src/gtk/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "textctrl.h"
  12 #endif
  13
  14 #include "wx/textctrl.h"
  15 #include "wx/utils.h"
  16 #include "wx/intl.h"
  17 #include "wx/log.h"
  18 #include "wx/settings.h"
  19 #include "wx/panel.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <ctype.h>
  24 #include <math.h>               // for fabs
  25
  26 // TODO: reimplement wxTextCtrl using GtkTextView
  27 #ifdef __WXGTK20__
  28     #define GTK_ENABLE_BROKEN       // need this to get GtkText at all
  29 #endif // __WXGTK20__
  30
  31 #include "wx/gtk/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 bool       g_blockEventsOnDrag;
  46 extern wxCursor   g_globalCursor;
  47 extern wxWindowGTK *g_delayedFocus;
  48
  49 // ----------------------------------------------------------------------------
  50 // helpers
  51 // ----------------------------------------------------------------------------
  52
  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 // "insert_text" for GtkEntry
  73 // ----------------------------------------------------------------------------
  74
  75 static void
  76 gtk_insert_text_callback(GtkEditable *editable,
  77                          const gchar *new_text,
  78                          gint new_text_length,
  79                          gint *position,
  80                          wxTextCtrl *win)
  81 {
  82     if (g_isIdle)
  83         wxapp_install_idle_handler();
  84
  85     // we should only be called if we have a max len limit at all
  86     GtkEntry *entry = GTK_ENTRY (editable);
  87
  88     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  89
  90     // check that we don't overflow the max length limit
  91     //
  92     // FIXME: this doesn't work when we paste a string which is going to be
  93     //        truncated
  94     if ( entry->text_length == entry->text_max_length )
  95     {
  96         // we don't need to run the base class version at all
  97         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
  98
  99         // remember that the next changed signal is to be ignored to avoid
 100         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 101         win->IgnoreNextTextUpdate();
 102
 103         // and generate the correct one ourselves
 104         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 105         event.SetEventObject(win);
 106         event.SetString(win->GetValue());
 107         win->GetEventHandler()->ProcessEvent( event );
 108     }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 //  "changed"
 113 //-----------------------------------------------------------------------------
 114
 115 static void
 116 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 117 {
 118     if ( win->IgnoreTextUpdate() )
 119         return;
 120
 121     if (!win->m_hasVMT) return;
 122
 123     if (g_isIdle)
 124         wxapp_install_idle_handler();
 125
 126     win->SetModified();
 127     win->UpdateFontIfNeeded();
 128
 129     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 130     event.SetEventObject( win );
 131     event.SetString( win->GetValue() );
 132     win->GetEventHandler()->ProcessEvent( event );
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136 // "changed" from vertical scrollbar
 137 //-----------------------------------------------------------------------------
 138
 139 static void
 140 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 141 {
 142     if (!win->m_hasVMT) return;
 143
 144     if (g_isIdle)
 145         wxapp_install_idle_handler();
 146
 147     win->CalculateScrollbar();
 148 }
 149
 150 //-----------------------------------------------------------------------------
 151 //  wxTextCtrl
 152 //-----------------------------------------------------------------------------
 153
 154 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 155
 156 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 157     EVT_CHAR(wxTextCtrl::OnChar)
 158
 159     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 160     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 161     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 162     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 163     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 164
 165     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 166     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 167     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 168     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 169     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 170 END_EVENT_TABLE()
 171
 172 void wxTextCtrl::Init()
 173 {
 174     m_ignoreNextUpdate =
 175     m_modified = FALSE;
 176     m_updateFont = FALSE;
 177     m_text =
 178     m_vScrollbar = (GtkWidget *)NULL;
 179 }
 180
 181 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 182                         wxWindowID id,
 183                         const wxString &value,
 184                         const wxPoint &pos,
 185                         const wxSize &size,
 186                         long style,
 187                         const wxValidator& validator,
 188                         const wxString &name )
 189 {
 190     Init();
 191
 192     Create( parent, id, value, pos, size, style, validator, name );
 193 }
 194
 195 bool wxTextCtrl::Create( wxWindow *parent,
