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 #include <sys/stat.h>
  49 #if defined(__BORLANDC__) && !defined(__WIN32__)
  50 #include <alloc.h>
  51 #else
  52 #ifndef __GNUWIN32__
  53 #include <malloc.h>
  54 #endif
  55 #define farmalloc malloc
  56 #define farfree free
  57 #endif
  58 #include <windowsx.h>
  59
  60 #include <string.h>
  61
  62 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  63 #include <richedit.h>
  64 #endif
  65
  66 #if !USE_SHARED_LIBRARY
  67 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  68
  69 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  70   EVT_CHAR(wxTextCtrl::OnChar)
  71   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  72   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  73 END_EVENT_TABLE()
  74
  75 #endif
  76
  77 // Text item
  78 wxTextCtrl::wxTextCtrl(void)
  79 #ifndef NO_TEXT_WINDOW_STREAM
  80  :streambuf()
  81 #endif
  82 {
  83   m_fileName = "";
  84   m_isRich = FALSE;
  85 }
  86
  87 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  88                         const wxString& value,
  89                         const wxPoint& pos,
  90                         const wxSize& size, long style,
  91                         const wxValidator& validator,
  92                         const wxString& name)
  93 {
  94   m_fileName = "";
  95   SetName(name);
  96   SetValidator(validator);
  97   if (parent) parent->AddChild(this);
  98
  99   m_windowStyle = style;
 100
 101   // Should this be taken from the system colours?
 102 //  SetBackgroundColour(wxColour(255, 255, 255));
 103
 104   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 105
 106   SetForegroundColour(parent->GetForegroundColour()) ;
 107
 108   if ( id == -1 )
 109     m_windowId = (int)NewControlId();
 110   else
 111   m_windowId = id;
 112
 113   int x = pos.x;
 114   int y = pos.y;
 115   int width = size.x;
 116   int height = size.y;
 117
 118 #ifdef __WIN32__
 119   WXHGLOBAL m_globalHandle = 0;
 120 #else
 121   // Obscure method from the MS Developer's Network Disk for
 122   // using global memory instead of the local heap, which
 123   // runs out far too soon. Solves the problem with
 124   // failing to appear.
 125
 126   // Doesn't seem to work for Win95, so removing.
 127   m_globalHandle=0;
 128 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 129 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 130 //                         256L);
 131 #endif
 132
 133   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 134   if (m_windowStyle & wxTE_MULTILINE)
 135   msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 136   else
 137     msStyle |= ES_AUTOHSCROLL ;
 138
 139   if (m_windowStyle & wxTE_READONLY)
 140     msStyle |= ES_READONLY;
 141
 142   if (m_windowStyle & wxHSCROLL)
 143     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 144   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 145     msStyle |= ES_PASSWORD;
 146
 147   char *windowClass = "EDIT";
 148 #if defined(__WIN95__)
 149   if ( m_windowStyle & wxTE_MULTILINE )
 150   {
 151     msStyle |= ES_AUTOVSCROLL;
 152     m_isRich = TRUE;
 153     windowClass = "RichEdit" ;
 154   }
 155   else
 156 #endif
 157     m_isRich = FALSE;
 158
 159   bool want3D;
 160   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 161
 162   // If we're in Win95, and we want a simple 2D border,
 163   // then make it an EDIT control instead.
 164 #if defined(__WIN95__)
 165   if (m_windowStyle & wxSIMPLE_BORDER)
 166   {
 167     windowClass = "EDIT";
 168   m_isRich = FALSE;
 169   }
 170 #endif
 171
 172   // Even with extended styles, need to combine with WS_BORDER
 173   // for them to look right.
