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/app.h"
  17     #include "wx/intl.h"
  18     #include "wx/log.h"
  19     #include "wx/utils.h"
  20     #include "wx/panel.h"
  21     #include "wx/settings.h"
  22     #include "wx/math.h"
  23 #endif
  24
  25 #include "wx/strconv.h"
  26 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <ctype.h>
  31
  32 #include "wx/gtk1/private.h"
  33 #include <gdk/gdkkeysyms.h>
  34
  35 //-----------------------------------------------------------------------------
  36 // idle system
  37 //-----------------------------------------------------------------------------
  38
  39 extern void wxapp_install_idle_handler();
  40 extern bool g_isIdle;
  41
  42 //-----------------------------------------------------------------------------
  43 // data
  44 //-----------------------------------------------------------------------------
  45
  46 extern wxCursor   g_globalCursor;
  47 extern wxWindowGTK *g_delayedFocus;
  48
  49 // ----------------------------------------------------------------------------
  50 // helpers
  51 // ----------------------------------------------------------------------------
  52
  53 extern "C" {
  54 static void wxGtkTextInsert(GtkWidget *text,
  55                             const wxTextAttr& attr,
  56                             const char *txt,
  57                             size_t len)
  58 {
  59     wxFont tmpFont;
  60     GdkFont *font;
  61     if (attr.HasFont())
  62     {
  63         tmpFont = attr.GetFont();
  64
  65         // FIXME: if this crashes because tmpFont goes out of scope and the GdkFont is
  66         // deleted, then we need to call gdk_font_ref on font.
  67         // This is because attr.GetFont() now returns a temporary font since wxTextAttr
  68         // no longer stores a wxFont object, for efficiency.
  69
  70         font = tmpFont.GetInternalFont();
  71     }
  72     else
  73         font  = NULL;
  74
  75     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  76                                            : NULL;
  77
  78     GdkColor *colBg = attr.HasBackgroundColour()
  79                         ? attr.GetBackgroundColour().GetColor()
  80                         : NULL;
  81
  82     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  83 }
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // "insert_text" for GtkEntry
  88 // ----------------------------------------------------------------------------
  89
  90 extern "C" {
  91 static void
  92 gtk_insert_text_callback(GtkEditable *editable,
  93                          const gchar *WXUNUSED(new_text),
  94                          gint WXUNUSED(new_text_length),
  95                          gint *WXUNUSED(position),
  96                          wxTextCtrl *win)
  97 {
  98     if (g_isIdle)
  99         wxapp_install_idle_handler();
 100
 101     // we should only be called if we have a max len limit at all
 102     GtkEntry *entry = GTK_ENTRY (editable);
 103
 104     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
 105
 106     // check that we don't overflow the max length limit
 107     //
 108     // FIXME: this doesn't work when we paste a string which is going to be
 109     //        truncated
 110     if ( entry->text_length == entry->text_max_length )
 111     {
 112         // we don't need to run the base class version at all
 113         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 114
 115         // remember that the next changed signal is to be ignored to avoid
 116         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 117         win->IgnoreNextTextUpdate();
 118
 119         // and generate the correct one ourselves
 120         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 121         event.SetEventObject(win);
 122         event.SetString(win->GetValue());
 123         win->HandleWindowEvent( event );
 124     }
 125 }
 126 }
 127
 128 //-----------------------------------------------------------------------------
 129 //  "changed"
 130 //-----------------------------------------------------------------------------
 131
 132 extern "C" {
 133 static void
 134 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 135 {
 136     if ( win->IgnoreTextUpdate() )
 137         return;
 138
 139     if (!win->m_hasVMT) return;
 140
 141     if (g_isIdle)
 142         wxapp_install_idle_handler();
 143
 144     win->SetModified();
 145     win->UpdateFontIfNeeded();
 146
 147     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 148     event.SetEventObject( win );
 149     win->HandleWindowEvent( event );
 150 }
 151 }
 152
 153 //-----------------------------------------------------------------------------
 154 // "changed" from vertical scrollbar
 155 //-----------------------------------------------------------------------------
 156
 157 extern "C" {
 158 static void
 159 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 160 {
 161     if (!win->m_hasVMT) return;
 162
 163     if (g_isIdle)
 164         wxapp_install_idle_handler();
 165
 166     win->CalculateScrollbar();
 167 }
 168 }
 169
 170 // ----------------------------------------------------------------------------
 171 // redraw callback for multiline text
 172 // ----------------------------------------------------------------------------
 173
 174 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 175 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 176 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 177 // don't do anything if we're inside wxYield()
 178
 179 extern "C" {
 180     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 181 }
 182
 183 static GtkDrawCallback gs_gtk_text_draw = NULL;
