     }
 795
 796     if (lCharIndex == -1)
 797     {
 798         return FALSE;
 799     }
 800
 801     //
 802     // The X position must therefore be the difference between pos and charIndex
 803     //
 804     if (plX)
 805         *plX = lPos - lCharIndex;
 806     if (plY)
 807         *plY = nLineNo;
 808
 809     return TRUE;
 810 } // end of wxTextCtrl::PositionToXY
 811
 812 void wxTextCtrl::ShowPosition(
 813   long                              lPos
 814 )
 815 {
 816     HWND                            hWnd = GetHwnd();
 817     long                            lCurrentLineLineNo = 0L;
 818
 819     // To scroll to a position, we pass the number of lines and characters
 820     // to scroll *by*. This means that we need to:
 821     // (1) Find the line position of the current line.
 822     // (2) Find the line position of pos.
 823     // (3) Scroll by (pos - current).
 824     // For now, ignore the horizontal scrolling.
 825
 826     //
 827     // Is this where scrolling is relative to - the line containing the caret?
 828     // Or is the first visible line??? Try first visible line.
 829     //
 830     if (m_bIsMLE)
 831     {
 832         //
 833         // In PM this is the actual char position
 834         //
 835         lCurrentLineLineNo = (long)::WinSendMsg(hWnd, MLM_QUERYFIRSTCHAR, (MPARAM)0, (MPARAM)0);
 836
 837         //
 838         // This will cause a scroll to the selected position
 839         //
 840         ::WinSendMsg(hWnd, MLM_SETSEL, (MPARAM)lCurrentLineLineNo, (MPARAM)lCurrentLineLineNo);
 841     }
 842 } // end of wxTextCtrl::ShowPosition
 843
 844 int wxTextCtrl::GetLineLength(
 845   long                              lLineNo
 846 ) const
 847 {
 848     long                            lLen = 0L;
 849
 850     if (m_bIsMLE)
 851         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 852     else
 853     {
 854         WNDPARAMS                   vParams;
 855
 856         vParams.fsStatus = WPM_CCHTEXT;
 857         if (::WinSendMsg( GetHwnd()
 858                          ,WM_QUERYWINDOWPARAMS
 859                          ,&vParams
 860                          ,0
 861                         ))
 862         {
 863             lLen = vParams.cchText;
 864         }
 865         else
 866             lLen = 32;
 867     }
 868     return lLen;
 869 } // end ofwxTextCtrl::GetLineLength
 870
 871 wxString wxTextCtrl::GetLineText(
 872   long                              lLineNo
 873 ) const
 874 {
 875     long                            lLen = (long)GetLineLength((long)lLineNo) + 1;
 876     wxString                        sStr;
 877     char*                           zBuf;
 878
 879     //
 880     // There must be at least enough place for the length WORD in the
 881     // buffer
 882     //
 883     lLen += sizeof(WORD);
 884     zBuf = new char[lLen];
 885     if (m_bIsMLE)
 886     {
 887         long                        lIndex;
 888         long                        lBuflen;
 889         long                        lCopied;
 890
 891         lLen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYLINELENGTH, 0, 0);
 892         lIndex = lLen * lLineNo;
 893
 894         ::WinSendMsg(GetHwnd(), MLM_SETSEL, (MPARAM)lIndex, (MPARAM)lIndex);
 895         ::WinSendMsg(GetHwnd(), MLM_SETIMPORTEXPORT, MPFROMP(zBuf), MPFROMSHORT((USHORT)sizeof(zBuf)));
 896         lBuflen = (long)::WinSendMsg(GetHwnd(), MLM_QUERYFORMATTEXTLENGTH, MPFROMLONG(lIndex), MPFROMLONG(-1));
 897         lCopied = (long)::WinSendMsg(GetHwnd(), MLM_EXPORT, MPFROMP(&lIndex), MPFROMP(&lBuflen));
 898         zBuf[lCopied] = '\0';
 899     }
 900     else
 901     {
 902         WNDPARAMS                   vParams;
 903
 904         vParams.fsStatus = WPM_CCHTEXT;
 905         if (::WinSendMsg( GetHwnd()
 906                          ,WM_QUERYWINDOWPARAMS
 907                          ,&vParams
 908                          ,0
 909                         ))
 910          memcpy(zBuf, vParams.pszText, vParams.cchText);
 911          zBuf[vParams.cchText] = '\0';
 912      }
 913      sStr = zBuf;
 914      delete [] zBuf;
 915      return sStr;
 916 } // end of wxTextCtrl::GetLineText
 917
 918 // ----------------------------------------------------------------------------
 919 // Undo/redo
 920 // ----------------------------------------------------------------------------
 921
 922 void wxTextCtrl::Undo()
 923 {
 924     if (CanUndo())
 925     {
 926         if (m_bIsMLE)
