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)linesToScroll);
 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 bool wxTextCtrl::CanCopy() const
 733 {
 734     // Can copy if there's a selection
 735     long from, to;
 736     GetSelection(& from, & to);
 737     return (from != to) ;
 738 }
 739
 740 bool wxTextCtrl::CanCut() const
 741 {
 742     // Can cut if there's a selection
 743     long from, to;
 744     GetSelection(& from, & to);
 745     return (from != to) ;
 746 }
 747
 748 bool wxTextCtrl::CanPaste() const
 749 {
 750     int dataFormat = 0; // 0 == any format
 751     return (::SendMessage( (HWND) GetHWND(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 752 }
 753
 754 // Undo/redo
 755 void wxTextCtrl::Undo()
 756 {
 757     if (CanUndo())
 758     {
 759         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 760     }
 761 }
 762
 763 void wxTextCtrl::Redo()
 764 {
 765     if (CanRedo())
 766     {
 767         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 768         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 769     }
 770 }
 771
 772 bool wxTextCtrl::CanUndo() const
 773 {
 774     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 775 }
 776
 777 bool wxTextCtrl::CanRedo() const
 778 {
 779     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 780 }
 781
 782 // If the return values from and to are the same, there is no
 783 // selection.
 784 void wxTextCtrl::GetSelection(long* from, long* to) const
 785 {
 786 #if wxUSE_RICHEDIT
 787     if (m_isRich)
 788     {
 789         CHARRANGE charRange;
 790         ::SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 791
 792         *from = charRange.cpMin;
 793         *to = charRange.cpMax;
 794
 795         return;
 796     }
 797 #endif
 798     DWORD dwStart, dwEnd;
 799     WPARAM wParam = (WPARAM) (DWORD*) dwStart; // receives starting position
 800     LPARAM lParam = (LPARAM) (DWORD*) dwEnd;   // receives ending position
 801
 802     ::SendMessage((HWND) GetHWND(), EM_GETSEL, wParam, lParam);
 803
 804     *from = dwStart;
 805     *to = dwEnd;
 806 }
 807
 808 bool wxTextCtrl::IsEditable() const
 809 {
 810     long style = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
 811     return ((style & ES_READONLY) == 0);
 812 }
 813
 814 void wxTextCtrl::Command(wxCommandEvent & event)
 815 {
 816   SetValue (event.GetString());
 817   ProcessCommand (event);
 818 }
 819
 820 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 821 {
 822   // By default, load the first file into the text window.
 823   if (event.GetNumberOfFiles() > 0)
 824   {
 825     LoadFile(event.GetFiles()[0]);
 826   }
 827 }
 828
 829 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 830 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 831
 832 //=========================================================================
 833 // Called then the buffer is full (gcc 2.6.3)
 834 // or when "endl" is output (Borland 4.5)
 835 //=========================================================================
 836 // Class declaration using multiple inheritance doesn't work properly for
 837 // Borland. See note in textctrl.h.
 838 #ifndef NO_TEXT_WINDOW_STREAM
 839 int wxTextCtrl::overflow(int c)
 840 {
 841   // Make sure there is a holding area
 842   // this is not needed in <iostream> usage as it automagically allocates
 843   // it, but does someone want to emulate it for safety's sake?
 844 #if wxUSE_IOSTREAMH
 845   if ( allocate()==EOF )
 846   {
 847     wxLogError("Streambuf allocation failed");
 848     return EOF;
 849   }
 850 #endif
 851
 852   // Verify that there are no characters in get area
 853   if ( gptr() && gptr() < egptr() )
 854   {
 855      wxError("Who's trespassing my get area?","Internal error");
 856      return EOF;
 857   }
 858
 859   // Reset get area
 860   setg(0,0,0);
 861
 862   // Make sure there is a put area
 863   if ( ! pptr() )
 864   {
 865 /* This doesn't seem to be fatal so comment out error message */
 866 //    wxError("Put area not opened","Internal error");
 867
 868 #if wxUSE_IOSTREAMH
 869           setp( base(), base() );
 870 #else
 871           setp( pbase(), pbase() );
 872 #endif
 873   }
 874
 875   // Determine how many characters have been inserted but no consumed
 876   int plen = pptr() - pbase();
 877
 878   // Now Jerry relies on the fact that the buffer is at least 2 chars
 879   // long, but the holding area "may be as small as 1" ???
 880   // And we need an additional \0, so let's keep this inefficient but
 881   // safe copy.
