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