 927             ::WinSendMsg(GetHwnd(), MLM_UNDO, 0, 0);
 928         // Simple entryfields cannot be undone
 929     }
 930 } // end of wxTextCtrl::Undo
 931
 932 void wxTextCtrl::Redo()
 933 {
 934     if (CanRedo())
 935     {
 936         if (m_bIsMLE)
 937             ::WinSendMsg(GetHwnd(), MLM_UNDO, 0, 0);
 938         // Simple entryfields cannot be undone
 939     }
 940 } // end of wxTextCtrl::Redo
 941
 942 bool wxTextCtrl::CanUndo() const
 943 {
 944     bool                            bOk;
 945
 946     if (m_bIsMLE)
 947         bOk = (::WinSendMsg(GetHwnd(), MLM_QUERYUNDO, 0, 0) != 0);
 948     else
 949         bOk = FALSE; // can't undo regular edit fields in PM
 950     return bOk;
 951 } // end of wxTextCtrl::CanUndo
 952
 953 bool wxTextCtrl::CanRedo() const
 954 {
 955     bool                            bOk;
 956
 957     if (m_bIsMLE)
 958         bOk = (::WinSendMsg(GetHwnd(), MLM_QUERYUNDO, 0, 0) != 0);
 959     else
 960         bOk = FALSE; // can't undo regular edit fields in PM
 961     return bOk;
 962 } // end of wxTextCtrl::CanRedo
 963
 964 // ----------------------------------------------------------------------------
 965 // implemenation details
 966 // ----------------------------------------------------------------------------
 967
 968 void wxTextCtrl::Command(
 969   wxCommandEvent&                   rEvent
 970 )
 971 {
 972     SetValue(rEvent.GetString());
 973     ProcessCommand (rEvent);
 974 } // end of wxTextCtrl::Command
 975
 976 void wxTextCtrl::OnDropFiles(
 977   wxDropFilesEvent&                 rEvent
 978 )
 979 {
 980     // By default, load the first file into the text window.
 981     if (rEvent.GetNumberOfFiles() > 0)
 982     {
 983         LoadFile(rEvent.GetFiles()[0]);
 984     }
 985 } // end of wxTextCtrl::OnDropFiles
 986
 987 WXHBRUSH wxTextCtrl::OnCtlColor(
 988   WXHDC                             hWxDC
 989 , WXHWND                            hWnd
 990 , WXUINT                            uCtlColor
 991 , WXUINT                            uMessage
 992 , WXWPARAM                          wParam
 993 , WXLPARAM                          lParam
 994 )
 995 {
 996     HPS                             hPS = (HPS)hWxDC;
 997     wxBrush*                        pBrush = NULL;
 998     wxColour                        vColBack = GetBackgroundColour();
 999     wxColour                        vColFore = GetForegroundColour();
1000     wxBrush*                        pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
1001                                                                                          ,wxSOLID
1002                                                                                         );
1003
1004     if (m_bUseCtl3D)
1005     {
1006         HBRUSH                      hBrush = NULLHANDLE;
1007
1008         return hBrush;
1009     }
1010     if (GetParent()->GetTransparentBackground())
1011         ::GpiSetBackMix(hPS, BM_LEAVEALONE);
1012     else
1013         ::GpiSetBackMix(hPS, BM_OVERPAINT);
1014     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1015         vColBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1016     ::GpiSetBackColor(hPS, vColBack.GetPixel());
1017     ::GpiSetColor(hPS, vColFore.GetPixel());
1018     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
1019 } // end of wxTextCtrl::OnCtlColor
1020
1021 bool wxTextCtrl::OS2ShouldPreProcessMessage(
1022   WXMSG*                            pMsg
1023 )
1024 {
1025     return wxControl::OS2ShouldPreProcessMessage(pMsg);
1026 } // end of wxTextCtrl::OS2ShouldPreProcessMessage
1027
1028 void wxTextCtrl::OnChar(
1029   wxKeyEvent&                       rEvent
1030 )
1031 {
1032     switch (rEvent.KeyCode())
1033     {
1034         case WXK_RETURN:
1035             if ( !(m_windowStyle & wxTE_MULTILINE) )
1036             {
1037                 wxCommandEvent      vEvent(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1038
1039                 vEvent.SetEventObject(this);
1040                 if ( GetEventHandler()->ProcessEvent(vEvent))
1041                     return;
1042             }
1043             //else: multiline controls need Enter for themselves
1044
1045             break;
1046
1047         case WXK_TAB:
1048             // always produce navigation event - even if we process TAB
1049             // ourselves the fact that we got here means that the user code
1050             // decided to skip processing of this TAB - probably to let it
1051             // do its default job.