 184
 185 extern "C" {
 186 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 187 {
 188     if ( !wxTheApp->IsYielding() )
 189     {
 190         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 191                      _T("infinite recursion in wxgtk_text_draw aborted") );
 192
 193         gs_gtk_text_draw(widget, rect);
 194     }
 195 }
 196 }
 197
 198 //-----------------------------------------------------------------------------
 199 //  wxTextCtrl
 200 //-----------------------------------------------------------------------------
 201
 202 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 203
 204 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 205     EVT_CHAR(wxTextCtrl::OnChar)
 206
 207     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 208     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 209     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 210     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 211     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 212
 213     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 214     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 215     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 216     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 217     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 218 END_EVENT_TABLE()
 219
 220 void wxTextCtrl::Init()
 221 {
 222     m_ignoreNextUpdate =
 223     m_modified = false;
 224     SetUpdateFont(false);
 225     m_text =
 226     m_vScrollbar = NULL;
 227 }
 228
 229 wxTextCtrl::~wxTextCtrl()
 230 {
 231 }
 232
 233 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 234                         wxWindowID id,
 235                         const wxString &value,
 236                         const wxPoint &pos,
 237                         const wxSize &size,
 238                         long style,
 239                         const wxValidator& validator,
 240                         const wxString &name )
 241 {
 242     Init();
 243
 244     Create( parent, id, value, pos, size, style, validator, name );
 245 }
 246
 247 bool wxTextCtrl::Create( wxWindow *parent,
 248                          wxWindowID id,
 249                          const wxString &value,
 250                          const wxPoint &pos,
 251                          const wxSize &size,
 252                          long style,
 253                          const wxValidator& validator,
 254                          const wxString &name )
 255 {
 256     m_needParent = true;
 257     m_acceptsFocus = true;
 258
 259     if (!PreCreation( parent, pos, size ) ||
 260         !CreateBase( parent, id, pos, size, style, validator, name ))
 261     {
 262         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 263         return false;
 264     }
 265
 266
 267     m_vScrollbarVisible = false;
 268
 269     bool multi_line = (style & wxTE_MULTILINE) != 0;
 270
 271     if (multi_line)
 272     {
 273         // create our control ...
 274         m_text = gtk_text_new( NULL, NULL );
 275
 276         // ... and put into the upper left hand corner of the table
 277         bool bHasHScrollbar = false;
 278         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 279         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 280         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 281                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 282                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 283                        0, 0);
 284
 285         // always wrap words
 286         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 287
 288         // finally, put the vertical scrollbar in the upper right corner
 289         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 290         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 291         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 292                      GTK_FILL,
 293                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 294                      0, 0);
 295     }
 296     else
 297     {
 298         // a single-line text control: no need for scrollbars
 299         m_widget =
 300         m_text = gtk_entry_new();
 301     }
 302
 303     m_parent->DoAddChild( this );
 304
 305     m_focusWidget = m_text;
 306
 307     PostCreation(size);
 308
 309     if (multi_line)
 310         gtk_widget_show(m_text);
 311
 312     if (multi_line)
 313     {
 314         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 315           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 316
 317         // only initialize gs_gtk_text_draw once, starting from the next the
 318         // klass::draw will already be wxgtk_text_draw
 319         if ( !gs_gtk_text_draw )
 320         {
 321             GtkDrawCallback&
 322                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 323
 324             gs_gtk_text_draw = draw;
 325
 326             draw = wxgtk_text_draw;
 327         }
 328     }
 329
 330     if (!value.empty())
 331     {
 332 #if !GTK_CHECK_VERSION(1, 2, 0)
 333         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 334         // gtk_editable_insert_text()
 335         gtk_widget_realize(m_text);
 336 #endif // GTK 1.0
 337
 338         gint tmp = 0;
 339 #if wxUSE_UNICODE
 340         wxWX2MBbuf val = value.mbc_str();
 341         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 342 #else
 343         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 344 #endif
 345
 346         if (multi_line)
 347         {
 348             // Bring editable's cursor uptodate. Bug in GTK.
