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 #endif
  27
  28 #if wxUSE_CLIPBOARD
  29 #include "wx/app.h"
  30 #include "wx/clipbrd.h"
  31 #endif
  32
  33 #include "wx/msw/private.h"
  34
  35 #include <windows.h>
  36 #include <stdlib.h>
  37 #include "fstream.h"
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #if defined(__BORLANDC__) && !defined(__WIN32__)
  42 #include <alloc.h>
  43 #else
  44 #ifndef __GNUWIN32__
  45 #include <malloc.h>
  46 #endif
  47 #define farmalloc malloc
  48 #define farfree free
  49 #endif
  50 #include <windowsx.h>
  51
  52 #include <string.h>
  53
  54 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  55 #include <richedit.h>
  56 #endif
  57
  58 #if !USE_SHARED_LIBRARY
  59 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  60
  61 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  62         EVT_CHAR(wxTextCtrl::OnChar)
  63         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  64         EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  65 END_EVENT_TABLE()
  66
  67 #endif
  68
  69 // Text item
  70 wxTextCtrl::wxTextCtrl(void)
  71 #ifndef NO_TEXT_WINDOW_STREAM
  72  :streambuf()
  73 #endif
  74 {
  75   m_fileName = "";
  76   m_isRich = FALSE;
  77 }
  78
  79 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  80                    const wxString& value,
  81            const wxPoint& pos,
  82            const wxSize& size, long style,
  83            const wxValidator& validator,
  84            const wxString& name)
  85 {
  86   m_fileName = "";
  87   SetName(name);
  88   SetValidator(validator);
  89   if (parent) parent->AddChild(this);
  90
  91   m_windowStyle = style;
  92
  93   // Should this be taken from the system colours?
  94 //  SetBackgroundColour(wxColour(255, 255, 255));
  95
  96   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
  97
  98   SetForegroundColour(parent->GetDefaultForegroundColour()) ;
  99
 100   if ( id == -1 )
 101         m_windowId = (int)NewControlId();
 102   else
 103         m_windowId = id;
 104
 105   int x = pos.x;
 106   int y = pos.y;
 107   int width = size.x;
 108   int height = size.y;
 109
 110 #ifdef __WIN32__
 111   WXHGLOBAL m_globalHandle = 0;
 112 #else
 113   // Obscure method from the MS Developer's Network Disk for
 114   // using global memory instead of the local heap, which
 115   // runs out far too soon. Solves the problem with
 116   // failing to appear.
 117
 118   // Doesn't seem to work for Win95, so removing.
 119   m_globalHandle=0;
 120 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 121 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 122 //                         256L);
 123 #endif
 124   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 125   if (m_windowStyle & wxTE_MULTILINE)
 126         msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 127   else
 128     msStyle |= ES_AUTOHSCROLL ;
 129
 130   if (m_windowStyle & wxTE_READONLY)
 131     msStyle |= ES_READONLY;
 132
 133   if (m_windowStyle & wxHSCROLL)
 134     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 135   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 136     msStyle |= ES_PASSWORD;
 137
 138   char *windowClass = "EDIT";
 139 #if defined(__WIN95__)
 140   if ( m_windowStyle & wxTE_MULTILINE )
 141 #else
 142   if ( FALSE )
 143 #endif
 144   {
 145       msStyle |= ES_AUTOVSCROLL;
 146           m_isRich = TRUE;
 147           windowClass = "RichEdit" ;
 148   }
 149   else
 150           m_isRich = FALSE;
 151
 152   bool want3D;
 153   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 154
 155   // If we're in Win95, and we want a simple 2D border,
 156   // then make it an EDIT control instead.
 157 #if defined(__WIN95__)
 158   if (m_windowStyle & wxSIMPLE_BORDER)
 159   {
 160     windowClass = "EDIT";
 161         m_isRich = FALSE;
 162   }
 163 #endif
 164
 165   // Even with extended styles, need to combine with WS_BORDER
 166   // for them to look right.
