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