 174   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 175     msStyle |= WS_BORDER;
 176
 177   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 178                         msStyle,
 179                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 180                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 181
 182   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 183
 184 #if CTL3D
 185   if ( want3D )
 186   {
 187     Ctl3dSubclassCtl((HWND)m_hWnd);
 188     m_useCtl3D = TRUE;
 189   }
 190 #endif
 191
 192 #if defined(__WIN95__)
 193   if (m_isRich)
 194   {
 195     // Have to enable events
 196     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 197                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 198   }
 199 #endif
 200
 201   SubclassWin(GetHWND());
 202
 203   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 204   {
 205     SetFont(parent->GetFont());
 206   }
 207   else
 208   {
 209     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 210   }
 211
 212   SetSize(x, y, width, height);
 213
 214   // Causes a crash for Symantec C++ and WIN32 for some reason
 215 #if !(defined(__SC__) && defined(__WIN32__))
 216   if ( !value.IsEmpty() )
 217   {
 218     SetValue(value);
 219   }
 220 #endif
 221
 222   return TRUE;
 223 }
 224
 225 // Make sure the window style (etc.) reflects the HWND style (roughly)
 226 void wxTextCtrl::AdoptAttributesFromHWND(void)
 227 {
 228   wxWindow::AdoptAttributesFromHWND();
 229
 230   HWND hWnd = (HWND) GetHWND();
 231   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 232
 233     char buf[256];
 234
 235 #ifndef __WIN32__
 236   GetClassName((HWND) hWnd, buf, 256);
 237 #else
 238 #ifdef UNICODE
 239   GetClassNameW((HWND) hWnd, buf, 256);
 240 #else
 241   GetClassNameA((HWND) hWnd, buf, 256);
 242 #endif
 243 #endif
 244
 245   wxString str(buf);
 246   str.UpperCase();
 247
 248   if (str == "EDIT")
 249     m_isRich = FALSE;
 250   else
 251     m_isRich = TRUE;
 252
 253   if (style & ES_MULTILINE)
 254     m_windowStyle |= wxTE_MULTILINE;
 255   if (style & ES_PASSWORD)
 256     m_windowStyle |= wxTE_PASSWORD;
 257   if (style & ES_READONLY)
 258     m_windowStyle |= wxTE_READONLY;
 259   if (style & ES_WANTRETURN)
 260     m_windowStyle |= wxTE_PROCESS_ENTER;
 261 }
 262
 263 void wxTextCtrl::SetupColours(void)
 264 {
 265   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 266   SetForegroundColour(GetParent()->GetForegroundColour());
 267 }
 268
 269 wxString wxTextCtrl::GetValue(void) const
 270 {
 271     int length = GetWindowTextLength((HWND) GetHWND());
 272     char *s = new char[length+1];
 273     GetWindowText((HWND) GetHWND(), s, length+1);
 274     wxString str(s);
 275     delete[] s;
 276   return str;
 277 }
 278
 279 void wxTextCtrl::SetValue(const wxString& value)
 280 {
 281   // If newlines are denoted by just 10, must stick 13 in front.
 282   int singletons = 0;
 283   int len = value.Length();
 284   int i;
 285   for (i = 0; i < len; i ++)
 286   {
 287     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 288       singletons ++;
 289   }
 290   if (singletons > 0)
 291   {
 292     char *tmp = new char[len + singletons + 1];
 293     int j = 0;
 294     for (i = 0; i < len; i ++)
 295     {
 296       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 297       {
 298         tmp[j] = 13;
 299         j ++;
 300       }
 301       tmp[j] = value[i];
 302       j ++;
 303     }
 304     tmp[j] = 0;
 305     SetWindowText((HWND) GetHWND(), tmp);
 306     delete[] tmp;
 307   }
 308   else
 309     SetWindowText((HWND) GetHWND(), (const char *)value);
 310 }
 311
 312 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 313 {
 314   int currentX, currentY;
 315   GetPosition(&currentX, &currentY);
 316   int x1 = x;
 317   int y1 = y;
 318   int w1 = width;
 319   int h1 = height;
 320
 321   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 322     x1 = currentX;
 323   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 324     y1 = currentY;
 325
 326   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 327
 328   int cx; // button font dimensions
 329   int cy;
 330
 331   wxGetCharSize(GetHWND(), &cx, &cy, & GetFont());
 332
 333   int control_width, control_height, control_x, control_y;
 334
 335   // If we're prepared to use the existing size, then...
