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 // TODO: reimplement wxTextCtrl using GtkTextView
  27 #ifdef __WXGTK20__
  28     #define GTK_ENABLE_BROKEN       // need this to get GtkText at all
  29 #endif // __WXGTK20__
  30
  31 #include "wx/gtk/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern bool       g_blockEventsOnDrag;
  46 extern wxCursor   g_globalCursor;
  47
  48 // ----------------------------------------------------------------------------
  49 // helpers
  50 // ----------------------------------------------------------------------------
  51
  52 static void wxGtkTextInsert(GtkWidget *text,
  53                             const wxTextAttr& attr,
  54                             const char *txt,
  55                             size_t len)
  56 {
  57     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  58                                    : NULL;
  59
  60     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  61                                            : NULL;
  62
  63     GdkColor *colBg = attr.HasBackgroundColour()
  64                         ? attr.GetBackgroundColour().GetColor()
  65                         : NULL;
  66
  67     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  68 }
  69
  70 // ----------------------------------------------------------------------------
  71 // "insert_text" for GtkEntry
  72 // ----------------------------------------------------------------------------
  73
  74 static void
  75 gtk_insert_text_callback(GtkEditable *editable,
  76                          const gchar *new_text,
  77                          gint new_text_length,
  78                          gint *position,
  79                          wxTextCtrl *win)
  80 {
  81     if (g_isIdle)
  82         wxapp_install_idle_handler();
  83
  84     // we should only be called if we have a max len limit at all
  85     GtkEntry *entry = GTK_ENTRY (editable);
  86
  87     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  88
  89     // check that we don't overflow the max length limit
  90     //
  91     // FIXME: this doesn't work when we paste a string which is going to be
  92     //        truncated
  93     if ( entry->text_length == entry->text_max_length )
  94     {
  95         // we don't need to run the base class version at all
  96         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
  97
  98         // remember that the next changed signal is to be ignored to avoid
  99         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 100         win->IgnoreNextTextUpdate();
 101
 102         // and generate the correct one ourselves
 103         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 104         event.SetEventObject(win);
 105         event.SetString(win->GetValue());
 106         win->GetEventHandler()->ProcessEvent( event );
 107     }
 108 }
 109
 110 //-----------------------------------------------------------------------------
 111 //  "changed"
 112 //-----------------------------------------------------------------------------
 113
 114 static void
 115 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 116 {
 117     if ( win->IgnoreTextUpdate() )
 118         return;
 119
 120     if (!win->m_hasVMT) return;
 121
 122     if (g_isIdle)
 123         wxapp_install_idle_handler();
 124
 125     win->SetModified();
 126     win->UpdateFontIfNeeded();
 127
 128     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 129     event.SetEventObject( win );
 130     event.SetString( win->GetValue() );
 131     win->GetEventHandler()->ProcessEvent( event );
 132 }
 133
 134 //-----------------------------------------------------------------------------
 135 // "changed" from vertical scrollbar
 136 //-----------------------------------------------------------------------------
 137
 138 static void
 139 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 140 {
 141     if (!win->m_hasVMT) return;
 142
 143     if (g_isIdle)
 144         wxapp_install_idle_handler();
 145
 146     win->CalculateScrollbar();
 147 }
 148
 149 //-----------------------------------------------------------------------------
 150 //  wxTextCtrl
 151 //-----------------------------------------------------------------------------
 152
 153 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 154
 155 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 156     EVT_CHAR(wxTextCtrl::OnChar)
 157
 158     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 159     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 160     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 161     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 162     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 163
 164     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 165     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 166     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 167     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 168     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 169 END_EVENT_TABLE()
 170
