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/app.h"
  17     #include "wx/intl.h"
  18     #include "wx/log.h"
  19     #include "wx/utils.h"
  20     #include "wx/panel.h"
  21     #include "wx/settings.h"
  22     #include "wx/math.h"
  23 #endif
  24
  25 #include "wx/strconv.h"
  26 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  27 #include "wx/evtloop.h"
  28
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <ctype.h>
  32
  33 #include "wx/gtk1/private.h"
  34 #include <gdk/gdkkeysyms.h>
  35
  36 //-----------------------------------------------------------------------------
  37 // idle system
  38 //-----------------------------------------------------------------------------
  39
  40 extern void wxapp_install_idle_handler();
  41 extern bool g_isIdle;
  42
  43 //-----------------------------------------------------------------------------
  44 // data
  45 //-----------------------------------------------------------------------------
  46
  47 extern wxCursor   g_globalCursor;
  48 extern wxWindowGTK *g_delayedFocus;
  49
  50 // ----------------------------------------------------------------------------
  51 // helpers
  52 // ----------------------------------------------------------------------------
  53
  54 extern "C" {
  55 static void wxGtkTextInsert(GtkWidget *text,
  56                             const wxTextAttr& attr,
  57                             const char *txt,
  58                             size_t len)
  59 {
  60     wxFont tmpFont;
  61     GdkFont *font;
  62     if (attr.HasFont())
  63     {
  64         tmpFont = attr.GetFont();
  65
  66         // FIXME: if this crashes because tmpFont goes out of scope and the GdkFont is
  67         // deleted, then we need to call gdk_font_ref on font.
  68         // This is because attr.GetFont() now returns a temporary font since wxTextAttr
  69         // no longer stores a wxFont object, for efficiency.
  70
  71         font = tmpFont.GetInternalFont();
  72     }
  73     else
  74         font  = NULL;
  75
  76     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  77                                            : NULL;
  78
  79     GdkColor *colBg = attr.HasBackgroundColour()
  80                         ? attr.GetBackgroundColour().GetColor()
  81                         : NULL;
  82
  83     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  84 }
  85 }
  86
  87 // ----------------------------------------------------------------------------
  88 // "insert_text" for GtkEntry
  89 // ----------------------------------------------------------------------------
  90
  91 extern "C" {
  92 static void
  93 gtk_insert_text_callback(GtkEditable *editable,
  94                          const gchar *WXUNUSED(new_text),
  95                          gint WXUNUSED(new_text_length),
  96                          gint *WXUNUSED(position),
  97                          wxTextCtrl *win)
  98 {
  99     if (g_isIdle)
 100         wxapp_install_idle_handler();
 101
 102     // we should only be called if we have a max len limit at all
 103     GtkEntry *entry = GTK_ENTRY (editable);
 104
 105     wxCHECK_RET( entry->text_max_length, wxT("shouldn't be called") );
 106
 107     // check that we don't overflow the max length limit
 108     //
 109     // FIXME: this doesn't work when we paste a string which is going to be
 110     //        truncated
 111     if ( entry->text_length == entry->text_max_length )
 112     {
 113         // we don't need to run the base class version at all
 114         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 115
 116         // remember that the next changed signal is to be ignored to avoid
 117         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 118         win->IgnoreNextTextUpdate();
 119
 120         // and generate the correct one ourselves
 121         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 122         event.SetEventObject(win);
 123         event.SetString(win->GetValue());
 124         win->HandleWindowEvent( event );
 125     }
 126 }
 127 }
 128
 129 //-----------------------------------------------------------------------------
 130 //  "changed"
 131 //-----------------------------------------------------------------------------
 132
 133 extern "C" {
 134 static void
 135 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 136 {
 137     if ( win->IgnoreTextUpdate() )
 138         return;
 139
 140     if (!win->m_hasVMT) return;
 141
 142     if (g_isIdle)
 143         wxapp_install_idle_handler();
 144
 145     win->SetModified();
 146     win->UpdateFontIfNeeded();
 147
 148     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 149     event.SetEventObject( win );
 150     win->HandleWindowEvent( event );
 151 }
 152 }
 153
 154 //-----------------------------------------------------------------------------
 155 // "changed" from vertical scrollbar
 156 //-----------------------------------------------------------------------------
 157
 158 extern "C" {
 159 static void
 160 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 161 {
 162     if (!win->m_hasVMT) return;
 163
 164     if (g_isIdle)
 165         wxapp_install_idle_handler();
 166
 167     win->CalculateScrollbar();
 168 }
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // redraw callback for multiline text
 173 // ----------------------------------------------------------------------------
 174
 175 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 176 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 177 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 178 // don't do anything if we're inside wxYield()
 179
 180 extern "C" {
 181     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 182 }
 183
 184 static GtkDrawCallback gs_gtk_text_draw = NULL;
 185
 186 extern "C" {
 187 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 188 {
 189     wxEventLoopBase* loop = wxEventLoopBase::GetActive();
 190     if ( loop && !loop->IsYielding() )
 191     {
 192         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 193                      wxT("infinite recursion in wxgtk_text_draw aborted") );