 336   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 337   {
 338     GetSize(&w1, &h1);
 339   }
 340
 341   // Deal with default size (using -1 values)
 342   if (w1<=0)
 343     w1 = DEFAULT_ITEM_WIDTH;
 344
 345   control_x = x1;
 346   control_y = y1;
 347   control_width = w1;
 348   control_height = h1;
 349
 350   // Calculations may have made text size too small
 351   if (control_height <= 0)
 352     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 353
 354   if (control_width <= 0)
 355     control_width = DEFAULT_ITEM_WIDTH;
 356
 357   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 358                               (int)control_width, (int)control_height, TRUE);
 359 }
 360
 361 // Clipboard operations
 362 void wxTextCtrl::Copy(void)
 363 {
 364   HWND hWnd = (HWND) GetHWND();
 365   SendMessage(hWnd, WM_COPY, 0, 0L);
 366 }
 367
 368 void wxTextCtrl::Cut(void)
 369 {
 370   HWND hWnd = (HWND) GetHWND();
 371   SendMessage(hWnd, WM_CUT, 0, 0L);
 372 }
 373
 374 void wxTextCtrl::Paste(void)
 375 {
 376   HWND hWnd = (HWND) GetHWND();
 377   SendMessage(hWnd, WM_PASTE, 0, 0L);
 378 }
 379
 380 void wxTextCtrl::SetEditable(bool editable)
 381 {
 382   HWND hWnd = (HWND) GetHWND();
 383   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 384 }
 385
 386 void wxTextCtrl::SetInsertionPoint(long pos)
 387 {
 388   HWND hWnd = (HWND) GetHWND();
 389 #ifdef __WIN32__
 390 #if defined(__WIN95__)
 391   if ( m_isRich)
 392   {
 393     CHARRANGE range;
 394     range.cpMin = pos;
 395     range.cpMax = pos;
 396     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 397     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 398   }
 399   else
 400 #endif
 401   {
 402     SendMessage(hWnd, EM_SETSEL, pos, pos);
 403     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 404   }
 405 #else
 406   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 407 #endif
 408   char *nothing = "";
 409   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 410 }
 411
 412 void wxTextCtrl::SetInsertionPointEnd(void)
 413 {
 414   long pos = GetLastPosition();
 415   SetInsertionPoint(pos);
 416 }
 417
 418 long wxTextCtrl::GetInsertionPoint(void) const
 419 {
 420 #if defined(__WIN95__)
 421   if (m_isRich)
 422   {
 423     CHARRANGE range;
 424     range.cpMin = 0;
 425     range.cpMax = 0;
 426     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 427     return range.cpMin;
 428   }
 429 #endif
 430
 431   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 432   return Pos&0xFFFF;
 433 }
 434
 435 long wxTextCtrl::GetLastPosition(void) const
 436 {
 437     HWND hWnd = (HWND) GetHWND();
 438
 439     // Will always return a number > 0 (according to docs)
 440     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 441
 442     // This gets the char index for the _beginning_ of the last line
 443     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 444
 445     // Get number of characters in the last line. We'll add this to the character
 446     // index for the last line, 1st position.
 447     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 448
 449     return (long)(charIndex + lineLength);
 450 }
 451
 452 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 453 {
 454     HWND hWnd = (HWND) GetHWND();
 455     long fromChar = from;
 456     long toChar = to;
 457
 458     // Set selection and remove it
 459 #ifdef __WIN32__
 460     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 461 #else
 462     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 463 #endif
 464     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 465
 466     // Now replace with 'value', by pasting.
 467     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 468
 469     // Paste into edit control
 470     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 471 }
 472
 473 void wxTextCtrl::Remove(long from, long to)
 474 {
 475     HWND hWnd = (HWND) GetHWND();
 476     long fromChar = from;
 477     long toChar = to;
 478
 479     // Cut all selected text
 480 #ifdef __WIN32__
 481     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 482 #else
 483     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 484 #endif
 485     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 486 }
 487
 488 void wxTextCtrl::SetSelection(long from, long to)
 489 {
 490     HWND hWnd = (HWND) GetHWND();
 491     long fromChar = from;
 492     long toChar = to;
 493     // if from and to are both -1, it means
 494     // (in wxWindows) that all text should be selected.