 167   if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
 168        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 169     msStyle |= WS_BORDER;
 170
 171   HWND edit = CreateWindowEx(exStyle, windowClass, NULL,
 172                         msStyle,
 173                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 174                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 175
 176 #if CTL3D
 177   if ( want3D )
 178   {
 179     Ctl3dSubclassCtl(edit);
 180         m_useCtl3D = TRUE;
 181   }
 182 #endif
 183
 184   m_hWnd = (WXHWND)edit;
 185
 186 #if defined(__WIN95__)
 187   if (m_isRich)
 188   {
 189         // Have to enable events
 190         ::SendMessage(edit, EM_SETEVENTMASK, 0, ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 191   }
 192 #endif
 193
 194   SubclassWin(GetHWND());
 195
 196   if ( parent->GetFont() && parent->GetFont()->Ok() )
 197   {
 198         SetFont(* parent->GetFont());
 199   }
 200   else
 201   {
 202         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 203   }
 204
 205   SetSize(x, y, width, height);
 206
 207   // Causes a crash for Symantec C++ and WIN32 for some reason
 208 #if !(defined(__SC__) && defined(__WIN32__))
 209   if (value != "")
 210     SetWindowText(edit, (const char *)value);
 211 #endif
 212
 213   return TRUE;
 214 }
 215
 216 // Make sure the window style (etc.) reflects the HWND style (roughly)
 217 void wxTextCtrl::AdoptAttributesFromHWND(void)
 218 {
 219         wxWindow::AdoptAttributesFromHWND();
 220
 221         HWND hWnd = (HWND) GetHWND();
 222         long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 223
 224     char buf[256];
 225
 226 #ifndef __WIN32__
 227         GetClassName((HWND) hWnd, buf, 256);
 228 #else
 229 #ifdef UNICODE
 230         GetClassNameW((HWND) hWnd, buf, 256);
 231 #else
 232         GetClassNameA((HWND) hWnd, buf, 256);
 233 #endif
 234 #endif
 235
 236         wxString str(buf);
 237         str.UpperCase();
 238
 239         if (str == "EDIT")
 240                 m_isRich = FALSE;
 241         else
 242                 m_isRich = TRUE;
 243
 244         if (style & ES_MULTILINE)
 245                 m_windowStyle |= wxTE_MULTILINE;
 246         if (style & ES_PASSWORD)
 247                 m_windowStyle |= wxTE_PASSWORD;
 248         if (style & ES_READONLY)
 249                 m_windowStyle |= wxTE_READONLY;
 250         if (style & ES_WANTRETURN)
 251                 m_windowStyle |= wxTE_PROCESS_ENTER;
 252 }
 253
 254 void wxTextCtrl::SetupColours(void)
 255 {
 256   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 257   SetForegroundColour(GetParent()->GetDefaultForegroundColour());
 258 }
 259
 260 wxString wxTextCtrl::GetValue(void) const
 261 {
 262     int length = GetWindowTextLength((HWND) GetHWND());
 263     char *s = new char[length+1];
 264     GetWindowText((HWND) GetHWND(), s, length+1);
 265     wxString str(s);
 266     delete[] s;
 267         return str;
 268 }
 269
 270 void wxTextCtrl::SetValue(const wxString& value)
 271 {
 272   // If newlines are denoted by just 10, must stick 13 in front.
 273   int singletons = 0;
 274   int len = value.Length();
 275   int i;
 276   for (i = 0; i < len; i ++)
 277   {
 278     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 279       singletons ++;
 280   }
 281   if (singletons > 0)
 282   {
 283     char *tmp = new char[len + singletons + 1];
 284     int j = 0;
 285     for (i = 0; i < len; i ++)
 286     {
 287       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 288       {
 289         tmp[j] = 13;
 290         j ++;
 291       }
 292       tmp[j] = value[i];
 293       j ++;
 294     }
 295     tmp[j] = 0;
 296     SetWindowText((HWND) GetHWND(), tmp);
 297     delete[] tmp;
 298   }
 299   else
 300     SetWindowText((HWND) GetHWND(), (const char *)value);
 301 }
 302
 303 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 304 {
 305   int currentX, currentY;
 306   GetPosition(&currentX, &currentY);
 307   int x1 = x;
 308   int y1 = y;
 309   int w1 = width;
 310   int h1 = height;
 311
 312   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 313     x1 = currentX;
 314   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 315     y1 = currentY;
 316
 317   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 318
 319   int cx; // button font dimensions
 320   int cy;
 321
 322   wxGetCharSize(GetHWND(), &cx, &cy,GetFont());
 323
 324   int control_width, control_height, control_x, control_y;
 325
 326   // If we're prepared to use the existing size, then...
