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                   "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   const char *windowClass = "EDIT";
 155
 156 #if wxUSE_RICHEDIT
 157   if ( m_windowStyle & wxTE_MULTILINE )
 158   {
 159     msStyle |= ES_AUTOVSCROLL;
 160     m_isRich = TRUE;
 161     windowClass = "RichEdit" ;
 162   }
 163   else
 164     m_isRich = FALSE;
 165 #endif
 166
 167   bool want3D;
 168   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 169
 170   // If we're in Win95, and we want a simple 2D border,
 171   // then make it an EDIT control instead.
 172 #if wxUSE_RICHEDIT
 173   if (m_windowStyle & wxSIMPLE_BORDER)
 174   {
 175     windowClass = "EDIT";
 176     m_isRich = FALSE;
 177   }
 178 #endif
 179
 180   // Even with extended styles, need to combine with WS_BORDER
 181   // for them to look right.
 182   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 183     msStyle |= WS_BORDER;
 184
 185   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 186                         msStyle,
 187                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 188                         wxGetInstance(), NULL);
 189
 190   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 191
 192 #if wxUSE_CTL3D
 193   if ( want3D )
 194   {
 195     Ctl3dSubclassCtl((HWND)m_hWnd);
 196     m_useCtl3D = TRUE;
 197   }
 198 #endif
 199
 200 #if wxUSE_RICHEDIT
 201   if (m_isRich)
 202   {
 203     // Have to enable events
 204     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 205                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 206   }
 207 #endif
 208
 209   SubclassWin(GetHWND());
 210
 211   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 212   {
 213     SetFont(parent->GetFont());
 214   }
 215   else
 216   {
 217     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 218   }
 219
 220   SetSize(x, y, width, height);
 221
 222   // Causes a crash for Symantec C++ and WIN32 for some reason
 223 #if !(defined(__SC__) && defined(__WIN32__))
 224   if ( !value.IsEmpty() )
 225   {
 226     SetValue(value);
 227   }
 228 #endif
 229
 230   return TRUE;
 231 }
 232
 233 // Make sure the window style (etc.) reflects the HWND style (roughly)
 234 void wxTextCtrl::AdoptAttributesFromHWND()
 235 {
 236   wxWindow::AdoptAttributesFromHWND();
 237
 238   HWND hWnd = GetHwnd();
 239   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 240
 241   // retrieve the style to see whether this is an edit or richedit ctrl
 242 #if wxUSE_RICHEDIT
 243   char buf[256];
 244
 245 #ifndef __WIN32__
 246   GetClassName((HWND) hWnd, buf, 256);
 247 #else
 248 #ifdef UNICODE
 249   GetClassNameW((HWND) hWnd, buf, 256);
 250 #else
 251 #ifdef __TWIN32__
 252   GetClassName((HWND) hWnd, buf, 256);
 253 #else
 254   GetClassNameA((HWND) hWnd, buf, 256);
 255 #endif
 256 #endif
 257 #endif
 258
 259   wxString str(buf);
 260   str.UpperCase();
 261
 262   if (str == "EDIT")
 263     m_isRich = FALSE;
 264   else
 265     m_isRich = TRUE;
 266 #endif
 267
 268   if (style & ES_MULTILINE)
 269     m_windowStyle |= wxTE_MULTILINE;
 270   if (style & ES_PASSWORD)
 271     m_windowStyle |= wxTE_PASSWORD;
 272   if (style & ES_READONLY)
 273     m_windowStyle |= wxTE_READONLY;
 274   if (style & ES_WANTRETURN)
 275     m_windowStyle |= wxTE_PROCESS_ENTER;
 276 }
 277
 278 void wxTextCtrl::SetupColours()
 279 {
 280   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 281   SetForegroundColour(GetParent()->GetForegroundColour());
 282 }
 283
 284 wxString wxTextCtrl::GetValue() const
 285 {
 286     return wxGetWindowText(GetHWND());
 287 }
 288
 289 void wxTextCtrl::SetValue(const wxString& value)
 290 {
 291   // If newlines are denoted by just 10, must stick 13 in front.
