src/gtk/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "textctrl.h"
  12 #endif
  13
  14 #include "wx/textctrl.h"
  15 #include "wx/utils.h"
  16 #include "wx/intl.h"
  17 #include "wx/log.h"
  18 #include "wx/settings.h"
  19 #include "wx/panel.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <ctype.h>
  24 #include <math.h>               // for fabs
  25
  26 #include "gdk/gdk.h"
  27 #include "gtk/gtk.h"
  28 #include "gdk/gdkkeysyms.h"
  29
  30 //-----------------------------------------------------------------------------
  31 // idle system
  32 //-----------------------------------------------------------------------------
  33
  34 extern void wxapp_install_idle_handler();
  35 extern bool g_isIdle;
  36
  37 //-----------------------------------------------------------------------------
  38 // data
  39 //-----------------------------------------------------------------------------
  40
  41 extern bool       g_blockEventsOnDrag;
  42 extern wxCursor   g_globalCursor;
  43
  44 // ----------------------------------------------------------------------------
  45 // "insert_text" for GtkEntry
  46 // ----------------------------------------------------------------------------
  47
  48 static void
  49 gtk_insert_text_callback(GtkEditable *editable,
  50                          const gchar *new_text,
  51                          gint new_text_length,
  52                          gint *position,
  53                          wxTextCtrl *win)
  54 {
  55     if (g_isIdle)
  56         wxapp_install_idle_handler();
  57
  58     // we should only be called if we have a max len limit at all
  59     GtkEntry *entry = GTK_ENTRY (editable);
  60
  61     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  62
  63     // check that we don't overflow the max length limit
  64     //
  65     // FIXME: this doesn't work when we paste a string which is going to be
  66     //        truncated
  67     if ( entry->text_length == entry->text_max_length )
  68     {
  69         // we don't need to run the base class version at all
  70         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
  71
  72         // remember that the next changed signal is to be ignored to avoid
  73         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
  74         win->IgnoreNextTextUpdate();
  75
  76         // and generate the correct one ourselves
  77         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
  78         event.SetEventObject(win);
  79         event.SetString(win->GetValue());
  80         win->GetEventHandler()->ProcessEvent( event );
  81     }
  82 }
  83
  84 //-----------------------------------------------------------------------------
  85 //  "changed"
  86 //-----------------------------------------------------------------------------
  87
  88 static void
  89 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
  90 {
  91     if ( win->IgnoreTextUpdate() )
  92         return;
  93
  94     if (!win->m_hasVMT) return;
  95
  96     if (g_isIdle)
  97         wxapp_install_idle_handler();
  98
  99     win->SetModified();
 100     win->UpdateFontIfNeeded();
 101
 102     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 103     event.SetEventObject( win );
 104     event.SetString( win->GetValue() );
 105     win->GetEventHandler()->ProcessEvent( event );
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // "changed" from vertical scrollbar
 110 //-----------------------------------------------------------------------------
 111
 112 static void
 113 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 114 {
 115     if (!win->m_hasVMT) return;
 116
 117     if (g_isIdle)
 118         wxapp_install_idle_handler();
 119
 120     win->CalculateScrollbar();
 121 }
 122
 123 //-----------------------------------------------------------------------------
 124 //  wxTextCtrl
 125 //-----------------------------------------------------------------------------
 126
 127 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 128
 129 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 130     EVT_CHAR(wxTextCtrl::OnChar)
 131
 132     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 133     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 134     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 135     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 136     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 137
 138     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 139     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 140     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 141     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 142     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 143 END_EVENT_TABLE()
 144
 145 void wxTextCtrl::Init()
 146 {
 147     m_ignoreNextUpdate =
 148     m_modified = FALSE;
 149     m_updateFont = FALSE;
 150     m_text =
 151     m_vScrollbar = (GtkWidget *)NULL;
 152 }
 153
 154 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 155                         wxWindowID id,
 156                         const wxString &value,
 157                         const wxPoint &pos,
 158                         const wxSize &size,
 159                         long style,
 160                         const wxValidator& validator,
 161                         const wxString &name )
 162 {
 163     Init();
 164
 165     Create( parent, id, value, pos, size, style, validator, name );
 166 }
 167
 168 bool wxTextCtrl::Create( wxWindow *parent,
 169                          wxWindowID id,
