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 #endif
  27
  28 #if wxUSE_CLIPBOARD
  29 #include "wx/app.h"
  30 #include "wx/clipbrd.h"
  31 #endif
  32
  33 #include "wx/msw/private.h"
  34
  35 #include <windows.h>
  36 #include <stdlib.h>
  37
  38 #if wxUSE_IOSTREAMH
  39 #include <fstream.h>
  40 #else
  41 #include <fstream>
  42 #  ifdef _MSC_VER
  43       using namespace std;
  44 #  endif
  45 #endif
  46
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #if defined(__BORLANDC__) && !defined(__WIN32__)
  50 #include <alloc.h>
  51 #else
  52 #ifndef __GNUWIN32__
  53 #include <malloc.h>
  54 #endif
  55 #define farmalloc malloc
  56 #define farfree free
  57 #endif
  58 #include <windowsx.h>
  59
  60 #include <string.h>
  61
  62 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  63 #include <richedit.h>
  64 #endif
  65
  66 #if !USE_SHARED_LIBRARY
  67 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  68
  69 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  70         EVT_CHAR(wxTextCtrl::OnChar)
  71         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  72         EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  73 END_EVENT_TABLE()
  74
  75 #endif
  76
  77 // Text item
  78 wxTextCtrl::wxTextCtrl(void)
  79 #ifndef NO_TEXT_WINDOW_STREAM
  80  :streambuf()
  81 #endif
  82 {
  83   m_fileName = "";
  84   m_isRich = FALSE;
  85 }
  86
  87 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  88                    const wxString& value,
  89            const wxPoint& pos,
  90            const wxSize& size, long style,
  91            const wxValidator& validator,
  92            const wxString& name)
  93 {
  94   m_fileName = "";
  95   SetName(name);
  96   SetValidator(validator);
  97   if (parent) parent->AddChild(this);
  98
  99   m_windowStyle = style;
 100
 101   // Should this be taken from the system colours?
 102 //  SetBackgroundColour(wxColour(255, 255, 255));
 103
 104   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 105
 106   SetForegroundColour(parent->GetForegroundColour()) ;
 107
 108   if ( id == -1 )
 109         m_windowId = (int)NewControlId();
 110   else
 111         m_windowId = id;
 112
 113   int x = pos.x;
 114   int y = pos.y;
 115   int width = size.x;
 116   int height = size.y;
 117
 118 #ifdef __WIN32__
 119   WXHGLOBAL m_globalHandle = 0;
 120 #else
 121   // Obscure method from the MS Developer's Network Disk for
 122   // using global memory instead of the local heap, which
 123   // runs out far too soon. Solves the problem with
 124   // failing to appear.
 125
 126   // Doesn't seem to work for Win95, so removing.
 127   m_globalHandle=0;
 128 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 129 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 130 //                         256L);
 131 #endif
 132   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 133   if (m_windowStyle & wxTE_MULTILINE)
 134         msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 135   else
 136     msStyle |= ES_AUTOHSCROLL ;
 137
 138   if (m_windowStyle & wxTE_READONLY)
 139     msStyle |= ES_READONLY;
 140
 141   if (m_windowStyle & wxHSCROLL)
 142     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 143   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 144     msStyle |= ES_PASSWORD;
 145
 146   char *windowClass = "EDIT";
 147 #if defined(__WIN95__)
 148   if ( m_windowStyle & wxTE_MULTILINE )
 149 #else
 150   if ( FALSE )
 151 #endif
 152   {
 153       msStyle |= ES_AUTOVSCROLL;
 154           m_isRich = TRUE;
 155           windowClass = "RichEdit" ;
 156   }
 157   else
 158           m_isRich = FALSE;
 159
 160   bool want3D;
 161   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 162
 163   // If we're in Win95, and we want a simple 2D border,
 164   // then make it an EDIT control instead.
 165 #if defined(__WIN95__)
 166   if (m_windowStyle & wxSIMPLE_BORDER)
 167   {
 168     windowClass = "EDIT";
 169         m_isRich = FALSE;
 170   }
 171 #endif
 172
 173   // Even with extended styles, need to combine with WS_BORDER
 174   // for them to look right.
