src/gtk1/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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
  15 #ifndef WX_PRECOMP
  16     #include "wx/intl.h"
  17     #include "wx/log.h"
  18     #include "wx/utils.h"
  19     #include "wx/panel.h"
  20     #include "wx/settings.h"
  21     #include "wx/math.h"
  22 #endif
  23
  24 #include "wx/strconv.h"
  25 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/gtk1/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 wxCursor   g_globalCursor;
  46 extern wxWindowGTK *g_delayedFocus;
  47
  48 // ----------------------------------------------------------------------------
  49 // helpers
  50 // ----------------------------------------------------------------------------
  51
  52 extern "C" {
  53 static void wxGtkTextInsert(GtkWidget *text,
  54                             const wxTextAttr& attr,
  55                             const char *txt,
  56                             size_t len)
  57 {
  58     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  59                                    : NULL;
  60
  61     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  62                                            : NULL;
  63
  64     GdkColor *colBg = attr.HasBackgroundColour()
  65                         ? attr.GetBackgroundColour().GetColor()
  66                         : NULL;
  67
  68     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  69 }
  70 }
  71
  72 // ----------------------------------------------------------------------------
  73 // "insert_text" for GtkEntry
  74 // ----------------------------------------------------------------------------
  75
  76 extern "C" {
  77 static void
  78 gtk_insert_text_callback(GtkEditable *editable,
  79                          const gchar *new_text,
  80                          gint new_text_length,
  81                          gint *position,
  82                          wxTextCtrl *win)
  83 {
  84     if (g_isIdle)
  85         wxapp_install_idle_handler();
  86
  87     // we should only be called if we have a max len limit at all
  88     GtkEntry *entry = GTK_ENTRY (editable);
  89
  90     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  91
  92     // check that we don't overflow the max length limit
  93     //
  94     // FIXME: this doesn't work when we paste a string which is going to be
  95     //        truncated
  96     if ( entry->text_length == entry->text_max_length )
  97     {
  98         // we don't need to run the base class version at all
  99         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 100
 101         // remember that the next changed signal is to be ignored to avoid
 102         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 103         win->IgnoreNextTextUpdate();
 104
 105         // and generate the correct one ourselves
 106         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 107         event.SetEventObject(win);
 108         event.SetString(win->GetValue());
 109         win->GetEventHandler()->ProcessEvent( event );
 110     }
 111 }
 112 }
 113
 114 //-----------------------------------------------------------------------------
 115 //  "changed"
 116 //-----------------------------------------------------------------------------
 117
 118 extern "C" {
 119 static void
 120 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 121 {
 122     if ( win->IgnoreTextUpdate() )
 123         return;
 124
 125     if (!win->m_hasVMT) return;
 126
 127     if (g_isIdle)
 128         wxapp_install_idle_handler();
 129
 130     win->SetModified();
 131     win->UpdateFontIfNeeded();
 132
 133     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 134     event.SetEventObject( win );
 135     win->GetEventHandler()->ProcessEvent( event );
 136 }
 137 }
 138
 139 //-----------------------------------------------------------------------------
 140 // "changed" from vertical scrollbar
 141 //-----------------------------------------------------------------------------
 142
 143 extern "C" {
 144 static void
 145 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 146 {
 147     if (!win->m_hasVMT) return;
 148
 149     if (g_isIdle)
 150         wxapp_install_idle_handler();
 151
 152     win->CalculateScrollbar();
 153 }
 154 }
 155
 156 // ----------------------------------------------------------------------------
 157 // redraw callback for multiline text
 158 // ----------------------------------------------------------------------------
 159
 160 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 161 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 162 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 163 // don't do anything if we're inside wxYield()
 164
 165 extern bool wxIsInsideYield;
 166
 167 extern "C" {
 168     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 169 }
 170
 171 static GtkDrawCallback gs_gtk_text_draw = NULL;
 172
 173 extern "C" {
 174 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 175 {
 176     if ( !wxIsInsideYield )
 177     {
 178         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 179                      _T("infinite recursion in wxgtk_text_draw aborted") );
 180
 181         gs_gtk_text_draw(widget, rect);
 182     }
 183 }
 184 }
 185
 186 //-----------------------------------------------------------------------------
 187 //  wxTextCtrl
 188 //-----------------------------------------------------------------------------
 189
 190 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 191
 192 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 193     EVT_CHAR(wxTextCtrl::OnChar)
