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