 882
 883   // If c!=EOF, it is a character that must also be comsumed
 884   int xtra = c==EOF? 0 : 1;
 885
 886   // Write temporary C-string to wxTextWindow
 887   {
 888   char *txt = new char[plen+xtra+1];
 889   memcpy(txt, pbase(), plen);
 890   txt[plen] = (char)c;     // append c
 891   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 892     // If the put area already contained \0, output will be truncated there
 893   AppendText(txt);
 894     delete[] txt;
 895   }
 896
 897   // Reset put area
 898   setp(pbase(), epptr());
 899
 900 #if defined(__WATCOMC__)
 901   return __NOT_EOF;
 902 #elif defined(zapeof)     // HP-UX (all cfront based?)
 903   return zapeof(c);
 904 #else
 905   return c!=EOF ? c : 0;  // this should make everybody happy
 906 #endif
 907
 908 /* OLD CODE
 909   int len = pptr() - pbase();
 910   char *txt = new char[len+1];
 911   strncpy(txt, pbase(), len);
 912   txt[len] = '\0';
 913   (*this) << txt;
 914   setp(pbase(), epptr());
 915   delete[] txt;
 916   return EOF;
 917 */
 918 }
 919
 920 //=========================================================================
 921 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 922 //=========================================================================
 923 int wxTextCtrl::sync()
 924 {
 925   // Verify that there are no characters in get area
 926   if ( gptr() && gptr() < egptr() )
 927   {
 928      wxError("Who's trespassing my get area?","Internal error");
 929      return EOF;
 930   }
 931
 932   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 933
 934   return 0;
 935 /* OLD CODE
 936   int len = pptr() - pbase();
 937   char *txt = new char[len+1];
 938   strncpy(txt, pbase(), len);
 939   txt[len] = '\0';
 940   (*this) << txt;
 941   setp(pbase(), epptr());
 942   delete[] txt;
 943   return 0;
 944 */
 945 }
 946
 947 //=========================================================================
 948 // Should not be called by a "ostream". Used by a "istream"
 949 //=========================================================================
 950 int wxTextCtrl::underflow()
 951 {
 952   return EOF;
 953 }
 954 #endif
 955
 956 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 957 {
 958     AppendText(s);
 959     return *this;
 960 }
 961
 962 wxTextCtrl& wxTextCtrl::operator<<(float f)
 963 {
 964     wxString str;
 965     str.Printf("%.2f", f);
 966     AppendText(str);
 967     return *this;
 968 }
 969
 970 wxTextCtrl& wxTextCtrl::operator<<(double d)
 971 {
 972     wxString str;
 973     str.Printf("%.2f", d);
 974     AppendText(str);
 975     return *this;
 976 }
 977
 978 wxTextCtrl& wxTextCtrl::operator<<(int i)
 979 {
 980     wxString str;
 981     str.Printf("%d", i);
 982     AppendText(str);
 983     return *this;
 984 }
 985
 986 wxTextCtrl& wxTextCtrl::operator<<(long i)
 987 {
 988     wxString str;
 989     str.Printf("%ld", i);
 990     AppendText(str);
 991     return *this;
 992 }
 993
 994 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 995 {
 996     char buf[2];
 997
 998     buf[0] = c;
 999     buf[1] = 0;
1000     AppendText(buf);
1001     return *this;
1002 }
1003
1004 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1005       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1006 {
1007 #if wxUSE_CTL3D
1008   if ( m_useCtl3D )
1009   {
1010     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1011     return (WXHBRUSH) hbrush;
1012   }
1013 #endif
1014
1015   if (GetParent()->GetTransparentBackground())
1016     SetBkMode((HDC) pDC, TRANSPARENT);
1017   else
1018     SetBkMode((HDC) pDC, OPAQUE);
1019
1020   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1021   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1022
1023   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1024
1025   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1026   // has a zero usage count.
1027   // NOT NOW - will be cleaned up at end of app.