1052             //
1053             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1054             //     handled by Windows
1055             {
1056                 wxNavigationKeyEvent    vEventNav;
1057
1058                 vEventNav.SetDirection(!rEvent.ShiftDown());
1059                 vEventNav.SetWindowChange(FALSE);
1060                 vEventNav.SetEventObject(this);
1061
1062                 if ( GetEventHandler()->ProcessEvent(vEventNav) )
1063                     return;
1064             }
1065             break;
1066     }
1067     rEvent.Skip();
1068 } // end of wxTextCtrl::OnChar
1069
1070 bool wxTextCtrl::OS2Command(
1071   WXUINT                            uParam
1072 , WXWORD                            WXUNUSED(vId)
1073 )
1074 {
1075     switch (uParam)
1076     {
1077         case EN_SETFOCUS:
1078         case EN_KILLFOCUS:
1079             {
1080                 wxFocusEvent        vEvent( uParam == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1081                                                                    : wxEVT_SET_FOCUS
1082                                            ,m_windowId
1083                                           );
1084
1085                 vEvent.SetEventObject(this);
1086                 GetEventHandler()->ProcessEvent(vEvent);
1087             }
1088             break;
1089
1090         case EN_CHANGE:
1091             {
1092                 wxCommandEvent      vEvent( wxEVT_COMMAND_TEXT_UPDATED
1093                                            ,m_windowId
1094                                           );
1095
1096                 InitCommandEvent(vEvent);
1097                 vEvent.SetString((char*)GetValue().c_str());
1098                 ProcessCommand(vEvent);
1099             }
1100             break;
1101
1102         case EN_OVERFLOW:
1103             //
1104             // The text size limit has been hit - increase it
1105             //
1106             AdjustSpaceLimit();
1107             break;
1108
1109         case EN_SCROLL:
1110         case EN_INSERTMODETOGGLE:
1111         case EN_MEMERROR:
1112             return FALSE;
1113         default:
1114             return FALSE;
1115     }
1116
1117     //
1118     // Processed
1119     //
1120     return TRUE;
1121 } // end of wxTextCtrl::OS2Command
1122
1123 void wxTextCtrl::AdjustSpaceLimit()
1124 {
1125     unsigned int                    uLen = 0;
1126     unsigned int                    uLimit = 0;
1127
1128     uLen   = ::WinQueryWindowTextLength(GetHwnd());
1129     if (m_bIsMLE)
1130     {
1131         uLimit = (unsigned int)::WinSendMsg( GetHwnd()
1132                                             ,MLM_QUERYTEXTLIMIT
1133                                             ,0
1134                                             ,0
1135                                            );
1136     }
1137     else
1138     {
1139         ENTRYFDATA*                 pEfd;
1140         WNDPARAMS                   vParams;
1141
1142         vParams.fsStatus = WPM_CBCTLDATA;
1143         vParams.cbCtlData = sizeof(ENTRYFDATA);
1144
1145         if (::WinSendMsg( GetHwnd()
1146                          ,WM_QUERYWINDOWPARAMS
1147                          ,&vParams
1148                          ,0
1149                         ))
1150         {
1151             pEfd = (ENTRYFDATA*)vParams.pCtlData;
