src/gtk1/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 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/textctrl.h"
  14 #include "wx/utils.h"
  15 #include "wx/intl.h"
  16 #include "wx/log.h"
  17 #include "wx/math.h"
  18 #include "wx/settings.h"
  19 #include "wx/panel.h"
  20 #include "wx/strconv.h"
  21 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  22
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <ctype.h>
  26 #include "wx/math.h"
  27
  28 #include "wx/gtk1/private.h"
  29 #include <gdk/gdkkeysyms.h>
  30
  31 //-----------------------------------------------------------------------------
  32 // idle system
  33 //-----------------------------------------------------------------------------
  34
  35 extern void wxapp_install_idle_handler();
  36 extern bool g_isIdle;
  37
  38 //-----------------------------------------------------------------------------
  39 // data
  40 //-----------------------------------------------------------------------------
  41
  42 extern wxCursor   g_globalCursor;
  43 extern wxWindowGTK *g_delayedFocus;
  44
  45 // ----------------------------------------------------------------------------
  46 // helpers
  47 // ----------------------------------------------------------------------------
  48
  49 extern "C" {
  50 static void wxGtkTextInsert(GtkWidget *text,
  51                             const wxTextAttr& attr,
  52                             const char *txt,
  53                             size_t len)
  54 {
  55     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  56                                    : NULL;
  57
  58     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  59                                            : NULL;
  60
  61     GdkColor *colBg = attr.HasBackgroundColour()
  62                         ? attr.GetBackgroundColour().GetColor()
  63                         : NULL;
  64
  65     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  66 }
  67 }
  68
  69 // ----------------------------------------------------------------------------
  70 // "insert_text" for GtkEntry
  71 // ----------------------------------------------------------------------------
  72
  73 extern "C" {
  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 //-----------------------------------------------------------------------------
 112 //  "changed"
 113 //-----------------------------------------------------------------------------
 114
 115 extern "C" {
 116 static void
 117 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 118 {
 119     if ( win->IgnoreTextUpdate() )
 120         return;
 121
 122     if (!win->m_hasVMT) return;
 123
 124     if (g_isIdle)
 125         wxapp_install_idle_handler();
 126
 127     win->SetModified();
 128     win->UpdateFontIfNeeded();
 129
 130     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 131     event.SetEventObject( win );
 132     win->GetEventHandler()->ProcessEvent( event );
 133 }
 134 }
 135
 136 //-----------------------------------------------------------------------------
 137 // "changed" from vertical scrollbar
 138 //-----------------------------------------------------------------------------
 139
 140 extern "C" {
 141 static void
 142 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 143 {
 144     if (!win->m_hasVMT) return;
 145
 146     if (g_isIdle)
 147         wxapp_install_idle_handler();
 148
 149     win->CalculateScrollbar();
 150 }
 151 }
 152
 153 // ----------------------------------------------------------------------------
 154 // redraw callback for multiline text
 155 // ----------------------------------------------------------------------------
 156
 157 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 158 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 159 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 160 // don't do anything if we're inside wxYield()
 161
 162 extern bool wxIsInsideYield;
 163
 164 extern "C" {
 165     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 166 }
 167
 168 static GtkDrawCallback gs_gtk_text_draw = NULL;
 169
 170 extern "C" {
 171 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 172 {
 173     if ( !wxIsInsideYield )
 174     {
 175         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 176                      _T("infinite recursion in wxgtk_text_draw aborted") );
 177
 178         gs_gtk_text_draw(widget, rect);
 179     }
 180 }
 181 }
 182
 183 //-----------------------------------------------------------------------------
 184 //  wxTextCtrl
 185 //-----------------------------------------------------------------------------
 186
 187 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 188
 189 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 190     EVT_CHAR(wxTextCtrl::OnChar)
 191
 192     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 193     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 194     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 195     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 196     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 197
