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     wxFont tmpFont;
  59     GdkFont *font;
  60     if (attr.HasFont())
  61     {
  62         tmpFont = attr.GetFont();
  63
  64         // FIXME: if this crashes because tmpFont goes out of scope and the GdkFont is
  65         // deleted, then we need to call gdk_font_ref on font.
  66         // This is because attr.GetFont() now returns a temporary font since wxTextAttr
  67         // no longer stores a wxFont object, for efficiency.
  68
  69         font = tmpFont.GetInternalFont();
  70     }
  71     else
  72         font  = NULL;
  73
  74     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  75                                            : NULL;
  76
  77     GdkColor *colBg = attr.HasBackgroundColour()
  78                         ? attr.GetBackgroundColour().GetColor()
  79                         : NULL;
  80
  81     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  82 }
  83 }
  84
  85 // ----------------------------------------------------------------------------
  86 // "insert_text" for GtkEntry
  87 // ----------------------------------------------------------------------------
  88
  89 extern "C" {
  90 static void
  91 gtk_insert_text_callback(GtkEditable *editable,
  92                          const gchar *WXUNUSED(new_text),
  93                          gint WXUNUSED(new_text_length),
  94                          gint *WXUNUSED(position),
  95                          wxTextCtrl *win)
  96 {
  97     if (g_isIdle)
  98         wxapp_install_idle_handler();
  99
 100     // we should only be called if we have a max len limit at all
 101     GtkEntry *entry = GTK_ENTRY (editable);
 102
 103     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
 104
 105     // check that we don't overflow the max length limit
 106     //
 107     // FIXME: this doesn't work when we paste a string which is going to be
 108     //        truncated
 109     if ( entry->text_length == entry->text_max_length )
 110     {
 111         // we don't need to run the base class version at all
 112         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 113
 114         // remember that the next changed signal is to be ignored to avoid
 115         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 116         win->IgnoreNextTextUpdate();
 117
 118         // and generate the correct one ourselves
 119         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 120         event.SetEventObject(win);
 121         event.SetString(win->GetValue());
 122         win->HandleWindowEvent( event );
 123     }
 124 }
 125 }
 126
 127 //-----------------------------------------------------------------------------
 128 //  "changed"
 129 //-----------------------------------------------------------------------------
 130
 131 extern "C" {
 132 static void
 133 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 134 {
 135     if ( win->IgnoreTextUpdate() )
 136         return;
 137
 138     if (!win->m_hasVMT) return;
 139
 140     if (g_isIdle)
 141         wxapp_install_idle_handler();
 142
 143     win->SetModified();
 144     win->UpdateFontIfNeeded();
 145
 146     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 147     event.SetEventObject( win );
 148     win->HandleWindowEvent( event );
 149 }
 150 }
 151
 152 //-----------------------------------------------------------------------------
 153 // "changed" from vertical scrollbar
 154 //-----------------------------------------------------------------------------
 155
 156 extern "C" {
 157 static void
 158 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 159 {
 160     if (!win->m_hasVMT) return;
 161
 162     if (g_isIdle)
 163         wxapp_install_idle_handler();
 164
 165     win->CalculateScrollbar();
 166 }
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // redraw callback for multiline text
 171 // ----------------------------------------------------------------------------
 172
 173 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 174 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 175 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 176 // don't do anything if we're inside wxYield()
 177
 178 extern bool wxIsInsideYield;
 179
 180 extern "C" {
 181     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 182 }
 183
 184 static GtkDrawCallback gs_gtk_text_draw = NULL;
 185
 186 extern "C" {
 187 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 188 {
 189     if ( !wxIsInsideYield )
 190     {
 191         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 192                      _T("infinite recursion in wxgtk_text_draw aborted") );
 193
 194         gs_gtk_text_draw(widget, rect);
 195     }
 196 }
 197 }
 198
 199 //-----------------------------------------------------------------------------
 200 //  wxTextCtrl
 201 //-----------------------------------------------------------------------------
 202
 203 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 204
 205 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 206     EVT_CHAR(wxTextCtrl::OnChar)
 207
 208     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 209     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 210     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 211     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 212     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 213