 196                          wxWindowID id,
 197                          const wxString &value,
 198                          const wxPoint &pos,
 199                          const wxSize &size,
 200                          long style,
 201                          const wxValidator& validator,
 202                          const wxString &name )
 203 {
 204     m_needParent = TRUE;
 205     m_acceptsFocus = TRUE;
 206
 207     if (!PreCreation( parent, pos, size ) ||
 208         !CreateBase( parent, id, pos, size, style, validator, name ))
 209     {
 210         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 211         return FALSE;
 212     }
 213
 214
 215     m_vScrollbarVisible = FALSE;
 216
 217     bool multi_line = (style & wxTE_MULTILINE) != 0;
 218     if (multi_line)
 219     {
 220 #ifdef __WXGTK13__
 221         /* a multi-line edit control: create a vertical scrollbar by default and
 222            horizontal if requested */
 223         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 224 #else
 225         bool bHasHScrollbar = FALSE;
 226 #endif
 227
 228         /* create our control ... */
 229         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 230
 231         /* ... and put into the upper left hand corner of the table */
 232         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 233         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 234         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 235                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 236                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 237                        0, 0);
 238
 239         /* always wrap words */
 240         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 241
 242 #ifdef __WXGTK13__
 243         /* put the horizontal scrollbar in the lower left hand corner */
 244         if (bHasHScrollbar)
 245         {
 246             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 247             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 248             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 249                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 250                        GTK_FILL,
 251                        0, 0);
 252             gtk_widget_show(hscrollbar);
 253
 254             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 255             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 256         }
 257 #endif
 258
 259         /* finally, put the vertical scrollbar in the upper right corner */
 260         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 261         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 262         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 263                      GTK_FILL,
 264                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 265                      0, 0);
 266     }
 267     else
 268     {
 269         /* a single-line text control: no need for scrollbars */
 270         m_widget =
 271           m_text = gtk_entry_new();
 272     }
 273
 274     m_parent->DoAddChild( this );
 275
 276     m_focusWidget = m_text;
 277
 278     PostCreation();
 279
 280     SetFont( parent->GetFont() );
 281
 282     wxSize size_best( DoGetBestSize() );
 283     wxSize new_size( size );
 284     if (new_size.x == -1)
 285         new_size.x = size_best.x;
 286     if (new_size.y == -1)
 287         new_size.y = size_best.y;
 288     if ((new_size.x != size.x) || (new_size.y != size.y))
 289         SetSize( new_size.x, new_size.y );
 290
 291     if (multi_line)
 292         gtk_widget_show(m_text);
 293
 294     if (multi_line)
 295     {
 296         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 297           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 298     }
 299
 300     if (!value.IsEmpty())
 301     {
 302         gint tmp = 0;
 303
 304 #if !GTK_CHECK_VERSION(1, 2, 0)
 305         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 306         // gtk_editable_insert_text()
 307         gtk_widget_realize(m_text);
 308 #endif // GTK 1.0
 309
 310 #if wxUSE_UNICODE
 311         wxWX2MBbuf val = value.mbc_str();
 312         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 313 #else // !Unicode
 314         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 315 #endif // Unicode/!Unicode
 316
 317         if (multi_line)
 318         {
 319             /* bring editable's cursor uptodate. bug in GTK. */
 320             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 321         }
 322     }
 323
 324     if (style & wxTE_PASSWORD)
 325     {
 326         if (!multi_line)
 327             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 328     }
 329
 330     if (style & wxTE_READONLY)
 331     {
 332         if (!multi_line)
 333             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 334     }
 335     else
 336     {
 337         if (multi_line)
 338             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 339     }
 340
 341     /* we want to be notified about text changes */
 342     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 343       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 344
 345     /* we don't set a valid background colour, because the window