 170                          const wxString &value,
 171                          const wxPoint &pos,
 172                          const wxSize &size,
 173                          long style,
 174                          const wxValidator& validator,
 175                          const wxString &name )
 176 {
 177     m_needParent = TRUE;
 178     m_acceptsFocus = TRUE;
 179
 180     if (!PreCreation( parent, pos, size ) ||
 181         !CreateBase( parent, id, pos, size, style, validator, name ))
 182     {
 183         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 184         return FALSE;
 185     }
 186
 187
 188     m_vScrollbarVisible = FALSE;
 189
 190     bool multi_line = (style & wxTE_MULTILINE) != 0;
 191     if (multi_line)
 192     {
 193 #if (GTK_MINOR_VERSION > 2)
 194         /* a multi-line edit control: create a vertical scrollbar by default and
 195            horizontal if requested */
 196         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 197 #else
 198         bool bHasHScrollbar = FALSE;
 199 #endif
 200
 201         /* create our control ... */
 202         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 203
 204         /* ... and put into the upper left hand corner of the table */
 205         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 206         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 207         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 208                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 209                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 210                        0, 0);
 211
 212         /* always wrap words */
 213         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 214
 215 #if (GTK_MINOR_VERSION > 2)
 216         /* put the horizontal scrollbar in the lower left hand corner */
 217         if (bHasHScrollbar)
 218         {
 219             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 220             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 221             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 222                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 223                        GTK_FILL,
 224                        0, 0);
 225             gtk_widget_show(hscrollbar);
 226
 227             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 228             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 229         }
 230 #endif
 231
 232         /* finally, put the vertical scrollbar in the upper right corner */
 233         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 234         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 235         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 236                      GTK_FILL,
 237                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 238                      0, 0);
 239     }
 240     else
 241     {
 242         /* a single-line text control: no need for scrollbars */
 243         m_widget =
 244           m_text = gtk_entry_new();
 245     }
 246
 247     m_parent->DoAddChild( this );
 248
 249     m_focusWidget = m_text;
 250
 251     PostCreation();
 252
 253     SetFont( parent->GetFont() );
 254
 255     wxSize size_best( DoGetBestSize() );
 256     wxSize new_size( size );
 257     if (new_size.x == -1)
 258         new_size.x = size_best.x;
 259     if (new_size.y == -1)
 260         new_size.y = size_best.y;
 261     if ((new_size.x != size.x) || (new_size.y != size.y))
 262         SetSize( new_size.x, new_size.y );
 263
 264     if (multi_line)
 265         gtk_widget_show(m_text);
 266
 267     if (multi_line)
 268     {
 269         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 270           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 271     }
 272
 273     if (!value.IsEmpty())
 274     {
 275         gint tmp = 0;
 276
 277 #if GTK_MINOR_VERSION == 0
 278         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 279         // gtk_editable_insert_text()
 280         gtk_widget_realize(m_text);
 281 #endif // GTK 1.0
 282
 283 #if wxUSE_UNICODE
 284         wxWX2MBbuf val = value.mbc_str();
 285         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 286 #else // !Unicode
 287         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 288 #endif // Unicode/!Unicode
 289
 290         if (multi_line)
 291         {
 292             /* bring editable's cursor uptodate. bug in GTK. */
 293
 294             GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 295         }
 296     }
 297
 298     if (style & wxTE_PASSWORD)
 299     {
 300         if (!multi_line)
 301             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 302     }
 303
 304     if (style & wxTE_READONLY)
 305     {
 306         if (!multi_line)
 307             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 308     }
 309     else
 310     {
 311         if (multi_line)
 312             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 313     }
 314
 315     /* we want to be notified about text changes */
 316     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 317       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 318
 319     /* we don't set a valid background colour, because the window
 320        manager should use a default one */
 321     m_backgroundColour = wxColour();
 322
 323     wxColour colFg = parent->GetForegroundColour();
 324     SetForegroundColour( colFg );
 325
 326     m_cursor = wxCursor( wxCURSOR_IBEAM );
 327
 328     // FIXME: is the bg colour correct here?