 292   int singletons = 0;
 293   int len = value.Length();
 294   int i;
 295   for (i = 0; i < len; i ++)
 296   {
 297     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 298       singletons ++;
 299   }
 300   if (singletons > 0)
 301   {
 302     char *tmp = new char[len + singletons + 1];
 303     int j = 0;
 304     for (i = 0; i < len; i ++)
 305     {
 306       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 307       {
 308         tmp[j] = 13;
 309         j ++;
 310       }
 311       tmp[j] = value[i];
 312       j ++;
 313     }
 314     tmp[j] = 0;
 315     SetWindowText(GetHwnd(), tmp);
 316     delete[] tmp;
 317   }
 318   else
 319     SetWindowText(GetHwnd(), (const char *)value);
 320
 321   AdjustSpaceLimit();
 322 }
 323
 324 void wxTextCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 325 {
 326   int currentX, currentY;
 327   GetPosition(&currentX, &currentY);
 328   int x1 = x;
 329   int y1 = y;
 330   int w1 = width;
 331   int h1 = height;
 332
 333   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 334     x1 = currentX;
 335   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 336     y1 = currentY;
 337
 338   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 339
 340   int cx; // button font dimensions
 341   int cy;
 342
 343   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 344
 345   int control_width, control_height, control_x, control_y;
 346
 347   // If we're prepared to use the existing size, then...
 348   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 349   {
 350     GetSize(&w1, &h1);
 351   }
 352
 353   // Deal with default size (using -1 values)
 354   if (w1<=0)
 355     w1 = DEFAULT_ITEM_WIDTH;
 356
 357   control_x = x1;
 358   control_y = y1;
 359   control_width = w1;
 360   control_height = h1;
 361
 362   // Calculations may have made text size too small
 363   if (control_height <= 0)
 364     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 365
 366   if (control_width <= 0)
 367     control_width = DEFAULT_ITEM_WIDTH;
 368
 369   MoveWindow(GetHwnd(), (int)control_x, (int)control_y,
 370                               (int)control_width, (int)control_height, TRUE);
 371 }
 372
 373 // Clipboard operations
 374 void wxTextCtrl::Copy()
 375 {
 376     if (CanCopy())
 377     {
 378         HWND hWnd = GetHwnd();
 379         SendMessage(hWnd, WM_COPY, 0, 0L);
 380     }
 381 }
 382
 383 void wxTextCtrl::Cut()
 384 {
 385     if (CanCut())
 386     {
 387         HWND hWnd = GetHwnd();
 388         SendMessage(hWnd, WM_CUT, 0, 0L);
 389     }
 390 }
 391
 392 void wxTextCtrl::Paste()
 393 {
 394     if (CanPaste())
 395     {
 396         HWND hWnd = GetHwnd();
 397         SendMessage(hWnd, WM_PASTE, 0, 0L);
 398     }
 399 }
 400
 401 void wxTextCtrl::SetEditable(bool editable)
 402 {
 403   HWND hWnd = GetHwnd();
 404   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 405 }
 406
 407 void wxTextCtrl::SetInsertionPoint(long pos)
 408 {
 409   HWND hWnd = GetHwnd();
 410 #ifdef __WIN32__
 411 #if wxUSE_RICHEDIT
 412   if ( m_isRich)
 413   {
 414     CHARRANGE range;
 415     range.cpMin = pos;
 416     range.cpMax = pos;
 417     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 418     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 419   }
 420   else
 421 #endif
 422   {
 423     SendMessage(hWnd, EM_SETSEL, pos, pos);
 424     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 425   }
 426 #else
 427   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 428 #endif
 429   char *nothing = "";
 430   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 431 }
 432
 433 void wxTextCtrl::SetInsertionPointEnd()
 434 {
 435   long pos = GetLastPosition();
 436   SetInsertionPoint(pos);
 437 }
 438
 439 long wxTextCtrl::GetInsertionPoint() const
 440 {
 441 #if wxUSE_RICHEDIT
 442   if (m_isRich)
 443   {
 444     CHARRANGE range;
 445     range.cpMin = 0;
 446     range.cpMax = 0;
 447     SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 448     return range.cpMin;
 449   }
 450 #endif
 451
 452   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 453   return Pos&0xFFFF;
 454 }
 455
 456 long wxTextCtrl::GetLastPosition() const
 457 {
 458     HWND hWnd = GetHwnd();
 459
 460     // Will always return a number > 0 (according to docs)
 461     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 462
 463     // This gets the char index for the _beginning_ of the last line
 464     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 465
 466     // Get number of characters in the last line. We'll add this to the character
 467     // index for the last line, 1st position.
