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 #  ifdef _MSC_VER
  46       using namespace std;
  47 #  endif
  48 #endif
  49
  50 #include <sys/types.h>
  51 #ifndef __MWERKS__
  52 #include <sys/stat.h>
  53 #else
  54 #include <stat.h>
  55 #endif
  56 #if defined(__BORLANDC__) && !defined(__WIN32__)
  57 #include <alloc.h>
  58 #else
  59 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
  60 #include <malloc.h>
  61 #endif
  62 #define farmalloc malloc
  63 #define farfree free
  64 #endif
  65 #include <windowsx.h>
  66
  67 #include <string.h>
  68
  69 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  70 #include <richedit.h>
  71 #endif
  72
  73 #if !USE_SHARED_LIBRARY
  74 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  75
  76 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  77   EVT_CHAR(wxTextCtrl::OnChar)
  78   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  79   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  80 END_EVENT_TABLE()
  81
  82 #endif
  83
  84 // Text item
  85 wxTextCtrl::wxTextCtrl(void)
  86 #ifndef NO_TEXT_WINDOW_STREAM
  87  :streambuf()
  88 #endif
  89 {
  90   m_fileName = "";
  91   m_isRich = FALSE;
  92 }
  93
  94 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  95                         const wxString& value,
  96                         const wxPoint& pos,
  97                         const wxSize& size, long style,
  98                         const wxValidator& validator,
  99                         const wxString& name)
 100 {
 101   m_fileName = "";
 102   SetName(name);
 103   SetValidator(validator);
 104   if (parent) parent->AddChild(this);
 105
 106   m_windowStyle = style;
 107
 108   // Should this be taken from the system colours?
 109 //  SetBackgroundColour(wxColour(255, 255, 255));
 110
 111   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 112
 113   SetForegroundColour(parent->GetForegroundColour()) ;
 114
 115   if ( id == -1 )
 116     m_windowId = (int)NewControlId();
 117   else
 118   m_windowId = id;
 119
 120   int x = pos.x;
 121   int y = pos.y;
 122   int width = size.x;
 123   int height = size.y;
 124
 125 #ifdef __WIN32__
 126   WXHGLOBAL m_globalHandle = 0;
 127 #else
 128   // Obscure method from the MS Developer's Network Disk for
 129   // using global memory instead of the local heap, which
 130   // runs out far too soon. Solves the problem with
 131   // failing to appear.
 132
 133   // Doesn't seem to work for Win95, so removing.
 134   m_globalHandle=0;
 135 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 136 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 137 //                         256L);
 138 #endif
 139
 140   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 141   if (m_windowStyle & wxTE_MULTILINE)
 142   msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 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   char *windowClass = "EDIT";
 155 #if defined(__WIN95__)
 156   if ( m_windowStyle & wxTE_MULTILINE )
 157   {
 158     msStyle |= ES_AUTOVSCROLL;
 159     m_isRich = TRUE;
 160     windowClass = "RichEdit" ;
 161   }
 162   else
 163 #endif
 164     m_isRich = FALSE;
 165
 166   bool want3D;
 167   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 168
 169   // If we're in Win95, and we want a simple 2D border,
 170   // then make it an EDIT control instead.
 171 #if defined(__WIN95__)
 172   if (m_windowStyle & wxSIMPLE_BORDER)
 173   {
 174     windowClass = "EDIT";
 175   m_isRich = FALSE;
 176   }
 177 #endif
 178
 179   // Even with extended styles, need to combine with WS_BORDER
 180   // for them to look right.
