src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "textctrl.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/textctrl.h"
  25 #include "wx/settings.h"
  26 #include "wx/brush.h"
  27 #include "wx/utils.h"
  28 #include "wx/log.h"
  29 #endif
  30
  31 #if wxUSE_CLIPBOARD
  32 #include "wx/app.h"
  33 #include "wx/clipbrd.h"
  34 #endif
  35
  36 #include "wx/msw/private.h"
  37
  38 #include <windows.h>
  39 #include <stdlib.h>
  40
  41 #if wxUSE_IOSTREAMH
  42 #   include <fstream.h>
  43 #else
  44 #   include <fstream>
  45 #endif
  46
  47 #include <sys/types.h>
  48 #ifndef __MWERKS__
  49 #include <sys/stat.h>
  50 #else
  51 #include <stat.h>
  52 #endif
  53 #if defined(__BORLANDC__) && !defined(__WIN32__)
  54 #include <alloc.h>
  55 #else
  56 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
  57 #include <malloc.h>
  58 #endif
  59 #define farmalloc malloc
  60 #define farfree free
  61 #endif
  62 #include <windowsx.h>
  63
  64 #include <string.h>
  65
  66 #if wxUSE_RICHEDIT && !defined(__GNUWIN32__)
  67     #include <richedit.h>
  68 #endif
  69
  70 #if !USE_SHARED_LIBRARY
  71
  72 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  73
  74 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  75   EVT_CHAR(wxTextCtrl::OnChar)
  76   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  77
  78   EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  79   EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  80   EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  81   EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  82   EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  83
  84   EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  85   EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  86   EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  87   EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  88   EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  89 END_EVENT_TABLE()
  90
  91 #endif // USE_SHARED_LIBRARY
  92
  93 // Text item
  94 wxTextCtrl::wxTextCtrl()
  95 #ifndef NO_TEXT_WINDOW_STREAM
  96           : streambuf()
  97 #endif
  98 {
  99 #if wxUSE_RICHEDIT
 100   m_isRich = FALSE;
 101 #endif
 102 }
 103
 104 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 105                         const wxString& value,
 106                         const wxPoint& pos,
 107                         const wxSize& size, long style,
 108                         const wxValidator& validator,
 109                         const wxString& name)
 110 {
 111   SetName(name);
 112   SetValidator(validator);
 113   if (parent) parent->AddChild(this);
 114
 115   m_windowStyle = style;
 116
 117   // Should this be taken from the system colours?
 118 //  SetBackgroundColour(wxColour(255, 255, 255));
 119
 120   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 121
 122   SetForegroundColour(parent->GetForegroundColour()) ;
 123
 124   if ( id == -1 )
 125     m_windowId = (int)NewControlId();
 126   else
 127   m_windowId = id;
 128
 129   int x = pos.x;
 130   int y = pos.y;
 131   int width = size.x;
 132   int height = size.y;
 133
 134   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 135   if (m_windowStyle & wxTE_MULTILINE)
 136   {
 137     wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 138                   _T("wxTE_PROCESS_ENTER style is ignored for multiline controls") );
 139
 140     msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 141     m_windowStyle |= wxTE_PROCESS_ENTER;
 142   }
 143   else
 144     msStyle |= ES_AUTOHSCROLL ;
 145
 146   if (m_windowStyle & wxTE_READONLY)
 147     msStyle |= ES_READONLY;
 148
 149   if (m_windowStyle & wxHSCROLL)
 150     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 151   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 152     msStyle |= ES_PASSWORD;
 153
 154     // we always want the characters and the arrows
 155     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 156
 157     // we may have several different cases:
 158     // 1. normal case: both TAB and ENTER are used for dialog navigation
 159     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 160     //    control in the dialog
 161     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 162     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 163     //    the next control
 164     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 165         m_lDlgCode |= DLGC_WANTMESSAGE;
 166     if ( m_windowStyle & wxTE_PROCESS_TAB )
 167         m_lDlgCode |= DLGC_WANTTAB;
 168
 169   const wxChar *windowClass = _T("EDIT");
 170
 171 #if wxUSE_RICHEDIT
 172   if ( m_windowStyle & wxTE_MULTILINE )
 173   {
 174     msStyle |= ES_AUTOVSCROLL;
 175     m_isRich = TRUE;
 176     windowClass = _T("RichEdit") ;
 177   }
 178   else
 179     m_isRich = FALSE;
 180 #endif
 181
 182   bool want3D;
 183   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 184
 185   // If we're in Win95, and we want a simple 2D border,
 186   // then make it an EDIT control instead.
