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 = (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     int length = GetWindowTextLength((HWND) GetHWND());
 287     char *s = new char[length+1];
 288     GetWindowText((HWND) GetHWND(), s, length+1);
 289     wxString str(s);
 290     delete[] s;
 291   return str;
 292 }
 293
 294 void wxTextCtrl::SetValue(const wxString& value)
 295 {
 296   // If newlines are denoted by just 10, must stick 13 in front.
 297   int singletons = 0;
 298   int len = value.Length();
 299   int i;
 300   for (i = 0; i < len; i ++)
 301   {
 302     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 303       singletons ++;
 304   }
 305   if (singletons > 0)
 306   {
 307     char *tmp = new char[len + singletons + 1];
 308     int j = 0;
 309     for (i = 0; i < len; i ++)
 310     {
 311       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 312       {
 313         tmp[j] = 13;
 314         j ++;
 315       }
 316       tmp[j] = value[i];
 317       j ++;
 318     }
 319     tmp[j] = 0;
 320     SetWindowText((HWND) GetHWND(), tmp);
 321     delete[] tmp;
 322   }
 323   else
 324     SetWindowText((HWND) GetHWND(), (const char *)value);
 325 }
 326
 327 void wxTextCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 328 {
 329   int currentX, currentY;
 330   GetPosition(&currentX, &currentY);
 331   int x1 = x;
 332   int y1 = y;
 333   int w1 = width;
 334   int h1 = height;
 335
 336   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 337     x1 = currentX;
 338   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 339     y1 = currentY;
 340
 341   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 342
 343   int cx; // button font dimensions
 344   int cy;
 345
 346   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 347
 348   int control_width, control_height, control_x, control_y;
 349
 350   // If we're prepared to use the existing size, then...
 351   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 352   {
 353     GetSize(&w1, &h1);
 354   }
 355
 356   // Deal with default size (using -1 values)
 357   if (w1<=0)
 358     w1 = DEFAULT_ITEM_WIDTH;
 359
 360   control_x = x1;
 361   control_y = y1;
 362   control_width = w1;
 363   control_height = h1;
 364
 365   // Calculations may have made text size too small
 366   if (control_height <= 0)
 367     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 368
 369   if (control_width <= 0)
 370     control_width = DEFAULT_ITEM_WIDTH;
 371
 372   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 373                               (int)control_width, (int)control_height, TRUE);
 374 }
 375
 376 // Clipboard operations
 377 void wxTextCtrl::Copy()
 378 {
 379     if (CanCopy())
 380     {
 381         HWND hWnd = (HWND) GetHWND();
 382         SendMessage(hWnd, WM_COPY, 0, 0L);
 383     }
 384 }
 385
 386 void wxTextCtrl::Cut()
 387 {
 388     if (CanCut())
 389     {
 390         HWND hWnd = (HWND) GetHWND();
 391         SendMessage(hWnd, WM_CUT, 0, 0L);
 392     }
 393 }
 394
 395 void wxTextCtrl::Paste()
 396 {
 397     if (CanPaste())
 398     {
 399         HWND hWnd = (HWND) GetHWND();
 400         SendMessage(hWnd, WM_PASTE, 0, 0L);
 401     }
 402 }
 403
 404 void wxTextCtrl::SetEditable(bool editable)
 405 {
 406   HWND hWnd = (HWND) GetHWND();
 407   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 408 }
 409
 410 void wxTextCtrl::SetInsertionPoint(long pos)
 411 {
 412   HWND hWnd = (HWND) GetHWND();
 413 #ifdef __WIN32__
 414 #if wxUSE_RICHEDIT
 415   if ( m_isRich)
 416   {
 417     CHARRANGE range;
 418     range.cpMin = pos;
 419     range.cpMax = pos;
 420     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 421     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 422   }
 423   else
 424 #endif
 425   {
 426     SendMessage(hWnd, EM_SETSEL, pos, pos);
 427     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 428   }
 429 #else
 430   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 431 #endif
 432   char *nothing = "";
 433   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 434 }
 435
 436 void wxTextCtrl::SetInsertionPointEnd()
 437 {
 438   long pos = GetLastPosition();
 439   SetInsertionPoint(pos);
 440 }
 441
 442 long wxTextCtrl::GetInsertionPoint() const
 443 {
 444 #if wxUSE_RICHEDIT
 445   if (m_isRich)
 446   {
 447     CHARRANGE range;
 448     range.cpMin = 0;
 449     range.cpMax = 0;
 450     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 451     return range.cpMin;
 452   }
 453 #endif
 454
 455   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 456   return Pos&0xFFFF;
 457 }
 458
 459 long wxTextCtrl::GetLastPosition() const
 460 {
 461     HWND hWnd = (HWND) GetHWND();
 462
 463     // Will always return a number > 0 (according to docs)
 464     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 465
 466     // This gets the char index for the _beginning_ of the last line
 467     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 468
 469     // Get number of characters in the last line. We'll add this to the character
 470     // index for the last line, 1st position.