 181   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 182     msStyle |= WS_BORDER;
 183
 184   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 185                         msStyle,
 186                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 187                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 188
 189   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 190
 191 #if CTL3D
 192   if ( want3D )
 193   {
 194     Ctl3dSubclassCtl((HWND)m_hWnd);
 195     m_useCtl3D = TRUE;
 196   }
 197 #endif
 198
 199 #if defined(__WIN95__)
 200   if (m_isRich)
 201   {
 202     // Have to enable events
 203     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 204                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 205   }
 206 #endif
 207
 208   SubclassWin(GetHWND());
 209
 210   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 211   {
 212     SetFont(parent->GetFont());
 213   }
 214   else
 215   {
 216     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 217   }
 218
 219   SetSize(x, y, width, height);
 220
 221   // Causes a crash for Symantec C++ and WIN32 for some reason
 222 #if !(defined(__SC__) && defined(__WIN32__))
 223   if ( !value.IsEmpty() )
 224   {
 225     SetValue(value);
 226   }
 227 #endif
 228
 229   return TRUE;
 230 }
 231
 232 // Make sure the window style (etc.) reflects the HWND style (roughly)
 233 void wxTextCtrl::AdoptAttributesFromHWND(void)
 234 {
 235   wxWindow::AdoptAttributesFromHWND();
 236
 237   HWND hWnd = (HWND) GetHWND();
 238   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 239
 240     char buf[256];
 241
 242 #ifndef __WIN32__
 243   GetClassName((HWND) hWnd, buf, 256);
 244 #else
 245 #ifdef UNICODE
 246   GetClassNameW((HWND) hWnd, buf, 256);
 247 #else
 248   GetClassNameA((HWND) hWnd, buf, 256);
 249 #endif
 250 #endif
 251
 252   wxString str(buf);
 253   str.UpperCase();
 254
 255   if (str == "EDIT")
 256     m_isRich = FALSE;
 257   else
 258     m_isRich = TRUE;
 259
 260   if (style & ES_MULTILINE)
 261     m_windowStyle |= wxTE_MULTILINE;
 262   if (style & ES_PASSWORD)
 263     m_windowStyle |= wxTE_PASSWORD;
 264   if (style & ES_READONLY)
 265     m_windowStyle |= wxTE_READONLY;
 266   if (style & ES_WANTRETURN)
 267     m_windowStyle |= wxTE_PROCESS_ENTER;
 268 }
 269
 270 void wxTextCtrl::SetupColours(void)
 271 {
 272   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 273   SetForegroundColour(GetParent()->GetForegroundColour());
 274 }
 275
 276 wxString wxTextCtrl::GetValue(void) const
 277 {
 278     int length = GetWindowTextLength((HWND) GetHWND());
 279     char *s = new char[length+1];
 280     GetWindowText((HWND) GetHWND(), s, length+1);
 281     wxString str(s);
 282     delete[] s;
 283   return str;
 284 }
 285
 286 void wxTextCtrl::SetValue(const wxString& value)
 287 {
 288   // If newlines are denoted by just 10, must stick 13 in front.
 289   int singletons = 0;
 290   int len = value.Length();
 291   int i;
 292   for (i = 0; i < len; i ++)
 293   {
 294     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 295       singletons ++;
 296   }
 297   if (singletons > 0)
 298   {
 299     char *tmp = new char[len + singletons + 1];
 300     int j = 0;
 301     for (i = 0; i < len; i ++)
 302     {
 303       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 304       {
 305         tmp[j] = 13;
 306         j ++;
 307       }
 308       tmp[j] = value[i];
 309       j ++;
 310     }
 311     tmp[j] = 0;
 312     SetWindowText((HWND) GetHWND(), tmp);
 313     delete[] tmp;
 314   }
 315   else
 316     SetWindowText((HWND) GetHWND(), (const char *)value);
 317 }
 318
 319 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 320 {
 321   int currentX, currentY;
 322   GetPosition(&currentX, &currentY);
 323   int x1 = x;
 324   int y1 = y;
 325   int w1 = width;
 326   int h1 = height;
 327
 328   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 329     x1 = currentX;
 330   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 331     y1 = currentY;
 332
 333   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 334
 335   int cx; // button font dimensions
 336   int cy;
 337
 338   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 339
 340   int control_width, control_height, control_x, control_y;
 341
 342   // If we're prepared to use the existing size, then...
