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 #  ifdef _MSC_VER
  46       using namespace std;
  47 #  endif
  48 #endif
  49
  50 #include <sys/types.h>
  51 #ifndef __MWERKS__
  52 #include <sys/stat.h>
  53 #else
  54 #include <stat.h>
  55 #endif
  56 #if defined(__BORLANDC__) && !defined(__WIN32__)
  57 #include <alloc.h>
  58 #else
  59 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
  60 #include <malloc.h>
  61 #endif
  62 #define farmalloc malloc
  63 #define farfree free
  64 #endif
  65 #include <windowsx.h>
  66
  67 #include <string.h>
  68
  69 #if wxUSE_RICHEDIT && !defined(__GNUWIN32__)
  70     #include <richedit.h>
  71 #endif
  72
  73 #if !USE_SHARED_LIBRARY
  74 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  75
  76 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  77   EVT_CHAR(wxTextCtrl::OnChar)
  78   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  79   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  80 END_EVENT_TABLE()
  81 #endif // USE_SHARED_LIBRARY
  82
  83 // Text item
  84 wxTextCtrl::wxTextCtrl()
  85 #ifndef NO_TEXT_WINDOW_STREAM
  86           : streambuf()
  87 #endif
  88 {
  89 #if wxUSE_RICHEDIT
  90   m_isRich = FALSE;
  91 #endif
  92 }
  93
  94 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  95                         const wxString& value,
  96                         const wxPoint& pos,
  97                         const wxSize& size, long style,
  98                         const wxValidator& validator,
  99                         const wxString& name)
 100 {
 101   m_fileName = "";
 102   SetName(name);
 103   SetValidator(validator);
 104   if (parent) parent->AddChild(this);
 105
 106   m_windowStyle = style;
 107
 108   // Should this be taken from the system colours?
 109 //  SetBackgroundColour(wxColour(255, 255, 255));
 110
 111   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 112
 113   SetForegroundColour(parent->GetForegroundColour()) ;
 114
 115   if ( id == -1 )
 116     m_windowId = (int)NewControlId();
 117   else
 118   m_windowId = id;
 119
 120   int x = pos.x;
 121   int y = pos.y;
 122   int width = size.x;
 123   int height = size.y;
 124
 125   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 126   if (m_windowStyle & wxTE_MULTILINE)
 127   {
 128     wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 129                   "wxTE_PROCESS_ENTER style is ignored for multiline controls" );
 130
 131     msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 132     m_windowStyle |= wxTE_PROCESS_ENTER;
 133   }
 134   else
 135     msStyle |= ES_AUTOHSCROLL ;
 136
 137   if (m_windowStyle & wxTE_READONLY)
 138     msStyle |= ES_READONLY;
 139
 140   if (m_windowStyle & wxHSCROLL)
 141     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 142   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 143     msStyle |= ES_PASSWORD;
 144
 145   const char *windowClass = "EDIT";
 146
 147 #if wxUSE_RICHEDIT
 148   if ( m_windowStyle & wxTE_MULTILINE )
 149   {
 150     msStyle |= ES_AUTOVSCROLL;
 151     m_isRich = TRUE;
 152     windowClass = "RichEdit" ;
 153   }
 154   else
 155     m_isRich = FALSE;
 156 #endif
 157
 158   bool want3D;
 159   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 160
 161   // If we're in Win95, and we want a simple 2D border,
 162   // then make it an EDIT control instead.
 163 #if wxUSE_RICHEDIT
 164   if (m_windowStyle & wxSIMPLE_BORDER)
 165   {
 166     windowClass = "EDIT";
 167     m_isRich = FALSE;
 168   }
 169 #endif
 170
 171   // Even with extended styles, need to combine with WS_BORDER
 172   // for them to look right.