 187 #if wxUSE_RICHEDIT
 188   if (m_windowStyle & wxSIMPLE_BORDER)
 189   {
 190     windowClass = _T("EDIT");
 191     m_isRich = FALSE;
 192   }
 193 #endif
 194
 195   // Even with extended styles, need to combine with WS_BORDER
 196   // for them to look right.
 197   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 198     msStyle |= WS_BORDER;
 199
 200   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 201                         msStyle,
 202                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 203                         wxGetInstance(), NULL);
 204
 205   wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create text ctrl") );
 206
 207 #if wxUSE_CTL3D
 208   if ( want3D )
 209   {
 210     Ctl3dSubclassCtl((HWND)m_hWnd);
 211     m_useCtl3D = TRUE;
 212   }
 213 #endif
 214
 215 #if wxUSE_RICHEDIT
 216   if (m_isRich)
 217   {
 218     // Have to enable events
 219     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 220                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 221   }
 222 #endif
 223
 224   SubclassWin(GetHWND());
 225
 226   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 227   {
 228     SetFont(parent->GetFont());
 229   }
 230   else
 231   {
 232     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 233   }
 234
 235   SetSize(x, y, width, height);
 236
 237   // Causes a crash for Symantec C++ and WIN32 for some reason
 238 #if !(defined(__SC__) && defined(__WIN32__))
 239   if ( !value.IsEmpty() )
 240   {
 241     SetValue(value);
 242   }
 243 #endif
 244
 245   return TRUE;
 246 }
 247
 248 // Make sure the window style (etc.) reflects the HWND style (roughly)
 249 void wxTextCtrl::AdoptAttributesFromHWND()
 250 {
 251   wxWindow::AdoptAttributesFromHWND();
 252
 253   HWND hWnd = GetHwnd();
 254   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 255
 256   // retrieve the style to see whether this is an edit or richedit ctrl
 257 #if wxUSE_RICHEDIT
 258   wxChar buf[256];
 259
 260 #ifndef __WIN32__
 261   GetClassName((HWND) hWnd, buf, 256);
 262 #else
 263 #ifdef UNICODE
 264   GetClassNameW((HWND) hWnd, buf, 256);
 265 #else
 266 #ifdef __TWIN32__
 267   GetClassName((HWND) hWnd, buf, 256);
 268 #else
 269   GetClassNameA((HWND) hWnd, buf, 256);
 270 #endif
 271 #endif
 272 #endif
 273
 274   wxString str(buf);
 275   str.UpperCase();
 276
 277   if (str == _T("EDIT"))
 278     m_isRich = FALSE;
 279   else
 280     m_isRich = TRUE;
 281 #endif
 282
 283   if (style & ES_MULTILINE)
 284     m_windowStyle |= wxTE_MULTILINE;
 285   if (style & ES_PASSWORD)
 286     m_windowStyle |= wxTE_PASSWORD;
 287   if (style & ES_READONLY)
 288     m_windowStyle |= wxTE_READONLY;
 289   if (style & ES_WANTRETURN)
 290     m_windowStyle |= wxTE_PROCESS_ENTER;
 291 }
 292
 293 void wxTextCtrl::SetupColours()
 294 {
 295   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 296   SetForegroundColour(GetParent()->GetForegroundColour());
 297 }
 298
 299 wxString wxTextCtrl::GetValue() const
 300 {
 301     return wxGetWindowText(GetHWND());
 302 }
 303
 304 void wxTextCtrl::SetValue(const wxString& value)
 305 {
 306   // If newlines are denoted by just 10, must stick 13 in front.