 175   if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
 176        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 177     msStyle |= WS_BORDER;
 178
 179   HWND edit = CreateWindowEx(exStyle, windowClass, NULL,
 180                         msStyle,
 181                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 182                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 183
 184 #if CTL3D
 185   if ( want3D )
 186   {
 187     Ctl3dSubclassCtl(edit);
 188         m_useCtl3D = TRUE;
 189   }
 190 #endif
 191
 192   m_hWnd = (WXHWND)edit;
 193
 194 #if defined(__WIN95__)
 195   if (m_isRich)
 196   {
 197         // Have to enable events
 198         ::SendMessage(edit, EM_SETEVENTMASK, 0, ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 199   }
 200 #endif
 201
 202   SubclassWin(GetHWND());
 203
 204   if ( parent->GetFont() && parent->GetFont()->Ok() )
 205   {
 206         SetFont(* parent->GetFont());
 207   }
 208   else
 209   {
 210         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 211   }
 212
 213   SetSize(x, y, width, height);
 214
 215   // Causes a crash for Symantec C++ and WIN32 for some reason
 216 #if !(defined(__SC__) && defined(__WIN32__))
 217   if (value != "")
 218     SetWindowText(edit, (const char *)value);
 219 #endif
 220
 221   return TRUE;
 222 }
 223
 224 // Make sure the window style (etc.) reflects the HWND style (roughly)
 225 void wxTextCtrl::AdoptAttributesFromHWND(void)
 226 {
 227         wxWindow::AdoptAttributesFromHWND();
 228
 229         HWND hWnd = (HWND) GetHWND();
 230         long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 231
 232     char buf[256];
 233
 234 #ifndef __WIN32__
 235         GetClassName((HWND) hWnd, buf, 256);
 236 #else
 237 #ifdef UNICODE
 238         GetClassNameW((HWND) hWnd, buf, 256);
 239 #else
 240         GetClassNameA((HWND) hWnd, buf, 256);
 241 #endif
 242 #endif
 243
 244         wxString str(buf);
 245         str.UpperCase();
 246
 247         if (str == "EDIT")
 248                 m_isRich = FALSE;
 249         else
 250                 m_isRich = TRUE;
 251
 252         if (style & ES_MULTILINE)
 253                 m_windowStyle |= wxTE_MULTILINE;
 254         if (style & ES_PASSWORD)
 255                 m_windowStyle |= wxTE_PASSWORD;
 256         if (style & ES_READONLY)
 257                 m_windowStyle |= wxTE_READONLY;
 258         if (style & ES_WANTRETURN)
 259                 m_windowStyle |= wxTE_PROCESS_ENTER;
 260 }
 261
 262 void wxTextCtrl::SetupColours(void)
 263 {
 264   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 265   SetForegroundColour(GetParent()->GetForegroundColour());
 266 }
 267
 268 wxString wxTextCtrl::GetValue(void) const
 269 {
 270     int length = GetWindowTextLength((HWND) GetHWND());
 271     char *s = new char[length+1];
 272     GetWindowText((HWND) GetHWND(), s, length+1);
 273     wxString str(s);
 274     delete[] s;
 275         return str;
 276 }
 277
 278 void wxTextCtrl::SetValue(const wxString& value)
 279 {
 280   // If newlines are denoted by just 10, must stick 13 in front.
 281   int singletons = 0;
 282   int len = value.Length();
 283   int i;
 284   for (i = 0; i < len; i ++)
 285   {
 286     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 287       singletons ++;
 288   }
 289   if (singletons > 0)
 290   {
 291     char *tmp = new char[len + singletons + 1];
 292     int j = 0;
 293     for (i = 0; i < len; i ++)
 294     {
 295       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 296       {
 297         tmp[j] = 13;
 298         j ++;
 299       }
 300       tmp[j] = value[i];
 301       j ++;
 302     }
 303     tmp[j] = 0;
 304     SetWindowText((HWND) GetHWND(), tmp);
 305     delete[] tmp;
 306   }
 307   else
 308     SetWindowText((HWND) GetHWND(), (const char *)value);
 309 }
 310
 311 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 312 {
 313   int currentX, currentY;
 314   GetPosition(&currentX, &currentY);
 315   int x1 = x;
 316   int y1 = y;
 317   int w1 = width;
 318   int h1 = height;
 319
 320   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 321     x1 = currentX;
 322   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 323     y1 = currentY;
 324
 325   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 326
 327   int cx; // button font dimensions
 328   int cy;
 329
 330   wxGetCharSize(GetHWND(), &cx, &cy,GetFont());
 331
 332   int control_width, control_height, control_x, control_y;
 333
 334   // If we're prepared to use the existing size, then...
