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
  38 #if wxUSE_IOSTREAMH
  39 #include <fstream.h>
  40 #else
  41 #include <fstream>
  42 #  ifdef _MSC_VER
  43       using namespace std;
  44 #  endif
  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 #ifndef __GNUWIN32__
  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 defined(__WIN95__) && !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
  79 #endif
  80
  81 // Text item
  82 wxTextCtrl::wxTextCtrl(void)
  83 #ifndef NO_TEXT_WINDOW_STREAM
  84  :streambuf()
  85 #endif
  86 {
  87   m_fileName = "";
  88   m_isRich = FALSE;
  89 }
  90
  91 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  92                         const wxString& value,
  93                         const wxPoint& pos,
  94                         const wxSize& size, long style,
  95                         const wxValidator& validator,
  96                         const wxString& name)
  97 {
  98   m_fileName = "";
  99   SetName(name);
 100   SetValidator(validator);
 101   if (parent) parent->AddChild(this);
 102
 103   m_windowStyle = style;
 104
 105   // Should this be taken from the system colours?
 106 //  SetBackgroundColour(wxColour(255, 255, 255));
 107
 108   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 109
 110   SetForegroundColour(parent->GetForegroundColour()) ;
 111
 112   if ( id == -1 )
 113     m_windowId = (int)NewControlId();
 114   else
 115   m_windowId = id;
 116
 117   int x = pos.x;
 118   int y = pos.y;
 119   int width = size.x;
 120   int height = size.y;
 121
 122 #ifdef __WIN32__
 123   WXHGLOBAL m_globalHandle = 0;
 124 #else
 125   // Obscure method from the MS Developer's Network Disk for
 126   // using global memory instead of the local heap, which
 127   // runs out far too soon. Solves the problem with
 128   // failing to appear.
 129
 130   // Doesn't seem to work for Win95, so removing.
 131   m_globalHandle=0;
 132 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 133 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 134 //                         256L);
 135 #endif
 136
 137   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 138   if (m_windowStyle & wxTE_MULTILINE)
 139   msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 140   else
 141     msStyle |= ES_AUTOHSCROLL ;
 142
 143   if (m_windowStyle & wxTE_READONLY)
 144     msStyle |= ES_READONLY;
 145
 146   if (m_windowStyle & wxHSCROLL)
 147     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 148   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 149     msStyle |= ES_PASSWORD;
 150
 151   char *windowClass = "EDIT";
 152 #if defined(__WIN95__)
 153   if ( m_windowStyle & wxTE_MULTILINE )
 154   {
 155     msStyle |= ES_AUTOVSCROLL;
 156     m_isRich = TRUE;
 157     windowClass = "RichEdit" ;
 158   }
 159   else
 160 #endif
 161     m_isRich = FALSE;
 162
 163   bool want3D;
 164   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 165
 166   // If we're in Win95, and we want a simple 2D border,
 167   // then make it an EDIT control instead.
 168 #if defined(__WIN95__)
 169   if (m_windowStyle & wxSIMPLE_BORDER)
 170   {
 171     windowClass = "EDIT";
 172   m_isRich = FALSE;
 173   }
 174 #endif
 175
 176   // Even with extended styles, need to combine with WS_BORDER
 177   // for them to look right.
