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 defined(__WIN95__) && !defined(__TWIN32__)
  70 #define wxUSE_RICHEDIT 1
  71 #else
  72 #define wxUSE_RICHEDIT 0
  73 #endif
  74
  75 #if wxUSE_RICHEDIT && !defined(__GNUWIN32__)
  76 #include <richedit.h>
  77 #endif
  78
  79 #if !USE_SHARED_LIBRARY
  80 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  81
  82 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  83   EVT_CHAR(wxTextCtrl::OnChar)
  84   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  85   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  86 END_EVENT_TABLE()
  87
  88 #endif
  89
  90 // Text item
  91 wxTextCtrl::wxTextCtrl(void)
  92 #ifndef NO_TEXT_WINDOW_STREAM
  93  :streambuf()
  94 #endif
  95 {
  96   m_fileName = "";
  97   m_isRich = FALSE;
  98 }
  99
 100 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 101                         const wxString& value,
 102                         const wxPoint& pos,
 103                         const wxSize& size, long style,
 104                         const wxValidator& validator,
 105                         const wxString& name)
 106 {
 107   m_fileName = "";
 108   SetName(name);
 109   SetValidator(validator);
 110   if (parent) parent->AddChild(this);
 111
 112   m_windowStyle = style;
 113
 114   // Should this be taken from the system colours?
 115 //  SetBackgroundColour(wxColour(255, 255, 255));
 116
 117   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 118
 119   SetForegroundColour(parent->GetForegroundColour()) ;
 120
 121   if ( id == -1 )
 122     m_windowId = (int)NewControlId();
 123   else
 124   m_windowId = id;
 125
 126   int x = pos.x;
 127   int y = pos.y;
 128   int width = size.x;
 129   int height = size.y;
 130
 131 #ifdef __WIN32__
 132   WXHGLOBAL m_globalHandle = 0;
 133 #else
 134   // Obscure method from the MS Developer's Network Disk for
 135   // using global memory instead of the local heap, which
 136   // runs out far too soon. Solves the problem with
 137   // failing to appear.
 138
 139   // Doesn't seem to work for Win95, so removing.
 140   m_globalHandle=0;
 141 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 142 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 143 //                         256L);
 144 #endif
 145
 146   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 147   if (m_windowStyle & wxTE_MULTILINE)
 148   msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 149   else
 150     msStyle |= ES_AUTOHSCROLL ;
 151
 152   if (m_windowStyle & wxTE_READONLY)
 153     msStyle |= ES_READONLY;
 154
 155   if (m_windowStyle & wxHSCROLL)
 156     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 157   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 158     msStyle |= ES_PASSWORD;
 159
 160   char *windowClass = "EDIT";
 161 #if wxUSE_RICHEDIT
 162   if ( m_windowStyle & wxTE_MULTILINE )
 163   {
 164     msStyle |= ES_AUTOVSCROLL;
 165     m_isRich = TRUE;
 166     windowClass = "RichEdit" ;
 167   }
 168   else
 169 #endif
 170     m_isRich = FALSE;
 171
 172   bool want3D;
 173   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 174
 175   // If we're in Win95, and we want a simple 2D border,
 176   // then make it an EDIT control instead.
 177 #if wxUSE_RICHEDIT
 178   if (m_windowStyle & wxSIMPLE_BORDER)
 179   {
 180     windowClass = "EDIT";
 181   m_isRich = FALSE;
 182   }
 183 #endif
 184
 185   // Even with extended styles, need to combine with WS_BORDER
 186   // for them to look right.
