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 #endif
  27
  28 #if USE_CLIPBOARD
  29 #include "wx/app.h"
  30 #include "wx/clipbrd.h"
  31 #endif
  32
  33 #include "wx/msw/private.h"
  34
  35 #include <windows.h>
  36 #include <stdlib.h>
  37 #include "fstream.h"
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #if defined(__BORLANDC__) && !defined(__WIN32__)
  42 #include <alloc.h>
  43 #else
  44 #ifndef __GNUWIN32__
  45 #include <malloc.h>
  46 #endif
  47 #define farmalloc malloc
  48 #define farfree free
  49 #endif
  50 #include <windowsx.h>
  51
  52 #include <string.h>
  53
  54 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  55 #include <richedit.h>
  56 #endif
  57
  58 #if !USE_SHARED_LIBRARY
  59 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  60
  61 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  62         EVT_CHAR(wxTextCtrl::OnChar)
  63         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  64         EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
  65 END_EVENT_TABLE()
  66
  67 #endif
  68
  69 // Text item
  70 wxTextCtrl::wxTextCtrl(void)
  71 #ifndef NO_TEXT_WINDOW_STREAM
  72  :streambuf()
  73 #endif
  74 {
  75   fileName = "";
  76   m_isRich = FALSE;
  77 }
  78
  79 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
  80                    const wxString& value,
  81            const wxPoint& pos,
  82            const wxSize& size, long style,
  83            const wxValidator& validator,
  84            const wxString& name)
  85 {
  86   fileName = "";
  87   SetName(name);
  88   SetValidator(validator);
  89   if (parent) parent->AddChild(this);
  90
  91   m_windowStyle = style;
  92
  93   // Should this be taken from the system colours?
  94 //  SetBackgroundColour(wxColour(255, 255, 255));
  95
  96   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
  97
  98   SetForegroundColour(parent->GetDefaultForegroundColour()) ;
  99
 100   if ( id == -1 )
 101         m_windowId = (int)NewControlId();
 102   else
 103         m_windowId = id;
 104
 105   int x = pos.x;
 106   int y = pos.y;
 107   int width = size.x;
 108   int height = size.y;
 109
 110 #ifdef __WIN32__
 111   WXHGLOBAL m_globalHandle = 0;
 112 #else
 113   // Obscure method from the MS Developer's Network Disk for
 114   // using global memory instead of the local heap, which
 115   // runs out far too soon. Solves the problem with
 116   // failing to appear.
 117
 118   // Doesn't seem to work for Win95, so removing.
 119   m_globalHandle=0;
 120 //  if ((wxGetOsVersion() != wxWINDOWS_NT) && (wxGetOsVersion() != wxWIN95))
 121 //    m_globalHandle = (WXHGLOBAL) GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT,
 122 //                         256L);
 123 #endif
 124   long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 125   if (m_windowStyle & wxTE_MULTILINE)
 126         msStyle |= ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL ; // WS_BORDER
 127   else
 128     msStyle |= ES_AUTOHSCROLL ;
 129
 130   if (m_windowStyle & wxTE_READONLY)
 131     msStyle |= ES_READONLY;
 132
 133   if (m_windowStyle & wxHSCROLL)
 134     msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL) ;
 135   if (m_windowStyle & wxTE_PASSWORD) // hidden input
 136     msStyle |= ES_PASSWORD;
 137
 138   char *windowClass = "EDIT";
 139 #if defined(__WIN95__)
 140   if ( m_windowStyle & wxTE_MULTILINE )
 141 #else
 142   if ( FALSE )
 143 #endif
 144   {
 145       msStyle |= ES_AUTOVSCROLL;
 146           m_isRich = TRUE;
 147           windowClass = "RichEdit" ;
 148   }
 149   else
 150           m_isRich = FALSE;
 151
 152   bool want3D;
 153   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 154
 155   // If we're in Win95, and we want a simple 2D border,
 156   // then make it an EDIT control instead.
 157 #if defined(__WIN95__)
 158   if (m_windowStyle & wxSIMPLE_BORDER)
 159   {
 160     windowClass = "EDIT";
 161         m_isRich = FALSE;
 162   }
 163 #endif
 164
 165   // Even with extended styles, need to combine with WS_BORDER
 166   // for them to look right.