 307   int singletons = 0;
 308   int len = value.Length();
 309   int i;
 310   for (i = 0; i < len; i ++)
 311   {
 312     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 313       singletons ++;
 314   }
 315   if (singletons > 0)
 316   {
 317     wxChar *tmp = new wxChar[len + singletons + 1];
 318     int j = 0;
 319     for (i = 0; i < len; i ++)
 320     {
 321       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 322       {
 323         tmp[j] = 13;
 324         j ++;
 325       }
 326       tmp[j] = value[i];
 327       j ++;
 328     }
 329     tmp[j] = 0;
 330     SetWindowText(GetHwnd(), tmp);
 331     delete[] tmp;
 332   }
 333   else
 334     SetWindowText(GetHwnd(), (const wxChar *)value);
 335
 336   AdjustSpaceLimit();
 337 }
 338
 339 wxSize wxTextCtrl::DoGetBestSize()
 340 {
 341     int cx, cy;
 342     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 343
 344     int wText = DEFAULT_ITEM_WIDTH;
 345     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 346
 347     return wxSize(wText, hText);
 348 }
 349
 350 // Clipboard operations
 351 void wxTextCtrl::Copy()
 352 {
 353     if (CanCopy())
 354     {
 355         HWND hWnd = GetHwnd();
 356         SendMessage(hWnd, WM_COPY, 0, 0L);
 357     }
 358 }
 359
 360 void wxTextCtrl::Cut()
 361 {
 362     if (CanCut())
 363     {
 364         HWND hWnd = GetHwnd();
 365         SendMessage(hWnd, WM_CUT, 0, 0L);
 366     }
 367 }
 368
 369 void wxTextCtrl::Paste()
 370 {
 371     if (CanPaste())
 372     {
 373         HWND hWnd = GetHwnd();
 374         SendMessage(hWnd, WM_PASTE, 0, 0L);
 375     }
 376 }
 377
 378 void wxTextCtrl::SetEditable(bool editable)
 379 {
 380   HWND hWnd = GetHwnd();
 381   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 382 }
 383
 384 void wxTextCtrl::SetInsertionPoint(long pos)
 385 {
 386   HWND hWnd = GetHwnd();
 387 #ifdef __WIN32__
 388 #if wxUSE_RICHEDIT
 389   if ( m_isRich)
 390   {
 391     CHARRANGE range;
 392     range.cpMin = pos;
 393     range.cpMax = pos;
 394     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 395     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 396   }
 397   else
 398 #endif
 399   {
 400     SendMessage(hWnd, EM_SETSEL, pos, pos);
 401     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 402   }
 403 #else
 404   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 405 #endif
 406   char *nothing = "";
 407   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 408 }
 409
 410 void wxTextCtrl::SetInsertionPointEnd()
 411 {
 412   long pos = GetLastPosition();
 413   SetInsertionPoint(pos);
 414 }
 415
 416 long wxTextCtrl::GetInsertionPoint() const
 417 {
 418 #if wxUSE_RICHEDIT
 419   if (m_isRich)
 420   {
 421     CHARRANGE range;
 422     range.cpMin = 0;
 423     range.cpMax = 0;
 424     SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 425     return range.cpMin;
 426   }
 427 #endif
 428
 429   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 430   return Pos&0xFFFF;
 431 }
 432
 433 long wxTextCtrl::GetLastPosition() const
 434 {
 435     HWND hWnd = GetHwnd();
 436
 437     // Will always return a number > 0 (according to docs)
 438     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 439
 440     // This gets the char index for the _beginning_ of the last line
 441     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 442
 443     // Get number of characters in the last line. We'll add this to the character
 444     // index for the last line, 1st position.
 445     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 446
 447     return (long)(charIndex + lineLength);
 448 }
 449
 450 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 451 {
 452 #if wxUSE_CLIPBOARD
 453     HWND hWnd = GetHwnd();
 454     long fromChar = from;
 455     long toChar = to;
 456
 457     // Set selection and remove it
 458 #ifdef __WIN32__
 459     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 460 #else
 461     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 462 #endif
 463     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 464
 465     // Now replace with 'value', by pasting.
 466     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 467
 468     // Paste into edit control
 469     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 470 #else
 471     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 472 #endif
 473 }
 474
 475 void wxTextCtrl::Remove(long from, long to)
 476 {
 477     HWND hWnd = GetHwnd();
 478     long fromChar = from;
 479     long toChar = to;
 480
 481     // Cut all selected text
 482 #ifdef __WIN32__
 483     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 484 #else
 485     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 486 #endif
 487     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 488 }
 489
 490 void wxTextCtrl::SetSelection(long from, long to)
 491 {
 492     HWND hWnd = GetHwnd();
 493     long fromChar = from;
 494     long toChar = to;
 495     // if from and to are both -1, it means
 496     // (in wxWindows) that all text should be selected.
