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 #  ifdef _MSC_VER
  46       using namespace std;
  47 #  endif
  48 #endif
  49
  50 #include <sys/types.h>
  51 #ifndef __MWERKS__
  52 #include <sys/stat.h>
  53 #else
  54 #include <stat.h>
  55 #endif
  56 #if defined(__BORLANDC__) && !defined(__WIN32__)
  57 #include <alloc.h>
  58 #else
  59 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
  60 #include <malloc.h>
  61 #endif
  62 #define farmalloc malloc
  63 #define farfree free
  64 #endif
  65 #include <windowsx.h>
  66
  67 #include <string.h>
  68
  69 #if wxUSE_RICHEDIT && !defined(__GNUWIN32__)
  70     #include <richedit.h>
  71 #endif
  72
  73 #if !USE_SHARED_LIBRARY
  74 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  75
  76 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  77   EVT_CHAR(wxTextCtrl::OnChar)
  78   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  79   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  80 END_EVENT_TABLE()
  81 #endif // USE_SHARED_LIBRARY
  82
  83 // Text item
  84 wxTextCtrl::wxTextCtrl()
  85 #ifndef NO_TEXT_WINDOW_STREAM
  86           : streambuf()
  87 #endif
  88 {
  89 #if wxUSE_RICHEDIT
  90   m_isRich = FALSE;
  91 #endif
  92 }
  93
  94 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  95                         const wxString& value,
  96                         const wxPoint& pos,
  97                         const wxSize& size, long style,
  98                         const wxValidator& validator,
  99                         const wxString& name)
 100 {
 101   m_fileName = "";
 102   SetName(name);
 103   SetValidator(validator);
 104   if (parent) parent->AddChild(this);
 105
 106   m_windowStyle = style;
 107
 108   // Should this be taken from the system colours?
 109 //  SetBackgroundColour(wxColour(255, 255, 255));
 110
 111   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 112
 113   SetForegroundColour(parent->GetForegroundColour()) ;
 114
 115   if ( id == -1 )
 116     m_windowId = (int)NewControlId();
 117   else
 118   m_windowId = id;
 119
 120   int x = pos.x;
 121   int y = pos.y;
 122   int width = size.x;
 123   int height = size.y;
 124
 125   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 126   if (m_windowStyle & wxTE_MULTILINE)
 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     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 }
 475
 476 void wxTextCtrl::Remove(long from, long to)
 477 {
 478     HWND hWnd = (HWND) GetHWND();
 479     long fromChar = from;
 480     long toChar = to;
 481
 482     // Cut all selected text
 483 #ifdef __WIN32__
 484     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 485 #else
 486     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 487 #endif
 488     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 489 }
 490
 491 void wxTextCtrl::SetSelection(long from, long to)
 492 {
 493     HWND hWnd = (HWND) GetHWND();
 494     long fromChar = from;
 495     long toChar = to;
 496     // if from and to are both -1, it means
 497     // (in wxWindows) that all text should be selected.
 498     // This translates into Windows convention
 499     if ((from == -1) && (to == -1))
 500     {
 501       fromChar = 0;
 502       toChar = -1;
 503     }
 504
 505 #ifdef __WIN32__
 506     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 507     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 508 #else
 509     // WPARAM is 0: selection is scrolled into view
 510     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 511 #endif
 512 }
 513
 514 bool wxTextCtrl::LoadFile(const wxString& file)
 515 {
 516   if (!wxFileExists(WXSTRINGCAST file))
 517     return FALSE;
 518
 519   m_fileName = file;
 520
 521   Clear();
 522
 523 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 524   ifstream input(WXSTRINGCAST file, ios::in);
 525
 526   if (!input.bad())
 527   {
 528       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 529       // line by line into the control. Apart from being very slow this
 530       // was limited to 32K of text by the external interface presenting
 531       // positions as signed shorts. Now load in one chunk...
 532       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 533
 534 #ifdef __SALFORDC__
 535       struct _stat stat_buf;
 536       if (stat((char*) (const char*) file, &stat_buf) < 0)
 537         return FALSE;
 538 #else
 539       struct stat stat_buf;
 540       if (stat(file, &stat_buf) < 0)
 541         return FALSE;
 542 #endif
 543
 544 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 545       // This may need to be a bigger buffer than the file size suggests,
 546       // if it's a UNIX file. Give it an extra 1000 just in case.
