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 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  72
  73 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  74   EVT_CHAR(wxTextCtrl::OnChar)
  75   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  76   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  77 END_EVENT_TABLE()
  78 #endif // USE_SHARED_LIBRARY
  79
  80 // Text item
  81 wxTextCtrl::wxTextCtrl()
  82 #ifndef NO_TEXT_WINDOW_STREAM
  83           : streambuf()
  84 #endif
  85 {
  86 #if wxUSE_RICHEDIT
  87   m_isRich = FALSE;
  88 #endif
  89 }
  90
  91 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  92                         const wxString& value,
  93                         const wxPoint& pos,
  94                         const wxSize& size, long style,
  95                         const wxValidator& validator,
  96                         const wxString& name)
  97 {
  98   m_fileName = "";
  99   SetName(name);
 100   SetValidator(validator);
 101   if (parent) parent->AddChild(this);
 102
 103   m_windowStyle = style;
 104
 105   // Should this be taken from the system colours?
 106 //  SetBackgroundColour(wxColour(255, 255, 255));
 107
 108   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 109
 110   SetForegroundColour(parent->GetForegroundColour()) ;
 111
 112   if ( id == -1 )
 113     m_windowId = (int)NewControlId();
 114   else
 115   m_windowId = id;
 116
 117   int x = pos.x;
 118   int y = pos.y;
 119   int width = size.x;
 120   int height = size.y;
 121
 122   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 123   if (m_windowStyle & wxTE_MULTILINE)
 124   {
 125     wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 126                   "wxTE_PROCESS_ENTER style is ignored for multiline controls" );
 127
 128     msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 129     m_windowStyle |= wxTE_PROCESS_ENTER;
 130   }
 131   else
 132     msStyle |= ES_AUTOHSCROLL ;
 133
 134   if (m_windowStyle & wxTE_READONLY)
 135     msStyle |= ES_READONLY;
 136
 137   if (m_windowStyle & wxHSCROLL)
 138     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 139   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 140     msStyle |= ES_PASSWORD;
 141
 142   const char *windowClass = "EDIT";
 143
 144 #if wxUSE_RICHEDIT
 145   if ( m_windowStyle & wxTE_MULTILINE )
 146   {
 147     msStyle |= ES_AUTOVSCROLL;
 148     m_isRich = TRUE;
 149     windowClass = "RichEdit" ;
 150   }
 151   else
 152     m_isRich = FALSE;
 153 #endif
 154
 155   bool want3D;
 156   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 157
 158   // If we're in Win95, and we want a simple 2D border,
 159   // then make it an EDIT control instead.
 160 #if wxUSE_RICHEDIT
 161   if (m_windowStyle & wxSIMPLE_BORDER)
 162   {
 163     windowClass = "EDIT";
 164     m_isRich = FALSE;
 165   }
 166 #endif
 167
 168   // Even with extended styles, need to combine with WS_BORDER
 169   // for them to look right.
 170   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 171     msStyle |= WS_BORDER;
 172
 173   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 174                         msStyle,
 175                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 176                         wxGetInstance(), NULL);
 177
 178   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 179
 180 #if wxUSE_CTL3D
 181   if ( want3D )
 182   {
 183     Ctl3dSubclassCtl((HWND)m_hWnd);
 184     m_useCtl3D = TRUE;
 185   }
 186 #endif
 187
 188 #if wxUSE_RICHEDIT
 189   if (m_isRich)
 190   {
 191     // Have to enable events
 192     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 193                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 194   }
 195 #endif
 196
