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 USE_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 #include "fstream.h"
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #if defined(__BORLANDC__) && !defined(__WIN32__)
  42 #include <alloc.h>
  43 #else
  44 #ifndef __GNUWIN32__
  45 #include <malloc.h>
  46 #endif
  47 #define farmalloc malloc
  48 #define farfree free
  49 #endif
  50 #include <windowsx.h>
  51
  52 #include <string.h>
  53
  54 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  55 #include <richedit.h>
  56 #endif
  57
  58 #if !USE_SHARED_LIBRARY
  59 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  60
  61 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  62         EVT_CHAR(wxTextCtrl::OnChar)
  63         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  64         EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  65 END_EVENT_TABLE()
  66
  67 #endif
  68
  69 // Text item
  70 wxTextCtrl::wxTextCtrl(void)
  71 #ifndef NO_TEXT_WINDOW_STREAM
  72  :streambuf()
  73 #endif
  74 {
  75   fileName = "";
  76   m_isRich = FALSE;
  77 }
  78
  79 bool wxTextCtrl::Create(wxWindow *parent, const wxWindowID id,
  80                    const wxString& value,
  81            const wxPoint& pos,
  82            const wxSize& size, const long style,
  83            const wxValidator& validator,
  84            const wxString& name)
  85 {
  86   fileName = "";
  87   SetName(name);
  88   SetValidator(validator);
  89   if (parent) parent->AddChild(this);
  90
  91   m_windowStyle = style;
  92
  93   // Should this be taken from the system colours?
  94 //  SetBackgroundColour(wxColour(255, 255, 255));
  95
  96   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
  97
  98   SetForegroundColour(parent->GetDefaultForegroundColour()) ;
  99
 100   if ( id == -1 )
 101         m_windowId = (int)NewControlId();
 102   else
 103         m_windowId = id;
 104
 105   int x = pos.x;
 106   int y = pos.y;
 107   int width = size.x;
 108   int height = size.y;
 109
 110 #ifdef __WIN32__
 111   WXHGLOBAL m_globalHandle = 0;
 112 #else
 113   // Obscure method from the MS Developer's Network Disk for
 114   // using global memory instead of the local heap, which
 115   // runs out far too soon. Solves the problem with
 116   // failing to appear.
 117
 118   // Doesn't seem to work for Win95, so removing.
 119   m_globalHandle=0;
 120 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 121 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 122 //                         256L);
 123 #endif
 124   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 125   if (m_windowStyle & wxTE_MULTILINE)
 126         msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 127   else
 128     msStyle |= ES_AUTOHSCROLL ;
 129
 130   if (m_windowStyle & wxTE_READONLY)
 131     msStyle |= ES_READONLY;
 132
 133   if (m_windowStyle & wxHSCROLL)
 134     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 135   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 136     msStyle |= ES_PASSWORD;
 137
 138   char *windowClass = "EDIT";
 139 #if defined(__WIN95__)
 140   if ( m_windowStyle & wxTE_MULTILINE )
 141 #else
 142   if ( FALSE )
 143 #endif
 144   {
 145       msStyle |= ES_AUTOVSCROLL;
 146           m_isRich = TRUE;
 147           windowClass = "RichEdit" ;
 148   }
 149   else
 150           m_isRich = FALSE;
 151
 152   bool want3D;
 153   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 154
 155   // If we're in Win95, and we want a simple 2D border,
 156   // then make it an EDIT control instead.
 157 #if defined(__WIN95__)
 158   if (m_windowStyle & wxSIMPLE_BORDER)
 159   {
 160     windowClass = "EDIT";
 161         m_isRich = FALSE;
 162   }
 163 #endif
 164
 165   // Even with extended styles, need to combine with WS_BORDER
 166   // for them to look right.