 343   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 344   {
 345     GetSize(&w1, &h1);
 346   }
 347
 348   // Deal with default size (using -1 values)
 349   if (w1<=0)
 350     w1 = DEFAULT_ITEM_WIDTH;
 351
 352   control_x = x1;
 353   control_y = y1;
 354   control_width = w1;
 355   control_height = h1;
 356
 357   // Calculations may have made text size too small
 358   if (control_height <= 0)
 359     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 360
 361   if (control_width <= 0)
 362     control_width = DEFAULT_ITEM_WIDTH;
 363
 364   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 365                               (int)control_width, (int)control_height, TRUE);
 366 }
 367
 368 // Clipboard operations
 369 void wxTextCtrl::Copy(void)
 370 {
 371   HWND hWnd = (HWND) GetHWND();
 372   SendMessage(hWnd, WM_COPY, 0, 0L);
 373 }
 374
 375 void wxTextCtrl::Cut(void)
 376 {
 377   HWND hWnd = (HWND) GetHWND();
 378   SendMessage(hWnd, WM_CUT, 0, 0L);
 379 }
 380
 381 void wxTextCtrl::Paste(void)
 382 {
 383   HWND hWnd = (HWND) GetHWND();
 384   SendMessage(hWnd, WM_PASTE, 0, 0L);
 385 }
 386
 387 void wxTextCtrl::SetEditable(bool editable)
 388 {
 389   HWND hWnd = (HWND) GetHWND();
 390   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 391 }
 392
 393 void wxTextCtrl::SetInsertionPoint(long pos)
 394 {
 395   HWND hWnd = (HWND) GetHWND();
 396 #ifdef __WIN32__
 397 #if defined(__WIN95__)
 398   if ( m_isRich)
 399   {
 400     CHARRANGE range;
 401     range.cpMin = pos;
 402     range.cpMax = pos;
 403     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 404     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 405   }
 406   else
 407 #endif
 408   {
 409     SendMessage(hWnd, EM_SETSEL, pos, pos);
 410     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 411   }
 412 #else
 413   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 414 #endif
 415   char *nothing = "";
 416   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 417 }
 418
 419 void wxTextCtrl::SetInsertionPointEnd(void)
 420 {
 421   long pos = GetLastPosition();
 422   SetInsertionPoint(pos);
 423 }
 424
 425 long wxTextCtrl::GetInsertionPoint(void) const
 426 {
 427 #if defined(__WIN95__)
 428   if (m_isRich)
 429   {
 430     CHARRANGE range;
 431     range.cpMin = 0;
 432     range.cpMax = 0;
 433     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 434     return range.cpMin;
 435   }
 436 #endif
 437
 438   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 439   return Pos&0xFFFF;
 440 }
 441
 442 long wxTextCtrl::GetLastPosition(void) const
 443 {
 444     HWND hWnd = (HWND) GetHWND();
 445
 446     // Will always return a number > 0 (according to docs)
 447     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 448
 449     // This gets the char index for the _beginning_ of the last line
 450     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 451
 452     // Get number of characters in the last line. We'll add this to the character
 453     // index for the last line, 1st position.
 454     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 455
 456     return (long)(charIndex + lineLength);
 457 }
 458
 459 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 460 {
 461     HWND hWnd = (HWND) GetHWND();
 462     long fromChar = from;
 463     long toChar = to;
 464
 465     // Set selection and remove it
 466 #ifdef __WIN32__
 467     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 468 #else
 469     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 470 #endif
 471     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 472
 473     // Now replace with 'value', by pasting.
 474     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 475
 476     // Paste into edit control
 477     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 478 }
 479
 480 void wxTextCtrl::Remove(long from, long to)
 481 {
 482     HWND hWnd = (HWND) GetHWND();
 483     long fromChar = from;
 484     long toChar = to;
 485
 486     // Cut all selected text
 487 #ifdef __WIN32__
 488     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 489 #else
 490     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 491 #endif
 492     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 493 }
 494
 495 void wxTextCtrl::SetSelection(long from, long to)
 496 {
 497     HWND hWnd = (HWND) GetHWND();
 498     long fromChar = from;
 499     long toChar = to;
 500     // if from and to are both -1, it means
 501     // (in wxWindows) that all text should be selected.
 502     // This translates into Windows convention
 503     if ((from == -1) && (to == -1))
 504     {
 505       fromChar = 0;
 506       toChar = -1;
 507     }
 508
 509 #ifdef __WIN32__
 510     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 511     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 512 #else
 513     // WPARAM is 0: selection is scrolled into view
 514     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 515 #endif
 516 }
 517
 518 bool wxTextCtrl::LoadFile(const wxString& file)
 519 {
 520   if (!wxFileExists(WXSTRINGCAST file))
 521     return FALSE;
 522
 523   m_fileName = file;
 524
 525   Clear();
 526
 527 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 528   ifstream input(WXSTRINGCAST file, ios::in);
 529
 530   if (!input.bad())
 531   {
 532       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 533       // line by line into the control. Apart from being very slow this
 534       // was limited to 32K of text by the external interface presenting
 535       // positions as signed shorts. Now load in one chunk...
