src/gtk1/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/textctrl.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/intl.h"
  17     #include "wx/log.h"
  18     #include "wx/utils.h"
  19     #include "wx/panel.h"
  20     #include "wx/settings.h"
  21     #include "wx/math.h"
  22 #endif
  23
  24 #include "wx/strconv.h"
  25 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/gtk1/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern wxCursor   g_globalCursor;
  46 extern wxWindowGTK *g_delayedFocus;
  47
  48 // ----------------------------------------------------------------------------
  49 // helpers
  50 // ----------------------------------------------------------------------------
  51
  52 extern "C" {
  53 static void wxGtkTextInsert(GtkWidget *text,
  54                             const wxTextAttr& attr,
  55                             const char *txt,
  56                             size_t len)
  57 {
  58     wxFont tmpFont;
  59     GdkFont *font;
  60     if (attr.HasFont())
  61     {
  62         tmpFont = attr.GetFont();
  63
  64         // FIXME: if this crashes because tmpFont goes out of scope and the GdkFont is
  65         // deleted, then we need to call gdk_font_ref on font.
  66         // This is because attr.GetFont() now returns a temporary font since wxTextAttr
  67         // no longer stores a wxFont object, for efficiency.
  68
  69         font = tmpFont.GetInternalFont();
  70     }
  71     else
  72         font  = NULL;
  73
  74     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  75                                            : NULL;
  76
  77     GdkColor *colBg = attr.HasBackgroundColour()
  78                         ? attr.GetBackgroundColour().GetColor()
  79                         : NULL;
  80
  81     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  82 }
  83 }
  84
  85 // ----------------------------------------------------------------------------
  86 // "insert_text" for GtkEntry
  87 // ----------------------------------------------------------------------------
  88
  89 extern "C" {
  90 static void
  91 gtk_insert_text_callback(GtkEditable *editable,
  92                          const gchar *WXUNUSED(new_text),
  93                          gint WXUNUSED(new_text_length),
  94                          gint *WXUNUSED(position),
  95                          wxTextCtrl *win)
  96 {
  97     if (g_isIdle)
  98         wxapp_install_idle_handler();
  99
 100     // we should only be called if we have a max len limit at all
 101     GtkEntry *entry = GTK_ENTRY (editable);
 102
 103     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
 104
 105     // check that we don't overflow the max length limit
 106     //
 107     // FIXME: this doesn't work when we paste a string which is going to be
 108     //        truncated
 109     if ( entry->text_length == entry->text_max_length )
 110     {
 111         // we don't need to run the base class version at all
 112         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 113
 114         // remember that the next changed signal is to be ignored to avoid
 115         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 116         win->IgnoreNextTextUpdate();
 117
 118         // and generate the correct one ourselves
 119         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 120         event.SetEventObject(win);
 121         event.SetString(win->GetValue());
 122         win->HandleWindowEvent( event );
 123     }
 124 }
 125 }
 126
 127 //-----------------------------------------------------------------------------
 128 //  "changed"
 129 //-----------------------------------------------------------------------------
 130
 131 extern "C" {
 132 static void
 133 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 134 {
 135     if ( win->IgnoreTextUpdate() )
 136         return;
 137
 138     if (!win->m_hasVMT) return;
 139
 140     if (g_isIdle)
 141         wxapp_install_idle_handler();
 142
 143     win->SetModified();
 144     win->UpdateFontIfNeeded();
 145
 146     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 147     event.SetEventObject( win );
 148     win->HandleWindowEvent( event );
 149 }
 150 }
 151
 152 //-----------------------------------------------------------------------------
 153 // "changed" from vertical scrollbar
 154 //-----------------------------------------------------------------------------
 155
 156 extern "C" {
 157 static void
 158 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 159 {
 160     if (!win->m_hasVMT) return;
 161
 162     if (g_isIdle)
 163         wxapp_install_idle_handler();
 164
 165     win->CalculateScrollbar();
 166 }
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // redraw callback for multiline text
 171 // ----------------------------------------------------------------------------
 172
 173 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 174 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 175 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 176 // don't do anything if we're inside wxYield()
 177
 178 extern "C" {
 179     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 180 }
 181
 182 static GtkDrawCallback gs_gtk_text_draw = NULL;
 183
 184 extern "C" {
 185 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 186 {
 187     if ( !wxTheApp->IsYielding() )
 188     {
 189         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 190                      _T("infinite recursion in wxgtk_text_draw aborted") );