 495     // This translates into Windows convention
 496     if ((from == -1) && (to == -1))
 497     {
 498       fromChar = 0;
 499       toChar = -1;
 500     }
 501
 502 #ifdef __WIN32__
 503     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 504     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 505 #else
 506     // WPARAM is 0: selection is scrolled into view
 507     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 508 #endif
 509 }
 510
 511 bool wxTextCtrl::LoadFile(const wxString& file)
 512 {
 513   if (!FileExists(WXSTRINGCAST file))
 514     return FALSE;
 515
 516   m_fileName = file;
 517
 518   Clear();
 519
 520 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 521   ifstream input(WXSTRINGCAST file, ios::in);
 522
 523   if (!input.bad())
 524   {
 525       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 526       // line by line into the control. Apart from being very slow this
 527       // was limited to 32K of text by the external interface presenting
 528       // positions as signed shorts. Now load in one chunk...
 529       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 530
 531       struct stat stat_buf;
 532       if (stat(file, &stat_buf) < 0)
 533         return FALSE;
 534 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 535       // This may need to be a bigger buffer than the file size suggests,
 536       // if it's a UNIX file. Give it an extra 1000 just in case.
 537       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 538       long no_lines = 0;
 539       long pos = 0;
 540       while (!input.eof() && input.peek() != EOF)
 541       {
 542         input.getline(wxBuffer, 500);
 543   int len = strlen(wxBuffer);
 544   wxBuffer[len] = 13;
 545   wxBuffer[len+1] = 10;
 546   wxBuffer[len+2] = 0;
 547   strcpy(tmp_buffer+pos, wxBuffer);
 548   pos += strlen(wxBuffer);
 549   no_lines++;
 550       }
 551
 552 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 553       SetWindowText((HWND) GetHWND(), tmp_buffer);
 554       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 555       farfree(tmp_buffer);
 556
 557       return TRUE;
 558   }
 559   return FALSE;
 560 }
 561
 562 // If file is null, try saved file name first
 563 // Returns TRUE if succeeds.
 564 bool wxTextCtrl::SaveFile(const wxString& file)
 565 {
 566   wxString theFile(file);
 567   if (theFile == "")
 568     theFile = m_fileName;
 569   if (theFile == "")
 570     return FALSE;
 571   m_fileName = theFile;
 572
 573   ofstream output((char*) (const char*) theFile);
 574   if (output.bad())
 575   return FALSE;
 576
 577     // This will only save 64K max
 578     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 579     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 580     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 581     char *pstr = tmp_buffer;
 582
 583   // Convert \r\n to just \n
 584   while (*pstr)
 585   {
 586     if (*pstr != '\r')
 587       output << *pstr;
 588     pstr++;
 589   }
 590
 591     farfree(tmp_buffer);
 592     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 593
 594     return TRUE;
 595 }
 596
 597 void wxTextCtrl::WriteText(const wxString& text)
 598 {
 599     // Covert \n to \r\n
 600     int len = text.Length();
 601     char *newtext = new char[(len*2)+1];
 602     int i = 0;
 603     int j = 0;
 604     while (i < len)
 605     {
 606       if (text[i] == '\n')
 607       {
 608         newtext[j] = '\r';
 609         j ++;
 610       }
 611       newtext[j] = text[i];
 612       i ++;
 613       j ++;
 614     }
 615     newtext[j] = 0;
 616     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 617     delete[] newtext;
 618 }
 619
 620 void wxTextCtrl::Clear(void)
 621 {
 622 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 623     SetWindowText((HWND) GetHWND(), "");
 624 }
 625
 626 bool wxTextCtrl::IsModified(void) const
 627 {
 628     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 629 }
 630
 631 // Makes 'unmodified'
 632 void wxTextCtrl::DiscardEdits(void)
 633 {
 634   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 635 }
 636
 637 /*
 638  * Some of the following functions are yet to be implemented
 639  *
 640  */
 641
 642 int wxTextCtrl::GetNumberOfLines(void) const
 643 {
 644     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 645 }
 646
 647 long wxTextCtrl::XYToPosition(long x, long y) const
 648 {
 649     HWND hWnd = (HWND) GetHWND();
 650
 651     // This gets the char index for the _beginning_ of this line
 652     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 653     return (long)(x + charIndex);
 654 }
 655
 656 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 657 {
 658     HWND hWnd = (HWND) GetHWND();
 659
 660     // This gets the line number containing the character
 661     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 662     // This gets the char index for the _beginning_ of this line
 663     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 664     // The X position must therefore be the different between pos and charIndex
 665     *x = (long)(pos - charIndex);
 666     *y = (long)lineNo;
 667 }
 668
 669 void wxTextCtrl::ShowPosition(long pos)
 670 {
 671     HWND hWnd = (HWND) GetHWND();
 672
 673     // To scroll to a position, we pass the number of lines and characters
 674     // to scroll *by*. This means that we need to:
 675     // (1) Find the line position of the current line.
