src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "textctrl.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/textctrl.h"
  25 #include "wx/settings.h"
  26 #include "wx/brush.h"
  27 #include "wx/utils.h"
  28 #include "wx/log.h"
  29 #endif
  30
  31 #if wxUSE_CLIPBOARD
  32 #include "wx/app.h"
  33 #include "wx/clipbrd.h"
  34 #endif
  35
  36 #include "wx/msw/private.h"
  37
  38 #include <windows.h>
  39 #include <stdlib.h>
  40
  41 #if wxUSE_IOSTREAMH
  42 #   include <fstream.h>
  43 #else
  44 #   include <fstream>
  45 #endif
  46
  47 #include <sys/types.h>
  48 #ifndef __MWERKS__
  49 #include <sys/stat.h>
  50 #else
  51 #include <stat.h>
  52 #endif
  53 #if defined(__BORLANDC__) && !defined(__WIN32__)
  54 #include <alloc.h>
  55 #else
  56 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
  57 #include <malloc.h>
  58 #endif
  59 #define farmalloc malloc
  60 #define farfree free
  61 #endif
  62 #include <windowsx.h>
  63
  64 #include <string.h>
  65
  66 #if wxUSE_RICHEDIT && !defined(__GNUWIN32__)
  67     #include <richedit.h>
  68 #endif
  69
  70 #if !USE_SHARED_LIBRARY
  71
  72 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  73
  74 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  75   EVT_CHAR(wxTextCtrl::OnChar)
  76   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  77
  78   EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  79   EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  80   EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  81   EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  82   EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  83
  84   EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  85   EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  86   EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  87   EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  88   EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  89 END_EVENT_TABLE()
  90
  91 #endif // USE_SHARED_LIBRARY
  92
  93 // Text item
  94 wxTextCtrl::wxTextCtrl()
  95 #ifndef NO_TEXT_WINDOW_STREAM
  96           : streambuf()
  97 #endif
  98 {
  99 #if wxUSE_RICHEDIT
 100   m_isRich = FALSE;
 101 #endif
 102 }
 103
 104 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 105                         const wxString& value,
 106                         const wxPoint& pos,
 107                         const wxSize& size, long style,
 108                         const wxValidator& validator,
 109                         const wxString& name)
 110 {
 111   SetName(name);
 112   SetValidator(validator);
 113   if (parent) parent->AddChild(this);
 114
 115   m_windowStyle = style;
 116
 117   // Should this be taken from the system colours?
 118 //  SetBackgroundColour(wxColour(255, 255, 255));
 119
 120   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 121
 122   SetForegroundColour(parent->GetForegroundColour()) ;
 123
 124   if ( id == -1 )
 125     m_windowId = (int)NewControlId();
 126   else
 127   m_windowId = id;
 128
 129   int x = pos.x;
 130   int y = pos.y;
 131   int width = size.x;
 132   int height = size.y;
 133
 134   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 135   if (m_windowStyle & wxTE_MULTILINE)
 136   {
 137     wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 138                   _T("wxTE_PROCESS_ENTER style is ignored for multiline controls") );
 139
 140     msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 141     m_windowStyle |= wxTE_PROCESS_ENTER;
 142   }
 143   else
 144     msStyle |= ES_AUTOHSCROLL ;
 145
 146   if (m_windowStyle & wxTE_READONLY)
 147     msStyle |= ES_READONLY;
 148
 149   if (m_windowStyle & wxHSCROLL)
 150     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 151   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 152     msStyle |= ES_PASSWORD;
 153
 154     // we always want the characters and the arrows
 155     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 156
 157     // we may have several different cases:
 158     // 1. normal case: both TAB and ENTER are used for dialog navigation
 159     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 160     //    control in the dialog
 161     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 162     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 163     //    the next control
 164     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 165         m_lDlgCode |= DLGC_WANTMESSAGE;
 166     if ( m_windowStyle & wxTE_PROCESS_TAB )
 167         m_lDlgCode |= DLGC_WANTTAB;
 168
 169   const wxChar *windowClass = _T("EDIT");
 170
 171 #if wxUSE_RICHEDIT
 172   if ( m_windowStyle & wxTE_MULTILINE )
 173   {
 174     msStyle |= ES_AUTOVSCROLL;
 175     m_isRich = TRUE;
 176     windowClass = _T("RichEdit") ;
 177   }
 178   else
 179     m_isRich = FALSE;
 180 #endif
 181
 182   bool want3D;
 183   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 184
 185   // If we're in Win95, and we want a simple 2D border,
 186   // then make it an EDIT control instead.
