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 #if wxUSE_RICHEDIT
 751     if (m_isRich)
 752     {
 753         int dataFormat = 0; // 0 == any format
 754         return (::SendMessage( (HWND) GetHWND(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 755     }
 756 #endif
 757     if (!IsEditable())
 758         return FALSE;
 759
 760     // Standard edit control: check for straight text on clipboard
 761     bool isTextAvailable = FALSE;
 762     if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
 763     {
 764         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 765         ::CloseClipboard();
 766     }
 767     return isTextAvailable;
 768 }
 769
 770 // Undo/redo
 771 void wxTextCtrl::Undo()
 772 {
 773     if (CanUndo())
 774     {
 775         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 776     }
 777 }
 778
 779 void wxTextCtrl::Redo()
 780 {
 781     if (CanRedo())
 782     {
 783         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 784         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 785     }
 786 }
 787
 788 bool wxTextCtrl::CanUndo() const
 789 {
 790     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 791 }
 792
 793 bool wxTextCtrl::CanRedo() const
 794 {
 795     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 796 }
 797
 798 // If the return values from and to are the same, there is no
 799 // selection.
 800 void wxTextCtrl::GetSelection(long* from, long* to) const
 801 {
 802 #if wxUSE_RICHEDIT
 803     if (m_isRich)
 804     {
 805         CHARRANGE charRange;
 806         ::SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 807
 808         *from = charRange.cpMin;
 809         *to = charRange.cpMax;
 810
 811         return;
 812     }
 813 #endif
 814     DWORD dwStart, dwEnd;
 815     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 816     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 817
 818     ::SendMessage((HWND) GetHWND(), EM_GETSEL, wParam, lParam);
 819
 820     *from = dwStart;
 821     *to = dwEnd;
 822 }
 823
 824 bool wxTextCtrl::IsEditable() const
 825 {
 826     long style = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
 827     return ((style & ES_READONLY) == 0);
 828 }
 829
 830 void wxTextCtrl::Command(wxCommandEvent & event)
 831 {
 832   SetValue (event.GetString());
 833   ProcessCommand (event);
 834 }
 835
 836 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 837 {
 838   // By default, load the first file into the text window.
 839   if (event.GetNumberOfFiles() > 0)
 840   {
 841     LoadFile(event.GetFiles()[0]);
 842   }
 843 }
 844
 845 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 846 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 847
 848 //=========================================================================
 849 // Called then the buffer is full (gcc 2.6.3)
 850 // or when "endl" is output (Borland 4.5)
 851 //=========================================================================
 852 // Class declaration using multiple inheritance doesn't work properly for
 853 // Borland. See note in textctrl.h.
 854 #ifndef NO_TEXT_WINDOW_STREAM
 855 int wxTextCtrl::overflow(int c)
 856 {
 857   // Make sure there is a holding area
 858   // this is not needed in <iostream> usage as it automagically allocates
 859   // it, but does someone want to emulate it for safety's sake?
 860 #if wxUSE_IOSTREAMH
 861   if ( allocate()==EOF )
 862   {
 863     wxLogError("Streambuf allocation failed");
 864     return EOF;
 865   }
 866 #endif
 867
 868   // Verify that there are no characters in get area
 869   if ( gptr() && gptr() < egptr() )
 870   {
 871      wxError("Who's trespassing my get area?","Internal error");
 872      return EOF;
 873   }
 874
 875   // Reset get area
 876   setg(0,0,0);
 877
 878   // Make sure there is a put area
 879   if ( ! pptr() )
 880   {
 881 /* This doesn't seem to be fatal so comment out error message */
 882 //    wxError("Put area not opened","Internal error");
 883
 884 #if wxUSE_IOSTREAMH
 885           setp( base(), base() );
 886 #else
 887           setp( pbase(), pbase() );
 888 #endif
 889   }
 890
 891   // Determine how many characters have been inserted but no consumed
 892   int plen = pptr() - pbase();
 893
 894   // Now Jerry relies on the fact that the buffer is at least 2 chars
 895   // long, but the holding area "may be as small as 1" ???
 896   // And we need an additional \0, so let's keep this inefficient but
 897   // safe copy.
 898
 899   // If c!=EOF, it is a character that must also be comsumed
 900   int xtra = c==EOF? 0 : 1;
 901
 902   // Write temporary C-string to wxTextWindow
 903   {
 904   char *txt = new char[plen+xtra+1];
 905   memcpy(txt, pbase(), plen);
 906   txt[plen] = (char)c;     // append c
 907   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 908     // If the put area already contained \0, output will be truncated there
 909   AppendText(txt);
 910     delete[] txt;
 911   }
 912
 913   // Reset put area
 914   setp(pbase(), epptr());
 915
 916 #if defined(__WATCOMC__)
 917   return __NOT_EOF;
 918 #elif defined(zapeof)     // HP-UX (all cfront based?)