 327   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 328   {
 329     GetSize(&w1, &h1);
 330   }
 331
 332   // Deal with default size (using -1 values)
 333   if (w1<=0)
 334     w1 = DEFAULT_ITEM_WIDTH;
 335
 336   control_x = x1;
 337   control_y = y1;
 338   control_width = w1;
 339   control_height = h1;
 340
 341   // Calculations may have made text size too small
 342   if (control_height <= 0)
 343     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 344
 345   if (control_width <= 0)
 346     control_width = DEFAULT_ITEM_WIDTH;
 347
 348   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 349                               (int)control_width, (int)control_height, TRUE);
 350 }
 351
 352 // Clipboard operations
 353 void wxTextCtrl::Copy(void)
 354 {
 355   HWND hWnd = (HWND) GetHWND();
 356   SendMessage(hWnd, WM_COPY, 0, 0L);
 357 }
 358
 359 void wxTextCtrl::Cut(void)
 360 {
 361   HWND hWnd = (HWND) GetHWND();
 362   SendMessage(hWnd, WM_CUT, 0, 0L);
 363 }
 364
 365 void wxTextCtrl::Paste(void)
 366 {
 367   HWND hWnd = (HWND) GetHWND();
 368   SendMessage(hWnd, WM_PASTE, 0, 0L);
 369 }
 370
 371 void wxTextCtrl::SetEditable(bool editable)
 372 {
 373   HWND hWnd = (HWND) GetHWND();
 374   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 375 }
 376
 377 void wxTextCtrl::SetInsertionPoint(long pos)
 378 {
 379   HWND hWnd = (HWND) GetHWND();
 380 #ifdef __WIN32__
 381 #if defined(__WIN95__)
 382   if ( m_isRich)
 383   {
 384     CHARRANGE range;
 385     range.cpMin = pos;
 386     range.cpMax = pos;
 387     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 388     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 389   }
 390   else
 391 #endif
 392   {
 393     SendMessage(hWnd, EM_SETSEL, pos, pos);
 394     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 395   }
 396 #else
 397   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 398 #endif
 399   char *nothing = "";
 400   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 401 }
 402
 403 void wxTextCtrl::SetInsertionPointEnd(void)
 404 {
 405   long pos = GetLastPosition();
 406   SetInsertionPoint(pos);
 407 }
 408
 409 long wxTextCtrl::GetInsertionPoint(void) const
 410 {
 411 #if defined(__WIN95__)
 412   if (m_isRich)
 413   {
 414     CHARRANGE range;
 415     range.cpMin = 0;
 416     range.cpMax = 0;
 417     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 418     return range.cpMin;
 419   }
 420 #endif
 421
 422   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 423   return Pos&0xFFFF;
 424 }
 425
 426 long wxTextCtrl::GetLastPosition(void) const
 427 {
 428     HWND hWnd = (HWND) GetHWND();
 429
 430     // Will always return a number > 0 (according to docs)
 431     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 432
 433     // This gets the char index for the _beginning_ of the last line
 434     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 435
 436     // Get number of characters in the last line. We'll add this to the character
 437     // index for the last line, 1st position.
 438     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 439
 440     return (long)(charIndex + lineLength);
 441 }
 442
 443 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 444 {
 445     HWND hWnd = (HWND) GetHWND();
 446     long fromChar = from;
 447     long toChar = to;
 448
 449     // Set selection and remove it
 450 #ifdef __WIN32__
 451     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 452 #else
 453     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 454 #endif
 455     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 456
 457     // Now replace with 'value', by pasting.