 187   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 188     msStyle |= WS_BORDER;
 189
 190   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, windowClass, NULL,
 191                         msStyle,
 192                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 193                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 194
 195   wxCHECK_MSG( m_hWnd, FALSE, "Failed to create text ctrl" );
 196
 197 #if CTL3D
 198   if ( want3D )
 199   {
 200     Ctl3dSubclassCtl((HWND)m_hWnd);
 201     m_useCtl3D = TRUE;
 202   }
 203 #endif
 204
 205 #if wxUSE_RICHEDIT
 206   if (m_isRich)
 207   {
 208     // Have to enable events
 209     ::SendMessage((HWND)m_hWnd, EM_SETEVENTMASK, 0,
 210                   ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 211   }
 212 #endif
 213
 214   SubclassWin(GetHWND());
 215
 216   if ( parent->GetFont().Ok() && parent->GetFont().Ok() )
 217   {
 218     SetFont(parent->GetFont());
 219   }
 220   else
 221   {
 222     SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 223   }
 224
 225   SetSize(x, y, width, height);
 226
 227   // Causes a crash for Symantec C++ and WIN32 for some reason
 228 #if !(defined(__SC__) && defined(__WIN32__))
 229   if ( !value.IsEmpty() )
 230   {
 231     SetValue(value);
 232   }
 233 #endif
 234
 235   return TRUE;
 236 }
 237
 238 // Make sure the window style (etc.) reflects the HWND style (roughly)
 239 void wxTextCtrl::AdoptAttributesFromHWND(void)
 240 {
 241   wxWindow::AdoptAttributesFromHWND();
 242
 243   HWND hWnd = (HWND) GetHWND();
 244   long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 245
 246     char buf[256];
 247
 248 #ifndef __WIN32__
 249   GetClassName((HWND) hWnd, buf, 256);
 250 #else
 251 #ifdef UNICODE
 252   GetClassNameW((HWND) hWnd, buf, 256);
 253 #else
 254 #ifdef __TWIN32__
 255   GetClassName((HWND) hWnd, buf, 256);
 256 #else
 257   GetClassNameA((HWND) hWnd, buf, 256);
 258 #endif
 259 #endif
 260 #endif
 261
 262   wxString str(buf);
 263   str.UpperCase();
 264
 265   if (str == "EDIT")
 266     m_isRich = FALSE;
 267   else
 268     m_isRich = TRUE;
 269
 270   if (style & ES_MULTILINE)
 271     m_windowStyle |= wxTE_MULTILINE;
 272   if (style & ES_PASSWORD)
 273     m_windowStyle |= wxTE_PASSWORD;
 274   if (style & ES_READONLY)
 275     m_windowStyle |= wxTE_READONLY;
 276   if (style & ES_WANTRETURN)
 277     m_windowStyle |= wxTE_PROCESS_ENTER;
 278 }
 279
 280 void wxTextCtrl::SetupColours(void)
 281 {
 282   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 283   SetForegroundColour(GetParent()->GetForegroundColour());
 284 }
 285
 286 wxString wxTextCtrl::GetValue(void) const
 287 {
 288     int length = GetWindowTextLength((HWND) GetHWND());
 289     char *s = new char[length+1];
 290     GetWindowText((HWND) GetHWND(), s, length+1);
 291     wxString str(s);
 292     delete[] s;
 293   return str;
 294 }
 295
 296 void wxTextCtrl::SetValue(const wxString& value)
 297 {
 298   // If newlines are denoted by just 10, must stick 13 in front.
 299   int singletons = 0;
 300   int len = value.Length();
 301   int i;
 302   for (i = 0; i < len; i ++)
 303   {
 304     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 305       singletons ++;
 306   }
 307   if (singletons > 0)
 308   {
 309     char *tmp = new char[len + singletons + 1];
 310     int j = 0;
 311     for (i = 0; i < len; i ++)
 312     {
 313       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 314       {
 315         tmp[j] = 13;
 316         j ++;
 317       }
 318       tmp[j] = value[i];
 319       j ++;
 320     }
 321     tmp[j] = 0;
 322     SetWindowText((HWND) GetHWND(), tmp);
 323     delete[] tmp;
 324   }
 325   else
 326     SetWindowText((HWND) GetHWND(), (const char *)value);
 327 }
 328
 329 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 330 {
 331   int currentX, currentY;
 332   GetPosition(&currentX, &currentY);
 333   int x1 = x;
 334   int y1 = y;
 335   int w1 = width;
 336   int h1 = height;
 337
 338   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 339     x1 = currentX;
 340   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 341     y1 = currentY;
 342
 343   AdjustForParentClientOrigin(x1, y1, sizeFlags);
 344
 345   int cx; // button font dimensions
 346   int cy;
 347
 348   wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 349
 350   int control_width, control_height, control_x, control_y;
 351
 352   // If we're prepared to use the existing size, then...