 167   if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
 168        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 169     msStyle |= WS_BORDER;
 170
 171   HWND edit = CreateWindowEx(exStyle, windowClass, NULL,
 172                         msStyle,
 173                         0, 0, 0, 0, (HWND) ((wxWindow*)parent)->GetHWND(), (HMENU)m_windowId,
 174                         m_globalHandle ? (HINSTANCE) m_globalHandle : wxGetInstance(), NULL);
 175
 176 #if CTL3D
 177   if ( want3D )
 178   {
 179     Ctl3dSubclassCtl(edit);
 180         m_useCtl3D = TRUE;
 181   }
 182 #endif
 183
 184   m_hWnd = (WXHWND)edit;
 185
 186 #if defined(__WIN95__)
 187   if (m_isRich)
 188   {
 189         // Have to enable events
 190         ::SendMessage(edit, EM_SETEVENTMASK, 0, ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 191   }
 192 #endif
 193
 194   SubclassWin(GetHWND());
 195
 196   if ( parent->GetFont() && parent->GetFont()->Ok() )
 197   {
 198         SetFont(* parent->GetFont());
 199   }
 200   else
 201   {
 202         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 203   }
 204
 205   SetSize(x, y, width, height);
 206
 207   // Causes a crash for Symantec C++ and WIN32 for some reason
 208 #if !(defined(__SC__) && defined(__WIN32__))
 209   if (value != "")
 210     SetWindowText(edit, (const char *)value);
 211 #endif
 212
 213   return TRUE;
 214 }
 215
 216 // Make sure the window style (etc.) reflects the HWND style (roughly)
 217 void wxTextCtrl::AdoptAttributesFromHWND(void)
 218 {
 219         wxWindow::AdoptAttributesFromHWND();
 220
 221         HWND hWnd = (HWND) GetHWND();
 222         long style = GetWindowLong((HWND) hWnd, GWL_STYLE);
 223
 224     char buf[256];
 225
 226 #ifndef __WIN32__
 227         GetClassName((HWND) hWnd, buf, 256);
 228 #else
 229 #ifdef UNICODE
 230         GetClassNameW((HWND) hWnd, buf, 256);
 231 #else
 232         GetClassNameA((HWND) hWnd, buf, 256);
 233 #endif
 234 #endif
 235
 236         wxString str(buf);
 237         str.UpperCase();
 238
 239         if (str == "EDIT")
 240                 m_isRich = FALSE;
 241         else
 242                 m_isRich = TRUE;
 243
 244         if (style & ES_MULTILINE)
 245                 m_windowStyle |= wxTE_MULTILINE;
 246         if (style & ES_PASSWORD)
 247                 m_windowStyle |= wxTE_PASSWORD;
 248         if (style & ES_READONLY)
 249                 m_windowStyle |= wxTE_READONLY;
 250         if (style & ES_WANTRETURN)
 251                 m_windowStyle |= wxTE_PROCESS_ENTER;
 252 }
 253
 254 void wxTextCtrl::SetupColours(void)
 255 {
 256   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 257   SetForegroundColour(GetParent()->GetDefaultForegroundColour());
 258 }
 259
 260 wxString wxTextCtrl::GetValue(void) const
 261 {
 262     int length = GetWindowTextLength((HWND) GetHWND());
 263     char *s = new char[length+1];
 264     GetWindowText((HWND) GetHWND(), s, length+1);
 265     wxString str(s);
 266     delete[] s;
 267         return str;
 268 }
 269
 270 void wxTextCtrl::SetValue(const wxString& value)
 271 {
 272   // If newlines are denoted by just 10, must stick 13 in front.