 329     wxTextAttr attrDef( colFg,
 330                         wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW),
 331                         parent->GetFont() );
 332     SetDefaultStyle( attrDef );
 333
 334     Show( TRUE );
 335
 336     return TRUE;
 337 }
 338
 339 void wxTextCtrl::CalculateScrollbar()
 340 {
 341     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 342
 343     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 344
 345     if (adj->upper - adj->page_size < 0.8)
 346     {
 347         if (m_vScrollbarVisible)
 348         {
 349             gtk_widget_hide( m_vScrollbar );
 350             m_vScrollbarVisible = FALSE;
 351         }
 352     }
 353     else
 354     {
 355         if (!m_vScrollbarVisible)
 356         {
 357             gtk_widget_show( m_vScrollbar );
 358             m_vScrollbarVisible = TRUE;
 359         }
 360     }
 361 }
 362
 363 wxString wxTextCtrl::GetValue() const
 364 {
 365     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 366
 367     wxString tmp;
 368     if (m_windowStyle & wxTE_MULTILINE)
 369     {
 370         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 371         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 372         tmp = wxString(text,*wxConvCurrent);
 373         g_free( text );
 374     }
 375     else
 376     {
 377         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 378     }
 379     return tmp;
 380 }
 381
 382 void wxTextCtrl::SetValue( const wxString &value )
 383 {
 384     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 385
 386     if (m_windowStyle & wxTE_MULTILINE)
 387     {
 388         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 389         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 390         len = 0;
 391 #if wxUSE_UNICODE
 392         wxWX2MBbuf tmpbuf = value.mbc_str();
 393         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 394 #else
 395         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 396 #endif
 397     }
 398     else
 399     {
 400         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 401     }
 402
 403     // GRG, Jun/2000: Changed this after a lot of discussion in
 404     //   the lists. wxWindows 2.2 will have a set of flags to
 405     //   customize this behaviour.
 406     SetInsertionPoint(0);
 407
 408     m_modified = FALSE;
 409 }
 410
 411 void wxTextCtrl::WriteText( const wxString &text )
 412 {
 413     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 414
 415     if ( text.empty() )
 416         return;
 417
 418 #if wxUSE_UNICODE
 419     wxWX2MBbuf buf = text.mbc_str();
 420     const char *txt = buf;
 421     size_t txtlen = strlen(buf);
 422 #else
 423     const char *txt = text;
 424     size_t txtlen = text.length();
 425 #endif
 426
 427     if ( m_windowStyle & wxTE_MULTILINE )
 428     {
 429         /* this moves the cursor pos to behind the inserted text */
 430         gint len = GTK_EDITABLE(m_text)->current_pos;
 431
 432         // if we have any special style, use it
 433         if ( !m_defaultStyle.IsDefault() )
 434         {
 435             GdkFont *font = m_defaultStyle.HasFont()
 436                                 ? m_defaultStyle.GetFont().GetInternalFont()
 437                                 : NULL;
 438
 439             GdkColor *colFg = m_defaultStyle.HasTextColour()
 440                                 ? m_defaultStyle.GetTextColour().GetColor()
 441                                 : NULL;
 442
 443             GdkColor *colBg = m_defaultStyle.HasBackgroundColour()
 444                                 ? m_defaultStyle.GetBackgroundColour().GetColor()
 445                                 : NULL;
 446
 447             gtk_text_insert( GTK_TEXT(m_text), font, colFg, colBg, txt, txtlen );
 448         }
 449         else // no style
 450         {
 451             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 452         }
 453
 454         /* bring editable's cursor uptodate. bug in GTK. */
 455         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 456     }
 457     else // single line
 458     {
 459         /* this moves the cursor pos to behind the inserted text */
 460         gint len = GTK_EDITABLE(m_text)->current_pos;
 461         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 462
 463         /* bring editable's cursor uptodate. bug in GTK. */
 464         GTK_EDITABLE(m_text)->current_pos += text.Len();
 465
 466         /* bring entry's cursor uptodate. bug in GTK. */
 467         gtk_entry_set_position( GTK_ENTRY(m_text), GTK_EDITABLE(m_text)->current_pos );
 468     }
 469 }
 470
 471 void wxTextCtrl::AppendText( const wxString &text )
 472 {
 473     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 474
 475     if ( text.empty() )
 476         return;
 477
 478 #if wxUSE_UNICODE
 479     wxWX2MBbuf buf = text.mbc_str();
 480     const char *txt = buf;
 481     size_t txtlen = strlen(buf);
 482 #else
 483     const char *txt = text;
 484     size_t txtlen = text.length();
 485 #endif
 486
 487     if (m_windowStyle & wxTE_MULTILINE)
 488     {
 489         if ( !m_defaultStyle.IsDefault() )
 490         {
 491             wxFont font = m_defaultStyle.HasFont() ? m_defaultStyle.GetFont()
 492                                                    : m_font;
 493             GdkFont *fnt = font.Ok() ? font.GetInternalFont() : NULL;
 494
 495             wxColour col = m_defaultStyle.HasTextColour()