 171 void wxTextCtrl::Init()
 172 {
 173     m_ignoreNextUpdate =
 174     m_modified = FALSE;
 175     m_updateFont = FALSE;
 176     m_text =
 177     m_vScrollbar = (GtkWidget *)NULL;
 178 }
 179
 180 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 181                         wxWindowID id,
 182                         const wxString &value,
 183                         const wxPoint &pos,
 184                         const wxSize &size,
 185                         long style,
 186                         const wxValidator& validator,
 187                         const wxString &name )
 188 {
 189     Init();
 190
 191     Create( parent, id, value, pos, size, style, validator, name );
 192 }
 193
 194 bool wxTextCtrl::Create( wxWindow *parent,
 195                          wxWindowID id,
 196                          const wxString &value,
 197                          const wxPoint &pos,
 198                          const wxSize &size,
 199                          long style,
 200                          const wxValidator& validator,
 201                          const wxString &name )
 202 {
 203     m_needParent = TRUE;
 204     m_acceptsFocus = TRUE;
 205
 206     if (!PreCreation( parent, pos, size ) ||
 207         !CreateBase( parent, id, pos, size, style, validator, name ))
 208     {
 209         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 210         return FALSE;
 211     }
 212
 213
 214     m_vScrollbarVisible = FALSE;
 215
 216     bool multi_line = (style & wxTE_MULTILINE) != 0;
 217     if (multi_line)
 218     {
 219 #ifdef __WXGTK13__
 220         /* a multi-line edit control: create a vertical scrollbar by default and
 221            horizontal if requested */
 222         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 223 #else
 224         bool bHasHScrollbar = FALSE;
 225 #endif
 226
 227         /* create our control ... */
 228         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 229
 230         /* ... and put into the upper left hand corner of the table */
 231         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 232         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 233         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 234                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 235                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 236                        0, 0);
 237
 238         /* always wrap words */
 239         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 240
 241 #ifdef __WXGTK13__
 242         /* put the horizontal scrollbar in the lower left hand corner */
 243         if (bHasHScrollbar)
 244         {
 245             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 246             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 247             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 248                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 249                        GTK_FILL,
 250                        0, 0);
 251             gtk_widget_show(hscrollbar);
 252
 253             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 254             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 255         }
 256 #endif
 257
 258         /* finally, put the vertical scrollbar in the upper right corner */
 259         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 260         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 261         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 262                      GTK_FILL,
 263                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 264                      0, 0);
 265     }
 266     else
 267     {
 268         /* a single-line text control: no need for scrollbars */
 269         m_widget =
 270           m_text = gtk_entry_new();
 271     }
 272
 273     m_parent->DoAddChild( this );
 274
 275     m_focusWidget = m_text;
 276
 277     PostCreation();
 278
 279     SetFont( parent->GetFont() );
 280
 281     wxSize size_best( DoGetBestSize() );
 282     wxSize new_size( size );
 283     if (new_size.x == -1)
 284         new_size.x = size_best.x;
 285     if (new_size.y == -1)
 286         new_size.y = size_best.y;
 287     if ((new_size.x != size.x) || (new_size.y != size.y))
 288         SetSize( new_size.x, new_size.y );
 289
 290     if (multi_line)
 291         gtk_widget_show(m_text);
 292
 293     if (multi_line)
 294     {
 295         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 296           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 297     }
 298
 299     if (!value.IsEmpty())
 300     {
 301         gint tmp = 0;
 302
 303 #if !GTK_CHECK_VERSION(1, 2, 0)
 304         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 305         // gtk_editable_insert_text()
 306         gtk_widget_realize(m_text);
 307 #endif // GTK 1.0
 308
 309 #if wxUSE_UNICODE
 310         wxWX2MBbuf val = value.mbc_str();
 311         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 312 #else // !Unicode