 346        manager should use a default one */
 347     m_backgroundColour = wxColour();
 348
 349     wxColour colFg = parent->GetForegroundColour();
 350     SetForegroundColour( colFg );
 351
 352     m_cursor = wxCursor( wxCURSOR_IBEAM );
 353
 354     wxTextAttr attrDef( colFg, m_backgroundColour, parent->GetFont() );
 355     SetDefaultStyle( attrDef );
 356
 357     Show( TRUE );
 358
 359     return TRUE;
 360 }
 361
 362 void wxTextCtrl::CalculateScrollbar()
 363 {
 364     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 365
 366     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 367
 368     if (adj->upper - adj->page_size < 0.8)
 369     {
 370         if (m_vScrollbarVisible)
 371         {
 372             gtk_widget_hide( m_vScrollbar );
 373             m_vScrollbarVisible = FALSE;
 374         }
 375     }
 376     else
 377     {
 378         if (!m_vScrollbarVisible)
 379         {
 380             gtk_widget_show( m_vScrollbar );
 381             m_vScrollbarVisible = TRUE;
 382         }
 383     }
 384 }
 385
 386 wxString wxTextCtrl::GetValue() const
 387 {
 388     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 389
 390     wxString tmp;
 391     if (m_windowStyle & wxTE_MULTILINE)
 392     {
 393         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 394         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 395         tmp = wxString(text,*wxConvCurrent);
 396         g_free( text );
 397     }
 398     else
 399     {
 400         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 401     }
 402     return tmp;
 403 }
 404
 405 void wxTextCtrl::SetValue( const wxString &value )
 406 {
 407     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 408
 409     if (m_windowStyle & wxTE_MULTILINE)
 410     {
 411         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 412         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 413         len = 0;
 414 #if wxUSE_UNICODE
 415         wxWX2MBbuf tmpbuf = value.mbc_str();
 416         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 417 #else
 418         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 419 #endif
 420     }
 421     else
 422     {
 423         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 424     }
 425
 426     // GRG, Jun/2000: Changed this after a lot of discussion in
 427     //   the lists. wxWindows 2.2 will have a set of flags to
 428     //   customize this behaviour.
 429     SetInsertionPoint(0);
 430
 431     m_modified = FALSE;
 432 }
 433
 434 void wxTextCtrl::WriteText( const wxString &text )
 435 {
 436     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 437
 438     if ( text.empty() )
 439         return;
 440
 441 #if wxUSE_UNICODE
 442     wxWX2MBbuf buf = text.mbc_str();
 443     const char *txt = buf;
 444     size_t txtlen = strlen(buf);
 445 #else
 446     const char *txt = text;
 447     size_t txtlen = text.length();
 448 #endif
 449
 450     if ( m_windowStyle & wxTE_MULTILINE )
 451     {
 452         // After cursor movements, gtk_text_get_point() is wrong by one.
 453         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 454
 455         // always use m_defaultStyle, even if it is empty as otherwise
 456         // resetting the style and appending some more text wouldn't work: if
 457         // we don't specify the style explicitly, the old style would be used
 458         wxGtkTextInsert(m_text, m_defaultStyle, txt, txtlen);
 459
 460         // Bring editable's cursor back uptodate.
 461         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 462     }
 463     else // single line
 464     {
 465         // This moves the cursor pos to behind the inserted text.
 466         gint len = GET_EDITABLE_POS(m_text);
 467         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 468
 469         // Bring editable's cursor uptodate.
 470         len += text.Len();
 471
 472         // Bring entry's cursor uptodate.
 473         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 474     }
 475
 476     m_modified = TRUE;
 477 }
 478
 479 void wxTextCtrl::AppendText( const wxString &text )
 480 {
 481     SetInsertionPointEnd();
 482     WriteText( text );
 483 }
 484
 485 wxString wxTextCtrl::GetLineText( long lineNo ) const
 486 {
 487     if (m_windowStyle & wxTE_MULTILINE)
 488     {
 489         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 490         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 491
 492         if (text)
 493         {
 494             wxString buf(wxT(""));
 495             long i;
 496             int currentLine = 0;
 497             for (i = 0; currentLine != lineNo && text[i]; i++ )
 498                 if (text[i] == '\n')
 499             currentLine++;
 500             // Now get the text
 501             int j;
 502             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 503                 buf += text[i];
 504
 505             g_free( text );
 506             return buf;
 507         }
 508         else
 509         {
 510             return wxEmptyString;
 511         }
 512     }
 513     else
 514     {
 515         if (lineNo == 0) return GetValue();
 516         return wxEmptyString;
 517     }
 518 }
 519
 520 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 521 {
 522   /* If you implement this, don't forget to update the documentation!