 194
 195     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 196     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 197     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 198     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 199     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 200
 201     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 202     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 203     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 204     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 205     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 206 END_EVENT_TABLE()
 207
 208 void wxTextCtrl::Init()
 209 {
 210     m_ignoreNextUpdate =
 211     m_modified = false;
 212     SetUpdateFont(false);
 213     m_text =
 214     m_vScrollbar = (GtkWidget *)NULL;
 215 }
 216
 217 wxTextCtrl::~wxTextCtrl()
 218 {
 219 }
 220
 221 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 222                         wxWindowID id,
 223                         const wxString &value,
 224                         const wxPoint &pos,
 225                         const wxSize &size,
 226                         long style,
 227                         const wxValidator& validator,
 228                         const wxString &name )
 229 {
 230     Init();
 231
 232     Create( parent, id, value, pos, size, style, validator, name );
 233 }
 234
 235 bool wxTextCtrl::Create( wxWindow *parent,
 236                          wxWindowID id,
 237                          const wxString &value,
 238                          const wxPoint &pos,
 239                          const wxSize &size,
 240                          long style,
 241                          const wxValidator& validator,
 242                          const wxString &name )
 243 {
 244     m_needParent = true;
 245     m_acceptsFocus = true;
 246
 247     if (!PreCreation( parent, pos, size ) ||
 248         !CreateBase( parent, id, pos, size, style, validator, name ))
 249     {
 250         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 251         return false;
 252     }
 253
 254
 255     m_vScrollbarVisible = false;
 256
 257     bool multi_line = (style & wxTE_MULTILINE) != 0;
 258
 259     if (multi_line)
 260     {
 261         // create our control ...
 262         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 263
 264         // ... and put into the upper left hand corner of the table
 265         bool bHasHScrollbar = false;
 266         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 267         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 268         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 269                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 270                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 271                        0, 0);
 272
 273         // always wrap words
 274         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 275
 276         // finally, put the vertical scrollbar in the upper right corner
 277         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 278         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 279         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 280                      GTK_FILL,
 281                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 282                      0, 0);
 283     }
 284     else
 285     {
 286         // a single-line text control: no need for scrollbars
 287         m_widget =
 288         m_text = gtk_entry_new();
 289     }
 290
 291     m_parent->DoAddChild( this );
 292
 293     m_focusWidget = m_text;
 294
 295     PostCreation(size);
 296
 297     if (multi_line)
 298         gtk_widget_show(m_text);
 299
 300     if (multi_line)
 301     {
 302         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 303           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 304
 305         // only initialize gs_gtk_text_draw once, starting from the next the
 306         // klass::draw will already be wxgtk_text_draw
 307         if ( !gs_gtk_text_draw )
 308         {
 309             GtkDrawCallback&
 310                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 311
 312             gs_gtk_text_draw = draw;
 313
 314             draw = wxgtk_text_draw;
 315         }
 316     }
 317
 318     if (!value.empty())
 319     {
 320 #if !GTK_CHECK_VERSION(1, 2, 0)
 321         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 322         // gtk_editable_insert_text()
 323         gtk_widget_realize(m_text);
 324 #endif // GTK 1.0
 325
 326         gint tmp = 0;
 327 #if wxUSE_UNICODE
 328         wxWX2MBbuf val = value.mbc_str();
 329         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 330 #else
 331         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 332 #endif
 333
 334         if (multi_line)
 335         {
 336             // Bring editable's cursor uptodate. Bug in GTK.
 337             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 338         }
 339     }
 340
 341     if (style & wxTE_PASSWORD)
 342     {
 343         if (!multi_line)
 344             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 345     }
 346
 347     if (style & wxTE_READONLY)
 348     {
 349         if (!multi_line)
 350             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 351     }
 352     else
 353     {
 354         if (multi_line)
 355             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 356     }
 357
 358     // We want to be notified about text changes.