 676     // (2) Find the line position of pos.
 677     // (3) Scroll by (pos - current).
 678     // For now, ignore the horizontal scrolling.
 679
 680     // Is this where scrolling is relative to - the line containing the caret?
 681     // Or is the first visible line??? Try first visible line.
 682 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 683
 684     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 685
 686     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 687
 688     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 689
 690 /*
 691     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 692       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 693 */
 694
 695     if (linesToScroll != 0)
 696       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 697 }
 698
 699 int wxTextCtrl::GetLineLength(long lineNo) const
 700 {
 701     long charIndex = XYToPosition(0, lineNo);
 702     HWND hWnd = (HWND) GetHWND();
 703     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 704     return len;
 705 }
 706
 707 wxString wxTextCtrl::GetLineText(long lineNo) const
 708 {
 709     HWND hWnd = (HWND) GetHWND();
 710     *(WORD *)wxBuffer = 512;
 711     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 712     wxBuffer[noChars] = 0;
 713   return wxString(wxBuffer);
 714 }
 715
 716 /*
 717  * Text item
 718  */
 719
 720 void wxTextCtrl::Command(wxCommandEvent & event)
 721 {
 722   SetValue (event.GetString());
 723   ProcessCommand (event);
 724 }
 725
 726 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 727 {
 728   // By default, load the first file into the text window.
 729   if (event.GetNumberOfFiles() > 0)
 730   {
 731     LoadFile(event.GetFiles()[0]);
 732   }
 733 }
 734
 735 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 736 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 737
 738 //=========================================================================
 739 // Called then the buffer is full (gcc 2.6.3)
 740 // or when "endl" is output (Borland 4.5)
 741 //=========================================================================
 742 // Class declaration using multiple inheritance doesn't work properly for
 743 // Borland. See note in wb_text.h.
 744 #ifndef NO_TEXT_WINDOW_STREAM
 745 int wxTextCtrl::overflow(int c)
 746 {
 747   // Make sure there is a holding area
 748   // this is not needed in <iostream> usage as it automagically allocates
 749   // it, but does someone want to emulate it for safety's sake?
 750 #if wxUSE_IOSTREAMH
 751   if ( allocate()==EOF )
 752   {
 753     wxError("Streambuf allocation failed","Internal error");
 754     return EOF;
 755   }
 756 #endif
 757
 758   // Verify that there are no characters in get area
 759   if ( gptr() && gptr() < egptr() )
 760   {
 761      wxError("Who's trespassing my get area?","Internal error");
 762      return EOF;
 763   }
 764
 765   // Reset get area
 766   setg(0,0,0);
 767
 768   // Make sure there is a put area
 769   if ( ! pptr() )
 770   {
 771 /* This doesn't seem to be fatal so comment out error message */
 772 //    wxError("Put area not opened","Internal error");
 773
 774 #if wxUSE_IOSTREAMH
 775           setp( base(), base() );
 776 #else
 777           setp( pbase(), pbase() );
 778 #endif
 779   }
 780
 781   // Determine how many characters have been inserted but no consumed
 782   int plen = pptr() - pbase();
 783
 784   // Now Jerry relies on the fact that the buffer is at least 2 chars
 785   // long, but the holding area "may be as small as 1" ???
 786   // And we need an additional \0, so let's keep this inefficient but
 787   // safe copy.
 788
 789   // If c!=EOF, it is a character that must also be comsumed
 790   int xtra = c==EOF? 0 : 1;
 791
 792   // Write temporary C-string to wxTextWindow
 793   {
 794   char *txt = new char[plen+xtra+1];
 795   memcpy(txt, pbase(), plen);
 796   txt[plen] = (char)c;     // append c
 797   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 798     // If the put area already contained \0, output will be truncated there
 799   WriteText(txt);
 800     delete[] txt;
 801   }
 802
 803   // Reset put area
 804   setp(pbase(), epptr());
 805
 806 #if defined(__WATCOMC__)
 807   return __NOT_EOF;
 808 #elif defined(zapeof)     // HP-UX (all cfront based?)