 173   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 174     msStyle |= WS_BORDER;
 175
 176   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 177                         msStyle,
 178                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 179                         wxGetInstance(), NULL);
 180
 181   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 182
 183 #if wxUSE_CTL3D
 184   if ( want3D )
 185   {
 186     Ctl3dSubclassCtl((HWND)m_hWnd);
 187     m_useCtl3D = TRUE;
 188   }
 189 #endif
 190
 191 #if wxUSE_RICHEDIT
 192   if (m_isRich)
 193   {
 194     // Have to enable events
 195     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 196                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 197   }
 198 #endif
 199
 200   SubclassWin(GetHWND());
 201
 202   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 203   {
 204     SetFont(parent->GetFont());
 205   }
 206   else
 207   {
 208     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 209   }
 210
 211   SetSize(x, y, width, height);
 212
 213   // Causes a crash for Symantec C++ and WIN32 for some reason
 214 #if !(defined(__SC__) && defined(__WIN32__))
 215   if ( !value.IsEmpty() )
 216   {
 217     SetValue(value);
 218   }
 219 #endif
 220
 221   return TRUE;
 222 }
 223
 224 // Make sure the window style (etc.) reflects the HWND style (roughly)
 225 void wxTextCtrl::AdoptAttributesFromHWND()
 226 {
 227   wxWindow::AdoptAttributesFromHWND();
 228
 229   HWND hWnd = (HWND) GetHWND();
 230   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 231
 232   // retrieve the style to see whether this is an edit or richedit ctrl
 233 #if wxUSE_RICHEDIT
 234   char buf[256];
 235
 236 #ifndef __WIN32__
 237   GetClassName((HWND) hWnd, buf, 256);
 238 #else
 239 #ifdef UNICODE
 240   GetClassNameW((HWND) hWnd, buf, 256);
 241 #else
 242 #ifdef __TWIN32__
 243   GetClassName((HWND) hWnd, buf, 256);
 244 #else
 245   GetClassNameA((HWND) hWnd, buf, 256);
 246 #endif
 247 #endif
 248 #endif
 249
 250   wxString str(buf);
 251   str.UpperCase();
 252
 253   if (str == "EDIT")
 254     m_isRich = FALSE;
 255   else
 256     m_isRich = TRUE;
 257 #endif
 258
 259   if (style & ES_MULTILINE)
 260     m_windowStyle |= wxTE_MULTILINE;
 261   if (style & ES_PASSWORD)
 262     m_windowStyle |= wxTE_PASSWORD;
 263   if (style & ES_READONLY)
 264     m_windowStyle |= wxTE_READONLY;
 265   if (style & ES_WANTRETURN)
 266     m_windowStyle |= wxTE_PROCESS_ENTER;
 267 }
 268
 269 void wxTextCtrl::SetupColours()
 270 {
 271   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 272   SetForegroundColour(GetParent()->GetForegroundColour());
 273 }
 274
 275 wxString wxTextCtrl::GetValue() const
 276 {
 277     int length = GetWindowTextLength((HWND) GetHWND());
 278     char *s = new char[length+1];
 279     GetWindowText((HWND) GetHWND(), s, length+1);
 280     wxString str(s);
 281     delete[] s;
 282   return str;
 283 }
 284
 285 void wxTextCtrl::SetValue(const wxString& value)
 286 {
 287   // If newlines are denoted by just 10, must stick 13 in front.
 288   int singletons = 0;
 289   int len = value.Length();
 290   int i;
 291   for (i = 0; i < len; i ++)
 292   {
 293     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 294       singletons ++;
 295   }
 296   if (singletons > 0)
 297   {
 298     char *tmp = new char[len + singletons + 1];
 299     int j = 0;
 300     for (i = 0; i < len; i ++)
 301     {
 302       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 303       {
 304         tmp[j] = 13;
 305         j ++;
 306       }
 307       tmp[j] = value[i];
 308       j ++;
 309     }
 310     tmp[j] = 0;
 311     SetWindowText((HWND) GetHWND(), tmp);
 312     delete[] tmp;
 313   }
 314   else
 315     SetWindowText((HWND) GetHWND(), (const char *)value);
 316 }
 317
 318 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 319 {
 320   int currentX, currentY;
 321   GetPosition(&currentX, &currentY);
 322   int x1 = x;
 323   int y1 = y;
 324   int w1 = width;
 325   int h1 = height;
 326
 327   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 328     x1 = currentX;
 329   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 330     y1 = currentY;
 331
 332   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 333
 334   int cx; // button font dimensions
 335   int cy;
 336
 337   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 338
 339   int control_width, control_height, control_x, control_y;
 340
 341   // If we're prepared to use the existing size, then...