 497     // This translates into Windows convention
 498     if ((from == -1) && (to == -1))
 499     {
 500       fromChar = 0;
 501       toChar = -1;
 502     }
 503
 504 #ifdef __WIN32__
 505     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 506     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 507 #else
 508     // WPARAM is 0: selection is scrolled into view
 509     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 510 #endif
 511 }
 512
 513 bool wxTextCtrl::LoadFile(const wxString& file)
 514 {
 515   if (!wxFileExists(WXSTRINGCAST file))
 516     return FALSE;
 517
 518   m_fileName = file;
 519
 520   Clear();
 521
 522 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 523   ifstream input(MBSTRINGCAST file.mb_str(wxConvFile), ios::in);
 524
 525   if (!input.bad())
 526   {
 527       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 528       // line by line into the control. Apart from being very slow this
 529       // was limited to 32K of text by the external interface presenting
 530       // positions as signed shorts. Now load in one chunk...
 531       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 532
 533 #ifdef __SALFORDC__
 534       struct _stat stat_buf;
 535       if (stat(MBSTRINGCAST file.mb_str(wxConvFile), &stat_buf) < 0)
 536         return FALSE;
 537 #else
 538       struct stat stat_buf;
 539       if (stat(file.mb_str(wxConvFile), &stat_buf) < 0)
 540         return FALSE;
 541 #endif
 542
 543 //      wxChar *tmp_buffer = (wxChar*)farmalloc(stat_buf.st_size+1);
 544       // This may need to be a bigger buffer than the file size suggests,
 545       // if it's a UNIX file. Give it an extra 1000 just in case.
 546       wxChar *tmp_buffer = (wxChar*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 547       char *read_buffer = new char[512];
 548       long no_lines = 0;
 549       long pos = 0;
 550       while (!input.eof() && input.peek() != EOF)
 551       {
 552         input.getline(read_buffer, 500);
 553   int len = strlen(read_buffer);
 554   wxBuffer[len] = 13;
 555   wxBuffer[len+1] = 10;
 556   wxBuffer[len+2] = 0;
 557 #if wxUSE_UNICODE
 558   pos += wxConvCurrent->MB2WC(tmp_buffer+pos, read_buffer, (size_t)-1);
 559 #else
 560   strcpy(tmp_buffer+pos, read_buffer);
 561   pos += strlen(read_buffer);
 562 #endif
 563   no_lines++;
 564       }
 565       delete[] read_buffer;
 566
 567       SetWindowText(GetHwnd(), tmp_buffer);
 568       SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 569       farfree(tmp_buffer);
 570
 571       // update the size limit if needed
 572       AdjustSpaceLimit();
 573
 574       return TRUE;
 575   }
 576   return FALSE;
 577 }
 578
 579 // If file is null, try saved file name first
 580 // Returns TRUE if succeeds.