 349             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 350         }
 351     }
 352
 353     if (style & wxTE_PASSWORD)
 354     {
 355         if (!multi_line)
 356             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 357     }
 358
 359     if (style & wxTE_READONLY)
 360     {
 361         if (!multi_line)
 362             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 363     }
 364     else
 365     {
 366         if (multi_line)
 367             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 368     }
 369
 370     // We want to be notified about text changes.
 371     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 372         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 373
 374     m_cursor = wxCursor( wxCURSOR_IBEAM );
 375
 376     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 377     SetDefaultStyle( attrDef );
 378
 379     return true;
 380 }
 381
 382
 383 void wxTextCtrl::CalculateScrollbar()
 384 {
 385     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 386
 387     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 388
 389     if (adj->upper - adj->page_size < 0.8)
 390     {
 391         if (m_vScrollbarVisible)
 392         {
 393             gtk_widget_hide( m_vScrollbar );
 394             m_vScrollbarVisible = false;
 395         }
 396     }
 397     else
 398     {
 399         if (!m_vScrollbarVisible)
 400         {
 401             gtk_widget_show( m_vScrollbar );
 402             m_vScrollbarVisible = true;
 403         }
 404     }
 405 }
 406
 407 wxString wxTextCtrl::GetValue() const
 408 {
 409     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 410
 411     wxString tmp;
 412     if (m_windowStyle & wxTE_MULTILINE)
 413     {
 414         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 415         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 416         tmp = text;
 417         g_free( text );
 418     }
 419     else
 420     {
 421         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 422     }
 423
 424     return tmp;
 425 }
 426
 427 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 428 {
 429     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 430
 431     if ( !(flags & SetValue_SendEvent) )
 432     {
 433         // do not generate events
 434         IgnoreNextTextUpdate();
 435     }
 436
 437     if (m_windowStyle & wxTE_MULTILINE)
 438     {
 439         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 440         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 441         len = 0;
 442         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 443     }
 444     else
 445     {
 446         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 447     }
 448
 449     // GRG, Jun/2000: Changed this after a lot of discussion in
 450     //   the lists. wxWidgets 2.2 will have a set of flags to
 451     //   customize this behaviour.
 452     SetInsertionPoint(0);
 453
 454     m_modified = false;
 455 }
 456
 457 void wxTextCtrl::WriteText( const wxString &text )
 458 {
 459     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 460
 461     if ( text.empty() )
 462         return;
 463
 464     // gtk_text_changed_callback() will set m_modified to true but m_modified
 465     // shouldn't be changed by the program writing to the text control itself,
 466     // so save the old value and restore when we're done
 467     bool oldModified = m_modified;
 468
 469     if ( m_windowStyle & wxTE_MULTILINE )
 470     {
 471         // After cursor movements, gtk_text_get_point() is wrong by one.
 472         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 473
 474         // always use m_defaultStyle, even if it is empty as otherwise
 475         // resetting the style and appending some more text wouldn't work: if
 476         // we don't specify the style explicitly, the old style would be used
 477         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 478         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 479
 480         // we called wxGtkTextInsert with correct font, no need to do anything
 481         // in UpdateFontIfNeeded() any longer
 482         if ( !text.empty() )
 483         {
 484             SetUpdateFont(false);
 485         }
 486
 487         // Bring editable's cursor back uptodate.
 488         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 489     }
 490     else // single line
 491     {
 492         // First remove the selection if there is one
 493         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 494
 495         // This moves the cursor pos to behind the inserted text.
 496         gint len = GET_EDITABLE_POS(m_text);
 497
 498         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 499
 500         // Bring entry's cursor uptodate.