 342   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 343   {
 344     GetSize(&w1, &h1);
 345   }
 346
 347   // Deal with default size (using -1 values)
 348   if (w1<=0)
 349     w1 = DEFAULT_ITEM_WIDTH;
 350
 351   control_x = x1;
 352   control_y = y1;
 353   control_width = w1;
 354   control_height = h1;
 355
 356   // Calculations may have made text size too small
 357   if (control_height <= 0)
 358     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 359
 360   if (control_width <= 0)
 361     control_width = DEFAULT_ITEM_WIDTH;
 362
 363   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 364                               (int)control_width, (int)control_height, TRUE);
 365 }
 366
 367 // Clipboard operations
 368 void wxTextCtrl::Copy()
 369 {
 370   HWND hWnd = (HWND) GetHWND();
 371   SendMessage(hWnd, WM_COPY, 0, 0L);
 372 }
 373
 374 void wxTextCtrl::Cut()
 375 {
 376   HWND hWnd = (HWND) GetHWND();
 377   SendMessage(hWnd, WM_CUT, 0, 0L);
 378 }
 379
 380 void wxTextCtrl::Paste()
 381 {
 382   HWND hWnd = (HWND) GetHWND();
 383   SendMessage(hWnd, WM_PASTE, 0, 0L);
 384 }
 385
 386 void wxTextCtrl::SetEditable(bool editable)
 387 {
 388   HWND hWnd = (HWND) GetHWND();
 389   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 390 }
 391
 392 void wxTextCtrl::SetInsertionPoint(long pos)
 393 {
 394   HWND hWnd = (HWND) GetHWND();
 395 #ifdef __WIN32__
 396 #if wxUSE_RICHEDIT
 397   if ( m_isRich)
 398   {
 399     CHARRANGE range;
 400     range.cpMin = pos;
 401     range.cpMax = pos;
 402     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 403     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 404   }
 405   else
 406 #endif
 407   {
 408     SendMessage(hWnd, EM_SETSEL, pos, pos);
 409     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 410   }
 411 #else
 412   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 413 #endif
 414   char *nothing = "";
 415   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 416 }
 417
 418 void wxTextCtrl::SetInsertionPointEnd()
 419 {
 420   long pos = GetLastPosition();
 421   SetInsertionPoint(pos);
 422 }
 423
 424 long wxTextCtrl::GetInsertionPoint() const
 425 {
 426 #if wxUSE_RICHEDIT
 427   if (m_isRich)
 428   {
 429     CHARRANGE range;
 430     range.cpMin = 0;
 431     range.cpMax = 0;
 432     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 433     return range.cpMin;
 434   }
 435 #endif
 436
 437   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 438   return Pos&0xFFFF;
 439 }
 440
 441 long wxTextCtrl::GetLastPosition() const
 442 {
 443     HWND hWnd = (HWND) GetHWND();
 444
 445     // Will always return a number > 0 (according to docs)
 446     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 447
 448     // This gets the char index for the _beginning_ of the last line
 449     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 450
 451     // Get number of characters in the last line. We'll add this to the character
 452     // index for the last line, 1st position.
 453     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 454
 455     return (long)(charIndex + lineLength);
 456 }
 457
 458 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 459 {
 460     HWND hWnd = (HWND) GetHWND();
 461     long fromChar = from;
 462     long toChar = to;
 463
 464     // Set selection and remove it
 465 #ifdef __WIN32__
 466     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 467 #else
 468     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 469 #endif
 470     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 471
 472     // Now replace with 'value', by pasting.