 187 #if wxUSE_RICHEDIT
 188   if (m_windowStyle & wxSIMPLE_BORDER)
 189   {
 190     windowClass = _T("EDIT");
 191     m_isRich = FALSE;
 192   }
 193 #endif
 194
 195   // Even with extended styles, need to combine with WS_BORDER
 196   // for them to look right.
 197   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 198     msStyle |= WS_BORDER;
 199
 200   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 201                         msStyle,
 202                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 203                         wxGetInstance(), NULL);
 204
 205   wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create text ctrl") );
 206
 207 #if wxUSE_CTL3D
 208   if ( want3D )
 209   {
 210     Ctl3dSubclassCtl((HWND)m_hWnd);
 211     m_useCtl3D = TRUE;
 212   }
 213 #endif
 214
 215 #if wxUSE_RICHEDIT
 216   if (m_isRich)
 217   {
 218     // Have to enable events
 219     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 220                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 221   }
 222 #endif
 223
 224   SubclassWin(GetHWND());
 225
 226   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 227   {
 228     SetFont(parent->GetFont());
 229   }
 230   else
 231   {
 232     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 233   }
 234
 235   SetSize(x, y, width, height);
 236
 237   // Causes a crash for Symantec C++ and WIN32 for some reason
 238 #if !(defined(__SC__) && defined(__WIN32__))
 239   if ( !value.IsEmpty() )
 240   {
 241     SetValue(value);
 242   }
 243 #endif
 244
 245   return TRUE;
 246 }
 247
 248 // Make sure the window style (etc.) reflects the HWND style (roughly)
 249 void wxTextCtrl::AdoptAttributesFromHWND()
 250 {
 251   wxWindow::AdoptAttributesFromHWND();
 252
 253   HWND hWnd = GetHwnd();
 254   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 255
 256   // retrieve the style to see whether this is an edit or richedit ctrl
 257 #if wxUSE_RICHEDIT
 258   wxChar buf[256];
 259
 260 #ifndef __WIN32__
 261   GetClassName((HWND) hWnd, buf, 256);
 262 #else
 263 #ifdef UNICODE
 264   GetClassNameW((HWND) hWnd, buf, 256);
 265 #else
 266 #ifdef __TWIN32__
 267   GetClassName((HWND) hWnd, buf, 256);
 268 #else
 269   GetClassNameA((HWND) hWnd, buf, 256);
 270 #endif
 271 #endif
 272 #endif
 273
 274   wxString str(buf);
 275   str.UpperCase();
 276
 277   if (str == _T("EDIT"))
 278     m_isRich = FALSE;
 279   else
 280     m_isRich = TRUE;
 281 #endif
 282
 283   if (style & ES_MULTILINE)
 284     m_windowStyle |= wxTE_MULTILINE;
 285   if (style & ES_PASSWORD)
 286     m_windowStyle |= wxTE_PASSWORD;
 287   if (style & ES_READONLY)
 288     m_windowStyle |= wxTE_READONLY;
 289   if (style & ES_WANTRETURN)
 290     m_windowStyle |= wxTE_PROCESS_ENTER;
 291 }
 292
 293 void wxTextCtrl::SetupColours()
 294 {
 295   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 296   SetForegroundColour(GetParent()->GetForegroundColour());
 297 }
 298
 299 wxString wxTextCtrl::GetValue() const
 300 {
 301     return wxGetWindowText(GetHWND());
 302 }
 303
 304 void wxTextCtrl::SetValue(const wxString& value)
 305 {
 306   // If newlines are denoted by just 10, must stick 13 in front.