 335   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 336   {
 337     GetSize(&w1, &h1);
 338   }
 339
 340   // Deal with default size (using -1 values)
 341   if (w1<=0)
 342     w1 = DEFAULT_ITEM_WIDTH;
 343
 344   control_x = x1;
 345   control_y = y1;
 346   control_width = w1;
 347   control_height = h1;
 348
 349   // Calculations may have made text size too small
 350   if (control_height <= 0)
 351     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 352
 353   if (control_width <= 0)
 354     control_width = DEFAULT_ITEM_WIDTH;
 355
 356   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 357                               (int)control_width, (int)control_height, TRUE);
 358 }
 359
 360 // Clipboard operations
 361 void wxTextCtrl::Copy(void)
 362 {
 363   HWND hWnd = (HWND) GetHWND();
 364   SendMessage(hWnd, WM_COPY, 0, 0L);
 365 }
 366
 367 void wxTextCtrl::Cut(void)
 368 {
 369   HWND hWnd = (HWND) GetHWND();
 370   SendMessage(hWnd, WM_CUT, 0, 0L);
 371 }
 372
 373 void wxTextCtrl::Paste(void)
 374 {
 375   HWND hWnd = (HWND) GetHWND();
 376   SendMessage(hWnd, WM_PASTE, 0, 0L);
 377 }
 378
 379 void wxTextCtrl::SetEditable(bool editable)
 380 {
 381   HWND hWnd = (HWND) GetHWND();
 382   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 383 }
 384
 385 void wxTextCtrl::SetInsertionPoint(long pos)
 386 {
 387   HWND hWnd = (HWND) GetHWND();
 388 #ifdef __WIN32__
 389 #if defined(__WIN95__)
 390   if ( m_isRich)
 391   {
 392     CHARRANGE range;
 393     range.cpMin = pos;
 394     range.cpMax = pos;
 395     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 396     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 397   }
 398   else
 399 #endif
 400   {
 401     SendMessage(hWnd, EM_SETSEL, pos, pos);
 402     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 403   }
 404 #else
 405   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 406 #endif
 407   char *nothing = "";
 408   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 409 }
 410
 411 void wxTextCtrl::SetInsertionPointEnd(void)
 412 {
 413   long pos = GetLastPosition();
 414   SetInsertionPoint(pos);
 415 }
 416
 417 long wxTextCtrl::GetInsertionPoint(void) const
 418 {
 419 #if defined(__WIN95__)
 420   if (m_isRich)
 421   {
 422     CHARRANGE range;
 423     range.cpMin = 0;
 424     range.cpMax = 0;
 425     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 426     return range.cpMin;
 427   }
 428 #endif
 429
 430   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 431   return Pos&0xFFFF;
 432 }
 433
 434 long wxTextCtrl::GetLastPosition(void) const
 435 {
 436     HWND hWnd = (HWND) GetHWND();
 437
 438     // Will always return a number > 0 (according to docs)
 439     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 440
 441     // This gets the char index for the _beginning_ of the last line
 442     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 443
 444     // Get number of characters in the last line. We'll add this to the character
 445     // index for the last line, 1st position.
 446     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 447
 448     return (long)(charIndex + lineLength);
 449 }
 450
 451 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 452 {
 453     HWND hWnd = (HWND) GetHWND();
 454     long fromChar = from;
 455     long toChar = to;
 456
 457     // Set selection and remove it
 458 #ifdef __WIN32__
 459     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 460 #else
 461     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 462 #endif
 463     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 464
 465     // Now replace with 'value', by pasting.