 473     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 474
 475     // Paste into edit control
 476     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 477 }
 478
 479 void wxTextCtrl::Remove(long from, long to)
 480 {
 481     HWND hWnd = (HWND) GetHWND();
 482     long fromChar = from;
 483     long toChar = to;
 484
 485     // Cut all selected text
 486 #ifdef __WIN32__
 487     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 488 #else
 489     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 490 #endif
 491     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 492 }
 493
 494 void wxTextCtrl::SetSelection(long from, long to)
 495 {
 496     HWND hWnd = (HWND) GetHWND();
 497     long fromChar = from;
 498     long toChar = to;
 499     // if from and to are both -1, it means
 500     // (in wxWindows) that all text should be selected.
 501     // This translates into Windows convention
 502     if ((from == -1) && (to == -1))
 503     {
 504       fromChar = 0;
 505       toChar = -1;
 506     }
 507
 508 #ifdef __WIN32__
 509     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 510     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 511 #else
 512     // WPARAM is 0: selection is scrolled into view
 513     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 514 #endif
 515 }
 516
 517 bool wxTextCtrl::LoadFile(const wxString& file)
 518 {
 519   if (!wxFileExists(WXSTRINGCAST file))
 520     return FALSE;
 521
 522   m_fileName = file;
 523
 524   Clear();
 525
 526 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 527   ifstream input(WXSTRINGCAST file, ios::in);
 528
 529   if (!input.bad())
 530   {
 531       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 532       // line by line into the control. Apart from being very slow this
 533       // was limited to 32K of text by the external interface presenting
 534       // positions as signed shorts. Now load in one chunk...
 535       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 536
 537 #ifdef __SALFORDC__
 538       struct _stat stat_buf;
 539       if (stat((char*) (const char*) file, &stat_buf) < 0)
 540         return FALSE;
 541 #else
 542       struct stat stat_buf;
 543       if (stat(file, &stat_buf) < 0)
 544         return FALSE;
 545 #endif
 546
 547 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 548       // This may need to be a bigger buffer than the file size suggests,
 549       // if it's a UNIX file. Give it an extra 1000 just in case.
 550       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 551       long no_lines = 0;
 552       long pos = 0;
 553       while (!input.eof() && input.peek() != EOF)
 554       {
 555         input.getline(wxBuffer, 500);
 556   int len = strlen(wxBuffer);
 557   wxBuffer[len] = 13;
 558   wxBuffer[len+1] = 10;
 559   wxBuffer[len+2] = 0;
 560   strcpy(tmp_buffer+pos, wxBuffer);
 561   pos += strlen(wxBuffer);
 562   no_lines++;
 563       }
 564
 565 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 566       SetWindowText((HWND) GetHWND(), tmp_buffer);
 567       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 568       farfree(tmp_buffer);
 569
 570       return TRUE;
 571   }
 572   return FALSE;
 573 }
 574
 575 // If file is null, try saved file name first
 576 // Returns TRUE if succeeds.