 313         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 314 #endif // Unicode/!Unicode
 315
 316         if (multi_line)
 317         {
 318             /* bring editable's cursor uptodate. bug in GTK. */
 319             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 320         }
 321     }
 322
 323     if (style & wxTE_PASSWORD)
 324     {
 325         if (!multi_line)
 326             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 327     }
 328
 329     if (style & wxTE_READONLY)
 330     {
 331         if (!multi_line)
 332             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 333     }
 334     else
 335     {
 336         if (multi_line)
 337             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 338     }
 339
 340     /* we want to be notified about text changes */
 341     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 342       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 343
 344     /* we don't set a valid background colour, because the window
 345        manager should use a default one */
 346     m_backgroundColour = wxColour();
 347
 348     wxColour colFg = parent->GetForegroundColour();
 349     SetForegroundColour( colFg );
 350
 351     m_cursor = wxCursor( wxCURSOR_IBEAM );
 352
 353     wxTextAttr attrDef( colFg, m_backgroundColour, parent->GetFont() );
 354     SetDefaultStyle( attrDef );
 355
 356     Show( TRUE );
 357
 358     return TRUE;
 359 }
 360
 361 void wxTextCtrl::CalculateScrollbar()
 362 {
 363     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 364
 365     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 366
 367     if (adj->upper - adj->page_size < 0.8)
 368     {
 369         if (m_vScrollbarVisible)
 370         {
 371             gtk_widget_hide( m_vScrollbar );
 372             m_vScrollbarVisible = FALSE;
 373         }
 374     }
 375     else
 376     {
 377         if (!m_vScrollbarVisible)
 378         {
 379             gtk_widget_show( m_vScrollbar );
 380             m_vScrollbarVisible = TRUE;
 381         }
 382     }
 383 }
 384
 385 wxString wxTextCtrl::GetValue() const
 386 {
 387     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 388
 389     wxString tmp;
 390     if (m_windowStyle & wxTE_MULTILINE)
 391     {
 392         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 393         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 394         tmp = wxString(text,*wxConvCurrent);
 395         g_free( text );
 396     }
 397     else
 398     {
 399         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 400     }
 401     return tmp;
 402 }
 403
 404 void wxTextCtrl::SetValue( const wxString &value )
 405 {
 406     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 407
 408     if (m_windowStyle & wxTE_MULTILINE)
 409     {
 410         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 411         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 412         len = 0;
 413 #if wxUSE_UNICODE
 414         wxWX2MBbuf tmpbuf = value.mbc_str();
 415         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 416 #else
 417         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 418 #endif
 419     }
 420     else
 421     {
 422         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 423     }
 424
 425     // GRG, Jun/2000: Changed this after a lot of discussion in
 426     //   the lists. wxWindows 2.2 will have a set of flags to
 427     //   customize this behaviour.
 428     SetInsertionPoint(0);
 429
 430     m_modified = FALSE;
 431 }
 432
 433 void wxTextCtrl::WriteText( const wxString &text )
 434 {
 435     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 436
 437     if ( text.empty() )
 438         return;
 439
 440 #if wxUSE_UNICODE
 441     wxWX2MBbuf buf = text.mbc_str();
 442     const char *txt = buf;
 443     size_t txtlen = strlen(buf);
 444 #else
 445     const char *txt = text;
 446     size_t txtlen = text.length();
 447 #endif
 448
 449     if ( m_windowStyle & wxTE_MULTILINE )
 450     {
 451         // After cursor movements, gtk_text_get_point() is wrong by one.
 452         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 453
 454         // if we have any special style, use it
 455         if ( !m_defaultStyle.IsDefault() )
 456         {
 457             GetInsertionPoint();
 458
 459             wxGtkTextInsert(m_text, m_defaultStyle, txt, txtlen);
 460         }
 461         else // no style
 462         {
 463             gint len = GET_EDITABLE_POS(m_text);
 464             gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 465         }
 466
 467         // Bring editable's cursor back uptodate.
 468         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 469     }
 470     else // single line
 471     {
 472         // This moves the cursor pos to behind the inserted text.
 473         gint len = GET_EDITABLE_POS(m_text);
 474         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 475
 476         // Bring editable's cursor uptodate.
 477         len += text.Len();
 478
 479         // Bring entry's cursor uptodate.
