src/gtk1/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/textctrl.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/intl.h"
  17     #include "wx/log.h"
  18     #include "wx/utils.h"
  19     #include "wx/panel.h"
  20     #include "wx/settings.h"
  21     #include "wx/math.h"
  22 #endif
  23
  24 #include "wx/strconv.h"
  25 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/gtk1/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern wxCursor   g_globalCursor;
  46 extern wxWindowGTK *g_delayedFocus;
  47
  48 // ----------------------------------------------------------------------------
  49 // helpers
  50 // ----------------------------------------------------------------------------
  51
  52 extern "C" {
  53 static void wxGtkTextInsert(GtkWidget *text,
  54                             const wxTextAttr& attr,
  55                             const char *txt,
  56                             size_t len)
  57 {
  58     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  59                                    : NULL;
  60
  61     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  62                                            : NULL;
  63
  64     GdkColor *colBg = attr.HasBackgroundColour()
  65                         ? attr.GetBackgroundColour().GetColor()
  66                         : NULL;
  67
  68     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  69 }
  70 }
  71
  72 // ----------------------------------------------------------------------------
  73 // "insert_text" for GtkEntry
  74 // ----------------------------------------------------------------------------
  75
  76 extern "C" {
  77 static void
  78 gtk_insert_text_callback(GtkEditable *editable,
  79                          const gchar *new_text,
  80                          gint new_text_length,
  81                          gint *position,
  82                          wxTextCtrl *win)
  83 {
  84     if (g_isIdle)
  85         wxapp_install_idle_handler();
  86
  87     // we should only be called if we have a max len limit at all
  88     GtkEntry *entry = GTK_ENTRY (editable);
  89
  90     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  91
  92     // check that we don't overflow the max length limit
  93     //
  94     // FIXME: this doesn't work when we paste a string which is going to be
  95     //        truncated
  96     if ( entry->text_length == entry->text_max_length )
  97     {
  98         // we don't need to run the base class version at all
  99         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 100
 101         // remember that the next changed signal is to be ignored to avoid
 102         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 103         win->IgnoreNextTextUpdate();
 104
 105         // and generate the correct one ourselves
 106         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 107         event.SetEventObject(win);
 108         event.SetString(win->GetValue());
 109         win->GetEventHandler()->ProcessEvent( event );
 110     }
 111 }
 112 }
 113
 114 //-----------------------------------------------------------------------------
 115 //  "changed"
 116 //-----------------------------------------------------------------------------
 117
 118 extern "C" {
 119 static void
 120 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 121 {
 122     if ( win->IgnoreTextUpdate() )
 123         return;
 124
 125     if (!win->m_hasVMT) return;
 126
 127     if (g_isIdle)
 128         wxapp_install_idle_handler();
 129
 130     win->SetModified();
 131     win->UpdateFontIfNeeded();
 132
 133     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 134     event.SetEventObject( win );
 135     win->GetEventHandler()->ProcessEvent( event );
 136 }
 137 }
 138
 139 //-----------------------------------------------------------------------------
 140 // "changed" from vertical scrollbar
 141 //-----------------------------------------------------------------------------
 142
 143 extern "C" {
 144 static void
 145 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 146 {
 147     if (!win->m_hasVMT) return;
 148
 149     if (g_isIdle)
 150         wxapp_install_idle_handler();
 151
 152     win->CalculateScrollbar();
 153 }
 154 }
 155
 156 // ----------------------------------------------------------------------------
 157 // redraw callback for multiline text
 158 // ----------------------------------------------------------------------------
 159
 160 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 161 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 162 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 163 // don't do anything if we're inside wxYield()
 164
 165 extern bool wxIsInsideYield;
 166
 167 extern "C" {
 168     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 169 }
 170
 171 static GtkDrawCallback gs_gtk_text_draw = NULL;
 172
 173 extern "C" {
 174 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 175 {
 176     if ( !wxIsInsideYield )
 177     {
 178         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 179                      _T("infinite recursion in wxgtk_text_draw aborted") );
 180
 181         gs_gtk_text_draw(widget, rect);
 182     }
 183 }
 184 }
 185
 186 //-----------------------------------------------------------------------------
 187 //  wxTextCtrl
 188 //-----------------------------------------------------------------------------
 189
 190 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 191
 192 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 193     EVT_CHAR(wxTextCtrl::OnChar)