 198     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 199     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 200     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 201     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 202     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 203 END_EVENT_TABLE()
 204
 205 void wxTextCtrl::Init()
 206 {
 207     m_ignoreNextUpdate =
 208     m_modified = false;
 209     SetUpdateFont(false);
 210     m_text =
 211     m_vScrollbar = (GtkWidget *)NULL;
 212 }
 213
 214 wxTextCtrl::~wxTextCtrl()
 215 {
 216 }
 217
 218 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 219                         wxWindowID id,
 220                         const wxString &value,
 221                         const wxPoint &pos,
 222                         const wxSize &size,
 223                         long style,
 224                         const wxValidator& validator,
 225                         const wxString &name )
 226 {
 227     Init();
 228
 229     Create( parent, id, value, pos, size, style, validator, name );
 230 }
 231
 232 bool wxTextCtrl::Create( wxWindow *parent,
 233                          wxWindowID id,
 234                          const wxString &value,
 235                          const wxPoint &pos,
 236                          const wxSize &size,
 237                          long style,
 238                          const wxValidator& validator,
 239                          const wxString &name )
 240 {
 241     m_needParent = true;
 242     m_acceptsFocus = true;
 243
 244     if (!PreCreation( parent, pos, size ) ||
 245         !CreateBase( parent, id, pos, size, style, validator, name ))
 246     {
 247         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 248         return false;
 249     }
 250
 251
 252     m_vScrollbarVisible = false;
 253
 254     bool multi_line = (style & wxTE_MULTILINE) != 0;
 255
 256     if (multi_line)
 257     {
 258         // create our control ...
 259         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 260
 261         // ... and put into the upper left hand corner of the table
 262         bool bHasHScrollbar = false;
 263         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 264         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 265         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 266                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 267                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 268                        0, 0);
 269
 270         // always wrap words
 271         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 272
 273         // finally, put the vertical scrollbar in the upper right corner
 274         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 275         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 276         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 277                      GTK_FILL,
 278                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 279                      0, 0);
 280     }
 281     else
 282     {
 283         // a single-line text control: no need for scrollbars
 284         m_widget =
 285         m_text = gtk_entry_new();
 286     }
 287
 288     m_parent->DoAddChild( this );
 289
 290     m_focusWidget = m_text;
 291
 292     PostCreation(size);
 293
 294     if (multi_line)
 295         gtk_widget_show(m_text);
 296
 297     if (multi_line)
 298     {
 299         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 300           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 301
 302         // only initialize gs_gtk_text_draw once, starting from the next the
 303         // klass::draw will already be wxgtk_text_draw
 304         if ( !gs_gtk_text_draw )
 305         {
 306             GtkDrawCallback&
 307                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 308
 309             gs_gtk_text_draw = draw;
 310
 311             draw = wxgtk_text_draw;
 312         }
 313     }
 314
 315     if (!value.empty())
 316     {
 317 #if !GTK_CHECK_VERSION(1, 2, 0)
 318         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 319         // gtk_editable_insert_text()
 320         gtk_widget_realize(m_text);
 321 #endif // GTK 1.0
 322
 323         gint tmp = 0;
 324 #if wxUSE_UNICODE
 325         wxWX2MBbuf val = value.mbc_str();
 326         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 327 #else
 328         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 329 #endif
 330
 331         if (multi_line)
 332         {
 333             // Bring editable's cursor uptodate. Bug in GTK.
 334             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 335         }
 336     }
 337
 338     if (style & wxTE_PASSWORD)
 339     {
 340         if (!multi_line)
 341             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 342     }
 343
 344     if (style & wxTE_READONLY)
 345     {
 346         if (!multi_line)
 347             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 348     }
 349     else
 350     {
 351         if (multi_line)
 352             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 353     }
 354
 355     // We want to be notified about text changes.