 191
 192         gs_gtk_text_draw(widget, rect);
 193     }
 194 }
 195 }
 196
 197 //-----------------------------------------------------------------------------
 198 //  wxTextCtrl
 199 //-----------------------------------------------------------------------------
 200
 201 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 202
 203 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 204     EVT_CHAR(wxTextCtrl::OnChar)
 205
 206     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 207     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 208     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 209     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 210     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 211
 212     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 213     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 214     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 215     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 216     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 217 END_EVENT_TABLE()
 218
 219 void wxTextCtrl::Init()
 220 {
 221     m_ignoreNextUpdate =
 222     m_modified = false;
 223     SetUpdateFont(false);
 224     m_text =
 225     m_vScrollbar = (GtkWidget *)NULL;
 226 }
 227
 228 wxTextCtrl::~wxTextCtrl()
 229 {
 230 }
 231
 232 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 233                         wxWindowID id,
 234                         const wxString &value,
 235                         const wxPoint &pos,
 236                         const wxSize &size,
 237                         long style,
 238                         const wxValidator& validator,
 239                         const wxString &name )
 240 {
 241     Init();
 242
 243     Create( parent, id, value, pos, size, style, validator, name );
 244 }
 245
 246 bool wxTextCtrl::Create( wxWindow *parent,
 247                          wxWindowID id,
 248                          const wxString &value,
 249                          const wxPoint &pos,
 250                          const wxSize &size,
 251                          long style,
 252                          const wxValidator& validator,
 253                          const wxString &name )
 254 {
 255     m_needParent = true;
 256     m_acceptsFocus = true;
 257
 258     if (!PreCreation( parent, pos, size ) ||
 259         !CreateBase( parent, id, pos, size, style, validator, name ))
 260     {
 261         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 262         return false;
 263     }
 264
 265
 266     m_vScrollbarVisible = false;
 267
 268     bool multi_line = (style & wxTE_MULTILINE) != 0;
 269
 270     if (multi_line)
 271     {
 272         // create our control ...
 273         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 274
 275         // ... and put into the upper left hand corner of the table
 276         bool bHasHScrollbar = false;
 277         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 278         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 279         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 280                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 281                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 282                        0, 0);
 283
 284         // always wrap words
 285         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 286
 287         // finally, put the vertical scrollbar in the upper right corner
 288         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 289         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 290         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 291                      GTK_FILL,
 292                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 293                      0, 0);
 294     }
 295     else
 296     {
 297         // a single-line text control: no need for scrollbars
 298         m_widget =
 299         m_text = gtk_entry_new();
 300     }
 301
 302     m_parent->DoAddChild( this );
 303
 304     m_focusWidget = m_text;
 305
 306     PostCreation(size);
 307
 308     if (multi_line)
 309         gtk_widget_show(m_text);
 310
 311     if (multi_line)
 312     {
 313         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 314           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 315
 316         // only initialize gs_gtk_text_draw once, starting from the next the
 317         // klass::draw will already be wxgtk_text_draw
 318         if ( !gs_gtk_text_draw )
 319         {
 320             GtkDrawCallback&
 321                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 322
 323             gs_gtk_text_draw = draw;
 324
 325             draw = wxgtk_text_draw;
 326         }
 327     }
 328
 329     if (!value.empty())
 330     {
 331 #if !GTK_CHECK_VERSION(1, 2, 0)
 332         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 333         // gtk_editable_insert_text()
 334         gtk_widget_realize(m_text);
 335 #endif // GTK 1.0
 336
 337         gint tmp = 0;
 338 #if wxUSE_UNICODE
 339         wxWX2MBbuf val = value.mbc_str();
 340         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 341 #else
 342         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 343 #endif
 344
 345         if (multi_line)
 346         {
 347             // Bring editable's cursor uptodate. Bug in GTK.