 480         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 481     }
 482
 483     m_modified = TRUE;
 484 }
 485
 486 void wxTextCtrl::AppendText( const wxString &text )
 487 {
 488     SetInsertionPointEnd();
 489     WriteText( text );
 490 }
 491
 492 wxString wxTextCtrl::GetLineText( long lineNo ) const
 493 {
 494     if (m_windowStyle & wxTE_MULTILINE)
 495     {
 496         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 497         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 498
 499         if (text)
 500         {
 501             wxString buf(wxT(""));
 502             long i;
 503             int currentLine = 0;
 504             for (i = 0; currentLine != lineNo && text[i]; i++ )
 505                 if (text[i] == '\n')
 506             currentLine++;
 507             // Now get the text
 508             int j;
 509             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 510                 buf += text[i];
 511
 512             g_free( text );
 513             return buf;
 514         }
 515         else
 516         {
 517             return wxEmptyString;
 518         }
 519     }
 520     else
 521     {
 522         if (lineNo == 0) return GetValue();
 523         return wxEmptyString;
 524     }
 525 }
 526
 527 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 528 {
 529   /* If you implement this, don't forget to update the documentation!
 530    * (file docs/latex/wx/text.tex) */
 531     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 532 }
 533
 534 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 535 {
 536     if ( m_windowStyle & wxTE_MULTILINE )
 537     {
 538         wxString text = GetValue();
 539
 540         // cast to prevent warning. But pos really should've been unsigned.
 541         if( (unsigned long)pos > text.Len()  )
 542             return FALSE;
 543
 544         *x=0;   // First Col
 545         *y=0;   // First Line
 546
 547         const wxChar* stop = text.c_str() + pos;
 548         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 549         {
 550             if (*p == wxT('\n'))
 551             {
 552                 (*y)++;
 553                 *x=0;
 554             }
 555             else
 556                 (*x)++;
 557         }
 558     }
 559     else // single line control
 560     {
 561         if ( pos <= GTK_ENTRY(m_text)->text_length )
 562         {
 563             *y = 0;
 564             *x = pos;
 565         }
 566         else
 567         {
 568             // index out of bounds
 569             return FALSE;
 570         }
 571     }
 572
 573     return TRUE;
 574 }
 575
 576 long wxTextCtrl::XYToPosition(long x, long y ) const
 577 {
 578     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 579
 580     long pos=0;
 581     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 582
 583     pos += x;
 584     return pos;
 585 }
 586
 587 int wxTextCtrl::GetLineLength(long lineNo) const
 588 {
 589     wxString str = GetLineText (lineNo);
 590     return (int) str.Length();
 591 }
 592
 593 int wxTextCtrl::GetNumberOfLines() const
 594 {
 595     if (m_windowStyle & wxTE_MULTILINE)
 596     {
 597         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 598         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 599
 600         if (text)
 601         {
 602             int currentLine = 0;
 603             for (int i = 0; i < len; i++ )
 604             {
 605                 if (text[i] == '\n')
 606                     currentLine++;
 607             }
 608             g_free( text );
 609
 610             // currentLine is 0 based, add 1 to get number of lines
 611             return currentLine + 1;
 612         }
 613         else
 614         {
 615             return 0;
 616         }
 617     }
 618     else
 619     {
 620         return 1;
 621     }
 622 }
 623
 624 void wxTextCtrl::SetInsertionPoint( long pos )
 625 {
 626     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 627
 628     if (m_windowStyle & wxTE_MULTILINE)
 629     {
 630         /* seems to be broken in GTK 1.0.X:
 631            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 632
 633         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 634           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 635
 636         /* we fake a set_point by inserting and deleting. as the user
 637            isn't supposed to get to know about thos non-sense, we
 638            disconnect so that no events are sent to the user program. */
 639
 640         gint tmp = (gint)pos;
 641         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 642         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 643
 644         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 645           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 646
 647         /* bring editable's cursor uptodate. another bug in GTK. */
 648
 649         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 650     }
 651     else
 652     {
 653         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 654
 655         /* bring editable's cursor uptodate. bug in GTK. */
 656
 657         SET_EDITABLE_POS(m_text, (guint32)pos);
 658     }
 659 }
 660
 661 void wxTextCtrl::SetInsertionPointEnd()
 662 {
 663     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 664
 665     if (m_windowStyle & wxTE_MULTILINE)
 666         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 667     else
 668         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 669 }
 670
 671 void wxTextCtrl::SetEditable( bool editable )
 672 {
 673     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 674
 675     if (m_windowStyle & wxTE_MULTILINE)
 676         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 677     else
 678         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 679 }
 680
 681 bool wxTextCtrl::Enable( bool enable )
 682 {
 683     if (!wxWindowBase::Enable(enable))
 684     {
 685         // nothing to do
 686         return FALSE;
 687     }
 688
 689     if (m_windowStyle & wxTE_MULTILINE)
 690     {
 691         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 692         OnParentEnable(enable);
 693     }
 694     else
 695     {
 696         gtk_widget_set_sensitive( m_text, enable );
 697     }
 698
 699     return TRUE;
 700 }
 701
 702 // wxGTK-specific: called recursively by Enable,
 703 // to give widgets an oppprtunity to correct their colours after they
 704 // have been changed by Enable
 705 void wxTextCtrl::OnParentEnable( bool enable )
 706 {
 707     // If we have a custom background colour, we use this colour in both
 708     // disabled and enabled mode, or we end up with a different colour under the
 709     // text.