 471     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 472
 473     return (long)(charIndex + lineLength);
 474 }
 475
 476 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 477 {
 478 #if wxUSE_CLIPBOARD
 479     HWND hWnd = (HWND) GetHWND();
 480     long fromChar = from;
 481     long toChar = to;
 482
 483     // Set selection and remove it
 484 #ifdef __WIN32__
 485     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 486 #else
 487     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 488 #endif
 489     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 490
 491     // Now replace with 'value', by pasting.
 492     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 493
 494     // Paste into edit control
 495     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 496 #else
 497     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 498 #endif
 499 }
 500
 501 void wxTextCtrl::Remove(long from, long to)
 502 {
 503     HWND hWnd = (HWND) GetHWND();
 504     long fromChar = from;
 505     long toChar = to;
 506
 507     // Cut all selected text
 508 #ifdef __WIN32__
 509     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 510 #else
 511     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 512 #endif
 513     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 514 }
 515
 516 void wxTextCtrl::SetSelection(long from, long to)
 517 {
 518     HWND hWnd = (HWND) GetHWND();
 519     long fromChar = from;
 520     long toChar = to;
 521     // if from and to are both -1, it means
 522     // (in wxWindows) that all text should be selected.
 523     // This translates into Windows convention
 524     if ((from == -1) && (to == -1))
 525     {
 526       fromChar = 0;
 527       toChar = -1;
 528     }
 529
 530 #ifdef __WIN32__
 531     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 532     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 533 #else
 534     // WPARAM is 0: selection is scrolled into view
 535     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 536 #endif
 537 }
 538
 539 bool wxTextCtrl::LoadFile(const wxString& file)
 540 {
 541   if (!wxFileExists(WXSTRINGCAST file))
 542     return FALSE;
 543
 544   m_fileName = file;
 545
 546   Clear();
 547
 548 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 549   ifstream input(WXSTRINGCAST file, ios::in);
 550
 551   if (!input.bad())
 552   {
 553       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 554       // line by line into the control. Apart from being very slow this
 555       // was limited to 32K of text by the external interface presenting
 556       // positions as signed shorts. Now load in one chunk...
 557       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 558
 559 #ifdef __SALFORDC__
 560       struct _stat stat_buf;
 561       if (stat((char*) (const char*) file, &stat_buf) < 0)
 562         return FALSE;
 563 #else
 564       struct stat stat_buf;
 565       if (stat(file, &stat_buf) < 0)
 566         return FALSE;
 567 #endif
 568
 569 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 570       // This may need to be a bigger buffer than the file size suggests,
 571       // if it's a UNIX file. Give it an extra 1000 just in case.