 536       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 537
 538 #ifdef __SALFORDC__
 539       struct _stat stat_buf;
 540       if (stat((char*) (const char*) file, &stat_buf) < 0)
 541         return FALSE;
 542 #else
 543       struct stat stat_buf;
 544       if (stat(file, &stat_buf) < 0)
 545         return FALSE;
 546 #endif
 547
 548 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 549       // This may need to be a bigger buffer than the file size suggests,
 550       // if it's a UNIX file. Give it an extra 1000 just in case.
 551       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 552       long no_lines = 0;
 553       long pos = 0;
 554       while (!input.eof() && input.peek() != EOF)
 555       {
 556         input.getline(wxBuffer, 500);
 557   int len = strlen(wxBuffer);
 558   wxBuffer[len] = 13;
 559   wxBuffer[len+1] = 10;
 560   wxBuffer[len+2] = 0;
 561   strcpy(tmp_buffer+pos, wxBuffer);
 562   pos += strlen(wxBuffer);
 563   no_lines++;
 564       }
 565
 566 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 567       SetWindowText((HWND) GetHWND(), tmp_buffer);
 568       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 569       farfree(tmp_buffer);
 570
 571       return TRUE;
 572   }
 573   return FALSE;
 574 }
 575
 576 // If file is null, try saved file name first
 577 // Returns TRUE if succeeds.
 578 bool wxTextCtrl::SaveFile(const wxString& file)
 579 {
 580   wxString theFile(file);
 581   if (theFile == "")
 582     theFile = m_fileName;
 583   if (theFile == "")
 584     return FALSE;
 585   m_fileName = theFile;
 586
 587   ofstream output((char*) (const char*) theFile);
 588   if (output.bad())
 589   return FALSE;
 590
 591     // This will only save 64K max
 592     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 593     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 594     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 595     char *pstr = tmp_buffer;
 596
 597   // Convert \r\n to just \n
 598   while (*pstr)
 599   {
 600     if (*pstr != '\r')
 601       output << *pstr;
 602     pstr++;
 603   }
 604
 605     farfree(tmp_buffer);
 606     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 607
 608     return TRUE;
 609 }
 610
 611 void wxTextCtrl::WriteText(const wxString& text)
 612 {
 613     // Covert \n to \r\n
 614     int len = text.Length();
 615     char *newtext = new char[(len*2)+1];
 616     int i = 0;
 617     int j = 0;
 618     while (i < len)
 619     {
 620       if (text[i] == '\n')
 621       {
 622         newtext[j] = '\r';
 623         j ++;
 624       }
 625       newtext[j] = text[i];
 626       i ++;
 627       j ++;
 628     }
 629     newtext[j] = 0;
 630     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 631     delete[] newtext;
 632 }
 633
 634 void wxTextCtrl::Clear(void)
 635 {
 636 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 637     SetWindowText((HWND) GetHWND(), "");
 638 }
 639
 640 bool wxTextCtrl::IsModified(void) const
 641 {
 642     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 643 }
 644
 645 // Makes 'unmodified'
 646 void wxTextCtrl::DiscardEdits(void)
 647 {
 648   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 649 }
 650
 651 /*
 652  * Some of the following functions are yet to be implemented
 653  *
 654  */
 655
 656 int wxTextCtrl::GetNumberOfLines(void) const
 657 {
 658     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 659 }
 660
 661 long wxTextCtrl::XYToPosition(long x, long y) const
 662 {
 663     HWND hWnd = (HWND) GetHWND();
 664
 665     // This gets the char index for the _beginning_ of this line
 666     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 667     return (long)(x + charIndex);
 668 }
 669
 670 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 671 {
 672     HWND hWnd = (HWND) GetHWND();
 673
 674     // This gets the line number containing the character
 675     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 676     // This gets the char index for the _beginning_ of this line
 677     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 678     // The X position must therefore be the different between pos and charIndex
 679     *x = (long)(pos - charIndex);
 680     *y = (long)lineNo;
 681 }
 682
 683 void wxTextCtrl::ShowPosition(long pos)
 684 {
 685     HWND hWnd = (HWND) GetHWND();
 686
 687     // To scroll to a position, we pass the number of lines and characters
 688     // to scroll *by*. This means that we need to:
 689     // (1) Find the line position of the current line.