 356     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 357         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 358
 359     m_cursor = wxCursor( wxCURSOR_IBEAM );
 360
 361     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 362     SetDefaultStyle( attrDef );
 363
 364     return true;
 365 }
 366
 367
 368 void wxTextCtrl::CalculateScrollbar()
 369 {
 370     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 371
 372     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 373
 374     if (adj->upper - adj->page_size < 0.8)
 375     {
 376         if (m_vScrollbarVisible)
 377         {
 378             gtk_widget_hide( m_vScrollbar );
 379             m_vScrollbarVisible = false;
 380         }
 381     }
 382     else
 383     {
 384         if (!m_vScrollbarVisible)
 385         {
 386             gtk_widget_show( m_vScrollbar );
 387             m_vScrollbarVisible = true;
 388         }
 389     }
 390 }
 391
 392 wxString wxTextCtrl::GetValue() const
 393 {
 394     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 395
 396     wxString tmp;
 397     if (m_windowStyle & wxTE_MULTILINE)
 398     {
 399         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 400         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 401         tmp = text;
 402         g_free( text );
 403     }
 404     else
 405     {
 406         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 407     }
 408
 409     return tmp;
 410 }
 411
 412 void wxTextCtrl::SetValue( const wxString &value )
 413 {
 414     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 415
 416     if (m_windowStyle & wxTE_MULTILINE)
 417     {
 418         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 419         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 420         len = 0;
 421         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 422     }
 423     else
 424     {
 425         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 426     }
 427
 428     // GRG, Jun/2000: Changed this after a lot of discussion in
 429     //   the lists. wxWidgets 2.2 will have a set of flags to
 430     //   customize this behaviour.
 431     SetInsertionPoint(0);
 432
 433     m_modified = false;
 434 }
 435
 436 void wxTextCtrl::WriteText( const wxString &text )
 437 {
 438     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 439
 440     if ( text.empty() )
 441         return;
 442
 443     // gtk_text_changed_callback() will set m_modified to true but m_modified
 444     // shouldn't be changed by the program writing to the text control itself,
 445     // so save the old value and restore when we're done
 446     bool oldModified = m_modified;
 447
 448     if ( m_windowStyle & wxTE_MULTILINE )
 449     {
 450         // After cursor movements, gtk_text_get_point() is wrong by one.
 451         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 452
 453         // always use m_defaultStyle, even if it is empty as otherwise
 454         // resetting the style and appending some more text wouldn't work: if
 455         // we don't specify the style explicitly, the old style would be used
 456         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 457         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.Len());
 458
 459         // we called wxGtkTextInsert with correct font, no need to do anything
 460         // in UpdateFontIfNeeded() any longer
 461         if ( !text.empty() )
 462         {
 463             SetUpdateFont(false);
 464         }
 465
 466         // Bring editable's cursor back uptodate.
 467         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 468     }
 469     else // single line
 470     {
 471         // First remove the selection if there is one
 472         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 473
 474         // This moves the cursor pos to behind the inserted text.
 475         gint len = GET_EDITABLE_POS(m_text);
 476
 477         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.Len(), &len );
 478
 479         // Bring entry's cursor uptodate.
 480         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 481     }
 482
 483     m_modified = oldModified;
 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;
 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 ( IsMultiLine() )
 629     {
 630         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 631           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 632
 633         /* we fake a set_point by inserting and deleting. as the user
 634            isn't supposed to get to know about this non-sense, we
 635            disconnect so that no events are sent to the user program. */
 636
 637         gint tmp = (gint)pos;
 638         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 639         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 640
 641         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 642           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 643
 644         // bring editable's cursor uptodate. Bug in GTK.
 645         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 646     }
 647     else
 648     {
 649         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 650
 651         // Bring editable's cursor uptodate. Bug in GTK.
 652         SET_EDITABLE_POS(m_text, (guint32)pos);
 653     }
 654 }
 655
 656 void wxTextCtrl::SetInsertionPointEnd()
 657 {
 658     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 659
 660     if (m_windowStyle & wxTE_MULTILINE)
 661     {
 662         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 663     }
 664     else
 665     {
 666         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 667     }
 668 }
 669
 670 void wxTextCtrl::SetEditable( bool editable )
 671 {
 672     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 673
 674     if (m_windowStyle & wxTE_MULTILINE)
 675     {
 676         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 677     }
 678     else
 679     {
 680         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 681     }
 682 }
 683
 684 bool wxTextCtrl::Enable( bool enable )
 685 {
 686     if (!wxWindowBase::Enable(enable))
 687     {
 688         // nothing to do
 689         return false;
 690     }
 691
 692     if (m_windowStyle & wxTE_MULTILINE)
 693     {
 694         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 695         OnParentEnable(enable);
 696     }
 697     else
 698     {
 699         gtk_widget_set_sensitive( m_text, enable );
 700     }
 701
 702     return true;
 703 }
 704
 705 // wxGTK-specific: called recursively by Enable,
 706 // to give widgets an oppprtunity to correct their colours after they
 707 // have been changed by Enable
 708 void wxTextCtrl::OnParentEnable( bool enable )
 709 {
 710     // If we have a custom background colour, we use this colour in both
 711     // disabled and enabled mode, or we end up with a different colour under the
 712     // text.