 496                                 ? m_defaultStyle.GetTextColour()
 497                                 : m_foregroundColour;
 498             GdkColor *colFg = col.Ok() ? col.GetColor() : NULL;
 499
 500             col = m_defaultStyle.HasBackgroundColour()
 501                     ? m_defaultStyle.GetBackgroundColour()
 502                     : m_backgroundColour;
 503             GdkColor *colBg = col.Ok() ? col.GetColor() : NULL;
 504
 505             gtk_text_insert( GTK_TEXT(m_text), fnt, colFg, colBg, txt, txtlen );
 506         }
 507         else // no style
 508         {
 509             /* we'll insert at the last position */
 510             gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 511             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 512         }
 513
 514         /* bring editable's cursor uptodate. bug in GTK. */
 515         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 516     }
 517     else // single line
 518     {
 519         gtk_entry_append_text( GTK_ENTRY(m_text), txt );
 520     }
 521 }
 522
 523 wxString wxTextCtrl::GetLineText( long lineNo ) const
 524 {
 525   if (m_windowStyle & wxTE_MULTILINE)
 526   {
 527     gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 528     char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 529
 530     if (text)
 531     {
 532         wxString buf(wxT(""));
 533         long i;
 534         int currentLine = 0;
 535         for (i = 0; currentLine != lineNo && text[i]; i++ )
 536           if (text[i] == '\n')
 537             currentLine++;
 538         // Now get the text
 539         int j;
 540         for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 541             buf += text[i];
 542
 543         g_free( text );
 544         return buf;
 545     }
 546     else
 547       return wxEmptyString;
 548   }
 549   else
 550   {
 551     if (lineNo == 0) return GetValue();
 552     return wxEmptyString;
 553   }
 554 }
 555
 556 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 557 {
 558   /* If you implement this, don't forget to update the documentation!
 559    * (file docs/latex/wx/text.tex) */
 560     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 561 }
 562
 563 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 564 {
 565     if ( m_windowStyle & wxTE_MULTILINE )
 566     {
 567         wxString text = GetValue();
 568
 569         // cast to prevent warning. But pos really should've been unsigned.
 570         if( (unsigned long)pos > text.Len()  )
 571             return FALSE;
 572
 573         *x=0;   // First Col
 574         *y=0;   // First Line
 575
 576         const wxChar* stop = text.c_str() + pos;
 577         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 578         {
 579             if (*p == wxT('\n'))
 580             {
 581                 (*y)++;
 582                 *x=0;
 583             }
 584             else
 585                 (*x)++;
 586         }
 587     }
 588     else // single line control
 589     {
 590         if ( pos <= GTK_ENTRY(m_text)->text_length )
 591         {
 592             *y = 0;
 593             *x = pos;
 594         }
 595         else
 596         {
 597             // index out of bounds
 598             return FALSE;
 599         }
 600     }
 601
 602     return TRUE;
 603 }
 604
 605 long wxTextCtrl::XYToPosition(long x, long y ) const
 606 {
 607     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 608
 609     long pos=0;
 610     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 611
 612     pos += x;
 613     return pos;
 614 }
 615
 616 int wxTextCtrl::GetLineLength(long lineNo) const
 617 {
 618     wxString str = GetLineText (lineNo);
 619     return (int) str.Length();
 620 }
 621
 622 int wxTextCtrl::GetNumberOfLines() const
 623 {
 624     if (m_windowStyle & wxTE_MULTILINE)
 625     {
 626         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 627         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 628
 629         if (text)
 630         {
 631             int currentLine = 0;
 632             for (int i = 0; i < len; i++ )
 633             {
 634                 if (text[i] == '\n')
 635                     currentLine++;
 636             }
 637             g_free( text );
 638
 639             // currentLine is 0 based, add 1 to get number of lines
 640             return currentLine + 1;
 641         }
 642         else
 643         {
 644             return 0;
 645         }
 646     }
 647     else
 648     {
 649         return 1;
 650     }
 651 }
 652
 653 void wxTextCtrl::SetInsertionPoint( long pos )
 654 {
 655     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 656
 657     if (m_windowStyle & wxTE_MULTILINE)
 658     {
 659         /* seems to be broken in GTK 1.0.X:
 660            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 661
 662         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 663           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 664
 665         /* we fake a set_point by inserting and deleting. as the user
 666            isn't supposed to get to know about thos non-sense, we
 667            disconnect so that no events are sent to the user program. */
 668
 669         gint tmp = (gint)pos;
 670         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 671         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 672
 673         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 674           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 675