 581 bool wxTextCtrl::SaveFile(const wxString& file)
 582 {
 583     wxString theFile(file);
 584
 585     if (theFile == _T(""))
 586         theFile = m_fileName;
 587
 588     if (theFile == _T(""))
 589         return FALSE;
 590
 591     m_fileName = theFile;
 592
 593     ofstream output(MBSTRINGCAST theFile.mb_str(wxConvFile));
 594     if (output.bad())
 595         return FALSE;
 596
 597     // This will only save 64K max
 598     unsigned long nbytes = SendMessage(GetHwnd(), WM_GETTEXTLENGTH, 0, 0);
 599     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 600     SendMessage(GetHwnd(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 601     char *pstr = tmp_buffer;
 602
 603     // Convert \r\n to just \n
 604     while (*pstr)
 605     {
 606       if (*pstr != '\r')
 607         output << *pstr;
 608       pstr++;
 609     }
 610
 611     farfree(tmp_buffer);
 612     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 613
 614     return TRUE;
 615 }
 616
 617 void wxTextCtrl::WriteText(const wxString& text)
 618 {
 619     // Covert \n to \r\n
 620     int len = text.Length();
 621     char *newtext = new char[(len*2)+1];
 622     int i = 0;
 623     int j = 0;
 624     while (i < len)
 625     {
 626       if (text[i] == '\n')
 627       {
 628         newtext[j] = '\r';
 629         j ++;
 630       }
 631       newtext[j] = text[i];
 632       i ++;
 633       j ++;
 634     }
 635     newtext[j] = 0;
 636     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)newtext);
 637     delete[] newtext;
 638
 639     AdjustSpaceLimit();
 640 }
 641
 642 void wxTextCtrl::AppendText(const wxString& text)
 643 {
 644     SetInsertionPointEnd();
 645     WriteText(text);
 646 }
 647
 648 void wxTextCtrl::Clear()
 649 {
 650     SetWindowText(GetHwnd(), _T(""));
 651 }
 652
 653 bool wxTextCtrl::IsModified() const
 654 {
 655     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 656 }
 657
 658 // Makes 'unmodified'
 659 void wxTextCtrl::DiscardEdits()
 660 {
 661   SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 662 }
 663
 664 /*
 665  * Some of the following functions are yet to be implemented
 666  *
 667  */
 668
 669 int wxTextCtrl::GetNumberOfLines() const
 670 {
 671     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 672 }
 673
 674 long wxTextCtrl::XYToPosition(long x, long y) const
 675 {
 676     HWND hWnd = GetHwnd();
 677
 678     // This gets the char index for the _beginning_ of this line
 679     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 680     return (long)(x + charIndex);
 681 }
 682
 683 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 684 {
 685     HWND hWnd = GetHwnd();
 686
 687     // This gets the line number containing the character
 688     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 689     // This gets the char index for the _beginning_ of this line
 690     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 691     // The X position must therefore be the different between pos and charIndex
 692     *x = (long)(pos - charIndex);
 693     *y = (long)lineNo;
 694 }
 695
 696 void wxTextCtrl::ShowPosition(long pos)
 697 {
 698     HWND hWnd = GetHwnd();
 699
 700     // To scroll to a position, we pass the number of lines and characters
 701     // to scroll *by*. This means that we need to:
 702     // (1) Find the line position of the current line.
 703     // (2) Find the line position of pos.
 704     // (3) Scroll by (pos - current).
 705     // For now, ignore the horizontal scrolling.
 706
 707     // Is this where scrolling is relative to - the line containing the caret?
 708     // Or is the first visible line??? Try first visible line.
 709 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 710
 711     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 712
 713     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 714
 715     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 716
 717     if (linesToScroll != 0)
 718       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 719 }
 720
 721 int wxTextCtrl::GetLineLength(long lineNo) const
 722 {
 723     long charIndex = XYToPosition(0, lineNo);
 724     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 725     return len;
 726 }
 727
 728 wxString wxTextCtrl::GetLineText(long lineNo) const
 729 {
 730     size_t len = (size_t)GetLineLength(lineNo);
 731     char *buf = (char *)malloc(len);
 732     *(WORD *)buf = len;
 733     int noChars = (int)SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 734     buf[noChars] = 0;
 735
 736     wxString str(buf);
 737
 738     free(buf);
 739
 740     return str;
 741 }
 742
 743 bool wxTextCtrl::CanCopy() const
 744 {
 745     // Can copy if there's a selection
 746     long from, to;
 747     GetSelection(& from, & to);
 748     return (from != to) ;
 749 }
 750
 751 bool wxTextCtrl::CanCut() const
 752 {
 753     // Can cut if there's a selection
 754     long from, to;
 755     GetSelection(& from, & to);
 756     return (from != to) ;
 757 }
 758
 759 bool wxTextCtrl::CanPaste() const
 760 {
 761 #if wxUSE_RICHEDIT
 762     if (m_isRich)
 763     {
 764         int dataFormat = 0; // 0 == any format
 765         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 766     }
 767 #endif
 768     if (!IsEditable())
 769         return FALSE;
 770
 771     // Standard edit control: check for straight text on clipboard
 772     bool isTextAvailable = FALSE;
 773     if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
 774     {
 775         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 776         ::CloseClipboard();
 777     }
 778     return isTextAvailable;
 779 }
 780
 781 // Undo/redo
 782 void wxTextCtrl::Undo()
 783 {
 784     if (CanUndo())
 785     {
 786         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 787     }
 788 }
 789
 790 void wxTextCtrl::Redo()
 791 {
 792     if (CanRedo())
 793     {
 794         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 795         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 796     }
 797 }
 798
 799 bool wxTextCtrl::CanUndo() const
 800 {
 801     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 802 }
 803
 804 bool wxTextCtrl::CanRedo() const
 805 {
 806     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 807 }
 808
 809 // If the return values from and to are the same, there is no
 810 // selection.