 466     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 467
 468     // Paste into edit control
 469     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 470 }
 471
 472 void wxTextCtrl::Remove(long from, long to)
 473 {
 474     HWND hWnd = (HWND) GetHWND();
 475     long fromChar = from;
 476     long toChar = to;
 477
 478     // Cut all selected text
 479 #ifdef __WIN32__
 480     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 481 #else
 482     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 483 #endif
 484     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 485 }
 486
 487 void wxTextCtrl::SetSelection(long from, long to)
 488 {
 489     HWND hWnd = (HWND) GetHWND();
 490     long fromChar = from;
 491     long toChar = to;
 492     // if from and to are both -1, it means
 493     // (in wxWindows) that all text should be selected.
 494     // This translates into Windows convention
 495     if ((from == -1) && (to == -1))
 496     {
 497       fromChar = 0;
 498       toChar = -1;
 499     }
 500
 501 #ifdef __WIN32__
 502     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 503     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 504 #else
 505     // WPARAM is 0: selection is scrolled into view
 506     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 507 #endif
 508 }
 509
 510 bool wxTextCtrl::LoadFile(const wxString& file)
 511 {
 512   if (!FileExists(WXSTRINGCAST file))
 513     return FALSE;
 514
 515   m_fileName = file;
 516
 517   Clear();
 518
 519 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 520   ifstream input(WXSTRINGCAST file, ios::in);
 521
 522   if (!input.bad())
 523   {
 524       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 525       // line by line into the control. Apart from being very slow this
 526       // was limited to 32K of text by the external interface presenting
 527       // positions as signed shorts. Now load in one chunk...
 528       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 529
 530       struct stat stat_buf;
 531       if (stat(file, &stat_buf) < 0)
 532         return FALSE;
 533 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 534       // This may need to be a bigger buffer than the file size suggests,
 535       // if it's a UNIX file. Give it an extra 1000 just in case.
 536       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 537       long no_lines = 0;
 538       long pos = 0;
 539       while (!input.eof() && input.peek() != EOF)
 540       {
 541         input.getline(wxBuffer, 500);
 542         int len = strlen(wxBuffer);
 543         wxBuffer[len] = 13;
 544         wxBuffer[len+1] = 10;
 545         wxBuffer[len+2] = 0;
 546         strcpy(tmp_buffer+pos, wxBuffer);
 547         pos += strlen(wxBuffer);
 548         no_lines++;
 549       }
 550
 551 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 552       SetWindowText((HWND) GetHWND(), tmp_buffer);
 553       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 554       farfree(tmp_buffer);
 555
 556       return TRUE;
 557   }
 558   return FALSE;
 559 }
 560
 561 // If file is null, try saved file name first
 562 // Returns TRUE if succeeds.
 563 bool wxTextCtrl::SaveFile(const wxString& file)
 564 {
 565   wxString theFile(file);
 566   if (theFile == "")
 567     theFile = m_fileName;
 568   if (theFile == "")
 569     return FALSE;
 570   m_fileName = theFile;
 571
 572   ofstream output((char*) (const char*) theFile);
 573   if (output.bad())
 574         return FALSE;
 575
 576     // This will only save 64K max
 577     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 578     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 579     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 580     char *pstr = tmp_buffer;
 581
 582         // Convert \r\n to just \n
 583         while (*pstr)
 584         {
 585                 if (*pstr != '\r')
 586                         output << *pstr;
 587                 pstr++;
 588         }
 589
 590     farfree(tmp_buffer);
 591     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 592
 593     return TRUE;
 594 }
 595
 596 void wxTextCtrl::WriteText(const wxString& text)
 597 {
 598     // Covert \n to \r\n
 599     int len = text.Length();
 600     char *newtext = new char[(len*2)+1];
 601     int i = 0;
 602     int j = 0;
 603     while (i < len)
 604     {
 605       if (text[i] == '\n')
 606       {
 607         newtext[j] = '\r';
 608         j ++;
 609       }
 610       newtext[j] = text[i];
 611       i ++;
 612       j ++;
 613     }
 614     newtext[j] = 0;
 615     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 616     delete[] newtext;
 617 }
 618
 619 void wxTextCtrl::Clear(void)
 620 {
 621 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 622     SetWindowText((HWND) GetHWND(), "");
 623 }
 624
 625 bool wxTextCtrl::IsModified(void) const
 626 {
 627     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 628 }
 629
 630 // Makes 'unmodified'
 631 void wxTextCtrl::DiscardEdits(void)
 632 {
 633   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 634 }
 635
 636 /*
 637  * Some of the following functions are yet to be implemented
 638  *
 639  */
 640
 641 int wxTextCtrl::GetNumberOfLines(void) const
 642 {
 643     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 644 }
 645
 646 long wxTextCtrl::XYToPosition(long x, long y) const
 647 {
 648     HWND hWnd = (HWND) GetHWND();
 649
 650     // This gets the char index for the _beginning_ of this line
 651     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 652     return (long)(x + charIndex);
 653 }
 654
 655 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 656 {
 657     HWND hWnd = (HWND) GetHWND();
 658
 659     // This gets the line number containing the character
 660     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 661     // This gets the char index for the _beginning_ of this line
 662     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 663     // The X position must therefore be the different between pos and charIndex
 664     *x = (long)(pos - charIndex);
 665     *y = (long)lineNo;
 666 }
 667
 668 void wxTextCtrl::ShowPosition(long pos)
 669 {
 670     HWND hWnd = (HWND) GetHWND();
 671
 672     // To scroll to a position, we pass the number of lines and characters
 673     // to scroll *by*. This means that we need to:
 674     // (1) Find the line position of the current line.