 523    * (file docs/latex/wx/text.tex) */
 524     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 525 }
 526
 527 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 528 {
 529     if ( m_windowStyle & wxTE_MULTILINE )
 530     {
 531         wxString text = GetValue();
 532
 533         // cast to prevent warning. But pos really should've been unsigned.
 534         if( (unsigned long)pos > text.Len()  )
 535             return FALSE;
 536
 537         *x=0;   // First Col
 538         *y=0;   // First Line
 539
 540         const wxChar* stop = text.c_str() + pos;
 541         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 542         {
 543             if (*p == wxT('\n'))
 544             {
 545                 (*y)++;
 546                 *x=0;
 547             }
 548             else
 549                 (*x)++;
 550         }
 551     }
 552     else // single line control
 553     {
 554         if ( pos <= GTK_ENTRY(m_text)->text_length )
 555         {
 556             *y = 0;
 557             *x = pos;
 558         }
 559         else
 560         {
 561             // index out of bounds
 562             return FALSE;
 563         }
 564     }
 565
 566     return TRUE;
 567 }
 568
 569 long wxTextCtrl::XYToPosition(long x, long y ) const
 570 {
 571     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 572
 573     long pos=0;
 574     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 575
 576     pos += x;
 577     return pos;
 578 }
 579
 580 int wxTextCtrl::GetLineLength(long lineNo) const
 581 {
 582     wxString str = GetLineText (lineNo);
 583     return (int) str.Length();
 584 }
 585
 586 int wxTextCtrl::GetNumberOfLines() const
 587 {
 588     if (m_windowStyle & wxTE_MULTILINE)
 589     {
 590         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 591         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 592
 593         if (text)
 594         {
 595             int currentLine = 0;
 596             for (int i = 0; i < len; i++ )
 597             {
 598                 if (text[i] == '\n')
 599                     currentLine++;
 600             }
 601             g_free( text );
 602
 603             // currentLine is 0 based, add 1 to get number of lines
 604             return currentLine + 1;
 605         }
 606         else
 607         {
 608             return 0;
 609         }
 610     }
 611     else
 612     {
 613         return 1;
 614     }
 615 }
 616
 617 void wxTextCtrl::SetInsertionPoint( long pos )
 618 {
 619     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 620
 621     if (m_windowStyle & wxTE_MULTILINE)
 622     {
 623         /* seems to be broken in GTK 1.0.X:
 624            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 625
 626         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 627           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 628
 629         /* we fake a set_point by inserting and deleting. as the user
 630            isn't supposed to get to know about thos non-sense, we
 631            disconnect so that no events are sent to the user program. */
 632
 633         gint tmp = (gint)pos;
 634         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 635         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 636
 637         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 638           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 639
 640         /* bring editable's cursor uptodate. another bug in GTK. */
 641
 642         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 643     }
 644     else
 645     {
 646         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 647
 648         /* bring editable's cursor uptodate. bug in GTK. */
 649
 650         SET_EDITABLE_POS(m_text, (guint32)pos);
 651     }
 652 }
 653
 654 void wxTextCtrl::SetInsertionPointEnd()
 655 {
 656     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 657
 658     if (m_windowStyle & wxTE_MULTILINE)
 659         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 660     else
 661         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 662 }
 663
 664 void wxTextCtrl::SetEditable( bool editable )
 665 {
 666     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 667
 668     if (m_windowStyle & wxTE_MULTILINE)
 669         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 670     else
 671         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 672 }
 673
 674 bool wxTextCtrl::Enable( bool enable )
 675 {
 676     if (!wxWindowBase::Enable(enable))
 677     {
 678         // nothing to do
 679         return FALSE;
 680     }
 681
 682     if (m_windowStyle & wxTE_MULTILINE)
 683     {
 684         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 685         OnParentEnable(enable);
 686     }
 687     else
 688     {
 689         gtk_widget_set_sensitive( m_text, enable );
 690     }
 691
 692     return TRUE;
 693 }
 694
 695 // wxGTK-specific: called recursively by Enable,
 696 // to give widgets an oppprtunity to correct their colours after they
 697 // have been changed by Enable
 698 void wxTextCtrl::OnParentEnable( bool enable )
 699 {
 700     // If we have a custom background colour, we use this colour in both
 701     // disabled and enabled mode, or we end up with a different colour under the
 702     // text.