 690     // (2) Find the line position of pos.
 691     // (3) Scroll by (pos - current).
 692     // For now, ignore the horizontal scrolling.
 693
 694     // Is this where scrolling is relative to - the line containing the caret?
 695     // Or is the first visible line??? Try first visible line.
 696 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 697
 698     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 699
 700     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 701
 702     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 703
 704 /*
 705     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 706       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 707 */
 708
 709     if (linesToScroll != 0)
 710       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 711 }
 712
 713 int wxTextCtrl::GetLineLength(long lineNo) const
 714 {
 715     long charIndex = XYToPosition(0, lineNo);
 716     HWND hWnd = (HWND) GetHWND();
 717     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 718     return len;
 719 }
 720
 721 wxString wxTextCtrl::GetLineText(long lineNo) const
 722 {
 723     HWND hWnd = (HWND) GetHWND();
 724     *(WORD *)wxBuffer = 512;
 725     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 726     wxBuffer[noChars] = 0;
 727   return wxString(wxBuffer);
 728 }
 729
 730 /*
 731  * Text item
 732  */
 733
 734 void wxTextCtrl::Command(wxCommandEvent & event)
 735 {
 736   SetValue (event.GetString());
 737   ProcessCommand (event);
 738 }
 739
 740 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 741 {
 742   // By default, load the first file into the text window.
 743   if (event.GetNumberOfFiles() > 0)
 744   {
 745     LoadFile(event.GetFiles()[0]);
 746   }
 747 }
 748
 749 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 750 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 751
 752 //=========================================================================
 753 // Called then the buffer is full (gcc 2.6.3)
 754 // or when "endl" is output (Borland 4.5)
 755 //=========================================================================
 756 // Class declaration using multiple inheritance doesn't work properly for
 757 // Borland. See note in textctrl.h.
 758 #ifndef NO_TEXT_WINDOW_STREAM
 759 int wxTextCtrl::overflow(int c)
 760 {
 761   // Make sure there is a holding area
 762   // this is not needed in <iostream> usage as it automagically allocates
 763   // it, but does someone want to emulate it for safety's sake?
 764 #if wxUSE_IOSTREAMH
 765   if ( allocate()==EOF )
 766   {
 767     wxLogError("Streambuf allocation failed");
 768     return EOF;
 769   }
 770 #endif
 771
 772   // Verify that there are no characters in get area
 773   if ( gptr() && gptr() < egptr() )
 774   {
 775      wxError("Who's trespassing my get area?","Internal error");
 776      return EOF;
 777   }
 778
 779   // Reset get area
 780   setg(0,0,0);
 781
 782   // Make sure there is a put area
 783   if ( ! pptr() )
 784   {
 785 /* This doesn't seem to be fatal so comment out error message */
 786 //    wxError("Put area not opened","Internal error");
 787
 788 #if wxUSE_IOSTREAMH
 789           setp( base(), base() );
 790 #else
 791           setp( pbase(), pbase() );
 792 #endif
 793   }
 794
 795   // Determine how many characters have been inserted but no consumed
 796   int plen = pptr() - pbase();
 797
 798   // Now Jerry relies on the fact that the buffer is at least 2 chars
 799   // long, but the holding area "may be as small as 1" ???
 800   // And we need an additional \0, so let's keep this inefficient but
 801   // safe copy.
 802
 803   // If c!=EOF, it is a character that must also be comsumed
 804   int xtra = c==EOF? 0 : 1;
 805
 806   // Write temporary C-string to wxTextWindow
 807   {
 808   char *txt = new char[plen+xtra+1];
 809   memcpy(txt, pbase(), plen);
 810   txt[plen] = (char)c;     // append c
 811   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 812     // If the put area already contained \0, output will be truncated there
 813   WriteText(txt);
 814     delete[] txt;
 815   }
 816
 817   // Reset put area
 818   setp(pbase(), epptr());
 819
 820 #if defined(__WATCOMC__)
 821   return __NOT_EOF;
 822 #elif defined(zapeof)     // HP-UX (all cfront based?)