 197   SubclassWin(GetHWND());
 198
 199   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 200   {
 201     SetFont(parent->GetFont());
 202   }
 203   else
 204   {
 205     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 206   }
 207
 208   SetSize(x, y, width, height);
 209
 210   // Causes a crash for Symantec C++ and WIN32 for some reason
 211 #if !(defined(__SC__) && defined(__WIN32__))
 212   if ( !value.IsEmpty() )
 213   {
 214     SetValue(value);
 215   }
 216 #endif
 217
 218   return TRUE;
 219 }
 220
 221 // Make sure the window style (etc.) reflects the HWND style (roughly)
 222 void wxTextCtrl::AdoptAttributesFromHWND()
 223 {
 224   wxWindow::AdoptAttributesFromHWND();
 225
 226   HWND hWnd = (HWND) GetHWND();
 227   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 228
 229   // retrieve the style to see whether this is an edit or richedit ctrl
 230 #if wxUSE_RICHEDIT
 231   char buf[256];
 232
 233 #ifndef __WIN32__
 234   GetClassName((HWND) hWnd, buf, 256);
 235 #else
 236 #ifdef UNICODE
 237   GetClassNameW((HWND) hWnd, buf, 256);
 238 #else
 239 #ifdef __TWIN32__
 240   GetClassName((HWND) hWnd, buf, 256);
 241 #else
 242   GetClassNameA((HWND) hWnd, buf, 256);
 243 #endif
 244 #endif
 245 #endif
 246
 247   wxString str(buf);
 248   str.UpperCase();
 249
 250   if (str == "EDIT")
 251     m_isRich = FALSE;
 252   else
 253     m_isRich = TRUE;
 254 #endif
 255
 256   if (style & ES_MULTILINE)
 257     m_windowStyle |= wxTE_MULTILINE;
 258   if (style & ES_PASSWORD)
 259     m_windowStyle |= wxTE_PASSWORD;
 260   if (style & ES_READONLY)
 261     m_windowStyle |= wxTE_READONLY;
 262   if (style & ES_WANTRETURN)
 263     m_windowStyle |= wxTE_PROCESS_ENTER;
 264 }
 265
 266 void wxTextCtrl::SetupColours()
 267 {
 268   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 269   SetForegroundColour(GetParent()->GetForegroundColour());
 270 }
 271
 272 wxString wxTextCtrl::GetValue() const
 273 {
 274     int length = GetWindowTextLength((HWND) GetHWND());
 275     char *s = new char[length+1];
 276     GetWindowText((HWND) GetHWND(), s, length+1);
 277     wxString str(s);
 278     delete[] s;
 279   return str;
 280 }
 281
 282 void wxTextCtrl::SetValue(const wxString& value)
 283 {
 284   // If newlines are denoted by just 10, must stick 13 in front.
 285   int singletons = 0;
 286   int len = value.Length();
 287   int i;
 288   for (i = 0; i < len; i ++)
 289   {
 290     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 291       singletons ++;
 292   }
 293   if (singletons > 0)
 294   {
 295     char *tmp = new char[len + singletons + 1];
 296     int j = 0;
 297     for (i = 0; i < len; i ++)
 298     {
 299       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 300       {
 301         tmp[j] = 13;
 302         j ++;
 303       }
 304       tmp[j] = value[i];
 305       j ++;
 306     }
 307     tmp[j] = 0;
 308     SetWindowText((HWND) GetHWND(), tmp);
 309     delete[] tmp;
 310   }
 311   else
 312     SetWindowText((HWND) GetHWND(), (const char *)value);
 313 }
 314
 315 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 316 {
 317   int currentX, currentY;
 318   GetPosition(&currentX, &currentY);
 319   int x1 = x;
 320   int y1 = y;
 321   int w1 = width;
 322   int h1 = height;
 323
 324   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 325     x1 = currentX;
 326   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 327     y1 = currentY;
 328
 329   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 330
 331   int cx; // button font dimensions
 332   int cy;
 333
 334   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 335
 336   int control_width, control_height, control_x, control_y;
 337
 338   // If we're prepared to use the existing size, then...