 919   return zapeof(c);
 920 #else
 921   return c!=EOF ? c : 0;  // this should make everybody happy
 922 #endif
 923
 924 /* OLD CODE
 925   int len = pptr() - pbase();
 926   char *txt = new char[len+1];
 927   strncpy(txt, pbase(), len);
 928   txt[len] = '\0';
 929   (*this) << txt;
 930   setp(pbase(), epptr());
 931   delete[] txt;
 932   return EOF;
 933 */
 934 }
 935
 936 //=========================================================================
 937 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 938 //=========================================================================
 939 int wxTextCtrl::sync()
 940 {
 941   // Verify that there are no characters in get area
 942   if ( gptr() && gptr() < egptr() )
 943   {
 944      wxError("Who's trespassing my get area?","Internal error");
 945      return EOF;
 946   }
 947
 948   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 949
 950   return 0;
 951 /* OLD CODE
 952   int len = pptr() - pbase();
 953   char *txt = new char[len+1];
 954   strncpy(txt, pbase(), len);
 955   txt[len] = '\0';
 956   (*this) << txt;
 957   setp(pbase(), epptr());
 958   delete[] txt;
 959   return 0;
 960 */
 961 }
 962
 963 //=========================================================================
 964 // Should not be called by a "ostream". Used by a "istream"
 965 //=========================================================================
 966 int wxTextCtrl::underflow()
 967 {
 968   return EOF;
 969 }
 970 #endif
 971
 972 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 973 {
 974     AppendText(s);
 975     return *this;
 976 }
 977
 978 wxTextCtrl& wxTextCtrl::operator<<(float f)
 979 {
 980     wxString str;
 981     str.Printf("%.2f", f);
 982     AppendText(str);
 983     return *this;
 984 }
 985
 986 wxTextCtrl& wxTextCtrl::operator<<(double d)
 987 {
 988     wxString str;
 989     str.Printf("%.2f", d);
 990     AppendText(str);
 991     return *this;
 992 }
 993
 994 wxTextCtrl& wxTextCtrl::operator<<(int i)
 995 {
 996     wxString str;
 997     str.Printf("%d", i);
 998     AppendText(str);
 999     return *this;
1000 }
1001
1002 wxTextCtrl& wxTextCtrl::operator<<(long i)
1003 {
1004     wxString str;
1005     str.Printf("%ld", i);
1006     AppendText(str);
1007     return *this;
1008 }
1009
1010 wxTextCtrl& wxTextCtrl::operator<<(const char c)
1011 {
1012     char buf[2];
1013
1014     buf[0] = c;
1015     buf[1] = 0;
1016     AppendText(buf);
1017     return *this;
1018 }
1019
1020 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1021       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1022 {
1023 #if wxUSE_CTL3D
1024   if ( m_useCtl3D )
1025   {
1026     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1027     return (WXHBRUSH) hbrush;
1028   }
1029 #endif
1030
1031   if (GetParent()->GetTransparentBackground())
1032     SetBkMode((HDC) pDC, TRANSPARENT);
1033   else
1034     SetBkMode((HDC) pDC, OPAQUE);
1035
1036   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1037   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1038
1039   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1040
1041   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1042   // has a zero usage count.
1043   // NOT NOW - will be cleaned up at end of app.