 194
 195     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 196     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 197     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 198     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 199     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 200
 201     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 202     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 203     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 204     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 205     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 206 END_EVENT_TABLE()
 207
 208 void wxTextCtrl::Init()
 209 {
 210     m_ignoreNextUpdate =
 211     m_modified = false;
 212     SetUpdateFont(false);
 213     m_text =
 214     m_vScrollbar = (GtkWidget *)NULL;
 215 }
 216
 217 wxTextCtrl::~wxTextCtrl()
 218 {
 219 }
 220
 221 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 222                         wxWindowID id,
 223                         const wxString &value,
 224                         const wxPoint &pos,
 225                         const wxSize &size,
 226                         long style,
 227                         const wxValidator& validator,
 228                         const wxString &name )
 229 {
 230     Init();
 231
 232     Create( parent, id, value, pos, size, style, validator, name );
 233 }
 234
 235 bool wxTextCtrl::Create( wxWindow *parent,
 236                          wxWindowID id,
 237                          const wxString &value,
 238                          const wxPoint &pos,
 239                          const wxSize &size,
 240                          long style,
 241                          const wxValidator& validator,
 242                          const wxString &name )
 243 {
 244     m_needParent = true;
 245     m_acceptsFocus = true;
 246
 247     if (!PreCreation( parent, pos, size ) ||
 248         !CreateBase( parent, id, pos, size, style, validator, name ))
 249     {
 250         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 251         return false;
 252     }
 253
 254
 255     m_vScrollbarVisible = false;
 256
 257     bool multi_line = (style & wxTE_MULTILINE) != 0;
 258
 259     if (multi_line)
 260     {
 261         // create our control ...
 262         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 263
 264         // ... and put into the upper left hand corner of the table
 265         bool bHasHScrollbar = false;
 266         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 267         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 268         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 269                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 270                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 271                        0, 0);
 272
 273         // always wrap words
 274         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 275
 276         // finally, put the vertical scrollbar in the upper right corner
 277         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 278         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 279         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 280                      GTK_FILL,
 281                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 282                      0, 0);
 283     }
 284     else
 285     {
 286         // a single-line text control: no need for scrollbars
 287         m_widget =
 288         m_text = gtk_entry_new();
 289     }
 290
 291     m_parent->DoAddChild( this );
 292
 293     m_focusWidget = m_text;
 294
 295     PostCreation(size);
 296
 297     if (multi_line)
 298         gtk_widget_show(m_text);
 299
 300     if (multi_line)
 301     {
 302         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 303           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 304
 305         // only initialize gs_gtk_text_draw once, starting from the next the
 306         // klass::draw will already be wxgtk_text_draw
 307         if ( !gs_gtk_text_draw )
 308         {
 309             GtkDrawCallback&
 310                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 311
 312             gs_gtk_text_draw = draw;
 313
 314             draw = wxgtk_text_draw;
 315         }
 316     }
 317
 318     if (!value.empty())
 319     {
 320 #if !GTK_CHECK_VERSION(1, 2, 0)
 321         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 322         // gtk_editable_insert_text()
 323         gtk_widget_realize(m_text);
 324 #endif // GTK 1.0
 325
 326         gint tmp = 0;
 327 #if wxUSE_UNICODE
 328         wxWX2MBbuf val = value.mbc_str();
 329         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 330 #else
 331         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 332 #endif
 333
 334         if (multi_line)
 335         {
 336             // Bring editable's cursor uptodate. Bug in GTK.
 337             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 338         }
 339     }
 340
 341     if (style & wxTE_PASSWORD)
 342     {
 343         if (!multi_line)
 344             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 345     }
 346
 347     if (style & wxTE_READONLY)
 348     {
 349         if (!multi_line)
 350             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 351     }
 352     else
 353     {
 354         if (multi_line)
 355             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 356     }
 357
 358     // We want to be notified about text changes.