 675     // (2) Find the line position of pos.
 676     // (3) Scroll by (pos - current).
 677     // For now, ignore the horizontal scrolling.
 678
 679     // Is this where scrolling is relative to - the line containing the caret?
 680     // Or is the first visible line??? Try first visible line.
 681 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 682
 683     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 684
 685     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 686
 687     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 688
 689 /*
 690     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 691       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 692 */
 693
 694     if (linesToScroll != 0)
 695       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 696 }
 697
 698 int wxTextCtrl::GetLineLength(long lineNo) const
 699 {
 700     long charIndex = XYToPosition(0, lineNo);
 701     HWND hWnd = (HWND) GetHWND();
 702     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 703     return len;
 704 }
 705
 706 wxString wxTextCtrl::GetLineText(long lineNo) const
 707 {
 708     HWND hWnd = (HWND) GetHWND();
 709     *(WORD *)wxBuffer = 512;
 710     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 711     wxBuffer[noChars] = 0;
 712         return wxString(wxBuffer);
 713 }
 714
 715 /*
 716  * Text item
 717  */
 718
 719 void wxTextCtrl::Command(wxCommandEvent & event)
 720 {
 721   SetValue (event.GetString());
 722   ProcessCommand (event);
 723 }
 724
 725 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 726 {
 727   // By default, load the first file into the text window.
 728   if (event.GetNumberOfFiles() > 0)
 729   {
 730     LoadFile(event.GetFiles()[0]);
 731   }
 732 }
 733
 734 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 735 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 736
 737 //=========================================================================
 738 // Called then the buffer is full (gcc 2.6.3)
 739 // or when "endl" is output (Borland 4.5)
 740 //=========================================================================
 741 // Class declaration using multiple inheritance doesn't work properly for
 742 // Borland. See note in wb_text.h.
 743 #ifndef NO_TEXT_WINDOW_STREAM
 744 int wxTextCtrl::overflow(int c)
 745 {
 746   // Make sure there is a holding area
 747   if ( allocate()==EOF )
 748   {
 749     wxError("Streambuf allocation failed","Internal error");
 750     return EOF;
 751   }
 752
 753   // Verify that there are no characters in get area
 754   if ( gptr() && gptr() < egptr() )
 755   {
 756      wxError("Who's trespassing my get area?","Internal error");
 757      return EOF;
 758   }
 759
 760   // Reset get area
 761   setg(0,0,0);
 762
 763   // Make sure there is a put area
 764   if ( ! pptr() )
 765   {
 766 /* This doesn't seem to be fatal so comment out error message */
 767 //    wxError("Put area not opened","Internal error");
 768     setp( base(), base() );
 769   }
 770
 771   // Determine how many characters have been inserted but no consumed
 772   int plen = pptr() - pbase();
 773
 774   // Now Jerry relies on the fact that the buffer is at least 2 chars
 775   // long, but the holding area "may be as small as 1" ???
 776   // And we need an additional \0, so let's keep this inefficient but
 777   // safe copy.
