src/gtk/textctrl.cpp

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