 359     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 360         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 361
 362     m_cursor = wxCursor( wxCURSOR_IBEAM );
 363
 364     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 365     SetDefaultStyle( attrDef );
 366
 367     return true;
 368 }
 369
 370
 371 void wxTextCtrl::CalculateScrollbar()
 372 {
 373     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 374
 375     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 376
 377     if (adj->upper - adj->page_size < 0.8)
 378     {
 379         if (m_vScrollbarVisible)
 380         {
 381             gtk_widget_hide( m_vScrollbar );
 382             m_vScrollbarVisible = false;
 383         }
 384     }
 385     else
 386     {
 387         if (!m_vScrollbarVisible)
 388         {
 389             gtk_widget_show( m_vScrollbar );
 390             m_vScrollbarVisible = true;
 391         }
 392     }
 393 }
 394
 395 wxString wxTextCtrl::GetValue() const
 396 {
 397     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 398
 399     wxString tmp;
 400     if (m_windowStyle & wxTE_MULTILINE)
 401     {
 402         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 403         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 404         tmp = text;
 405         g_free( text );
 406     }
 407     else
 408     {
 409         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 410     }
 411
 412     return tmp;
 413 }
 414
 415 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 416 {
 417     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 418
 419     if ( !(flags & SetValue_SendEvent) )
 420     {
 421         // do not generate events
 422         IgnoreNextTextUpdate();
 423     }
 424
 425     if (m_windowStyle & wxTE_MULTILINE)
 426     {
 427         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 428         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 429         len = 0;
 430         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 431     }
 432     else
 433     {
 434         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 435     }
 436
 437     // GRG, Jun/2000: Changed this after a lot of discussion in
 438     //   the lists. wxWidgets 2.2 will have a set of flags to
 439     //   customize this behaviour.
 440     SetInsertionPoint(0);
 441
 442     m_modified = false;
 443 }
 444
 445 void wxTextCtrl::WriteText( const wxString &text )
 446 {
 447     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 448
 449     if ( text.empty() )
 450         return;
 451
 452     // gtk_text_changed_callback() will set m_modified to true but m_modified
 453     // shouldn't be changed by the program writing to the text control itself,
 454     // so save the old value and restore when we're done
 455     bool oldModified = m_modified;
 456
 457     if ( m_windowStyle & wxTE_MULTILINE )
 458     {
 459         // After cursor movements, gtk_text_get_point() is wrong by one.
 460         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 461
 462         // always use m_defaultStyle, even if it is empty as otherwise
 463         // resetting the style and appending some more text wouldn't work: if
 464         // we don't specify the style explicitly, the old style would be used
 465         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 466         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 467
 468         // we called wxGtkTextInsert with correct font, no need to do anything
 469         // in UpdateFontIfNeeded() any longer
 470         if ( !text.empty() )
 471         {
 472             SetUpdateFont(false);
 473         }
 474
 475         // Bring editable's cursor back uptodate.
 476         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 477     }
 478     else // single line
 479     {
 480         // First remove the selection if there is one
 481         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 482
 483         // This moves the cursor pos to behind the inserted text.
 484         gint len = GET_EDITABLE_POS(m_text);
 485
 486         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 487
 488         // Bring entry's cursor uptodate.
 489         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 490     }
 491
 492     m_modified = oldModified;
 493 }
 494
 495 void wxTextCtrl::AppendText( const wxString &text )
 496 {
 497     SetInsertionPointEnd();
 498     WriteText( text );
 499 }
 500
 501 wxString wxTextCtrl::GetLineText( long lineNo ) const
 502 {
 503     if (m_windowStyle & wxTE_MULTILINE)
 504     {
 505         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 506         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 507
 508         if (text)
 509         {
 510             wxString buf;
 511             long i;
 512             int currentLine = 0;
 513             for (i = 0; currentLine != lineNo && text[i]; i++ )
 514                 if (text[i] == '\n')
 515             currentLine++;
 516             // Now get the text
 517             int j;
 518             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 519                 buf += text[i];
 520
 521             g_free( text );
 522             return buf;
 523         }
 524         else
 525         {
 526             return wxEmptyString;
 527         }
 528     }
 529     else
 530     {
 531         if (lineNo == 0) return GetValue();
 532         return wxEmptyString;
 533     }
 534 }
 535
 536 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 537 {
 538   /* If you implement this, don't forget to update the documentation!