 572       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 573       long no_lines = 0;
 574       long pos = 0;
 575       while (!input.eof() && input.peek() != EOF)
 576       {
 577         input.getline(wxBuffer, 500);
 578   int len = strlen(wxBuffer);
 579   wxBuffer[len] = 13;
 580   wxBuffer[len+1] = 10;
 581   wxBuffer[len+2] = 0;
 582   strcpy(tmp_buffer+pos, wxBuffer);
 583   pos += strlen(wxBuffer);
 584   no_lines++;
 585       }
 586
 587 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 588       SetWindowText((HWND) GetHWND(), tmp_buffer);
 589       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 590       farfree(tmp_buffer);
 591
 592       return TRUE;
 593   }
 594   return FALSE;
 595 }
 596
 597 // If file is null, try saved file name first
 598 // Returns TRUE if succeeds.
 599 bool wxTextCtrl::SaveFile(const wxString& file)
 600 {
 601     wxString theFile(file);
 602
 603     if (theFile == "")
 604         theFile = m_fileName;
 605
 606     if (theFile == "")
 607         return FALSE;
 608
 609     m_fileName = theFile;
 610
 611     ofstream output((char*) (const char*) theFile);
 612     if (output.bad())
 613         return FALSE;
 614
 615     // This will only save 64K max
 616     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 617     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 618     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 619     char *pstr = tmp_buffer;
 620
 621     // Convert \r\n to just \n
 622     while (*pstr)
 623     {
 624       if (*pstr != '\r')
 625         output << *pstr;
 626       pstr++;
 627     }
 628
 629     farfree(tmp_buffer);
 630     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 631
 632     return TRUE;
 633 }
 634
 635 void wxTextCtrl::WriteText(const wxString& text)
 636 {
 637     // Covert \n to \r\n
 638     int len = text.Length();
 639     char *newtext = new char[(len*2)+1];
 640     int i = 0;
 641     int j = 0;
 642     while (i < len)
 643     {
 644       if (text[i] == '\n')
 645       {
 646         newtext[j] = '\r';
 647         j ++;
 648       }
 649       newtext[j] = text[i];
 650       i ++;
 651       j ++;
 652     }
 653     newtext[j] = 0;
 654     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 655     delete[] newtext;
 656 }
 657
 658 void wxTextCtrl::AppendText(const wxString& text)
 659 {
 660     SetInsertionPointEnd();
 661     WriteText(text);
 662 }
 663
 664 void wxTextCtrl::Clear()
 665 {
 666     SetWindowText((HWND) GetHWND(), "");
 667 }
 668
 669 bool wxTextCtrl::IsModified() const
 670 {
 671     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 672 }
 673
 674 // Makes 'unmodified'
 675 void wxTextCtrl::DiscardEdits()
 676 {
 677   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 678 }
 679
 680 /*
 681  * Some of the following functions are yet to be implemented
 682  *
 683  */
 684
 685 int wxTextCtrl::GetNumberOfLines() const
 686 {
 687     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 688 }
 689
 690 long wxTextCtrl::XYToPosition(long x, long y) const
 691 {
 692     HWND hWnd = (HWND) GetHWND();
 693
 694     // This gets the char index for the _beginning_ of this line
 695     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 696     return (long)(x + charIndex);
 697 }
 698
 699 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 700 {
 701     HWND hWnd = (HWND) GetHWND();
 702
 703     // This gets the line number containing the character
 704     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 705     // This gets the char index for the _beginning_ of this line
 706     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 707     // The X position must therefore be the different between pos and charIndex
 708     *x = (long)(pos - charIndex);
 709     *y = (long)lineNo;
 710 }
 711
 712 void wxTextCtrl::ShowPosition(long pos)
 713 {
 714     HWND hWnd = (HWND) GetHWND();
 715
 716     // To scroll to a position, we pass the number of lines and characters
 717     // to scroll *by*. This means that we need to:
 718     // (1) Find the line position of the current line.
 719     // (2) Find the line position of pos.
 720     // (3) Scroll by (pos - current).
 721     // For now, ignore the horizontal scrolling.
 722
 723     // Is this where scrolling is relative to - the line containing the caret?