 307   int singletons = 0;
 308   int len = value.Length();
 309   int i;
 310   for (i = 0; i < len; i ++)
 311   {
 312     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 313       singletons ++;
 314   }
 315   if (singletons > 0)
 316   {
 317     wxChar *tmp = new wxChar[len + singletons + 1];
 318     int j = 0;
 319     for (i = 0; i < len; i ++)
 320     {
 321       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 322       {
 323         tmp[j] = 13;
 324         j ++;
 325       }
 326       tmp[j] = value[i];
 327       j ++;
 328     }
 329     tmp[j] = 0;
 330     SetWindowText(GetHwnd(), tmp);
 331     delete[] tmp;
 332   }
 333   else
 334     SetWindowText(GetHwnd(), (const wxChar *)value);
 335
 336   AdjustSpaceLimit();
 337 }
 338
 339 void wxTextCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 340 {
 341   int currentX, currentY;
 342   GetPosition(&currentX, &currentY);
 343   int x1 = x;
 344   int y1 = y;
 345   int w1 = width;
 346   int h1 = height;
 347
 348   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 349     x1 = currentX;
 350   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 351     y1 = currentY;
 352
 353   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 354
 355   int cx; // button font dimensions
 356   int cy;
 357
 358   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 359
 360   int control_width, control_height, control_x, control_y;
 361
 362   // If we're prepared to use the existing size, then...
 363   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 364   {
 365     GetSize(&w1, &h1);
 366   }
 367
 368   // Deal with default size (using -1 values)
 369   if (w1<=0)
 370     w1 = DEFAULT_ITEM_WIDTH;
 371
 372   control_x = x1;
 373   control_y = y1;
 374   control_width = w1;
 375   control_height = h1;
 376
 377   // Calculations may have made text size too small
 378   if (control_height <= 0)
 379     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 380
 381   if (control_width <= 0)
 382     control_width = DEFAULT_ITEM_WIDTH;
 383
 384   MoveWindow(GetHwnd(), (int)control_x, (int)control_y,
 385                               (int)control_width, (int)control_height, TRUE);
 386 }
 387
 388 // Clipboard operations
 389 void wxTextCtrl::Copy()
 390 {
 391     if (CanCopy())
 392     {
 393         HWND hWnd = GetHwnd();
 394         SendMessage(hWnd, WM_COPY, 0, 0L);
 395     }
 396 }
 397
 398 void wxTextCtrl::Cut()
 399 {
 400     if (CanCut())
 401     {
 402         HWND hWnd = GetHwnd();
 403         SendMessage(hWnd, WM_CUT, 0, 0L);
 404     }
 405 }
 406
 407 void wxTextCtrl::Paste()
 408 {
 409     if (CanPaste())
 410     {
 411         HWND hWnd = GetHwnd();
 412         SendMessage(hWnd, WM_PASTE, 0, 0L);
 413     }
 414 }
 415
 416 void wxTextCtrl::SetEditable(bool editable)
 417 {
 418   HWND hWnd = GetHwnd();
 419   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 420 }
 421
 422 void wxTextCtrl::SetInsertionPoint(long pos)
 423 {
 424   HWND hWnd = GetHwnd();
 425 #ifdef __WIN32__
 426 #if wxUSE_RICHEDIT
 427   if ( m_isRich)
 428   {
 429     CHARRANGE range;
 430     range.cpMin = pos;
 431     range.cpMax = pos;
 432     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 433     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 434   }
 435   else
 436 #endif
 437   {
 438     SendMessage(hWnd, EM_SETSEL, pos, pos);
 439     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 440   }
 441 #else
 442   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 443 #endif
 444   char *nothing = "";
 445   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 446 }
 447
 448 void wxTextCtrl::SetInsertionPointEnd()
 449 {
 450   long pos = GetLastPosition();
 451   SetInsertionPoint(pos);
 452 }
 453
 454 long wxTextCtrl::GetInsertionPoint() const
 455 {
 456 #if wxUSE_RICHEDIT
 457   if (m_isRich)
 458   {
 459     CHARRANGE range;
 460     range.cpMin = 0;
 461     range.cpMax = 0;
 462     SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 463     return range.cpMin;
 464   }
 465 #endif
 466
 467   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 468   return Pos&0xFFFF;
 469 }
 470
 471 long wxTextCtrl::GetLastPosition() const
 472 {
 473     HWND hWnd = GetHwnd();
 474
 475     // Will always return a number > 0 (according to docs)
 476     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 477
 478     // This gets the char index for the _beginning_ of the last line
 479     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 480
 481     // Get number of characters in the last line. We'll add this to the character
 482     // index for the last line, 1st position.
 483     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 484
 485     return (long)(charIndex + lineLength);
 486 }
 487
 488 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 489 {
 490 #if wxUSE_CLIPBOARD
 491     HWND hWnd = GetHwnd();
 492     long fromChar = from;
 493     long toChar = to;
 494
 495     // Set selection and remove it
 496 #ifdef __WIN32__
 497     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 498 #else
 499     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 500 #endif
 501     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 502
 503     // Now replace with 'value', by pasting.