 167   if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
 168        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 169     msStyle |= WS_BORDER;
 170
 171   HWND edit = CreateWindowEx(exStyle, windowClass, NULL,
 172                         msStyle,
 173                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 174                         m_globalHandle ? (HANDLE) m_globalHandle : wxGetInstance(), NULL);
 175
 176 #if CTL3D
 177   if ( want3D )
 178   {
 179     Ctl3dSubclassCtl(edit);
 180         m_useCtl3D = TRUE;
 181   }
 182 #endif
 183
 184   m_hWnd = (WXHWND)edit;
 185
 186 #if defined(__WIN95__)
 187   if (m_isRich)
 188   {
 189         // Have to enable events
 190         ::SendMessage(edit, EM_SETEVENTMASK, 0, ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 191   }
 192 #endif
 193
 194   SubclassWin(GetHWND());
 195
 196   if ( parent->GetFont() && parent->GetFont()->Ok() )
 197   {
 198         SetFont(* parent->GetFont());
 199   }
 200   else
 201   {
 202         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 203   }
 204
 205   SetSize(x, y, width, height);
 206
 207   // Causes a crash for Symantec C++ and WIN32 for some reason
 208 #if !(defined(__SC__) && defined(__WIN32__))
 209   if (value != "")
 210     SetWindowText(edit, (const char *)value);
 211 #endif
 212
 213   return TRUE;
 214 }
 215
 216 // Make sure the window style (etc.) reflects the HWND style (roughly)
 217 void wxTextCtrl::AdoptAttributesFromHWND(void)
 218 {
 219         wxWindow::AdoptAttributesFromHWND();
 220
 221         HWND hWnd = (HWND) GetHWND();
 222         long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 223
 224     char buf[256];
 225
 226 #ifndef __WIN32__
 227         GetClassName((HWND) hWnd, buf, 256);
 228 #else
 229 #ifdef UNICODE
 230         GetClassNameW((HWND) hWnd, buf, 256);
 231 #else
 232         GetClassNameA((HWND) hWnd, buf, 256);
 233 #endif
 234 #endif
 235
 236         wxString str(buf);
 237         str.UpperCase();
 238
 239         if (str == "EDIT")
 240                 m_isRich = FALSE;
 241         else
 242                 m_isRich = TRUE;
 243
 244         if (style & ES_MULTILINE)
 245                 m_windowStyle |= wxTE_MULTILINE;
 246         if (style & ES_PASSWORD)
 247                 m_windowStyle |= wxTE_PASSWORD;
 248         if (style & ES_READONLY)
 249                 m_windowStyle |= wxTE_READONLY;
 250         if (style & ES_WANTRETURN)
 251                 m_windowStyle |= wxTE_PROCESS_ENTER;
 252 }
 253
 254 void wxTextCtrl::SetupColours(void)
 255 {
 256   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 257   SetForegroundColour(GetParent()->GetDefaultForegroundColour());
 258 }
 259
 260 wxString wxTextCtrl::GetValue(void) const
 261 {
 262     int length = GetWindowTextLength((HWND) GetHWND());
 263     char *s = new char[length+1];
 264     GetWindowText((HWND) GetHWND(), s, length+1);
 265     wxString str(s);
 266     delete[] s;
 267         return str;
 268 }
 269
 270 void wxTextCtrl::SetValue(const wxString& value)
 271 {
 272   // If newlines are denoted by just 10, must stick 13 in front.
 273   int singletons = 0;
 274   int len = value.Length();
 275   int i;
 276   for (i = 0; i < len; i ++)
 277   {
 278     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 279       singletons ++;
 280   }
 281   if (singletons > 0)
 282   {
 283     char *tmp = new char[len + singletons + 1];
 284     int j = 0;
 285     for (i = 0; i < len; i ++)
 286     {
 287       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 288       {
 289         tmp[j] = 13;
 290         j ++;
 291       }
 292       tmp[j] = value[i];
 293       j ++;
 294     }
 295     tmp[j] = 0;
 296     SetWindowText((HWND) GetHWND(), tmp);
 297     delete[] tmp;
 298   }
 299   else
 300     SetWindowText((HWND) GetHWND(), (const char *)value);
 301 }
 302
 303 void wxTextCtrl::SetSize(const int x, const int y, const int width, const int height, const int sizeFlags)
 304 {
 305   int currentX, currentY;
 306   GetPosition(&currentX, &currentY);
 307   int x1 = x;
 308   int y1 = y;
 309   int w1 = width;
 310   int h1 = height;
 311
 312   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 313     x1 = currentX;
 314   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 315     y1 = currentY;
 316
 317   int cx; // button font dimensions
 318   int cy;
 319
 320   wxGetCharSize(GetHWND(), &cx, &cy,GetFont());
 321
 322   float control_width, control_height, control_x, control_y;
 323
 324   // If we're prepared to use the existing size, then...