 539    * (file docs/latex/wx/text.tex) */
 540     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 541 }
 542
 543 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 544 {
 545     if ( m_windowStyle & wxTE_MULTILINE )
 546     {
 547         wxString text = GetValue();
 548
 549         // cast to prevent warning. But pos really should've been unsigned.
 550         if( (unsigned long)pos > text.length()  )
 551             return false;
 552
 553         *x=0;   // First Col
 554         *y=0;   // First Line
 555
 556         const wxChar* stop = text.c_str() + pos;
 557         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 558         {
 559             if (*p == wxT('\n'))
 560             {
 561                 (*y)++;
 562                 *x=0;
 563             }
 564             else
 565                 (*x)++;
 566         }
 567     }
 568     else // single line control
 569     {
 570         if ( pos <= GTK_ENTRY(m_text)->text_length )
 571         {
 572             *y = 0;
 573             *x = pos;
 574         }
 575         else
 576         {
 577             // index out of bounds
 578             return false;
 579         }
 580     }
 581
 582     return true;
 583 }
 584
 585 long wxTextCtrl::XYToPosition(long x, long y ) const
 586 {
 587     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 588
 589     long pos=0;
 590     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 591
 592     pos += x;
 593     return pos;
 594 }
 595
 596 int wxTextCtrl::GetLineLength(long lineNo) const
 597 {
 598     wxString str = GetLineText (lineNo);
 599     return (int) str.length();
 600 }
 601
 602 int wxTextCtrl::GetNumberOfLines() const
 603 {
 604     if (m_windowStyle & wxTE_MULTILINE)
 605     {
 606         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 607         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 608
 609         if (text)
 610         {
 611             int currentLine = 0;
 612             for (int i = 0; i < len; i++ )
 613             {
 614                 if (text[i] == '\n')
 615                     currentLine++;
 616             }
 617             g_free( text );
 618
 619             // currentLine is 0 based, add 1 to get number of lines
 620             return currentLine + 1;
 621         }
 622         else
 623         {
 624             return 0;
 625         }
 626     }
 627     else
 628     {
 629         return 1;
 630     }
 631 }
 632
 633 void wxTextCtrl::SetInsertionPoint( long pos )
 634 {
 635     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 636
 637     if ( IsMultiLine() )
 638     {
 639         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 640           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 641
 642         /* we fake a set_point by inserting and deleting. as the user
 643            isn't supposed to get to know about this non-sense, we
 644            disconnect so that no events are sent to the user program. */
 645
 646         gint tmp = (gint)pos;
 647         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 648         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 649
 650         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 651           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 652
 653         // bring editable's cursor uptodate. Bug in GTK.
 654         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 655     }
 656     else
 657     {
 658         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 659
 660         // Bring editable's cursor uptodate. Bug in GTK.