 458     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 459
 460     // Paste into edit control
 461     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 462 }
 463
 464 void wxTextCtrl::Remove(long from, long to)
 465 {
 466     HWND hWnd = (HWND) GetHWND();
 467     long fromChar = from;
 468     long toChar = to;
 469
 470     // Cut all selected text
 471 #ifdef __WIN32__
 472     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 473 #else
 474     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 475 #endif
 476     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 477 }
 478
 479 void wxTextCtrl::SetSelection(long from, long to)
 480 {
 481     HWND hWnd = (HWND) GetHWND();
 482     long fromChar = from;
 483     long toChar = to;
 484     // if from and to are both -1, it means
 485     // (in wxWindows) that all text should be selected.
 486     // This translates into Windows convention
 487     if ((from == -1) && (to == -1))
 488     {
 489       fromChar = 0;
 490       toChar = -1;
 491     }
 492
 493 #ifdef __WIN32__
 494     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 495     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 496 #else
 497     // WPARAM is 0: selection is scrolled into view
 498     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 499 #endif
 500 }
 501
 502 bool wxTextCtrl::LoadFile(const wxString& file)
 503 {
 504   if (!FileExists(WXSTRINGCAST file))
 505     return FALSE;
 506
 507   m_fileName = file;
 508
 509   Clear();
 510
 511   ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 512
 513   if (!input.bad())
 514   {
 515       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 516       // line by line into the control. Apart from being very slow this
 517       // was limited to 32K of text by the external interface presenting
 518       // positions as signed shorts. Now load in one chunk...
 519       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 520
 521       struct stat stat_buf;
 522       if (stat(file, &stat_buf) < 0)
 523         return FALSE;
 524 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 525       // This may need to be a bigger buffer than the file size suggests,
 526       // if it's a UNIX file. Give it an extra 1000 just in case.
 527       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 528       long no_lines = 0;
 529       long pos = 0;
 530       while (!input.eof() && input.peek() != EOF)
 531       {
 532         input.getline(wxBuffer, 500);
 533         int len = strlen(wxBuffer);
 534         wxBuffer[len] = 13;
 535         wxBuffer[len+1] = 10;
 536         wxBuffer[len+2] = 0;
 537         strcpy(tmp_buffer+pos, wxBuffer);
 538         pos += strlen(wxBuffer);
 539         no_lines++;
 540       }
 541
 542 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 543       SetWindowText((HWND) GetHWND(), tmp_buffer);
 544       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 545       farfree(tmp_buffer);
 546
 547       return TRUE;
 548   }
 549   return FALSE;
 550 }
 551
 552 // If file is null, try saved file name first
 553 // Returns TRUE if succeeds.
 554 bool wxTextCtrl::SaveFile(const wxString& file)
 555 {
 556   wxString theFile(file);
 557   if (theFile == "")
 558     theFile = m_fileName;
 559   if (theFile == "")
 560     return FALSE;
 561   m_fileName = theFile;
 562
 563   ofstream output((char*) (const char*) theFile);
 564   if (output.bad())
 565         return FALSE;
 566
 567     // This will only save 64K max
 568     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 569     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 570     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 571     char *pstr = tmp_buffer;
 572
 573         // Convert \r\n to just \n
 574         while (*pstr)
 575         {
 576                 if (*pstr != '\r')
 577                         output << *pstr;
 578                 pstr++;
 579         }
 580
 581     farfree(tmp_buffer);
 582     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 583
 584     return TRUE;
 585 }
 586
 587 void wxTextCtrl::WriteText(const wxString& text)
 588 {
 589     // Covert \n to \r\n
 590     int len = text.Length();
 591     char *newtext = new char[(len*2)+1];
 592     int i = 0;
 593     int j = 0;
 594     while (i < len)
 595     {
 596       if (text[i] == '\n')
 597       {
 598         newtext[j] = '\r';
 599         j ++;
 600       }
 601       newtext[j] = text[i];
 602       i ++;
 603       j ++;
 604     }
 605     newtext[j] = 0;
 606     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 607     delete[] newtext;
 608 }
 609
 610 void wxTextCtrl::Clear(void)
 611 {
 612 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 613     SetWindowText((HWND) GetHWND(), "");
 614 }
 615
 616 bool wxTextCtrl::IsModified(void) const
 617 {
 618     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 619 }
 620
 621 // Makes 'unmodified'
 622 void wxTextCtrl::DiscardEdits(void)
 623 {
 624   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 625 }
 626
 627 /*
 628  * Some of the following functions are yet to be implemented
 629  *
 630  */
 631
 632 int wxTextCtrl::GetNumberOfLines(void) const
 633 {
 634     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 635 }
 636
 637 long wxTextCtrl::XYToPosition(long x, long y) const
 638 {
 639     HWND hWnd = (HWND) GetHWND();
 640
 641     // This gets the char index for the _beginning_ of this line
 642     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 643     return (long)(x + charIndex);
 644 }
 645
 646 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 647 {
 648     HWND hWnd = (HWND) GetHWND();
 649
 650     // This gets the line number containing the character
 651     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 652     // This gets the char index for the _beginning_ of this line
 653     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 654     // The X position must therefore be the different between pos and charIndex
 655     *x = (long)(pos - charIndex);
 656     *y = (long)lineNo;
 657 }
 658
 659 void wxTextCtrl::ShowPosition(long pos)
 660 {
 661     HWND hWnd = (HWND) GetHWND();
 662
 663     // To scroll to a position, we pass the number of lines and characters
 664     // to scroll *by*. This means that we need to:
 665     // (1) Find the line position of the current line.