 325   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 326   {
 327     GetSize(&w1, &h1);
 328   }
 329
 330   // Deal with default size (using -1 values)
 331   if (w1<=0)
 332     w1 = DEFAULT_ITEM_WIDTH;
 333
 334   control_x = (float)x1;
 335   control_y = (float)y1;
 336   control_width = (float)w1;
 337   control_height = (float)h1;
 338
 339   // Calculations may have made text size too small
 340   if (control_height <= 0)
 341     control_height = (float)(int)(cy*EDIT_CONTROL_FACTOR) ;
 342
 343   if (control_width <= 0)
 344     control_width = (float)DEFAULT_ITEM_WIDTH;
 345
 346   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 347                               (int)control_width, (int)control_height, TRUE);
 348 /*
 349 #if WXWIN_COMPATIBILITY
 350   GetEventHandler()->OldOnSize(width, height);
 351 #else
 352   wxSizeEvent event(wxSize(width, height), m_windowId);
 353   event.eventObject = this;
 354   GetEventHandler()->ProcessEvent(event);
 355 #endif
 356 */
 357 }
 358
 359 // Clipboard operations
 360 void wxTextCtrl::Copy(void)
 361 {
 362   HWND hWnd = (HWND) GetHWND();
 363   SendMessage(hWnd, WM_COPY, 0, 0L);
 364 }
 365
 366 void wxTextCtrl::Cut(void)
 367 {
 368   HWND hWnd = (HWND) GetHWND();
 369   SendMessage(hWnd, WM_CUT, 0, 0L);
 370 }
 371
 372 void wxTextCtrl::Paste(void)
 373 {
 374   HWND hWnd = (HWND) GetHWND();
 375   SendMessage(hWnd, WM_PASTE, 0, 0L);
 376 }
 377
 378 void wxTextCtrl::SetEditable(const bool editable)
 379 {
 380   HWND hWnd = (HWND) GetHWND();
 381   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 382 }
 383
 384 void wxTextCtrl::SetInsertionPoint(const long pos)
 385 {
 386   HWND hWnd = (HWND) GetHWND();
 387 #ifdef __WIN32__
 388 #if defined(__WIN95__)
 389   if ( m_isRich)
 390   {
 391     CHARRANGE range;
 392     range.cpMin = pos;
 393     range.cpMax = pos;
 394     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 395     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 396   }
 397   else
 398 #endif
 399   {
 400     SendMessage(hWnd, EM_SETSEL, pos, pos);
 401     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 402   }
 403 #else
 404   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 405 #endif
 406   char *nothing = "";
 407   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 408 }
 409
 410 void wxTextCtrl::SetInsertionPointEnd(void)
 411 {
 412   long pos = GetLastPosition();
 413   SetInsertionPoint(pos);
 414 }
 415
 416 long wxTextCtrl::GetInsertionPoint(void) const
 417 {
 418 #if defined(__WIN95__)
 419   if (m_isRich)
 420   {
 421     CHARRANGE range;
 422     range.cpMin = 0;
 423     range.cpMax = 0;
 424     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 425     return range.cpMin;
 426   }
 427 #endif
 428
 429   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 430   return Pos&0xFFFF;
 431 }
 432
 433 long wxTextCtrl::GetLastPosition(void) const
 434 {
 435     HWND hWnd = (HWND) GetHWND();
 436
 437     // Will always return a number > 0 (according to docs)
 438     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 439
 440     // This gets the char index for the _beginning_ of the last line
 441     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 442
 443     // Get number of characters in the last line. We'll add this to the character
 444     // index for the last line, 1st position.
 445     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 446
 447     return (long)(charIndex + lineLength);
 448 }
 449
 450 void wxTextCtrl::Replace(const long from, const long to, const wxString& value)
 451 {
 452     HWND hWnd = (HWND) GetHWND();
 453     long fromChar = from;
 454     long toChar = to;
 455
 456     // Set selection and remove it
 457 #ifdef __WIN32__
 458     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 459 #else
 460     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 461 #endif
 462     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 463
 464     // Now replace with 'value', by pasting.
 465     wxSetClipboardData(wxCF_TEXT, (wxObject *) (const char *)value, 0, 0);
 466
 467     // Paste into edit control
 468     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 469 }
 470
 471 void wxTextCtrl::Remove(const long from, const long to)
 472 {
 473     HWND hWnd = (HWND) GetHWND();
 474     long fromChar = from;
 475     long toChar = to;
 476
 477     // Cut all selected text
 478 #ifdef __WIN32__
 479     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 480 #else
 481     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 482 #endif
 483     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 484 }
 485
 486 void wxTextCtrl::SetSelection(const long from, const long to)
 487 {
 488     HWND hWnd = (HWND) GetHWND();
 489     long fromChar = from;
 490     long toChar = to;
 491     // if from and to are both -1, it means
 492     // (in wxWindows) that all text should be selected.