 468     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 469
 470     return (long)(charIndex + lineLength);
 471 }
 472
 473 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 474 {
 475 #if wxUSE_CLIPBOARD
 476     HWND hWnd = GetHwnd();
 477     long fromChar = from;
 478     long toChar = to;
 479
 480     // Set selection and remove it
 481 #ifdef __WIN32__
 482     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 483 #else
 484     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 485 #endif
 486     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 487
 488     // Now replace with 'value', by pasting.
 489     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 490
 491     // Paste into edit control
 492     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 493 #else
 494     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 495 #endif
 496 }
 497
 498 void wxTextCtrl::Remove(long from, long to)
 499 {
 500     HWND hWnd = GetHwnd();
 501     long fromChar = from;
 502     long toChar = to;
 503
 504     // Cut all selected text
 505 #ifdef __WIN32__
 506     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 507 #else
 508     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 509 #endif
 510     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 511 }
 512
 513 void wxTextCtrl::SetSelection(long from, long to)
 514 {
 515     HWND hWnd = GetHwnd();
 516     long fromChar = from;
 517     long toChar = to;
 518     // if from and to are both -1, it means
 519     // (in wxWindows) that all text should be selected.
 520     // This translates into Windows convention
 521     if ((from == -1) && (to == -1))
 522     {
 523       fromChar = 0;
 524       toChar = -1;
 525     }
 526
 527 #ifdef __WIN32__
 528     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 529     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 530 #else
 531     // WPARAM is 0: selection is scrolled into view
 532     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 533 #endif
 534 }
 535
 536 bool wxTextCtrl::LoadFile(const wxString& file)
 537 {
 538   if (!wxFileExists(WXSTRINGCAST file))
 539     return FALSE;
 540
 541   m_fileName = file;
 542
 543   Clear();
 544
 545 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 546   ifstream input(WXSTRINGCAST file, ios::in);
 547
 548   if (!input.bad())
 549   {
 550       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 551       // line by line into the control. Apart from being very slow this
 552       // was limited to 32K of text by the external interface presenting
 553       // positions as signed shorts. Now load in one chunk...
 554       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 555
 556 #ifdef __SALFORDC__
 557       struct _stat stat_buf;
 558       if (stat((char*) (const char*) file, &stat_buf) < 0)
 559         return FALSE;
 560 #else
 561       struct stat stat_buf;
 562       if (stat(file, &stat_buf) < 0)
 563         return FALSE;
 564 #endif
 565
 566 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 567       // This may need to be a bigger buffer than the file size suggests,
 568       // if it's a UNIX file. Give it an extra 1000 just in case.
 569       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 570       long no_lines = 0;
 571       long pos = 0;
 572       while (!input.eof() && input.peek() != EOF)
 573       {
 574         input.getline(wxBuffer, 500);
 575   int len = strlen(wxBuffer);
 576   wxBuffer[len] = 13;
 577   wxBuffer[len+1] = 10;
 578   wxBuffer[len+2] = 0;
 579   strcpy(tmp_buffer+pos, wxBuffer);
 580   pos += strlen(wxBuffer);
 581   no_lines++;
 582       }
 583
 584       SetWindowText(GetHwnd(), tmp_buffer);
 585       SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 586       farfree(tmp_buffer);
 587
 588       // update the size limit if needed
 589       AdjustSpaceLimit();
 590
 591       return TRUE;
 592   }
 593   return FALSE;
 594 }
 595
 596 // If file is null, try saved file name first
 597 // Returns TRUE if succeeds.