 547       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 548       long no_lines = 0;
 549       long pos = 0;
 550       while (!input.eof() && input.peek() != EOF)
 551       {
 552         input.getline(wxBuffer, 500);
 553   int len = strlen(wxBuffer);
 554   wxBuffer[len] = 13;
 555   wxBuffer[len+1] = 10;
 556   wxBuffer[len+2] = 0;
 557   strcpy(tmp_buffer+pos, wxBuffer);
 558   pos += strlen(wxBuffer);
 559   no_lines++;
 560       }
 561
 562 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 563       SetWindowText((HWND) GetHWND(), tmp_buffer);
 564       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 565       farfree(tmp_buffer);
 566
 567       return TRUE;
 568   }
 569   return FALSE;
 570 }
 571
 572 // If file is null, try saved file name first
 573 // Returns TRUE if succeeds.
 574 bool wxTextCtrl::SaveFile(const wxString& file)
 575 {
 576     wxString theFile(file);
 577
 578     if (theFile == "")
 579         theFile = m_fileName;
 580
 581     if (theFile == "")
 582         return FALSE;
 583
 584     m_fileName = theFile;
 585
 586     ofstream output((char*) (const char*) theFile);
 587     if (output.bad())
 588         return FALSE;
 589
 590     // This will only save 64K max
 591     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 592     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 593     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 594     char *pstr = tmp_buffer;
 595
 596     // Convert \r\n to just \n
 597     while (*pstr)
 598     {
 599       if (*pstr != '\r')
 600         output << *pstr;
 601       pstr++;
 602     }
 603
 604     farfree(tmp_buffer);
 605     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 606
 607     return TRUE;
 608 }
 609
 610 void wxTextCtrl::WriteText(const wxString& text)
 611 {
 612     // Covert \n to \r\n
 613     int len = text.Length();
 614     char *newtext = new char[(len*2)+1];
 615     int i = 0;
 616     int j = 0;
 617     while (i < len)
 618     {
 619       if (text[i] == '\n')
 620       {
 621         newtext[j] = '\r';
 622         j ++;
 623       }
 624       newtext[j] = text[i];
 625       i ++;
 626       j ++;
 627     }
 628     newtext[j] = 0;
 629     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 630     delete[] newtext;
 631 }
 632
 633 void wxTextCtrl::Clear()
 634 {
 635 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 636     SetWindowText((HWND) GetHWND(), "");
 637 }
 638
 639 bool wxTextCtrl::IsModified() const
 640 {
 641     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 642 }
 643
 644 // Makes 'unmodified'
 645 void wxTextCtrl::DiscardEdits()
 646 {
 647   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 648 }
 649
 650 /*
 651  * Some of the following functions are yet to be implemented
 652  *
 653  */
 654
 655 int wxTextCtrl::GetNumberOfLines() const
 656 {
 657     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 658 }
 659
 660 long wxTextCtrl::XYToPosition(long x, long y) const
 661 {
 662     HWND hWnd = (HWND) GetHWND();
 663
 664     // This gets the char index for the _beginning_ of this line
 665     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 666     return (long)(x + charIndex);
 667 }
 668
 669 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 670 {
 671     HWND hWnd = (HWND) GetHWND();
 672
 673     // This gets the line number containing the character
 674     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 675     // This gets the char index for the _beginning_ of this line
 676     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 677     // The X position must therefore be the different between pos and charIndex
 678     *x = (long)(pos - charIndex);
 679     *y = (long)lineNo;
 680 }
 681
 682 void wxTextCtrl::ShowPosition(long pos)
 683 {
 684     HWND hWnd = (HWND) GetHWND();
 685
 686     // To scroll to a position, we pass the number of lines and characters
 687     // to scroll *by*. This means that we need to:
 688     // (1) Find the line position of the current line.
 689     // (2) Find the line position of pos.
 690     // (3) Scroll by (pos - current).
 691     // For now, ignore the horizontal scrolling.
 692
 693     // Is this where scrolling is relative to - the line containing the caret?