1044 //  backgroundBrush->RealizeResource();
1045   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1046 }
1047
1048 void wxTextCtrl::OnChar(wxKeyEvent& event)
1049 {
1050     switch( event.KeyCode() )
1051     {
1052         case WXK_RETURN:
1053             if ( !(m_windowStyle & wxTE_MULTILINE) )
1054             {
1055                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1056                 event.SetEventObject( this );
1057                 if ( GetEventHandler()->ProcessEvent(event) )
1058                     return;
1059             }
1060             //else: multiline controls need Enter for themselves
1061
1062             break;
1063
1064         case WXK_TAB:
1065             // only produce navigation event if we don't process TAB ourself or
1066             // if it's a Shift-Tab keypress (we assume nobody will ever need
1067             // this key combo for himself)
1068             //
1069             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1070             //     handled by Windows
1071             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
1072             {
1073                 wxNavigationKeyEvent eventNav;
1074                 eventNav.SetDirection(!event.ShiftDown());
1075                 eventNav.SetWindowChange(FALSE);
1076                 eventNav.SetEventObject(this);
1077
1078                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1079                     return;
1080             }
1081             break;
1082
1083         default:
1084             event.Skip();
1085             return;
1086     }
1087
1088     // don't just call event.Skip() because this will cause TABs and ENTERs
1089     // be passed upwards and we don't always want this - instead process it
1090     // right here
1091     Default();
1092 //    event.Skip();
1093 }
1094
1095 long wxTextCtrl::MSWGetDlgCode()
1096 {
1097     // we always want the characters and the arrows
1098     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1099
1100     // we may have several different cases:
1101     // 1. normal case: both TAB and ENTER are used for dialog navigation
1102     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1103     //    control in the dialog
1104     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1105     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1106     //    the next control
1107     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1108         lRc |= DLGC_WANTMESSAGE;
1109     if ( m_windowStyle & wxTE_PROCESS_TAB )
1110         lRc |= DLGC_WANTTAB;
1111
1112     return lRc;
1113 }
1114
1115 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1116 {
1117     if ( m_windowStyle & wxTE_MULTILINE )
1118     {
1119         // No flicker - only problem is we probably can't change the background
1120         Default();
1121 /*
1122         RECT rect;
1123         ::GetClientRect((HWND) GetHWND(), &rect);
1124
1125         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1126         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1127
1128         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1129         ::DeleteObject(hBrush);
1130         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1131 */
1132     }
1133 //        wxWindow::OnEraseBackground(event);
1134 }
1135
1136 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1137 {
1138 /*
1139   // Debugging
1140   wxDebugMsg("Edit control %d: ", (int)id);
1141   switch (param)
1142   {
1143     case EN_SETFOCUS:
1144       wxDebugMsg("EN_SETFOCUS\n");
1145       break;
1146     case EN_KILLFOCUS:
1147       wxDebugMsg("EN_KILLFOCUS\n");
1148       break;
1149     case EN_CHANGE:
1150       wxDebugMsg("EN_CHANGE\n");
1151       break;
1152     case EN_UPDATE:
1153       wxDebugMsg("EN_UPDATE\n");
1154       break;
1155     case EN_ERRSPACE:
1156       wxDebugMsg("EN_ERRSPACE\n");
1157       break;
1158     case EN_MAXTEXT:
1159       wxDebugMsg("EN_MAXTEXT\n");
1160       break;
1161     case EN_HSCROLL:
1162       wxDebugMsg("EN_HSCROLL\n");
1163       break;
1164     case EN_VSCROLL:
1165       wxDebugMsg("EN_VSCROLL\n");
1166       break;
1167     default:
1168       wxDebugMsg("Unknown EDIT notification\n");
1169       break;
1170   }
1171 */
1172   switch (param)
1173   {
1174     case EN_SETFOCUS:
1175     case EN_KILLFOCUS:
1176       {
1177         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1178                                                  : wxEVT_SET_FOCUS,
1179                            m_windowId);
1180         event.SetEventObject( this );
1181         GetEventHandler()->ProcessEvent(event);
1182       }
1183       break;
1184
1185     case EN_CHANGE:
1186       {
1187         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1188         wxString val(GetValue());
1189         if ( !val.IsNull() )
1190           event.m_commandString = WXSTRINGCAST val;
1191         event.SetEventObject( this );
1192         ProcessCommand(event);
1193       }
1194       break;
1195
1196     // the other notification messages are not processed
1197     case EN_UPDATE:
1198     case EN_ERRSPACE:
1199     case EN_MAXTEXT:
1200     case EN_HSCROLL:
1201     case EN_VSCROLL:
1202     default:
1203       return FALSE;
1204   }
1205
1206   // processed
1207   return TRUE;
1208 }
1209
1210
1211 // For Rich Edit controls. Do we need it?
1212 #if 0
1213 #if wxUSE_RICHEDIT
1214 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1215 {
1216   wxCommandEvent event(0, m_windowId);
1217   int eventType = 0;
1218   NMHDR *hdr1 = (NMHDR *) lParam;
1219   switch ( hdr1->code )
1220   {
1221     // Insert case code here
1222     default :
1223       return wxControl::MSWNotify(wParam, lParam);
1224       break;
1225   }
1226
1227   event.SetEventObject( this );
1228   event.SetEventType(eventType);
1229
1230   if ( !GetEventHandler()->ProcessEvent(event) )
1231     return FALSE;
1232
1233     return TRUE;
1234 }
1235 #endif
1236 #endif
1237