1152             uLimit = (unsigned int)pEfd->cchEditLimit;
1153         }
1154         else
1155             uLimit = 32; //PM's default
1156     }
1157     if (uLen >= uLimit)
1158     {
1159         uLimit = uLen + 0x8000;    // 32Kb
1160         if (uLimit > 0xffff)
1161         {
1162             uLimit = 0L;
1163         }
1164         if (m_bIsMLE)
1165             ::WinSendMsg(GetHwnd(), MLM_SETTEXTLIMIT, MPFROMLONG(uLimit), 0);
1166         else
1167             ::WinSendMsg(GetHwnd(), EM_SETTEXTLIMIT, MPFROMLONG(uLimit), 0);
1168     }
1169 } // end of wxTextCtrl::AdjustSpaceLimit
1170
1171 bool wxTextCtrl::AcceptsFocus() const
1172 {
1173     //
1174     // We don't want focus if we can't be edited unless we're a multiline
1175     // control because then it might be still nice to get focus from keyboard
1176     // to be able to scroll it without mouse
1177     //
1178     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1179 } // end of wxTextCtrl::Command
1180
1181 wxSize wxTextCtrl::DoGetBestSize() const
1182 {
1183     int                             nCx;
1184     int                             nCy;
1185
1186     wxGetCharSize(GetHWND(), &nCx, &nCy, (wxFont*)&GetFont());
1187
1188     int                             wText = DEFAULT_ITEM_WIDTH;
1189     int                             hText = (EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * .8);
1190
1191     if (m_windowStyle & wxTE_MULTILINE)
1192     {
1193         hText *= wxMax(GetNumberOfLines(), 5);
1194     }
1195     //else: for single line control everything is ok
1196     return wxSize(wText, hText);
1197 } // end of wxTextCtrl::DoGetBestSize
1198
1199 // ----------------------------------------------------------------------------
1200 // standard handlers for standard edit menu events
1201 // ----------------------------------------------------------------------------
1202
1203 void wxTextCtrl::OnCut(
1204   wxCommandEvent&                   rEvent
1205 )
1206 {
1207     Cut();
1208 } // end of wxTextCtrl::OnCut
1209
1210 void wxTextCtrl::OnCopy(
1211   wxCommandEvent&                   rEvent
1212 )
1213 {
1214     Copy();
1215 } // end of wxTextCtrl::OnCopy
1216
1217 void wxTextCtrl::OnPaste(
1218   wxCommandEvent&                   rEvent
1219 )
1220 {
1221     Paste();
1222 } // end of wxTextCtrl::OnPaste
1223
1224 void wxTextCtrl::OnUndo(
1225   wxCommandEvent&                   rEvent
1226 )
1227 {
1228     Undo();
1229 } // end of wxTextCtrl::OnUndo
1230
1231 void wxTextCtrl::OnRedo(
1232   wxCommandEvent&                   rEvent
1233 )
1234 {
1235     Redo();
1236 } // end of wxTextCtrl::OnRedo
1237
1238 void wxTextCtrl::OnDelete(
1239   wxCommandEvent&                   rEvent
1240 )
1241 {
1242     long                            lFrom;
1243     long                            lTo;
1244
1245     GetSelection( &lFrom
1246                  ,&lTo
1247                 );
1248     if (lFrom != -1 && lTo != -1)
1249         Remove( lFrom
1250                ,lTo
1251               );
1252 } // end of wxTextCtrl::OnDelete
1253
1254 void wxTextCtrl::OnSelectAll(
1255   wxCommandEvent&                   rEvent
1256 )
1257 {
1258     SetSelection(-1, -1);
1259 } // end of wxTextCtrl::OnSelectAll
1260
1261 void wxTextCtrl::OnUpdateCut(
1262   wxUpdateUIEvent&                  rEvent
1263 )
1264 {
1265     rEvent.Enable(CanCut());
1266 } // end of wxTextCtrl::OnUpdateCut