 178   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 179     msStyle |= WS_BORDER;
 180
 181   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 182                         msStyle,
 183                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 184                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 185
 186   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 187
 188 #if CTL3D
 189   if ( want3D )
 190   {
 191     Ctl3dSubclassCtl((HWND)m_hWnd);
 192     m_useCtl3D = TRUE;
 193   }
 194 #endif
 195
 196 #if defined(__WIN95__)
 197   if (m_isRich)
 198   {
 199     // Have to enable events
 200     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 201                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 202   }
 203 #endif
 204
 205   SubclassWin(GetHWND());
 206
 207   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 208   {
 209     SetFont(parent->GetFont());
 210   }
 211   else
 212   {
 213     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 214   }
 215
 216   SetSize(x, y, width, height);
 217
 218   // Causes a crash for Symantec C++ and WIN32 for some reason
 219 #if !(defined(__SC__) && defined(__WIN32__))
 220   if ( !value.IsEmpty() )
 221   {
 222     SetValue(value);
 223   }
 224 #endif
 225
 226   return TRUE;
 227 }
 228
 229 // Make sure the window style (etc.) reflects the HWND style (roughly)
 230 void wxTextCtrl::AdoptAttributesFromHWND(void)
 231 {
 232   wxWindow::AdoptAttributesFromHWND();
 233
 234   HWND hWnd = (HWND) GetHWND();
 235   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 236
 237     char buf[256];
 238
 239 #ifndef __WIN32__
 240   GetClassName((HWND) hWnd, buf, 256);
 241 #else
 242 #ifdef UNICODE
 243   GetClassNameW((HWND) hWnd, buf, 256);
 244 #else
 245   GetClassNameA((HWND) hWnd, buf, 256);
 246 #endif
 247 #endif
 248
 249   wxString str(buf);
 250   str.UpperCase();
 251
 252   if (str == "EDIT")
 253     m_isRich = FALSE;
 254   else
 255     m_isRich = TRUE;
 256
 257   if (style & ES_MULTILINE)
 258     m_windowStyle |= wxTE_MULTILINE;
 259   if (style & ES_PASSWORD)
 260     m_windowStyle |= wxTE_PASSWORD;
 261   if (style & ES_READONLY)
 262     m_windowStyle |= wxTE_READONLY;
 263   if (style & ES_WANTRETURN)
 264     m_windowStyle |= wxTE_PROCESS_ENTER;
 265 }
 266
 267 void wxTextCtrl::SetupColours(void)
 268 {
 269   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 270   SetForegroundColour(GetParent()->GetForegroundColour());
 271 }
 272
 273 wxString wxTextCtrl::GetValue(void) const
 274 {
 275     int length = GetWindowTextLength((HWND) GetHWND());
 276     char *s = new char[length+1];
 277     GetWindowText((HWND) GetHWND(), s, length+1);
 278     wxString str(s);
 279     delete[] s;
 280   return str;
 281 }
 282
 283 void wxTextCtrl::SetValue(const wxString& value)
 284 {
 285   // If newlines are denoted by just 10, must stick 13 in front.
 286   int singletons = 0;
 287   int len = value.Length();
 288   int i;
 289   for (i = 0; i < len; i ++)
 290   {
 291     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 292       singletons ++;
 293   }
 294   if (singletons > 0)
 295   {
 296     char *tmp = new char[len + singletons + 1];
 297     int j = 0;
 298     for (i = 0; i < len; i ++)
 299     {
 300       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 301       {
 302         tmp[j] = 13;
 303         j ++;
 304       }
 305       tmp[j] = value[i];
 306       j ++;
 307     }
 308     tmp[j] = 0;
 309     SetWindowText((HWND) GetHWND(), tmp);
 310     delete[] tmp;
 311   }
 312   else
 313     SetWindowText((HWND) GetHWND(), (const char *)value);
 314 }
 315
 316 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 317 {
 318   int currentX, currentY;
 319   GetPosition(&currentX, &currentY);
 320   int x1 = x;
 321   int y1 = y;
 322   int w1 = width;
 323   int h1 = height;
 324
 325   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 326     x1 = currentX;
 327   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 328     y1 = currentY;
 329
 330   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 331
 332   int cx; // button font dimensions
 333   int cy;
 334
 335   wxGetCharSize(GetHWND(), &cx, &cy, & GetFont());
 336
 337   int control_width, control_height, control_x, control_y;
 338
 339   // If we're prepared to use the existing size, then...