 359     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 360         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 361
 362     m_cursor = wxCursor( wxCURSOR_IBEAM );
 363
 364     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 365     SetDefaultStyle( attrDef );
 366
 367     return true;
 368 }
 369
 370
 371 void wxTextCtrl::CalculateScrollbar()
 372 {
 373     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 374
 375     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 376
 377     if (adj->upper - adj->page_size < 0.8)
 378     {
 379         if (m_vScrollbarVisible)
 380         {
 381             gtk_widget_hide( m_vScrollbar );
 382             m_vScrollbarVisible = false;
 383         }
 384     }
 385     else
 386     {
 387         if (!m_vScrollbarVisible)
 388         {
 389             gtk_widget_show( m_vScrollbar );
 390             m_vScrollbarVisible = true;
 391         }
 392     }
 393 }
 394
 395 wxString wxTextCtrl::GetValue() const
 396 {
 397     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 398
 399     wxString tmp;
 400     if (m_windowStyle & wxTE_MULTILINE)
 401     {
 402         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 403         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 404         tmp = text;
 405         g_free( text );
 406     }
 407     else
 408     {
 409         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 410     }
 411
 412     return tmp;
 413 }
 414
 415 void wxTextCtrl::SetValue( const wxString &value )
 416 {
 417     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 418
 419     if (m_windowStyle & wxTE_MULTILINE)
 420     {
 421         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 422         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 423         len = 0;
 424         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 425     }
 426     else
 427     {
 428         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 429     }
 430
 431     // GRG, Jun/2000: Changed this after a lot of discussion in
 432     //   the lists. wxWidgets 2.2 will have a set of flags to
 433     //   customize this behaviour.
 434     SetInsertionPoint(0);
 435
 436     m_modified = false;
 437 }
 438
 439 void wxTextCtrl::WriteText( const wxString &text )
 440 {
 441     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 442
 443     if ( text.empty() )
 444         return;
 445
 446     // gtk_text_changed_callback() will set m_modified to true but m_modified
 447     // shouldn't be changed by the program writing to the text control itself,
 448     // so save the old value and restore when we're done
 449     bool oldModified = m_modified;
 450
 451     if ( m_windowStyle & wxTE_MULTILINE )
 452     {
 453         // After cursor movements, gtk_text_get_point() is wrong by one.
 454         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 455
 456         // always use m_defaultStyle, even if it is empty as otherwise
 457         // resetting the style and appending some more text wouldn't work: if
 458         // we don't specify the style explicitly, the old style would be used
 459         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 460         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 461
 462         // we called wxGtkTextInsert with correct font, no need to do anything
 463         // in UpdateFontIfNeeded() any longer
 464         if ( !text.empty() )
 465         {
 466             SetUpdateFont(false);
 467         }
 468
 469         // Bring editable's cursor back uptodate.
 470         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 471     }
 472     else // single line
 473     {
 474         // First remove the selection if there is one
 475         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 476
 477         // This moves the cursor pos to behind the inserted text.
 478         gint len = GET_EDITABLE_POS(m_text);
 479
 480         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 481
 482         // Bring entry's cursor uptodate.
 483         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 484     }
 485
 486     m_modified = oldModified;
 487 }
 488
 489 void wxTextCtrl::AppendText( const wxString &text )
 490 {
 491     SetInsertionPointEnd();
 492     WriteText( text );
 493 }
 494
 495 wxString wxTextCtrl::GetLineText( long lineNo ) const
 496 {
 497     if (m_windowStyle & wxTE_MULTILINE)
 498     {
 499         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 500         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 501
 502         if (text)
 503         {
 504             wxString buf;
 505             long i;
 506             int currentLine = 0;
 507             for (i = 0; currentLine != lineNo && text[i]; i++ )
 508                 if (text[i] == '\n')
 509             currentLine++;
 510             // Now get the text
 511             int j;
 512             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 513                 buf += text[i];
 514
 515             g_free( text );
 516             return buf;
 517         }
 518         else
 519         {
 520             return wxEmptyString;
 521         }
 522     }
 523     else
 524     {
 525         if (lineNo == 0) return GetValue();
 526         return wxEmptyString;
 527     }
 528 }
 529
 530 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 531 {
 532   /* If you implement this, don't forget to update the documentation!