1267
1268 void wxTextCtrl::OnUpdateCopy(
1269   wxUpdateUIEvent&                  rEvent
1270 )
1271 {
1272     rEvent.Enable(CanCopy());
1273 } // end of wxTextCtrl::OnUpdateCopy
1274
1275 void wxTextCtrl::OnUpdatePaste(
1276   wxUpdateUIEvent&                  rEvent
1277 )
1278 {
1279     rEvent.Enable(CanPaste());
1280 } // end of wxTextCtrl::OnUpdatePaste
1281
1282 void wxTextCtrl::OnUpdateUndo(
1283   wxUpdateUIEvent&                  rEvent
1284 )
1285 {
1286     rEvent.Enable(CanUndo());
1287 } // end of wxTextCtrl::OnUpdateUndo
1288
1289 void wxTextCtrl::OnUpdateRedo(
1290   wxUpdateUIEvent&                  rEvent
1291 )
1292 {
1293     rEvent.Enable(CanRedo());
1294 } // end of wxTextCtrl::OnUpdateRedo
1295
1296 void wxTextCtrl::OnUpdateDelete(
1297   wxUpdateUIEvent&                  rEvent
1298 )
1299 {
1300     long                            lFrom;
1301     long                            lTo;
1302
1303     GetSelection( &lFrom
1304                  ,&lTo
1305                 );
1306     rEvent.Enable( lFrom != -1L && lTo != -1L && lFrom != lTo && IsEditable()) ;
1307 } // end of wxTextCtrl::OnUpdateDelete
1308
1309 void wxTextCtrl::OnUpdateSelectAll(
1310   wxUpdateUIEvent&                  rEvent
1311 )
1312 {
1313     rEvent.Enable(GetLastPosition() > 0);
1314 } // end of wxTextCtrl::OnUpdateSelectAll
1315
1316 bool wxTextCtrl::SetBackgroundColour(
1317   const wxColour&                   rColour
1318 )
1319 {
1320     if (m_bIsMLE)
1321         ::WinSendMsg(GetHwnd(), MLM_SETBACKCOLOR, (MPARAM)rColour.GetPixel(), MLE_INDEX);
1322     return TRUE;
1323 } // end of wxTextCtrl::SetBackgroundColour
1324
1325 bool wxTextCtrl::SetForegroundColour(
1326   const wxColour&                   rColour
1327 )
1328 {
1329     if (m_bIsMLE)
1330         ::WinSendMsg(GetHwnd(), MLM_SETTEXTCOLOR, (MPARAM)rColour.GetPixel(), MLE_INDEX);
1331     return TRUE;
1332 } // end of wxTextCtrl::SetForegroundColour
1333
1334 bool wxTextCtrl::SetStyle(
1335   long                              lStart
1336 , long                              lEnd
1337 , const wxTextAttr&                 rStyle
1338 )
1339 {
1340     HWND                            hWnd = GetHwnd();
1341
1342     if (lStart > lEnd)
1343     {
1344         long                        lTmp = lStart;
1345
1346         lStart = lEnd;
1347         lEnd   = lTmp;
1348     }
1349
1350     //
1351     // We can only change the format of the selection, so select the range we
1352     // want and restore the old selection later
1353     //
1354     long                            lStartOld;
1355     long                            lEndOld;
1356
1357     GetSelection( &lStartOld
1358                  ,&lEndOld
1359                 );
1360
1361     //
1362     // But do we really have to change the selection?
1363     //
1364     bool                            bChangeSel = lStart != lStartOld ||
1365                                                  lEnd != lEndOld;
1366
1367     if (bChangeSel)
1368     {
1369         if (m_bIsMLE)
1370             ::WinSendMsg(hWnd, MLM_SETSEL, MPFROM2SHORT((USHORT)lStart, (USHORT)lEnd), 0);
1371         else
1372             ::WinSendMsg(hWnd, EM_SETSEL, MPFROM2SHORT((USHORT)lStart, (USHORT)lEnd), 0);
1373     }
1374
1375     //
1376     // TODO:: finish this part
1377     //
1378     return TRUE;
1379 } // end of wxTextCtrl::SetStyle
1380