 353   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 354   {
 355     GetSize(&w1, &h1);
 356   }
 357
 358   // Deal with default size (using -1 values)
 359   if (w1<=0)
 360     w1 = DEFAULT_ITEM_WIDTH;
 361
 362   control_x = x1;
 363   control_y = y1;
 364   control_width = w1;
 365   control_height = h1;
 366
 367   // Calculations may have made text size too small
 368   if (control_height <= 0)
 369     control_height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 370
 371   if (control_width <= 0)
 372     control_width = DEFAULT_ITEM_WIDTH;
 373
 374   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 375                               (int)control_width, (int)control_height, TRUE);
 376 }
 377
 378 // Clipboard operations
 379 void wxTextCtrl::Copy(void)
 380 {
 381   HWND hWnd = (HWND) GetHWND();
 382   SendMessage(hWnd, WM_COPY, 0, 0L);
 383 }
 384
 385 void wxTextCtrl::Cut(void)
 386 {
 387   HWND hWnd = (HWND) GetHWND();
 388   SendMessage(hWnd, WM_CUT, 0, 0L);
 389 }
 390
 391 void wxTextCtrl::Paste(void)
 392 {
 393   HWND hWnd = (HWND) GetHWND();
 394   SendMessage(hWnd, WM_PASTE, 0, 0L);
 395 }
 396
 397 void wxTextCtrl::SetEditable(bool editable)
 398 {
 399   HWND hWnd = (HWND) GetHWND();
 400   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 401 }
 402
 403 void wxTextCtrl::SetInsertionPoint(long pos)
 404 {
 405   HWND hWnd = (HWND) GetHWND();
 406 #ifdef __WIN32__
 407 #if wxUSE_RICHEDIT
 408   if ( m_isRich)
 409   {
 410     CHARRANGE range;
 411     range.cpMin = pos;
 412     range.cpMax = pos;
 413     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 414     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 415   }
 416   else
 417 #endif
 418   {
 419     SendMessage(hWnd, EM_SETSEL, pos, pos);
 420     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 421   }
 422 #else
 423   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 424 #endif
 425   char *nothing = "";
 426   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 427 }
 428
 429 void wxTextCtrl::SetInsertionPointEnd(void)
 430 {
 431   long pos = GetLastPosition();
 432   SetInsertionPoint(pos);
 433 }
 434
 435 long wxTextCtrl::GetInsertionPoint(void) const
 436 {
 437 #if wxUSE_RICHEDIT
 438   if (m_isRich)
 439   {
 440     CHARRANGE range;
 441     range.cpMin = 0;
 442     range.cpMax = 0;
 443     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 444     return range.cpMin;
 445   }
 446 #endif
 447
 448   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 449   return Pos&0xFFFF;
 450 }
 451
 452 long wxTextCtrl::GetLastPosition(void) const
 453 {
 454     HWND hWnd = (HWND) GetHWND();
 455
 456     // Will always return a number > 0 (according to docs)
 457     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 458
 459     // This gets the char index for the _beginning_ of the last line
 460     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 461
 462     // Get number of characters in the last line. We'll add this to the character
 463     // index for the last line, 1st position.
 464     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 465
 466     return (long)(charIndex + lineLength);
 467 }
 468
 469 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 470 {
 471     HWND hWnd = (HWND) GetHWND();
 472     long fromChar = from;
 473     long toChar = to;
 474
 475     // Set selection and remove it
 476 #ifdef __WIN32__
 477     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 478 #else
 479     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 480 #endif
 481     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 482
 483     // Now replace with 'value', by pasting.
 484     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const char *)value, 0, 0);
 485
 486     // Paste into edit control
 487     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 488 }
 489
 490 void wxTextCtrl::Remove(long from, long to)
 491 {
 492     HWND hWnd = (HWND) GetHWND();
 493     long fromChar = from;
 494     long toChar = to;
 495
 496     // Cut all selected text
 497 #ifdef __WIN32__
 498     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 499 #else
 500     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 501 #endif
 502     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 503 }
 504
 505 void wxTextCtrl::SetSelection(long from, long to)
 506 {
 507     HWND hWnd = (HWND) GetHWND();
 508     long fromChar = from;
 509     long toChar = to;
 510     // if from and to are both -1, it means
 511     // (in wxWindows) that all text should be selected.