 214     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 215     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 216     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 217     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 218     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 219 END_EVENT_TABLE()
 220
 221 void wxTextCtrl::Init()
 222 {
 223     m_ignoreNextUpdate =
 224     m_modified = false;
 225     SetUpdateFont(false);
 226     m_text =
 227     m_vScrollbar = (GtkWidget *)NULL;
 228 }
 229
 230 wxTextCtrl::~wxTextCtrl()
 231 {
 232 }
 233
 234 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 235                         wxWindowID id,
 236                         const wxString &value,
 237                         const wxPoint &pos,
 238                         const wxSize &size,
 239                         long style,
 240                         const wxValidator& validator,
 241                         const wxString &name )
 242 {
 243     Init();
 244
 245     Create( parent, id, value, pos, size, style, validator, name );
 246 }
 247
 248 bool wxTextCtrl::Create( wxWindow *parent,
 249                          wxWindowID id,
 250                          const wxString &value,
 251                          const wxPoint &pos,
 252                          const wxSize &size,
 253                          long style,
 254                          const wxValidator& validator,
 255                          const wxString &name )
 256 {
 257     m_needParent = true;
 258     m_acceptsFocus = true;
 259
 260     if (!PreCreation( parent, pos, size ) ||
 261         !CreateBase( parent, id, pos, size, style, validator, name ))
 262     {
 263         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 264         return false;
 265     }
 266
 267
 268     m_vScrollbarVisible = false;
 269
 270     bool multi_line = (style & wxTE_MULTILINE) != 0;
 271
 272     if (multi_line)
 273     {
 274         // create our control ...
 275         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 276
 277         // ... and put into the upper left hand corner of the table
 278         bool bHasHScrollbar = false;
 279         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 280         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 281         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 282                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 283                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 284                        0, 0);
 285
 286         // always wrap words
 287         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 288
 289         // finally, put the vertical scrollbar in the upper right corner
 290         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 291         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 292         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 293                      GTK_FILL,
 294                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 295                      0, 0);
 296     }
 297     else
 298     {
 299         // a single-line text control: no need for scrollbars
 300         m_widget =
 301         m_text = gtk_entry_new();
 302     }
 303
 304     m_parent->DoAddChild( this );
 305
 306     m_focusWidget = m_text;
 307
 308     PostCreation(size);
 309
 310     if (multi_line)
 311         gtk_widget_show(m_text);
 312
 313     if (multi_line)
 314     {
 315         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 316           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 317
 318         // only initialize gs_gtk_text_draw once, starting from the next the
 319         // klass::draw will already be wxgtk_text_draw
 320         if ( !gs_gtk_text_draw )
 321         {
 322             GtkDrawCallback&
 323                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 324
 325             gs_gtk_text_draw = draw;
 326
 327             draw = wxgtk_text_draw;
 328         }
 329     }
 330
 331     if (!value.empty())
 332     {
 333 #if !GTK_CHECK_VERSION(1, 2, 0)
 334         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 335         // gtk_editable_insert_text()
 336         gtk_widget_realize(m_text);
 337 #endif // GTK 1.0
 338
 339         gint tmp = 0;
 340 #if wxUSE_UNICODE
 341         wxWX2MBbuf val = value.mbc_str();
 342         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 343 #else
 344         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 345 #endif
 346
 347         if (multi_line)
 348         {
 349             // Bring editable's cursor uptodate. Bug in GTK.
 350             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 351         }
 352     }
 353
 354     if (style & wxTE_PASSWORD)
 355     {
 356         if (!multi_line)
 357             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 358     }
 359
 360     if (style & wxTE_READONLY)
 361     {
 362         if (!multi_line)
 363             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 364     }
 365     else
 366     {
 367         if (multi_line)
 368             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 369     }
 370
 371     // We want to be notified about text changes.