 501         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 502     }
 503
 504     m_modified = oldModified;
 505 }
 506
 507 void wxTextCtrl::AppendText( const wxString &text )
 508 {
 509     SetInsertionPointEnd();
 510     WriteText( text );
 511 }
 512
 513 wxString wxTextCtrl::GetLineText( long lineNo ) const
 514 {
 515     if (m_windowStyle & wxTE_MULTILINE)
 516     {
 517         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 518         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 519
 520         if (text)
 521         {
 522             wxString buf;
 523             long i;
 524             int currentLine = 0;
 525             for (i = 0; currentLine != lineNo && text[i]; i++ )
 526                 if (text[i] == '\n')
 527             currentLine++;
 528             // Now get the text
 529             int j;
 530             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 531                 buf += text[i];
 532
 533             g_free( text );
 534             return buf;
 535         }
 536         else
 537         {
 538             return wxEmptyString;
 539         }
 540     }
 541     else
 542     {
 543         if (lineNo == 0) return GetValue();
 544         return wxEmptyString;
 545     }
 546 }
 547
 548 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 549 {
 550   /* If you implement this, don't forget to update the documentation!
 551    * (file docs/latex/wx/text.tex) */
 552     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 553 }
 554
 555 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 556 {
 557     if ( m_windowStyle & wxTE_MULTILINE )
 558     {
 559         wxString text = GetValue();
 560
 561         // cast to prevent warning. But pos really should've been unsigned.
 562         if( (unsigned long)pos > text.length()  )
 563             return false;
 564
 565         *x=0;   // First Col
 566         *y=0;   // First Line
 567
 568         const wxChar* stop = text.c_str() + pos;
 569         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 570         {
 571             if (*p == wxT('\n'))
 572             {
 573                 (*y)++;
 574                 *x=0;
 575             }
 576             else
 577                 (*x)++;
 578         }
 579     }
 580     else // single line control
 581     {
 582         if ( pos <= GTK_ENTRY(m_text)->text_length )
 583         {
 584             *y = 0;
 585             *x = pos;
 586         }
 587         else
 588         {
 589             // index out of bounds
 590             return false;
 591         }
 592     }
 593
 594     return true;
 595 }
 596
 597 long wxTextCtrl::XYToPosition(long x, long y ) const
 598 {
 599     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 600
 601     long pos=0;
 602     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 603
 604     pos += x;
 605     return pos;
 606 }
 607
 608 int wxTextCtrl::GetLineLength(long lineNo) const
 609 {
 610     wxString str = GetLineText (lineNo);
 611     return (int) str.length();
 612 }
 613
 614 int wxTextCtrl::GetNumberOfLines() const
 615 {
 616     if (m_windowStyle & wxTE_MULTILINE)
 617     {
 618         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 619         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 620
 621         if (text)
 622         {
 623             int currentLine = 0;
 624             for (int i = 0; i < len; i++ )
 625             {
 626                 if (text[i] == '\n')
 627                     currentLine++;
 628             }
 629             g_free( text );
 630
 631             // currentLine is 0 based, add 1 to get number of lines
 632             return currentLine + 1;
 633         }
 634         else
 635         {
 636             return 0;
 637         }
 638     }
 639     else
 640     {
 641         return 1;
 642     }
 643 }
 644
 645 void wxTextCtrl::SetInsertionPoint( long pos )
 646 {
 647     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 648
 649     if ( IsMultiLine() )
 650     {
 651         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 652           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 653
 654         /* we fake a set_point by inserting and deleting. as the user
 655            isn't supposed to get to know about this non-sense, we
 656            disconnect so that no events are sent to the user program. */
 657
 658         gint tmp = (gint)pos;
 659         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 660         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 661
 662         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 663           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 664
 665         // bring editable's cursor uptodate. Bug in GTK.
 666         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 667     }
 668     else
 669     {
 670         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 671
 672         // Bring editable's cursor uptodate. Bug in GTK.