 340   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 341   {
 342     GetSize(&w1, &h1);
 343   }
 344
 345   // Deal with default size (using -1 values)
 346   if (w1<=0)
 347     w1 = DEFAULT_ITEM_WIDTH;
 348
 349   control_x = x1;
 350   control_y = y1;
 351   control_width = w1;
 352   control_height = h1;
 353
 354   // Calculations may have made text size too small
 355   if (control_height <= 0)
 356     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 357
 358   if (control_width <= 0)
 359     control_width = DEFAULT_ITEM_WIDTH;
 360
 361   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 362                               (int)control_width, (int)control_height, TRUE);
 363 }
 364
 365 // Clipboard operations
 366 void wxTextCtrl::Copy(void)
 367 {
 368   HWND hWnd = (HWND) GetHWND();
 369   SendMessage(hWnd, WM_COPY, 0, 0L);
 370 }
 371
 372 void wxTextCtrl::Cut(void)
 373 {
 374   HWND hWnd = (HWND) GetHWND();
 375   SendMessage(hWnd, WM_CUT, 0, 0L);
 376 }
 377
 378 void wxTextCtrl::Paste(void)
 379 {
 380   HWND hWnd = (HWND) GetHWND();
 381   SendMessage(hWnd, WM_PASTE, 0, 0L);
 382 }
 383
 384 void wxTextCtrl::SetEditable(bool editable)
 385 {
 386   HWND hWnd = (HWND) GetHWND();
 387   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 388 }
 389
 390 void wxTextCtrl::SetInsertionPoint(long pos)
 391 {
 392   HWND hWnd = (HWND) GetHWND();
 393 #ifdef __WIN32__
 394 #if defined(__WIN95__)
 395   if ( m_isRich)
 396   {
 397     CHARRANGE range;
 398     range.cpMin = pos;
 399     range.cpMax = pos;
 400     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 401     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 402   }
 403   else
 404 #endif
 405   {
 406     SendMessage(hWnd, EM_SETSEL, pos, pos);
 407     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 408   }
 409 #else
 410   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 411 #endif
 412   char *nothing = "";
 413   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 414 }
 415
 416 void wxTextCtrl::SetInsertionPointEnd(void)
 417 {
 418   long pos = GetLastPosition();
 419   SetInsertionPoint(pos);
 420 }
 421
 422 long wxTextCtrl::GetInsertionPoint(void) const
 423 {
 424 #if defined(__WIN95__)
 425   if (m_isRich)
 426   {
 427     CHARRANGE range;
 428     range.cpMin = 0;
 429     range.cpMax = 0;
 430     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 431     return range.cpMin;
 432   }
 433 #endif
 434
 435   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 436   return Pos&0xFFFF;
 437 }
 438
 439 long wxTextCtrl::GetLastPosition(void) const
 440 {
 441     HWND hWnd = (HWND) GetHWND();
 442
 443     // Will always return a number > 0 (according to docs)
 444     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 445
 446     // This gets the char index for the _beginning_ of the last line
 447     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 448
 449     // Get number of characters in the last line. We'll add this to the character
 450     // index for the last line, 1st position.
 451     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 452
 453     return (long)(charIndex + lineLength);
 454 }
 455
 456 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 457 {
 458     HWND hWnd = (HWND) GetHWND();
 459     long fromChar = from;
 460     long toChar = to;
 461
 462     // Set selection and remove it
 463 #ifdef __WIN32__
 464     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 465 #else
 466     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 467 #endif
 468     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 469
 470     // Now replace with 'value', by pasting.
 471     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 472
 473     // Paste into edit control
 474     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 475 }
 476
 477 void wxTextCtrl::Remove(long from, long to)
 478 {
 479     HWND hWnd = (HWND) GetHWND();
 480     long fromChar = from;
 481     long toChar = to;
 482
 483     // Cut all selected text
 484 #ifdef __WIN32__
 485     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 486 #else
 487     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 488 #endif
 489     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 490 }
 491
 492 void wxTextCtrl::SetSelection(long from, long to)
 493 {
 494     HWND hWnd = (HWND) GetHWND();
 495     long fromChar = from;
 496     long toChar = to;
 497     // if from and to are both -1, it means
 498     // (in wxWindows) that all text should be selected.
 499     // This translates into Windows convention
 500     if ((from == -1) && (to == -1))
 501     {
 502       fromChar = 0;
 503       toChar = -1;
 504     }
 505
 506 #ifdef __WIN32__
 507     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 508     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 509 #else
 510     // WPARAM is 0: selection is scrolled into view
 511     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 512 #endif
 513 }
 514
 515 bool wxTextCtrl::LoadFile(const wxString& file)
 516 {
 517   if (!FileExists(WXSTRINGCAST file))
 518     return FALSE;
 519
 520   m_fileName = file;
 521
 522   Clear();
 523
 524 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 525   ifstream input(WXSTRINGCAST file, ios::in);
 526
 527   if (!input.bad())
 528   {
 529       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 530       // line by line into the control. Apart from being very slow this
 531       // was limited to 32K of text by the external interface presenting
 532       // positions as signed shorts. Now load in one chunk...