 504     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 505
 506     // Paste into edit control
 507     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 508 #else
 509     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 510 #endif
 511 }
 512
 513 void wxTextCtrl::Remove(long from, long to)
 514 {
 515     HWND hWnd = GetHwnd();
 516     long fromChar = from;
 517     long toChar = to;
 518
 519     // Cut all selected text
 520 #ifdef __WIN32__
 521     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 522 #else
 523     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 524 #endif
 525     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 526 }
 527
 528 void wxTextCtrl::SetSelection(long from, long to)
 529 {
 530     HWND hWnd = GetHwnd();
 531     long fromChar = from;
 532     long toChar = to;
 533     // if from and to are both -1, it means
 534     // (in wxWindows) that all text should be selected.
 535     // This translates into Windows convention
 536     if ((from == -1) && (to == -1))
 537     {
 538       fromChar = 0;
 539       toChar = -1;
 540     }
 541
 542 #ifdef __WIN32__
 543     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 544     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 545 #else
 546     // WPARAM is 0: selection is scrolled into view
 547     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 548 #endif
 549 }
 550
 551 bool wxTextCtrl::LoadFile(const wxString& file)
 552 {
 553   if (!wxFileExists(WXSTRINGCAST file))
 554     return FALSE;
 555
 556   m_fileName = file;
 557
 558   Clear();
 559
 560 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 561   ifstream input(MBSTRINGCAST file.mb_str(wxConvFile), ios::in);
 562
 563   if (!input.bad())
 564   {
 565       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 566       // line by line into the control. Apart from being very slow this
 567       // was limited to 32K of text by the external interface presenting
 568       // positions as signed shorts. Now load in one chunk...
 569       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 570
 571 #ifdef __SALFORDC__
 572       struct _stat stat_buf;
 573       if (stat(MBSTRINGCAST file.mb_str(wxConvFile), &stat_buf) < 0)
 574         return FALSE;
 575 #else
 576       struct stat stat_buf;
 577       if (stat(file.mb_str(wxConvFile), &stat_buf) < 0)
 578         return FALSE;
 579 #endif
 580
 581 //      wxChar *tmp_buffer = (wxChar*)farmalloc(stat_buf.st_size+1);
 582       // This may need to be a bigger buffer than the file size suggests,
 583       // if it's a UNIX file. Give it an extra 1000 just in case.
 584       wxChar *tmp_buffer = (wxChar*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 585       char *read_buffer = new char[512];
 586       long no_lines = 0;
 587       long pos = 0;
 588       while (!input.eof() && input.peek() != EOF)
 589       {
 590         input.getline(read_buffer, 500);
 591   int len = strlen(read_buffer);
 592   wxBuffer[len] = 13;
 593   wxBuffer[len+1] = 10;
 594   wxBuffer[len+2] = 0;
 595 #if wxUSE_UNICODE
 596   pos += wxConvCurrent->MB2WC(tmp_buffer+pos, read_buffer, (size_t)-1);
 597 #else
 598   strcpy(tmp_buffer+pos, read_buffer);
 599   pos += strlen(read_buffer);
 600 #endif
 601   no_lines++;
 602       }
 603       delete[] read_buffer;
 604
 605       SetWindowText(GetHwnd(), tmp_buffer);
 606       SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 607       farfree(tmp_buffer);
 608
 609       // update the size limit if needed
 610       AdjustSpaceLimit();
 611
 612       return TRUE;
 613   }
 614   return FALSE;
 615 }
 616
 617 // If file is null, try saved file name first
 618 // Returns TRUE if succeeds.