 811 void wxTextCtrl::GetSelection(long* from, long* to) const
 812 {
 813 #if wxUSE_RICHEDIT
 814     if (m_isRich)
 815     {
 816         CHARRANGE charRange;
 817         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 818
 819         *from = charRange.cpMin;
 820         *to = charRange.cpMax;
 821
 822         return;
 823     }
 824 #endif
 825     DWORD dwStart, dwEnd;
 826     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 827     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 828
 829     ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 830
 831     *from = dwStart;
 832     *to = dwEnd;
 833 }
 834
 835 bool wxTextCtrl::IsEditable() const
 836 {
 837     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 838
 839     return ((style & ES_READONLY) == 0);
 840 }
 841
 842 void wxTextCtrl::Command(wxCommandEvent & event)
 843 {
 844   SetValue (event.GetString());
 845   ProcessCommand (event);
 846 }
 847
 848 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 849 {
 850   // By default, load the first file into the text window.
 851   if (event.GetNumberOfFiles() > 0)
 852   {
 853     LoadFile(event.GetFiles()[0]);
 854   }
 855 }
 856
 857 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 858 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 859
 860 //=========================================================================
 861 // Called then the buffer is full (gcc 2.6.3)
 862 // or when "endl" is output (Borland 4.5)
 863 //=========================================================================
 864 // Class declaration using multiple inheritance doesn't work properly for
 865 // Borland. See note in textctrl.h.
 866 #ifndef NO_TEXT_WINDOW_STREAM
 867 int wxTextCtrl::overflow(int c)
 868 {
 869   // Make sure there is a holding area
 870   // this is not needed in <iostream> usage as it automagically allocates
 871   // it, but does someone want to emulate it for safety's sake?
 872 #if wxUSE_IOSTREAMH
 873   if ( allocate()==EOF )
 874   {
 875     wxLogError("Streambuf allocation failed");
 876     return EOF;
 877   }
 878 #endif
 879
 880   // Verify that there are no characters in get area
 881   if ( gptr() && gptr() < egptr() )
 882   {
 883      wxError("Who's trespassing my get area?","Internal error");
 884      return EOF;
 885   }
 886
 887   // Reset get area
 888   setg(0,0,0);
 889
 890   // Make sure there is a put area
 891   if ( ! pptr() )
 892   {
 893 /* This doesn't seem to be fatal so comment out error message */
 894 //    wxError("Put area not opened","Internal error");
 895
 896 #if wxUSE_IOSTREAMH
 897           setp( base(), base() );
 898 #else
 899           setp( pbase(), pbase() );
 900 #endif
 901   }
 902
 903   // Determine how many characters have been inserted but no consumed
 904   int plen = pptr() - pbase();
 905
 906   // Now Jerry relies on the fact that the buffer is at least 2 chars
 907   // long, but the holding area "may be as small as 1" ???
 908   // And we need an additional \0, so let's keep this inefficient but
 909   // safe copy.
 910
 911   // If c!=EOF, it is a character that must also be comsumed
 912   int xtra = c==EOF? 0 : 1;
 913
 914   // Write temporary C-string to wxTextWindow
 915   {
 916   char *txt = new char[plen+xtra+1];
 917   memcpy(txt, pbase(), plen);
 918   txt[plen] = (char)c;     // append c
 919   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 920     // If the put area already contained \0, output will be truncated there
 921   AppendText(txt);
 922     delete[] txt;
 923   }
 924
 925   // Reset put area
 926   setp(pbase(), epptr());
 927
 928 #if defined(__WATCOMC__)
 929   return __NOT_EOF;
 930 #elif defined(zapeof)     // HP-UX (all cfront based?)