 724     // Or is the first visible line??? Try first visible line.
 725 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 726
 727     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 728
 729     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 730
 731     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 732
 733     if (linesToScroll != 0)
 734       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 735 }
 736
 737 int wxTextCtrl::GetLineLength(long lineNo) const
 738 {
 739     long charIndex = XYToPosition(0, lineNo);
 740     HWND hWnd = (HWND) GetHWND();
 741     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 742     return len;
 743 }
 744
 745 wxString wxTextCtrl::GetLineText(long lineNo) const
 746 {
 747     HWND hWnd = (HWND) GetHWND();
 748     *(WORD *)wxBuffer = 512;
 749     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 750     wxBuffer[noChars] = 0;
 751   return wxString(wxBuffer);
 752 }
 753
 754 bool wxTextCtrl::CanCopy() const
 755 {
 756     // Can copy if there's a selection
 757     long from, to;
 758     GetSelection(& from, & to);
 759     return (from != to) ;
 760 }
 761
 762 bool wxTextCtrl::CanCut() const
 763 {
 764     // Can cut if there's a selection
 765     long from, to;
 766     GetSelection(& from, & to);
 767     return (from != to) ;
 768 }
 769
 770 bool wxTextCtrl::CanPaste() const
 771 {
 772 #if wxUSE_RICHEDIT
 773     if (m_isRich)
 774     {
 775         int dataFormat = 0; // 0 == any format
 776         return (::SendMessage( (HWND) GetHWND(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 777     }
 778 #endif
 779     if (!IsEditable())
 780         return FALSE;
 781
 782     // Standard edit control: check for straight text on clipboard
 783     bool isTextAvailable = FALSE;
 784     if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
 785     {
 786         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 787         ::CloseClipboard();
 788     }
 789     return isTextAvailable;
 790 }
 791
 792 // Undo/redo
 793 void wxTextCtrl::Undo()
 794 {
 795     if (CanUndo())
 796     {
 797         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 798     }
 799 }
 800
 801 void wxTextCtrl::Redo()
 802 {
 803     if (CanRedo())
 804     {
 805         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 806         ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
 807     }
 808 }
 809
 810 bool wxTextCtrl::CanUndo() const
 811 {
 812     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 813 }
 814
 815 bool wxTextCtrl::CanRedo() const
 816 {
 817     return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
 818 }
 819
 820 // If the return values from and to are the same, there is no
 821 // selection.
 822 void wxTextCtrl::GetSelection(long* from, long* to) const
 823 {
 824 #if wxUSE_RICHEDIT
 825     if (m_isRich)
 826     {
 827         CHARRANGE charRange;
 828         ::SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 829
 830         *from = charRange.cpMin;
 831         *to = charRange.cpMax;
 832
 833         return;
 834     }
 835 #endif
 836     DWORD dwStart, dwEnd;
 837     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 838     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 839
 840     ::SendMessage((HWND) GetHWND(), EM_GETSEL, wParam, lParam);
 841
 842     *from = dwStart;
 843     *to = dwEnd;
 844 }
 845
 846 bool wxTextCtrl::IsEditable() const
 847 {
 848     long style = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
 849     return ((style & ES_READONLY) == 0);
 850 }
 851
 852 void wxTextCtrl::Command(wxCommandEvent & event)
 853 {
 854   SetValue (event.GetString());
 855   ProcessCommand (event);
 856 }
 857
 858 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 859 {
 860   // By default, load the first file into the text window.
 861   if (event.GetNumberOfFiles() > 0)
 862   {
 863     LoadFile(event.GetFiles()[0]);
 864   }
 865 }
 866
 867 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 868 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 869
 870 //=========================================================================
 871 // Called then the buffer is full (gcc 2.6.3)
 872 // or when "endl" is output (Borland 4.5)
 873 //=========================================================================
 874 // Class declaration using multiple inheritance doesn't work properly for
 875 // Borland. See note in textctrl.h.