 619 bool wxTextCtrl::SaveFile(const wxString& file)
 620 {
 621     wxString theFile(file);
 622
 623     if (theFile == _T(""))
 624         theFile = m_fileName;
 625
 626     if (theFile == _T(""))
 627         return FALSE;
 628
 629     m_fileName = theFile;
 630
 631     ofstream output(MBSTRINGCAST theFile.mb_str(wxConvFile));
 632     if (output.bad())
 633         return FALSE;
 634
 635     // This will only save 64K max
 636     unsigned long nbytes = SendMessage(GetHwnd(), WM_GETTEXTLENGTH, 0, 0);
 637     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 638     SendMessage(GetHwnd(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 639     char *pstr = tmp_buffer;
 640
 641     // Convert \r\n to just \n
 642     while (*pstr)
 643     {
 644       if (*pstr != '\r')
 645         output << *pstr;
 646       pstr++;
 647     }
 648
 649     farfree(tmp_buffer);
 650     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 651
 652     return TRUE;
 653 }
 654
 655 void wxTextCtrl::WriteText(const wxString& text)
 656 {
 657     // Covert \n to \r\n
 658     int len = text.Length();
 659     char *newtext = new char[(len*2)+1];
 660     int i = 0;
 661     int j = 0;
 662     while (i < len)
 663     {
 664       if (text[i] == '\n')
 665       {
 666         newtext[j] = '\r';
 667         j ++;
 668       }
 669       newtext[j] = text[i];
 670       i ++;
 671       j ++;
 672     }
 673     newtext[j] = 0;
 674     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)newtext);
 675     delete[] newtext;
 676
 677     AdjustSpaceLimit();
 678 }
 679
 680 void wxTextCtrl::AppendText(const wxString& text)
 681 {
 682     SetInsertionPointEnd();
 683     WriteText(text);
 684 }
 685
 686 void wxTextCtrl::Clear()
 687 {
 688     SetWindowText(GetHwnd(), _T(""));
 689 }
 690
 691 bool wxTextCtrl::IsModified() const
 692 {
 693     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 694 }
 695
 696 // Makes 'unmodified'
 697 void wxTextCtrl::DiscardEdits()
 698 {
 699   SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 700 }
 701
 702 /*
 703  * Some of the following functions are yet to be implemented
 704  *
 705  */
 706
 707 int wxTextCtrl::GetNumberOfLines() const
 708 {
 709     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 710 }
 711
 712 long wxTextCtrl::XYToPosition(long x, long y) const
 713 {
 714     HWND hWnd = GetHwnd();
 715
 716     // This gets the char index for the _beginning_ of this line
 717     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 718     return (long)(x + charIndex);
 719 }
 720
 721 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 722 {
 723     HWND hWnd = GetHwnd();
 724
 725     // This gets the line number containing the character
 726     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 727     // This gets the char index for the _beginning_ of this line
 728     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 729     // The X position must therefore be the different between pos and charIndex
 730     *x = (long)(pos - charIndex);
 731     *y = (long)lineNo;
 732 }
 733
 734 void wxTextCtrl::ShowPosition(long pos)
 735 {
 736     HWND hWnd = GetHwnd();
 737
 738     // To scroll to a position, we pass the number of lines and characters
 739     // to scroll *by*. This means that we need to:
 740     // (1) Find the line position of the current line.
 741     // (2) Find the line position of pos.
 742     // (3) Scroll by (pos - current).
 743     // For now, ignore the horizontal scrolling.
 744
 745     // Is this where scrolling is relative to - the line containing the caret?
 746     // Or is the first visible line??? Try first visible line.
 747 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 748
 749     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 750
 751     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 752
 753     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 754
 755     if (linesToScroll != 0)
 756       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 757 }
 758
 759 int wxTextCtrl::GetLineLength(long lineNo) const
 760 {
 761     long charIndex = XYToPosition(0, lineNo);
 762     HWND hWnd = GetHwnd();
 763     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 764     return len;
 765 }
 766
 767 wxString wxTextCtrl::GetLineText(long lineNo) const
 768 {
 769     HWND hWnd = GetHwnd();
 770     *(WORD *)wxBuffer = 512;
 771     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 772     wxBuffer[noChars] = 0;
 773   return wxString(wxBuffer);
 774 }
 775
 776 bool wxTextCtrl::CanCopy() const
 777 {
 778     // Can copy if there's a selection
 779     long from, to;
 780     GetSelection(& from, & to);
 781     return (from != to) ;
 782 }
 783
 784 bool wxTextCtrl::CanCut() const
 785 {
 786     // Can cut if there's a selection
 787     long from, to;
 788     GetSelection(& from, & to);
 789     return (from != to) ;
 790 }
 791
 792 bool wxTextCtrl::CanPaste() const
 793 {
 794 #if wxUSE_RICHEDIT
 795     if (m_isRich)
 796     {
 797         int dataFormat = 0; // 0 == any format
 798         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 799     }
 800 #endif
 801     if (!IsEditable())
 802         return FALSE;
 803
 804     // Standard edit control: check for straight text on clipboard
 805     bool isTextAvailable = FALSE;
 806     if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
 807     {
 808         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 809         ::CloseClipboard();
 810     }
 811     return isTextAvailable;
 812 }
 813
 814 // Undo/redo
 815 void wxTextCtrl::Undo()
 816 {
 817     if (CanUndo())
 818     {
 819         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 820     }
 821 }
 822
 823 void wxTextCtrl::Redo()
 824 {
 825     if (CanRedo())
 826     {
 827         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 828         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 829     }
 830 }
 831
 832 bool wxTextCtrl::CanUndo() const
 833 {
 834     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 835 }
 836
 837 bool wxTextCtrl::CanRedo() const
 838 {
 839     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 840 }
 841
 842 // If the return values from and to are the same, there is no
 843 // selection.