 194
 195         gs_gtk_text_draw(widget, rect);
 196     }
 197 }
 198 }
 199
 200 //-----------------------------------------------------------------------------
 201 //  wxTextCtrl
 202 //-----------------------------------------------------------------------------
 203
 204 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 205
 206 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 207     EVT_CHAR(wxTextCtrl::OnChar)
 208
 209     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 210     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 211     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 212     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 213     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 214
 215     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 216     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 217     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 218     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 219     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 220 END_EVENT_TABLE()
 221
 222 void wxTextCtrl::Init()
 223 {
 224     m_ignoreNextUpdate =
 225     m_modified = false;
 226     SetUpdateFont(false);
 227     m_text =
 228     m_vScrollbar = NULL;
 229 }
 230
 231 wxTextCtrl::~wxTextCtrl()
 232 {
 233 }
 234
 235 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 236                         wxWindowID id,
 237                         const wxString &value,
 238                         const wxPoint &pos,
 239                         const wxSize &size,
 240                         long style,
 241                         const wxValidator& validator,
 242                         const wxString &name )
 243 {
 244     Init();
 245
 246     Create( parent, id, value, pos, size, style, validator, name );
 247 }
 248
 249 bool wxTextCtrl::Create( wxWindow *parent,
 250                          wxWindowID id,
 251                          const wxString &value,
 252                          const wxPoint &pos,
 253                          const wxSize &size,
 254                          long style,
 255                          const wxValidator& validator,
 256                          const wxString &name )
 257 {
 258     m_needParent = true;
 259     m_acceptsFocus = true;
 260
 261     if (!PreCreation( parent, pos, size ) ||
 262         !CreateBase( parent, id, pos, size, style, validator, name ))
 263     {
 264         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 265         return false;
 266     }
 267
 268
 269     m_vScrollbarVisible = false;
 270
 271     bool multi_line = (style & wxTE_MULTILINE) != 0;
 272
 273     if (multi_line)
 274     {
 275         // create our control ...
 276         m_text = gtk_text_new( NULL, NULL );
 277
 278         // ... and put into the upper left hand corner of the table
 279         bool bHasHScrollbar = false;
 280         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 281         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 282         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 283                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 284                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 285                        0, 0);
 286
 287         // always wrap words
 288         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 289
 290         // finally, put the vertical scrollbar in the upper right corner
 291         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 292         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 293         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 294                      GTK_FILL,
 295                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 296                      0, 0);
 297     }
 298     else
 299     {
 300         // a single-line text control: no need for scrollbars
 301         m_widget =
 302         m_text = gtk_entry_new();
 303     }
 304
 305     m_parent->DoAddChild( this );
 306
 307     m_focusWidget = m_text;
 308
 309     PostCreation(size);
 310
 311     if (multi_line)
 312         gtk_widget_show(m_text);
 313
 314     if (multi_line)
 315     {
 316         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 317           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 318
 319         // only initialize gs_gtk_text_draw once, starting from the next the
 320         // klass::draw will already be wxgtk_text_draw
 321         if ( !gs_gtk_text_draw )
 322         {
 323             GtkDrawCallback&
 324                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 325
 326             gs_gtk_text_draw = draw;
 327
 328             draw = wxgtk_text_draw;
 329         }
 330     }
 331
 332     if (!value.empty())
 333     {
 334 #if !GTK_CHECK_VERSION(1, 2, 0)
 335         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 336         // gtk_editable_insert_text()
 337         gtk_widget_realize(m_text);
 338 #endif // GTK 1.0
 339
 340         gint tmp = 0;
 341 #if wxUSE_UNICODE
 342         wxWX2MBbuf val = value.mbc_str();
 343         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 344 #else
 345         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &tmp );
 346 #endif
 347
 348         if (multi_line)
 349         {
 350             // Bring editable's cursor uptodate. Bug in GTK.
 351             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 352         }
 353     }
 354
 355     if (style & wxTE_PASSWORD)
 356     {
 357         if (!multi_line)
 358             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 359     }
 360
 361     if (style & wxTE_READONLY)
 362     {
 363         if (!multi_line)
 364             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 365     }
 366     else
 367     {
 368         if (multi_line)
 369             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 370     }
 371
 372     // We want to be notified about text changes.