 713     wxColour oldColour = GetBackgroundColour();
 714     if (oldColour.Ok())
 715     {
 716         // Need to set twice or it'll optimize the useful stuff out
 717         if (oldColour == * wxWHITE)
 718             SetBackgroundColour(*wxBLACK);
 719         else
 720             SetBackgroundColour(*wxWHITE);
 721         SetBackgroundColour(oldColour);
 722     }
 723 }
 724
 725 void wxTextCtrl::MarkDirty()
 726 {
 727     m_modified = true;
 728 }
 729
 730 void wxTextCtrl::DiscardEdits()
 731 {
 732     m_modified = false;
 733 }
 734
 735 // ----------------------------------------------------------------------------
 736 // max text length support
 737 // ----------------------------------------------------------------------------
 738
 739 void wxTextCtrl::IgnoreNextTextUpdate()
 740 {
 741     m_ignoreNextUpdate = true;
 742 }
 743
 744 bool wxTextCtrl::IgnoreTextUpdate()
 745 {
 746     if ( m_ignoreNextUpdate )
 747     {
 748         m_ignoreNextUpdate = false;
 749
 750         return true;
 751     }
 752
 753     return false;
 754 }
 755
 756 void wxTextCtrl::SetMaxLength(unsigned long len)
 757 {
 758     if ( !HasFlag(wxTE_MULTILINE) )
 759     {
 760         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 761
 762         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 763         // we had tried to enter more text than allowed by max text length and
 764         // the text wasn't really changed
 765         //
 766         // to detect this and generate TEXT_MAXLEN event instead of
 767         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 768         //
 769         // when max len is set to 0 we disconnect our handler as it means that
 770         // we shouldn't check anything any more
 771         if ( len )
 772         {
 773             gtk_signal_connect( GTK_OBJECT(m_text),
 774                                 "insert_text",
 775                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 776                                 (gpointer)this);
 777         }
 778         else // no checking
 779         {
 780             gtk_signal_disconnect_by_func
 781             (
 782                 GTK_OBJECT(m_text),
 783                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 784                 (gpointer)this
 785             );
 786         }
 787     }
 788 }
 789
 790 void wxTextCtrl::SetSelection( long from, long to )
 791 {
 792     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 793
 794     if (from == -1 && to == -1)
 795     {
 796         from = 0;
 797         to = GetValue().Length();
 798     }
 799
 800     if ( (m_windowStyle & wxTE_MULTILINE) &&
 801          !GTK_TEXT(m_text)->line_start_cache )
 802     {
 803         // tell the programmer that it didn't work
 804         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 805         return;
 806     }
 807
 808     if (m_windowStyle & wxTE_MULTILINE)
 809     {
 810         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 811     }
 812     else
 813     {
 814         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 815     }
 816 }
 817
 818 void wxTextCtrl::ShowPosition( long pos )
 819 {
 820     if (m_windowStyle & wxTE_MULTILINE)
 821     {
 822         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 823         float totalLines =  (float) GetNumberOfLines();
 824         long posX;
 825         long posY;
 826         PositionToXY(pos, &posX, &posY);
 827         float posLine = (float) posY;
 828         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 829         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 830     }
 831 }
 832
 833 long wxTextCtrl::GetInsertionPoint() const
 834 {
 835     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 836     return (long) GET_EDITABLE_POS(m_text);
 837 }
 838
 839 wxTextPos wxTextCtrl::GetLastPosition() const
 840 {
 841     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 842
 843     int pos = 0;
 844
 845     if (m_windowStyle & wxTE_MULTILINE)
 846     {
 847         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 848     }
 849     else
 850     {
 851         pos = GTK_ENTRY(m_text)->text_length;
 852     }
 853
 854     return (long)pos;
 855 }
 856
 857 void wxTextCtrl::Remove( long from, long to )
 858 {
 859     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 860     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 861 }
 862
 863 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 864 {
 865     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 866
 867     Remove( from, to );
 868
 869     if (!value.empty())
 870     {
 871         gint pos = (gint)from;
 872 #if wxUSE_UNICODE
 873         wxWX2MBbuf buf = value.mbc_str();
 874         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 875 #else
