src/msw/textctrl.cpp

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