 778
 779   // If c!=EOF, it is a character that must also be comsumed
 780   int xtra = c==EOF? 0 : 1;
 781
 782   // Write temporary C-string to wxTextWindow
 783   {
 784   char *txt = new char[plen+xtra+1];
 785   memcpy(txt, pbase(), plen);
 786   txt[plen] = (char)c;     // append c
 787   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 788     // If the put area already contained \0, output will be truncated there
 789   WriteText(txt);
 790     delete[] txt;
 791   }
 792
 793   // Reset put area
 794   setp(pbase(), epptr());
 795
 796 #if defined(__WATCOMC__)
 797   return __NOT_EOF;
 798 #elif defined(zapeof)     // HP-UX (all cfront based?)
 799   return zapeof(c);
 800 #else
 801   return c!=EOF ? c : 0;  // this should make everybody happy
 802 #endif
 803
 804 /* OLD CODE
 805   int len = pptr() - pbase();
 806   char *txt = new char[len+1];
 807   strncpy(txt, pbase(), len);
 808   txt[len] = '\0';
 809   (*this) << txt;
 810   setp(pbase(), epptr());
 811   delete[] txt;
 812   return EOF;
 813 */
 814 }
 815
 816 //=========================================================================
 817 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 818 //=========================================================================
 819 int wxTextCtrl::sync(void)
 820 {
 821   // Verify that there are no characters in get area
 822   if ( gptr() && gptr() < egptr() )
 823   {
 824      wxError("Who's trespassing my get area?","Internal error");
 825      return EOF;
 826   }
 827
 828   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 829
 830   return 0;
 831 /* OLD CODE
 832   int len = pptr() - pbase();
 833   char *txt = new char[len+1];
 834   strncpy(txt, pbase(), len);
 835   txt[len] = '\0';
 836   (*this) << txt;
 837   setp(pbase(), epptr());
 838   delete[] txt;
 839   return 0;
 840 */
 841 }
 842
 843 //=========================================================================
 844 // Should not be called by a "ostream". Used by a "istream"
 845 //=========================================================================
 846 int wxTextCtrl::underflow(void)
 847 {
 848   return EOF;
 849 }
 850 #endif
 851
 852 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 853 {
 854   WriteText(s);
 855   return *this;
 856 }
 857
 858 wxTextCtrl& wxTextCtrl::operator<<(float f)
 859 {
 860     wxString str;
 861     str.Printf("%.2f", f);
 862     WriteText(str);
 863     return *this;
 864 }
 865
 866 wxTextCtrl& wxTextCtrl::operator<<(double d)
 867 {
 868     wxString str;
 869     str.Printf("%.2f", d);
 870     WriteText(str);
 871     return *this;
 872 }
 873
 874 wxTextCtrl& wxTextCtrl::operator<<(int i)
 875 {
 876     wxString str;
 877     str.Printf("%d", i);
 878     WriteText(str);
 879     return *this;
 880 }
 881
 882 wxTextCtrl& wxTextCtrl::operator<<(long i)
 883 {
 884     wxString str;
 885     str.Printf("%ld", i);
 886     WriteText(str);
 887     return *this;
 888 }
 889
 890 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 891 {
 892     char buf[2];
 893
 894     buf[0] = c;
 895     buf[1] = 0;
 896     WriteText(buf);
 897     return *this;
 898 }
 899
 900 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 901                         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 902 {
 903 #if CTL3D
 904   if ( m_useCtl3D )
 905   {
 906     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 907     return (WXHBRUSH) hbrush;
 908   }
 909 #endif
 910
 911   if (GetParent()->GetTransparentBackground())
 912     SetBkMode((HDC) pDC, TRANSPARENT);
 913   else
 914     SetBkMode((HDC) pDC, OPAQUE);
 915
 916   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 917   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 918
 919   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 920
 921   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 922   // has a zero usage count.
 923   // NOT NOW - will be cleaned up at end of app.