 512     // This translates into Windows convention
 513     if ((from == -1) && (to == -1))
 514     {
 515       fromChar = 0;
 516       toChar = -1;
 517     }
 518
 519 #ifdef __WIN32__
 520     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 521     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 522 #else
 523     // WPARAM is 0: selection is scrolled into view
 524     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 525 #endif
 526 }
 527
 528 bool wxTextCtrl::LoadFile(const wxString& file)
 529 {
 530   if (!wxFileExists(WXSTRINGCAST file))
 531     return FALSE;
 532
 533   m_fileName = file;
 534
 535   Clear();
 536
 537 //  ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 538   ifstream input(WXSTRINGCAST file, ios::in);
 539
 540   if (!input.bad())
 541   {
 542       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 543       // line by line into the control. Apart from being very slow this
 544       // was limited to 32K of text by the external interface presenting
 545       // positions as signed shorts. Now load in one chunk...
 546       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 547
 548 #ifdef __SALFORDC__
 549       struct _stat stat_buf;
 550       if (stat((char*) (const char*) file, &stat_buf) < 0)
 551         return FALSE;
 552 #else
 553       struct stat stat_buf;
 554       if (stat(file, &stat_buf) < 0)
 555         return FALSE;
 556 #endif
 557
 558 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 559       // This may need to be a bigger buffer than the file size suggests,
 560       // if it's a UNIX file. Give it an extra 1000 just in case.
 561       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 562       long no_lines = 0;
 563       long pos = 0;
 564       while (!input.eof() && input.peek() != EOF)
 565       {
 566         input.getline(wxBuffer, 500);
 567   int len = strlen(wxBuffer);
 568   wxBuffer[len] = 13;
 569   wxBuffer[len+1] = 10;
 570   wxBuffer[len+2] = 0;
 571   strcpy(tmp_buffer+pos, wxBuffer);
 572   pos += strlen(wxBuffer);
 573   no_lines++;
 574       }
 575
 576 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 577       SetWindowText((HWND) GetHWND(), tmp_buffer);
 578       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 579       farfree(tmp_buffer);
 580
 581       return TRUE;
 582   }
 583   return FALSE;
 584 }
 585
 586 // If file is null, try saved file name first
 587 // Returns TRUE if succeeds.
 588 bool wxTextCtrl::SaveFile(const wxString& file)
 589 {
 590   wxString theFile(file);
 591   if (theFile == "")
 592     theFile = m_fileName;
 593   if (theFile == "")
 594     return FALSE;
 595   m_fileName = theFile;
 596
 597   ofstream output((char*) (const char*) theFile);
 598   if (output.bad())
 599   return FALSE;
 600
 601     // This will only save 64K max
 602     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 603     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 604     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 605     char *pstr = tmp_buffer;
 606
 607   // Convert \r\n to just \n
 608   while (*pstr)
 609   {
 610     if (*pstr != '\r')
 611       output << *pstr;
 612     pstr++;
 613   }
 614
 615     farfree(tmp_buffer);
 616     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 617
 618     return TRUE;
 619 }
 620
 621 void wxTextCtrl::WriteText(const wxString& text)
 622 {
 623     // Covert \n to \r\n
 624     int len = text.Length();
 625     char *newtext = new char[(len*2)+1];
 626     int i = 0;
 627     int j = 0;
 628     while (i < len)
 629     {
 630       if (text[i] == '\n')
 631       {
 632         newtext[j] = '\r';
 633         j ++;
 634       }
 635       newtext[j] = text[i];
 636       i ++;
 637       j ++;
 638     }
 639     newtext[j] = 0;
 640     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 641     delete[] newtext;
 642 }
 643
 644 void wxTextCtrl::Clear(void)
 645 {
 646 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 647     SetWindowText((HWND) GetHWND(), "");
 648 }
 649
 650 bool wxTextCtrl::IsModified(void) const
 651 {
 652     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 653 }
 654
 655 // Makes 'unmodified'
 656 void wxTextCtrl::DiscardEdits(void)
 657 {
 658   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 659 }
 660
 661 /*
 662  * Some of the following functions are yet to be implemented
 663  *
 664  */
 665
 666 int wxTextCtrl::GetNumberOfLines(void) const
 667 {
 668     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 669 }
 670
 671 long wxTextCtrl::XYToPosition(long x, long y) const
 672 {
 673     HWND hWnd = (HWND) GetHWND();
 674
 675     // This gets the char index for the _beginning_ of this line
 676     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 677     return (long)(x + charIndex);
 678 }
 679
 680 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 681 {
 682     HWND hWnd = (HWND) GetHWND();
 683
 684     // This gets the line number containing the character
 685     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 686     // This gets the char index for the _beginning_ of this line
 687     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 688     // The X position must therefore be the different between pos and charIndex
 689     *x = (long)(pos - charIndex);
 690     *y = (long)lineNo;
 691 }
 692
 693 void wxTextCtrl::ShowPosition(long pos)
 694 {
 695     HWND hWnd = (HWND) GetHWND();
 696
 697     // To scroll to a position, we pass the number of lines and characters
 698     // to scroll *by*. This means that we need to:
 699     // (1) Find the line position of the current line.
