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 /*
 713     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 714       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 715 */
 716
 717     if (linesToScroll != 0)
 718       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 719 }
 720
 721 int wxTextCtrl::GetLineLength(long lineNo) const
 722 {
 723     long charIndex = XYToPosition(0, lineNo);
 724     HWND hWnd = (HWND) GetHWND();
 725     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 726     return len;
 727 }
 728
 729 wxString wxTextCtrl::GetLineText(long lineNo) const
 730 {
 731     HWND hWnd = (HWND) GetHWND();
 732     *(WORD *)wxBuffer = 512;
 733     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 734     wxBuffer[noChars] = 0;
 735   return wxString(wxBuffer);
 736 }
 737
 738 /*
 739  * Text item
 740  */
 741
 742 void wxTextCtrl::Command(wxCommandEvent & event)
 743 {
 744   SetValue (event.GetString());
 745   ProcessCommand (event);
 746 }
 747
 748 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 749 {
 750   // By default, load the first file into the text window.
 751   if (event.GetNumberOfFiles() > 0)
 752   {
 753     LoadFile(event.GetFiles()[0]);
 754   }
 755 }
 756
 757 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 758 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 759
 760 //=========================================================================
 761 // Called then the buffer is full (gcc 2.6.3)
 762 // or when "endl" is output (Borland 4.5)
 763 //=========================================================================
 764 // Class declaration using multiple inheritance doesn't work properly for
 765 // Borland. See note in textctrl.h.
 766 #ifndef NO_TEXT_WINDOW_STREAM
 767 int wxTextCtrl::overflow(int c)
 768 {
 769   // Make sure there is a holding area
 770   // this is not needed in <iostream> usage as it automagically allocates
 771   // it, but does someone want to emulate it for safety's sake?
 772 #if wxUSE_IOSTREAMH
 773   if ( allocate()==EOF )
 774   {
 775     wxLogError("Streambuf allocation failed");
 776     return EOF;
 777   }
 778 #endif
 779
 780   // Verify that there are no characters in get area
 781   if ( gptr() && gptr() < egptr() )
 782   {
 783      wxError("Who's trespassing my get area?","Internal error");
 784      return EOF;
 785   }
 786
 787   // Reset get area
 788   setg(0,0,0);
 789
 790   // Make sure there is a put area
 791   if ( ! pptr() )
 792   {
 793 /* This doesn't seem to be fatal so comment out error message */
 794 //    wxError("Put area not opened","Internal error");
 795
 796 #if wxUSE_IOSTREAMH
 797           setp( base(), base() );
 798 #else
 799           setp( pbase(), pbase() );
 800 #endif
 801   }
 802
 803   // Determine how many characters have been inserted but no consumed
 804   int plen = pptr() - pbase();
 805
 806   // Now Jerry relies on the fact that the buffer is at least 2 chars
 807   // long, but the holding area "may be as small as 1" ???
 808   // And we need an additional \0, so let's keep this inefficient but
 809   // safe copy.
 810
 811   // If c!=EOF, it is a character that must also be comsumed
 812   int xtra = c==EOF? 0 : 1;
 813
 814   // Write temporary C-string to wxTextWindow
 815   {
 816   char *txt = new char[plen+xtra+1];
 817   memcpy(txt, pbase(), plen);
 818   txt[plen] = (char)c;     // append c
 819   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 820     // If the put area already contained \0, output will be truncated there
 821   AppendText(txt);
 822     delete[] txt;
 823   }
 824
 825   // Reset put area
 826   setp(pbase(), epptr());
 827
 828 #if defined(__WATCOMC__)
 829   return __NOT_EOF;
 830 #elif defined(zapeof)     // HP-UX (all cfront based?)