 348             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 349         }
 350     }
 351
 352     if (style & wxTE_PASSWORD)
 353     {
 354         if (!multi_line)
 355             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 356     }
 357
 358     if (style & wxTE_READONLY)
 359     {
 360         if (!multi_line)
 361             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 362     }
 363     else
 364     {
 365         if (multi_line)
 366             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 367     }
 368
 369     // We want to be notified about text changes.
 370     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 371         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 372
 373     m_cursor = wxCursor( wxCURSOR_IBEAM );
 374
 375     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 376     SetDefaultStyle( attrDef );
 377
 378     return true;
 379 }
 380
 381
 382 void wxTextCtrl::CalculateScrollbar()
 383 {
 384     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 385
 386     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 387
 388     if (adj->upper - adj->page_size < 0.8)
 389     {
 390         if (m_vScrollbarVisible)
 391         {
 392             gtk_widget_hide( m_vScrollbar );
 393             m_vScrollbarVisible = false;
 394         }
 395     }
 396     else
 397     {
 398         if (!m_vScrollbarVisible)
 399         {
 400             gtk_widget_show( m_vScrollbar );
 401             m_vScrollbarVisible = true;
 402         }
 403     }
 404 }
 405
 406 wxString wxTextCtrl::GetValue() const
 407 {
 408     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 409
 410     wxString tmp;
 411     if (m_windowStyle & wxTE_MULTILINE)
 412     {
 413         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 414         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 415         tmp = text;
 416         g_free( text );
 417     }
 418     else
 419     {
 420         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 421     }
 422
 423     return tmp;
 424 }
 425
 426 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 427 {
 428     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 429
 430     if ( !(flags & SetValue_SendEvent) )
 431     {
 432         // do not generate events
 433         IgnoreNextTextUpdate();
 434     }
 435
 436     if (m_windowStyle & wxTE_MULTILINE)
 437     {
 438         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 439         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 440         len = 0;
 441         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 442     }
 443     else
 444     {
 445         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 446     }
 447
 448     // GRG, Jun/2000: Changed this after a lot of discussion in
 449     //   the lists. wxWidgets 2.2 will have a set of flags to
 450     //   customize this behaviour.
 451     SetInsertionPoint(0);
 452
 453     m_modified = false;
 454 }
 455
 456 void wxTextCtrl::WriteText( const wxString &text )
 457 {
 458     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 459
 460     if ( text.empty() )
 461         return;
 462
 463     // gtk_text_changed_callback() will set m_modified to true but m_modified
 464     // shouldn't be changed by the program writing to the text control itself,
 465     // so save the old value and restore when we're done
 466     bool oldModified = m_modified;
 467
 468     if ( m_windowStyle & wxTE_MULTILINE )
 469     {
 470         // After cursor movements, gtk_text_get_point() is wrong by one.
 471         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 472
 473         // always use m_defaultStyle, even if it is empty as otherwise
 474         // resetting the style and appending some more text wouldn't work: if
 475         // we don't specify the style explicitly, the old style would be used
 476         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 477         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 478
 479         // we called wxGtkTextInsert with correct font, no need to do anything
 480         // in UpdateFontIfNeeded() any longer
 481         if ( !text.empty() )
 482         {
 483             SetUpdateFont(false);
 484         }
 485
 486         // Bring editable's cursor back uptodate.
 487         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 488     }
 489     else // single line
 490     {
 491         // First remove the selection if there is one
 492         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 493
 494         // This moves the cursor pos to behind the inserted text.