 533       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 534
 535       struct stat stat_buf;
 536       if (stat(file, &stat_buf) < 0)
 537         return FALSE;
 538 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 539       // This may need to be a bigger buffer than the file size suggests,
 540       // if it's a UNIX file. Give it an extra 1000 just in case.
 541       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 542       long no_lines = 0;
 543       long pos = 0;
 544       while (!input.eof() && input.peek() != EOF)
 545       {
 546         input.getline(wxBuffer, 500);
 547   int len = strlen(wxBuffer);
 548   wxBuffer[len] = 13;
 549   wxBuffer[len+1] = 10;
 550   wxBuffer[len+2] = 0;
 551   strcpy(tmp_buffer+pos, wxBuffer);
 552   pos += strlen(wxBuffer);
 553   no_lines++;
 554       }
 555
 556 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 557       SetWindowText((HWND) GetHWND(), tmp_buffer);
 558       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 559       farfree(tmp_buffer);
 560
 561       return TRUE;
 562   }
 563   return FALSE;
 564 }
 565
 566 // If file is null, try saved file name first
 567 // Returns TRUE if succeeds.
 568 bool wxTextCtrl::SaveFile(const wxString& file)
 569 {
 570   wxString theFile(file);
 571   if (theFile == "")
 572     theFile = m_fileName;
 573   if (theFile == "")
 574     return FALSE;
 575   m_fileName = theFile;
 576
 577   ofstream output((char*) (const char*) theFile);
 578   if (output.bad())
 579   return FALSE;
 580
 581     // This will only save 64K max
 582     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 583     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 584     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 585     char *pstr = tmp_buffer;
 586
 587   // Convert \r\n to just \n
 588   while (*pstr)
 589   {
 590     if (*pstr != '\r')
 591       output << *pstr;
 592     pstr++;
 593   }
 594
 595     farfree(tmp_buffer);
 596     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 597
 598     return TRUE;
 599 }
 600
 601 void wxTextCtrl::WriteText(const wxString& text)
 602 {
 603     // Covert \n to \r\n
 604     int len = text.Length();
 605     char *newtext = new char[(len*2)+1];
 606     int i = 0;
 607     int j = 0;
 608     while (i < len)
 609     {
 610       if (text[i] == '\n')
 611       {
 612         newtext[j] = '\r';
 613         j ++;
 614       }
 615       newtext[j] = text[i];
 616       i ++;
 617       j ++;
 618     }
 619     newtext[j] = 0;
 620     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 621     delete[] newtext;
 622 }
 623
 624 void wxTextCtrl::Clear(void)
 625 {
 626 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 627     SetWindowText((HWND) GetHWND(), "");
 628 }
 629
 630 bool wxTextCtrl::IsModified(void) const
 631 {
 632     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 633 }
 634
 635 // Makes 'unmodified'
 636 void wxTextCtrl::DiscardEdits(void)
 637 {
 638   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 639 }
 640
 641 /*
 642  * Some of the following functions are yet to be implemented
 643  *
 644  */
 645
 646 int wxTextCtrl::GetNumberOfLines(void) const
 647 {
 648     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 649 }
 650
 651 long wxTextCtrl::XYToPosition(long x, long y) const
 652 {
 653     HWND hWnd = (HWND) GetHWND();
 654
 655     // This gets the char index for the _beginning_ of this line
 656     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 657     return (long)(x + charIndex);
 658 }
 659
 660 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 661 {
 662     HWND hWnd = (HWND) GetHWND();
 663
 664     // This gets the line number containing the character
 665     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 666     // This gets the char index for the _beginning_ of this line
 667     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 668     // The X position must therefore be the different between pos and charIndex
 669     *x = (long)(pos - charIndex);
 670     *y = (long)lineNo;
 671 }
 672
 673 void wxTextCtrl::ShowPosition(long pos)
 674 {
 675     HWND hWnd = (HWND) GetHWND();
 676
 677     // To scroll to a position, we pass the number of lines and characters
 678     // to scroll *by*. This means that we need to:
 679     // (1) Find the line position of the current line.