 694     // Or is the first visible line??? Try first visible line.
 695 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 696
 697     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 698
 699     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 700
 701     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 702
 703 /*
 704     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 705       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 706 */
 707
 708     if (linesToScroll != 0)
 709       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 710 }
 711
 712 int wxTextCtrl::GetLineLength(long lineNo) const
 713 {
 714     long charIndex = XYToPosition(0, lineNo);
 715     HWND hWnd = (HWND) GetHWND();
 716     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 717     return len;
 718 }
 719
 720 wxString wxTextCtrl::GetLineText(long lineNo) const
 721 {
 722     HWND hWnd = (HWND) GetHWND();
 723     *(WORD *)wxBuffer = 512;
 724     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 725     wxBuffer[noChars] = 0;
 726   return wxString(wxBuffer);
 727 }
 728
 729 /*
 730  * Text item
 731  */
 732
 733 void wxTextCtrl::Command(wxCommandEvent & event)
 734 {
 735   SetValue (event.GetString());
 736   ProcessCommand (event);
 737 }
 738
 739 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 740 {
 741   // By default, load the first file into the text window.
 742   if (event.GetNumberOfFiles() > 0)
 743   {
 744     LoadFile(event.GetFiles()[0]);
 745   }
 746 }
 747
 748 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 749 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 750
 751 //=========================================================================
 752 // Called then the buffer is full (gcc 2.6.3)
 753 // or when "endl" is output (Borland 4.5)
 754 //=========================================================================
 755 // Class declaration using multiple inheritance doesn't work properly for
 756 // Borland. See note in textctrl.h.
 757 #ifndef NO_TEXT_WINDOW_STREAM
 758 int wxTextCtrl::overflow(int c)
 759 {
 760   // Make sure there is a holding area
 761   // this is not needed in <iostream> usage as it automagically allocates
 762   // it, but does someone want to emulate it for safety's sake?
 763 #if wxUSE_IOSTREAMH
 764   if ( allocate()==EOF )
 765   {
 766     wxLogError("Streambuf allocation failed");
 767     return EOF;
 768   }
 769 #endif
 770
 771   // Verify that there are no characters in get area
 772   if ( gptr() && gptr() < egptr() )
 773   {
 774      wxError("Who's trespassing my get area?","Internal error");
 775      return EOF;
 776   }
 777
 778   // Reset get area
 779   setg(0,0,0);
 780
 781   // Make sure there is a put area
 782   if ( ! pptr() )
 783   {
 784 /* This doesn't seem to be fatal so comment out error message */
 785 //    wxError("Put area not opened","Internal error");
 786
 787 #if wxUSE_IOSTREAMH
 788           setp( base(), base() );
 789 #else
 790           setp( pbase(), pbase() );
 791 #endif
 792   }
 793
 794   // Determine how many characters have been inserted but no consumed
 795   int plen = pptr() - pbase();
 796
 797   // Now Jerry relies on the fact that the buffer is at least 2 chars
 798   // long, but the holding area "may be as small as 1" ???
 799   // And we need an additional \0, so let's keep this inefficient but
 800   // safe copy.
 801
 802   // If c!=EOF, it is a character that must also be comsumed
 803   int xtra = c==EOF? 0 : 1;
 804
 805   // Write temporary C-string to wxTextWindow
 806   {
 807   char *txt = new char[plen+xtra+1];
 808   memcpy(txt, pbase(), plen);
 809   txt[plen] = (char)c;     // append c
 810   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 811     // If the put area already contained \0, output will be truncated there
 812   WriteText(txt);
 813     delete[] txt;
 814   }
 815
 816   // Reset put area
 817   setp(pbase(), epptr());
 818
 819 #if defined(__WATCOMC__)
 820   return __NOT_EOF;
 821 #elif defined(zapeof)     // HP-UX (all cfront based?)