 495         gint len = GET_EDITABLE_POS(m_text);
 496
 497         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 498
 499         // Bring entry's cursor uptodate.
 500         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 501     }
 502
 503     m_modified = oldModified;
 504 }
 505
 506 void wxTextCtrl::AppendText( const wxString &text )
 507 {
 508     SetInsertionPointEnd();
 509     WriteText( text );
 510 }
 511
 512 wxString wxTextCtrl::GetLineText( long lineNo ) const
 513 {
 514     if (m_windowStyle & wxTE_MULTILINE)
 515     {
 516         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 517         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 518
 519         if (text)
 520         {
 521             wxString buf;
 522             long i;
 523             int currentLine = 0;
 524             for (i = 0; currentLine != lineNo && text[i]; i++ )
 525                 if (text[i] == '\n')
 526             currentLine++;
 527             // Now get the text
 528             int j;
 529             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 530                 buf += text[i];
 531
 532             g_free( text );
 533             return buf;
 534         }
 535         else
 536         {
 537             return wxEmptyString;
 538         }
 539     }
 540     else
 541     {
 542         if (lineNo == 0) return GetValue();
 543         return wxEmptyString;
 544     }
 545 }
 546
 547 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 548 {
 549   /* If you implement this, don't forget to update the documentation!
 550    * (file docs/latex/wx/text.tex) */
 551     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 552 }
 553
 554 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 555 {
 556     if ( m_windowStyle & wxTE_MULTILINE )
 557     {
 558         wxString text = GetValue();
 559
 560         // cast to prevent warning. But pos really should've been unsigned.
 561         if( (unsigned long)pos > text.length()  )
 562             return false;
 563
 564         *x=0;   // First Col
 565         *y=0;   // First Line
 566
 567         const wxChar* stop = text.c_str() + pos;
 568         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 569         {
 570             if (*p == wxT('\n'))
 571             {
 572                 (*y)++;
 573                 *x=0;
 574             }
 575             else
 576                 (*x)++;
 577         }
 578     }
 579     else // single line control
 580     {
 581         if ( pos <= GTK_ENTRY(m_text)->text_length )
 582         {
 583             *y = 0;
 584             *x = pos;
 585         }
 586         else
 587         {
 588             // index out of bounds
 589             return false;
 590         }
 591     }
 592
 593     return true;
 594 }
 595
 596 long wxTextCtrl::XYToPosition(long x, long y ) const
 597 {
 598     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 599
 600     long pos=0;
 601     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 602
 603     pos += x;
 604     return pos;
 605 }
 606
 607 int wxTextCtrl::GetLineLength(long lineNo) const
 608 {
 609     wxString str = GetLineText (lineNo);
 610     return (int) str.length();
 611 }
 612
 613 int wxTextCtrl::GetNumberOfLines() const
 614 {
 615     if (m_windowStyle & wxTE_MULTILINE)
 616     {
 617         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 618         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 619
 620         if (text)
 621         {
 622             int currentLine = 0;
 623             for (int i = 0; i < len; i++ )
 624             {
 625                 if (text[i] == '\n')
 626                     currentLine++;
 627             }
 628             g_free( text );
 629
 630             // currentLine is 0 based, add 1 to get number of lines
 631             return currentLine + 1;
 632         }
 633         else
 634         {
 635             return 0;
 636         }
 637     }
 638     else
 639     {
 640         return 1;
 641     }
 642 }
 643
 644 void wxTextCtrl::SetInsertionPoint( long pos )
 645 {
 646     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 647
 648     if ( IsMultiLine() )
 649     {
 650         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 651           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 652
 653         /* we fake a set_point by inserting and deleting. as the user
 654            isn't supposed to get to know about this non-sense, we
 655            disconnect so that no events are sent to the user program. */
 656
 657         gint tmp = (gint)pos;
 658         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 659         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 660
 661         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 662           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 663
 664         // bring editable's cursor uptodate. Bug in GTK.