 273   int singletons = 0;
 274   int len = value.Length();
 275   int i;
 276   for (i = 0; i < len; i ++)
 277   {
 278     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 279       singletons ++;
 280   }
 281   if (singletons > 0)
 282   {
 283     char *tmp = new char[len + singletons + 1];
 284     int j = 0;
 285     for (i = 0; i < len; i ++)
 286     {
 287       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 288       {
 289         tmp[j] = 13;
 290         j ++;
 291       }
 292       tmp[j] = value[i];
 293       j ++;
 294     }
 295     tmp[j] = 0;
 296     SetWindowText((HWND) GetHWND(), tmp);
 297     delete[] tmp;
 298   }
 299   else
 300     SetWindowText((HWND) GetHWND(), (const char *)value);
 301 }
 302
 303 void wxTextCtrl::SetSize(int x, int y, int width, int height, int sizeFlags)
 304 {
 305   int currentX, currentY;
 306   GetPosition(&currentX, &currentY);
 307   int x1 = x;
 308   int y1 = y;
 309   int w1 = width;
 310   int h1 = height;
 311
 312   if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 313     x1 = currentX;
 314   if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 315     y1 = currentY;
 316
 317   int cx; // button font dimensions
 318   int cy;
 319
 320   wxGetCharSize(GetHWND(), &cx, &cy,GetFont());
 321
 322   float control_width, control_height, control_x, control_y;
 323
 324   // If we're prepared to use the existing size, then...
 325   if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 326   {
 327     GetSize(&w1, &h1);
 328   }
 329
 330   // Deal with default size (using -1 values)
 331   if (w1<=0)
 332     w1 = DEFAULT_ITEM_WIDTH;
 333
 334   control_x = (float)x1;
 335   control_y = (float)y1;
 336   control_width = (float)w1;
 337   control_height = (float)h1;
 338
 339   // Calculations may have made text size too small
 340   if (control_height <= 0)
 341     control_height = (float)(int)(cy*EDIT_CONTROL_FACTOR) ;
 342
 343   if (control_width <= 0)
 344     control_width = (float)DEFAULT_ITEM_WIDTH;
 345
 346   MoveWindow((HWND) GetHWND(), (int)control_x, (int)control_y,
 347                               (int)control_width, (int)control_height, TRUE);
 348 }
 349
 350 // Clipboard operations
 351 void wxTextCtrl::Copy(void)
 352 {
 353   HWND hWnd = (HWND) GetHWND();
 354   SendMessage(hWnd, WM_COPY, 0, 0L);
 355 }
 356
 357 void wxTextCtrl::Cut(void)
 358 {
 359   HWND hWnd = (HWND) GetHWND();
 360   SendMessage(hWnd, WM_CUT, 0, 0L);
 361 }
 362
 363 void wxTextCtrl::Paste(void)
 364 {
 365   HWND hWnd = (HWND) GetHWND();
 366   SendMessage(hWnd, WM_PASTE, 0, 0L);
 367 }
 368
 369 void wxTextCtrl::SetEditable(bool editable)
 370 {
 371   HWND hWnd = (HWND) GetHWND();
 372   SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 373 }
 374
 375 void wxTextCtrl::SetInsertionPoint(long pos)
 376 {
 377   HWND hWnd = (HWND) GetHWND();
 378 #ifdef __WIN32__
 379 #if defined(__WIN95__)
 380   if ( m_isRich)
 381   {
 382     CHARRANGE range;
 383     range.cpMin = pos;
 384     range.cpMax = pos;
 385     SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 386     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 387   }
 388   else
 389 #endif
 390   {
 391     SendMessage(hWnd, EM_SETSEL, pos, pos);
 392     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 393   }
 394 #else
 395   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 396 #endif
 397   char *nothing = "";
 398   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 399 }
 400
 401 void wxTextCtrl::SetInsertionPointEnd(void)
 402 {
 403   long pos = GetLastPosition();
 404   SetInsertionPoint(pos);
 405 }
 406
 407 long wxTextCtrl::GetInsertionPoint(void) const
 408 {
 409 #if defined(__WIN95__)
 410   if (m_isRich)
 411   {
 412     CHARRANGE range;
 413     range.cpMin = 0;
 414     range.cpMax = 0;
 415     SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) &range);
 416     return range.cpMin;
 417   }
 418 #endif
 419
 420   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 421   return Pos&0xFFFF;
 422 }
 423
 424 long wxTextCtrl::GetLastPosition(void) const
 425 {
 426     HWND hWnd = (HWND) GetHWND();
 427
 428     // Will always return a number > 0 (according to docs)
 429     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 430
 431     // This gets the char index for the _beginning_ of the last line
 432     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 433
 434     // Get number of characters in the last line. We'll add this to the character
 435     // index for the last line, 1st position.