 673         SET_EDITABLE_POS(m_text, (guint32)pos);
 674     }
 675 }
 676
 677 void wxTextCtrl::SetInsertionPointEnd()
 678 {
 679     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 680
 681     if (m_windowStyle & wxTE_MULTILINE)
 682     {
 683         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 684     }
 685     else
 686     {
 687         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 688     }
 689 }
 690
 691 void wxTextCtrl::SetEditable( bool editable )
 692 {
 693     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 694
 695     if (m_windowStyle & wxTE_MULTILINE)
 696     {
 697         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 698     }
 699     else
 700     {
 701         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 702     }
 703 }
 704
 705 void wxTextCtrl::DoEnable( bool enable )
 706 {
 707     if (m_windowStyle & wxTE_MULTILINE)
 708     {
 709         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 710     }
 711     else
 712     {
 713         gtk_widget_set_sensitive( m_text, enable );
 714     }
 715 }
 716
 717 // wxGTK-specific: called recursively by Enable,
 718 // to give widgets an oppprtunity to correct their colours after they
 719 // have been changed by Enable
 720 void wxTextCtrl::OnEnabled( bool WXUNUSED(enable) )
 721 {
 722     if ( IsSingleLine() )
 723         return;
 724
 725     // If we have a custom background colour, we use this colour in both
 726     // disabled and enabled mode, or we end up with a different colour under the
 727     // text.
 728     wxColour oldColour = GetBackgroundColour();
 729     if (oldColour.Ok())
 730     {
 731         // Need to set twice or it'll optimize the useful stuff out
 732         if (oldColour == * wxWHITE)
 733             SetBackgroundColour(*wxBLACK);
 734         else
 735             SetBackgroundColour(*wxWHITE);
 736         SetBackgroundColour(oldColour);
 737     }
 738 }
 739
 740 void wxTextCtrl::MarkDirty()
 741 {
 742     m_modified = true;
 743 }
 744
 745 void wxTextCtrl::DiscardEdits()
 746 {
 747     m_modified = false;
 748 }
 749
 750 // ----------------------------------------------------------------------------
 751 // max text length support
 752 // ----------------------------------------------------------------------------
 753
 754 void wxTextCtrl::IgnoreNextTextUpdate()
 755 {
 756     m_ignoreNextUpdate = true;
 757 }
 758
 759 bool wxTextCtrl::IgnoreTextUpdate()
 760 {
 761     if ( m_ignoreNextUpdate )
 762     {
 763         m_ignoreNextUpdate = false;
 764
 765         return true;
 766     }
 767
 768     return false;
 769 }
 770
 771 void wxTextCtrl::SetMaxLength(unsigned long len)
 772 {
 773     if ( !HasFlag(wxTE_MULTILINE) )
 774     {
 775         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 776
 777         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 778         // we had tried to enter more text than allowed by max text length and
 779         // the text wasn't really changed
 780         //
 781         // to detect this and generate TEXT_MAXLEN event instead of
 782         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 783         //
 784         // when max len is set to 0 we disconnect our handler as it means that
 785         // we shouldn't check anything any more
 786         if ( len )
 787         {
 788             gtk_signal_connect( GTK_OBJECT(m_text),
 789                                 "insert_text",
 790                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 791                                 (gpointer)this);
 792         }
 793         else // no checking
 794         {
 795             gtk_signal_disconnect_by_func
 796             (
 797                 GTK_OBJECT(m_text),
 798                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 799                 (gpointer)this
 800             );
 801         }
 802     }
 803 }
 804
 805 void wxTextCtrl::SetSelection( long from, long to )
 806 {
 807     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 808
 809     if (from == -1 && to == -1)
 810     {
 811         from = 0;
 812         to = GetValue().length();
 813     }
 814
 815     if ( (m_windowStyle & wxTE_MULTILINE) &&
 816          !GTK_TEXT(m_text)->line_start_cache )
 817     {
 818         // tell the programmer that it didn't work
 819         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 820         return;
 821     }
 822
 823     if (m_windowStyle & wxTE_MULTILINE)
 824     {
 825         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 826     }
 827     else
 828     {
 829         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 830     }
 831 }
 832
 833 void wxTextCtrl::ShowPosition( long pos )
 834 {