 665         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 666     }
 667     else
 668     {
 669         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 670
 671         // Bring editable's cursor uptodate. Bug in GTK.
 672         SET_EDITABLE_POS(m_text, (guint32)pos);
 673     }
 674 }
 675
 676 void wxTextCtrl::SetInsertionPointEnd()
 677 {
 678     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 679
 680     if (m_windowStyle & wxTE_MULTILINE)
 681     {
 682         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 683     }
 684     else
 685     {
 686         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 687     }
 688 }
 689
 690 void wxTextCtrl::SetEditable( bool editable )
 691 {
 692     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 693
 694     if (m_windowStyle & wxTE_MULTILINE)
 695     {
 696         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 697     }
 698     else
 699     {
 700         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 701     }
 702 }
 703
 704 void wxTextCtrl::DoEnable( bool enable )
 705 {
 706     if (m_windowStyle & wxTE_MULTILINE)
 707     {
 708         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 709     }
 710     else
 711     {
 712         gtk_widget_set_sensitive( m_text, enable );
 713     }
 714 }
 715
 716 // wxGTK-specific: called recursively by Enable,
 717 // to give widgets an oppprtunity to correct their colours after they
 718 // have been changed by Enable
 719 void wxTextCtrl::OnEnabled( bool WXUNUSED(enable) )
 720 {
 721     if ( IsSingleLine() )
 722         return;
 723
 724     // If we have a custom background colour, we use this colour in both
 725     // disabled and enabled mode, or we end up with a different colour under the
 726     // text.
 727     wxColour oldColour = GetBackgroundColour();
 728     if (oldColour.Ok())
 729     {
 730         // Need to set twice or it'll optimize the useful stuff out
 731         if (oldColour == * wxWHITE)
 732             SetBackgroundColour(*wxBLACK);
 733         else
 734             SetBackgroundColour(*wxWHITE);
 735         SetBackgroundColour(oldColour);
 736     }
 737 }
 738
 739 void wxTextCtrl::MarkDirty()
 740 {
 741     m_modified = true;
 742 }
 743
 744 void wxTextCtrl::DiscardEdits()
 745 {
 746     m_modified = false;
 747 }
 748
 749 // ----------------------------------------------------------------------------
 750 // max text length support
 751 // ----------------------------------------------------------------------------
 752
 753 void wxTextCtrl::IgnoreNextTextUpdate()
 754 {
 755     m_ignoreNextUpdate = true;
 756 }
 757
 758 bool wxTextCtrl::IgnoreTextUpdate()
 759 {
 760     if ( m_ignoreNextUpdate )
 761     {
 762         m_ignoreNextUpdate = false;
 763
 764         return true;
 765     }
 766
 767     return false;
 768 }
 769
 770 void wxTextCtrl::SetMaxLength(unsigned long len)
 771 {
 772     if ( !HasFlag(wxTE_MULTILINE) )
 773     {
 774         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 775
 776         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 777         // we had tried to enter more text than allowed by max text length and
 778         // the text wasn't really changed
 779         //
 780         // to detect this and generate TEXT_MAXLEN event instead of
 781         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 782         //
 783         // when max len is set to 0 we disconnect our handler as it means that
 784         // we shouldn't check anything any more
 785         if ( len )
 786         {
 787             gtk_signal_connect( GTK_OBJECT(m_text),
 788                                 "insert_text",
 789                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 790                                 (gpointer)this);
 791         }
 792         else // no checking
 793         {
 794             gtk_signal_disconnect_by_func
 795             (
 796                 GTK_OBJECT(m_text),
 797                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 798                 (gpointer)this
 799             );
 800         }
 801     }
 802 }
 803
 804 void wxTextCtrl::SetSelection( long from, long to )
 805 {
 806     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 807
 808     if (from == -1 && to == -1)
 809     {
 810         from = 0;
 811         to = GetValue().length();
 812     }
 813
 814     if ( (m_windowStyle & wxTE_MULTILINE) &&
 815          !GTK_TEXT(m_text)->line_start_cache )
 816     {
 817         // tell the programmer that it didn't work
 818         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 819         return;
 820     }
 821
 822     if (m_windowStyle & wxTE_MULTILINE)
 823     {
 824         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 825     }
 826     else
 827     {