 676         /* bring editable's cursor uptodate. another bug in GTK. */
 677
 678         GTK_EDITABLE(m_text)->current_pos = gtk_text_get_point( GTK_TEXT(m_text) );
 679     }
 680     else
 681     {
 682         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 683
 684         /* bring editable's cursor uptodate. bug in GTK. */
 685
 686         GTK_EDITABLE(m_text)->current_pos = (guint32)pos;
 687     }
 688 }
 689
 690 void wxTextCtrl::SetInsertionPointEnd()
 691 {
 692     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 693
 694     if (m_windowStyle & wxTE_MULTILINE)
 695         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 696     else
 697         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 698 }
 699
 700 void wxTextCtrl::SetEditable( bool editable )
 701 {
 702     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 703
 704     if (m_windowStyle & wxTE_MULTILINE)
 705         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 706     else
 707         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 708 }
 709
 710 bool wxTextCtrl::Enable( bool enable )
 711 {
 712     if (!wxWindowBase::Enable(enable))
 713     {
 714         // nothing to do
 715         return FALSE;
 716     }
 717
 718     if (m_windowStyle & wxTE_MULTILINE)
 719     {
 720         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 721         OnParentEnable(enable);
 722     }
 723     else
 724     {
 725         gtk_widget_set_sensitive( m_text, enable );
 726     }
 727
 728     return TRUE;
 729 }
 730
 731 // wxGTK-specific: called recursively by Enable,
 732 // to give widgets an oppprtunity to correct their colours after they
 733 // have been changed by Enable
 734 void wxTextCtrl::OnParentEnable( bool enable )
 735 {
 736     // If we have a custom background colour, we use this colour in both
 737     // disabled and enabled mode, or we end up with a different colour under the
 738     // text.
 739     wxColour oldColour = GetBackgroundColour();
 740     if (oldColour.Ok())
 741     {
 742         // Need to set twice or it'll optimize the useful stuff out
 743         if (oldColour == * wxWHITE)
 744             SetBackgroundColour(*wxBLACK);
 745         else
 746             SetBackgroundColour(*wxWHITE);
 747         SetBackgroundColour(oldColour);
 748     }
 749 }
 750
 751 void wxTextCtrl::DiscardEdits()
 752 {
 753     m_modified = FALSE;
 754 }
 755
 756 // ----------------------------------------------------------------------------
 757 // max text length support
 758 // ----------------------------------------------------------------------------
 759
 760 void wxTextCtrl::IgnoreNextTextUpdate()
 761 {
 762     m_ignoreNextUpdate = TRUE;
 763 }
 764
 765 bool wxTextCtrl::IgnoreTextUpdate()
 766 {
 767     if ( m_ignoreNextUpdate )
 768     {
 769         m_ignoreNextUpdate = FALSE;
 770
 771         return TRUE;
 772     }
 773
 774     return FALSE;
 775 }
 776
 777 void wxTextCtrl::SetMaxLength(unsigned long len)
 778 {
 779     if ( !HasFlag(wxTE_MULTILINE) )
 780     {
 781         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 782
 783         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 784         // we had tried to enter more text than allowed by max text length and
 785         // the text wasn't really changed
 786         //
 787         // to detect this and generate TEXT_MAXLEN event instead of
 788         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 789         //
 790         // when max len is set to 0 we disconnect our handler as it means that
 791         // we shouldn't check anything any more
 792         if ( len )
 793         {
 794             gtk_signal_connect( GTK_OBJECT(m_text),
 795                                 "insert_text",
 796                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 797                                 (gpointer)this);
 798         }
 799         else // no checking
 800         {
 801             gtk_signal_disconnect_by_func
 802             (
 803                 GTK_OBJECT(m_text),
 804                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 805                 (gpointer)this
 806             );
 807         }
 808     }
 809 }
 810
 811 void wxTextCtrl::SetSelection( long from, long to )
 812 {
 813     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 814
 815     if ( (m_windowStyle & wxTE_MULTILINE) &&
 816          !GTK_TEXT(m_text)->line_start_cache )
 817     {
 818         // tell the programmer that it didn't work
 819         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 820         return;
 821     }
 822
 823     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 824 }
 825
 826 void wxTextCtrl::ShowPosition( long WXUNUSED(pos) )
 827 {
 828 //    SetInsertionPoint( pos );
 829 }
 830
 831 long wxTextCtrl::GetInsertionPoint() const
 832 {
 833     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 834
 835     return (long) GTK_EDITABLE(m_text)->current_pos;
 836 }
 837
 838 long wxTextCtrl::GetLastPosition() const
 839 {
 840     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 841
 842     int pos = 0;
 843     if (m_windowStyle & wxTE_MULTILINE)
 844         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 845     else
 846         pos = GTK_ENTRY(m_text)->text_length;
 847
 848     return (long)pos;
 849 }
 850
 851 void wxTextCtrl::Remove( long from, long to )