 876 #ifndef NO_TEXT_WINDOW_STREAM
 877 int wxTextCtrl::overflow(int c)
 878 {
 879   // Make sure there is a holding area
 880   // this is not needed in <iostream> usage as it automagically allocates
 881   // it, but does someone want to emulate it for safety's sake?
 882 #if wxUSE_IOSTREAMH
 883   if ( allocate()==EOF )
 884   {
 885     wxLogError("Streambuf allocation failed");
 886     return EOF;
 887   }
 888 #endif
 889
 890   // Verify that there are no characters in get area
 891   if ( gptr() && gptr() < egptr() )
 892   {
 893      wxError("Who's trespassing my get area?","Internal error");
 894      return EOF;
 895   }
 896
 897   // Reset get area
 898   setg(0,0,0);
 899
 900   // Make sure there is a put area
 901   if ( ! pptr() )
 902   {
 903 /* This doesn't seem to be fatal so comment out error message */
 904 //    wxError("Put area not opened","Internal error");
 905
 906 #if wxUSE_IOSTREAMH
 907           setp( base(), base() );
 908 #else
 909           setp( pbase(), pbase() );
 910 #endif
 911   }
 912
 913   // Determine how many characters have been inserted but no consumed
 914   int plen = pptr() - pbase();
 915
 916   // Now Jerry relies on the fact that the buffer is at least 2 chars
 917   // long, but the holding area "may be as small as 1" ???
 918   // And we need an additional \0, so let's keep this inefficient but
 919   // safe copy.
 920
 921   // If c!=EOF, it is a character that must also be comsumed
 922   int xtra = c==EOF? 0 : 1;
 923
 924   // Write temporary C-string to wxTextWindow
 925   {
 926   char *txt = new char[plen+xtra+1];
 927   memcpy(txt, pbase(), plen);
 928   txt[plen] = (char)c;     // append c
 929   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 930     // If the put area already contained \0, output will be truncated there
 931   AppendText(txt);
 932     delete[] txt;
 933   }
 934
 935   // Reset put area
 936   setp(pbase(), epptr());
 937
 938 #if defined(__WATCOMC__)
 939   return __NOT_EOF;
 940 #elif defined(zapeof)     // HP-UX (all cfront based?)
 941   return zapeof(c);
 942 #else
 943   return c!=EOF ? c : 0;  // this should make everybody happy
 944 #endif
 945
 946 /* OLD CODE
 947   int len = pptr() - pbase();
 948   char *txt = new char[len+1];
 949   strncpy(txt, pbase(), len);
 950   txt[len] = '\0';
 951   (*this) << txt;
 952   setp(pbase(), epptr());
 953   delete[] txt;
 954   return EOF;
 955 */
 956 }
 957
 958 //=========================================================================
 959 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 960 //=========================================================================
 961 int wxTextCtrl::sync()
 962 {
 963   // Verify that there are no characters in get area
 964   if ( gptr() && gptr() < egptr() )
 965   {
 966      wxError("Who's trespassing my get area?","Internal error");
 967      return EOF;
 968   }
 969
 970   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 971
 972   return 0;
 973 /* OLD CODE
 974   int len = pptr() - pbase();
 975   char *txt = new char[len+1];
 976   strncpy(txt, pbase(), len);
 977   txt[len] = '\0';
 978   (*this) << txt;
 979   setp(pbase(), epptr());
 980   delete[] txt;
 981   return 0;
 982 */
 983 }
 984
 985 //=========================================================================
 986 // Should not be called by a "ostream". Used by a "istream"
 987 //=========================================================================
 988 int wxTextCtrl::underflow()
 989 {
 990   return EOF;
 991 }
 992 #endif
 993
 994 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 995 {
 996     AppendText(s);
 997     return *this;
 998 }
 999
1000 wxTextCtrl& wxTextCtrl::operator<<(float f)
1001 {
1002     wxString str;
1003     str.Printf("%.2f", f);
1004     AppendText(str);
1005     return *this;
1006 }
1007
1008 wxTextCtrl& wxTextCtrl::operator<<(double d)