 533    * (file docs/latex/wx/text.tex) */
 534     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 535 }
 536
 537 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 538 {
 539     if ( m_windowStyle & wxTE_MULTILINE )
 540     {
 541         wxString text = GetValue();
 542
 543         // cast to prevent warning. But pos really should've been unsigned.
 544         if( (unsigned long)pos > text.length()  )
 545             return false;
 546
 547         *x=0;   // First Col
 548         *y=0;   // First Line
 549
 550         const wxChar* stop = text.c_str() + pos;
 551         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 552         {
 553             if (*p == wxT('\n'))
 554             {
 555                 (*y)++;
 556                 *x=0;
 557             }
 558             else
 559                 (*x)++;
 560         }
 561     }
 562     else // single line control
 563     {
 564         if ( pos <= GTK_ENTRY(m_text)->text_length )
 565         {
 566             *y = 0;
 567             *x = pos;
 568         }
 569         else
 570         {
 571             // index out of bounds
 572             return false;
 573         }
 574     }
 575
 576     return true;
 577 }
 578
 579 long wxTextCtrl::XYToPosition(long x, long y ) const
 580 {
 581     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 582
 583     long pos=0;
 584     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 585
 586     pos += x;
 587     return pos;
 588 }
 589
 590 int wxTextCtrl::GetLineLength(long lineNo) const
 591 {
 592     wxString str = GetLineText (lineNo);
 593     return (int) str.length();
 594 }
 595
 596 int wxTextCtrl::GetNumberOfLines() const
 597 {
 598     if (m_windowStyle & wxTE_MULTILINE)
 599     {
 600         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 601         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 602
 603         if (text)
 604         {
 605             int currentLine = 0;
 606             for (int i = 0; i < len; i++ )
 607             {
 608                 if (text[i] == '\n')
 609                     currentLine++;
 610             }
 611             g_free( text );
 612
 613             // currentLine is 0 based, add 1 to get number of lines
 614             return currentLine + 1;
 615         }
 616         else
 617         {
 618             return 0;
 619         }
 620     }
 621     else
 622     {
 623         return 1;
 624     }
 625 }
 626
 627 void wxTextCtrl::SetInsertionPoint( long pos )
 628 {
 629     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 630
 631     if ( IsMultiLine() )
 632     {
 633         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 634           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 635
 636         /* we fake a set_point by inserting and deleting. as the user
 637            isn't supposed to get to know about this non-sense, we
 638            disconnect so that no events are sent to the user program. */
 639
 640         gint tmp = (gint)pos;
 641         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 642         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 643
 644         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 645           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 646
 647         // bring editable's cursor uptodate. Bug in GTK.
 648         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 649     }
 650     else
 651     {
 652         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 653
 654         // Bring editable's cursor uptodate. Bug in GTK.
 655         SET_EDITABLE_POS(m_text, (guint32)pos);
 656     }
 657 }
 658
 659 void wxTextCtrl::SetInsertionPointEnd()
 660 {
 661     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 662
 663     if (m_windowStyle & wxTE_MULTILINE)
 664     {
 665         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 666     }
 667     else
 668     {
 669         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 670     }
 671 }
 672
 673 void wxTextCtrl::SetEditable( bool editable )
 674 {
 675     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 676
 677     if (m_windowStyle & wxTE_MULTILINE)
 678     {
 679         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 680     }
 681     else
 682     {
 683         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 684     }
 685 }
 686
 687 bool wxTextCtrl::Enable( bool enable )
 688 {
 689     if (!wxWindowBase::Enable(enable))
 690     {
 691         // nothing to do
 692         return false;
 693     }
 694
 695     if (m_windowStyle & wxTE_MULTILINE)
 696     {
 697         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 698         OnParentEnable(enable);
 699     }
 700     else
 701     {
 702         gtk_widget_set_sensitive( m_text, enable );
 703     }
 704
 705     return true;
 706 }
 707
 708 // wxGTK-specific: called recursively by Enable,
 709 // to give widgets an oppprtunity to correct their colours after they
 710 // have been changed by Enable
 711 void wxTextCtrl::OnParentEnable( bool enable )
 712 {
 713     // If we have a custom background colour, we use this colour in both
 714     // disabled and enabled mode, or we end up with a different colour under the
 715     // text.