 598 bool wxTextCtrl::SaveFile(const wxString& file)
 599 {
 600     wxString theFile(file);
 601
 602     if (theFile == "")
 603         theFile = m_fileName;
 604
 605     if (theFile == "")
 606         return FALSE;
 607
 608     m_fileName = theFile;
 609
 610     ofstream output((char*) (const char*) theFile);
 611     if (output.bad())
 612         return FALSE;
 613
 614     // This will only save 64K max
 615     unsigned long nbytes = SendMessage(GetHwnd(), WM_GETTEXTLENGTH, 0, 0);
 616     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 617     SendMessage(GetHwnd(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 618     char *pstr = tmp_buffer;
 619
 620     // Convert \r\n to just \n
 621     while (*pstr)
 622     {
 623       if (*pstr != '\r')
 624         output << *pstr;
 625       pstr++;
 626     }
 627
 628     farfree(tmp_buffer);
 629     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 630
 631     return TRUE;
 632 }
 633
 634 void wxTextCtrl::WriteText(const wxString& text)
 635 {
 636     // Covert \n to \r\n
 637     int len = text.Length();
 638     char *newtext = new char[(len*2)+1];
 639     int i = 0;
 640     int j = 0;
 641     while (i < len)
 642     {
 643       if (text[i] == '\n')
 644       {
 645         newtext[j] = '\r';
 646         j ++;
 647       }
 648       newtext[j] = text[i];
 649       i ++;
 650       j ++;
 651     }
 652     newtext[j] = 0;
 653     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)newtext);
 654     delete[] newtext;
 655
 656     AdjustSpaceLimit();
 657 }
 658
 659 void wxTextCtrl::AppendText(const wxString& text)
 660 {
 661     SetInsertionPointEnd();
 662     WriteText(text);
 663 }
 664
 665 void wxTextCtrl::Clear()
 666 {
 667     SetWindowText(GetHwnd(), "");
 668 }
 669
 670 bool wxTextCtrl::IsModified() const
 671 {
 672     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 673 }
 674
 675 // Makes 'unmodified'
 676 void wxTextCtrl::DiscardEdits()
 677 {
 678   SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 679 }
 680
 681 /*
 682  * Some of the following functions are yet to be implemented
 683  *
 684  */
 685
 686 int wxTextCtrl::GetNumberOfLines() const
 687 {
 688     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 689 }
 690
 691 long wxTextCtrl::XYToPosition(long x, long y) const
 692 {
 693     HWND hWnd = GetHwnd();
 694
 695     // This gets the char index for the _beginning_ of this line
 696     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 697     return (long)(x + charIndex);
 698 }
 699
 700 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 701 {
 702     HWND hWnd = GetHwnd();
 703
 704     // This gets the line number containing the character
 705     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 706     // This gets the char index for the _beginning_ of this line
 707     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 708     // The X position must therefore be the different between pos and charIndex
 709     *x = (long)(pos - charIndex);
 710     *y = (long)lineNo;
 711 }
 712
 713 void wxTextCtrl::ShowPosition(long pos)
 714 {
 715     HWND hWnd = GetHwnd();
 716
 717     // To scroll to a position, we pass the number of lines and characters
 718     // to scroll *by*. This means that we need to:
 719     // (1) Find the line position of the current line.
 720     // (2) Find the line position of pos.
 721     // (3) Scroll by (pos - current).
 722     // For now, ignore the horizontal scrolling.
 723
 724     // Is this where scrolling is relative to - the line containing the caret?
 725     // Or is the first visible line??? Try first visible line.
 726 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 727
 728     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 729
 730     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 731
 732     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 733
 734     if (linesToScroll != 0)
 735       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 736 }
 737
 738 int wxTextCtrl::GetLineLength(long lineNo) const
 739 {
 740     long charIndex = XYToPosition(0, lineNo);
 741     HWND hWnd = GetHwnd();
 742     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 743     return len;
 744 }
 745
 746 wxString wxTextCtrl::GetLineText(long lineNo) const
 747 {
 748     HWND hWnd = GetHwnd();
 749     *(WORD *)wxBuffer = 512;
 750     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 751     wxBuffer[noChars] = 0;
 752   return wxString(wxBuffer);
 753 }
 754
 755 bool wxTextCtrl::CanCopy() const
 756 {
 757     // Can copy if there's a selection
 758     long from, to;
 759     GetSelection(& from, & to);
 760     return (from != to) ;
 761 }
 762
 763 bool wxTextCtrl::CanCut() const
 764 {
 765     // Can cut if there's a selection
 766     long from, to;
 767     GetSelection(& from, & to);
 768     return (from != to) ;
 769 }
 770
 771 bool wxTextCtrl::CanPaste() const
 772 {
 773 #if wxUSE_RICHEDIT
 774     if (m_isRich)
 775     {
 776         int dataFormat = 0; // 0 == any format
 777         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 778     }
 779 #endif
 780     if (!IsEditable())
 781         return FALSE;
 782
 783     // Standard edit control: check for straight text on clipboard
 784     bool isTextAvailable = FALSE;
 785     if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
 786     {
 787         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 788         ::CloseClipboard();
 789     }
 790     return isTextAvailable;
 791 }
 792
 793 // Undo/redo
 794 void wxTextCtrl::Undo()
 795 {
 796     if (CanUndo())
 797     {
 798         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 799     }
 800 }
 801
 802 void wxTextCtrl::Redo()
 803 {
 804     if (CanRedo())
 805     {
 806         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 807         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 808     }
 809 }
 810
 811 bool wxTextCtrl::CanUndo() const
 812 {
 813     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 814 }
 815
 816 bool wxTextCtrl::CanRedo() const
 817 {
 818     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 819 }
 820
 821 // If the return values from and to are the same, there is no
 822 // selection.