 710     wxColour oldColour = GetBackgroundColour();
 711     if (oldColour.Ok())
 712     {
 713         // Need to set twice or it'll optimize the useful stuff out
 714         if (oldColour == * wxWHITE)
 715             SetBackgroundColour(*wxBLACK);
 716         else
 717             SetBackgroundColour(*wxWHITE);
 718         SetBackgroundColour(oldColour);
 719     }
 720 }
 721
 722 void wxTextCtrl::DiscardEdits()
 723 {
 724     m_modified = FALSE;
 725 }
 726
 727 // ----------------------------------------------------------------------------
 728 // max text length support
 729 // ----------------------------------------------------------------------------
 730
 731 void wxTextCtrl::IgnoreNextTextUpdate()
 732 {
 733     m_ignoreNextUpdate = TRUE;
 734 }
 735
 736 bool wxTextCtrl::IgnoreTextUpdate()
 737 {
 738     if ( m_ignoreNextUpdate )
 739     {
 740         m_ignoreNextUpdate = FALSE;
 741
 742         return TRUE;
 743     }
 744
 745     return FALSE;
 746 }
 747
 748 void wxTextCtrl::SetMaxLength(unsigned long len)
 749 {
 750     if ( !HasFlag(wxTE_MULTILINE) )
 751     {
 752         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 753
 754         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 755         // we had tried to enter more text than allowed by max text length and
 756         // the text wasn't really changed
 757         //
 758         // to detect this and generate TEXT_MAXLEN event instead of
 759         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 760         //
 761         // when max len is set to 0 we disconnect our handler as it means that
 762         // we shouldn't check anything any more
 763         if ( len )
 764         {
 765             gtk_signal_connect( GTK_OBJECT(m_text),
 766                                 "insert_text",
 767                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 768                                 (gpointer)this);
 769         }
 770         else // no checking
 771         {
 772             gtk_signal_disconnect_by_func
 773             (
 774                 GTK_OBJECT(m_text),
 775                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 776                 (gpointer)this
 777             );
 778         }
 779     }
 780 }
 781
 782 void wxTextCtrl::SetSelection( long from, long to )
 783 {
 784     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 785
 786     if ( (m_windowStyle & wxTE_MULTILINE) &&
 787          !GTK_TEXT(m_text)->line_start_cache )
 788     {
 789         // tell the programmer that it didn't work
 790         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 791         return;
 792     }
 793
 794     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 795 }
 796
 797 void wxTextCtrl::ShowPosition( long pos )
 798 {
 799     if (m_windowStyle & wxTE_MULTILINE)
 800     {
 801         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 802         float totalLines =  (float) GetNumberOfLines();
 803         long posX;
 804         long posY;
 805         PositionToXY(pos, &posX, &posY);
 806         float posLine = (float) posY;
 807         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 808         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 809     }
 810 }
 811
 812 long wxTextCtrl::GetInsertionPoint() const
 813 {
 814     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 815
 816     return (long) GET_EDITABLE_POS(m_text);
 817 }
 818
 819 long wxTextCtrl::GetLastPosition() const
 820 {
 821     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 822
 823     int pos = 0;
 824     if (m_windowStyle & wxTE_MULTILINE)
 825         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 826     else
 827         pos = GTK_ENTRY(m_text)->text_length;
 828
 829     return (long)pos;
 830 }
 831
 832 void wxTextCtrl::Remove( long from, long to )
 833 {
 834     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 835
 836     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 837 }
 838
 839 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 840 {
 841     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 842
 843     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 844
 845     if (!value.IsEmpty())
 846     {
 847         gint pos = (gint)from;
 848 #if wxUSE_UNICODE
 849         wxWX2MBbuf buf = value.mbc_str();
 850         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 851 #else
 852         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 853 #endif
 854     }
 855 }
 856
 857 void wxTextCtrl::Cut()
 858 {
 859     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 860
 861     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 862 }
 863