 372     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 373         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 374
 375     m_cursor = wxCursor( wxCURSOR_IBEAM );
 376
 377     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 378     SetDefaultStyle( attrDef );
 379
 380     return true;
 381 }
 382
 383
 384 void wxTextCtrl::CalculateScrollbar()
 385 {
 386     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 387
 388     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 389
 390     if (adj->upper - adj->page_size < 0.8)
 391     {
 392         if (m_vScrollbarVisible)
 393         {
 394             gtk_widget_hide( m_vScrollbar );
 395             m_vScrollbarVisible = false;
 396         }
 397     }
 398     else
 399     {
 400         if (!m_vScrollbarVisible)
 401         {
 402             gtk_widget_show( m_vScrollbar );
 403             m_vScrollbarVisible = true;
 404         }
 405     }
 406 }
 407
 408 wxString wxTextCtrl::GetValue() const
 409 {
 410     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 411
 412     wxString tmp;
 413     if (m_windowStyle & wxTE_MULTILINE)
 414     {
 415         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 416         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 417         tmp = text;
 418         g_free( text );
 419     }
 420     else
 421     {
 422         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 423     }
 424
 425     return tmp;
 426 }
 427
 428 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 429 {
 430     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 431
 432     if ( !(flags & SetValue_SendEvent) )
 433     {
 434         // do not generate events
 435         IgnoreNextTextUpdate();
 436     }
 437
 438     if (m_windowStyle & wxTE_MULTILINE)
 439     {
 440         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 441         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 442         len = 0;
 443         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 444     }
 445     else
 446     {
 447         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 448     }
 449
 450     // GRG, Jun/2000: Changed this after a lot of discussion in
 451     //   the lists. wxWidgets 2.2 will have a set of flags to
 452     //   customize this behaviour.
 453     SetInsertionPoint(0);
 454
 455     m_modified = false;
 456 }
 457
 458 void wxTextCtrl::WriteText( const wxString &text )
 459 {
 460     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 461
 462     if ( text.empty() )
 463         return;
 464
 465     // gtk_text_changed_callback() will set m_modified to true but m_modified
 466     // shouldn't be changed by the program writing to the text control itself,
 467     // so save the old value and restore when we're done
 468     bool oldModified = m_modified;
 469
 470     if ( m_windowStyle & wxTE_MULTILINE )
 471     {
 472         // After cursor movements, gtk_text_get_point() is wrong by one.
 473         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 474
 475         // always use m_defaultStyle, even if it is empty as otherwise
 476         // resetting the style and appending some more text wouldn't work: if
 477         // we don't specify the style explicitly, the old style would be used
 478         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 479         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 480
 481         // we called wxGtkTextInsert with correct font, no need to do anything
 482         // in UpdateFontIfNeeded() any longer
 483         if ( !text.empty() )
 484         {
 485             SetUpdateFont(false);
 486         }
 487
 488         // Bring editable's cursor back uptodate.
 489         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 490     }
 491     else // single line
 492     {
 493         // First remove the selection if there is one
 494         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 495
 496         // This moves the cursor pos to behind the inserted text.
 497         gint len = GET_EDITABLE_POS(m_text);
 498
 499         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 500
 501         // Bring entry's cursor uptodate.
 502         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 503     }
 504
 505     m_modified = oldModified;
 506 }
 507
 508 void wxTextCtrl::AppendText( const wxString &text )
 509 {
 510     SetInsertionPointEnd();
 511     WriteText( text );
 512 }
 513
 514 wxString wxTextCtrl::GetLineText( long lineNo ) const
 515 {
 516     if (m_windowStyle & wxTE_MULTILINE)
 517     {
 518         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 519         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 520
 521         if (text)
 522         {
 523             wxString buf;
 524             long i;
 525             int currentLine = 0;
 526             for (i = 0; currentLine != lineNo && text[i]; i++ )
 527                 if (text[i] == '\n')
 528             currentLine++;
 529             // Now get the text
 530             int j;
 531             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 532                 buf += text[i];
 533
 534             g_free( text );
 535             return buf;
 536         }
 537         else
 538         {
 539             return wxEmptyString;
 540         }
 541     }
 542     else
 543     {
 544         if (lineNo == 0) return GetValue();
 545         return wxEmptyString;
 546     }
 547 }
 548
 549 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 550 {
 551   /* If you implement this, don't forget to update the documentation!