 716     wxColour oldColour = GetBackgroundColour();
 717     if (oldColour.Ok())
 718     {
 719         // Need to set twice or it'll optimize the useful stuff out
 720         if (oldColour == * wxWHITE)
 721             SetBackgroundColour(*wxBLACK);
 722         else
 723             SetBackgroundColour(*wxWHITE);
 724         SetBackgroundColour(oldColour);
 725     }
 726 }
 727
 728 void wxTextCtrl::MarkDirty()
 729 {
 730     m_modified = true;
 731 }
 732
 733 void wxTextCtrl::DiscardEdits()
 734 {
 735     m_modified = false;
 736 }
 737
 738 // ----------------------------------------------------------------------------
 739 // max text length support
 740 // ----------------------------------------------------------------------------
 741
 742 void wxTextCtrl::IgnoreNextTextUpdate()
 743 {
 744     m_ignoreNextUpdate = true;
 745 }
 746
 747 bool wxTextCtrl::IgnoreTextUpdate()
 748 {
 749     if ( m_ignoreNextUpdate )
 750     {
 751         m_ignoreNextUpdate = false;
 752
 753         return true;
 754     }
 755
 756     return false;
 757 }
 758
 759 void wxTextCtrl::SetMaxLength(unsigned long len)
 760 {
 761     if ( !HasFlag(wxTE_MULTILINE) )
 762     {
 763         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 764
 765         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 766         // we had tried to enter more text than allowed by max text length and
 767         // the text wasn't really changed
 768         //
 769         // to detect this and generate TEXT_MAXLEN event instead of
 770         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 771         //
 772         // when max len is set to 0 we disconnect our handler as it means that
 773         // we shouldn't check anything any more
 774         if ( len )
 775         {
 776             gtk_signal_connect( GTK_OBJECT(m_text),
 777                                 "insert_text",
 778                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 779                                 (gpointer)this);
 780         }
 781         else // no checking
 782         {
 783             gtk_signal_disconnect_by_func
 784             (
 785                 GTK_OBJECT(m_text),
 786                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 787                 (gpointer)this
 788             );
 789         }
 790     }
 791 }
 792
 793 void wxTextCtrl::SetSelection( long from, long to )
 794 {
 795     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 796
 797     if (from == -1 && to == -1)
 798     {
 799         from = 0;
 800         to = GetValue().length();
 801     }
 802
 803     if ( (m_windowStyle & wxTE_MULTILINE) &&
 804          !GTK_TEXT(m_text)->line_start_cache )
 805     {
 806         // tell the programmer that it didn't work
 807         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 808         return;
 809     }
 810
 811     if (m_windowStyle & wxTE_MULTILINE)
 812     {
 813         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 814     }
 815     else
 816     {
 817         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 818     }
 819 }
 820
 821 void wxTextCtrl::ShowPosition( long pos )
 822 {
 823     if (m_windowStyle & wxTE_MULTILINE)
 824     {
 825         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 826         float totalLines =  (float) GetNumberOfLines();
 827         long posX;
 828         long posY;
 829         PositionToXY(pos, &posX, &posY);
 830         float posLine = (float) posY;
 831         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 832         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 833     }
 834 }
 835
 836 long wxTextCtrl::GetInsertionPoint() const
 837 {
 838     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 839     return (long) GET_EDITABLE_POS(m_text);
 840 }
 841
 842 wxTextPos wxTextCtrl::GetLastPosition() const
 843 {
 844     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 845
 846     int pos = 0;
 847
 848     if (m_windowStyle & wxTE_MULTILINE)
 849     {
 850         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 851     }
 852     else
 853     {
 854         pos = GTK_ENTRY(m_text)->text_length;
 855     }
 856
 857     return (long)pos;
 858 }
 859
 860 void wxTextCtrl::Remove( long from, long to )
 861 {
 862     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 863     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 864 }
 865
 866 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 867 {
 868     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 869
 870     Remove( from, to );
 871
 872     if (!value.empty())
 873     {
 874         gint pos = (gint)from;
 875 #if wxUSE_UNICODE
 876         wxWX2MBbuf buf = value.mbc_str();
 877         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 878 #else