 864 void wxTextCtrl::Copy()
 865 {
 866     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 867
 868     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 869 }
 870
 871 void wxTextCtrl::Paste()
 872 {
 873     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 874
 875     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 876 }
 877
 878 // Undo/redo
 879 void wxTextCtrl::Undo()
 880 {
 881     // TODO
 882     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 883 }
 884
 885 void wxTextCtrl::Redo()
 886 {
 887     // TODO
 888     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 889 }
 890
 891 bool wxTextCtrl::CanUndo() const
 892 {
 893     // TODO
 894     wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 895     return FALSE;
 896 }
 897
 898 bool wxTextCtrl::CanRedo() const
 899 {
 900     // TODO
 901     wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 902     return FALSE;
 903 }
 904
 905 // If the return values from and to are the same, there is no
 906 // selection.
 907 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 908 {
 909     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 910
 911     gint from, to;
 912 #ifdef __WXGTK20__
 913     if ( !gtk_editable_get_selection_bounds(GTK_EDITABLE(m_text), &from, &to) )
 914 #else
 915     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 916 #endif
 917     {
 918         from =
 919         to = GetInsertionPoint();
 920     }
 921     else // got selection
 922     {
 923 #ifndef __WXGTK20__
 924         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 925         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 926 #endif
 927
 928         if ( from > to )
 929         {
 930             // exchange them to be compatible with wxMSW
 931             gint tmp = from;
 932             from = to;
 933             to = tmp;
 934         }
 935     }
 936
 937     if ( fromOut )
 938         *fromOut = from;
 939     if ( toOut )
 940         *toOut = to;
 941 }
 942
 943 bool wxTextCtrl::IsEditable() const
 944 {
 945     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 946
 947 #ifdef __WXGTK20__
 948     return gtk_editable_get_editable(GTK_EDITABLE(m_text));
 949 #else
 950     return GTK_EDITABLE(m_text)->editable;
 951 #endif
 952 }
 953
 954 bool wxTextCtrl::IsModified() const
 955 {
 956     return m_modified;
 957 }
 958
 959 void wxTextCtrl::Clear()
 960 {
 961     SetValue( wxT("") );
 962 }
 963
 964 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 965 {
 966     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 967
 968     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 969     {
 970         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 971         event.SetEventObject(this);
 972         event.SetString(GetValue());
 973         if (GetEventHandler()->ProcessEvent(event)) return;
 974     }
 975
 976     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 977     {
 978         // This will invoke the dialog default action, such
 979         // as the clicking the default button.
 980
 981         wxWindow *top_frame = m_parent;
 982         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 983             top_frame = top_frame->GetParent();
 984
 985         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 986         {
 987             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 988
 989             if (window->default_widget)
 990             {
 991                 gtk_widget_activate (window->default_widget);
 992                 return;
 993             }
 994         }
 995     }
 996
 997     key_event.Skip();
 998 }
 999
1000 GtkWidget* wxTextCtrl::GetConnectWidget()
1001 {
1002     return GTK_WIDGET(m_text);
1003 }
1004
1005 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1006 {
1007     if (m_windowStyle & wxTE_MULTILINE)
1008         return (window == GTK_TEXT(m_text)->text_area);
1009     else
1010         return (window == GTK_ENTRY(m_text)->text_area);
1011 }
1012
1013 // the font will change for subsequent text insertiongs
1014 bool wxTextCtrl::SetFont( const wxFont &font )
1015 {
1016     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1017
1018     if ( !wxTextCtrlBase::SetFont(font) )
1019     {
1020         // font didn't change, nothing to do
1021         return FALSE;
1022     }
1023
1024     if ( m_windowStyle & wxTE_MULTILINE )
1025     {
1026         m_updateFont = TRUE;
1027
1028         m_defaultStyle.SetFont(font);
1029
1030         ChangeFontGlobally();
1031     }
1032
1033     return TRUE;
1034 }
1035
1036 void wxTextCtrl::ChangeFontGlobally()
1037 {
1038     // this method is very inefficient and hence should be called as rarely as
1039     // possible!