 666     // (2) Find the line position of pos.
 667     // (3) Scroll by (pos - current).
 668     // For now, ignore the horizontal scrolling.
 669
 670     // Is this where scrolling is relative to - the line containing the caret?
 671     // Or is the first visible line??? Try first visible line.
 672 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 673
 674     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 675
 676     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 677
 678     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 679
 680 /*
 681     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 682       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 683 */
 684
 685     if (linesToScroll != 0)
 686       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 687 }
 688
 689 int wxTextCtrl::GetLineLength(long lineNo) const
 690 {
 691     long charIndex = XYToPosition(0, lineNo);
 692     HWND hWnd = (HWND) GetHWND();
 693     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 694     return len;
 695 }
 696
 697 wxString wxTextCtrl::GetLineText(long lineNo) const
 698 {
 699     HWND hWnd = (HWND) GetHWND();
 700     *(WORD *)wxBuffer = 512;
 701     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 702     wxBuffer[noChars] = 0;
 703         return wxString(wxBuffer);
 704 }
 705
 706 /*
 707  * Text item
 708  */
 709
 710 void wxTextCtrl::Command(wxCommandEvent & event)
 711 {
 712   SetValue (event.GetString());
 713   ProcessCommand (event);
 714 }
 715
 716 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 717 {
 718   // By default, load the first file into the text window.
 719   if (event.GetNumberOfFiles() > 0)
 720   {
 721     LoadFile(event.GetFiles()[0]);
 722   }
 723 }
 724
 725 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 726 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 727
 728 //=========================================================================
 729 // Called then the buffer is full (gcc 2.6.3)
 730 // or when "endl" is output (Borland 4.5)
 731 //=========================================================================
 732 // Class declaration using multiple inheritance doesn't work properly for
 733 // Borland. See note in wb_text.h.
 734 #ifndef NO_TEXT_WINDOW_STREAM
 735 int wxTextCtrl::overflow(int c)
 736 {
 737   // Make sure there is a holding area
 738   if ( allocate()==EOF )
 739   {
 740     wxError("Streambuf allocation failed","Internal error");
 741     return EOF;
 742   }
 743
 744   // Verify that there are no characters in get area
 745   if ( gptr() && gptr() < egptr() )
 746   {
 747      wxError("Who's trespassing my get area?","Internal error");
 748      return EOF;
 749   }
 750
 751   // Reset get area
 752   setg(0,0,0);
 753
 754   // Make sure there is a put area
 755   if ( ! pptr() )
 756   {
 757 /* This doesn't seem to be fatal so comment out error message */
 758 //    wxError("Put area not opened","Internal error");
 759     setp( base(), base() );
 760   }
 761
 762   // Determine how many characters have been inserted but no consumed
 763   int plen = pptr() - pbase();
 764
 765   // Now Jerry relies on the fact that the buffer is at least 2 chars
 766   // long, but the holding area "may be as small as 1" ???
 767   // And we need an additional \0, so let's keep this inefficient but
 768   // safe copy.