1009 {
1010     wxString str;
1011     str.Printf("%.2f", d);
1012     AppendText(str);
1013     return *this;
1014 }
1015
1016 wxTextCtrl& wxTextCtrl::operator<<(int i)
1017 {
1018     wxString str;
1019     str.Printf("%d", i);
1020     AppendText(str);
1021     return *this;
1022 }
1023
1024 wxTextCtrl& wxTextCtrl::operator<<(long i)
1025 {
1026     wxString str;
1027     str.Printf("%ld", i);
1028     AppendText(str);
1029     return *this;
1030 }
1031
1032 wxTextCtrl& wxTextCtrl::operator<<(const char c)
1033 {
1034     char buf[2];
1035
1036     buf[0] = c;
1037     buf[1] = 0;
1038     AppendText(buf);
1039     return *this;
1040 }
1041
1042 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
1043       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1044 {
1045 #if wxUSE_CTL3D
1046   if ( m_useCtl3D )
1047   {
1048     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1049     return (WXHBRUSH) hbrush;
1050   }
1051 #endif
1052
1053   if (GetParent()->GetTransparentBackground())
1054     SetBkMode((HDC) pDC, TRANSPARENT);
1055   else
1056     SetBkMode((HDC) pDC, OPAQUE);
1057
1058   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1059   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
1060
1061   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
1062
1063   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
1064   // has a zero usage count.
1065   // NOT NOW - will be cleaned up at end of app.
1066 //  backgroundBrush->RealizeResource();
1067   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
1068 }
1069
1070 void wxTextCtrl::OnChar(wxKeyEvent& event)
1071 {
1072     switch ( event.KeyCode() )
1073     {
1074         case WXK_RETURN:
1075             if ( !(m_windowStyle & wxTE_MULTILINE) )
1076             {
1077                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1078                 event.SetEventObject( this );
1079                 if ( GetEventHandler()->ProcessEvent(event) )
1080                     return;
1081             }
1082             //else: multiline controls need Enter for themselves
1083
1084             break;
1085
1086         case WXK_TAB:
1087             // only produce navigation event if we don't process TAB ourself or
1088             // if it's a Shift-Tab keypress (we assume nobody will ever need
1089             // this key combo for himself)
1090             //
1091             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
1092             //     handled by Windows
1093             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
1094             {
1095                 wxNavigationKeyEvent eventNav;
1096                 eventNav.SetDirection(!event.ShiftDown());
1097                 eventNav.SetWindowChange(FALSE);
1098                 eventNav.SetEventObject(this);
1099
1100                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1101                     return;
1102             }
1103             break;
1104
1105         default:
1106             event.Skip();
1107             return;
1108     }
1109
1110     // don't just call event.Skip() because this will cause TABs and ENTERs
1111     // be passed upwards and we don't always want this - instead process it
1112     // right here
1113
1114     // FIXME
1115     event.Skip();
1116 }
1117
1118 long wxTextCtrl::MSWGetDlgCode()
1119 {
1120     // we always want the characters and the arrows
1121     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1122
1123     // we may have several different cases:
1124     // 1. normal case: both TAB and ENTER are used for dialog navigation
1125     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1126     //    control in the dialog
1127     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1128     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1129     //    the next control
