src/gtk/textctrl.cpp

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