 552    * (file docs/latex/wx/text.tex) */
 553     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 554 }
 555
 556 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 557 {
 558     if ( m_windowStyle & wxTE_MULTILINE )
 559     {
 560         wxString text = GetValue();
 561
 562         // cast to prevent warning. But pos really should've been unsigned.
 563         if( (unsigned long)pos > text.length()  )
 564             return false;
 565
 566         *x=0;   // First Col
 567         *y=0;   // First Line
 568
 569         const wxChar* stop = text.c_str() + pos;
 570         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 571         {
 572             if (*p == wxT('\n'))
 573             {
 574                 (*y)++;
 575                 *x=0;
 576             }
 577             else
 578                 (*x)++;
 579         }
 580     }
 581     else // single line control
 582     {
 583         if ( pos <= GTK_ENTRY(m_text)->text_length )
 584         {
 585             *y = 0;
 586             *x = pos;
 587         }
 588         else
 589         {
 590             // index out of bounds
 591             return false;
 592         }
 593     }
 594
 595     return true;
 596 }
 597
 598 long wxTextCtrl::XYToPosition(long x, long y ) const
 599 {
 600     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 601
 602     long pos=0;
 603     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 604
 605     pos += x;
 606     return pos;
 607 }
 608
 609 int wxTextCtrl::GetLineLength(long lineNo) const
 610 {
 611     wxString str = GetLineText (lineNo);
 612     return (int) str.length();
 613 }
 614
 615 int wxTextCtrl::GetNumberOfLines() const
 616 {
 617     if (m_windowStyle & wxTE_MULTILINE)
 618     {
 619         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 620         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 621
 622         if (text)
 623         {
 624             int currentLine = 0;
 625             for (int i = 0; i < len; i++ )
 626             {
 627                 if (text[i] == '\n')
 628                     currentLine++;
 629             }
 630             g_free( text );
 631
 632             // currentLine is 0 based, add 1 to get number of lines
 633             return currentLine + 1;
 634         }
 635         else
 636         {
 637             return 0;
 638         }
 639     }
 640     else
 641     {
 642         return 1;
 643     }
 644 }
 645
 646 void wxTextCtrl::SetInsertionPoint( long pos )
 647 {
 648     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 649
 650     if ( IsMultiLine() )
 651     {
 652         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 653           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 654
 655         /* we fake a set_point by inserting and deleting. as the user
 656            isn't supposed to get to know about this non-sense, we
 657            disconnect so that no events are sent to the user program. */
 658
 659         gint tmp = (gint)pos;
 660         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 661         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 662
 663         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 664           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 665
 666         // bring editable's cursor uptodate. Bug in GTK.
 667         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 668     }
 669     else
 670     {
 671         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 672
 673         // Bring editable's cursor uptodate. Bug in GTK.
 674         SET_EDITABLE_POS(m_text, (guint32)pos);
 675     }
 676 }
 677
 678 void wxTextCtrl::SetInsertionPointEnd()
 679 {
 680     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 681
 682     if (m_windowStyle & wxTE_MULTILINE)
 683     {
 684         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 685     }
 686     else
 687     {
 688         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 689     }
 690 }
 691
 692 void wxTextCtrl::SetEditable( bool editable )
 693 {
 694     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 695
 696     if (m_windowStyle & wxTE_MULTILINE)
 697     {
 698         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 699     }
 700     else
 701     {
 702         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 703     }
 704 }
 705
 706 void wxTextCtrl::DoEnable( bool enable )
 707 {
 708     if (m_windowStyle & wxTE_MULTILINE)
 709     {
 710         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 711     }
 712     else
 713     {
 714         gtk_widget_set_sensitive( m_text, enable );
 715     }
 716 }
 717
 718 // wxGTK-specific: called recursively by Enable,
 719 // to give widgets an oppprtunity to correct their colours after they
 720 // have been changed by Enable
 721 void wxTextCtrl::OnEnabled( bool WXUNUSED(enable) )
 722 {
 723     if ( IsSingleLine() )
 724         return;
 725
 726     // If we have a custom background colour, we use this colour in both
 727     // disabled and enabled mode, or we end up with a different colour under the
 728     // text.