 876         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 877 #endif // wxUSE_UNICODE
 878     }
 879 }
 880
 881 void wxTextCtrl::Cut()
 882 {
 883     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 884     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 885 }
 886
 887 void wxTextCtrl::Copy()
 888 {
 889     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 890     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 891 }
 892
 893 void wxTextCtrl::Paste()
 894 {
 895     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 896     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 897 }
 898
 899 // Undo/redo
 900 void wxTextCtrl::Undo()
 901 {
 902     // TODO
 903     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 904 }
 905
 906 void wxTextCtrl::Redo()
 907 {
 908     // TODO
 909     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 910 }
 911
 912 bool wxTextCtrl::CanUndo() const
 913 {
 914     // TODO
 915     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 916     return false;
 917 }
 918
 919 bool wxTextCtrl::CanRedo() const
 920 {
 921     // TODO
 922     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 923     return false;
 924 }
 925
 926 // If the return values from and to are the same, there is no
 927 // selection.
 928 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 929 {
 930     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 931
 932     gint from = -1;
 933     gint to = -1;
 934     bool haveSelection = false;
 935
 936      if ( (GTK_EDITABLE(m_text)->has_selection) )
 937      {
 938          haveSelection = true;
 939          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 940          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 941      }
 942
 943      if (! haveSelection )
 944           from = to = GetInsertionPoint();
 945
 946      if ( from > to )
 947      {
 948          // exchange them to be compatible with wxMSW
 949          gint tmp = from;
 950          from = to;
 951          to = tmp;
 952      }
 953
 954     if ( fromOut )
 955         *fromOut = from;
 956     if ( toOut )
 957         *toOut = to;
 958 }
 959
 960
 961 bool wxTextCtrl::IsEditable() const
 962 {
 963     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 964     return GTK_EDITABLE(m_text)->editable;
 965 }
 966
 967 bool wxTextCtrl::IsModified() const
 968 {
 969     return m_modified;
 970 }
 971
 972 void wxTextCtrl::Clear()
 973 {
 974     SetValue( wxEmptyString );
 975 }
 976
 977 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 978 {
 979     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 980
 981     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 982     {
 983         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 984         event.SetEventObject(this);
 985         event.SetString(GetValue());
 986         if (GetEventHandler()->ProcessEvent(event)) return;
 987     }
 988
 989     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 990     {
 991         // This will invoke the dialog default action, such
 992         // as the clicking the default button.
 993
 994         wxWindow *top_frame = m_parent;
 995         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 996             top_frame = top_frame->GetParent();
 997
 998         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 999         {
1000             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1001
1002             if (window->default_widget)
1003             {
1004                 gtk_widget_activate (window->default_widget);
1005                 return;
1006             }
1007         }
1008     }
1009
1010     key_event.Skip();
1011 }
1012
1013 GtkWidget* wxTextCtrl::GetConnectWidget()
1014 {
1015     return GTK_WIDGET(m_text);
1016 }
1017
1018 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1019 {
1020     if (m_windowStyle & wxTE_MULTILINE)
1021     {
1022         return (window == GTK_TEXT(m_text)->text_area);
1023     }
1024     else
1025     {
1026         return (window == GTK_ENTRY(m_text)->text_area);
1027     }
1028 }
1029
1030 // the font will change for subsequent text insertiongs
1031 bool wxTextCtrl::SetFont( const wxFont &font )
1032 {
1033     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1034
1035     if ( !wxTextCtrlBase::SetFont(font) )
1036     {
1037         // font didn't change, nothing to do
1038         return false;
1039     }
1040
1041     if ( m_windowStyle & wxTE_MULTILINE )
1042     {
1043         SetUpdateFont(true);
1044
1045         m_defaultStyle.SetFont(font);
1046
1047         ChangeFontGlobally();
1048     }
1049
1050     return true;
1051 }
1052
1053 void wxTextCtrl::ChangeFontGlobally()
1054 {
1055     // this method is very inefficient and hence should be called as rarely as
1056     // possible!