 852 {
 853     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 854
 855     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 856 }
 857
 858 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 859 {
 860     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 861
 862     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 863
 864     if (!value.IsEmpty())
 865     {
 866         gint pos = (gint)from;
 867 #if wxUSE_UNICODE
 868         wxWX2MBbuf buf = value.mbc_str();
 869         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 870 #else
 871         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 872 #endif
 873     }
 874 }
 875
 876 void wxTextCtrl::Cut()
 877 {
 878     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 879
 880 #if (GTK_MINOR_VERSION > 0)
 881     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) );
 882 #else
 883     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text), 0 );
 884 #endif
 885 }
 886
 887 void wxTextCtrl::Copy()
 888 {
 889     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 890
 891 #if (GTK_MINOR_VERSION > 0)
 892     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) );
 893 #else
 894     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text), 0 );
 895 #endif
 896 }
 897
 898 void wxTextCtrl::Paste()
 899 {
 900     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 901
 902 #if (GTK_MINOR_VERSION > 0)
 903     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) );
 904 #else
 905     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text), 0 );
 906 #endif
 907 }
 908
 909 // Undo/redo
 910 void wxTextCtrl::Undo()
 911 {
 912     // TODO
 913     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 914 }
 915
 916 void wxTextCtrl::Redo()
 917 {
 918     // TODO
 919     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 920 }
 921
 922 bool wxTextCtrl::CanUndo() const
 923 {
 924     // TODO
 925     wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 926     return FALSE;
 927 }
 928
 929 bool wxTextCtrl::CanRedo() const
 930 {
 931     // TODO
 932     wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 933     return FALSE;
 934 }
 935
 936 // If the return values from and to are the same, there is no
 937 // selection.
 938 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 939 {
 940     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 941
 942     long from, to;
 943     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 944     {
 945         from =
 946         to = GetInsertionPoint();
 947     }
 948     else // got selection
 949     {
 950         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 951         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 952
 953         if ( from > to )
 954         {
 955             // exchange them to be compatible with wxMSW
 956             long tmp = from;
 957             from = to;
 958             to = tmp;
 959         }
 960     }
 961
 962     if ( fromOut )
 963         *fromOut = from;
 964     if ( toOut )
 965         *toOut = to;
 966 }
 967
 968 bool wxTextCtrl::IsEditable() const
 969 {
 970     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 971
 972     return GTK_EDITABLE(m_text)->editable;
 973 }
 974
 975 bool wxTextCtrl::IsModified() const
 976 {
 977     return m_modified;
 978 }
 979
 980 void wxTextCtrl::Clear()
 981 {
 982     SetValue( wxT("") );
 983 }
 984
 985 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 986 {
 987     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 988
 989     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 990     {
 991         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 992         event.SetEventObject(this);
 993         event.SetString(GetValue());
 994         if (GetEventHandler()->ProcessEvent(event)) return;
 995     }
 996
 997     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 998     {
 999         wxWindow *top_frame = m_parent;
1000         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1001             top_frame = top_frame->GetParent();
1002         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1003
1004         if (window->default_widget)
1005         {
1006             gtk_widget_activate (window->default_widget);
1007             return;
1008         }
1009     }
1010
1011     key_event.Skip();
1012 }
1013
1014 GtkWidget* wxTextCtrl::GetConnectWidget()
1015 {
1016     return GTK_WIDGET(m_text);
1017 }
1018
1019 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1020 {
1021     if (m_windowStyle & wxTE_MULTILINE)
1022         return (window == GTK_TEXT(m_text)->text_area);
1023     else
1024         return (window == GTK_ENTRY(m_text)->text_area);
1025 }
1026
1027 // the font will change for subsequent text insertiongs
1028 bool wxTextCtrl::SetFont( const wxFont &font )
1029 {
1030     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1031
1032     if ( !wxWindowBase::SetFont(font) )
1033     {
1034         // font didn't change, nothing to do
1035         return FALSE;
1036     }
1037
1038     if ( m_windowStyle & wxTE_MULTILINE )
1039     {
1040         m_updateFont = TRUE;
1041
1042         m_defaultStyle.SetFont(font);
1043
1044         ChangeFontGlobally();
1045     }
1046
1047     return TRUE;
1048 }
1049
1050 void wxTextCtrl::ChangeFontGlobally()
1051 {
1052     // this method is very inefficient and hence should be called as rarely as
1053     // possible!