 844 void wxTextCtrl::GetSelection(long* from, long* to) const
 845 {
 846 #if wxUSE_RICHEDIT
 847     if (m_isRich)
 848     {
 849         CHARRANGE charRange;
 850         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 851
 852         *from = charRange.cpMin;
 853         *to = charRange.cpMax;
 854
 855         return;
 856     }
 857 #endif
 858     DWORD dwStart, dwEnd;
 859     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 860     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 861
 862     ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 863
 864     *from = dwStart;
 865     *to = dwEnd;
 866 }
 867
 868 bool wxTextCtrl::IsEditable() const
 869 {
 870     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 871
 872     return ((style & ES_READONLY) == 0);
 873 }
 874
 875 void wxTextCtrl::Command(wxCommandEvent & event)
 876 {
 877   SetValue (event.GetString());
 878   ProcessCommand (event);
 879 }
 880
 881 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 882 {
 883   // By default, load the first file into the text window.
 884   if (event.GetNumberOfFiles() > 0)
 885   {
 886     LoadFile(event.GetFiles()[0]);
 887   }
 888 }
 889
 890 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 891 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 892
 893 //=========================================================================
 894 // Called then the buffer is full (gcc 2.6.3)
 895 // or when "endl" is output (Borland 4.5)
 896 //=========================================================================
 897 // Class declaration using multiple inheritance doesn't work properly for
 898 // Borland. See note in textctrl.h.
 899 #ifndef NO_TEXT_WINDOW_STREAM
 900 int wxTextCtrl::overflow(int c)
 901 {
 902   // Make sure there is a holding area
 903   // this is not needed in <iostream> usage as it automagically allocates
 904   // it, but does someone want to emulate it for safety's sake?
 905 #if wxUSE_IOSTREAMH
 906   if ( allocate()==EOF )
 907   {
 908     wxLogError("Streambuf allocation failed");
 909     return EOF;
 910   }
 911 #endif
 912
 913   // Verify that there are no characters in get area
 914   if ( gptr() && gptr() < egptr() )
 915   {
 916      wxError("Who's trespassing my get area?","Internal error");
 917      return EOF;
 918   }
 919
 920   // Reset get area
 921   setg(0,0,0);
 922
 923   // Make sure there is a put area
 924   if ( ! pptr() )
 925   {
 926 /* This doesn't seem to be fatal so comment out error message */
 927 //    wxError("Put area not opened","Internal error");
 928
 929 #if wxUSE_IOSTREAMH
 930           setp( base(), base() );
 931 #else
 932           setp( pbase(), pbase() );
 933 #endif
 934   }
 935
 936   // Determine how many characters have been inserted but no consumed
 937   int plen = pptr() - pbase();
 938
 939   // Now Jerry relies on the fact that the buffer is at least 2 chars
 940   // long, but the holding area "may be as small as 1" ???
 941   // And we need an additional \0, so let's keep this inefficient but
 942   // safe copy.
 943
 944   // If c!=EOF, it is a character that must also be comsumed
 945   int xtra = c==EOF? 0 : 1;
 946
 947   // Write temporary C-string to wxTextWindow
 948   {
 949   char *txt = new char[plen+xtra+1];
 950   memcpy(txt, pbase(), plen);
 951   txt[plen] = (char)c;     // append c
 952   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 953     // If the put area already contained \0, output will be truncated there
 954   AppendText(txt);
 955     delete[] txt;
 956   }
 957
 958   // Reset put area
 959   setp(pbase(), epptr());
 960
 961 #if defined(__WATCOMC__)
 962   return __NOT_EOF;
 963 #elif defined(zapeof)     // HP-UX (all cfront based?)