 831   return zapeof(c);
 832 #else
 833   return c!=EOF ? c : 0;  // this should make everybody happy
 834 #endif
 835
 836 /* OLD CODE
 837   int len = pptr() - pbase();
 838   char *txt = new char[len+1];
 839   strncpy(txt, pbase(), len);
 840   txt[len] = '\0';
 841   (*this) << txt;
 842   setp(pbase(), epptr());
 843   delete[] txt;
 844   return EOF;
 845 */
 846 }
 847
 848 //=========================================================================
 849 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 850 //=========================================================================
 851 int wxTextCtrl::sync()
 852 {
 853   // Verify that there are no characters in get area
 854   if ( gptr() && gptr() < egptr() )
 855   {
 856      wxError("Who's trespassing my get area?","Internal error");
 857      return EOF;
 858   }
 859
 860   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 861
 862   return 0;
 863 /* OLD CODE
 864   int len = pptr() - pbase();
 865   char *txt = new char[len+1];
 866   strncpy(txt, pbase(), len);
 867   txt[len] = '\0';
 868   (*this) << txt;
 869   setp(pbase(), epptr());
 870   delete[] txt;
 871   return 0;
 872 */
 873 }
 874
 875 //=========================================================================
 876 // Should not be called by a "ostream". Used by a "istream"
 877 //=========================================================================
 878 int wxTextCtrl::underflow()
 879 {
 880   return EOF;
 881 }
 882 #endif
 883
 884 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 885 {
 886     AppendText(s);
 887     return *this;
 888 }
 889
 890 wxTextCtrl& wxTextCtrl::operator<<(float f)
 891 {
 892     wxString str;
 893     str.Printf("%.2f", f);
 894     AppendText(str);
 895     return *this;
 896 }
 897
 898 wxTextCtrl& wxTextCtrl::operator<<(double d)
 899 {
 900     wxString str;
 901     str.Printf("%.2f", d);
 902     AppendText(str);
 903     return *this;
 904 }
 905
 906 wxTextCtrl& wxTextCtrl::operator<<(int i)
 907 {
 908     wxString str;
 909     str.Printf("%d", i);
 910     AppendText(str);
 911     return *this;
 912 }
 913
 914 wxTextCtrl& wxTextCtrl::operator<<(long i)
 915 {
 916     wxString str;
 917     str.Printf("%ld", i);
 918     AppendText(str);
 919     return *this;
 920 }
 921
 922 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 923 {
 924     char buf[2];
 925
 926     buf[0] = c;
 927     buf[1] = 0;
 928     AppendText(buf);
 929     return *this;
 930 }
 931
 932 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 933       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 934 {
 935 #if wxUSE_CTL3D
 936   if ( m_useCtl3D )
 937   {
 938     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 939     return (WXHBRUSH) hbrush;
 940   }
 941 #endif
 942
 943   if (GetParent()->GetTransparentBackground())
 944     SetBkMode((HDC) pDC, TRANSPARENT);
 945   else
 946     SetBkMode((HDC) pDC, OPAQUE);
 947
 948   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 949   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 950
 951   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 952
 953   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 954   // has a zero usage count.
 955   // NOT NOW - will be cleaned up at end of app.
 956 //  backgroundBrush->RealizeResource();
 957   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 958 }
 959
 960 void wxTextCtrl::OnChar(wxKeyEvent& event)
 961 {
 962     switch( event.KeyCode() )
 963     {
 964         // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 965         case '{':
 966         case '}':
 967         case '[':
 968         case ']':
 969         case '|':
 970         case '~':
 971         case '\\':
 972             {
 973                 char c = (char)event.KeyCode();
 974                 *this << c;
 975             }
 976             break;
 977
 978         case WXK_RETURN:
 979             wxASSERT_MSG( m_windowStyle & wxTE_PROCESS_ENTER,
 980                           "this text ctrl should never receive return" );
 981             if ( m_windowStyle & wxTE_MULTILINE == 0 )
 982             {
 983                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 984                 event.SetEventObject( this );
 985                 if ( GetEventHandler()->ProcessEvent(event) )
 986                     return;
 987             }
 988             //else: multiline controls need Enter for themselves
 989
 990             break;
 991
 992         case WXK_TAB:
 993             // only produce navigation event if we don't process TAB ourself or
 994             // if it's a Shift-Tab keypress (we assume nobody will ever need
 995             // this key combo for himself)
 996             //
 997             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