 729     wxColour oldColour = GetBackgroundColour();
 730     if (oldColour.Ok())
 731     {
 732         // Need to set twice or it'll optimize the useful stuff out
 733         if (oldColour == * wxWHITE)
 734             SetBackgroundColour(*wxBLACK);
 735         else
 736             SetBackgroundColour(*wxWHITE);
 737         SetBackgroundColour(oldColour);
 738     }
 739 }
 740
 741 void wxTextCtrl::MarkDirty()
 742 {
 743     m_modified = true;
 744 }
 745
 746 void wxTextCtrl::DiscardEdits()
 747 {
 748     m_modified = false;
 749 }
 750
 751 // ----------------------------------------------------------------------------
 752 // max text length support
 753 // ----------------------------------------------------------------------------
 754
 755 void wxTextCtrl::IgnoreNextTextUpdate()
 756 {
 757     m_ignoreNextUpdate = true;
 758 }
 759
 760 bool wxTextCtrl::IgnoreTextUpdate()
 761 {
 762     if ( m_ignoreNextUpdate )
 763     {
 764         m_ignoreNextUpdate = false;
 765
 766         return true;
 767     }
 768
 769     return false;
 770 }
 771
 772 void wxTextCtrl::SetMaxLength(unsigned long len)
 773 {
 774     if ( !HasFlag(wxTE_MULTILINE) )
 775     {
 776         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 777
 778         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 779         // we had tried to enter more text than allowed by max text length and
 780         // the text wasn't really changed
 781         //
 782         // to detect this and generate TEXT_MAXLEN event instead of
 783         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 784         //
 785         // when max len is set to 0 we disconnect our handler as it means that
 786         // we shouldn't check anything any more
 787         if ( len )
 788         {
 789             gtk_signal_connect( GTK_OBJECT(m_text),
 790                                 "insert_text",
 791                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 792                                 (gpointer)this);
 793         }
 794         else // no checking
 795         {
 796             gtk_signal_disconnect_by_func
 797             (
 798                 GTK_OBJECT(m_text),
 799                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 800                 (gpointer)this
 801             );
 802         }
 803     }
 804 }
 805
 806 void wxTextCtrl::SetSelection( long from, long to )
 807 {
 808     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 809
 810     if (from == -1 && to == -1)
 811     {
 812         from = 0;
 813         to = GetValue().length();
 814     }
 815
 816     if ( (m_windowStyle & wxTE_MULTILINE) &&
 817          !GTK_TEXT(m_text)->line_start_cache )
 818     {
 819         // tell the programmer that it didn't work
 820         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 821         return;
 822     }
 823
 824     if (m_windowStyle & wxTE_MULTILINE)
 825     {
 826         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 827     }
 828     else
 829     {
 830         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 831     }
 832 }
 833
 834 void wxTextCtrl::ShowPosition( long pos )
 835 {
 836     if (m_windowStyle & wxTE_MULTILINE)
 837     {
 838         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 839         float totalLines =  (float) GetNumberOfLines();
 840         long posX;
 841         long posY;
 842         PositionToXY(pos, &posX, &posY);
 843         float posLine = (float) posY;
 844         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 845         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 846     }
 847 }
 848
 849 long wxTextCtrl::GetInsertionPoint() const
 850 {
 851     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 852     return (long) GET_EDITABLE_POS(m_text);
 853 }
 854
 855 wxTextPos wxTextCtrl::GetLastPosition() const
 856 {
 857     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 858
 859     int pos = 0;
 860
 861     if (m_windowStyle & wxTE_MULTILINE)
 862     {
 863         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 864     }
 865     else
 866     {
 867         pos = GTK_ENTRY(m_text)->text_length;
 868     }
 869
 870     return (long)pos;
 871 }
 872
 873 void wxTextCtrl::Remove( long from, long to )
 874 {
 875     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 876     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 877 }
 878
 879 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 880 {
 881     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 882
 883     Remove( from, to );
 884
 885     if (!value.empty())
 886     {
 887         gint pos = (gint)from;
 888 #if wxUSE_UNICODE
 889         wxWX2MBbuf buf = value.mbc_str();
 890         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 891 #else