 823   return zapeof(c);
 824 #else
 825   return c!=EOF ? c : 0;  // this should make everybody happy
 826 #endif
 827
 828 /* OLD CODE
 829   int len = pptr() - pbase();
 830   char *txt = new char[len+1];
 831   strncpy(txt, pbase(), len);
 832   txt[len] = '\0';
 833   (*this) << txt;
 834   setp(pbase(), epptr());
 835   delete[] txt;
 836   return EOF;
 837 */
 838 }
 839
 840 //=========================================================================
 841 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 842 //=========================================================================
 843 int wxTextCtrl::sync(void)
 844 {
 845   // Verify that there are no characters in get area
 846   if ( gptr() && gptr() < egptr() )
 847   {
 848      wxError("Who's trespassing my get area?","Internal error");
 849      return EOF;
 850   }
 851
 852   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 853
 854   return 0;
 855 /* OLD CODE
 856   int len = pptr() - pbase();
 857   char *txt = new char[len+1];
 858   strncpy(txt, pbase(), len);
 859   txt[len] = '\0';
 860   (*this) << txt;
 861   setp(pbase(), epptr());
 862   delete[] txt;
 863   return 0;
 864 */
 865 }
 866
 867 //=========================================================================
 868 // Should not be called by a "ostream". Used by a "istream"
 869 //=========================================================================
 870 int wxTextCtrl::underflow(void)
 871 {
 872   return EOF;
 873 }
 874 #endif
 875
 876 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 877 {
 878   WriteText(s);
 879   return *this;
 880 }
 881
 882 wxTextCtrl& wxTextCtrl::operator<<(float f)
 883 {
 884     wxString str;
 885     str.Printf("%.2f", f);
 886     WriteText(str);
 887     return *this;
 888 }
 889
 890 wxTextCtrl& wxTextCtrl::operator<<(double d)
 891 {
 892     wxString str;
 893     str.Printf("%.2f", d);
 894     WriteText(str);
 895     return *this;
 896 }
 897
 898 wxTextCtrl& wxTextCtrl::operator<<(int i)
 899 {
 900     wxString str;
 901     str.Printf("%d", i);
 902     WriteText(str);
 903     return *this;
 904 }
 905
 906 wxTextCtrl& wxTextCtrl::operator<<(long i)
 907 {
 908     wxString str;
 909     str.Printf("%ld", i);
 910     WriteText(str);
 911     return *this;
 912 }
 913
 914 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 915 {
 916     char buf[2];
 917
 918     buf[0] = c;
 919     buf[1] = 0;
 920     WriteText(buf);
 921     return *this;
 922 }
 923
 924 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 925       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 926 {
 927 #if CTL3D
 928   if ( m_useCtl3D )
 929   {
 930     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 931     return (WXHBRUSH) hbrush;
 932   }
 933 #endif
 934
 935   if (GetParent()->GetTransparentBackground())
 936     SetBkMode((HDC) pDC, TRANSPARENT);
 937   else
 938     SetBkMode((HDC) pDC, OPAQUE);
 939
 940   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 941   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 942
 943   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 944
 945   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 946   // has a zero usage count.
 947   // NOT NOW - will be cleaned up at end of app.
 948 //  backgroundBrush->RealizeResource();
 949   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 950 }
 951
 952 void wxTextCtrl::OnChar(wxKeyEvent& event)
 953 {
 954     // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 955   switch(event.KeyCode())
 956   {
 957   case '{':
 958   case '}':
 959   case '[':
 960   case ']':
 961   case '|':
 962   case '~':
 963   case '\\':
 964    {
 965     char c=(char)event.KeyCode();
 966     *this << c;
 967    }
 968    break;
 969   }
 970   if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 971   {
 972     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 973     event.SetEventObject( this );
 974     if ( GetEventHandler()->ProcessEvent(event) )
 975       return;
 976   }
 977   else if ( event.KeyCode() == WXK_TAB ) {
 978     wxNavigationKeyEvent event;
 979     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 980     event.SetWindowChange(FALSE);
 981     event.SetEventObject(this);
 982
 983     if ( GetEventHandler()->ProcessEvent(event) )
 984       return;
 985   }
 986
 987   event.Skip();
 988 }
 989
 990 long wxTextCtrl::MSWGetDlgCode()
 991 {
 992   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 993   if ( m_windowStyle & wxTE_PROCESS_ENTER )
 994     lRc |= DLGC_WANTMESSAGE;
 995   else if ( m_windowStyle & wxTE_MULTILINE )
 996     lRc |= DLGC_WANTMESSAGE;
 997   // ??