 823 void wxTextCtrl::GetSelection(long* from, long* to) const
 824 {
 825 #if wxUSE_RICHEDIT
 826     if (m_isRich)
 827     {
 828         CHARRANGE charRange;
 829         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 830
 831         *from = charRange.cpMin;
 832         *to = charRange.cpMax;
 833
 834         return;
 835     }
 836 #endif
 837     DWORD dwStart, dwEnd;
 838     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 839     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 840
 841     ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 842
 843     *from = dwStart;
 844     *to = dwEnd;
 845 }
 846
 847 bool wxTextCtrl::IsEditable() const
 848 {
 849     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 850
 851     return ((style & ES_READONLY) == 0);
 852 }
 853
 854 void wxTextCtrl::Command(wxCommandEvent & event)
 855 {
 856   SetValue (event.GetString());
 857   ProcessCommand (event);
 858 }
 859
 860 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 861 {
 862   // By default, load the first file into the text window.
 863   if (event.GetNumberOfFiles() > 0)
 864   {
 865     LoadFile(event.GetFiles()[0]);
 866   }
 867 }
 868
 869 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 870 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 871
 872 //=========================================================================
 873 // Called then the buffer is full (gcc 2.6.3)
 874 // or when "endl" is output (Borland 4.5)
 875 //=========================================================================
 876 // Class declaration using multiple inheritance doesn't work properly for
 877 // Borland. See note in textctrl.h.
 878 #ifndef NO_TEXT_WINDOW_STREAM
 879 int wxTextCtrl::overflow(int c)
 880 {
 881   // Make sure there is a holding area
 882   // this is not needed in <iostream> usage as it automagically allocates
 883   // it, but does someone want to emulate it for safety's sake?
 884 #if wxUSE_IOSTREAMH
 885   if ( allocate()==EOF )
 886   {
 887     wxLogError("Streambuf allocation failed");
 888     return EOF;
 889   }
 890 #endif
 891
 892   // Verify that there are no characters in get area
 893   if ( gptr() && gptr() < egptr() )
 894   {
 895      wxError("Who's trespassing my get area?","Internal error");
 896      return EOF;
 897   }
 898
 899   // Reset get area
 900   setg(0,0,0);
 901
 902   // Make sure there is a put area
 903   if ( ! pptr() )
 904   {
 905 /* This doesn't seem to be fatal so comment out error message */
 906 //    wxError("Put area not opened","Internal error");
 907
 908 #if wxUSE_IOSTREAMH
 909           setp( base(), base() );
 910 #else
 911           setp( pbase(), pbase() );
 912 #endif
 913   }
 914
 915   // Determine how many characters have been inserted but no consumed
 916   int plen = pptr() - pbase();
 917
 918   // Now Jerry relies on the fact that the buffer is at least 2 chars
 919   // long, but the holding area "may be as small as 1" ???
 920   // And we need an additional \0, so let's keep this inefficient but
 921   // safe copy.
 922
 923   // If c!=EOF, it is a character that must also be comsumed
 924   int xtra = c==EOF? 0 : 1;
 925
 926   // Write temporary C-string to wxTextWindow
 927   {
 928   char *txt = new char[plen+xtra+1];
 929   memcpy(txt, pbase(), plen);
 930   txt[plen] = (char)c;     // append c
 931   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 932     // If the put area already contained \0, output will be truncated there
 933   AppendText(txt);
 934     delete[] txt;
 935   }
 936
 937   // Reset put area
 938   setp(pbase(), epptr());
 939
 940 #if defined(__WATCOMC__)
 941   return __NOT_EOF;
 942 #elif defined(zapeof)     // HP-UX (all cfront based?)