 892         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 893 #endif // wxUSE_UNICODE
 894     }
 895 }
 896
 897 void wxTextCtrl::Cut()
 898 {
 899     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 900     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 901 }
 902
 903 void wxTextCtrl::Copy()
 904 {
 905     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 906     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 907 }
 908
 909 void wxTextCtrl::Paste()
 910 {
 911     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 912     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 913 }
 914
 915 // Undo/redo
 916 void wxTextCtrl::Undo()
 917 {
 918     // TODO
 919     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 920 }
 921
 922 void wxTextCtrl::Redo()
 923 {
 924     // TODO
 925     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 926 }
 927
 928 bool wxTextCtrl::CanUndo() const
 929 {
 930     // TODO
 931     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 932     return false;
 933 }
 934
 935 bool wxTextCtrl::CanRedo() const
 936 {
 937     // TODO
 938     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 939     return false;
 940 }
 941
 942 // If the return values from and to are the same, there is no
 943 // selection.
 944 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 945 {
 946     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 947
 948     gint from = -1;
 949     gint to = -1;
 950     bool haveSelection = false;
 951
 952      if ( (GTK_EDITABLE(m_text)->has_selection) )
 953      {
 954          haveSelection = true;
 955          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 956          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 957      }
 958
 959      if (! haveSelection )
 960           from = to = GetInsertionPoint();
 961
 962      if ( from > to )
 963      {
 964          // exchange them to be compatible with wxMSW
 965          gint tmp = from;
 966          from = to;
 967          to = tmp;
 968      }
 969
 970     if ( fromOut )
 971         *fromOut = from;
 972     if ( toOut )
 973         *toOut = to;
 974 }
 975
 976
 977 bool wxTextCtrl::IsEditable() const
 978 {
 979     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 980     return GTK_EDITABLE(m_text)->editable;
 981 }
 982
 983 bool wxTextCtrl::IsModified() const
 984 {
 985     return m_modified;
 986 }
 987
 988 void wxTextCtrl::Clear()
 989 {
 990     SetValue( wxEmptyString );
 991 }
 992
 993 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 994 {
 995     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 996
 997     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 998     {
 999         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1000         event.SetEventObject(this);
1001         event.SetString(GetValue());
1002         if (HandleWindowEvent(event)) return;
1003     }
1004
1005     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1006     {
1007         // This will invoke the dialog default action, such
1008         // as the clicking the default button.
1009
1010         wxWindow *top_frame = m_parent;
1011         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1012             top_frame = top_frame->GetParent();
1013
1014         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1015         {
1016             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1017
1018             if (window->default_widget)
1019             {
1020                 gtk_widget_activate (window->default_widget);
1021                 return;
1022             }
1023         }
1024     }
1025
1026     key_event.Skip();
1027 }
1028
1029 GtkWidget* wxTextCtrl::GetConnectWidget()
1030 {
1031     return GTK_WIDGET(m_text);
1032 }
1033
1034 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1035 {
1036     if (m_windowStyle & wxTE_MULTILINE)
1037     {
1038         return (window == GTK_TEXT(m_text)->text_area);
1039     }
1040     else
1041     {
1042         return (window == GTK_ENTRY(m_text)->text_area);
1043     }
1044 }
1045
1046 // the font will change for subsequent text insertiongs
1047 bool wxTextCtrl::SetFont( const wxFont &font )
1048 {
1049     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1050
1051     if ( !wxTextCtrlBase::SetFont(font) )
1052     {
1053         // font didn't change, nothing to do
1054         return false;
1055     }
1056
1057     if ( m_windowStyle & wxTE_MULTILINE )
1058     {
1059         SetUpdateFont(true);
1060
1061         m_defaultStyle.SetFont(font);
1062
1063         ChangeFontGlobally();
1064     }
1065
1066     return true;
1067 }
1068
1069 void wxTextCtrl::ChangeFontGlobally()
1070 {
1071     // this method is very inefficient and hence should be called as rarely as
1072     // possible!