 577 bool wxTextCtrl::SaveFile(const wxString& file)
 578 {
 579     wxString theFile(file);
 580
 581     if (theFile == "")
 582         theFile = m_fileName;
 583
 584     if (theFile == "")
 585         return FALSE;
 586
 587     m_fileName = theFile;
 588
 589     ofstream output((char*) (const char*) theFile);
 590     if (output.bad())
 591         return FALSE;
 592
 593     // This will only save 64K max
 594     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 595     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 596     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 597     char *pstr = tmp_buffer;
 598
 599     // Convert \r\n to just \n
 600     while (*pstr)
 601     {
 602       if (*pstr != '\r')
 603         output << *pstr;
 604       pstr++;
 605     }
 606
 607     farfree(tmp_buffer);
 608     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 609
 610     return TRUE;
 611 }
 612
 613 void wxTextCtrl::WriteText(const wxString& text)
 614 {
 615     // Covert \n to \r\n
 616     int len = text.Length();
 617     char *newtext = new char[(len*2)+1];
 618     int i = 0;
 619     int j = 0;
 620     while (i < len)
 621     {
 622       if (text[i] == '\n')
 623       {
 624         newtext[j] = '\r';
 625         j ++;
 626       }
 627       newtext[j] = text[i];
 628       i ++;
 629       j ++;
 630     }
 631     newtext[j] = 0;
 632     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 633     delete[] newtext;
 634 }
 635
 636 void wxTextCtrl::AppendText(const wxString& text)
 637 {
 638     SetInsertionPointEnd();
 639     WriteText(text);
 640 }
 641
 642 void wxTextCtrl::Clear()
 643 {
 644     SetWindowText((HWND) GetHWND(), "");
 645 }
 646
 647 bool wxTextCtrl::IsModified() const
 648 {
 649     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 650 }
 651
 652 // Makes 'unmodified'
 653 void wxTextCtrl::DiscardEdits()
 654 {
 655   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 656 }
 657
 658 /*
 659  * Some of the following functions are yet to be implemented
 660  *
 661  */
 662
 663 int wxTextCtrl::GetNumberOfLines() const
 664 {
 665     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 666 }
 667
 668 long wxTextCtrl::XYToPosition(long x, long y) const
 669 {
 670     HWND hWnd = (HWND) GetHWND();
 671
 672     // This gets the char index for the _beginning_ of this line
 673     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 674     return (long)(x + charIndex);
 675 }
 676
 677 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 678 {
 679     HWND hWnd = (HWND) GetHWND();
 680
 681     // This gets the line number containing the character
 682     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 683     // This gets the char index for the _beginning_ of this line
 684     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 685     // The X position must therefore be the different between pos and charIndex
 686     *x = (long)(pos - charIndex);
 687     *y = (long)lineNo;
 688 }
 689
 690 void wxTextCtrl::ShowPosition(long pos)
 691 {
 692     HWND hWnd = (HWND) GetHWND();
 693
 694     // To scroll to a position, we pass the number of lines and characters
 695     // to scroll *by*. This means that we need to:
 696     // (1) Find the line position of the current line.
 697     // (2) Find the line position of pos.
 698     // (3) Scroll by (pos - current).
 699     // For now, ignore the horizontal scrolling.
 700
 701     // Is this where scrolling is relative to - the line containing the caret?
 702     // Or is the first visible line??? Try first visible line.
 703 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 704
 705     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 706
 707     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 708
 709     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 710
 711 /*
 712     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 713       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 714 */
 715
 716     if (linesToScroll != 0)
 717       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 718 }
 719
 720 int wxTextCtrl::GetLineLength(long lineNo) const
 721 {
 722     long charIndex = XYToPosition(0, lineNo);
 723     HWND hWnd = (HWND) GetHWND();
 724     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 725     return len;
 726 }
 727
 728 wxString wxTextCtrl::GetLineText(long lineNo) const
 729 {
 730     HWND hWnd = (HWND) GetHWND();
 731     *(WORD *)wxBuffer = 512;
 732     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 733     wxBuffer[noChars] = 0;
 734   return wxString(wxBuffer);
 735 }
 736
 737 /*
 738  * Text item
 739  */
 740
 741 void wxTextCtrl::Command(wxCommandEvent & event)
 742 {
 743   SetValue (event.GetString());
 744   ProcessCommand (event);
 745 }
 746
 747 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 748 {
 749   // By default, load the first file into the text window.
 750   if (event.GetNumberOfFiles() > 0)
 751   {
 752     LoadFile(event.GetFiles()[0]);
 753   }
 754 }
 755
 756 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 757 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 758
 759 //=========================================================================
 760 // Called then the buffer is full (gcc 2.6.3)
 761 // or when "endl" is output (Borland 4.5)
 762 //=========================================================================
 763 // Class declaration using multiple inheritance doesn't work properly for
 764 // Borland. See note in textctrl.h.