 703     wxColour oldColour = GetBackgroundColour();
 704     if (oldColour.Ok())
 705     {
 706         // Need to set twice or it'll optimize the useful stuff out
 707         if (oldColour == * wxWHITE)
 708             SetBackgroundColour(*wxBLACK);
 709         else
 710             SetBackgroundColour(*wxWHITE);
 711         SetBackgroundColour(oldColour);
 712     }
 713 }
 714
 715 void wxTextCtrl::DiscardEdits()
 716 {
 717     m_modified = FALSE;
 718 }
 719
 720 // ----------------------------------------------------------------------------
 721 // max text length support
 722 // ----------------------------------------------------------------------------
 723
 724 void wxTextCtrl::IgnoreNextTextUpdate()
 725 {
 726     m_ignoreNextUpdate = TRUE;
 727 }
 728
 729 bool wxTextCtrl::IgnoreTextUpdate()
 730 {
 731     if ( m_ignoreNextUpdate )
 732     {
 733         m_ignoreNextUpdate = FALSE;
 734
 735         return TRUE;
 736     }
 737
 738     return FALSE;
 739 }
 740
 741 void wxTextCtrl::SetMaxLength(unsigned long len)
 742 {
 743     if ( !HasFlag(wxTE_MULTILINE) )
 744     {
 745         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 746
 747         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 748         // we had tried to enter more text than allowed by max text length and
 749         // the text wasn't really changed
 750         //
 751         // to detect this and generate TEXT_MAXLEN event instead of
 752         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 753         //
 754         // when max len is set to 0 we disconnect our handler as it means that
 755         // we shouldn't check anything any more
 756         if ( len )
 757         {
 758             gtk_signal_connect( GTK_OBJECT(m_text),
 759                                 "insert_text",
 760                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 761                                 (gpointer)this);
 762         }
 763         else // no checking
 764         {
 765             gtk_signal_disconnect_by_func
 766             (
 767                 GTK_OBJECT(m_text),
 768                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 769                 (gpointer)this
 770             );
 771         }
 772     }
 773 }
 774
 775 void wxTextCtrl::SetSelection( long from, long to )
 776 {
 777     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 778
 779     if ( (m_windowStyle & wxTE_MULTILINE) &&
 780          !GTK_TEXT(m_text)->line_start_cache )
 781     {
 782         // tell the programmer that it didn't work
 783         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 784         return;
 785     }
 786
 787     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 788 }
 789
 790 void wxTextCtrl::ShowPosition( long pos )
 791 {
 792     if (m_windowStyle & wxTE_MULTILINE)
 793     {
 794         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 795         float totalLines =  (float) GetNumberOfLines();
 796         long posX;
 797         long posY;
 798         PositionToXY(pos, &posX, &posY);
 799         float posLine = (float) posY;
 800         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 801         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 802     }
 803 }
 804
 805 long wxTextCtrl::GetInsertionPoint() const
 806 {
 807     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 808
 809     return (long) GET_EDITABLE_POS(m_text);
 810 }
 811
 812 long wxTextCtrl::GetLastPosition() const
 813 {
 814     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 815
 816     int pos = 0;
 817     if (m_windowStyle & wxTE_MULTILINE)
 818         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 819     else
 820         pos = GTK_ENTRY(m_text)->text_length;
 821
 822     return (long)pos;
 823 }
 824
 825 void wxTextCtrl::Remove( long from, long to )
 826 {
 827     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 828
 829     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 830 }
 831
 832 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 833 {
 834     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 835
 836     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 837
 838     if (!value.IsEmpty())
 839     {
 840         gint pos = (gint)from;
 841 #if wxUSE_UNICODE
 842         wxWX2MBbuf buf = value.mbc_str();
 843         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 844 #else
 845         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 846 #endif
 847     }
 848 }
 849
 850 void wxTextCtrl::Cut()
 851 {
 852     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 853
 854     gtk_editable_cut_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 855 }
 856