 661         SET_EDITABLE_POS(m_text, (guint32)pos);
 662     }
 663 }
 664
 665 void wxTextCtrl::SetInsertionPointEnd()
 666 {
 667     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 668
 669     if (m_windowStyle & wxTE_MULTILINE)
 670     {
 671         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 672     }
 673     else
 674     {
 675         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 676     }
 677 }
 678
 679 void wxTextCtrl::SetEditable( bool editable )
 680 {
 681     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 682
 683     if (m_windowStyle & wxTE_MULTILINE)
 684     {
 685         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 686     }
 687     else
 688     {
 689         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 690     }
 691 }
 692
 693 bool wxTextCtrl::Enable( bool enable )
 694 {
 695     if (!wxWindowBase::Enable(enable))
 696     {
 697         // nothing to do
 698         return false;
 699     }
 700
 701     if (m_windowStyle & wxTE_MULTILINE)
 702     {
 703         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 704         OnParentEnable(enable);
 705     }
 706     else
 707     {
 708         gtk_widget_set_sensitive( m_text, enable );
 709     }
 710
 711     return true;
 712 }
 713
 714 // wxGTK-specific: called recursively by Enable,
 715 // to give widgets an oppprtunity to correct their colours after they
 716 // have been changed by Enable
 717 void wxTextCtrl::OnParentEnable( bool enable )
 718 {
 719     // If we have a custom background colour, we use this colour in both
 720     // disabled and enabled mode, or we end up with a different colour under the
 721     // text.
 722     wxColour oldColour = GetBackgroundColour();
 723     if (oldColour.Ok())
 724     {
 725         // Need to set twice or it'll optimize the useful stuff out
 726         if (oldColour == * wxWHITE)
 727             SetBackgroundColour(*wxBLACK);
 728         else
 729             SetBackgroundColour(*wxWHITE);
 730         SetBackgroundColour(oldColour);
 731     }
 732 }
 733
 734 void wxTextCtrl::MarkDirty()
 735 {
 736     m_modified = true;
 737 }
 738
 739 void wxTextCtrl::DiscardEdits()
 740 {
 741     m_modified = false;
 742 }
 743
 744 // ----------------------------------------------------------------------------
 745 // max text length support
 746 // ----------------------------------------------------------------------------
 747
 748 void wxTextCtrl::IgnoreNextTextUpdate()
 749 {
 750     m_ignoreNextUpdate = true;
 751 }
 752
 753 bool wxTextCtrl::IgnoreTextUpdate()
 754 {
 755     if ( m_ignoreNextUpdate )
 756     {
 757         m_ignoreNextUpdate = false;
 758
 759         return true;
 760     }
 761
 762     return false;
 763 }
 764
 765 void wxTextCtrl::SetMaxLength(unsigned long len)
 766 {
 767     if ( !HasFlag(wxTE_MULTILINE) )
 768     {
 769         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 770
 771         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 772         // we had tried to enter more text than allowed by max text length and
 773         // the text wasn't really changed
 774         //
 775         // to detect this and generate TEXT_MAXLEN event instead of
 776         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 777         //
 778         // when max len is set to 0 we disconnect our handler as it means that
 779         // we shouldn't check anything any more
 780         if ( len )
 781         {
 782             gtk_signal_connect( GTK_OBJECT(m_text),
 783                                 "insert_text",
 784                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 785                                 (gpointer)this);
 786         }
 787         else // no checking
 788         {
 789             gtk_signal_disconnect_by_func
 790             (
 791                 GTK_OBJECT(m_text),
 792                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 793                 (gpointer)this
 794             );
 795         }
 796     }
 797 }
 798
 799 void wxTextCtrl::SetSelection( long from, long to )
 800 {
 801     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 802
 803     if (from == -1 && to == -1)
 804     {
 805         from = 0;
 806         to = GetValue().length();
 807     }
 808
 809     if ( (m_windowStyle & wxTE_MULTILINE) &&
 810          !GTK_TEXT(m_text)->line_start_cache )
 811     {
 812         // tell the programmer that it didn't work
 813         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 814         return;
 815     }
 816
 817     if (m_windowStyle & wxTE_MULTILINE)
 818     {
 819         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 820     }
 821     else
 822     {
 823         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 824     }
 825 }
 826