 998             //     handled by Windows
 999             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
1000             {
1001                 wxNavigationKeyEvent eventNav;
1002                 eventNav.SetDirection(!event.ShiftDown());
1003                 eventNav.SetWindowChange(FALSE);
1004                 eventNav.SetEventObject(this);
1005
1006                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1007                     return;
1008             }
1009     }
1010
1011     // don't just call event.Skip() because this will cause TABs and ENTERs
1012     // be passed upwards and we don't always want this - instead process it
1013     // right here
1014     Default();
1015 }
1016
1017 long wxTextCtrl::MSWGetDlgCode()
1018 {
1019     // we always want the characters and the arrows
1020     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1021
1022     // we may have several different cases:
1023     // 1. normal case: both TAB and ENTER are used for dialog navigation
1024     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1025     //    control in the dialog
1026     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1027     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1028     //    the next control
1029     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1030         lRc |= DLGC_WANTMESSAGE;
1031     if ( m_windowStyle & wxTE_PROCESS_TAB )
1032         lRc |= DLGC_WANTTAB;
1033
1034     return lRc;
1035 }
1036
1037 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1038 {
1039     if ( m_windowStyle & wxTE_MULTILINE )
1040     {
1041         // No flicker - only problem is we probably can't change the background
1042         Default();
1043 /*
1044         RECT rect;
1045         ::GetClientRect((HWND) GetHWND(), &rect);
1046
1047         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1048         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1049
1050         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1051         ::DeleteObject(hBrush);
1052         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1053 */
1054     }
1055 //        wxWindow::OnEraseBackground(event);
1056 }
1057
1058 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1059 {
1060 /*
1061   // Debugging
1062   wxDebugMsg("Edit control %d: ", (int)id);
1063   switch (param)
1064   {
1065     case EN_SETFOCUS:
1066       wxDebugMsg("EN_SETFOCUS\n");
1067       break;
1068     case EN_KILLFOCUS:
1069       wxDebugMsg("EN_KILLFOCUS\n");
1070       break;
1071     case EN_CHANGE:
1072       wxDebugMsg("EN_CHANGE\n");
1073       break;
1074     case EN_UPDATE:
1075       wxDebugMsg("EN_UPDATE\n");
1076       break;
1077     case EN_ERRSPACE:
1078       wxDebugMsg("EN_ERRSPACE\n");
1079       break;
1080     case EN_MAXTEXT:
1081       wxDebugMsg("EN_MAXTEXT\n");
1082       break;
1083     case EN_HSCROLL:
1084       wxDebugMsg("EN_HSCROLL\n");
1085       break;
1086     case EN_VSCROLL:
1087       wxDebugMsg("EN_VSCROLL\n");
1088       break;
1089     default:
1090       wxDebugMsg("Unknown EDIT notification\n");
1091       break;
1092   }
1093 */
1094   switch (param)
1095   {
1096     case EN_SETFOCUS:
1097     case EN_KILLFOCUS:
1098       {
1099         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1100                                                  : wxEVT_SET_FOCUS,
1101                            m_windowId);
1102         event.SetEventObject( this );
1103         GetEventHandler()->ProcessEvent(event);
1104       }
1105       break;
1106
1107     case EN_CHANGE:
1108       {
1109         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1110         wxString val(GetValue());
1111         if ( !val.IsNull() )
1112           event.m_commandString = WXSTRINGCAST val;
1113         event.SetEventObject( this );
1114         ProcessCommand(event);
1115       }
1116       break;
1117
1118     // the other notification messages are not processed
1119     case EN_UPDATE:
1120     case EN_ERRSPACE:
1121     case EN_MAXTEXT:
1122     case EN_HSCROLL:
1123     case EN_VSCROLL:
1124     default:
1125       return FALSE;
1126   }
1127
1128   // processed
1129   return TRUE;
1130 }
1131
1132
1133 // For Rich Edit controls. Do we need it?
1134 #if 0
1135 #if wxUSE_RICHEDIT
1136 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1137 {
1138   wxCommandEvent event(0, m_windowId);
1139   int eventType = 0;
1140   NMHDR *hdr1 = (NMHDR *) lParam;
1141   switch ( hdr1->code )
1142   {
1143     // Insert case code here
1144     default :
1145       return wxControl::MSWNotify(wParam, lParam);
1146       break;
1147   }
1148
1149   event.SetEventObject( this );
1150   event.SetEventType(eventType);
1151
1152   if ( !GetEventHandler()->ProcessEvent(event) )
1153     return FALSE;
1154
1155     return TRUE;
1156 }
1157 #endif
1158 #endif
1159