 700     // (2) Find the line position of pos.
 701     // (3) Scroll by (pos - current).
 702     // For now, ignore the horizontal scrolling.
 703
 704     // Is this where scrolling is relative to - the line containing the caret?
 705     // Or is the first visible line??? Try first visible line.
 706 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 707
 708     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 709
 710     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 711
 712     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 713
 714 /*
 715     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 716       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 717 */
 718
 719     if (linesToScroll != 0)
 720       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 721 }
 722
 723 int wxTextCtrl::GetLineLength(long lineNo) const
 724 {
 725     long charIndex = XYToPosition(0, lineNo);
 726     HWND hWnd = (HWND) GetHWND();
 727     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 728     return len;
 729 }
 730
 731 wxString wxTextCtrl::GetLineText(long lineNo) const
 732 {
 733     HWND hWnd = (HWND) GetHWND();
 734     *(WORD *)wxBuffer = 512;
 735     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 736     wxBuffer[noChars] = 0;
 737   return wxString(wxBuffer);
 738 }
 739
 740 /*
 741  * Text item
 742  */
 743
 744 void wxTextCtrl::Command(wxCommandEvent & event)
 745 {
 746   SetValue (event.GetString());
 747   ProcessCommand (event);
 748 }
 749
 750 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 751 {
 752   // By default, load the first file into the text window.
 753   if (event.GetNumberOfFiles() > 0)
 754   {
 755     LoadFile(event.GetFiles()[0]);
 756   }
 757 }
 758
 759 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 760 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 761
 762 //=========================================================================
 763 // Called then the buffer is full (gcc 2.6.3)
 764 // or when "endl" is output (Borland 4.5)
 765 //=========================================================================
 766 // Class declaration using multiple inheritance doesn't work properly for
 767 // Borland. See note in textctrl.h.
 768 #ifndef NO_TEXT_WINDOW_STREAM
 769 int wxTextCtrl::overflow(int c)
 770 {
 771   // Make sure there is a holding area
 772   // this is not needed in <iostream> usage as it automagically allocates
 773   // it, but does someone want to emulate it for safety's sake?
 774 #if wxUSE_IOSTREAMH
 775   if ( allocate()==EOF )
 776   {
 777     wxLogError("Streambuf allocation failed");
 778     return EOF;
 779   }
 780 #endif
 781
 782   // Verify that there are no characters in get area
 783   if ( gptr() && gptr() < egptr() )
 784   {
 785      wxError("Who's trespassing my get area?","Internal error");
 786      return EOF;
 787   }
 788
 789   // Reset get area
 790   setg(0,0,0);
 791
 792   // Make sure there is a put area
 793   if ( ! pptr() )
 794   {
 795 /* This doesn't seem to be fatal so comment out error message */
 796 //    wxError("Put area not opened","Internal error");
 797
 798 #if wxUSE_IOSTREAMH
 799           setp( base(), base() );
 800 #else
 801           setp( pbase(), pbase() );
 802 #endif
 803   }
 804
 805   // Determine how many characters have been inserted but no consumed
 806   int plen = pptr() - pbase();
 807
 808   // Now Jerry relies on the fact that the buffer is at least 2 chars
 809   // long, but the holding area "may be as small as 1" ???
 810   // And we need an additional \0, so let's keep this inefficient but
 811   // safe copy.
 812
 813   // If c!=EOF, it is a character that must also be comsumed
 814   int xtra = c==EOF? 0 : 1;
 815
 816   // Write temporary C-string to wxTextWindow
 817   {
 818   char *txt = new char[plen+xtra+1];
 819   memcpy(txt, pbase(), plen);
 820   txt[plen] = (char)c;     // append c
 821   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 822     // If the put area already contained \0, output will be truncated there
 823   WriteText(txt);
 824     delete[] txt;
 825   }
 826
 827   // Reset put area
 828   setp(pbase(), epptr());
 829
 830 #if defined(__WATCOMC__)
 831   return __NOT_EOF;
 832 #elif defined(zapeof)     // HP-UX (all cfront based?)