 857 void wxTextCtrl::Copy()
 858 {
 859     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 860
 861     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 862 }
 863
 864 void wxTextCtrl::Paste()
 865 {
 866     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 867
 868     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 869 }
 870
 871 // Undo/redo
 872 void wxTextCtrl::Undo()
 873 {
 874     // TODO
 875     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 876 }
 877
 878 void wxTextCtrl::Redo()
 879 {
 880     // TODO
 881     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 882 }
 883
 884 bool wxTextCtrl::CanUndo() const
 885 {
 886     // TODO
 887     wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 888     return FALSE;
 889 }
 890
 891 bool wxTextCtrl::CanRedo() const
 892 {
 893     // TODO
 894     wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 895     return FALSE;
 896 }
 897
 898 // If the return values from and to are the same, there is no
 899 // selection.
 900 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 901 {
 902     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 903
 904     gint from, to;
 905 #ifdef __WXGTK20__
 906     if ( !gtk_editable_get_selection_bounds(GTK_EDITABLE(m_text), &from, &to) )
 907 #else
 908     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 909 #endif
 910     {
 911         from =
 912         to = GetInsertionPoint();
 913     }
 914     else // got selection
 915     {
 916 #ifndef __WXGTK20__
 917         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 918         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 919 #endif
 920
 921         if ( from > to )
 922         {
 923             // exchange them to be compatible with wxMSW
 924             gint tmp = from;
 925             from = to;
 926             to = tmp;
 927         }
 928     }
 929
 930     if ( fromOut )
 931         *fromOut = from;
 932     if ( toOut )
 933         *toOut = to;
 934 }
 935
 936 bool wxTextCtrl::IsEditable() const
 937 {
 938     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 939
 940 #ifdef __WXGTK20__
 941     return gtk_editable_get_editable(GTK_EDITABLE(m_text));
 942 #else
 943     return GTK_EDITABLE(m_text)->editable;
 944 #endif
 945 }
 946
 947 bool wxTextCtrl::IsModified() const
 948 {
 949     return m_modified;
 950 }
 951
 952 void wxTextCtrl::Clear()
 953 {
 954     SetValue( wxT("") );
 955 }
 956
 957 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 958 {
 959     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 960
 961     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
 962     {
 963         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 964         event.SetEventObject(this);
 965         event.SetString(GetValue());
 966         if (GetEventHandler()->ProcessEvent(event)) return;
 967     }
 968
 969     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 970     {
 971         // This will invoke the dialog default action, such
 972         // as the clicking the default button.
 973
 974         wxWindow *top_frame = m_parent;
 975         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 976             top_frame = top_frame->GetParent();
 977
 978         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 979         {
 980             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 981
 982             if (window->default_widget)
 983             {
 984                 gtk_widget_activate (window->default_widget);
 985                 return;
 986             }
 987         }
 988     }
 989
 990     key_event.Skip();
 991 }
 992
 993 GtkWidget* wxTextCtrl::GetConnectWidget()
 994 {
 995     return GTK_WIDGET(m_text);
 996 }
 997
 998 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
 999 {
1000     if (m_windowStyle & wxTE_MULTILINE)
1001         return (window == GTK_TEXT(m_text)->text_area);
1002     else
1003         return (window == GTK_ENTRY(m_text)->text_area);
1004 }
1005
1006 // the font will change for subsequent text insertiongs
1007 bool wxTextCtrl::SetFont( const wxFont &font )
1008 {
1009     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1010
1011     if ( !wxTextCtrlBase::SetFont(font) )
1012     {
1013         // font didn't change, nothing to do
1014         return FALSE;
1015     }
1016
1017     if ( m_windowStyle & wxTE_MULTILINE )
1018     {
1019         m_updateFont = TRUE;
1020
1021         m_defaultStyle.SetFont(font);
1022
1023         ChangeFontGlobally();
1024     }
1025
1026     return TRUE;
1027 }
1028
1029 void wxTextCtrl::ChangeFontGlobally()
1030 {
1031     // this method is very inefficient and hence should be called as rarely as
1032     // possible!