 493     // This translates into Windows convention
 494     if ((from == -1) && (to == -1))
 495     {
 496       fromChar = 0;
 497       toChar = -1;
 498     }
 499
 500 #ifdef __WIN32__
 501     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 502     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 503 #else
 504     // WPARAM is 0: selection is scrolled into view
 505     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 506 #endif
 507 }
 508
 509 bool wxTextCtrl::LoadFile(const wxString& file)
 510 {
 511   if (!FileExists(WXSTRINGCAST file))
 512     return FALSE;
 513
 514   fileName = file;
 515
 516   Clear();
 517
 518   ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 519
 520   if (!input.bad())
 521   {
 522       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 523       // line by line into the control. Apart from being very slow this
 524       // was limited to 32K of text by the external interface presenting
 525       // positions as signed shorts. Now load in one chunk...
 526       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 527
 528       struct stat stat_buf;
 529       if (stat(file, &stat_buf) < 0)
 530         return FALSE;
 531 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 532       // This may need to be a bigger buffer than the file size suggests,
 533       // if it's a UNIX file. Give it an extra 1000 just in case.
 534       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 535       long no_lines = 0;
 536       long pos = 0;
 537       while (!input.eof() && input.peek() != EOF)
 538       {
 539         input.getline(wxBuffer, 500);
 540         int len = strlen(wxBuffer);
 541         wxBuffer[len] = 13;
 542         wxBuffer[len+1] = 10;
 543         wxBuffer[len+2] = 0;
 544         strcpy(tmp_buffer+pos, wxBuffer);
 545         pos += strlen(wxBuffer);
 546         no_lines++;
 547       }
 548
 549 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 550       SetWindowText((HWND) GetHWND(), tmp_buffer);
 551       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 552       farfree(tmp_buffer);
 553
 554       return TRUE;
 555   }
 556   return FALSE;
 557 }
 558
 559 // If file is null, try saved file name first
 560 // Returns TRUE if succeeds.
 561 bool wxTextCtrl::SaveFile(const wxString& file)
 562 {
 563   wxString theFile;
 564   if (file == "")
 565     theFile = fileName;
 566   if (file == "")
 567     return FALSE;
 568   fileName = theFile;
 569
 570   ofstream output(WXSTRINGCAST file);
 571   if (output.bad())
 572         return FALSE;
 573
 574     // This will only save 64K max
 575     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 576     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 577     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 578     char *pstr = tmp_buffer;
 579
 580         // Convert \r\n to just \n
 581         while (*pstr)
 582         {
 583                 if (*pstr != '\r')
 584                         output << *pstr;
 585                 pstr++;
 586         }
 587
 588     farfree(tmp_buffer);
 589     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 590
 591     return TRUE;
 592 }
 593
 594 void wxTextCtrl::WriteText(const wxString& text)
 595 {
 596     // Covert \n to \r\n
 597     int len = text.Length();
 598     char *newtext = new char[(len*2)+1];
 599     int i = 0;
 600     int j = 0;
 601     while (i < len)
 602     {
 603       if (text[i] == '\n')
 604       {
 605         newtext[j] = '\r';
 606         j ++;
 607       }
 608       newtext[j] = text[i];
 609       i ++;
 610       j ++;
 611     }
 612     newtext[j] = 0;
 613     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 614     delete[] newtext;
 615 }
 616
 617 void wxTextCtrl::Clear(void)
 618 {
 619 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 620     SetWindowText((HWND) GetHWND(), "");
 621 }
 622
 623 bool wxTextCtrl::IsModified(void) const
 624 {
 625     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 626 }
 627
 628 // Makes 'unmodified'
 629 void wxTextCtrl::DiscardEdits(void)
 630 {
 631   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 632 }
 633
 634 /*
 635  * Some of the following functions are yet to be implemented
 636  *
 637  */
 638
 639 int wxTextCtrl::GetNumberOfLines(void) const
 640 {
 641     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 642 }
 643
 644 long wxTextCtrl::XYToPosition(const long x, const long y) const
 645 {
 646     HWND hWnd = (HWND) GetHWND();
 647
 648     // This gets the char index for the _beginning_ of this line
 649     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 650     return (long)(x + charIndex);
 651 }
 652
 653 void wxTextCtrl::PositionToXY(const long pos, long *x, long *y) const
 654 {
 655     HWND hWnd = (HWND) GetHWND();
 656
 657     // This gets the line number containing the character
 658     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 659     // This gets the char index for the _beginning_ of this line
 660     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 661     // The X position must therefore be the different between pos and charIndex
 662     *x = (long)(pos - charIndex);
 663     *y = (long)lineNo;
 664 }
 665
 666 void wxTextCtrl::ShowPosition(const long pos)
 667 {
 668     HWND hWnd = (HWND) GetHWND();
 669
 670     // To scroll to a position, we pass the number of lines and characters
 671     // to scroll *by*. This means that we need to:
 672     // (1) Find the line position of the current line.