 943   return zapeof(c);
 944 #else
 945   return c!=EOF ? c : 0;  // this should make everybody happy
 946 #endif
 947
 948 /* OLD CODE
 949   int len = pptr() - pbase();
 950   char *txt = new char[len+1];
 951   strncpy(txt, pbase(), len);
 952   txt[len] = '\0';
 953   (*this) << txt;
 954   setp(pbase(), epptr());
 955   delete[] txt;
 956   return EOF;
 957 */
 958 }
 959
 960 //=========================================================================
 961 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 962 //=========================================================================
 963 int wxTextCtrl::sync()
 964 {
 965   // Verify that there are no characters in get area
 966   if ( gptr() && gptr() < egptr() )
 967   {
 968      wxError("Who's trespassing my get area?","Internal error");
 969      return EOF;
 970   }
 971
 972   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 973
 974   return 0;
 975 /* OLD CODE
 976   int len = pptr() - pbase();
 977   char *txt = new char[len+1];
 978   strncpy(txt, pbase(), len);
 979   txt[len] = '\0';
 980   (*this) << txt;
 981   setp(pbase(), epptr());
 982   delete[] txt;
 983   return 0;
 984 */
 985 }
 986
 987 //=========================================================================
 988 // Should not be called by a "ostream". Used by a "istream"
 989 //=========================================================================
 990 int wxTextCtrl::underflow()
 991 {
 992   return EOF;
 993 }
 994 #endif
 995
 996 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 997 {
 998     AppendText(s);
 999     return *this;
1000 }
1001
1002 wxTextCtrl& wxTextCtrl::operator<<(float f)
1003 {
1004     wxString str;
1005     str.Printf("%.2f", f);
1006     AppendText(str);
1007     return *this;
1008 }
1009
1010 wxTextCtrl& wxTextCtrl::operator<<(double d)
1011 {
1012     wxString str;
1013     str.Printf("%.2f", d);
1014     AppendText(str);
1015     return *this;
1016 }
1017
1018 wxTextCtrl& wxTextCtrl::operator<<(int i)
1019 {
1020     wxString str;
1021     str.Printf("%d", i);
1022     AppendText(str);
1023     return *this;
1024 }
1025
1026 wxTextCtrl& wxTextCtrl::operator<<(long i)
1027 {
1028     wxString str;
1029     str.Printf("%ld", i);
1030     AppendText(str);
1031     return *this;
1032 }
1033
1034 wxTextCtrl& wxTextCtrl::operator<<(const char c)
1035 {
1036     char buf[2];
1037
1038     buf[0] = c;
1039     buf[1] = 0;
1040     AppendText(buf);
1041     return *this;
1042 }
1043
1044 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1045       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1046 {
1047 #if wxUSE_CTL3D
1048   if ( m_useCtl3D )
1049   {
1050     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1051     return (WXHBRUSH) hbrush;
1052   }
1053 #endif
1054
1055   if (GetParent()->GetTransparentBackground())
1056     SetBkMode((HDC) pDC, TRANSPARENT);
1057   else
1058     SetBkMode((HDC) pDC, OPAQUE);
1059
1060   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1061   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1062
1063   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1064
1065   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1066   // has a zero usage count.
1067   // NOT NOW - will be cleaned up at end of app.