 769
 770   // If c!=EOF, it is a character that must also be comsumed
 771   int xtra = c==EOF? 0 : 1;
 772
 773   // Write temporary C-string to wxTextWindow
 774   {
 775   char *txt = new char[plen+xtra+1];
 776   memcpy(txt, pbase(), plen);
 777   txt[plen] = (char)c;     // append c
 778   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 779     // If the put area already contained \0, output will be truncated there
 780   WriteText(txt);
 781     delete[] txt;
 782   }
 783
 784   // Reset put area
 785   setp(pbase(), epptr());
 786
 787 #if defined(__WATCOMC__)
 788   return __NOT_EOF;
 789 #elif defined(zapeof)     // HP-UX (all cfront based?)
 790   return zapeof(c);
 791 #else
 792   return c!=EOF ? c : 0;  // this should make everybody happy
 793 #endif
 794
 795 /* OLD CODE
 796   int len = pptr() - pbase();
 797   char *txt = new char[len+1];
 798   strncpy(txt, pbase(), len);
 799   txt[len] = '\0';
 800   (*this) << txt;
 801   setp(pbase(), epptr());
 802   delete[] txt;
 803   return EOF;
 804 */
 805 }
 806
 807 //=========================================================================
 808 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 809 //=========================================================================
 810 int wxTextCtrl::sync(void)
 811 {
 812   // Verify that there are no characters in get area
 813   if ( gptr() && gptr() < egptr() )
 814   {
 815      wxError("Who's trespassing my get area?","Internal error");
 816      return EOF;
 817   }
 818
 819   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 820
 821   return 0;
 822 /* OLD CODE
 823   int len = pptr() - pbase();
 824   char *txt = new char[len+1];
 825   strncpy(txt, pbase(), len);
 826   txt[len] = '\0';
 827   (*this) << txt;
 828   setp(pbase(), epptr());
 829   delete[] txt;
 830   return 0;
 831 */
 832 }
 833
 834 //=========================================================================
 835 // Should not be called by a "ostream". Used by a "istream"
 836 //=========================================================================
 837 int wxTextCtrl::underflow(void)
 838 {
 839   return EOF;
 840 }
 841 #endif
 842
 843 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 844 {
 845   WriteText(s);
 846   return *this;
 847 }
 848
 849 wxTextCtrl& wxTextCtrl::operator<<(float f)
 850 {
 851     wxString str;
 852     str.Printf("%.2f", f);
 853     WriteText(str);
 854     return *this;
 855 }
 856
 857 wxTextCtrl& wxTextCtrl::operator<<(double d)
 858 {
 859     wxString str;
 860     str.Printf("%.2f", d);
 861     WriteText(str);
 862     return *this;
 863 }
 864
 865 wxTextCtrl& wxTextCtrl::operator<<(int i)
 866 {
 867     wxString str;
 868     str.Printf("%d", i);
 869     WriteText(str);
 870     return *this;
 871 }
 872
 873 wxTextCtrl& wxTextCtrl::operator<<(long i)
 874 {
 875     wxString str;
 876     str.Printf("%ld", i);
 877     WriteText(str);
 878     return *this;
 879 }
 880
 881 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 882 {
 883     char buf[2];
 884
 885     buf[0] = c;
 886     buf[1] = 0;
 887     WriteText(buf);
 888     return *this;
 889 }
 890
 891 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 892                         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 893 {
 894 #if CTL3D
 895   if ( m_useCtl3D )
 896   {
 897     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 898     return (WXHBRUSH) hbrush;
 899   }
 900 #endif
 901
 902   if (GetParent()->GetTransparentBackground())
 903     SetBkMode((HDC) pDC, TRANSPARENT);
 904   else
 905     SetBkMode((HDC) pDC, OPAQUE);
 906
 907   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 908   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 909
 910   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 911
 912   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 913   // has a zero usage count.
 914   // NOT NOW - will be cleaned up at end of app.