 673     // (2) Find the line position of pos.
 674     // (3) Scroll by (pos - current).
 675     // For now, ignore the horizontal scrolling.
 676
 677     // Is this where scrolling is relative to - the line containing the caret?
 678     // Or is the first visible line??? Try first visible line.
 679 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 680
 681     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 682
 683     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 684
 685     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 686
 687 /*
 688     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 689       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 690 */
 691
 692     if (linesToScroll != 0)
 693       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 694 }
 695
 696 int wxTextCtrl::GetLineLength(const long lineNo) const
 697 {
 698     long charIndex = XYToPosition(0, lineNo);
 699     HWND hWnd = (HWND) GetHWND();
 700     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 701     return len;
 702 }
 703
 704 wxString wxTextCtrl::GetLineText(const long lineNo) const
 705 {
 706     HWND hWnd = (HWND) GetHWND();
 707     *(WORD *)wxBuffer = 512;
 708     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 709     wxBuffer[noChars] = 0;
 710         return wxString(wxBuffer);
 711 }
 712
 713 /*
 714  * Text item
 715  */
 716
 717 void wxTextCtrl::Command(wxCommandEvent & event)
 718 {
 719   SetValue (event.GetString());
 720   ProcessCommand (event);
 721 }
 722
 723 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 724 {
 725   // By default, load the first file into the text window.
 726   if (event.GetNumberOfFiles() > 0)
 727   {
 728     LoadFile(event.GetFiles()[0]);
 729   }
 730 }
 731
 732 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 733 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 734
 735 //=========================================================================
 736 // Called then the buffer is full (gcc 2.6.3)
 737 // or when "endl" is output (Borland 4.5)
 738 //=========================================================================
 739 // Class declaration using multiple inheritance doesn't work properly for
 740 // Borland. See note in wb_text.h.
 741 #ifndef NO_TEXT_WINDOW_STREAM
 742 int wxTextCtrl::overflow(int c)
 743 {
 744   // Make sure there is a holding area
 745   if ( allocate()==EOF )
 746   {
 747     wxError("Streambuf allocation failed","Internal error");
 748     return EOF;
 749   }
 750
 751   // Verify that there are no characters in get area
 752   if ( gptr() && gptr() < egptr() )
 753   {
 754      wxError("Who's trespassing my get area?","Internal error");
 755      return EOF;
 756   }
 757
 758   // Reset get area
 759   setg(0,0,0);
 760
 761   // Make sure there is a put area
 762   if ( ! pptr() )
 763   {
 764 /* This doesn't seem to be fatal so comment out error message */
 765 //    wxError("Put area not opened","Internal error");
 766     setp( base(), base() );
 767   }
 768
 769   // Determine how many characters have been inserted but no consumed
 770   int plen = pptr() - pbase();
 771
 772   // Now Jerry relies on the fact that the buffer is at least 2 chars
 773   // long, but the holding area "may be as small as 1" ???
 774   // And we need an additional \0, so let's keep this inefficient but
 775   // safe copy.
 776
 777   // If c!=EOF, it is a character that must also be comsumed
 778   int xtra = c==EOF? 0 : 1;
 779
 780   // Write temporary C-string to wxTextWindow
 781   {
 782   char *txt = new char[plen+xtra+1];
 783   memcpy(txt, pbase(), plen);
 784   txt[plen] = (char)c;     // append c
 785   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 786     // If the put area already contained \0, output will be truncated there
 787   WriteText(txt);
 788     delete[] txt;
 789   }
 790
 791   // Reset put area
 792   setp(pbase(), epptr());
 793
 794 #if defined(__WATCOMC__)
 795   return __NOT_EOF;
 796 #elif defined(zapeof)     // HP-UX (all cfront based?)