 833   return zapeof(c);
 834 #else
 835   return c!=EOF ? c : 0;  // this should make everybody happy
 836 #endif
 837
 838 /* OLD CODE
 839   int len = pptr() - pbase();
 840   char *txt = new char[len+1];
 841   strncpy(txt, pbase(), len);
 842   txt[len] = '\0';
 843   (*this) << txt;
 844   setp(pbase(), epptr());
 845   delete[] txt;
 846   return EOF;
 847 */
 848 }
 849
 850 //=========================================================================
 851 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 852 //=========================================================================
 853 int wxTextCtrl::sync(void)
 854 {
 855   // Verify that there are no characters in get area
 856   if ( gptr() && gptr() < egptr() )
 857   {
 858      wxError("Who's trespassing my get area?","Internal error");
 859      return EOF;
 860   }
 861
 862   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 863
 864   return 0;
 865 /* OLD CODE
 866   int len = pptr() - pbase();
 867   char *txt = new char[len+1];
 868   strncpy(txt, pbase(), len);
 869   txt[len] = '\0';
 870   (*this) << txt;
 871   setp(pbase(), epptr());
 872   delete[] txt;
 873   return 0;
 874 */
 875 }
 876
 877 //=========================================================================
 878 // Should not be called by a "ostream". Used by a "istream"
 879 //=========================================================================
 880 int wxTextCtrl::underflow(void)
 881 {
 882   return EOF;
 883 }
 884 #endif
 885
 886 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 887 {
 888   WriteText(s);
 889   return *this;
 890 }
 891
 892 wxTextCtrl& wxTextCtrl::operator<<(float f)
 893 {
 894     wxString str;
 895     str.Printf("%.2f", f);
 896     WriteText(str);
 897     return *this;
 898 }
 899
 900 wxTextCtrl& wxTextCtrl::operator<<(double d)
 901 {
 902     wxString str;
 903     str.Printf("%.2f", d);
 904     WriteText(str);
 905     return *this;
 906 }
 907
 908 wxTextCtrl& wxTextCtrl::operator<<(int i)
 909 {
 910     wxString str;
 911     str.Printf("%d", i);
 912     WriteText(str);
 913     return *this;
 914 }
 915
 916 wxTextCtrl& wxTextCtrl::operator<<(long i)
 917 {
 918     wxString str;
 919     str.Printf("%ld", i);
 920     WriteText(str);
 921     return *this;
 922 }
 923
 924 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 925 {
 926     char buf[2];
 927
 928     buf[0] = c;
 929     buf[1] = 0;
 930     WriteText(buf);
 931     return *this;
 932 }
 933
 934 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 935       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 936 {
 937 #if CTL3D
 938   if ( m_useCtl3D )
 939   {
 940     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 941     return (WXHBRUSH) hbrush;
 942   }
 943 #endif
 944
 945   if (GetParent()->GetTransparentBackground())
 946     SetBkMode((HDC) pDC, TRANSPARENT);
 947   else
 948     SetBkMode((HDC) pDC, OPAQUE);
 949
 950   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 951   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 952
 953   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 954
 955   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 956   // has a zero usage count.
 957   // NOT NOW - will be cleaned up at end of app.
 958 //  backgroundBrush->RealizeResource();
 959   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 960 }
 961
 962 void wxTextCtrl::OnChar(wxKeyEvent& event)
 963 {
 964     // Fix by Marcel Rasche to allow Alt-Ctrl insertion of special characters
 965   switch(event.KeyCode())
 966   {
 967   case '{':
 968   case '}':
 969   case '[':
 970   case ']':
 971   case '|':
 972   case '~':
 973   case '\\':
 974    {
 975     char c=(char)event.KeyCode();
 976     *this << c;
 977    }
 978    break;
 979   }
 980   if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 981   {
 982     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 983     event.SetEventObject( this );
 984     if ( GetEventHandler()->ProcessEvent(event) )
 985       return;
 986   }
 987   else if ( event.KeyCode() == WXK_TAB ) {
 988     wxNavigationKeyEvent event;
 989     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 990     event.SetWindowChange(FALSE);
 991     event.SetEventObject(this);
 992
 993     if ( GetEventHandler()->ProcessEvent(event) )
 994       return;
 995   }
 996
 997   event.Skip();
 998 }
 999
1000 long wxTextCtrl::MSWGetDlgCode()
1001 {
1002   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
1003   if ( m_windowStyle & wxTE_PROCESS_ENTER )
1004     lRc |= DLGC_WANTMESSAGE;
1005   else if ( m_windowStyle & wxTE_MULTILINE )
1006     lRc |= DLGC_WANTMESSAGE;
1007   // ??