 339   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 340   {
 341     GetSize(&w1, &h1);
 342   }
 343
 344   // Deal with default size (using -1 values)
 345   if (w1<=0)
 346     w1 = DEFAULT_ITEM_WIDTH;
 347
 348   control_x = x1;
 349   control_y = y1;
 350   control_width = w1;
 351   control_height = h1;
 352
 353   // Calculations may have made text size too small
 354   if (control_height <= 0)
 355     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 356
 357   if (control_width <= 0)
 358     control_width = DEFAULT_ITEM_WIDTH;
 359
 360   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 361                               (int)control_width, (int)control_height, TRUE);
 362 }
 363
 364 // Clipboard operations
 365 void wxTextCtrl::Copy()
 366 {
 367   HWND hWnd = (HWND) GetHWND();
 368   SendMessage(hWnd, WM_COPY, 0, 0L);
 369 }
 370
 371 void wxTextCtrl::Cut()
 372 {
 373   HWND hWnd = (HWND) GetHWND();
 374   SendMessage(hWnd, WM_CUT, 0, 0L);
 375 }
 376
 377 void wxTextCtrl::Paste()
 378 {
 379   HWND hWnd = (HWND) GetHWND();
 380   SendMessage(hWnd, WM_PASTE, 0, 0L);
 381 }
 382
 383 void wxTextCtrl::SetEditable(bool editable)
 384 {
 385   HWND hWnd = (HWND) GetHWND();
 386   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 387 }
 388
 389 void wxTextCtrl::SetInsertionPoint(long pos)
 390 {
 391   HWND hWnd = (HWND) GetHWND();
 392 #ifdef __WIN32__
 393 #if wxUSE_RICHEDIT
 394   if ( m_isRich)
 395   {
 396     CHARRANGE range;
 397     range.cpMin = pos;
 398     range.cpMax = pos;
 399     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 400     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 401   }
 402   else
 403 #endif
 404   {
 405     SendMessage(hWnd, EM_SETSEL, pos, pos);
 406     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 407   }
 408 #else
 409   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 410 #endif
 411   char *nothing = "";
 412   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 413 }
 414
 415 void wxTextCtrl::SetInsertionPointEnd()
 416 {
 417   long pos = GetLastPosition();
 418   SetInsertionPoint(pos);
 419 }
 420
 421 long wxTextCtrl::GetInsertionPoint() const
 422 {
 423 #if wxUSE_RICHEDIT
 424   if (m_isRich)
 425   {
 426     CHARRANGE range;
 427     range.cpMin = 0;
 428     range.cpMax = 0;
 429     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 430     return range.cpMin;
 431   }
 432 #endif
 433
 434   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 435   return Pos&0xFFFF;
 436 }
 437
 438 long wxTextCtrl::GetLastPosition() const
 439 {
 440     HWND hWnd = (HWND) GetHWND();
 441
 442     // Will always return a number > 0 (according to docs)
 443     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 444
 445     // This gets the char index for the _beginning_ of the last line
 446     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 447
 448     // Get number of characters in the last line. We'll add this to the character
 449     // index for the last line, 1st position.
 450     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 451
 452     return (long)(charIndex + lineLength);
 453 }
 454
 455 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 456 {
 457     HWND hWnd = (HWND) GetHWND();
 458     long fromChar = from;
 459     long toChar = to;
 460
 461     // Set selection and remove it
 462 #ifdef __WIN32__
 463     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 464 #else
 465     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 466 #endif
 467     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 468
 469     // Now replace with 'value', by pasting.
 470     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 471
 472     // Paste into edit control
 473     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 474 }
 475
 476 void wxTextCtrl::Remove(long from, long to)
 477 {
 478     HWND hWnd = (HWND) GetHWND();
 479     long fromChar = from;
 480     long toChar = to;
 481
 482     // Cut all selected text
 483 #ifdef __WIN32__
 484     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 485 #else
 486     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 487 #endif
 488     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 489 }
 490
 491 void wxTextCtrl::SetSelection(long from, long to)
 492 {
 493     HWND hWnd = (HWND) GetHWND();
 494     long fromChar = from;
 495     long toChar = to;
 496     // if from and to are both -1, it means
 497     // (in wxWindows) that all text should be selected.
 498     // This translates into Windows convention
 499     if ((from == -1) && (to == -1))
 500     {
 501       fromChar = 0;
 502       toChar = -1;
 503     }
 504
 505 #ifdef __WIN32__
 506     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 507     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 508 #else
 509     // WPARAM is 0: selection is scrolled into view
 510     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 511 #endif
 512 }
 513
 514 bool wxTextCtrl::LoadFile(const wxString& file)
 515 {
 516   if (!wxFileExists(WXSTRINGCAST file))
 517     return FALSE;
 518
 519   m_fileName = file;
 520
 521   Clear();
 522
 523 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 524   ifstream input(WXSTRINGCAST file, ios::in);
 525
 526   if (!input.bad())
 527   {
 528       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 529       // line by line into the control. Apart from being very slow this
 530       // was limited to 32K of text by the external interface presenting
 531       // positions as signed shorts. Now load in one chunk...