 797   return zapeof(c);
 798 #else
 799   return c!=EOF ? c : 0;  // this should make everybody happy
 800 #endif
 801
 802 /* OLD CODE
 803   int len = pptr() - pbase();
 804   char *txt = new char[len+1];
 805   strncpy(txt, pbase(), len);
 806   txt[len] = '\0';
 807   (*this) << txt;
 808   setp(pbase(), epptr());
 809   delete[] txt;
 810   return EOF;
 811 */
 812 }
 813
 814 //=========================================================================
 815 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 816 //=========================================================================
 817 int wxTextCtrl::sync(void)
 818 {
 819   // Verify that there are no characters in get area
 820   if ( gptr() && gptr() < egptr() )
 821   {
 822      wxError("Who's trespassing my get area?","Internal error");
 823      return EOF;
 824   }
 825
 826   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 827
 828   return 0;
 829 /* OLD CODE
 830   int len = pptr() - pbase();
 831   char *txt = new char[len+1];
 832   strncpy(txt, pbase(), len);
 833   txt[len] = '\0';
 834   (*this) << txt;
 835   setp(pbase(), epptr());
 836   delete[] txt;
 837   return 0;
 838 */
 839 }
 840
 841 //=========================================================================
 842 // Should not be called by a "ostream". Used by a "istream"
 843 //=========================================================================
 844 int wxTextCtrl::underflow(void)
 845 {
 846   return EOF;
 847 }
 848 #endif
 849
 850 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 851 {
 852   WriteText(s);
 853   return *this;
 854 }
 855
 856 wxTextCtrl& wxTextCtrl::operator<<(const float f)
 857 {
 858   static char buf[100];
 859   sprintf(buf, "%.2f", f);
 860   WriteText(buf);
 861   return *this;
 862 }
 863
 864 wxTextCtrl& wxTextCtrl::operator<<(const double d)
 865 {
 866   static char buf[100];
 867   sprintf(buf, "%.2f", d);
 868   WriteText(buf);
 869   return *this;
 870 }
 871
 872 wxTextCtrl& wxTextCtrl::operator<<(const int i)
 873 {
 874   static char buf[100];
 875   sprintf(buf, "%i", i);
 876   WriteText(buf);
 877   return *this;
 878 }
 879
 880 wxTextCtrl& wxTextCtrl::operator<<(const long i)
 881 {
 882   static char buf[100];
 883   sprintf(buf, "%ld", i);
 884   WriteText(buf);
 885   return *this;
 886 }
 887
 888 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 889 {
 890   char buf[2];
 891
 892   buf[0] = c;
 893   buf[1] = 0;
 894   WriteText(buf);
 895   return *this;
 896 }
 897
 898
 899 WXHBRUSH wxTextCtrl::OnCtlColor(const WXHDC pDC, const WXHWND pWnd, const WXUINT nCtlColor,
 900                         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 901 {
 902 #if CTL3D
 903   if ( m_useCtl3D )
 904   {
 905     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 906     return (WXHBRUSH) hbrush;
 907   }
 908 #endif
 909
 910   if (GetParent()->GetTransparentBackground())
 911     SetBkMode((HDC) pDC, TRANSPARENT);
 912   else
 913     SetBkMode((HDC) pDC, OPAQUE);
 914
 915   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 916   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 917
 918   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 919
 920   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 921   // has a zero usage count.
 922   // NOT NOW - will be cleaned up at end of app.