 822   return zapeof(c);
 823 #else
 824   return c!=EOF ? c : 0;  // this should make everybody happy
 825 #endif
 826
 827 /* OLD CODE
 828   int len = pptr() - pbase();
 829   char *txt = new char[len+1];
 830   strncpy(txt, pbase(), len);
 831   txt[len] = '\0';
 832   (*this) << txt;
 833   setp(pbase(), epptr());
 834   delete[] txt;
 835   return EOF;
 836 */
 837 }
 838
 839 //=========================================================================
 840 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 841 //=========================================================================
 842 int wxTextCtrl::sync()
 843 {
 844   // Verify that there are no characters in get area
 845   if ( gptr() && gptr() < egptr() )
 846   {
 847      wxError("Who's trespassing my get area?","Internal error");
 848      return EOF;
 849   }
 850
 851   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 852
 853   return 0;
 854 /* OLD CODE
 855   int len = pptr() - pbase();
 856   char *txt = new char[len+1];
 857   strncpy(txt, pbase(), len);
 858   txt[len] = '\0';
 859   (*this) << txt;
 860   setp(pbase(), epptr());
 861   delete[] txt;
 862   return 0;
 863 */
 864 }
 865
 866 //=========================================================================
 867 // Should not be called by a "ostream". Used by a "istream"
 868 //=========================================================================
 869 int wxTextCtrl::underflow()
 870 {
 871   return EOF;
 872 }
 873 #endif
 874
 875 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 876 {
 877   WriteText(s);
 878   return *this;
 879 }
 880
 881 wxTextCtrl& wxTextCtrl::operator<<(float f)
 882 {
 883     wxString str;
 884     str.Printf("%.2f", f);
 885     WriteText(str);
 886     return *this;
 887 }
 888
 889 wxTextCtrl& wxTextCtrl::operator<<(double d)
 890 {
 891     wxString str;
 892     str.Printf("%.2f", d);
 893     WriteText(str);
 894     return *this;
 895 }
 896
 897 wxTextCtrl& wxTextCtrl::operator<<(int i)
 898 {
 899     wxString str;
 900     str.Printf("%d", i);
 901     WriteText(str);
 902     return *this;
 903 }
 904
 905 wxTextCtrl& wxTextCtrl::operator<<(long i)
 906 {
 907     wxString str;
 908     str.Printf("%ld", i);
 909     WriteText(str);
 910     return *this;
 911 }
 912
 913 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 914 {
 915     char buf[2];
 916
 917     buf[0] = c;
 918     buf[1] = 0;
 919     WriteText(buf);
 920     return *this;
 921 }
 922
 923 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 924       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 925 {
 926 #if wxUSE_CTL3D
 927   if ( m_useCtl3D )
 928   {
 929     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 930     return (WXHBRUSH) hbrush;
 931   }
 932 #endif
 933
 934   if (GetParent()->GetTransparentBackground())
 935     SetBkMode((HDC) pDC, TRANSPARENT);
 936   else
 937     SetBkMode((HDC) pDC, OPAQUE);
 938
 939   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 940   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 941
 942   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 943
 944   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 945   // has a zero usage count.
 946   // NOT NOW - will be cleaned up at end of app.
 947 //  backgroundBrush->RealizeResource();
 948   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 949 }
 950
 951 void wxTextCtrl::OnChar(wxKeyEvent& event)
 952 {
 953     switch( event.KeyCode() )
 954     {
 955         // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 956         case '{':
 957         case '}':
 958         case '[':
 959         case ']':
 960         case '|':
 961         case '~':
 962         case '\\':
 963             {
 964                 char c = (char)event.KeyCode();
 965                 *this << c;
 966             }
 967             break;
 968
 969         case WXK_RETURN:
 970             wxASSERT_MSG( m_windowStyle & wxTE_PROCESS_ENTER,
 971                           "this text ctrl should never receive return" );
 972             {
 973                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 974                 event.SetEventObject( this );
 975                 if ( GetEventHandler()->ProcessEvent(event) )
 976                     return;
 977             }
 978
 979         case WXK_TAB:
 980             // only produce navigation event if we don't process TAB ourself
 981             if ( !(m_windowStyle & wxTE_PROCESS_TAB) )
 982             {
 983                 wxNavigationKeyEvent event;