 680     // (2) Find the line position of pos.
 681     // (3) Scroll by (pos - current).
 682     // For now, ignore the horizontal scrolling.
 683
 684     // Is this where scrolling is relative to - the line containing the caret?
 685     // Or is the first visible line??? Try first visible line.
 686 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 687
 688     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 689
 690     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 691
 692     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 693
 694 /*
 695     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 696       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 697 */
 698
 699     if (linesToScroll != 0)
 700       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 701 }
 702
 703 int wxTextCtrl::GetLineLength(long lineNo) const
 704 {
 705     long charIndex = XYToPosition(0, lineNo);
 706     HWND hWnd = (HWND) GetHWND();
 707     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 708     return len;
 709 }
 710
 711 wxString wxTextCtrl::GetLineText(long lineNo) const
 712 {
 713     HWND hWnd = (HWND) GetHWND();
 714     *(WORD *)wxBuffer = 512;
 715     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 716     wxBuffer[noChars] = 0;
 717   return wxString(wxBuffer);
 718 }
 719
 720 /*
 721  * Text item
 722  */
 723
 724 void wxTextCtrl::Command(wxCommandEvent & event)
 725 {
 726   SetValue (event.GetString());
 727   ProcessCommand (event);
 728 }
 729
 730 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 731 {
 732   // By default, load the first file into the text window.
 733   if (event.GetNumberOfFiles() > 0)
 734   {
 735     LoadFile(event.GetFiles()[0]);
 736   }
 737 }
 738
 739 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 740 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 741
 742 //=========================================================================
 743 // Called then the buffer is full (gcc 2.6.3)
 744 // or when "endl" is output (Borland 4.5)
 745 //=========================================================================
 746 // Class declaration using multiple inheritance doesn't work properly for
 747 // Borland. See note in wb_text.h.
 748 #ifndef NO_TEXT_WINDOW_STREAM
 749 int wxTextCtrl::overflow(int c)
 750 {
 751   // Make sure there is a holding area
 752   // this is not needed in <iostream> usage as it automagically allocates
 753   // it, but does someone want to emulate it for safety's sake?
 754 #if wxUSE_IOSTREAMH
 755   if ( allocate()==EOF )
 756   {
 757     wxError("Streambuf allocation failed","Internal error");
 758     return EOF;
 759   }
 760 #endif
 761
 762   // Verify that there are no characters in get area
 763   if ( gptr() && gptr() < egptr() )
 764   {
 765      wxError("Who's trespassing my get area?","Internal error");
 766      return EOF;
 767   }
 768
 769   // Reset get area
 770   setg(0,0,0);
 771
 772   // Make sure there is a put area
 773   if ( ! pptr() )
 774   {
 775 /* This doesn't seem to be fatal so comment out error message */
 776 //    wxError("Put area not opened","Internal error");
 777
 778 #if wxUSE_IOSTREAMH
 779           setp( base(), base() );
 780 #else
 781           setp( pbase(), pbase() );
 782 #endif
 783   }
 784
 785   // Determine how many characters have been inserted but no consumed
 786   int plen = pptr() - pbase();
 787
 788   // Now Jerry relies on the fact that the buffer is at least 2 chars
 789   // long, but the holding area "may be as small as 1" ???
 790   // And we need an additional \0, so let's keep this inefficient but
 791   // safe copy.
 792
 793   // If c!=EOF, it is a character that must also be comsumed
 794   int xtra = c==EOF? 0 : 1;
 795
 796   // Write temporary C-string to wxTextWindow
 797   {
 798   char *txt = new char[plen+xtra+1];
 799   memcpy(txt, pbase(), plen);
 800   txt[plen] = (char)c;     // append c
 801   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 802     // If the put area already contained \0, output will be truncated there
 803   WriteText(txt);
 804     delete[] txt;
 805   }
 806
 807   // Reset put area
 808   setp(pbase(), epptr());
 809
 810 #if defined(__WATCOMC__)
 811   return __NOT_EOF;
 812 #elif defined(zapeof)     // HP-UX (all cfront based?)