 923 //  backgroundBrush->RealizeResource();
 924   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 925 }
 926
 927 void wxTextCtrl::OnChar(wxKeyEvent& event)
 928 {
 929         if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 930         {
 931                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 932                 event.SetEventObject( this );
 933                 if ( !GetEventHandler()->ProcessEvent(event) )
 934                         event.Skip();
 935         }
 936         else
 937                 event.Skip();
 938 }
 939
 940 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 941 {
 942 /*
 943     switch (nMsg)
 944     {
 945       case WM_GETDLGCODE:
 946       {
 947         if (GetWindowStyleFlag() & wxPROCESS_ENTER)
 948           return DLGC_WANTALLKEYS;
 949         break;
 950       }
 951       case WM_CHAR: // Always an ASCII character
 952       {
 953         if (wParam == VK_RETURN)
 954         {
 955           wxCommandEvent event(wxEVENT_TYPE_TEXT_ENTER_COMMAND);
 956           event.commandString = ((wxTextCtrl *)item)->GetValue();
 957           event.eventObject = item;
 958           item->ProcessCommand(event);
 959           return FALSE;
 960         }
 961         break;
 962       }
 963     default:
 964         break;
 965     }
 966 */
 967
 968   return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 969 }
 970
 971 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 972 {
 973     if ( m_windowStyle & wxTE_MULTILINE )
 974     {
 975         // No flicker - only problem is we probably can't change the background
 976         Default();
 977 /*
 978         RECT rect;
 979         ::GetClientRect((HWND) GetHWND(), &rect);
 980
 981         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 982         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 983
 984         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 985         ::DeleteObject(hBrush);
 986         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 987 */
 988     }
 989 //        wxWindow::OnEraseBackground(event);
 990 }
 991
 992 bool wxTextCtrl::MSWCommand(const WXUINT param, const WXWORD WXUNUSED(id))
 993 {
 994 /*
 995   // Debugging
 996   wxDebugMsg("Edit control %d: ", (int)id);
 997   switch (param)
 998   {
 999     case EN_SETFOCUS:
1000       wxDebugMsg("EN_SETFOCUS\n");
1001       break;
1002     case EN_KILLFOCUS:
1003       wxDebugMsg("EN_KILLFOCUS\n");
1004       break;
1005     case EN_CHANGE:
1006       wxDebugMsg("EN_CHANGE\n");
1007       break;
1008     case EN_UPDATE:
1009       wxDebugMsg("EN_UPDATE\n");
1010       break;
1011     case EN_ERRSPACE:
1012       wxDebugMsg("EN_ERRSPACE\n");
1013       break;
1014     case EN_MAXTEXT:
1015       wxDebugMsg("EN_MAXTEXT\n");
1016       break;
1017     case EN_HSCROLL:
1018       wxDebugMsg("EN_HSCROLL\n");
1019       break;
1020     case EN_VSCROLL:
1021       wxDebugMsg("EN_VSCROLL\n");
1022       break;
1023     default:
1024       wxDebugMsg("Unknown EDIT notification\n");
1025       break;
1026   }
1027 */
1028   WXTYPE eventTyp = 0;
1029   switch (param)
1030   {
1031     case EN_SETFOCUS:
1032       eventTyp = wxEVENT_TYPE_SET_FOCUS;
1033       break;
1034     case EN_KILLFOCUS:
1035       eventTyp = wxEVENT_TYPE_KILL_FOCUS;
1036       break;
1037     case EN_UPDATE:
1038           break;
1039     case EN_CHANGE:
1040       eventTyp = wxEVENT_TYPE_TEXT_COMMAND;
1041       break;
1042     case EN_ERRSPACE:
1043       break;
1044     case EN_MAXTEXT:
1045       break;
1046     case EN_HSCROLL:
1047        break;
1048     case EN_VSCROLL:
1049       break;
1050     default:
1051       break;
1052   }
1053   if (eventTyp != 0)
1054   {
1055     wxCommandEvent event(eventTyp, m_windowId);
1056         wxString val(GetValue());
1057         if ( !val.IsNull() )
1058       event.m_commandString = WXSTRINGCAST val;
1059     event.SetEventObject( this );
1060     ProcessCommand(event);
1061
1062     return TRUE;
1063   }
1064   else
1065     return FALSE;
1066 }
1067
1068
1069 // For Rich Edit controls. Do we need it?
1070 #if 0
1071 #if defined(__WIN95__)
1072 bool wxTextCtrl::MSWNotify(const WXWPARAM wParam, const WXLPARAM lParam)
1073 {
1074         wxCommandEvent event(0, m_windowId);
1075         int eventType = 0;
1076         NMHDR *hdr1 = (NMHDR *) lParam;
1077         switch ( hdr1->code )
1078         {
1079                 // Insert case code here
1080                 default :
1081                         return wxControl::MSWNotify(wParam, lParam);
1082                         break;
1083         }
1084
1085         event.SetEventObject( this );
1086         event.SetEventType(eventType);
1087
1088         if ( !ProcessEvent(event) )
1089                 return FALSE;
1090
1091         return TRUE;
1092 }
1093 #endif
1094 #endif
1095