1040     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1041                   _T("shouldn't be called for single line controls") );
1042
1043     wxString value = GetValue();
1044     if ( !value.IsEmpty() )
1045     {
1046         m_updateFont = FALSE;
1047
1048         Clear();
1049         AppendText(value);
1050     }
1051 }
1052
1053 void wxTextCtrl::UpdateFontIfNeeded()
1054 {
1055     if ( m_updateFont )
1056         ChangeFontGlobally();
1057 }
1058
1059 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1060 {
1061     if ( !wxControl::SetForegroundColour(colour) )
1062         return FALSE;
1063
1064     // update default fg colour too
1065     m_defaultStyle.SetTextColour(colour);
1066
1067     return TRUE;
1068 }
1069
1070 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1071 {
1072     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1073
1074     if ( !wxControl::SetBackgroundColour( colour ) )
1075         return FALSE;
1076
1077     if (!m_widget->window)
1078         return FALSE;
1079
1080     wxColour sysbg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
1081     if (sysbg.Red() == colour.Red() &&
1082         sysbg.Green() == colour.Green() &&
1083         sysbg.Blue() == colour.Blue())
1084     {
1085         return FALSE; // FIXME or TRUE?
1086     }
1087
1088     if (!m_backgroundColour.Ok())
1089         return FALSE;
1090
1091     if (m_windowStyle & wxTE_MULTILINE)
1092     {
1093         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1094         if (!window)
1095             return FALSE;
1096         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1097         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1098         gdk_window_clear( window );
1099     }
1100
1101     // change active background color too
1102     m_defaultStyle.SetBackgroundColour( colour );
1103
1104     return TRUE;
1105 }
1106
1107 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1108 {
1109     /* VERY dirty way to do that - removes the required text and re-adds it
1110        with styling (FIXME) */
1111     if ( m_windowStyle & wxTE_MULTILINE )
1112     {
1113         if ( style.IsDefault() )
1114         {
1115             // nothing to do
1116             return TRUE;
1117         }
1118
1119         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1120
1121         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1122                      _T("invalid range in wxTextCtrl::SetStyle") );
1123
1124         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1125         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1126         wxString tmp(text,*wxConvCurrent);
1127         g_free( text );
1128
1129         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1130         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1131
1132 #if wxUSE_UNICODE
1133         wxWX2MBbuf buf = tmp.mbc_str();
1134         const char *txt = buf;
1135         size_t txtlen = strlen(buf);
1136 #else
1137         const char *txt = tmp;
1138         size_t txtlen = tmp.length();
1139 #endif
1140
1141         // use the attributes from style which are set in it and fall back
1142         // first to the default style and then to the text control default
1143         // colours for the others
1144         wxGtkTextInsert(m_text,
1145                         wxTextAttr::Combine(style, m_defaultStyle, this),
1146                         txt,
1147                         txtlen);
1148
1149         /* does not seem to help under GTK+ 1.2 !!!
1150         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1151         SetInsertionPoint( old_pos );
1152         return TRUE;
1153     }
1154     else // singe line
1155     {
1156         // cannot do this for GTK+'s Entry widget
1157         return FALSE;
1158     }
1159 }
1160
1161 void wxTextCtrl::ApplyWidgetStyle()
1162 {
1163     if (m_windowStyle & wxTE_MULTILINE)
1164     {
1165         // how ?