1033     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1034                   _T("shouldn't be called for single line controls") );
1035
1036     wxString value = GetValue();
1037     if ( !value.IsEmpty() )
1038     {
1039         m_updateFont = FALSE;
1040
1041         Clear();
1042         AppendText(value);
1043     }
1044 }
1045
1046 void wxTextCtrl::UpdateFontIfNeeded()
1047 {
1048     if ( m_updateFont )
1049         ChangeFontGlobally();
1050 }
1051
1052 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1053 {
1054     if ( !wxControl::SetForegroundColour(colour) )
1055         return FALSE;
1056
1057     // update default fg colour too
1058     m_defaultStyle.SetTextColour(colour);
1059
1060     return TRUE;
1061 }
1062
1063 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1064 {
1065     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1066
1067     if ( !wxControl::SetBackgroundColour( colour ) )
1068         return FALSE;
1069
1070     if (!m_widget->window)
1071         return FALSE;
1072
1073     wxColour sysbg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
1074     if (sysbg.Red() == colour.Red() &&
1075         sysbg.Green() == colour.Green() &&
1076         sysbg.Blue() == colour.Blue())
1077     {
1078         return FALSE; // FIXME or TRUE?
1079     }
1080
1081     if (!m_backgroundColour.Ok())
1082         return FALSE;
1083
1084     if (m_windowStyle & wxTE_MULTILINE)
1085     {
1086         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1087         if (!window)
1088             return FALSE;
1089         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1090         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1091         gdk_window_clear( window );
1092     }
1093
1094     // change active background color too
1095     m_defaultStyle.SetBackgroundColour( colour );
1096
1097     return TRUE;
1098 }
1099
1100 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1101 {
1102     /* VERY dirty way to do that - removes the required text and re-adds it
1103        with styling (FIXME) */
1104     if ( m_windowStyle & wxTE_MULTILINE )
1105     {
1106         if ( style.IsDefault() )
1107         {
1108             // nothing to do
1109             return TRUE;
1110         }
1111
1112         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1113
1114         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1115                      _T("invalid range in wxTextCtrl::SetStyle") );
1116
1117         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1118         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1119         wxString tmp(text,*wxConvCurrent);
1120         g_free( text );
1121
1122         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1123         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1124
1125 #if wxUSE_UNICODE
1126         wxWX2MBbuf buf = tmp.mbc_str();
1127         const char *txt = buf;
1128         size_t txtlen = strlen(buf);
1129 #else
1130         const char *txt = tmp;
1131         size_t txtlen = tmp.length();
1132 #endif
1133
1134         // use the attributes from style which are set in it and fall back
1135         // first to the default style and then to the text control default
1136         // colours for the others
1137         wxGtkTextInsert(m_text,
1138                         wxTextAttr::Combine(style, m_defaultStyle, this),
1139                         txt,
1140                         txtlen);
1141
1142         /* does not seem to help under GTK+ 1.2 !!!
1143         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1144         SetInsertionPoint( old_pos );
1145         return TRUE;
1146     }
1147     else // singe line
1148     {
1149         // cannot do this for GTK+'s Entry widget
1150         return FALSE;
1151     }
1152 }
1153
1154 void wxTextCtrl::ApplyWidgetStyle()
1155 {
1156     if (m_windowStyle & wxTE_MULTILINE)
1157     {
1158         // how ?