 436     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 437
 438     return (long)(charIndex + lineLength);
 439 }
 440
 441 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 442 {
 443     HWND hWnd = (HWND) GetHWND();
 444     long fromChar = from;
 445     long toChar = to;
 446
 447     // Set selection and remove it
 448 #ifdef __WIN32__
 449     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 450 #else
 451     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 452 #endif
 453     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 454
 455     // Now replace with 'value', by pasting.
 456     wxSetClipboardData(wxCF_TEXT, (wxObject *) (const char *)value, 0, 0);
 457
 458     // Paste into edit control
 459     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 460 }
 461
 462 void wxTextCtrl::Remove(long from, long to)
 463 {
 464     HWND hWnd = (HWND) GetHWND();
 465     long fromChar = from;
 466     long toChar = to;
 467
 468     // Cut all selected text
 469 #ifdef __WIN32__
 470     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 471 #else
 472     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 473 #endif
 474     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 475 }
 476
 477 void wxTextCtrl::SetSelection(long from, long to)
 478 {
 479     HWND hWnd = (HWND) GetHWND();
 480     long fromChar = from;
 481     long toChar = to;
 482     // if from and to are both -1, it means
 483     // (in wxWindows) that all text should be selected.
 484     // This translates into Windows convention
 485     if ((from == -1) && (to == -1))
 486     {
 487       fromChar = 0;
 488       toChar = -1;
 489     }
 490
 491 #ifdef __WIN32__
 492     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 493     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 494 #else
 495     // WPARAM is 0: selection is scrolled into view
 496     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 497 #endif
 498 }
 499
 500 bool wxTextCtrl::LoadFile(const wxString& file)
 501 {
 502   if (!FileExists(WXSTRINGCAST file))
 503     return FALSE;
 504
 505   fileName = file;
 506
 507   Clear();
 508
 509   ifstream input(WXSTRINGCAST file, ios::nocreate | ios::in);
 510
 511   if (!input.bad())
 512   {
 513       // Previously a SETSEL/REPLACESEL call-pair were done to insert
 514       // line by line into the control. Apart from being very slow this
 515       // was limited to 32K of text by the external interface presenting
 516       // positions as signed shorts. Now load in one chunk...
 517       // Note use of 'farmalloc' as in Borland 3.1 'size_t' is 16-bits...
 518
 519       struct stat stat_buf;
 520       if (stat(file, &stat_buf) < 0)
 521         return FALSE;
 522 //      char *tmp_buffer = (char*)farmalloc(stat_buf.st_size+1);
 523       // This may need to be a bigger buffer than the file size suggests,
 524       // if it's a UNIX file. Give it an extra 1000 just in case.
 525       char *tmp_buffer = (char*)farmalloc((size_t)(stat_buf.st_size+1+1000));
 526       long no_lines = 0;
 527       long pos = 0;
 528       while (!input.eof() && input.peek() != EOF)
 529       {
 530         input.getline(wxBuffer, 500);
 531         int len = strlen(wxBuffer);
 532         wxBuffer[len] = 13;
 533         wxBuffer[len+1] = 10;
 534         wxBuffer[len+2] = 0;
 535         strcpy(tmp_buffer+pos, wxBuffer);
 536         pos += strlen(wxBuffer);
 537         no_lines++;
 538       }
 539
 540 //      SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)tmp_buffer);
 541       SetWindowText((HWND) GetHWND(), tmp_buffer);
 542       SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 543       farfree(tmp_buffer);
 544
 545       return TRUE;
 546   }
 547   return FALSE;
 548 }
 549
 550 // If file is null, try saved file name first
 551 // Returns TRUE if succeeds.