 532       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 533
 534 #ifdef __SALFORDC__
 535       struct _stat stat_buf;
 536       if (stat((char*) (const char*) file, &stat_buf) < 0)
 537         return FALSE;
 538 #else
 539       struct stat stat_buf;
 540       if (stat(file, &stat_buf) < 0)
 541         return FALSE;
 542 #endif
 543
 544 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 545       // This may need to be a bigger buffer than the file size suggests,
 546       // if it's a UNIX file. Give it an extra 1000 just in case.
 547       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 548       long no_lines = 0;
 549       long pos = 0;
 550       while (!input.eof() && input.peek() != EOF)
 551       {
 552         input.getline(wxBuffer, 500);
 553   int len = strlen(wxBuffer);
 554   wxBuffer[len] = 13;
 555   wxBuffer[len+1] = 10;
 556   wxBuffer[len+2] = 0;
 557   strcpy(tmp_buffer+pos, wxBuffer);
 558   pos += strlen(wxBuffer);
 559   no_lines++;
 560       }
 561
 562 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 563       SetWindowText((HWND) GetHWND(), tmp_buffer);
 564       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 565       farfree(tmp_buffer);
 566
 567       return TRUE;
 568   }
 569   return FALSE;
 570 }
 571
 572 // If file is null, try saved file name first
 573 // Returns TRUE if succeeds.
 574 bool wxTextCtrl::SaveFile(const wxString& file)
 575 {
 576     wxString theFile(file);
 577
 578     if (theFile == "")
 579         theFile = m_fileName;
 580
 581     if (theFile == "")
 582         return FALSE;
 583
 584     m_fileName = theFile;
 585
 586     ofstream output((char*) (const char*) theFile);
 587     if (output.bad())
 588         return FALSE;
 589
 590     // This will only save 64K max
 591     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 592     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 593     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 594     char *pstr = tmp_buffer;
 595
 596     // Convert \r\n to just \n
 597     while (*pstr)
 598     {
 599       if (*pstr != '\r')
 600         output << *pstr;
 601       pstr++;
 602     }
 603
 604     farfree(tmp_buffer);
 605     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 606
 607     return TRUE;
 608 }
 609
 610 void wxTextCtrl::WriteText(const wxString& text)
 611 {
 612     // Covert \n to \r\n
 613     int len = text.Length();
 614     char *newtext = new char[(len*2)+1];
 615     int i = 0;
 616     int j = 0;
 617     while (i < len)
 618     {
 619       if (text[i] == '\n')
 620       {
 621         newtext[j] = '\r';
 622         j ++;
 623       }
 624       newtext[j] = text[i];
 625       i ++;
 626       j ++;
 627     }
 628     newtext[j] = 0;
 629     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 630     delete[] newtext;
 631 }
 632
 633 void wxTextCtrl::AppendText(const wxString& text)
 634 {
 635     SetInsertionPointEnd();
 636     WriteText(text);
 637 }
 638
 639 void wxTextCtrl::Clear()
 640 {
 641     SetWindowText((HWND) GetHWND(), "");
 642 }
 643
 644 bool wxTextCtrl::IsModified() const
 645 {
 646     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 647 }
 648
 649 // Makes 'unmodified'
 650 void wxTextCtrl::DiscardEdits()
 651 {
 652   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 653 }
 654
 655 /*
 656  * Some of the following functions are yet to be implemented
 657  *
 658  */
 659
 660 int wxTextCtrl::GetNumberOfLines() const
 661 {
 662     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 663 }
 664
 665 long wxTextCtrl::XYToPosition(long x, long y) const
 666 {
 667     HWND hWnd = (HWND) GetHWND();
 668
 669     // This gets the char index for the _beginning_ of this line
 670     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 671     return (long)(x + charIndex);
 672 }
 673
 674 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 675 {
 676     HWND hWnd = (HWND) GetHWND();
 677
 678     // This gets the line number containing the character
 679     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 680     // This gets the char index for the _beginning_ of this line
 681     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 682     // The X position must therefore be the different between pos and charIndex
 683     *x = (long)(pos - charIndex);
 684     *y = (long)lineNo;
 685 }
 686
 687 void wxTextCtrl::ShowPosition(long pos)
 688 {
 689     HWND hWnd = (HWND) GetHWND();
 690
 691     // To scroll to a position, we pass the number of lines and characters
 692     // to scroll *by*. This means that we need to:
 693     // (1) Find the line position of the current line.
 694     // (2) Find the line position of pos.
 695     // (3) Scroll by (pos - current).