1159     }
1160     else
1161     {
1162         SetWidgetStyle();
1163         gtk_widget_set_style( m_text, m_widgetStyle );
1164     }
1165 }
1166
1167 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1168 {
1169     Cut();
1170 }
1171
1172 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1173 {
1174     Copy();
1175 }
1176
1177 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1178 {
1179     Paste();
1180 }
1181
1182 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1183 {
1184     Undo();
1185 }
1186
1187 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1188 {
1189     Redo();
1190 }
1191
1192 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1193 {
1194     event.Enable( CanCut() );
1195 }
1196
1197 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1198 {
1199     event.Enable( CanCopy() );
1200 }
1201
1202 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1203 {
1204     event.Enable( CanPaste() );
1205 }
1206
1207 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1208 {
1209     event.Enable( CanUndo() );
1210 }
1211
1212 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1213 {
1214     event.Enable( CanRedo() );
1215 }
1216
1217 void wxTextCtrl::OnInternalIdle()
1218 {
1219     wxCursor cursor = m_cursor;
1220     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1221
1222     if (cursor.Ok())
1223     {
1224         GdkWindow *window = (GdkWindow*) NULL;
1225         if (HasFlag(wxTE_MULTILINE))
1226             window = GTK_TEXT(m_text)->text_area;
1227         else
1228             window = GTK_ENTRY(m_text)->text_area;
1229
1230         if (window)
1231             gdk_window_set_cursor( window, cursor.GetCursor() );
1232
1233         if (!g_globalCursor.Ok())
1234             cursor = *wxSTANDARD_CURSOR;
1235
1236         window = m_widget->window;
1237         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1238             gdk_window_set_cursor( window, cursor.GetCursor() );
1239     }
1240
1241     if (g_delayedFocus == this)
1242     {
1243         if (GTK_WIDGET_REALIZED(m_widget))
1244         {
1245             gtk_widget_grab_focus( m_widget );
1246             g_delayedFocus = NULL;
1247         }
1248     }
1249
1250     UpdateWindowUI();
1251 }
1252
1253 wxSize wxTextCtrl::DoGetBestSize() const
1254 {
1255     // FIXME should be different for multi-line controls...
1256     wxSize ret( wxControl::DoGetBestSize() );
1257     return wxSize(80, ret.y);
1258 }
1259
1260 // ----------------------------------------------------------------------------
1261 // freeze/thaw
1262 // ----------------------------------------------------------------------------
1263
1264 void wxTextCtrl::Freeze()
1265 {
1266     if ( HasFlag(wxTE_MULTILINE) )
1267     {
1268         gtk_text_freeze(GTK_TEXT(m_text));
1269     }
1270 }
1271
1272 void wxTextCtrl::Thaw()
1273 {
1274     if ( HasFlag(wxTE_MULTILINE) )
1275     {
1276         GTK_TEXT(m_text)->vadj->value = 0.0;
1277
1278         gtk_text_thaw(GTK_TEXT(m_text));
1279     }
1280 }
1281
1282 // ----------------------------------------------------------------------------
1283 // scrolling
1284 // ----------------------------------------------------------------------------
1285
1286 GtkAdjustment *wxTextCtrl::GetVAdj() const
1287 {
1288     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1289 }
1290
1291 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1292 {
1293     float value = adj->value + diff;
1294
1295     if ( value < 0 )
1296         value = 0;
1297
1298     float upper = adj->upper - adj->page_size;
1299     if ( value > upper )
1300         value = upper;
1301
1302     // did we noticeably change the scroll position?
1303     if ( fabs(adj->value - value) < 0.2 )
1304     {
1305         // well, this is what Robert does in wxScrollBar, so it must be good...
1306         return FALSE;
1307     }
1308
1309     adj->value = value;
1310
1311     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1312
1313     return TRUE;
1314 }
1315
1316 bool wxTextCtrl::ScrollLines(int lines)
1317 {
1318     GtkAdjustment *adj = GetVAdj();
1319     if ( !adj )
1320         return FALSE;
1321
1322     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1323     static const int KEY_SCROLL_PIXELS = 10;
1324
1325     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1326 }
1327
1328 bool wxTextCtrl::ScrollPages(int pages)
1329 {
1330     GtkAdjustment *adj = GetVAdj();
1331     if ( !adj )
1332         return FALSE;
1333
1334     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1335 }
1336