 809   return zapeof(c);
 810 #else
 811   return c!=EOF ? c : 0;  // this should make everybody happy
 812 #endif
 813
 814 /* OLD CODE
 815   int len = pptr() - pbase();
 816   char *txt = new char[len+1];
 817   strncpy(txt, pbase(), len);
 818   txt[len] = '\0';
 819   (*this) << txt;
 820   setp(pbase(), epptr());
 821   delete[] txt;
 822   return EOF;
 823 */
 824 }
 825
 826 //=========================================================================
 827 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 828 //=========================================================================
 829 int wxTextCtrl::sync(void)
 830 {
 831   // Verify that there are no characters in get area
 832   if ( gptr() && gptr() < egptr() )
 833   {
 834      wxError("Who's trespassing my get area?","Internal error");
 835      return EOF;
 836   }
 837
 838   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 839
 840   return 0;
 841 /* OLD CODE
 842   int len = pptr() - pbase();
 843   char *txt = new char[len+1];
 844   strncpy(txt, pbase(), len);
 845   txt[len] = '\0';
 846   (*this) << txt;
 847   setp(pbase(), epptr());
 848   delete[] txt;
 849   return 0;
 850 */
 851 }
 852
 853 //=========================================================================
 854 // Should not be called by a "ostream". Used by a "istream"
 855 //=========================================================================
 856 int wxTextCtrl::underflow(void)
 857 {
 858   return EOF;
 859 }
 860 #endif
 861
 862 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 863 {
 864   WriteText(s);
 865   return *this;
 866 }
 867
 868 wxTextCtrl& wxTextCtrl::operator<<(float f)
 869 {
 870     wxString str;
 871     str.Printf("%.2f", f);
 872     WriteText(str);
 873     return *this;
 874 }
 875
 876 wxTextCtrl& wxTextCtrl::operator<<(double d)
 877 {
 878     wxString str;
 879     str.Printf("%.2f", d);
 880     WriteText(str);
 881     return *this;
 882 }
 883
 884 wxTextCtrl& wxTextCtrl::operator<<(int i)
 885 {
 886     wxString str;
 887     str.Printf("%d", i);
 888     WriteText(str);
 889     return *this;
 890 }
 891
 892 wxTextCtrl& wxTextCtrl::operator<<(long i)
 893 {
 894     wxString str;
 895     str.Printf("%ld", i);
 896     WriteText(str);
 897     return *this;
 898 }
 899
 900 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 901 {
 902     char buf[2];
 903
 904     buf[0] = c;
 905     buf[1] = 0;
 906     WriteText(buf);
 907     return *this;
 908 }
 909
 910 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 911       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 912 {
 913 #if CTL3D
 914   if ( m_useCtl3D )
 915   {
 916     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 917     return (WXHBRUSH) hbrush;
 918   }
 919 #endif
 920
 921   if (GetParent()->GetTransparentBackground())
 922     SetBkMode((HDC) pDC, TRANSPARENT);
 923   else
 924     SetBkMode((HDC) pDC, OPAQUE);
 925
 926   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 927   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 928
 929   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 930
 931   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 932   // has a zero usage count.
 933   // NOT NOW - will be cleaned up at end of app.