 827 void wxTextCtrl::ShowPosition( long pos )
 828 {
 829     if (m_windowStyle & wxTE_MULTILINE)
 830     {
 831         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 832         float totalLines =  (float) GetNumberOfLines();
 833         long posX;
 834         long posY;
 835         PositionToXY(pos, &posX, &posY);
 836         float posLine = (float) posY;
 837         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 838         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 839     }
 840 }
 841
 842 long wxTextCtrl::GetInsertionPoint() const
 843 {
 844     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 845     return (long) GET_EDITABLE_POS(m_text);
 846 }
 847
 848 wxTextPos wxTextCtrl::GetLastPosition() const
 849 {
 850     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 851
 852     int pos = 0;
 853
 854     if (m_windowStyle & wxTE_MULTILINE)
 855     {
 856         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 857     }
 858     else
 859     {
 860         pos = GTK_ENTRY(m_text)->text_length;
 861     }
 862
 863     return (long)pos;
 864 }
 865
 866 void wxTextCtrl::Remove( long from, long to )
 867 {
 868     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 869     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 870 }
 871
 872 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 873 {
 874     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 875
 876     Remove( from, to );
 877
 878     if (!value.empty())
 879     {
 880         gint pos = (gint)from;
 881 #if wxUSE_UNICODE
 882         wxWX2MBbuf buf = value.mbc_str();
 883         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 884 #else
 885         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 886 #endif // wxUSE_UNICODE
 887     }
 888 }
 889
 890 void wxTextCtrl::Cut()
 891 {
 892     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 893     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 894 }
 895
 896 void wxTextCtrl::Copy()
 897 {
 898     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 899     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 900 }
 901
 902 void wxTextCtrl::Paste()
 903 {
 904     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 905     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 906 }
 907
 908 // Undo/redo
 909 void wxTextCtrl::Undo()
 910 {
 911     // TODO
 912     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 913 }
 914
 915 void wxTextCtrl::Redo()
 916 {
 917     // TODO
 918     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 919 }
 920
 921 bool wxTextCtrl::CanUndo() const
 922 {
 923     // TODO
 924     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 925     return false;
 926 }
 927
 928 bool wxTextCtrl::CanRedo() const
 929 {
 930     // TODO
 931     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 932     return false;
 933 }
 934
 935 // If the return values from and to are the same, there is no
 936 // selection.
 937 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 938 {
 939     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 940
 941     gint from = -1;
 942     gint to = -1;
 943     bool haveSelection = false;
 944
 945      if ( (GTK_EDITABLE(m_text)->has_selection) )
 946      {
 947          haveSelection = true;
 948          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 949          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 950      }
 951
 952      if (! haveSelection )
 953           from = to = GetInsertionPoint();
 954
 955      if ( from > to )
 956      {
 957          // exchange them to be compatible with wxMSW
 958          gint tmp = from;
 959          from = to;
 960          to = tmp;
 961      }
 962
 963     if ( fromOut )
 964         *fromOut = from;
 965     if ( toOut )
 966         *toOut = to;
 967 }
 968
 969
 970 bool wxTextCtrl::IsEditable() const
 971 {
 972     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 973     return GTK_EDITABLE(m_text)->editable;
 974 }
 975
 976 bool wxTextCtrl::IsModified() const
 977 {
 978     return m_modified;
 979 }
 980
 981 void wxTextCtrl::Clear()
 982 {
 983     SetValue( wxEmptyString );
 984 }
 985
 986 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 987 {
 988     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 989
 990     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 991     {
 992         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 993         event.SetEventObject(this);
 994         event.SetString(GetValue());
 995         if (GetEventHandler()->ProcessEvent(event)) return;
 996     }
 997
 998     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 999     {
1000         // This will invoke the dialog default action, such
1001         // as the clicking the default button.