 552 bool wxTextCtrl::SaveFile(const wxString& file)
 553 {
 554   wxString theFile;
 555   if (file == "")
 556     theFile = fileName;
 557   if (file == "")
 558     return FALSE;
 559   fileName = theFile;
 560
 561   ofstream output(WXSTRINGCAST file);
 562   if (output.bad())
 563         return FALSE;
 564
 565     // This will only save 64K max
 566     unsigned long nbytes = SendMessage((HWND) GetHWND(), WM_GETTEXTLENGTH, 0, 0);
 567     char *tmp_buffer = (char*)farmalloc((size_t)(nbytes+1));
 568     SendMessage((HWND) GetHWND(), WM_GETTEXT, (WPARAM)(nbytes+1), (LPARAM)tmp_buffer);
 569     char *pstr = tmp_buffer;
 570
 571         // Convert \r\n to just \n
 572         while (*pstr)
 573         {
 574                 if (*pstr != '\r')
 575                         output << *pstr;
 576                 pstr++;
 577         }
 578
 579     farfree(tmp_buffer);
 580     SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 581
 582     return TRUE;
 583 }
 584
 585 void wxTextCtrl::WriteText(const wxString& text)
 586 {
 587     // Covert \n to \r\n
 588     int len = text.Length();
 589     char *newtext = new char[(len*2)+1];
 590     int i = 0;
 591     int j = 0;
 592     while (i < len)
 593     {
 594       if (text[i] == '\n')
 595       {
 596         newtext[j] = '\r';
 597         j ++;
 598       }
 599       newtext[j] = text[i];
 600       i ++;
 601       j ++;
 602     }
 603     newtext[j] = 0;
 604     SendMessage((HWND) GetHWND(), EM_REPLACESEL, 0, (LPARAM)newtext);
 605     delete[] newtext;
 606 }
 607
 608 void wxTextCtrl::Clear(void)
 609 {
 610 //    SendMessage((HWND) GetHWND(), WM_SETTEXT, 0, (LPARAM)"");
 611     SetWindowText((HWND) GetHWND(), "");
 612 }
 613
 614 bool wxTextCtrl::IsModified(void) const
 615 {
 616     return (SendMessage((HWND) GetHWND(), EM_GETMODIFY, 0, 0) != 0);
 617 }
 618
 619 // Makes 'unmodified'
 620 void wxTextCtrl::DiscardEdits(void)
 621 {
 622   SendMessage((HWND) GetHWND(), EM_SETMODIFY, FALSE, 0L);
 623 }
 624
 625 /*
 626  * Some of the following functions are yet to be implemented
 627  *
 628  */
 629
 630 int wxTextCtrl::GetNumberOfLines(void) const
 631 {
 632     return (int)SendMessage((HWND) GetHWND(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 633 }
 634
 635 long wxTextCtrl::XYToPosition(long x, long y) const
 636 {
 637     HWND hWnd = (HWND) GetHWND();
 638
 639     // This gets the char index for the _beginning_ of this line
 640     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 641     return (long)(x + charIndex);
 642 }
 643
 644 void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 645 {
 646     HWND hWnd = (HWND) GetHWND();
 647
 648     // This gets the line number containing the character
 649     int lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0);
 650     // This gets the char index for the _beginning_ of this line
 651     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 652     // The X position must therefore be the different between pos and charIndex
 653     *x = (long)(pos - charIndex);
 654     *y = (long)lineNo;
 655 }
 656
 657 void wxTextCtrl::ShowPosition(long pos)
 658 {
 659     HWND hWnd = (HWND) GetHWND();
 660
 661     // To scroll to a position, we pass the number of lines and characters
 662     // to scroll *by*. This means that we need to:
 663     // (1) Find the line position of the current line.
 664     // (2) Find the line position of pos.
 665     // (3) Scroll by (pos - current).
 666     // For now, ignore the horizontal scrolling.
 667
 668     // Is this where scrolling is relative to - the line containing the caret?
 669     // Or is the first visible line??? Try first visible line.