 835     if (m_windowStyle & wxTE_MULTILINE)
 836     {
 837         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 838         float totalLines =  (float) GetNumberOfLines();
 839         long posX;
 840         long posY;
 841         PositionToXY(pos, &posX, &posY);
 842         float posLine = (float) posY;
 843         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 844         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 845     }
 846 }
 847
 848 long wxTextCtrl::GetInsertionPoint() const
 849 {
 850     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 851     return (long) GET_EDITABLE_POS(m_text);
 852 }
 853
 854 wxTextPos wxTextCtrl::GetLastPosition() const
 855 {
 856     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 857
 858     int pos = 0;
 859
 860     if (m_windowStyle & wxTE_MULTILINE)
 861     {
 862         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 863     }
 864     else
 865     {
 866         pos = GTK_ENTRY(m_text)->text_length;
 867     }
 868
 869     return (long)pos;
 870 }
 871
 872 void wxTextCtrl::Remove( long from, long to )
 873 {
 874     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 875     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 876 }
 877
 878 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 879 {
 880     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 881
 882     Remove( from, to );
 883
 884     if (!value.empty())
 885     {
 886         gint pos = (gint)from;
 887 #if wxUSE_UNICODE
 888         wxWX2MBbuf buf = value.mbc_str();
 889         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 890 #else
 891         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 892 #endif // wxUSE_UNICODE
 893     }
 894 }
 895
 896 void wxTextCtrl::Cut()
 897 {
 898     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 899     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 900 }
 901
 902 void wxTextCtrl::Copy()
 903 {
 904     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 905     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 906 }
 907
 908 void wxTextCtrl::Paste()
 909 {
 910     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 911     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 912 }
 913
 914 // Undo/redo
 915 void wxTextCtrl::Undo()
 916 {
 917     // TODO
 918     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 919 }
 920
 921 void wxTextCtrl::Redo()
 922 {
 923     // TODO
 924     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 925 }
 926
 927 bool wxTextCtrl::CanUndo() const
 928 {
 929     // TODO
 930     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 931     return false;
 932 }
 933
 934 bool wxTextCtrl::CanRedo() const
 935 {
 936     // TODO
 937     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 938     return false;
 939 }
 940
 941 // If the return values from and to are the same, there is no
 942 // selection.
 943 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 944 {
 945     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 946
 947     gint from = -1;
 948     gint to = -1;
 949     bool haveSelection = false;
 950
 951      if ( (GTK_EDITABLE(m_text)->has_selection) )
 952      {
 953          haveSelection = true;
 954          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 955          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 956      }
 957
 958      if (! haveSelection )
 959           from = to = GetInsertionPoint();
 960
 961      if ( from > to )
 962      {
 963          // exchange them to be compatible with wxMSW
 964          gint tmp = from;
 965          from = to;
 966          to = tmp;
 967      }
 968
 969     if ( fromOut )
 970         *fromOut = from;
 971     if ( toOut )
 972         *toOut = to;
 973 }
 974
 975
 976 bool wxTextCtrl::IsEditable() const
 977 {
 978     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 979     return GTK_EDITABLE(m_text)->editable;
 980 }
 981
 982 bool wxTextCtrl::IsModified() const
 983 {
 984     return m_modified;
 985 }
 986
 987 void wxTextCtrl::Clear()
 988 {
 989     SetValue( wxEmptyString );
 990 }
 991
 992 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 993 {
 994     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 995
 996     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 997     {
 998         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 999         event.SetEventObject(this);
1000         event.SetString(GetValue());
1001         if (HandleWindowEvent(event)) return;
1002     }
1003
1004     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1005     {
1006         // This will invoke the dialog default action, such
1007         // as the clicking the default button.