1002
1003         wxWindow *top_frame = m_parent;
1004         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1005             top_frame = top_frame->GetParent();
1006
1007         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1008         {
1009             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1010
1011             if (window->default_widget)
1012             {
1013                 gtk_widget_activate (window->default_widget);
1014                 return;
1015             }
1016         }
1017     }
1018
1019     key_event.Skip();
1020 }
1021
1022 GtkWidget* wxTextCtrl::GetConnectWidget()
1023 {
1024     return GTK_WIDGET(m_text);
1025 }
1026
1027 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1028 {
1029     if (m_windowStyle & wxTE_MULTILINE)
1030     {
1031         return (window == GTK_TEXT(m_text)->text_area);
1032     }
1033     else
1034     {
1035         return (window == GTK_ENTRY(m_text)->text_area);
1036     }
1037 }
1038
1039 // the font will change for subsequent text insertiongs
1040 bool wxTextCtrl::SetFont( const wxFont &font )
1041 {
1042     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1043
1044     if ( !wxTextCtrlBase::SetFont(font) )
1045     {
1046         // font didn't change, nothing to do
1047         return false;
1048     }
1049
1050     if ( m_windowStyle & wxTE_MULTILINE )
1051     {
1052         SetUpdateFont(true);
1053
1054         m_defaultStyle.SetFont(font);
1055
1056         ChangeFontGlobally();
1057     }
1058
1059     return true;
1060 }
1061
1062 void wxTextCtrl::ChangeFontGlobally()
1063 {
1064     // this method is very inefficient and hence should be called as rarely as
1065     // possible!
1066     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1067
1068                   _T("shouldn't be called for single line controls") );
1069
1070     wxString value = GetValue();
1071     if ( !value.empty() )
1072     {
1073         SetUpdateFont(false);
1074
1075         Clear();
1076         AppendText(value);
1077     }
1078 }
1079
1080 void wxTextCtrl::UpdateFontIfNeeded()
1081 {
1082     if ( m_updateFont )
1083         ChangeFontGlobally();
1084 }
1085
1086 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1087 {
1088     if ( !wxControl::SetForegroundColour(colour) )
1089         return false;
1090
1091     // update default fg colour too
1092     m_defaultStyle.SetTextColour(colour);
1093
1094     return true;
1095 }
1096
1097 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1098 {
1099     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1100
1101     if ( !wxControl::SetBackgroundColour( colour ) )
1102         return false;
1103
1104     if (!m_widget->window)
1105         return false;
1106
1107     if (!m_backgroundColour.Ok())
1108         return false;
1109
1110     if (m_windowStyle & wxTE_MULTILINE)
1111     {
1112         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1113         if (!window)
1114             return false;
1115         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1116         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1117         gdk_window_clear( window );
1118     }
1119
1120     // change active background color too
1121     m_defaultStyle.SetBackgroundColour( colour );
1122
1123     return true;
1124 }
1125
1126 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1127 {
1128     if ( m_windowStyle & wxTE_MULTILINE )
1129     {
1130         if ( style.IsDefault() )
1131         {
1132             // nothing to do
1133             return true;
1134         }
1135
1136         // VERY dirty way to do that - removes the required text and re-adds it
1137         // with styling (FIXME)
1138
1139         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1140
1141         wxCHECK_MSG( start >= 0 && end <= l, false,
1142                      _T("invalid range in wxTextCtrl::SetStyle") );
1143
1144         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1145         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1146         wxString tmp(text,*wxConvCurrent);
1147         g_free( text );
1148
1149         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1150         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1151
1152     #if wxUSE_UNICODE
1153         wxWX2MBbuf buf = tmp.mbc_str();
1154         const char *txt = buf;
1155         size_t txtlen = strlen(buf);
1156     #else
1157         const char *txt = tmp;
1158         size_t txtlen = tmp.length();
1159     #endif
1160
1161         // use the attributes from style which are set in it and fall back
1162         // first to the default style and then to the text control default
1163         // colours for the others
1164         wxGtkTextInsert(m_text,
1165                         wxTextAttr::Combine(style, m_defaultStyle, this),
1166                         txt,
1167                         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
1173         return true;