 931   return zapeof(c);
 932 #else
 933   return c!=EOF ? c : 0;  // this should make everybody happy
 934 #endif
 935
 936 /* OLD CODE
 937   int len = pptr() - pbase();
 938   char *txt = new char[len+1];
 939   strncpy(txt, pbase(), len);
 940   txt[len] = '\0';
 941   (*this) << txt;
 942   setp(pbase(), epptr());
 943   delete[] txt;
 944   return EOF;
 945 */
 946 }
 947
 948 //=========================================================================
 949 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 950 //=========================================================================
 951 int wxTextCtrl::sync()
 952 {
 953   // Verify that there are no characters in get area
 954   if ( gptr() && gptr() < egptr() )
 955   {
 956      wxError("Who's trespassing my get area?","Internal error");
 957      return EOF;
 958   }
 959
 960   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 961
 962   return 0;
 963 /* OLD CODE
 964   int len = pptr() - pbase();
 965   char *txt = new char[len+1];
 966   strncpy(txt, pbase(), len);
 967   txt[len] = '\0';
 968   (*this) << txt;
 969   setp(pbase(), epptr());
 970   delete[] txt;
 971   return 0;
 972 */
 973 }
 974
 975 //=========================================================================
 976 // Should not be called by a "ostream". Used by a "istream"
 977 //=========================================================================
 978 int wxTextCtrl::underflow()
 979 {
 980   return EOF;
 981 }
 982 #endif
 983
 984 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 985 {
 986     AppendText(s);
 987     return *this;
 988 }
 989
 990 wxTextCtrl& wxTextCtrl::operator<<(float f)
 991 {
 992     wxString str;
 993     str.Printf(_T("%.2f"), f);
 994     AppendText(str);
 995     return *this;
 996 }
 997
 998 wxTextCtrl& wxTextCtrl::operator<<(double d)
 999 {
1000     wxString str;
1001     str.Printf(_T("%.2f"), d);
1002     AppendText(str);
1003     return *this;
1004 }
1005
1006 wxTextCtrl& wxTextCtrl::operator<<(int i)
1007 {
1008     wxString str;
1009     str.Printf(_T("%d"), i);
1010     AppendText(str);
1011     return *this;
1012 }
1013
1014 wxTextCtrl& wxTextCtrl::operator<<(long i)
1015 {
1016     wxString str;
1017     str.Printf(_T("%ld"), i);
1018     AppendText(str);
1019     return *this;
1020 }
1021
1022 wxTextCtrl& wxTextCtrl::operator<<(const char c)
1023 {
1024     char buf[2];
1025
1026     buf[0] = c;
1027     buf[1] = 0;
1028     AppendText(buf);
1029     return *this;
1030 }
1031
1032 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1033       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1034 {
1035 #if wxUSE_CTL3D
1036   if ( m_useCtl3D )
1037   {
1038     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1039     return (WXHBRUSH) hbrush;
1040   }
1041 #endif
1042
1043   if (GetParent()->GetTransparentBackground())
1044     SetBkMode((HDC) pDC, TRANSPARENT);
1045   else
1046     SetBkMode((HDC) pDC, OPAQUE);
1047
1048   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1049   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1050
1051   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1052
1053   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1054   // has a zero usage count.
1055   // NOT NOW - will be cleaned up at end of app.
1056 //  backgroundBrush->RealizeResource();
1057   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1058 }
1059
1060 void wxTextCtrl::OnChar(wxKeyEvent& event)
1061 {
1062     switch ( event.KeyCode() )
1063     {
1064         case WXK_RETURN:
1065             if ( !(m_windowStyle & wxTE_MULTILINE) )
1066             {
1067                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1068                 event.SetEventObject( this );
1069                 if ( GetEventHandler()->ProcessEvent(event) )
1070                     return;
1071             }
1072             //else: multiline controls need Enter for themselves
1073
1074             break;
1075
1076         case WXK_TAB:
1077             // always produce navigation event - even if we process TAB
1078             // ourselves the fact that we got here means that the user code
1079             // decided to skip processing of this TAB - probably to let it
1080             // do its default job.