 670 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 671
 672     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 673
 674     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 675
 676     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 677
 678 /*
 679     wxDebugMsg("Caret line: %d; Current visible line: %d; Specified line: %d; lines to scroll: %d\n",
 680       currentLineLineNo1, currentLineLineNo, specifiedLineLineNo, linesToScroll);
 681 */
 682
 683     if (linesToScroll != 0)
 684       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
 685 }
 686
 687 int wxTextCtrl::GetLineLength(long lineNo) const
 688 {
 689     long charIndex = XYToPosition(0, lineNo);
 690     HWND hWnd = (HWND) GetHWND();
 691     int len = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0);
 692     return len;
 693 }
 694
 695 wxString wxTextCtrl::GetLineText(long lineNo) const
 696 {
 697     HWND hWnd = (HWND) GetHWND();
 698     *(WORD *)wxBuffer = 512;
 699     int noChars = (int)SendMessage(hWnd, EM_GETLINE, (WPARAM)lineNo, (LPARAM)wxBuffer);
 700     wxBuffer[noChars] = 0;
 701         return wxString(wxBuffer);
 702 }
 703
 704 /*
 705  * Text item
 706  */
 707
 708 void wxTextCtrl::Command(wxCommandEvent & event)
 709 {
 710   SetValue (event.GetString());
 711   ProcessCommand (event);
 712 }
 713
 714 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 715 {
 716   // By default, load the first file into the text window.
 717   if (event.GetNumberOfFiles() > 0)
 718   {
 719     LoadFile(event.GetFiles()[0]);
 720   }
 721 }
 722
 723 // The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
 724 // AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
 725
 726 //=========================================================================
 727 // Called then the buffer is full (gcc 2.6.3)
 728 // or when "endl" is output (Borland 4.5)
 729 //=========================================================================
 730 // Class declaration using multiple inheritance doesn't work properly for
 731 // Borland. See note in wb_text.h.
 732 #ifndef NO_TEXT_WINDOW_STREAM
 733 int wxTextCtrl::overflow(int c)
 734 {
 735   // Make sure there is a holding area
 736   if ( allocate()==EOF )
 737   {
 738     wxError("Streambuf allocation failed","Internal error");
 739     return EOF;
 740   }
 741
 742   // Verify that there are no characters in get area
 743   if ( gptr() && gptr() < egptr() )
 744   {
 745      wxError("Who's trespassing my get area?","Internal error");
 746      return EOF;
 747   }
 748
 749   // Reset get area
 750   setg(0,0,0);
 751
 752   // Make sure there is a put area
 753   if ( ! pptr() )
 754   {
 755 /* This doesn't seem to be fatal so comment out error message */
 756 //    wxError("Put area not opened","Internal error");
 757     setp( base(), base() );
 758   }
 759
 760   // Determine how many characters have been inserted but no consumed
 761   int plen = pptr() - pbase();
 762
 763   // Now Jerry relies on the fact that the buffer is at least 2 chars
 764   // long, but the holding area "may be as small as 1" ???
 765   // And we need an additional \0, so let's keep this inefficient but
 766   // safe copy.
 767
 768   // If c!=EOF, it is a character that must also be comsumed
 769   int xtra = c==EOF? 0 : 1;
 770
 771   // Write temporary C-string to wxTextWindow
 772   {
 773   char *txt = new char[plen+xtra+1];
 774   memcpy(txt, pbase(), plen);
 775   txt[plen] = (char)c;     // append c
 776   txt[plen+xtra] = '\0';   // append '\0' or overwrite c
 777     // If the put area already contained \0, output will be truncated there
 778   WriteText(txt);
 779     delete[] txt;
 780   }
 781
 782   // Reset put area
 783   setp(pbase(), epptr());
 784
 785 #if defined(__WATCOMC__)
 786   return __NOT_EOF;
 787 #elif defined(zapeof)     // HP-UX (all cfront based?)