1130     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1131         lRc |= DLGC_WANTMESSAGE;
1132     if ( m_windowStyle & wxTE_PROCESS_TAB )
1133         lRc |= DLGC_WANTTAB;
1134
1135     return lRc;
1136 }
1137
1138 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1139 {
1140 /*
1141   // Debugging
1142   wxDebugMsg("Edit control %d: ", (int)id);
1143   switch (param)
1144   {
1145     case EN_SETFOCUS:
1146       wxDebugMsg("EN_SETFOCUS\n");
1147       break;
1148     case EN_KILLFOCUS:
1149       wxDebugMsg("EN_KILLFOCUS\n");
1150       break;
1151     case EN_CHANGE:
1152       wxDebugMsg("EN_CHANGE\n");
1153       break;
1154     case EN_UPDATE:
1155       wxDebugMsg("EN_UPDATE\n");
1156       break;
1157     case EN_ERRSPACE:
1158       wxDebugMsg("EN_ERRSPACE\n");
1159       break;
1160     case EN_MAXTEXT:
1161       wxDebugMsg("EN_MAXTEXT\n");
1162       break;
1163     case EN_HSCROLL:
1164       wxDebugMsg("EN_HSCROLL\n");
1165       break;
1166     case EN_VSCROLL:
1167       wxDebugMsg("EN_VSCROLL\n");
1168       break;
1169     default:
1170       wxDebugMsg("Unknown EDIT notification\n");
1171       break;
1172   }
1173 */
1174   switch (param)
1175   {
1176     case EN_SETFOCUS:
1177     case EN_KILLFOCUS:
1178       {
1179         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1180                                                  : wxEVT_SET_FOCUS,
1181                            m_windowId);
1182         event.SetEventObject( this );
1183         GetEventHandler()->ProcessEvent(event);
1184       }
1185       break;
1186
1187     case EN_CHANGE:
1188       {
1189         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1190         wxString val(GetValue());
1191         if ( !val.IsNull() )
1192           event.m_commandString = WXSTRINGCAST val;
1193         event.SetEventObject( this );
1194         ProcessCommand(event);
1195       }
1196       break;
1197
1198     // the other notification messages are not processed
1199     case EN_UPDATE:
1200     case EN_ERRSPACE:
1201     case EN_MAXTEXT:
1202     case EN_HSCROLL:
1203     case EN_VSCROLL:
1204     default:
1205       return FALSE;
1206   }
1207
1208   // processed
1209   return TRUE;
1210 }
1211
1212
1213 // For Rich Edit controls. Do we need it?
1214 #if 0
1215 #if wxUSE_RICHEDIT
1216 bool wxTextCtrl::MSWOnNotify(WXWPARAM wParam, WXLPARAM lParam)
1217 {
1218   wxCommandEvent event(0, m_windowId);
1219   int eventType = 0;
1220   NMHDR *hdr1 = (NMHDR *) lParam;
1221   switch ( hdr1->code )
1222   {
1223     // Insert case code here
1224     default :
1225       return wxControl::MSWOnNotify(wParam, lParam);
1226       break;
1227   }
1228
1229   event.SetEventObject( this );
1230   event.SetEventType(eventType);
1231
1232   if ( !GetEventHandler()->ProcessEvent(event) )
1233     return FALSE;
1234
1235     return TRUE;
1236 }
1237 #endif
1238 #endif
1239
1240 void wxTextCtrl::OnCut(wxCommandEvent& event)
1241 {
1242     Cut();
1243 }
1244
1245 void wxTextCtrl::OnCopy(wxCommandEvent& event)
1246 {
1247     Copy();
1248 }
1249
1250 void wxTextCtrl::OnPaste(wxCommandEvent& event)
1251 {
1252     Paste();
1253 }
1254
1255 void wxTextCtrl::OnUndo(wxCommandEvent& event)
1256 {
1257     Undo();
1258 }
1259
1260 void wxTextCtrl::OnRedo(wxCommandEvent& event)
1261 {
1262     Redo();
1263 }
1264
1265 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1266 {
1267     event.Enable( CanCut() );
1268 }
1269
1270 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1271 {
1272     event.Enable( CanCopy() );
1273 }
1274
1275 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1276 {
1277     event.Enable( CanPaste() );
1278 }
1279
1280 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1281 {
1282     event.Enable( CanUndo() );
1283 }
1284
1285 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1286 {
1287     event.Enable( CanRedo() );
1288 }
1289