1073     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1074
1075                   _T("shouldn't be called for single line controls") );
1076
1077     wxString value = GetValue();
1078     if ( !value.empty() )
1079     {
1080         SetUpdateFont(false);
1081
1082         Clear();
1083         AppendText(value);
1084     }
1085 }
1086
1087 void wxTextCtrl::UpdateFontIfNeeded()
1088 {
1089     if ( m_updateFont )
1090         ChangeFontGlobally();
1091 }
1092
1093 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1094 {
1095     if ( !wxControl::SetForegroundColour(colour) )
1096         return false;
1097
1098     // update default fg colour too
1099     m_defaultStyle.SetTextColour(colour);
1100
1101     return true;
1102 }
1103
1104 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1105 {
1106     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1107
1108     if ( !wxControl::SetBackgroundColour( colour ) )
1109         return false;
1110
1111     if (!m_widget->window)
1112         return false;
1113
1114     if (!m_backgroundColour.Ok())
1115         return false;
1116
1117     if (m_windowStyle & wxTE_MULTILINE)
1118     {
1119         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1120         if (!window)
1121             return false;
1122         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1123         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1124         gdk_window_clear( window );
1125     }
1126
1127     // change active background color too
1128     m_defaultStyle.SetBackgroundColour( colour );
1129
1130     return true;
1131 }
1132
1133 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1134 {
1135     if ( m_windowStyle & wxTE_MULTILINE )
1136     {
1137         if ( style.IsDefault() )
1138         {
1139             // nothing to do
1140             return true;
1141         }
1142
1143         // VERY dirty way to do that - removes the required text and re-adds it
1144         // with styling (FIXME)
1145
1146         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1147
1148         wxCHECK_MSG( start >= 0 && end <= l, false,
1149                      _T("invalid range in wxTextCtrl::SetStyle") );
1150
1151         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1152         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1153         wxString tmp(text,*wxConvCurrent);
1154         g_free( text );
1155
1156         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1157         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1158
1159     #if wxUSE_UNICODE
1160         wxWX2MBbuf buf = tmp.mbc_str();
1161         const char *txt = buf;
1162         size_t txtlen = strlen(buf);
1163     #else
1164         const char *txt = tmp;
1165         size_t txtlen = tmp.length();
1166     #endif
1167
1168         // use the attributes from style which are set in it and fall back
1169         // first to the default style and then to the text control default
1170         // colours for the others
1171         wxGtkTextInsert(m_text,
1172                         wxTextAttr::Combine(style, m_defaultStyle, this),
1173                         txt,
1174                         txtlen);
1175
1176         /* does not seem to help under GTK+ 1.2 !!!