 788   return zapeof(c);
 789 #else
 790   return c!=EOF ? c : 0;  // this should make everybody happy
 791 #endif
 792
 793 /* OLD CODE
 794   int len = pptr() - pbase();
 795   char *txt = new char[len+1];
 796   strncpy(txt, pbase(), len);
 797   txt[len] = '\0';
 798   (*this) << txt;
 799   setp(pbase(), epptr());
 800   delete[] txt;
 801   return EOF;
 802 */
 803 }
 804
 805 //=========================================================================
 806 // called then "endl" is output (gcc) or then explicit sync is done (Borland)
 807 //=========================================================================
 808 int wxTextCtrl::sync(void)
 809 {
 810   // Verify that there are no characters in get area
 811   if ( gptr() && gptr() < egptr() )
 812   {
 813      wxError("Who's trespassing my get area?","Internal error");
 814      return EOF;
 815   }
 816
 817   if ( pptr() && pptr() > pbase() ) return overflow(EOF);
 818
 819   return 0;
 820 /* OLD CODE
 821   int len = pptr() - pbase();
 822   char *txt = new char[len+1];
 823   strncpy(txt, pbase(), len);
 824   txt[len] = '\0';
 825   (*this) << txt;
 826   setp(pbase(), epptr());
 827   delete[] txt;
 828   return 0;
 829 */
 830 }
 831
 832 //=========================================================================
 833 // Should not be called by a "ostream". Used by a "istream"
 834 //=========================================================================
 835 int wxTextCtrl::underflow(void)
 836 {
 837   return EOF;
 838 }
 839 #endif
 840
 841 wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
 842 {
 843   WriteText(s);
 844   return *this;
 845 }
 846
 847 wxTextCtrl& wxTextCtrl::operator<<(float f)
 848 {
 849   static char buf[100];
 850   sprintf(buf, "%.2f", f);
 851   WriteText(buf);
 852   return *this;
 853 }
 854
 855 wxTextCtrl& wxTextCtrl::operator<<(double d)
 856 {
 857   static char buf[100];
 858   sprintf(buf, "%.2f", d);
 859   WriteText(buf);
 860   return *this;
 861 }
 862
 863 wxTextCtrl& wxTextCtrl::operator<<(int i)
 864 {
 865   static char buf[100];
 866   sprintf(buf, "%i", i);
 867   WriteText(buf);
 868   return *this;
 869 }
 870
 871 wxTextCtrl& wxTextCtrl::operator<<(long i)
 872 {
 873   static char buf[100];
 874   sprintf(buf, "%ld", i);
 875   WriteText(buf);
 876   return *this;
 877 }
 878
 879 wxTextCtrl& wxTextCtrl::operator<<(const char c)
 880 {
 881   char buf[2];
 882
 883   buf[0] = c;
 884   buf[1] = 0;
 885   WriteText(buf);
 886   return *this;
 887 }
 888
 889
 890 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 891                         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 892 {
 893 #if CTL3D
 894   if ( m_useCtl3D )
 895   {
 896     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 897     return (WXHBRUSH) hbrush;
 898   }
 899 #endif
 900
 901   if (GetParent()->GetTransparentBackground())
 902     SetBkMode((HDC) pDC, TRANSPARENT);
 903   else
 904     SetBkMode((HDC) pDC, OPAQUE);
 905
 906   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 907   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 908
 909   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 910
 911   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 912   // has a zero usage count.
 913   // NOT NOW - will be cleaned up at end of app.
 914 //  backgroundBrush->RealizeResource();
 915   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 916 }
 917
 918 void wxTextCtrl::OnChar(wxKeyEvent& event)
 919 {
 920         if ( (event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 921         {
 922                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 923                 event.SetEventObject( this );
 924                 if ( GetEventHandler()->ProcessEvent(event) )
 925       return;
 926         }
 927   else if ( event.KeyCode() == WXK_TAB ) {
 928     wxNavigationKeyEvent event;
 929     event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 930     event.SetWindowChange(FALSE);
 931     event.SetEventObject(this);
 932
 933     if ( GetEventHandler()->ProcessEvent(event) )
 934       return;
 935   }
 936
 937   event.Skip();
 938 }
 939
 940 long wxTextCtrl::MSWGetDlgCode()
 941 {
 942   long lRc = DLGC_WANTCHARS | DLGC_WANTARROWS;
 943   if ( m_windowStyle & wxPROCESS_ENTER ) {
 944     lRc |= DLGC_WANTMESSAGE;
 945   }