1068 //  backgroundBrush->RealizeResource();
1069   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1070 }
1071
1072 void wxTextCtrl::OnChar(wxKeyEvent& event)
1073 {
1074     switch ( event.KeyCode() )
1075     {
1076         case WXK_RETURN:
1077             if ( !(m_windowStyle & wxTE_MULTILINE) )
1078             {
1079                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1080                 event.SetEventObject( this );
1081                 if ( GetEventHandler()->ProcessEvent(event) )
1082                     return;
1083             }
1084             //else: multiline controls need Enter for themselves
1085
1086             break;
1087
1088         case WXK_TAB:
1089             // only produce navigation event if we don't process TAB ourself or
1090             // if it's a Shift-Tab keypress (we assume nobody will ever need
1091             // this key combo for himself)
1092             //
1093             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1094             //     handled by Windows
1095             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
1096             {
1097                 wxNavigationKeyEvent eventNav;
1098                 eventNav.SetDirection(!event.ShiftDown());
1099                 eventNav.SetWindowChange(FALSE);
1100                 eventNav.SetEventObject(this);
1101
1102                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1103                     return;
1104             }
1105             break;
1106
1107         default:
1108             event.Skip();
1109             return;
1110     }
1111
1112     // don't just call event.Skip() because this will cause TABs and ENTERs
1113     // be passed upwards and we don't always want this - instead process it
1114     // right here
1115
1116     // FIXME
1117     event.Skip();
1118 }
1119
1120 long wxTextCtrl::MSWGetDlgCode()
1121 {
1122     // we always want the characters and the arrows
1123     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1124
1125     // we may have several different cases:
1126     // 1. normal case: both TAB and ENTER are used for dialog navigation
1127     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1128     //    control in the dialog
1129     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1130     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1131     //    the next control
1132     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1133         lRc |= DLGC_WANTMESSAGE;
1134     if ( m_windowStyle & wxTE_PROCESS_TAB )
1135         lRc |= DLGC_WANTTAB;
1136
1137     return lRc;
1138 }
1139
1140 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1141 {
1142     switch (param)
1143     {
1144         case EN_SETFOCUS:
1145         case EN_KILLFOCUS:
1146             {
1147                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1148                         : wxEVT_SET_FOCUS,
1149                         m_windowId);
1150                 event.SetEventObject( this );
1151                 GetEventHandler()->ProcessEvent(event);
1152             }
1153             break;
1154
1155         case EN_CHANGE:
1156             {
1157                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1158                 wxString val(GetValue());
1159                 if ( !val.IsNull() )
1160                     event.m_commandString = WXSTRINGCAST val;
1161                 event.SetEventObject( this );
1162                 ProcessCommand(event);
1163             }
1164             break;
1165
1166         case EN_ERRSPACE:
1167             // the text size limit has been hit - increase it
1168             AdjustSpaceLimit();
1169             break;
1170
1171             // the other notification messages are not processed
1172         case EN_UPDATE:
1173         case EN_MAXTEXT:
1174         case EN_HSCROLL:
1175         case EN_VSCROLL:
1176         default:
1177             return FALSE;
1178     }
1179
1180     // processed
1181     return TRUE;
1182 }
1183
1184 void wxTextCtrl::AdjustSpaceLimit()
1185 {
1186     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1187     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1188     if ( len > limit )
1189     {
1190         limit = len + 0x8000;    // 32Kb
1191
1192         if ( m_isRich || limit > 0xffff )
1193             ::SendMessage(GetHwnd(), EM_LIMITTEXT, 0, limit);
1194         else
1195             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1196     }
1197 }
1198
1199 // For Rich Edit controls. Do we need it?
1200 #if 0
1201 #if wxUSE_RICHEDIT
1202 bool wxTextCtrl::MSWOnNotify(WXWPARAM wParam, WXLPARAM lParam)
1203 {
1204   wxCommandEvent event(0, m_windowId);
1205   int eventType = 0;
1206   NMHDR *hdr1 = (NMHDR *) lParam;
1207   switch ( hdr1->code )
1208   {
1209     // Insert case code here
1210     default :
1211       return wxControl::MSWOnNotify(wParam, lParam);
1212       break;
1213   }
1214
1215   event.SetEventObject( this );
1216   event.SetEventType(eventType);
1217
1218   if ( !GetEventHandler()->ProcessEvent(event) )
1219     return FALSE;
1220
1221     return TRUE;
1222 }
1223 #endif
1224 #endif
1225
1226 void wxTextCtrl::OnCut(wxCommandEvent& event)
1227 {
1228     Cut();
1229 }
1230
1231 void wxTextCtrl::OnCopy(wxCommandEvent& event)
1232 {
1233     Copy();
1234 }
1235
1236 void wxTextCtrl::OnPaste(wxCommandEvent& event)
1237 {
1238     Paste();
1239 }
1240
1241 void wxTextCtrl::OnUndo(wxCommandEvent& event)
1242 {
1243     Undo();
1244 }
1245
1246 void wxTextCtrl::OnRedo(wxCommandEvent& event)
1247 {
1248     Redo();
1249 }
1250
1251 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1252 {
1253     event.Enable( CanCut() );
1254 }
1255
1256 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1257 {
1258     event.Enable( CanCopy() );
1259 }
1260
1261 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1262 {
1263     event.Enable( CanPaste() );
1264 }
1265
1266 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1267 {
1268     event.Enable( CanUndo() );
1269 }
1270
1271 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1272 {
1273     event.Enable( CanRedo() );
1274 }
1275