1008
1009         wxWindow *top_frame = m_parent;
1010         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1011             top_frame = top_frame->GetParent();
1012
1013         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1014         {
1015             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1016
1017             if (window->default_widget)
1018             {
1019                 gtk_widget_activate (window->default_widget);
1020                 return;
1021             }
1022         }
1023     }
1024
1025     key_event.Skip();
1026 }
1027
1028 GtkWidget* wxTextCtrl::GetConnectWidget()
1029 {
1030     return GTK_WIDGET(m_text);
1031 }
1032
1033 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1034 {
1035     if (m_windowStyle & wxTE_MULTILINE)
1036     {
1037         return (window == GTK_TEXT(m_text)->text_area);
1038     }
1039     else
1040     {
1041         return (window == GTK_ENTRY(m_text)->text_area);
1042     }
1043 }
1044
1045 // the font will change for subsequent text insertiongs
1046 bool wxTextCtrl::SetFont( const wxFont &font )
1047 {
1048     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1049
1050     if ( !wxTextCtrlBase::SetFont(font) )
1051     {
1052         // font didn't change, nothing to do
1053         return false;
1054     }
1055
1056     if ( m_windowStyle & wxTE_MULTILINE )
1057     {
1058         SetUpdateFont(true);
1059
1060         m_defaultStyle.SetFont(font);
1061
1062         ChangeFontGlobally();
1063     }
1064
1065     return true;
1066 }
1067
1068 void wxTextCtrl::ChangeFontGlobally()
1069 {
1070     // this method is very inefficient and hence should be called as rarely as
1071     // possible!
1072     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1073
1074                   _T("shouldn't be called for single line controls") );
1075
1076     wxString value = GetValue();
1077     if ( !value.empty() )
1078     {
1079         SetUpdateFont(false);
1080
1081         Clear();
1082         AppendText(value);
1083     }
1084 }
1085
1086 void wxTextCtrl::UpdateFontIfNeeded()
1087 {
1088     if ( m_updateFont )
1089         ChangeFontGlobally();
1090 }
1091
1092 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1093 {
1094     if ( !wxControl::SetForegroundColour(colour) )
1095         return false;
1096
1097     // update default fg colour too
1098     m_defaultStyle.SetTextColour(colour);
1099
1100     return true;
1101 }
1102
1103 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1104 {
1105     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1106
1107     if ( !wxControl::SetBackgroundColour( colour ) )
1108         return false;
1109
1110     if (!m_widget->window)
1111         return false;
1112
1113     if (!m_backgroundColour.Ok())
1114         return false;
1115
1116     if (m_windowStyle & wxTE_MULTILINE)
1117     {
1118         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1119         if (!window)
1120             return false;
1121         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1122         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1123         gdk_window_clear( window );
1124     }
1125
1126     // change active background color too
1127     m_defaultStyle.SetBackgroundColour( colour );
1128
1129     return true;
1130 }
1131
1132 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1133 {
1134     if ( m_windowStyle & wxTE_MULTILINE )
1135     {
1136         if ( style.IsDefault() )
1137         {
1138             // nothing to do
1139             return true;
1140         }
1141
1142         // VERY dirty way to do that - removes the required text and re-adds it
1143         // with styling (FIXME)
1144
1145         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1146
1147         wxCHECK_MSG( start >= 0 && end <= l, false,
1148                      _T("invalid range in wxTextCtrl::SetStyle") );
1149
1150         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1151         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1152         wxString tmp(text,*wxConvCurrent);
1153         g_free( text );
1154
1155         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1156         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1157
1158     #if wxUSE_UNICODE
1159         wxWX2MBbuf buf = tmp.mbc_str();
1160         const char *txt = buf;
1161         size_t txtlen = strlen(buf);
1162     #else
1163         const char *txt = tmp;
1164         size_t txtlen = tmp.length();
1165     #endif
1166
1167         // use the attributes from style which are set in it and fall back
1168         // first to the default style and then to the text control default
1169         // colours for the others
1170         wxGtkTextInsert(m_text,
1171                         wxTextAttr::Combine(style, m_defaultStyle, this),
1172                         txt,
1173                         txtlen);
1174
1175         /* does not seem to help under GTK+ 1.2 !!!