 984                 event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 985                 event.SetWindowChange(FALSE);
 986                 event.SetEventObject(this);
 987
 988                 if ( GetEventHandler()->ProcessEvent(event) )
 989                     return;
 990             }
 991     }
 992
 993     // don't just call event.Skip() because this will cause TABs and ENTERs
 994     // be passed upwards and we don't always want this - instead process it
 995     // right here
 996     Default();
 997 }
 998
 999 long wxTextCtrl::MSWGetDlgCode()
1000 {
1001     // we always want the characters and the arrows
1002     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1003
1004     // we may have several different cases:
1005     // 1. normal case: both TAB and ENTER are used for dialog navigation
1006     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1007     //    control in the dialog
1008     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1009     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1010     //    the next control
1011     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1012         lRc |= DLGC_WANTMESSAGE;
1013     if ( m_windowStyle & wxTE_PROCESS_TAB )
1014         lRc |= DLGC_WANTTAB;
1015
1016     return lRc;
1017 }
1018
1019 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1020 {
1021     if ( m_windowStyle & wxTE_MULTILINE )
1022     {
1023         // No flicker - only problem is we probably can't change the background
1024         Default();
1025 /*
1026         RECT rect;
1027         ::GetClientRect((HWND) GetHWND(), &rect);
1028
1029         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1030         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1031
1032         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1033         ::DeleteObject(hBrush);
1034         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1035 */
1036     }
1037 //        wxWindow::OnEraseBackground(event);
1038 }
1039
1040 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1041 {
1042 /*
1043   // Debugging
1044   wxDebugMsg("Edit control %d: ", (int)id);
1045   switch (param)
1046   {
1047     case EN_SETFOCUS:
1048       wxDebugMsg("EN_SETFOCUS\n");
1049       break;
1050     case EN_KILLFOCUS:
1051       wxDebugMsg("EN_KILLFOCUS\n");
1052       break;
1053     case EN_CHANGE:
1054       wxDebugMsg("EN_CHANGE\n");
1055       break;
1056     case EN_UPDATE:
1057       wxDebugMsg("EN_UPDATE\n");
1058       break;
1059     case EN_ERRSPACE:
1060       wxDebugMsg("EN_ERRSPACE\n");
1061       break;
1062     case EN_MAXTEXT:
1063       wxDebugMsg("EN_MAXTEXT\n");
1064       break;
1065     case EN_HSCROLL:
1066       wxDebugMsg("EN_HSCROLL\n");
1067       break;
1068     case EN_VSCROLL:
1069       wxDebugMsg("EN_VSCROLL\n");
1070       break;
1071     default:
1072       wxDebugMsg("Unknown EDIT notification\n");
1073       break;
1074   }
1075 */
1076   switch (param)
1077   {
1078     case EN_SETFOCUS:
1079     case EN_KILLFOCUS:
1080       {
1081         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1082                                                  : wxEVT_SET_FOCUS,
1083                            m_windowId);
1084         event.SetEventObject( this );
1085         GetEventHandler()->ProcessEvent(event);
1086       }
1087       break;
1088
1089     case EN_CHANGE:
1090       {
1091         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1092         wxString val(GetValue());
1093         if ( !val.IsNull() )
1094           event.m_commandString = WXSTRINGCAST val;
1095         event.SetEventObject( this );
1096         ProcessCommand(event);
1097       }
1098       break;
1099
1100     // the other notification messages are not processed
1101     case EN_UPDATE:
1102     case EN_ERRSPACE:
1103     case EN_MAXTEXT:
1104     case EN_HSCROLL:
1105     case EN_VSCROLL:
1106     default:
1107       return FALSE;
1108   }
1109
1110   // processed
1111   return TRUE;
1112 }
1113
1114
1115 // For Rich Edit controls. Do we need it?
1116 #if 0
1117 #if wxUSE_RICHEDIT
1118 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1119 {
1120   wxCommandEvent event(0, m_windowId);
1121   int eventType = 0;
1122   NMHDR *hdr1 = (NMHDR *) lParam;
1123   switch ( hdr1->code )
1124   {
1125     // Insert case code here
1126     default :
1127       return wxControl::MSWNotify(wParam, lParam);
1128       break;
1129   }
1130
1131   event.SetEventObject( this );
1132   event.SetEventType(eventType);
1133
1134   if ( !GetEventHandler()->ProcessEvent(event) )
1135     return FALSE;
1136
1137     return TRUE;
1138 }
1139 #endif
1140 #endif
1141