 946
 947   return lRc;
 948 }
 949
 950 /*
 951 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 952 {
 953     switch (nMsg)
 954     {
 955       case WM_GETDLGCODE:
 956       {
 957         if (GetWindowStyleFlag() & wxPROCESS_ENTER)
 958           return DLGC_WANTALLKEYS;
 959         break;
 960       }
 961       case WM_CHAR: // Always an ASCII character
 962       {
 963         if (wParam == VK_RETURN)
 964         {
 965           wxCommandEvent event(wxEVENT_TYPE_TEXT_ENTER_COMMAND);
 966           event.commandString = ((wxTextCtrl *)item)->GetValue();
 967           event.eventObject = item;
 968           item->ProcessCommand(event);
 969           return FALSE;
 970         }
 971         break;
 972       }
 973     default:
 974         break;
 975     }
 976
 977   return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 978 }
 979 */
 980
 981 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
 982 {
 983     if ( m_windowStyle & wxTE_MULTILINE )
 984     {
 985         // No flicker - only problem is we probably can't change the background
 986         Default();
 987 /*
 988         RECT rect;
 989         ::GetClientRect((HWND) GetHWND(), &rect);
 990
 991         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 992         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 993
 994         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 995         ::DeleteObject(hBrush);
 996         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 997 */
 998     }
 999 //        wxWindow::OnEraseBackground(event);
1000 }
1001
1002 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1003 {
1004 /*
1005   // Debugging
1006   wxDebugMsg("Edit control %d: ", (int)id);
1007   switch (param)
1008   {
1009     case EN_SETFOCUS:
1010       wxDebugMsg("EN_SETFOCUS\n");
1011       break;
1012     case EN_KILLFOCUS:
1013       wxDebugMsg("EN_KILLFOCUS\n");
1014       break;
1015     case EN_CHANGE:
1016       wxDebugMsg("EN_CHANGE\n");
1017       break;
1018     case EN_UPDATE:
1019       wxDebugMsg("EN_UPDATE\n");
1020       break;
1021     case EN_ERRSPACE:
1022       wxDebugMsg("EN_ERRSPACE\n");
1023       break;
1024     case EN_MAXTEXT:
1025       wxDebugMsg("EN_MAXTEXT\n");
1026       break;
1027     case EN_HSCROLL:
1028       wxDebugMsg("EN_HSCROLL\n");
1029       break;
1030     case EN_VSCROLL:
1031       wxDebugMsg("EN_VSCROLL\n");
1032       break;
1033     default:
1034       wxDebugMsg("Unknown EDIT notification\n");
1035       break;
1036   }
1037 */
1038   switch (param)
1039   {
1040     case EN_SETFOCUS:
1041     case EN_KILLFOCUS:
1042       {
1043         wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1044                                                  : wxEVT_SET_FOCUS,
1045                            m_windowId);
1046         event.SetEventObject( this );
1047         ProcessEvent(event);
1048       }
1049       break;
1050
1051     case EN_CHANGE:
1052       {
1053         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1054         wxString val(GetValue());
1055         if ( !val.IsNull() )
1056           event.m_commandString = WXSTRINGCAST val;
1057         event.SetEventObject( this );
1058         ProcessCommand(event);
1059       }
1060       break;
1061
1062     // the other notification messages are not processed
1063     case EN_UPDATE:
1064     case EN_ERRSPACE:
1065     case EN_MAXTEXT:
1066     case EN_HSCROLL:
1067     case EN_VSCROLL:
1068     default:
1069       return FALSE;
1070   }
1071
1072   // processed
1073   return TRUE;
1074 }
1075
1076
1077 // For Rich Edit controls. Do we need it?
1078 #if 0
1079 #if defined(__WIN95__)
1080 bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
1081 {
1082         wxCommandEvent event(0, m_windowId);
1083         int eventType = 0;
1084         NMHDR *hdr1 = (NMHDR *) lParam;
1085         switch ( hdr1->code )
1086         {
1087                 // Insert case code here
1088                 default :
1089                         return wxControl::MSWNotify(wParam, lParam);
1090                         break;
1091         }
1092
1093         event.SetEventObject( this );
1094         event.SetEventType(eventType);
1095
1096         if ( !ProcessEvent(event) )
1097                 return FALSE;
1098
1099         return TRUE;
1100 }
1101 #endif
1102 #endif
1103