1176         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1177         SetInsertionPoint( old_pos );
1178
1179         return true;
1180     }
1181
1182     // else single line
1183     // cannot do this for GTK+'s Entry widget
1184     return false;
1185 }
1186
1187 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1188 {
1189     gtk_widget_modify_style(m_text, style);
1190 }
1191
1192 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1193 {
1194     Cut();
1195 }
1196
1197 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1198 {
1199     Copy();
1200 }
1201
1202 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1203 {
1204     Paste();
1205 }
1206
1207 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1208 {
1209     Undo();
1210 }
1211
1212 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1213 {
1214     Redo();
1215 }
1216
1217 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1218 {
1219     event.Enable( CanCut() );
1220 }
1221
1222 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1223 {
1224     event.Enable( CanCopy() );
1225 }
1226
1227 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1228 {
1229     event.Enable( CanPaste() );
1230 }
1231
1232 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1233 {
1234     event.Enable( CanUndo() );
1235 }
1236
1237 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1238 {
1239     event.Enable( CanRedo() );
1240 }
1241
1242 void wxTextCtrl::OnInternalIdle()
1243 {
1244     wxCursor cursor = m_cursor;
1245     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1246
1247     if (cursor.Ok())
1248     {
1249         GdkWindow *window = NULL;
1250         if (HasFlag(wxTE_MULTILINE))
1251             window = GTK_TEXT(m_text)->text_area;
1252         else
1253             window = GTK_ENTRY(m_text)->text_area;
1254
1255         if (window)
1256             gdk_window_set_cursor( window, cursor.GetCursor() );
1257
1258         if (!g_globalCursor.Ok())
1259             cursor = *wxSTANDARD_CURSOR;
1260
1261         window = m_widget->window;
1262         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1263             gdk_window_set_cursor( window, cursor.GetCursor() );
1264     }
1265
1266     if (g_delayedFocus == this)
1267     {
1268         if (GTK_WIDGET_REALIZED(m_widget))
1269         {
1270             gtk_widget_grab_focus( m_widget );
1271             g_delayedFocus = NULL;
1272         }
1273     }
1274
1275     if (wxUpdateUIEvent::CanUpdate(this))
1276         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1277 }
1278
1279 wxSize wxTextCtrl::DoGetBestSize() const
1280 {
1281     // FIXME should be different for multi-line controls...
1282     wxSize ret( wxControl::DoGetBestSize() );
1283     wxSize best(80, ret.y);
1284     CacheBestSize(best);
1285     return best;
1286 }
1287
1288 // ----------------------------------------------------------------------------
1289 // freeze/thaw
1290 // ----------------------------------------------------------------------------
1291
1292 void wxTextCtrl::DoFreeze()
1293 {
1294     if ( HasFlag(wxTE_MULTILINE) )
1295     {
1296         gtk_text_freeze(GTK_TEXT(m_text));
1297     }
1298 }
1299
1300 void wxTextCtrl::DoThaw()
1301 {
1302     if ( HasFlag(wxTE_MULTILINE) )
1303     {
1304         GTK_TEXT(m_text)->vadj->value = 0.0;
1305
1306         gtk_text_thaw(GTK_TEXT(m_text));
1307     }
1308 }
1309
1310 // ----------------------------------------------------------------------------
1311 // scrolling
1312 // ----------------------------------------------------------------------------
1313
1314 GtkAdjustment *wxTextCtrl::GetVAdj() const
1315 {
1316     if ( !IsMultiLine() )
1317         return NULL;
1318
1319     return GTK_TEXT(m_text)->vadj;
1320 }
1321
1322 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1323 {
1324     float value = adj->value + diff;
1325
1326     if ( value < 0 )
1327         value = 0;
1328
1329     float upper = adj->upper - adj->page_size;
1330     if ( value > upper )
1331         value = upper;
1332
1333     // did we noticeably change the scroll position?
1334     if ( fabs(adj->value - value) < 0.2 )
1335     {
1336         // well, this is what Robert does in wxScrollBar, so it must be good...
1337         return false;
1338     }
1339
1340     adj->value = value;
1341     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1342
1343     return true;
1344 }
1345
1346 bool wxTextCtrl::ScrollLines(int lines)
1347 {
1348     GtkAdjustment *adj = GetVAdj();
1349     if ( !adj )
1350         return false;
1351
1352     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1353     int diff = 10*lines;
1354
1355     return DoScroll(adj, diff);
1356 }
1357
1358 bool wxTextCtrl::ScrollPages(int pages)
1359 {
1360     GtkAdjustment *adj = GetVAdj();
1361     if ( !adj )
1362         return false;
1363
1364     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1365 }
1366
1367
1368 // static
1369 wxVisualAttributes
1370 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1371 {
1372     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1373 }