1057     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1058
1059                   _T("shouldn't be called for single line controls") );
1060
1061     wxString value = GetValue();
1062     if ( !value.empty() )
1063     {
1064         SetUpdateFont(false);
1065
1066         Clear();
1067         AppendText(value);
1068     }
1069 }
1070
1071 void wxTextCtrl::UpdateFontIfNeeded()
1072 {
1073     if ( m_updateFont )
1074         ChangeFontGlobally();
1075 }
1076
1077 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1078 {
1079     if ( !wxControl::SetForegroundColour(colour) )
1080         return false;
1081
1082     // update default fg colour too
1083     m_defaultStyle.SetTextColour(colour);
1084
1085     return true;
1086 }
1087
1088 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1089 {
1090     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1091
1092     if ( !wxControl::SetBackgroundColour( colour ) )
1093         return false;
1094
1095     if (!m_widget->window)
1096         return false;
1097
1098     if (!m_backgroundColour.Ok())
1099         return false;
1100
1101     if (m_windowStyle & wxTE_MULTILINE)
1102     {
1103         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1104         if (!window)
1105             return false;
1106         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1107         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1108         gdk_window_clear( window );
1109     }
1110
1111     // change active background color too
1112     m_defaultStyle.SetBackgroundColour( colour );
1113
1114     return true;
1115 }
1116
1117 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1118 {
1119     if ( m_windowStyle & wxTE_MULTILINE )
1120     {
1121         if ( style.IsDefault() )
1122         {
1123             // nothing to do
1124             return true;
1125         }
1126
1127         // VERY dirty way to do that - removes the required text and re-adds it
1128         // with styling (FIXME)
1129
1130         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1131
1132         wxCHECK_MSG( start >= 0 && end <= l, false,
1133                      _T("invalid range in wxTextCtrl::SetStyle") );
1134
1135         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1136         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1137         wxString tmp(text,*wxConvCurrent);
1138         g_free( text );
1139
1140         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1141         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1142
1143     #if wxUSE_UNICODE
1144         wxWX2MBbuf buf = tmp.mbc_str();
1145         const char *txt = buf;
1146         size_t txtlen = strlen(buf);
1147     #else
1148         const char *txt = tmp;
1149         size_t txtlen = tmp.length();
1150     #endif
1151
1152         // use the attributes from style which are set in it and fall back
1153         // first to the default style and then to the text control default
1154         // colours for the others
1155         wxGtkTextInsert(m_text,
1156                         wxTextAttr::Combine(style, m_defaultStyle, this),
1157                         txt,
1158                         txtlen);
1159
1160         /* does not seem to help under GTK+ 1.2 !!!