 828         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 829     }
 830 }
 831
 832 void wxTextCtrl::ShowPosition( long pos )
 833 {
 834     if (m_windowStyle & wxTE_MULTILINE)
 835     {
 836         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 837         float totalLines =  (float) GetNumberOfLines();
 838         long posX;
 839         long posY;
 840         PositionToXY(pos, &posX, &posY);
 841         float posLine = (float) posY;
 842         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 843         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 844     }
 845 }
 846
 847 long wxTextCtrl::GetInsertionPoint() const
 848 {
 849     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 850     return (long) GET_EDITABLE_POS(m_text);
 851 }
 852
 853 wxTextPos wxTextCtrl::GetLastPosition() const
 854 {
 855     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 856
 857     int pos = 0;
 858
 859     if (m_windowStyle & wxTE_MULTILINE)
 860     {
 861         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 862     }
 863     else
 864     {
 865         pos = GTK_ENTRY(m_text)->text_length;
 866     }
 867
 868     return (long)pos;
 869 }
 870
 871 void wxTextCtrl::Remove( long from, long to )
 872 {
 873     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 874     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 875 }
 876
 877 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 878 {
 879     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 880
 881     Remove( from, to );
 882
 883     if (!value.empty())
 884     {
 885         gint pos = (gint)from;
 886 #if wxUSE_UNICODE
 887         wxWX2MBbuf buf = value.mbc_str();
 888         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 889 #else
 890         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 891 #endif // wxUSE_UNICODE
 892     }
 893 }
 894
 895 void wxTextCtrl::Cut()
 896 {
 897     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 898     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 899 }
 900
 901 void wxTextCtrl::Copy()
 902 {
 903     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 904     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 905 }
 906
 907 void wxTextCtrl::Paste()
 908 {
 909     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 910     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 911 }
 912
 913 // Undo/redo
 914 void wxTextCtrl::Undo()
 915 {
 916     // TODO
 917     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 918 }
 919
 920 void wxTextCtrl::Redo()
 921 {
 922     // TODO
 923     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 924 }
 925
 926 bool wxTextCtrl::CanUndo() const
 927 {
 928     // TODO
 929     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 930     return false;
 931 }
 932
 933 bool wxTextCtrl::CanRedo() const
 934 {
 935     // TODO
 936     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 937     return false;
 938 }
 939
 940 // If the return values from and to are the same, there is no
 941 // selection.
 942 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 943 {
 944     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 945
 946     gint from = -1;
 947     gint to = -1;
 948     bool haveSelection = false;
 949
 950      if ( (GTK_EDITABLE(m_text)->has_selection) )
 951      {
 952          haveSelection = true;
 953          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 954          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 955      }
 956
 957      if (! haveSelection )
 958           from = to = GetInsertionPoint();
 959
 960      if ( from > to )
 961      {
 962          // exchange them to be compatible with wxMSW
 963          gint tmp = from;
 964          from = to;
 965          to = tmp;
 966      }
 967
 968     if ( fromOut )
 969         *fromOut = from;
 970     if ( toOut )
 971         *toOut = to;
 972 }
 973
 974
 975 bool wxTextCtrl::IsEditable() const
 976 {
 977     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 978     return GTK_EDITABLE(m_text)->editable;
 979 }
 980
 981 bool wxTextCtrl::IsModified() const
 982 {
 983     return m_modified;
 984 }
 985
 986 void wxTextCtrl::Clear()
 987 {
 988     SetValue( wxEmptyString );
 989 }
 990
 991 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 992 {
 993     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 994
 995     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 996     {
 997         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 998         event.SetEventObject(this);
 999         event.SetString(GetValue());
1000         if (HandleWindowEvent(event)) return;
1001     }
1002
1003     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1004     {
1005         // This will invoke the dialog default action, such
1006         // as the clicking the default button.