 879         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 880 #endif // wxUSE_UNICODE
 881     }
 882 }
 883
 884 void wxTextCtrl::Cut()
 885 {
 886     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 887     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 888 }
 889
 890 void wxTextCtrl::Copy()
 891 {
 892     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 893     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 894 }
 895
 896 void wxTextCtrl::Paste()
 897 {
 898     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 899     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 900 }
 901
 902 // Undo/redo
 903 void wxTextCtrl::Undo()
 904 {
 905     // TODO
 906     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 907 }
 908
 909 void wxTextCtrl::Redo()
 910 {
 911     // TODO
 912     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 913 }
 914
 915 bool wxTextCtrl::CanUndo() const
 916 {
 917     // TODO
 918     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 919     return false;
 920 }
 921
 922 bool wxTextCtrl::CanRedo() const
 923 {
 924     // TODO
 925     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 926     return false;
 927 }
 928
 929 // If the return values from and to are the same, there is no
 930 // selection.
 931 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 932 {
 933     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 934
 935     gint from = -1;
 936     gint to = -1;
 937     bool haveSelection = false;
 938
 939      if ( (GTK_EDITABLE(m_text)->has_selection) )
 940      {
 941          haveSelection = true;
 942          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 943          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 944      }
 945
 946      if (! haveSelection )
 947           from = to = GetInsertionPoint();
 948
 949      if ( from > to )
 950      {
 951          // exchange them to be compatible with wxMSW
 952          gint tmp = from;
 953          from = to;
 954          to = tmp;
 955      }
 956
 957     if ( fromOut )
 958         *fromOut = from;
 959     if ( toOut )
 960         *toOut = to;
 961 }
 962
 963
 964 bool wxTextCtrl::IsEditable() const
 965 {
 966     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 967     return GTK_EDITABLE(m_text)->editable;
 968 }
 969
 970 bool wxTextCtrl::IsModified() const
 971 {
 972     return m_modified;
 973 }
 974
 975 void wxTextCtrl::Clear()
 976 {
 977     SetValue( wxEmptyString );
 978 }
 979
 980 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 981 {
 982     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 983
 984     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 985     {
 986         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 987         event.SetEventObject(this);
 988         event.SetString(GetValue());
 989         if (GetEventHandler()->ProcessEvent(event)) return;
 990     }
 991
 992     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 993     {
 994         // This will invoke the dialog default action, such
 995         // as the clicking the default button.
 996
 997         wxWindow *top_frame = m_parent;
 998         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 999             top_frame = top_frame->GetParent();
1000
1001         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1002         {
1003             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1004
1005             if (window->default_widget)
1006             {
1007                 gtk_widget_activate (window->default_widget);
1008                 return;
1009             }
1010         }
1011     }
1012
1013     key_event.Skip();
1014 }
1015
1016 GtkWidget* wxTextCtrl::GetConnectWidget()
1017 {
1018     return GTK_WIDGET(m_text);
1019 }
1020
1021 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1022 {
1023     if (m_windowStyle & wxTE_MULTILINE)
1024     {
1025         return (window == GTK_TEXT(m_text)->text_area);
1026     }
1027     else
1028     {
1029         return (window == GTK_ENTRY(m_text)->text_area);
1030     }
1031 }
1032
1033 // the font will change for subsequent text insertiongs
1034 bool wxTextCtrl::SetFont( const wxFont &font )
1035 {
1036     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1037
1038     if ( !wxTextCtrlBase::SetFont(font) )
1039     {
1040         // font didn't change, nothing to do
1041         return false;
1042     }
1043
1044     if ( m_windowStyle & wxTE_MULTILINE )
1045     {
1046         SetUpdateFont(true);
1047
1048         m_defaultStyle.SetFont(font);
1049
1050         ChangeFontGlobally();
1051     }
1052
1053     return true;
1054 }
1055
1056 void wxTextCtrl::ChangeFontGlobally()
1057 {
1058     // this method is very inefficient and hence should be called as rarely as
1059     // possible!