 964   return zapeof(c);
 965 #else
 966   return c!=EOF ? c : 0;  // this should make everybody happy
 967 #endif
 968
 969 /* OLD CODE
 970   int len = pptr() - pbase();
 971   char *txt = new char[len+1];
 972   strncpy(txt, pbase(), len);
 973   txt[len] = '\0';
 974   (*this) << txt;
 975   setp(pbase(), epptr());
 976   delete[] txt;
 977   return EOF;
 978 */
 979 }
 980
 981 //=========================================================================
 982 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 983 //=========================================================================
 984 int wxTextCtrl::sync()
 985 {
 986   // Verify that there are no characters in get area
 987   if ( gptr() && gptr() < egptr() )
 988   {
 989      wxError("Who's trespassing my get area?","Internal error");
 990      return EOF;
 991   }
 992
 993   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 994
 995   return 0;
 996 /* OLD CODE
 997   int len = pptr() - pbase();
 998   char *txt = new char[len+1];
 999   strncpy(txt, pbase(), len);
1000   txt[len] = '\0';
1001   (*this) << txt;
1002   setp(pbase(), epptr());
1003   delete[] txt;
1004   return 0;
1005 */
1006 }
1007
1008 //=========================================================================
1009 // Should not be called by a "ostream". Used by a "istream"
1010 //=========================================================================
1011 int wxTextCtrl::underflow()
1012 {
1013   return EOF;
1014 }
1015 #endif
1016
1017 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
1018 {
1019     AppendText(s);
1020     return *this;
1021 }
1022
1023 wxTextCtrl& wxTextCtrl::operator<<(float f)
1024 {
1025     wxString str;
1026     str.Printf(_T("%.2f"), f);
1027     AppendText(str);
1028     return *this;
1029 }
1030
1031 wxTextCtrl& wxTextCtrl::operator<<(double d)
1032 {
1033     wxString str;
1034     str.Printf(_T("%.2f"), d);
1035     AppendText(str);
1036     return *this;
1037 }
1038
1039 wxTextCtrl& wxTextCtrl::operator<<(int i)
1040 {
1041     wxString str;
1042     str.Printf(_T("%d"), i);
1043     AppendText(str);
1044     return *this;
1045 }
1046
1047 wxTextCtrl& wxTextCtrl::operator<<(long i)
1048 {
1049     wxString str;
1050     str.Printf(_T("%ld"), i);
1051     AppendText(str);
1052     return *this;
1053 }
1054
1055 wxTextCtrl& wxTextCtrl::operator<<(const char c)
1056 {
1057     char buf[2];
1058
1059     buf[0] = c;
1060     buf[1] = 0;
1061     AppendText(buf);
1062     return *this;
1063 }
1064
1065 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1066       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1067 {
1068 #if wxUSE_CTL3D
1069   if ( m_useCtl3D )
1070   {
1071     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1072     return (WXHBRUSH) hbrush;
1073   }
1074 #endif
1075
1076   if (GetParent()->GetTransparentBackground())
1077     SetBkMode((HDC) pDC, TRANSPARENT);
1078   else
1079     SetBkMode((HDC) pDC, OPAQUE);
1080
1081   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1082   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1083
1084   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1085
1086   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1087   // has a zero usage count.
1088   // NOT NOW - will be cleaned up at end of app.
1089 //  backgroundBrush->RealizeResource();
1090   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1091 }
1092
1093 void wxTextCtrl::OnChar(wxKeyEvent& event)
1094 {
1095     switch ( event.KeyCode() )
1096     {
1097         case WXK_RETURN:
1098             if ( !(m_windowStyle & wxTE_MULTILINE) )
1099             {
1100                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1101                 event.SetEventObject( this );
1102                 if ( GetEventHandler()->ProcessEvent(event) )
1103                     return;
1104             }
1105             //else: multiline controls need Enter for themselves
1106
1107             break;
1108
1109         case WXK_TAB:
1110             // always produce navigation event - even if we process TAB
1111             // ourselves the fact that we got here means that the user code
1112             // decided to skip processing of this TAB - probably to let it
1113             // do its default job.