1028 //  backgroundBrush->RealizeResource();
1029   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1030 }
1031
1032 void wxTextCtrl::OnChar(wxKeyEvent& event)
1033 {
1034     switch( event.KeyCode() )
1035     {
1036         case WXK_RETURN:
1037             if ( !(m_windowStyle & wxTE_MULTILINE) )
1038             {
1039                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1040                 event.SetEventObject( this );
1041                 if ( GetEventHandler()->ProcessEvent(event) )
1042                     return;
1043             }
1044             //else: multiline controls need Enter for themselves
1045
1046             break;
1047
1048         case WXK_TAB:
1049             // only produce navigation event if we don't process TAB ourself or
1050             // if it's a Shift-Tab keypress (we assume nobody will ever need
1051             // this key combo for himself)
1052             //
1053             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1054             //     handled by Windows
1055             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
1056             {
1057                 wxNavigationKeyEvent eventNav;
1058                 eventNav.SetDirection(!event.ShiftDown());
1059                 eventNav.SetWindowChange(FALSE);
1060                 eventNav.SetEventObject(this);
1061
1062                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1063                     return;
1064             }
1065             break;
1066
1067         default:
1068             event.Skip();
1069             return;
1070     }
1071
1072     // don't just call event.Skip() because this will cause TABs and ENTERs
1073     // be passed upwards and we don't always want this - instead process it
1074     // right here
1075     Default();
1076 //    event.Skip();
1077 }
1078
1079 long wxTextCtrl::MSWGetDlgCode()
1080 {
1081     // we always want the characters and the arrows
1082     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1083
1084     // we may have several different cases:
1085     // 1. normal case: both TAB and ENTER are used for dialog navigation
1086     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1087     //    control in the dialog
1088     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1089     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1090     //    the next control
1091     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1092         lRc |= DLGC_WANTMESSAGE;
1093     if ( m_windowStyle & wxTE_PROCESS_TAB )
1094         lRc |= DLGC_WANTTAB;
1095
1096     return lRc;
1097 }
1098
1099 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1100 {
1101     if ( m_windowStyle & wxTE_MULTILINE )
1102     {
1103         // No flicker - only problem is we probably can't change the background
1104         Default();
1105 /*
1106         RECT rect;
1107         ::GetClientRect((HWND) GetHWND(), &rect);
1108
1109         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1110         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1111
1112         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1113         ::DeleteObject(hBrush);
1114         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1115 */
1116     }
1117 //        wxWindow::OnEraseBackground(event);
1118 }
1119
1120 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1121 {
1122 /*
1123   // Debugging
1124   wxDebugMsg("Edit control %d: ", (int)id);
1125   switch (param)
1126   {
1127     case EN_SETFOCUS:
1128       wxDebugMsg("EN_SETFOCUS\n");
1129       break;
1130     case EN_KILLFOCUS:
1131       wxDebugMsg("EN_KILLFOCUS\n");
1132       break;
1133     case EN_CHANGE:
1134       wxDebugMsg("EN_CHANGE\n");
1135       break;
1136     case EN_UPDATE:
1137       wxDebugMsg("EN_UPDATE\n");
1138       break;
1139     case EN_ERRSPACE:
1140       wxDebugMsg("EN_ERRSPACE\n");
1141       break;
1142     case EN_MAXTEXT:
1143       wxDebugMsg("EN_MAXTEXT\n");
1144       break;
1145     case EN_HSCROLL:
1146       wxDebugMsg("EN_HSCROLL\n");
1147       break;
1148     case EN_VSCROLL:
1149       wxDebugMsg("EN_VSCROLL\n");
1150       break;
1151     default:
1152       wxDebugMsg("Unknown EDIT notification\n");
1153       break;
1154   }
1155 */
1156   switch (param)
1157   {
1158     case EN_SETFOCUS:
1159     case EN_KILLFOCUS:
1160       {
1161         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1162                                                  : wxEVT_SET_FOCUS,
1163                            m_windowId);
1164         event.SetEventObject( this );
1165         GetEventHandler()->ProcessEvent(event);
1166       }
1167       break;
1168
1169     case EN_CHANGE:
1170       {
1171         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1172         wxString val(GetValue());
1173         if ( !val.IsNull() )
1174           event.m_commandString = WXSTRINGCAST val;
1175         event.SetEventObject( this );
1176         ProcessCommand(event);
1177       }
1178       break;
1179
1180     // the other notification messages are not processed
1181     case EN_UPDATE:
1182     case EN_ERRSPACE:
1183     case EN_MAXTEXT:
1184     case EN_HSCROLL:
1185     case EN_VSCROLL:
1186     default:
1187       return FALSE;
1188   }
1189
1190   // processed
1191   return TRUE;
1192 }
1193
1194
1195 // For Rich Edit controls. Do we need it?
1196 #if 0
1197 #if wxUSE_RICHEDIT
1198 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1199 {
1200   wxCommandEvent event(0, m_windowId);
1201   int eventType = 0;
1202   NMHDR *hdr1 = (NMHDR *) lParam;
1203   switch ( hdr1->code )
1204   {
1205     // Insert case code here
1206     default :
1207       return wxControl::MSWNotify(wParam, lParam);
1208       break;
1209   }
1210
1211   event.SetEventObject( this );
1212   event.SetEventType(eventType);
1213
1214   if ( !GetEventHandler()->ProcessEvent(event) )
1215     return FALSE;
1216
1217     return TRUE;
1218 }
1219 #endif
1220 #endif
1221