 998   if ( m_windowStyle & wxTE_PROCESS_TAB )
 999     lRc |= DLGC_WANTTAB;
1000
1001   return lRc;
1002 }
1003
1004 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1005 {
1006     if ( m_windowStyle & wxTE_MULTILINE )
1007     {
1008         // No flicker - only problem is we probably can't change the background
1009         Default();
1010 /*
1011         RECT rect;
1012         ::GetClientRect((HWND) GetHWND(), &rect);
1013
1014         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1015         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1016
1017         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1018         ::DeleteObject(hBrush);
1019         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1020 */
1021     }
1022 //        wxWindow::OnEraseBackground(event);
1023 }
1024
1025 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1026 {
1027 /*
1028   // Debugging
1029   wxDebugMsg("Edit control %d: ", (int)id);
1030   switch (param)
1031   {
1032     case EN_SETFOCUS:
1033       wxDebugMsg("EN_SETFOCUS\n");
1034       break;
1035     case EN_KILLFOCUS:
1036       wxDebugMsg("EN_KILLFOCUS\n");
1037       break;
1038     case EN_CHANGE:
1039       wxDebugMsg("EN_CHANGE\n");
1040       break;
1041     case EN_UPDATE:
1042       wxDebugMsg("EN_UPDATE\n");
1043       break;
1044     case EN_ERRSPACE:
1045       wxDebugMsg("EN_ERRSPACE\n");
1046       break;
1047     case EN_MAXTEXT:
1048       wxDebugMsg("EN_MAXTEXT\n");
1049       break;
1050     case EN_HSCROLL:
1051       wxDebugMsg("EN_HSCROLL\n");
1052       break;
1053     case EN_VSCROLL:
1054       wxDebugMsg("EN_VSCROLL\n");
1055       break;
1056     default:
1057       wxDebugMsg("Unknown EDIT notification\n");
1058       break;
1059   }
1060 */
1061   switch (param)
1062   {
1063     case EN_SETFOCUS:
1064     case EN_KILLFOCUS:
1065       {
1066         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1067                                                  : wxEVT_SET_FOCUS,
1068                            m_windowId);
1069         event.SetEventObject( this );
1070         GetEventHandler()->ProcessEvent(event);
1071       }
1072       break;
1073
1074     case EN_CHANGE:
1075       {
1076         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1077         wxString val(GetValue());
1078         if ( !val.IsNull() )
1079           event.m_commandString = WXSTRINGCAST val;
1080         event.SetEventObject( this );
1081         ProcessCommand(event);
1082       }
1083       break;
1084
1085     // the other notification messages are not processed
1086     case EN_UPDATE:
1087     case EN_ERRSPACE:
1088     case EN_MAXTEXT:
1089     case EN_HSCROLL:
1090     case EN_VSCROLL:
1091     default:
1092       return FALSE;
1093   }
1094
1095   // processed
1096   return TRUE;
1097 }
1098
1099
1100 // For Rich Edit controls. Do we need it?
1101 #if 0
1102 #if defined(__WIN95__)
1103 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1104 {
1105   wxCommandEvent event(0, m_windowId);
1106   int eventType = 0;
1107   NMHDR *hdr1 = (NMHDR *) lParam;
1108   switch ( hdr1->code )
1109   {
1110     // Insert case code here
1111     default :
1112       return wxControl::MSWNotify(wParam, lParam);
1113       break;
1114   }
1115
1116   event.SetEventObject( this );
1117   event.SetEventType(eventType);
1118
1119   if ( !GetEventHandler()->ProcessEvent(event) )
1120     return FALSE;
1121
1122     return TRUE;
1123 }
1124 #endif
1125 #endif
1126