 696     // For now, ignore the horizontal scrolling.
 697
 698     // Is this where scrolling is relative to - the line containing the caret?
 699     // Or is the first visible line??? Try first visible line.
 700 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 701
 702     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 703
 704     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 705
 706     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 707
 708 /*
 709     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 710       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 711 */
 712
 713     if (linesToScroll != 0)
 714       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 715 }
 716
 717 int wxTextCtrl::GetLineLength(long lineNo) const
 718 {
 719     long charIndex = XYToPosition(0, lineNo);
 720     HWND hWnd = (HWND) GetHWND();
 721     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 722     return len;
 723 }
 724
 725 wxString wxTextCtrl::GetLineText(long lineNo) const
 726 {
 727     HWND hWnd = (HWND) GetHWND();
 728     *(WORD *)wxBuffer = 512;
 729     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 730     wxBuffer[noChars] = 0;
 731   return wxString(wxBuffer);
 732 }
 733
 734 /*
 735  * Text item
 736  */
 737
 738 void wxTextCtrl::Command(wxCommandEvent & event)
 739 {
 740   SetValue (event.GetString());
 741   ProcessCommand (event);
 742 }
 743
 744 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 745 {
 746   // By default, load the first file into the text window.
 747   if (event.GetNumberOfFiles() > 0)
 748   {
 749     LoadFile(event.GetFiles()[0]);
 750   }
 751 }
 752
 753 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 754 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 755
 756 //=========================================================================
 757 // Called then the buffer is full (gcc 2.6.3)
 758 // or when "endl" is output (Borland 4.5)
 759 //=========================================================================
 760 // Class declaration using multiple inheritance doesn't work properly for
 761 // Borland. See note in textctrl.h.
 762 #ifndef NO_TEXT_WINDOW_STREAM
 763 int wxTextCtrl::overflow(int c)
 764 {
 765   // Make sure there is a holding area
 766   // this is not needed in <iostream> usage as it automagically allocates
 767   // it, but does someone want to emulate it for safety's sake?
 768 #if wxUSE_IOSTREAMH
 769   if ( allocate()==EOF )
 770   {
 771     wxLogError("Streambuf allocation failed");
 772     return EOF;
 773   }
 774 #endif
 775
 776   // Verify that there are no characters in get area
 777   if ( gptr() && gptr() < egptr() )
 778   {
 779      wxError("Who's trespassing my get area?","Internal error");
 780      return EOF;
 781   }
 782
 783   // Reset get area
 784   setg(0,0,0);
 785
 786   // Make sure there is a put area
 787   if ( ! pptr() )
 788   {
 789 /* This doesn't seem to be fatal so comment out error message */
 790 //    wxError("Put area not opened","Internal error");
 791
 792 #if wxUSE_IOSTREAMH
 793           setp( base(), base() );
 794 #else
 795           setp( pbase(), pbase() );
 796 #endif
 797   }
 798
 799   // Determine how many characters have been inserted but no consumed
 800   int plen = pptr() - pbase();
 801
 802   // Now Jerry relies on the fact that the buffer is at least 2 chars
 803   // long, but the holding area "may be as small as 1" ???
 804   // And we need an additional \0, so let's keep this inefficient but
 805   // safe copy.
 806
 807   // If c!=EOF, it is a character that must also be comsumed
 808   int xtra = c==EOF? 0 : 1;
 809
 810   // Write temporary C-string to wxTextWindow
 811   {
 812   char *txt = new char[plen+xtra+1];
 813   memcpy(txt, pbase(), plen);
 814   txt[plen] = (char)c;     // append c
 815   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 816     // If the put area already contained \0, output will be truncated there
 817   AppendText(txt);
 818     delete[] txt;
 819   }
 820
 821   // Reset put area
 822   setp(pbase(), epptr());
 823
 824 #if defined(__WATCOMC__)
 825   return __NOT_EOF;
 826 #elif defined(zapeof)     // HP-UX (all cfront based?)