1060     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1061
1062                   _T("shouldn't be called for single line controls") );
1063
1064     wxString value = GetValue();
1065     if ( !value.empty() )
1066     {
1067         SetUpdateFont(false);
1068
1069         Clear();
1070         AppendText(value);
1071     }
1072 }
1073
1074 void wxTextCtrl::UpdateFontIfNeeded()
1075 {
1076     if ( m_updateFont )
1077         ChangeFontGlobally();
1078 }
1079
1080 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1081 {
1082     if ( !wxControl::SetForegroundColour(colour) )
1083         return false;
1084
1085     // update default fg colour too
1086     m_defaultStyle.SetTextColour(colour);
1087
1088     return true;
1089 }
1090
1091 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1092 {
1093     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1094
1095     if ( !wxControl::SetBackgroundColour( colour ) )
1096         return false;
1097
1098     if (!m_widget->window)
1099         return false;
1100
1101     if (!m_backgroundColour.Ok())
1102         return false;
1103
1104     if (m_windowStyle & wxTE_MULTILINE)
1105     {
1106         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1107         if (!window)
1108             return false;
1109         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1110         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1111         gdk_window_clear( window );
1112     }
1113
1114     // change active background color too
1115     m_defaultStyle.SetBackgroundColour( colour );
1116
1117     return true;
1118 }
1119
1120 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1121 {
1122     if ( m_windowStyle & wxTE_MULTILINE )
1123     {
1124         if ( style.IsDefault() )
1125         {
1126             // nothing to do
1127             return true;
1128         }
1129
1130         // VERY dirty way to do that - removes the required text and re-adds it
1131         // with styling (FIXME)
1132
1133         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1134
1135         wxCHECK_MSG( start >= 0 && end <= l, false,
1136                      _T("invalid range in wxTextCtrl::SetStyle") );
1137
1138         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1139         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1140         wxString tmp(text,*wxConvCurrent);
1141         g_free( text );
1142
1143         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1144         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1145
1146     #if wxUSE_UNICODE
1147         wxWX2MBbuf buf = tmp.mbc_str();
1148         const char *txt = buf;
1149         size_t txtlen = strlen(buf);
1150     #else
1151         const char *txt = tmp;
1152         size_t txtlen = tmp.length();
1153     #endif
1154
1155         // use the attributes from style which are set in it and fall back
1156         // first to the default style and then to the text control default
1157         // colours for the others
1158         wxGtkTextInsert(m_text,
1159                         wxTextAttr::Combine(style, m_defaultStyle, this),
1160                         txt,
1161                         txtlen);
1162
1163         /* does not seem to help under GTK+ 1.2 !!!