 765 #ifndef NO_TEXT_WINDOW_STREAM
 766 int wxTextCtrl::overflow(int c)
 767 {
 768   // Make sure there is a holding area
 769   // this is not needed in <iostream> usage as it automagically allocates
 770   // it, but does someone want to emulate it for safety's sake?
 771 #if wxUSE_IOSTREAMH
 772   if ( allocate()==EOF )
 773   {
 774     wxLogError("Streambuf allocation failed");
 775     return EOF;
 776   }
 777 #endif
 778
 779   // Verify that there are no characters in get area
 780   if ( gptr() && gptr() < egptr() )
 781   {
 782      wxError("Who's trespassing my get area?","Internal error");
 783      return EOF;
 784   }
 785
 786   // Reset get area
 787   setg(0,0,0);
 788
 789   // Make sure there is a put area
 790   if ( ! pptr() )
 791   {
 792 /* This doesn't seem to be fatal so comment out error message */
 793 //    wxError("Put area not opened","Internal error");
 794
 795 #if wxUSE_IOSTREAMH
 796           setp( base(), base() );
 797 #else
 798           setp( pbase(), pbase() );
 799 #endif
 800   }
 801
 802   // Determine how many characters have been inserted but no consumed
 803   int plen = pptr() - pbase();
 804
 805   // Now Jerry relies on the fact that the buffer is at least 2 chars
 806   // long, but the holding area "may be as small as 1" ???
 807   // And we need an additional \0, so let's keep this inefficient but
 808   // safe copy.
 809
 810   // If c!=EOF, it is a character that must also be comsumed
 811   int xtra = c==EOF? 0 : 1;
 812
 813   // Write temporary C-string to wxTextWindow
 814   {
 815   char *txt = new char[plen+xtra+1];
 816   memcpy(txt, pbase(), plen);
 817   txt[plen] = (char)c;     // append c
 818   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 819     // If the put area already contained \0, output will be truncated there
 820   AppendText(txt);
 821     delete[] txt;
 822   }
 823
 824   // Reset put area
 825   setp(pbase(), epptr());
 826
 827 #if defined(__WATCOMC__)
 828   return __NOT_EOF;
 829 #elif defined(zapeof)     // HP-UX (all cfront based?)
 830   return zapeof(c);
 831 #else
 832   return c!=EOF ? c : 0;  // this should make everybody happy
 833 #endif
 834
 835 /* OLD CODE
 836   int len = pptr() - pbase();
 837   char *txt = new char[len+1];
 838   strncpy(txt, pbase(), len);
 839   txt[len] = '\0';
 840   (*this) << txt;
 841   setp(pbase(), epptr());
 842   delete[] txt;
 843   return EOF;
 844 */
 845 }
 846
 847 //=========================================================================
 848 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 849 //=========================================================================
 850 int wxTextCtrl::sync()
 851 {
 852   // Verify that there are no characters in get area
 853   if ( gptr() && gptr() < egptr() )
 854   {
 855      wxError("Who's trespassing my get area?","Internal error");
 856      return EOF;
 857   }
 858
 859   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 860
 861   return 0;
 862 /* OLD CODE
 863   int len = pptr() - pbase();
 864   char *txt = new char[len+1];
 865   strncpy(txt, pbase(), len);
 866   txt[len] = '\0';
 867   (*this) << txt;
 868   setp(pbase(), epptr());
 869   delete[] txt;
 870   return 0;
 871 */
 872 }
 873
 874 //=========================================================================
 875 // Should not be called by a "ostream". Used by a "istream"
 876 //=========================================================================
 877 int wxTextCtrl::underflow()
 878 {
 879   return EOF;
 880 }
 881 #endif
 882
 883 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 884 {
 885     AppendText(s);
 886     return *this;
 887 }
 888
 889 wxTextCtrl& wxTextCtrl::operator<<(float f)
 890 {
 891     wxString str;
 892     str.Printf("%.2f", f);
 893     AppendText(str);
 894     return *this;
 895 }
 896
 897 wxTextCtrl& wxTextCtrl::operator<<(double d)
 898 {