1166     }
1167     else
1168     {
1169         SetWidgetStyle();
1170         gtk_widget_set_style( m_text, m_widgetStyle );
1171     }
1172 }
1173
1174 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1175 {
1176     Cut();
1177 }
1178
1179 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1180 {
1181     Copy();
1182 }
1183
1184 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1185 {
1186     Paste();
1187 }
1188
1189 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1190 {
1191     Undo();
1192 }
1193
1194 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1195 {
1196     Redo();
1197 }
1198
1199 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1200 {
1201     event.Enable( CanCut() );
1202 }
1203
1204 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1205 {
1206     event.Enable( CanCopy() );
1207 }
1208
1209 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1210 {
1211     event.Enable( CanPaste() );
1212 }
1213
1214 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1215 {
1216     event.Enable( CanUndo() );
1217 }
1218
1219 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1220 {
1221     event.Enable( CanRedo() );
1222 }
1223
1224 void wxTextCtrl::OnInternalIdle()
1225 {
1226     wxCursor cursor = m_cursor;
1227     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1228
1229     if (cursor.Ok())
1230     {
1231         GdkWindow *window = (GdkWindow*) NULL;
1232         if (HasFlag(wxTE_MULTILINE))
1233             window = GTK_TEXT(m_text)->text_area;
1234         else
1235             window = GTK_ENTRY(m_text)->text_area;
1236
1237         if (window)
1238             gdk_window_set_cursor( window, cursor.GetCursor() );
1239
1240         if (!g_globalCursor.Ok())
1241             cursor = *wxSTANDARD_CURSOR;
1242
1243         window = m_widget->window;
1244         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1245             gdk_window_set_cursor( window, cursor.GetCursor() );
1246     }
1247
1248     UpdateWindowUI();
1249 }
1250
1251 wxSize wxTextCtrl::DoGetBestSize() const
1252 {
1253     // FIXME should be different for multi-line controls...
1254     wxSize ret( wxControl::DoGetBestSize() );
1255     return wxSize(80, ret.y);
1256 }
1257
1258 // ----------------------------------------------------------------------------
1259 // freeze/thaw
1260 // ----------------------------------------------------------------------------
1261
1262 void wxTextCtrl::Freeze()
1263 {
1264     if ( HasFlag(wxTE_MULTILINE) )
1265     {
1266         gtk_text_freeze(GTK_TEXT(m_text));
1267     }
1268 }
1269
1270 void wxTextCtrl::Thaw()
1271 {
1272     if ( HasFlag(wxTE_MULTILINE) )
1273     {
1274         GTK_TEXT(m_text)->vadj->value = 0.0;
1275
1276         gtk_text_thaw(GTK_TEXT(m_text));
1277     }
1278 }
1279
1280 // ----------------------------------------------------------------------------
1281 // scrolling
1282 // ----------------------------------------------------------------------------
1283
1284 GtkAdjustment *wxTextCtrl::GetVAdj() const
1285 {
1286     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1287 }
1288
1289 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1290 {
1291     float value = adj->value + diff;
1292
1293     if ( value < 0 )
1294         value = 0;
1295
1296     float upper = adj->upper - adj->page_size;
1297     if ( value > upper )
1298         value = upper;
1299
1300     // did we noticeably change the scroll position?
1301     if ( fabs(adj->value - value) < 0.2 )
1302     {
1303         // well, this is what Robert does in wxScrollBar, so it must be good...
1304         return FALSE;
1305     }
1306
1307     adj->value = value;
1308
1309     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1310
1311     return TRUE;
1312 }
1313
1314 bool wxTextCtrl::ScrollLines(int lines)
1315 {
1316     GtkAdjustment *adj = GetVAdj();
1317     if ( !adj )
1318         return FALSE;
1319
1320     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1321     static const int KEY_SCROLL_PIXELS = 10;
1322
1323     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1324 }
1325
1326 bool wxTextCtrl::ScrollPages(int pages)
1327 {
1328     GtkAdjustment *adj = GetVAdj();
1329     if ( !adj )
1330         return FALSE;
1331
1332     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1333 }
1334