 827   return zapeof(c);
 828 #else
 829   return c!=EOF ? c : 0;  // this should make everybody happy
 830 #endif
 831
 832 /* OLD CODE
 833   int len = pptr() - pbase();
 834   char *txt = new char[len+1];
 835   strncpy(txt, pbase(), len);
 836   txt[len] = '\0';
 837   (*this) << txt;
 838   setp(pbase(), epptr());
 839   delete[] txt;
 840   return EOF;
 841 */
 842 }
 843
 844 //=========================================================================
 845 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 846 //=========================================================================
 847 int wxTextCtrl::sync()
 848 {
 849   // Verify that there are no characters in get area
 850   if ( gptr() && gptr() < egptr() )
 851   {
 852      wxError("Who's trespassing my get area?","Internal error");
 853      return EOF;
 854   }
 855
 856   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 857
 858   return 0;
 859 /* OLD CODE
 860   int len = pptr() - pbase();
 861   char *txt = new char[len+1];
 862   strncpy(txt, pbase(), len);
 863   txt[len] = '\0';
 864   (*this) << txt;
 865   setp(pbase(), epptr());
 866   delete[] txt;
 867   return 0;
 868 */
 869 }
 870
 871 //=========================================================================
 872 // Should not be called by a "ostream". Used by a "istream"
 873 //=========================================================================
 874 int wxTextCtrl::underflow()
 875 {
 876   return EOF;
 877 }
 878 #endif
 879
 880 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 881 {
 882     AppendText(s);
 883     return *this;
 884 }
 885
 886 wxTextCtrl& wxTextCtrl::operator<<(float f)
 887 {
 888     wxString str;
 889     str.Printf("%.2f", f);
 890     AppendText(str);
 891     return *this;
 892 }
 893
 894 wxTextCtrl& wxTextCtrl::operator<<(double d)
 895 {
 896     wxString str;
 897     str.Printf("%.2f", d);
 898     AppendText(str);
 899     return *this;
 900 }
 901
 902 wxTextCtrl& wxTextCtrl::operator<<(int i)
 903 {
 904     wxString str;
 905     str.Printf("%d", i);
 906     AppendText(str);
 907     return *this;
 908 }
 909
 910 wxTextCtrl& wxTextCtrl::operator<<(long i)
 911 {
 912     wxString str;
 913     str.Printf("%ld", i);
 914     AppendText(str);
 915     return *this;
 916 }
 917
 918 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 919 {
 920     char buf[2];
 921
 922     buf[0] = c;
 923     buf[1] = 0;
 924     AppendText(buf);
 925     return *this;
 926 }
 927
 928 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 929       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 930 {
 931 #if wxUSE_CTL3D
 932   if ( m_useCtl3D )
 933   {
 934     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 935     return (WXHBRUSH) hbrush;
 936   }
 937 #endif
 938
 939   if (GetParent()->GetTransparentBackground())
 940     SetBkMode((HDC) pDC, TRANSPARENT);
 941   else
 942     SetBkMode((HDC) pDC, OPAQUE);
 943
 944   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 945   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 946
 947   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 948
 949   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 950   // has a zero usage count.
 951   // NOT NOW - will be cleaned up at end of app.
 952 //  backgroundBrush->RealizeResource();
 953   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 954 }
 955
 956 void wxTextCtrl::OnChar(wxKeyEvent& event)
 957 {
 958     switch( event.KeyCode() )
 959     {
 960         // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 961         case '{':
 962         case '}':
 963         case '[':
 964         case ']':
 965         case '|':
 966         case '~':
 967         case '\\':
 968             {
 969                 char c = (char)event.KeyCode();
 970                 *this << c;
 971             }
 972             break;
 973
 974         case WXK_RETURN:
 975             wxASSERT_MSG( m_windowStyle & wxTE_PROCESS_ENTER,
 976                           "this text ctrl should never receive return" );
 977             if ( m_windowStyle & wxTE_MULTILINE == 0 )
 978             {
 979                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 980                 event.SetEventObject( this );
 981                 if ( GetEventHandler()->ProcessEvent(event) )
 982                     return;
 983             }
 984             //else: multiline controls need Enter for themselves
 985
 986             break;
 987
 988         case WXK_TAB:
 989             // only produce navigation event if we don't process TAB ourself or
 990             // if it's a Shift-Tab keypress (we assume nobody will ever need
 991             // this key combo for himself)
 992             //
 993             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