 813   return zapeof(c);
 814 #else
 815   return c!=EOF ? c : 0;  // this should make everybody happy
 816 #endif
 817
 818 /* OLD CODE
 819   int len = pptr() - pbase();
 820   char *txt = new char[len+1];
 821   strncpy(txt, pbase(), len);
 822   txt[len] = '\0';
 823   (*this) << txt;
 824   setp(pbase(), epptr());
 825   delete[] txt;
 826   return EOF;
 827 */
 828 }
 829
 830 //=========================================================================
 831 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 832 //=========================================================================
 833 int wxTextCtrl::sync(void)
 834 {
 835   // Verify that there are no characters in get area
 836   if ( gptr() && gptr() < egptr() )
 837   {
 838      wxError("Who's trespassing my get area?","Internal error");
 839      return EOF;
 840   }
 841
 842   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 843
 844   return 0;
 845 /* OLD CODE
 846   int len = pptr() - pbase();
 847   char *txt = new char[len+1];
 848   strncpy(txt, pbase(), len);
 849   txt[len] = '\0';
 850   (*this) << txt;
 851   setp(pbase(), epptr());
 852   delete[] txt;
 853   return 0;
 854 */
 855 }
 856
 857 //=========================================================================
 858 // Should not be called by a "ostream". Used by a "istream"
 859 //=========================================================================
 860 int wxTextCtrl::underflow(void)
 861 {
 862   return EOF;
 863 }
 864 #endif
 865
 866 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 867 {
 868   WriteText(s);
 869   return *this;
 870 }
 871
 872 wxTextCtrl& wxTextCtrl::operator<<(float f)
 873 {
 874     wxString str;
 875     str.Printf("%.2f", f);
 876     WriteText(str);
 877     return *this;
 878 }
 879
 880 wxTextCtrl& wxTextCtrl::operator<<(double d)
 881 {
 882     wxString str;
 883     str.Printf("%.2f", d);
 884     WriteText(str);
 885     return *this;
 886 }
 887
 888 wxTextCtrl& wxTextCtrl::operator<<(int i)
 889 {
 890     wxString str;
 891     str.Printf("%d", i);
 892     WriteText(str);
 893     return *this;
 894 }
 895
 896 wxTextCtrl& wxTextCtrl::operator<<(long i)
 897 {
 898     wxString str;
 899     str.Printf("%ld", i);
 900     WriteText(str);
 901     return *this;
 902 }
 903
 904 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 905 {
 906     char buf[2];
 907
 908     buf[0] = c;
 909     buf[1] = 0;
 910     WriteText(buf);
 911     return *this;
 912 }
 913
 914 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 915       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 916 {
 917 #if CTL3D
 918   if ( m_useCtl3D )
 919   {
 920     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 921     return (WXHBRUSH) hbrush;
 922   }
 923 #endif
 924
 925   if (GetParent()->GetTransparentBackground())
 926     SetBkMode((HDC) pDC, TRANSPARENT);
 927   else
 928     SetBkMode((HDC) pDC, OPAQUE);
 929
 930   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 931   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 932
 933   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 934
 935   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 936   // has a zero usage count.
 937   // NOT NOW - will be cleaned up at end of app.