1054     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1055                   _T("shouldn't be called for single line controls") );
1056
1057     wxString value = GetValue();
1058     if ( !value.IsEmpty() )
1059     {
1060         m_updateFont = FALSE;
1061
1062         Clear();
1063         AppendText(value);
1064     }
1065 }
1066
1067 void wxTextCtrl::UpdateFontIfNeeded()
1068 {
1069     if ( m_updateFont )
1070         ChangeFontGlobally();
1071 }
1072
1073 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1074 {
1075     if ( !wxControl::SetForegroundColour(colour) )
1076         return FALSE;
1077
1078     // update default fg colour too
1079     m_defaultStyle.SetTextColour(colour);
1080
1081     return TRUE;
1082 }
1083
1084 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1085 {
1086     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1087
1088     if ( !wxControl::SetBackgroundColour( colour ) )
1089         return FALSE;
1090
1091     if (!m_widget->window)
1092         return FALSE;
1093
1094     wxColour sysbg = wxSystemSettings::GetSystemColour( wxSYS_COLOUR_BTNFACE );
1095     if (sysbg.Red() == colour.Red() &&
1096         sysbg.Green() == colour.Green() &&
1097         sysbg.Blue() == colour.Blue())
1098     {
1099         return FALSE; // FIXME or TRUE?
1100     }
1101
1102     if (!m_backgroundColour.Ok())
1103         return FALSE;
1104
1105     if (m_windowStyle & wxTE_MULTILINE)
1106     {
1107         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1108         if (!window)
1109             return FALSE;
1110         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1111         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1112         gdk_window_clear( window );
1113     }
1114
1115     // change active background color too
1116     m_defaultStyle.SetBackgroundColour( colour );
1117
1118     return TRUE;
1119 }
1120
1121 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr &style )
1122 {
1123     /* VERY dirty way to do that - removes the required text and re-adds it
1124        with styling (FIXME) */
1125     if ( m_windowStyle & wxTE_MULTILINE )
1126     {
1127         if ( style.IsDefault() )
1128         {
1129             // nothing to do
1130             return TRUE;
1131         }
1132
1133         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1134
1135         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1136                      _T("invalid range in wxTextCtrl::SetStyle") );
1137
1138         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1139         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1140         wxString tmp(text,*wxConvCurrent);
1141         g_free( text );
1142
1143         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1144         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1145
1146 #if wxUSE_UNICODE
1147         wxWX2MBbuf buf = tmp.mbc_str();
1148         const char *txt = buf;
1149         size_t txtlen = strlen(buf);
1150 #else
1151         const char *txt = tmp;
1152         size_t txtlen = tmp.length();
1153 #endif
1154
1155         GdkFont *font = style.HasFont()
1156                             ? style.GetFont().GetInternalFont()
1157                             : NULL;
1158
1159         GdkColor *colFg = style.HasTextColour()
1160                             ? style.GetTextColour().GetColor()
1161                             : NULL;
1162
1163         GdkColor *colBg = style.HasBackgroundColour()
1164                             ? style.GetBackgroundColour().GetColor()
1165                             : NULL;
1166
1167         gtk_text_insert( GTK_TEXT(m_text), font, colFg, colBg, txt, txtlen );
1168
1169         /* does not seem to help under GTK+ 1.2 !!!