1174     }
1175
1176     // else single line
1177     // cannot do this for GTK+'s Entry widget
1178     return false;
1179 }
1180
1181 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1182 {
1183     gtk_widget_modify_style(m_text, style);
1184 }
1185
1186 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1187 {
1188     Cut();
1189 }
1190
1191 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1192 {
1193     Copy();
1194 }
1195
1196 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1197 {
1198     Paste();
1199 }
1200
1201 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1202 {
1203     Undo();
1204 }
1205
1206 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1207 {
1208     Redo();
1209 }
1210
1211 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1212 {
1213     event.Enable( CanCut() );
1214 }
1215
1216 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1217 {
1218     event.Enable( CanCopy() );
1219 }
1220
1221 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1222 {
1223     event.Enable( CanPaste() );
1224 }
1225
1226 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1227 {
1228     event.Enable( CanUndo() );
1229 }
1230
1231 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1232 {
1233     event.Enable( CanRedo() );
1234 }
1235
1236 void wxTextCtrl::OnInternalIdle()
1237 {
1238     wxCursor cursor = m_cursor;
1239     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1240
1241     if (cursor.Ok())
1242     {
1243         GdkWindow *window = (GdkWindow*) NULL;
1244         if (HasFlag(wxTE_MULTILINE))
1245             window = GTK_TEXT(m_text)->text_area;
1246         else
1247             window = GTK_ENTRY(m_text)->text_area;
1248
1249         if (window)
1250             gdk_window_set_cursor( window, cursor.GetCursor() );
1251
1252         if (!g_globalCursor.Ok())
1253             cursor = *wxSTANDARD_CURSOR;
1254
1255         window = m_widget->window;
1256         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1257             gdk_window_set_cursor( window, cursor.GetCursor() );
1258     }
1259
1260     if (g_delayedFocus == this)
1261     {
1262         if (GTK_WIDGET_REALIZED(m_widget))
1263         {
1264             gtk_widget_grab_focus( m_widget );
1265             g_delayedFocus = NULL;
1266         }
1267     }
1268
1269     if (wxUpdateUIEvent::CanUpdate(this))
1270         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1271 }
1272
1273 wxSize wxTextCtrl::DoGetBestSize() const
1274 {
1275     // FIXME should be different for multi-line controls...
1276     wxSize ret( wxControl::DoGetBestSize() );
1277     wxSize best(80, ret.y);
1278     CacheBestSize(best);
1279     return best;
1280 }
1281
1282 // ----------------------------------------------------------------------------
1283 // freeze/thaw
1284 // ----------------------------------------------------------------------------
1285
1286 void wxTextCtrl::Freeze()
1287 {
1288     if ( HasFlag(wxTE_MULTILINE) )
1289     {
1290         gtk_text_freeze(GTK_TEXT(m_text));
1291     }
1292 }
1293
1294 void wxTextCtrl::Thaw()
1295 {
1296     if ( HasFlag(wxTE_MULTILINE) )
1297     {
1298         GTK_TEXT(m_text)->vadj->value = 0.0;
1299
1300         gtk_text_thaw(GTK_TEXT(m_text));
1301     }
1302 }
1303
1304 // ----------------------------------------------------------------------------
1305 // scrolling
1306 // ----------------------------------------------------------------------------
1307
1308 GtkAdjustment *wxTextCtrl::GetVAdj() const
1309 {
1310     if ( !IsMultiLine() )
1311         return NULL;
1312
1313     return GTK_TEXT(m_text)->vadj;
1314 }
1315
1316 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1317 {
1318     float value = adj->value + diff;
1319
1320     if ( value < 0 )
1321         value = 0;
1322
1323     float upper = adj->upper - adj->page_size;
1324     if ( value > upper )
1325         value = upper;
1326
1327     // did we noticeably change the scroll position?
1328     if ( fabs(adj->value - value) < 0.2 )
1329     {
1330         // well, this is what Robert does in wxScrollBar, so it must be good...
1331         return false;
1332     }
1333
1334     adj->value = value;
1335     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1336
1337     return true;
1338 }
1339
1340 bool wxTextCtrl::ScrollLines(int lines)
1341 {
1342     GtkAdjustment *adj = GetVAdj();
1343     if ( !adj )
1344         return false;
1345
1346     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1347     int diff = 10*lines;
1348
1349     return DoScroll(adj, diff);
1350 }
1351
1352 bool wxTextCtrl::ScrollPages(int pages)
1353 {
1354     GtkAdjustment *adj = GetVAdj();
1355     if ( !adj )
1356         return false;
1357
1358     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1359 }
1360
1361
1362 // static
1363 wxVisualAttributes
1364 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1365 {
1366     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1367 }