 934 //  backgroundBrush->RealizeResource();
 935   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 936 }
 937
 938 void wxTextCtrl::OnChar(wxKeyEvent& event)
 939 {
 940     // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 941   switch(event.KeyCode())
 942   {
 943   case '{':
 944   case '}':
 945   case '[':
 946   case ']':
 947   case '|':
 948   case '~':
 949   case '\\':
 950    {
 951     char c=(char)event.KeyCode();
 952     *this << c;
 953    }
 954    break;
 955   }
 956   if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 957   {
 958     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 959     event.SetEventObject( this );
 960     if ( GetEventHandler()->ProcessEvent(event) )
 961       return;
 962   }
 963   else if ( event.KeyCode() == WXK_TAB ) {
 964     wxNavigationKeyEvent event;
 965     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 966     event.SetWindowChange(FALSE);
 967     event.SetEventObject(this);
 968
 969     if ( GetEventHandler()->ProcessEvent(event) )
 970       return;
 971   }
 972
 973   event.Skip();
 974 }
 975
 976 long wxTextCtrl::MSWGetDlgCode()
 977 {
 978   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 979   if ( m_windowStyle & wxPROCESS_ENTER )
 980     lRc |= DLGC_WANTMESSAGE;
 981   else if ( m_windowStyle & wxTE_MULTILINE )
 982     lRc |= DLGC_WANTMESSAGE;
 983
 984   return lRc;
 985 }
 986
 987 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 988 {
 989     if ( m_windowStyle & wxTE_MULTILINE )
 990     {
 991         // No flicker - only problem is we probably can't change the background
 992         Default();
 993 /*
 994         RECT rect;
 995         ::GetClientRect((HWND) GetHWND(), &rect);
 996
 997         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 998         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 999
1000         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1001         ::DeleteObject(hBrush);
1002         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1003 */
1004     }
1005 //        wxWindow::OnEraseBackground(event);
1006 }
1007
1008 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1009 {
1010 /*
1011   // Debugging
1012   wxDebugMsg("Edit control %d: ", (int)id);
1013   switch (param)
1014   {
1015     case EN_SETFOCUS:
1016       wxDebugMsg("EN_SETFOCUS\n");
1017       break;
1018     case EN_KILLFOCUS:
1019       wxDebugMsg("EN_KILLFOCUS\n");
1020       break;
1021     case EN_CHANGE:
1022       wxDebugMsg("EN_CHANGE\n");
1023       break;
1024     case EN_UPDATE:
1025       wxDebugMsg("EN_UPDATE\n");
1026       break;
1027     case EN_ERRSPACE:
1028       wxDebugMsg("EN_ERRSPACE\n");
1029       break;
1030     case EN_MAXTEXT:
1031       wxDebugMsg("EN_MAXTEXT\n");
1032       break;
1033     case EN_HSCROLL:
1034       wxDebugMsg("EN_HSCROLL\n");
1035       break;
1036     case EN_VSCROLL:
1037       wxDebugMsg("EN_VSCROLL\n");
1038       break;
1039     default:
1040       wxDebugMsg("Unknown EDIT notification\n");
1041       break;
1042   }
1043 */
1044   switch (param)
1045   {
1046     case EN_SETFOCUS:
1047     case EN_KILLFOCUS:
1048       {
1049         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1050                                                  : wxEVT_SET_FOCUS,
1051                            m_windowId);
1052         event.SetEventObject( this );
1053         GetEventHandler()->ProcessEvent(event);
1054       }
1055       break;
1056
1057     case EN_CHANGE:
1058       {
1059         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1060         wxString val(GetValue());
1061         if ( !val.IsNull() )
1062           event.m_commandString = WXSTRINGCAST val;
1063         event.SetEventObject( this );
1064         ProcessCommand(event);
1065       }
1066       break;
1067
1068     // the other notification messages are not processed
1069     case EN_UPDATE:
1070     case EN_ERRSPACE:
1071     case EN_MAXTEXT:
1072     case EN_HSCROLL:
1073     case EN_VSCROLL:
1074     default:
1075       return FALSE;
1076   }
1077
1078   // processed
1079   return TRUE;
1080 }
1081
1082
1083 // For Rich Edit controls. Do we need it?
1084 #if 0
1085 #if defined(__WIN95__)
1086 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1087 {
1088   wxCommandEvent event(0, m_windowId);
1089   int eventType = 0;
1090   NMHDR *hdr1 = (NMHDR *) lParam;
1091   switch ( hdr1->code )
1092   {
1093     // Insert case code here
1094     default :
1095       return wxControl::MSWNotify(wParam, lParam);
1096       break;
1097   }
1098
1099   event.SetEventObject( this );
1100   event.SetEventType(eventType);
1101
1102   if ( !GetEventHandler()->ProcessEvent(event) )
1103     return FALSE;
1104
1105     return TRUE;
1106 }
1107 #endif
1108 #endif
1109