 938 //  backgroundBrush->RealizeResource();
 939   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 940 }
 941
 942 void wxTextCtrl::OnChar(wxKeyEvent& event)
 943 {
 944     // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 945   switch(event.KeyCode())
 946   {
 947   case '{':
 948   case '}':
 949   case '[':
 950   case ']':
 951   case '|':
 952   case '~':
 953   case '\\':
 954    {
 955     char c=(char)event.KeyCode();
 956     *this << c;
 957    }
 958    break;
 959   }
 960   if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 961   {
 962     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 963     event.SetEventObject( this );
 964     if ( GetEventHandler()->ProcessEvent(event) )
 965       return;
 966   }
 967   else if ( event.KeyCode() == WXK_TAB ) {
 968     wxNavigationKeyEvent event;
 969     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 970     event.SetWindowChange(FALSE);
 971     event.SetEventObject(this);
 972
 973     if ( GetEventHandler()->ProcessEvent(event) )
 974       return;
 975   }
 976
 977   event.Skip();
 978 }
 979
 980 long wxTextCtrl::MSWGetDlgCode()
 981 {
 982   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 983   if ( m_windowStyle & wxPROCESS_ENTER )
 984     lRc |= DLGC_WANTMESSAGE;
 985   else if ( m_windowStyle & wxTE_MULTILINE )
 986     lRc |= DLGC_WANTMESSAGE;
 987
 988   return lRc;
 989 }
 990
 991 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 992 {
 993     if ( m_windowStyle & wxTE_MULTILINE )
 994     {
 995         // No flicker - only problem is we probably can't change the background
 996         Default();
 997 /*
 998         RECT rect;
 999         ::GetClientRect((HWND) GetHWND(), &rect);
1000
1001         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1002         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1003
1004         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1005         ::DeleteObject(hBrush);
1006         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1007 */
1008     }
1009 //        wxWindow::OnEraseBackground(event);
1010 }
1011
1012 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1013 {
1014 /*
1015   // Debugging
1016   wxDebugMsg("Edit control %d: ", (int)id);
1017   switch (param)
1018   {
1019     case EN_SETFOCUS:
1020       wxDebugMsg("EN_SETFOCUS\n");
1021       break;
1022     case EN_KILLFOCUS:
1023       wxDebugMsg("EN_KILLFOCUS\n");
1024       break;
1025     case EN_CHANGE:
1026       wxDebugMsg("EN_CHANGE\n");
1027       break;
1028     case EN_UPDATE:
1029       wxDebugMsg("EN_UPDATE\n");
1030       break;
1031     case EN_ERRSPACE:
1032       wxDebugMsg("EN_ERRSPACE\n");
1033       break;
1034     case EN_MAXTEXT:
1035       wxDebugMsg("EN_MAXTEXT\n");
1036       break;
1037     case EN_HSCROLL:
1038       wxDebugMsg("EN_HSCROLL\n");
1039       break;
1040     case EN_VSCROLL:
1041       wxDebugMsg("EN_VSCROLL\n");
1042       break;
1043     default:
1044       wxDebugMsg("Unknown EDIT notification\n");
1045       break;
1046   }
1047 */
1048   switch (param)
1049   {
1050     case EN_SETFOCUS:
1051     case EN_KILLFOCUS:
1052       {
1053         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1054                                                  : wxEVT_SET_FOCUS,
1055                            m_windowId);
1056         event.SetEventObject( this );
1057         GetEventHandler()->ProcessEvent(event);
1058       }
1059       break;
1060
1061     case EN_CHANGE:
1062       {
1063         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1064         wxString val(GetValue());
1065         if ( !val.IsNull() )
1066           event.m_commandString = WXSTRINGCAST val;
1067         event.SetEventObject( this );
1068         ProcessCommand(event);
1069       }
1070       break;
1071
1072     // the other notification messages are not processed
1073     case EN_UPDATE:
1074     case EN_ERRSPACE:
1075     case EN_MAXTEXT:
1076     case EN_HSCROLL:
1077     case EN_VSCROLL:
1078     default:
1079       return FALSE;
1080   }
1081
1082   // processed
1083   return TRUE;
1084 }
1085
1086
1087 // For Rich Edit controls. Do we need it?
1088 #if 0
1089 #if defined(__WIN95__)
1090 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1091 {
1092   wxCommandEvent event(0, m_windowId);
1093   int eventType = 0;
1094   NMHDR *hdr1 = (NMHDR *) lParam;
1095   switch ( hdr1->code )
1096   {
1097     // Insert case code here
1098     default :
1099       return wxControl::MSWNotify(wParam, lParam);
1100       break;
1101   }
1102
1103   event.SetEventObject( this );
1104   event.SetEventType(eventType);
1105
1106   if ( !GetEventHandler()->ProcessEvent(event) )
1107     return FALSE;
1108
1109     return TRUE;
1110 }
1111 #endif
1112 #endif
1113