1161         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1162         SetInsertionPoint( old_pos );
1163
1164         return true;
1165     }
1166
1167     // else single line
1168     // cannot do this for GTK+'s Entry widget
1169     return false;
1170 }
1171
1172 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1173 {
1174     gtk_widget_modify_style(m_text, style);
1175 }
1176
1177 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1178 {
1179     Cut();
1180 }
1181
1182 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1183 {
1184     Copy();
1185 }
1186
1187 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1188 {
1189     Paste();
1190 }
1191
1192 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1193 {
1194     Undo();
1195 }
1196
1197 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1198 {
1199     Redo();
1200 }
1201
1202 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1203 {
1204     event.Enable( CanCut() );
1205 }
1206
1207 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1208 {
1209     event.Enable( CanCopy() );
1210 }
1211
1212 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1213 {
1214     event.Enable( CanPaste() );
1215 }
1216
1217 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1218 {
1219     event.Enable( CanUndo() );
1220 }
1221
1222 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1223 {
1224     event.Enable( CanRedo() );
1225 }
1226
1227 void wxTextCtrl::OnInternalIdle()
1228 {
1229     wxCursor cursor = m_cursor;
1230     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1231
1232     if (cursor.Ok())
1233     {
1234         GdkWindow *window = (GdkWindow*) NULL;
1235         if (HasFlag(wxTE_MULTILINE))
1236             window = GTK_TEXT(m_text)->text_area;
1237         else
1238             window = GTK_ENTRY(m_text)->text_area;
1239
1240         if (window)
1241             gdk_window_set_cursor( window, cursor.GetCursor() );
1242
1243         if (!g_globalCursor.Ok())
1244             cursor = *wxSTANDARD_CURSOR;
1245
1246         window = m_widget->window;
1247         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1248             gdk_window_set_cursor( window, cursor.GetCursor() );
1249     }
1250
1251     if (g_delayedFocus == this)
1252     {
1253         if (GTK_WIDGET_REALIZED(m_widget))
1254         {
1255             gtk_widget_grab_focus( m_widget );
1256             g_delayedFocus = NULL;
1257         }
1258     }
1259
1260     if (wxUpdateUIEvent::CanUpdate(this))
1261         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1262 }
1263
1264 wxSize wxTextCtrl::DoGetBestSize() const
1265 {
1266     // FIXME should be different for multi-line controls...
1267     wxSize ret( wxControl::DoGetBestSize() );
1268     wxSize best(80, ret.y);
1269     CacheBestSize(best);
1270     return best;
1271 }
1272
1273 // ----------------------------------------------------------------------------
1274 // freeze/thaw
1275 // ----------------------------------------------------------------------------
1276
1277 void wxTextCtrl::Freeze()
1278 {
1279     if ( HasFlag(wxTE_MULTILINE) )
1280     {
1281         gtk_text_freeze(GTK_TEXT(m_text));
1282     }
1283 }
1284
1285 void wxTextCtrl::Thaw()
1286 {
1287     if ( HasFlag(wxTE_MULTILINE) )
1288     {
1289         GTK_TEXT(m_text)->vadj->value = 0.0;
1290
1291         gtk_text_thaw(GTK_TEXT(m_text));
1292     }
1293 }
1294
1295 // ----------------------------------------------------------------------------
1296 // scrolling
1297 // ----------------------------------------------------------------------------
1298
1299 GtkAdjustment *wxTextCtrl::GetVAdj() const
1300 {
1301     if ( !IsMultiLine() )
1302         return NULL;
1303
1304     return GTK_TEXT(m_text)->vadj;
1305 }
1306
1307 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1308 {
1309     float value = adj->value + diff;
1310
1311     if ( value < 0 )
1312         value = 0;
1313
1314     float upper = adj->upper - adj->page_size;
1315     if ( value > upper )
1316         value = upper;
1317
1318     // did we noticeably change the scroll position?
1319     if ( fabs(adj->value - value) < 0.2 )
1320     {
1321         // well, this is what Robert does in wxScrollBar, so it must be good...
1322         return false;
1323     }
1324
1325     adj->value = value;
1326     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1327
1328     return true;
1329 }
1330
1331 bool wxTextCtrl::ScrollLines(int lines)
1332 {
1333     GtkAdjustment *adj = GetVAdj();
1334     if ( !adj )
1335         return false;
1336
1337     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1338     int diff = 10*lines;
1339
1340     return DoScroll(adj, diff);
1341 }
1342
1343 bool wxTextCtrl::ScrollPages(int pages)
1344 {
1345     GtkAdjustment *adj = GetVAdj();
1346     if ( !adj )
1347         return false;
1348
1349     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1350 }
1351
1352
1353 // static
1354 wxVisualAttributes
1355 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1356 {
1357     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1358 }