1114             //
1115             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1116             //     handled by Windows
1117             {
1118                 wxNavigationKeyEvent eventNav;
1119                 eventNav.SetDirection(!event.ShiftDown());
1120                 eventNav.SetWindowChange(FALSE);
1121                 eventNav.SetEventObject(this);
1122
1123                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1124                     return;
1125             }
1126             break;
1127
1128         default:
1129             event.Skip();
1130             return;
1131     }
1132
1133     // don't just call event.Skip() because this will cause TABs and ENTERs
1134     // be passed upwards and we don't always want this - instead process it
1135     // right here
1136
1137     // FIXME
1138     event.Skip();
1139 }
1140
1141 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1142 {
1143     switch (param)
1144     {
1145         case EN_SETFOCUS:
1146         case EN_KILLFOCUS:
1147             {
1148                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1149                         : wxEVT_SET_FOCUS,
1150                         m_windowId);
1151                 event.SetEventObject( this );
1152                 GetEventHandler()->ProcessEvent(event);
1153             }
1154             break;
1155
1156         case EN_CHANGE:
1157             {
1158                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1159                 wxString val(GetValue());
1160                 if ( !val.IsNull() )
1161                     event.m_commandString = WXSTRINGCAST val;
1162                 event.SetEventObject( this );
1163                 ProcessCommand(event);
1164             }
1165             break;
1166
1167         case EN_ERRSPACE:
1168             // the text size limit has been hit - increase it
1169             AdjustSpaceLimit();
1170             break;
1171
1172             // the other notification messages are not processed
1173         case EN_UPDATE:
1174         case EN_MAXTEXT:
1175         case EN_HSCROLL:
1176         case EN_VSCROLL:
1177         default:
1178             return FALSE;
1179     }
1180
1181     // processed
1182     return TRUE;
1183 }
1184
1185 void wxTextCtrl::AdjustSpaceLimit()
1186 {
1187 #ifndef __WIN16__
1188     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1189     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1190     if ( len > limit )
1191     {
1192         limit = len + 0x8000;    // 32Kb
1193
1194 #if wxUSE_RICHEDIT
1195         if ( m_isRich || limit > 0xffff )
1196 #else
1197         if ( limit > 0xffff )
1198 #endif
1199             ::SendMessage(GetHwnd(), EM_LIMITTEXT, 0, limit);
1200         else
1201             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1202     }
1203 #endif
1204 }
1205
1206 // For Rich Edit controls. Do we need it?
1207 #if 0
1208 #if wxUSE_RICHEDIT
1209 bool wxTextCtrl::MSWOnNotify(WXWPARAM wParam, WXLPARAM lParam)
1210 {
1211   wxCommandEvent event(0, m_windowId);
1212   int eventType = 0;
1213   NMHDR *hdr1 = (NMHDR *) lParam;
1214   switch ( hdr1->code )
1215   {
1216     // Insert case code here
1217     default :
1218       return wxControl::MSWOnNotify(wParam, lParam);
1219       break;
1220   }
1221
1222   event.SetEventObject( this );
1223   event.SetEventType(eventType);
1224
1225   if ( !GetEventHandler()->ProcessEvent(event) )
1226     return FALSE;
1227
1228     return TRUE;
1229 }
1230 #endif
1231 #endif
1232
1233 void wxTextCtrl::OnCut(wxCommandEvent& event)
1234 {
1235     Cut();
1236 }
1237
1238 void wxTextCtrl::OnCopy(wxCommandEvent& event)
1239 {
1240     Copy();
1241 }
1242
1243 void wxTextCtrl::OnPaste(wxCommandEvent& event)
1244 {
1245     Paste();
1246 }
1247
1248 void wxTextCtrl::OnUndo(wxCommandEvent& event)
1249 {
1250     Undo();
1251 }
1252
1253 void wxTextCtrl::OnRedo(wxCommandEvent& event)
1254 {
1255     Redo();
1256 }
1257
1258 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1259 {
1260     event.Enable( CanCut() );
1261 }
1262
1263 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1264 {
1265     event.Enable( CanCopy() );
1266 }
1267
1268 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1269 {
1270     event.Enable( CanPaste() );
1271 }
1272
1273 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1274 {
1275     event.Enable( CanUndo() );
1276 }
1277
1278 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1279 {
1280     event.Enable( CanRedo() );
1281 }
1282
1283 bool wxTextCtrl::AcceptsFocus() const
1284 {
1285     // we don't want focus if we can't be edited
1286     return IsEditable() && wxControl::AcceptsFocus();
1287 }