1170         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1171         SetInsertionPoint( old_pos );
1172         return TRUE;
1173     }
1174     else // singe line
1175     {
1176         // cannot do this for GTK+'s Entry widget
1177         return FALSE;
1178     }
1179 }
1180
1181 void wxTextCtrl::ApplyWidgetStyle()
1182 {
1183     if (m_windowStyle & wxTE_MULTILINE)
1184     {
1185         // how ?
1186     }
1187     else
1188     {
1189         SetWidgetStyle();
1190         gtk_widget_set_style( m_text, m_widgetStyle );
1191     }
1192 }
1193
1194 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1195 {
1196     Cut();
1197 }
1198
1199 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1200 {
1201     Copy();
1202 }
1203
1204 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1205 {
1206     Paste();
1207 }
1208
1209 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1210 {
1211     Undo();
1212 }
1213
1214 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1215 {
1216     Redo();
1217 }
1218
1219 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1220 {
1221     event.Enable( CanCut() );
1222 }
1223
1224 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1225 {
1226     event.Enable( CanCopy() );
1227 }
1228
1229 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1230 {
1231     event.Enable( CanPaste() );
1232 }
1233
1234 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1235 {
1236     event.Enable( CanUndo() );
1237 }
1238
1239 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1240 {
1241     event.Enable( CanRedo() );
1242 }
1243
1244 void wxTextCtrl::OnInternalIdle()
1245 {
1246     wxCursor cursor = m_cursor;
1247     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1248
1249     if (cursor.Ok())
1250     {
1251         GdkWindow *window = (GdkWindow*) NULL;
1252         if (HasFlag(wxTE_MULTILINE))
1253             window = GTK_TEXT(m_text)->text_area;
1254         else
1255             window = GTK_ENTRY(m_text)->text_area;
1256
1257         if (window)
1258             gdk_window_set_cursor( window, cursor.GetCursor() );
1259
1260         if (!g_globalCursor.Ok())
1261             cursor = *wxSTANDARD_CURSOR;
1262
1263         window = m_widget->window;
1264         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1265             gdk_window_set_cursor( window, cursor.GetCursor() );
1266     }
1267
1268     UpdateWindowUI();
1269 }
1270
1271 wxSize wxTextCtrl::DoGetBestSize() const
1272 {
1273     // FIXME should be different for multi-line controls...
1274     wxSize ret( wxControl::DoGetBestSize() );
1275     return wxSize(80, ret.y);
1276 }
1277
1278 // ----------------------------------------------------------------------------
1279 // freeze/thaw
1280 // ----------------------------------------------------------------------------
1281
1282 void wxTextCtrl::Freeze()
1283 {
1284     if ( HasFlag(wxTE_MULTILINE) )
1285     {
1286         gtk_text_freeze(GTK_TEXT(m_text));
1287     }
1288 }
1289
1290 void wxTextCtrl::Thaw()
1291 {
1292     if ( HasFlag(wxTE_MULTILINE) )
1293     {
1294         GTK_TEXT(m_text)->vadj->value = 0.0;
1295
1296         gtk_text_thaw(GTK_TEXT(m_text));
1297     }
1298 }
1299
1300 // ----------------------------------------------------------------------------
1301 // scrolling
1302 // ----------------------------------------------------------------------------
1303
1304 GtkAdjustment *wxTextCtrl::GetVAdj() const
1305 {
1306     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1307 }
1308
1309 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1310 {
1311     float value = adj->value + diff;
1312
1313     if ( value < 0 )
1314         value = 0;
1315
1316     float upper = adj->upper - adj->page_size;
1317     if ( value > upper )
1318         value = upper;
1319
1320     // did we noticeably change the scroll position?
1321     if ( fabs(adj->value - value) < 0.2 )
1322     {
1323         // well, this is what Robert does in wxScrollBar, so it must be good...
1324         return FALSE;
1325     }
1326
1327     adj->value = value;
1328
1329     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1330
1331     return TRUE;
1332 }
1333
1334 bool wxTextCtrl::ScrollLines(int lines)
1335 {
1336     GtkAdjustment *adj = GetVAdj();
1337     if ( !adj )
1338         return FALSE;
1339
1340     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1341     static const int KEY_SCROLL_PIXELS = 10;
1342
1343     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1344 }
1345
1346 bool wxTextCtrl::ScrollPages(int pages)
1347 {
1348     GtkAdjustment *adj = GetVAdj();
1349     if ( !adj )
1350         return FALSE;
1351
1352     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1353 }
1354