 994             //     handled by Windows
 995             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
 996             {
 997                 wxNavigationKeyEvent eventNav;
 998                 eventNav.SetDirection(!event.ShiftDown());
 999                 eventNav.SetWindowChange(FALSE);
1000                 eventNav.SetEventObject(this);
1001
1002                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1003                     return;
1004             }
1005     }
1006
1007     // don't just call event.Skip() because this will cause TABs and ENTERs
1008     // be passed upwards and we don't always want this - instead process it
1009     // right here
1010     Default();
1011 }
1012
1013 long wxTextCtrl::MSWGetDlgCode()
1014 {
1015     // we always want the characters and the arrows
1016     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1017
1018     // we may have several different cases:
1019     // 1. normal case: both TAB and ENTER are used for dialog navigation
1020     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1021     //    control in the dialog
1022     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1023     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1024     //    the next control
1025     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1026         lRc |= DLGC_WANTMESSAGE;
1027     if ( m_windowStyle & wxTE_PROCESS_TAB )
1028         lRc |= DLGC_WANTTAB;
1029
1030     return lRc;
1031 }
1032
1033 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1034 {
1035     if ( m_windowStyle & wxTE_MULTILINE )
1036     {
1037         // No flicker - only problem is we probably can't change the background
1038         Default();
1039 /*
1040         RECT rect;
1041         ::GetClientRect((HWND) GetHWND(), &rect);
1042
1043         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1044         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1045
1046         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1047         ::DeleteObject(hBrush);
1048         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1049 */
1050     }
1051 //        wxWindow::OnEraseBackground(event);
1052 }
1053
1054 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1055 {
1056 /*
1057   // Debugging
1058   wxDebugMsg("Edit control %d: ", (int)id);
1059   switch (param)
1060   {
1061     case EN_SETFOCUS:
1062       wxDebugMsg("EN_SETFOCUS\n");
1063       break;
1064     case EN_KILLFOCUS:
1065       wxDebugMsg("EN_KILLFOCUS\n");
1066       break;
1067     case EN_CHANGE:
1068       wxDebugMsg("EN_CHANGE\n");
1069       break;
1070     case EN_UPDATE:
1071       wxDebugMsg("EN_UPDATE\n");
1072       break;
1073     case EN_ERRSPACE:
1074       wxDebugMsg("EN_ERRSPACE\n");
1075       break;
1076     case EN_MAXTEXT:
1077       wxDebugMsg("EN_MAXTEXT\n");
1078       break;
1079     case EN_HSCROLL:
1080       wxDebugMsg("EN_HSCROLL\n");
1081       break;
1082     case EN_VSCROLL:
1083       wxDebugMsg("EN_VSCROLL\n");
1084       break;
1085     default:
1086       wxDebugMsg("Unknown EDIT notification\n");
1087       break;
1088   }
1089 */
1090   switch (param)
1091   {
1092     case EN_SETFOCUS:
1093     case EN_KILLFOCUS:
1094       {
1095         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1096                                                  : wxEVT_SET_FOCUS,
1097                            m_windowId);
1098         event.SetEventObject( this );
1099         GetEventHandler()->ProcessEvent(event);
1100       }
1101       break;
1102
1103     case EN_CHANGE:
1104       {
1105         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1106         wxString val(GetValue());
1107         if ( !val.IsNull() )
1108           event.m_commandString = WXSTRINGCAST val;
1109         event.SetEventObject( this );
1110         ProcessCommand(event);
1111       }
1112       break;
1113
1114     // the other notification messages are not processed
1115     case EN_UPDATE:
1116     case EN_ERRSPACE:
1117     case EN_MAXTEXT:
1118     case EN_HSCROLL:
1119     case EN_VSCROLL:
1120     default:
1121       return FALSE;
1122   }
1123
1124   // processed
1125   return TRUE;
1126 }
1127
1128
1129 // For Rich Edit controls. Do we need it?
1130 #if 0
1131 #if wxUSE_RICHEDIT
1132 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1133 {
1134   wxCommandEvent event(0, m_windowId);
1135   int eventType = 0;
1136   NMHDR *hdr1 = (NMHDR *) lParam;
1137   switch ( hdr1->code )
1138   {
1139     // Insert case code here
1140     default :
1141       return wxControl::MSWNotify(wParam, lParam);
1142       break;
1143   }
1144
1145   event.SetEventObject( this );
1146   event.SetEventType(eventType);
1147
1148   if ( !GetEventHandler()->ProcessEvent(event) )
1149     return FALSE;
1150
1151     return TRUE;
1152 }
1153 #endif
1154 #endif
1155