1007
1008         wxWindow *top_frame = m_parent;
1009         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1010             top_frame = top_frame->GetParent();
1011
1012         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1013         {
1014             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1015
1016             if (window->default_widget)
1017             {
1018                 gtk_widget_activate (window->default_widget);
1019                 return;
1020             }
1021         }
1022     }
1023
1024     key_event.Skip();
1025 }
1026
1027 GtkWidget* wxTextCtrl::GetConnectWidget()
1028 {
1029     return GTK_WIDGET(m_text);
1030 }
1031
1032 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1033 {
1034     if (m_windowStyle & wxTE_MULTILINE)
1035     {
1036         return (window == GTK_TEXT(m_text)->text_area);
1037     }
1038     else
1039     {
1040         return (window == GTK_ENTRY(m_text)->text_area);
1041     }
1042 }
1043
1044 // the font will change for subsequent text insertiongs
1045 bool wxTextCtrl::SetFont( const wxFont &font )
1046 {
1047     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1048
1049     if ( !wxTextCtrlBase::SetFont(font) )
1050     {
1051         // font didn't change, nothing to do
1052         return false;
1053     }
1054
1055     if ( m_windowStyle & wxTE_MULTILINE )
1056     {
1057         SetUpdateFont(true);
1058
1059         m_defaultStyle.SetFont(font);
1060
1061         ChangeFontGlobally();
1062     }
1063
1064     return true;
1065 }
1066
1067 void wxTextCtrl::ChangeFontGlobally()
1068 {
1069     // this method is very inefficient and hence should be called as rarely as
1070     // possible!
1071     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1072
1073                   _T("shouldn't be called for single line controls") );
1074
1075     wxString value = GetValue();
1076     if ( !value.empty() )
1077     {
1078         SetUpdateFont(false);
1079
1080         Clear();
1081         AppendText(value);
1082     }
1083 }
1084
1085 void wxTextCtrl::UpdateFontIfNeeded()
1086 {
1087     if ( m_updateFont )
1088         ChangeFontGlobally();
1089 }
1090
1091 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1092 {
1093     if ( !wxControl::SetForegroundColour(colour) )
1094         return false;
1095
1096     // update default fg colour too
1097     m_defaultStyle.SetTextColour(colour);
1098
1099     return true;
1100 }
1101
1102 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1103 {
1104     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1105
1106     if ( !wxControl::SetBackgroundColour( colour ) )
1107         return false;
1108
1109     if (!m_widget->window)
1110         return false;
1111
1112     if (!m_backgroundColour.Ok())
1113         return false;
1114
1115     if (m_windowStyle & wxTE_MULTILINE)
1116     {
1117         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1118         if (!window)
1119             return false;
1120         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1121         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1122         gdk_window_clear( window );
1123     }
1124
1125     // change active background color too
1126     m_defaultStyle.SetBackgroundColour( colour );
1127
1128     return true;
1129 }
1130
1131 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1132 {
1133     if ( m_windowStyle & wxTE_MULTILINE )
1134     {
1135         if ( style.IsDefault() )
1136         {
1137             // nothing to do
1138             return true;
1139         }
1140
1141         // VERY dirty way to do that - removes the required text and re-adds it
1142         // with styling (FIXME)
1143
1144         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1145
1146         wxCHECK_MSG( start >= 0 && end <= l, false,
1147                      _T("invalid range in wxTextCtrl::SetStyle") );
1148
1149         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1150         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1151         wxString tmp(text,*wxConvCurrent);
1152         g_free( text );
1153
1154         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1155         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1156
1157     #if wxUSE_UNICODE
1158         wxWX2MBbuf buf = tmp.mbc_str();
1159         const char *txt = buf;
1160         size_t txtlen = strlen(buf);
1161     #else
1162         const char *txt = tmp;
1163         size_t txtlen = tmp.length();
1164     #endif
1165
1166         // use the attributes from style which are set in it and fall back
1167         // first to the default style and then to the text control default
1168         // colours for the others
1169         wxGtkTextInsert(m_text,
1170                         wxTextAttr::Combine(style, m_defaultStyle, this),
1171                         txt,
1172                         txtlen);
1173
1174         /* does not seem to help under GTK+ 1.2 !!!