1177         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1178         SetInsertionPoint( old_pos );
1179
1180         return true;
1181     }
1182
1183     // else single line
1184     // cannot do this for GTK+'s Entry widget
1185     return false;
1186 }
1187
1188 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1189 {
1190     gtk_widget_modify_style(m_text, style);
1191 }
1192
1193 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1194 {
1195     Cut();
1196 }
1197
1198 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1199 {
1200     Copy();
1201 }
1202
1203 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1204 {
1205     Paste();
1206 }
1207
1208 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1209 {
1210     Undo();
1211 }
1212
1213 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1214 {
1215     Redo();
1216 }
1217
1218 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1219 {
1220     event.Enable( CanCut() );
1221 }
1222
1223 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1224 {
1225     event.Enable( CanCopy() );
1226 }
1227
1228 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1229 {
1230     event.Enable( CanPaste() );
1231 }
1232
1233 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1234 {
1235     event.Enable( CanUndo() );
1236 }
1237
1238 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1239 {
1240     event.Enable( CanRedo() );
1241 }
1242
1243 void wxTextCtrl::OnInternalIdle()
1244 {
1245     wxCursor cursor = m_cursor;
1246     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1247
1248     if (cursor.Ok())
1249     {
1250         GdkWindow *window = (GdkWindow*) NULL;
1251         if (HasFlag(wxTE_MULTILINE))
1252             window = GTK_TEXT(m_text)->text_area;
1253         else
1254             window = GTK_ENTRY(m_text)->text_area;
1255
1256         if (window)
1257             gdk_window_set_cursor( window, cursor.GetCursor() );
1258
1259         if (!g_globalCursor.Ok())
1260             cursor = *wxSTANDARD_CURSOR;
1261
1262         window = m_widget->window;
1263         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1264             gdk_window_set_cursor( window, cursor.GetCursor() );
1265     }
1266
1267     if (g_delayedFocus == this)
1268     {
1269         if (GTK_WIDGET_REALIZED(m_widget))
1270         {
1271             gtk_widget_grab_focus( m_widget );
1272             g_delayedFocus = NULL;
1273         }
1274     }
1275
1276     if (wxUpdateUIEvent::CanUpdate(this))
1277         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1278 }
1279
1280 wxSize wxTextCtrl::DoGetBestSize() const
1281 {
1282     // FIXME should be different for multi-line controls...
1283     wxSize ret( wxControl::DoGetBestSize() );
1284     wxSize best(80, ret.y);
1285     CacheBestSize(best);
1286     return best;
1287 }
1288
1289 // ----------------------------------------------------------------------------
1290 // freeze/thaw
1291 // ----------------------------------------------------------------------------
1292
1293 void wxTextCtrl::Freeze()
1294 {
1295     if ( HasFlag(wxTE_MULTILINE) )
1296     {
1297         gtk_text_freeze(GTK_TEXT(m_text));
1298     }
1299 }
1300
1301 void wxTextCtrl::Thaw()
1302 {
1303     if ( HasFlag(wxTE_MULTILINE) )
1304     {
1305         GTK_TEXT(m_text)->vadj->value = 0.0;
1306
1307         gtk_text_thaw(GTK_TEXT(m_text));
1308     }
1309 }
1310
1311 // ----------------------------------------------------------------------------
1312 // scrolling
1313 // ----------------------------------------------------------------------------
1314
1315 GtkAdjustment *wxTextCtrl::GetVAdj() const
1316 {
1317     if ( !IsMultiLine() )
1318         return NULL;
1319
1320     return GTK_TEXT(m_text)->vadj;
1321 }
1322
1323 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1324 {
1325     float value = adj->value + diff;
1326
1327     if ( value < 0 )
1328         value = 0;
1329
1330     float upper = adj->upper - adj->page_size;
1331     if ( value > upper )
1332         value = upper;
1333
1334     // did we noticeably change the scroll position?
1335     if ( fabs(adj->value - value) < 0.2 )
1336     {
1337         // well, this is what Robert does in wxScrollBar, so it must be good...
1338         return false;
1339     }
1340
1341     adj->value = value;
1342     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1343
1344     return true;
1345 }
1346
1347 bool wxTextCtrl::ScrollLines(int lines)
1348 {
1349     GtkAdjustment *adj = GetVAdj();
1350     if ( !adj )
1351         return false;
1352
1353     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1354     int diff = 10*lines;
1355
1356     return DoScroll(adj, diff);
1357 }
1358
1359 bool wxTextCtrl::ScrollPages(int pages)
1360 {
1361     GtkAdjustment *adj = GetVAdj();
1362     if ( !adj )
1363         return false;
1364
1365     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1366 }
1367
1368
1369 // static
1370 wxVisualAttributes
1371 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1372 {
1373     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1374 }