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