1164         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1165         SetInsertionPoint( old_pos );
1166
1167         return true;
1168     }
1169
1170     // else single line
1171     // cannot do this for GTK+'s Entry widget
1172     return false;
1173 }
1174
1175 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1176 {
1177     gtk_widget_modify_style(m_text, style);
1178 }
1179
1180 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1181 {
1182     Cut();
1183 }
1184
1185 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1186 {
1187     Copy();
1188 }
1189
1190 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1191 {
1192     Paste();
1193 }
1194
1195 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1196 {
1197     Undo();
1198 }
1199
1200 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1201 {
1202     Redo();
1203 }
1204
1205 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1206 {
1207     event.Enable( CanCut() );
1208 }
1209
1210 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1211 {
1212     event.Enable( CanCopy() );
1213 }
1214
1215 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1216 {
1217     event.Enable( CanPaste() );
1218 }
1219
1220 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1221 {
1222     event.Enable( CanUndo() );
1223 }
1224
1225 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1226 {
1227     event.Enable( CanRedo() );
1228 }
1229
1230 void wxTextCtrl::OnInternalIdle()
1231 {
1232     wxCursor cursor = m_cursor;
1233     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1234
1235     if (cursor.Ok())
1236     {
1237         GdkWindow *window = (GdkWindow*) NULL;
1238         if (HasFlag(wxTE_MULTILINE))
1239             window = GTK_TEXT(m_text)->text_area;
1240         else
1241             window = GTK_ENTRY(m_text)->text_area;
1242
1243         if (window)
1244             gdk_window_set_cursor( window, cursor.GetCursor() );
1245
1246         if (!g_globalCursor.Ok())
1247             cursor = *wxSTANDARD_CURSOR;
1248
1249         window = m_widget->window;
1250         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1251             gdk_window_set_cursor( window, cursor.GetCursor() );
1252     }
1253
1254     if (g_delayedFocus == this)
1255     {
1256         if (GTK_WIDGET_REALIZED(m_widget))
1257         {
1258             gtk_widget_grab_focus( m_widget );
1259             g_delayedFocus = NULL;
1260         }
1261     }
1262
1263     if (wxUpdateUIEvent::CanUpdate(this))
1264         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1265 }
1266
1267 wxSize wxTextCtrl::DoGetBestSize() const
1268 {
1269     // FIXME should be different for multi-line controls...
1270     wxSize ret( wxControl::DoGetBestSize() );
1271     wxSize best(80, ret.y);
1272     CacheBestSize(best);
1273     return best;
1274 }
1275
1276 // ----------------------------------------------------------------------------
1277 // freeze/thaw
1278 // ----------------------------------------------------------------------------
1279
1280 void wxTextCtrl::Freeze()
1281 {
1282     if ( HasFlag(wxTE_MULTILINE) )
1283     {
1284         gtk_text_freeze(GTK_TEXT(m_text));
1285     }
1286 }
1287
1288 void wxTextCtrl::Thaw()
1289 {
1290     if ( HasFlag(wxTE_MULTILINE) )
1291     {
1292         GTK_TEXT(m_text)->vadj->value = 0.0;
1293
1294         gtk_text_thaw(GTK_TEXT(m_text));
1295     }
1296 }
1297
1298 // ----------------------------------------------------------------------------
1299 // scrolling
1300 // ----------------------------------------------------------------------------
1301
1302 GtkAdjustment *wxTextCtrl::GetVAdj() const
1303 {
1304     if ( !IsMultiLine() )
1305         return NULL;
1306
1307     return GTK_TEXT(m_text)->vadj;
1308 }
1309
1310 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1311 {
1312     float value = adj->value + diff;
1313
1314     if ( value < 0 )
1315         value = 0;
1316
1317     float upper = adj->upper - adj->page_size;
1318     if ( value > upper )
1319         value = upper;
1320
1321     // did we noticeably change the scroll position?
1322     if ( fabs(adj->value - value) < 0.2 )
1323     {
1324         // well, this is what Robert does in wxScrollBar, so it must be good...
1325         return false;
1326     }
1327
1328     adj->value = value;
1329     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1330
1331     return true;
1332 }
1333
1334 bool wxTextCtrl::ScrollLines(int lines)
1335 {
1336     GtkAdjustment *adj = GetVAdj();
1337     if ( !adj )
1338         return false;
1339
1340     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1341     int diff = 10*lines;
1342
1343     return DoScroll(adj, diff);
1344 }
1345
1346 bool wxTextCtrl::ScrollPages(int pages)
1347 {
1348     GtkAdjustment *adj = GetVAdj();
1349     if ( !adj )
1350         return false;
1351
1352     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1353 }
1354
1355
1356 // static
1357 wxVisualAttributes
1358 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1359 {
1360     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1361 }