 924 //  backgroundBrush->RealizeResource();
 925   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 926 }
 927
 928 void wxTextCtrl::OnChar(wxKeyEvent& event)
 929 {
 930         if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 931         {
 932                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 933                 event.SetEventObject( this );
 934                 if ( GetEventHandler()->ProcessEvent(event) )
 935       return;
 936         }
 937   else if ( event.KeyCode() == WXK_TAB ) {
 938     wxNavigationKeyEvent event;
 939     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 940     event.SetWindowChange(FALSE);
 941     event.SetEventObject(this);
 942
 943     if ( GetEventHandler()->ProcessEvent(event) )
 944       return;
 945   }
 946
 947   event.Skip();
 948 }
 949
 950 long wxTextCtrl::MSWGetDlgCode()
 951 {
 952   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 953   if ( m_windowStyle & wxPROCESS_ENTER )
 954     lRc |= DLGC_WANTMESSAGE;
 955   else if ( m_windowStyle & wxTE_MULTILINE )
 956     lRc |= DLGC_WANTMESSAGE;
 957
 958   return lRc;
 959 }
 960
 961 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 962 {
 963     if ( m_windowStyle & wxTE_MULTILINE )
 964     {
 965         // No flicker - only problem is we probably can't change the background
 966         Default();
 967 /*
 968         RECT rect;
 969         ::GetClientRect((HWND) GetHWND(), &rect);
 970
 971         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 972         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 973
 974         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 975         ::DeleteObject(hBrush);
 976         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 977 */
 978     }
 979 //        wxWindow::OnEraseBackground(event);
 980 }
 981
 982 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 983 {
 984 /*
 985   // Debugging
 986   wxDebugMsg("Edit control %d: ", (int)id);
 987   switch (param)
 988   {
 989     case EN_SETFOCUS:
 990       wxDebugMsg("EN_SETFOCUS\n");
 991       break;
 992     case EN_KILLFOCUS:
 993       wxDebugMsg("EN_KILLFOCUS\n");
 994       break;
 995     case EN_CHANGE:
 996       wxDebugMsg("EN_CHANGE\n");
 997       break;
 998     case EN_UPDATE:
 999       wxDebugMsg("EN_UPDATE\n");
1000       break;
1001     case EN_ERRSPACE:
1002       wxDebugMsg("EN_ERRSPACE\n");
1003       break;
1004     case EN_MAXTEXT:
1005       wxDebugMsg("EN_MAXTEXT\n");
1006       break;
1007     case EN_HSCROLL:
1008       wxDebugMsg("EN_HSCROLL\n");
1009       break;
1010     case EN_VSCROLL:
1011       wxDebugMsg("EN_VSCROLL\n");
1012       break;
1013     default:
1014       wxDebugMsg("Unknown EDIT notification\n");
1015       break;
1016   }
1017 */
1018   switch (param)
1019   {
1020     case EN_SETFOCUS:
1021     case EN_KILLFOCUS:
1022       {
1023         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1024                                                  : wxEVT_SET_FOCUS,
1025                            m_windowId);
1026         event.SetEventObject( this );
1027         ProcessEvent(event);
1028       }
1029       break;
1030
1031     case EN_CHANGE:
1032       {
1033         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1034         wxString val(GetValue());
1035         if ( !val.IsNull() )
1036           event.m_commandString = WXSTRINGCAST val;
1037         event.SetEventObject( this );
1038         ProcessCommand(event);
1039       }
1040       break;
1041
1042     // the other notification messages are not processed
1043     case EN_UPDATE:
1044     case EN_ERRSPACE:
1045     case EN_MAXTEXT:
1046     case EN_HSCROLL:
1047     case EN_VSCROLL:
1048     default:
1049       return FALSE;
1050   }
1051
1052   // processed
1053   return TRUE;
1054 }
1055
1056
1057 // For Rich Edit controls. Do we need it?
1058 #if 0
1059 #if defined(__WIN95__)
1060 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1061 {
1062         wxCommandEvent event(0, m_windowId);
1063         int eventType = 0;
1064         NMHDR *hdr1 = (NMHDR *) lParam;
1065         switch ( hdr1->code )
1066         {
1067                 // Insert case code here
1068                 default :
1069                         return wxControl::MSWNotify(wParam, lParam);
1070                         break;
1071         }
1072
1073         event.SetEventObject( this );
1074         event.SetEventType(eventType);
1075
1076         if ( !ProcessEvent(event) )
1077                 return FALSE;
1078
1079         return TRUE;
1080 }
1081 #endif
1082 #endif
1083