 899     wxString str;
 900     str.Printf("%.2f", d);
 901     AppendText(str);
 902     return *this;
 903 }
 904
 905 wxTextCtrl& wxTextCtrl::operator<<(int i)
 906 {
 907     wxString str;
 908     str.Printf("%d", i);
 909     AppendText(str);
 910     return *this;
 911 }
 912
 913 wxTextCtrl& wxTextCtrl::operator<<(long i)
 914 {
 915     wxString str;
 916     str.Printf("%ld", i);
 917     AppendText(str);
 918     return *this;
 919 }
 920
 921 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 922 {
 923     char buf[2];
 924
 925     buf[0] = c;
 926     buf[1] = 0;
 927     AppendText(buf);
 928     return *this;
 929 }
 930
 931 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 932       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 933 {
 934 #if wxUSE_CTL3D
 935   if ( m_useCtl3D )
 936   {
 937     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 938     return (WXHBRUSH) hbrush;
 939   }
 940 #endif
 941
 942   if (GetParent()->GetTransparentBackground())
 943     SetBkMode((HDC) pDC, TRANSPARENT);
 944   else
 945     SetBkMode((HDC) pDC, OPAQUE);
 946
 947   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 948   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 949
 950   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 951
 952   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 953   // has a zero usage count.
 954   // NOT NOW - will be cleaned up at end of app.
 955 //  backgroundBrush->RealizeResource();
 956   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 957 }
 958
 959 void wxTextCtrl::OnChar(wxKeyEvent& event)
 960 {
 961     switch( event.KeyCode() )
 962     {
 963         // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 964         case '{':
 965         case '}':
 966         case '[':
 967         case ']':
 968         case '|':
 969         case '~':
 970         case '\\':
 971             {
 972                 char c = (char)event.KeyCode();
 973                 *this << c;
 974             }
 975             break;
 976
 977         case WXK_RETURN:
 978             wxASSERT_MSG( m_windowStyle & wxTE_PROCESS_ENTER,
 979                           "this text ctrl should never receive return" );
 980             if ( m_windowStyle & wxTE_MULTILINE == 0 )
 981             {
 982                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 983                 event.SetEventObject( this );
 984                 if ( GetEventHandler()->ProcessEvent(event) )
 985                     return;
 986             }
 987             //else: multiline controls need Enter for themselves
 988
 989             break;
 990
 991         case WXK_TAB:
 992             // only produce navigation event if we don't process TAB ourself or
 993             // if it's a Shift-Tab keypress (we assume nobody will ever need
 994             // this key combo for himself)
 995             //
 996             // NB: Notice that Ctrl-Tab is handled elsewhere and Alt-Tab is
 997             //     handled by Windows
 998             if ( event.ShiftDown() || !(m_windowStyle & wxTE_PROCESS_TAB) )
 999             {
1000                 wxNavigationKeyEvent eventNav;
1001                 eventNav.SetDirection(!event.ShiftDown());
1002                 eventNav.SetWindowChange(FALSE);
1003                 eventNav.SetEventObject(this);
1004
1005                 if ( GetEventHandler()->ProcessEvent(eventNav) )
1006                     return;
1007             }
1008     }
1009
1010     // don't just call event.Skip() because this will cause TABs and ENTERs
1011     // be passed upwards and we don't always want this - instead process it
1012     // right here
1013     Default();
1014 }
1015
1016 long wxTextCtrl::MSWGetDlgCode()
1017 {
1018     // we always want the characters and the arrows
1019     long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1020
1021     // we may have several different cases:
1022     // 1. normal case: both TAB and ENTER are used for dialog navigation
1023     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
1024     //    control in the dialog
1025     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
1026     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
1027     //    the next control
1028     if ( m_windowStyle & wxTE_PROCESS_ENTER )
1029         lRc |= DLGC_WANTMESSAGE;
1030     if ( m_windowStyle & wxTE_PROCESS_TAB )
1031         lRc |= DLGC_WANTTAB;
1032
1033     return lRc;
1034 }
1035
1036 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1037 {
1038     if ( m_windowStyle & wxTE_MULTILINE )
1039     {
1040         // No flicker - only problem is we probably can't change the background
1041         Default();
1042 /*
1043         RECT rect;
1044         ::GetClientRect((HWND) GetHWND(), &rect);
1045
1046         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1047         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1048
1049         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1050         ::DeleteObject(hBrush);
1051         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1052 */
1053     }
1054 //        wxWindow::OnEraseBackground(event);
1055 }
1056
1057 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1058 {
1059 /*
1060   // Debugging
1061   wxDebugMsg("Edit control %d: ", (int)id);
1062   switch (param)
1063   {
1064     case EN_SETFOCUS:
1065       wxDebugMsg("EN_SETFOCUS\n");
1066       break;
1067     case EN_KILLFOCUS:
1068       wxDebugMsg("EN_KILLFOCUS\n");
1069       break;
1070     case EN_CHANGE:
1071       wxDebugMsg("EN_CHANGE\n");
1072       break;
1073     case EN_UPDATE:
1074       wxDebugMsg("EN_UPDATE\n");
1075       break;
1076     case EN_ERRSPACE:
1077       wxDebugMsg("EN_ERRSPACE\n");
1078       break;
1079     case EN_MAXTEXT:
1080       wxDebugMsg("EN_MAXTEXT\n");
1081       break;
1082     case EN_HSCROLL:
1083       wxDebugMsg("EN_HSCROLL\n");
1084       break;
1085     case EN_VSCROLL:
1086       wxDebugMsg("EN_VSCROLL\n");
1087       break;
1088     default:
1089       wxDebugMsg("Unknown EDIT notification\n");
1090       break;
1091   }
1092 */
1093   switch (param)
1094   {
1095     case EN_SETFOCUS:
1096     case EN_KILLFOCUS:
1097       {
1098         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1099                                                  : wxEVT_SET_FOCUS,
1100                            m_windowId);
1101         event.SetEventObject( this );
1102         GetEventHandler()->ProcessEvent(event);
1103       }
1104       break;
1105
1106     case EN_CHANGE:
1107       {
1108         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1109         wxString val(GetValue());
1110         if ( !val.IsNull() )
1111           event.m_commandString = WXSTRINGCAST val;
1112         event.SetEventObject( this );
1113         ProcessCommand(event);
1114       }
1115       break;
1116
1117     // the other notification messages are not processed
1118     case EN_UPDATE:
1119     case EN_ERRSPACE:
1120     case EN_MAXTEXT:
1121     case EN_HSCROLL:
1122     case EN_VSCROLL:
1123     default:
1124       return FALSE;
1125   }
1126
1127   // processed
1128   return TRUE;
1129 }
1130
1131
1132 // For Rich Edit controls. Do we need it?
1133 #if 0
1134 #if wxUSE_RICHEDIT
1135 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1136 {
1137   wxCommandEvent event(0, m_windowId);
1138   int eventType = 0;
1139   NMHDR *hdr1 = (NMHDR *) lParam;
1140   switch ( hdr1->code )
1141   {
1142     // Insert case code here
1143     default :
1144       return wxControl::MSWNotify(wParam, lParam);
1145       break;
1146   }
1147
1148   event.SetEventObject( this );
1149   event.SetEventType(eventType);
1150
1151   if ( !GetEventHandler()->ProcessEvent(event) )
1152     return FALSE;
1153
1154     return TRUE;
1155 }
1156 #endif
1157 #endif
1158