 915 //  backgroundBrush->RealizeResource();
 916   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 917 }
 918
 919 void wxTextCtrl::OnChar(wxKeyEvent& event)
 920 {
 921         if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 922         {
 923                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 924                 event.SetEventObject( this );
 925                 if ( GetEventHandler()->ProcessEvent(event) )
 926       return;
 927         }
 928   else if ( event.KeyCode() == WXK_TAB ) {
 929     wxNavigationKeyEvent event;
 930     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 931     event.SetWindowChange(FALSE);
 932     event.SetEventObject(this);
 933
 934     if ( GetEventHandler()->ProcessEvent(event) )
 935       return;
 936   }
 937
 938   event.Skip();
 939 }
 940
 941 long wxTextCtrl::MSWGetDlgCode()
 942 {
 943   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 944   if ( m_windowStyle & wxPROCESS_ENTER )
 945     lRc |= DLGC_WANTMESSAGE;
 946   else if ( m_windowStyle & wxTE_MULTILINE )
 947     lRc |= DLGC_WANTMESSAGE;
 948
 949   return lRc;
 950 }
 951
 952 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 953 {
 954     if ( m_windowStyle & wxTE_MULTILINE )
 955     {
 956         // No flicker - only problem is we probably can't change the background
 957         Default();
 958 /*
 959         RECT rect;
 960         ::GetClientRect((HWND) GetHWND(), &rect);
 961
 962         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 963         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 964
 965         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 966         ::DeleteObject(hBrush);
 967         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 968 */
 969     }
 970 //        wxWindow::OnEraseBackground(event);
 971 }
 972
 973 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 974 {
 975 /*
 976   // Debugging
 977   wxDebugMsg("Edit control %d: ", (int)id);
 978   switch (param)
 979   {
 980     case EN_SETFOCUS:
 981       wxDebugMsg("EN_SETFOCUS\n");
 982       break;
 983     case EN_KILLFOCUS:
 984       wxDebugMsg("EN_KILLFOCUS\n");
 985       break;
 986     case EN_CHANGE:
 987       wxDebugMsg("EN_CHANGE\n");
 988       break;
 989     case EN_UPDATE:
 990       wxDebugMsg("EN_UPDATE\n");
 991       break;
 992     case EN_ERRSPACE:
 993       wxDebugMsg("EN_ERRSPACE\n");
 994       break;
 995     case EN_MAXTEXT:
 996       wxDebugMsg("EN_MAXTEXT\n");
 997       break;
 998     case EN_HSCROLL:
 999       wxDebugMsg("EN_HSCROLL\n");
1000       break;
1001     case EN_VSCROLL:
1002       wxDebugMsg("EN_VSCROLL\n");
1003       break;
1004     default:
1005       wxDebugMsg("Unknown EDIT notification\n");
1006       break;
1007   }
1008 */
1009   switch (param)
1010   {
1011     case EN_SETFOCUS:
1012     case EN_KILLFOCUS:
1013       {
1014         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1015                                                  : wxEVT_SET_FOCUS,
1016                            m_windowId);
1017         event.SetEventObject( this );
1018         ProcessEvent(event);
1019       }
1020       break;
1021
1022     case EN_CHANGE:
1023       {
1024         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1025         wxString val(GetValue());
1026         if ( !val.IsNull() )
1027           event.m_commandString = WXSTRINGCAST val;
1028         event.SetEventObject( this );
1029         ProcessCommand(event);
1030       }
1031       break;
1032
1033     // the other notification messages are not processed
1034     case EN_UPDATE:
1035     case EN_ERRSPACE:
1036     case EN_MAXTEXT:
1037     case EN_HSCROLL:
1038     case EN_VSCROLL:
1039     default:
1040       return FALSE;
1041   }
1042
1043   // processed
1044   return TRUE;
1045 }
1046
1047
1048 // For Rich Edit controls. Do we need it?
1049 #if 0
1050 #if defined(__WIN95__)
1051 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1052 {
1053         wxCommandEvent event(0, m_windowId);
1054         int eventType = 0;
1055         NMHDR *hdr1 = (NMHDR *) lParam;
1056         switch ( hdr1->code )
1057         {
1058                 // Insert case code here
1059                 default :
1060                         return wxControl::MSWNotify(wParam, lParam);
1061                         break;
1062         }
1063
1064         event.SetEventObject( this );
1065         event.SetEventType(eventType);
1066
1067         if ( !ProcessEvent(event) )
1068                 return FALSE;
1069
1070         return TRUE;
1071 }
1072 #endif
1073 #endif
1074