1175         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1176         SetInsertionPoint( old_pos );
1177
1178         return true;
1179     }
1180
1181     // else single line
1182     // cannot do this for GTK+'s Entry widget
1183     return false;
1184 }
1185
1186 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1187 {
1188     gtk_widget_modify_style(m_text, style);
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     if (g_delayedFocus == this)
1266     {
1267         if (GTK_WIDGET_REALIZED(m_widget))
1268         {
1269             gtk_widget_grab_focus( m_widget );
1270             g_delayedFocus = NULL;
1271         }
1272     }
1273
1274     if (wxUpdateUIEvent::CanUpdate(this))
1275         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1276 }
1277
1278 wxSize wxTextCtrl::DoGetBestSize() const
1279 {
1280     // FIXME should be different for multi-line controls...
1281     wxSize ret( wxControl::DoGetBestSize() );
1282     wxSize best(80, ret.y);
1283     CacheBestSize(best);
1284     return best;
1285 }
1286
1287 // ----------------------------------------------------------------------------
1288 // freeze/thaw
1289 // ----------------------------------------------------------------------------
1290
1291 void wxTextCtrl::DoFreeze()
1292 {
1293     if ( HasFlag(wxTE_MULTILINE) )
1294     {
1295         gtk_text_freeze(GTK_TEXT(m_text));
1296     }
1297 }
1298
1299 void wxTextCtrl::DoThaw()
1300 {
1301     if ( HasFlag(wxTE_MULTILINE) )
1302     {
1303         GTK_TEXT(m_text)->vadj->value = 0.0;
1304
1305         gtk_text_thaw(GTK_TEXT(m_text));
1306     }
1307 }
1308
1309 // ----------------------------------------------------------------------------
1310 // scrolling
1311 // ----------------------------------------------------------------------------
1312
1313 GtkAdjustment *wxTextCtrl::GetVAdj() const
1314 {
1315     if ( !IsMultiLine() )
1316         return NULL;
1317
1318     return GTK_TEXT(m_text)->vadj;
1319 }
1320
1321 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1322 {
1323     float value = adj->value + diff;
1324
1325     if ( value < 0 )
1326         value = 0;
1327
1328     float upper = adj->upper - adj->page_size;
1329     if ( value > upper )
1330         value = upper;
1331
1332     // did we noticeably change the scroll position?
1333     if ( fabs(adj->value - value) < 0.2 )
1334     {
1335         // well, this is what Robert does in wxScrollBar, so it must be good...
1336         return false;
1337     }
1338
1339     adj->value = value;
1340     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1341
1342     return true;
1343 }
1344
1345 bool wxTextCtrl::ScrollLines(int lines)
1346 {
1347     GtkAdjustment *adj = GetVAdj();
1348     if ( !adj )
1349         return false;
1350
1351     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1352     int diff = 10*lines;
1353
1354     return DoScroll(adj, diff);
1355 }
1356
1357 bool wxTextCtrl::ScrollPages(int pages)
1358 {
1359     GtkAdjustment *adj = GetVAdj();
1360     if ( !adj )
1361         return false;
1362
1363     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1364 }
1365
1366
1367 // static
1368 wxVisualAttributes
1369 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1370 {
1371     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1372 }