1081             //
1082             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1083             //     handled by Windows
1084             {
1085                 wxNavigationKeyEvent eventNav;
1086                 eventNav.SetDirection(!event.ShiftDown());
1087                 eventNav.SetWindowChange(FALSE);
1088                 eventNav.SetEventObject(this);
1089
1090                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1091                     return;
1092             }
1093             break;
1094
1095         default:
1096             event.Skip();
1097             return;
1098     }
1099
1100     // don't just call event.Skip() because this will cause TABs and ENTERs
1101     // be passed upwards and we don't always want this - instead process it
1102     // right here
1103
1104     // FIXME
1105     event.Skip();
1106 }
1107
1108 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1109 {
1110     switch (param)
1111     {
1112         case EN_SETFOCUS:
1113         case EN_KILLFOCUS:
1114             {
1115                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1116                         : wxEVT_SET_FOCUS,
1117                         m_windowId);
1118                 event.SetEventObject( this );
1119                 GetEventHandler()->ProcessEvent(event);
1120             }
1121             break;
1122
1123         case EN_CHANGE:
1124             {
1125                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1126                 wxString val(GetValue());
1127                 if ( !val.IsNull() )
1128                     event.m_commandString = WXSTRINGCAST val;
1129                 event.SetEventObject( this );
1130                 ProcessCommand(event);
1131             }
1132             break;
1133
1134         case EN_ERRSPACE:
1135             // the text size limit has been hit - increase it
1136             AdjustSpaceLimit();
1137             break;
1138
1139             // the other notification messages are not processed
1140         case EN_UPDATE:
1141         case EN_MAXTEXT:
1142         case EN_HSCROLL:
1143         case EN_VSCROLL:
1144         default:
1145             return FALSE;
1146     }
1147
1148     // processed
1149     return TRUE;
1150 }
1151
1152 void wxTextCtrl::AdjustSpaceLimit()
1153 {
1154 #ifndef __WIN16__
1155     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1156     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1157     if ( len > limit )
1158     {
1159         limit = len + 0x8000;    // 32Kb
1160
1161 #if wxUSE_RICHEDIT
1162         if ( m_isRich || limit > 0xffff )
1163 #else
1164         if ( limit > 0xffff )
1165 #endif
1166             ::SendMessage(GetHwnd(), EM_LIMITTEXT, 0, limit);
1167         else
1168             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1169     }
1170 #endif
1171 }
1172
1173 // For Rich Edit controls. Do we need it?
1174 #if 0
1175 #if wxUSE_RICHEDIT
1176 bool wxTextCtrl::MSWOnNotify(WXWPARAM wParam, WXLPARAM lParam)
1177 {
1178   wxCommandEvent event(0, m_windowId);
1179   int eventType = 0;
1180   NMHDR *hdr1 = (NMHDR *) lParam;
1181   switch ( hdr1->code )
1182   {
1183     // Insert case code here
1184     default :
1185       return wxControl::MSWOnNotify(wParam, lParam);
1186       break;
1187   }
1188
1189   event.SetEventObject( this );
1190   event.SetEventType(eventType);
1191
1192   if ( !GetEventHandler()->ProcessEvent(event) )
1193     return FALSE;
1194
1195     return TRUE;
1196 }
1197 #endif
1198 #endif
1199
1200 void wxTextCtrl::OnCut(wxCommandEvent& event)
1201 {
1202     Cut();
1203 }
1204
1205 void wxTextCtrl::OnCopy(wxCommandEvent& event)
1206 {
1207     Copy();
1208 }
1209
1210 void wxTextCtrl::OnPaste(wxCommandEvent& event)
1211 {
1212     Paste();
1213 }
1214
1215 void wxTextCtrl::OnUndo(wxCommandEvent& event)
1216 {
1217     Undo();
1218 }
1219
1220 void wxTextCtrl::OnRedo(wxCommandEvent& event)
1221 {
1222     Redo();
1223 }
1224
1225 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1226 {
1227     event.Enable( CanCut() );
1228 }
1229
1230 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1231 {
1232     event.Enable( CanCopy() );
1233 }
1234
1235 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1236 {
1237     event.Enable( CanPaste() );
1238 }
1239
1240 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1241 {
1242     event.Enable( CanUndo() );
1243 }
1244
1245 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1246 {
1247     event.Enable( CanRedo() );
1248 }
1249
1250 bool wxTextCtrl::AcceptsFocus() const
1251 {
1252     // we don't want focus if we can't be edited
1253     return IsEditable() && wxControl::AcceptsFocus();
1254 }