1008   if ( m_windowStyle & wxTE_PROCESS_TAB )
1009     lRc |= DLGC_WANTTAB;
1010
1011   return lRc;
1012 }
1013
1014 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1015 {
1016     if ( m_windowStyle & wxTE_MULTILINE )
1017     {
1018         // No flicker - only problem is we probably can't change the background
1019         Default();
1020 /*
1021         RECT rect;
1022         ::GetClientRect((HWND) GetHWND(), &rect);
1023
1024         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
1025         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
1026
1027         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
1028         ::DeleteObject(hBrush);
1029         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
1030 */
1031     }
1032 //        wxWindow::OnEraseBackground(event);
1033 }
1034
1035 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1036 {
1037 /*
1038   // Debugging
1039   wxDebugMsg("Edit control %d: ", (int)id);
1040   switch (param)
1041   {
1042     case EN_SETFOCUS:
1043       wxDebugMsg("EN_SETFOCUS\n");
1044       break;
1045     case EN_KILLFOCUS:
1046       wxDebugMsg("EN_KILLFOCUS\n");
1047       break;
1048     case EN_CHANGE:
1049       wxDebugMsg("EN_CHANGE\n");
1050       break;
1051     case EN_UPDATE:
1052       wxDebugMsg("EN_UPDATE\n");
1053       break;
1054     case EN_ERRSPACE:
1055       wxDebugMsg("EN_ERRSPACE\n");
1056       break;
1057     case EN_MAXTEXT:
1058       wxDebugMsg("EN_MAXTEXT\n");
1059       break;
1060     case EN_HSCROLL:
1061       wxDebugMsg("EN_HSCROLL\n");
1062       break;
1063     case EN_VSCROLL:
1064       wxDebugMsg("EN_VSCROLL\n");
1065       break;
1066     default:
1067       wxDebugMsg("Unknown EDIT notification\n");
1068       break;
1069   }
1070 */
1071   switch (param)
1072   {
1073     case EN_SETFOCUS:
1074     case EN_KILLFOCUS:
1075       {
1076         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1077                                                  : wxEVT_SET_FOCUS,
1078                            m_windowId);
1079         event.SetEventObject( this );
1080         GetEventHandler()->ProcessEvent(event);
1081       }
1082       break;
1083
1084     case EN_CHANGE:
1085       {
1086         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1087         wxString val(GetValue());
1088         if ( !val.IsNull() )
1089           event.m_commandString = WXSTRINGCAST val;
1090         event.SetEventObject( this );
1091         ProcessCommand(event);
1092       }
1093       break;
1094
1095     // the other notification messages are not processed
1096     case EN_UPDATE:
1097     case EN_ERRSPACE:
1098     case EN_MAXTEXT:
1099     case EN_HSCROLL:
1100     case EN_VSCROLL:
1101     default:
1102       return FALSE;
1103   }
1104
1105   // processed
1106   return TRUE;
1107 }
1108
1109
1110 // For Rich Edit controls. Do we need it?
1111 #if 0
1112 #if wxUSE_RICHEDIT
1113 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1114 {
1115   wxCommandEvent event(0, m_windowId);
1116   int eventType = 0;
1117   NMHDR *hdr1 = (NMHDR *) lParam;
1118   switch ( hdr1->code )
1119   {
1120     // Insert case code here
1121     default :
1122       return wxControl::MSWNotify(wParam, lParam);
1123       break;
1124   }
1125
1126   event.SetEventObject( this );
1127   event.SetEventType(eventType);
1128
1129   if ( !GetEventHandler()->ProcessEvent(event) )
1130     return FALSE;
1131
1132     return TRUE;
1133 }
1134 #endif
1135 #endif
1136