 373     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 374         GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 375
 376     m_cursor = wxCursor( wxCURSOR_IBEAM );
 377
 378     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 379     SetDefaultStyle( attrDef );
 380
 381     return true;
 382 }
 383
 384
 385 void wxTextCtrl::CalculateScrollbar()
 386 {
 387     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 388
 389     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 390
 391     if (adj->upper - adj->page_size < 0.8)
 392     {
 393         if (m_vScrollbarVisible)
 394         {
 395             gtk_widget_hide( m_vScrollbar );
 396             m_vScrollbarVisible = false;
 397         }
 398     }
 399     else
 400     {
 401         if (!m_vScrollbarVisible)
 402         {
 403             gtk_widget_show( m_vScrollbar );
 404             m_vScrollbarVisible = true;
 405         }
 406     }
 407 }
 408
 409 wxString wxTextCtrl::DoGetValue() const
 410 {
 411     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 412
 413     wxString tmp;
 414     if (m_windowStyle & wxTE_MULTILINE)
 415     {
 416         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 417         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 418         tmp = text;
 419         g_free( text );
 420     }
 421     else
 422     {
 423         tmp = wxGTK_CONV_BACK( gtk_entry_get_text( GTK_ENTRY(m_text) ) );
 424     }
 425
 426     return tmp;
 427 }
 428
 429 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 430 {
 431     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 432
 433     if ( !(flags & SetValue_SendEvent) )
 434     {
 435         // do not generate events
 436         IgnoreNextTextUpdate();
 437     }
 438
 439     if (m_windowStyle & wxTE_MULTILINE)
 440     {
 441         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 442         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 443         len = 0;
 444         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.length(), &len );
 445     }
 446     else
 447     {
 448         gtk_entry_set_text( GTK_ENTRY(m_text), wxGTK_CONV( value ) );
 449     }
 450
 451     // GRG, Jun/2000: Changed this after a lot of discussion in
 452     //   the lists. wxWidgets 2.2 will have a set of flags to
 453     //   customize this behaviour.
 454     SetInsertionPoint(0);
 455
 456     m_modified = false;
 457 }
 458
 459 void wxTextCtrl::WriteText( const wxString &text )
 460 {
 461     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 462
 463     if ( text.empty() )
 464         return;
 465
 466     // gtk_text_changed_callback() will set m_modified to true but m_modified
 467     // shouldn't be changed by the program writing to the text control itself,
 468     // so save the old value and restore when we're done
 469     bool oldModified = m_modified;
 470
 471     if ( m_windowStyle & wxTE_MULTILINE )
 472     {
 473         // After cursor movements, gtk_text_get_point() is wrong by one.
 474         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 475
 476         // always use m_defaultStyle, even if it is empty as otherwise
 477         // resetting the style and appending some more text wouldn't work: if
 478         // we don't specify the style explicitly, the old style would be used
 479         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 480         wxGtkTextInsert(m_text, m_defaultStyle, text.c_str(), text.length());
 481
 482         // we called wxGtkTextInsert with correct font, no need to do anything
 483         // in UpdateFontIfNeeded() any longer
 484         if ( !text.empty() )
 485         {
 486             SetUpdateFont(false);
 487         }
 488
 489         // Bring editable's cursor back uptodate.
 490         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 491     }
 492     else // single line
 493     {
 494         // First remove the selection if there is one
 495         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
 496
 497         // This moves the cursor pos to behind the inserted text.
 498         gint len = GET_EDITABLE_POS(m_text);
 499
 500         gtk_editable_insert_text( GTK_EDITABLE(m_text), text.c_str(), text.length(), &len );
 501
 502         // Bring entry's cursor uptodate.
 503         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 504     }
 505
 506     m_modified = oldModified;
 507 }
 508
 509 void wxTextCtrl::AppendText( const wxString &text )
 510 {
 511     SetInsertionPointEnd();
 512     WriteText( text );
 513 }
 514
 515 wxString wxTextCtrl::GetLineText( long lineNo ) const
 516 {
 517     if (m_windowStyle & wxTE_MULTILINE)
 518     {
 519         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 520         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 521
 522         if (text)
 523         {
 524             wxString buf;
 525             long i;
 526             int currentLine = 0;
 527             for (i = 0; currentLine != lineNo && text[i]; i++ )
 528                 if (text[i] == '\n')
 529             currentLine++;
 530             // Now get the text
 531             int j;
 532             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 533                 buf += text[i];
 534
 535             g_free( text );
 536             return buf;
 537         }
 538         else
 539         {
 540             return wxEmptyString;
 541         }
 542     }
 543     else
 544     {
 545         if (lineNo == 0) return GetValue();
 546         return wxEmptyString;
 547     }
 548 }
 549
 550 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 551 {
 552   /* If you implement this, don't forget to update the documentation!
 553    * (file docs/latex/wx/text.tex) */
 554     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 555 }
 556
 557 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 558 {
 559     if ( m_windowStyle & wxTE_MULTILINE )
 560     {
 561         wxString text = GetValue();
 562
 563         // cast to prevent warning. But pos really should've been unsigned.
 564         if( (unsigned long)pos > text.length()  )
 565             return false;
 566
 567         *x=0;   // First Col
 568         *y=0;   // First Line
 569
 570         const wxChar* stop = text.c_str() + pos;
 571         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 572         {
 573             if (*p == wxT('\n'))
 574             {
 575                 (*y)++;
 576                 *x=0;
 577             }
 578             else
 579                 (*x)++;
 580         }
 581     }
 582     else // single line control
 583     {
 584         if ( pos <= GTK_ENTRY(m_text)->text_length )
 585         {
 586             *y = 0;
 587             *x = pos;
 588         }
 589         else
 590         {
 591             // index out of bounds
 592             return false;
 593         }
 594     }
 595
 596     return true;
 597 }
 598
 599 long wxTextCtrl::XYToPosition(long x, long y ) const
 600 {
 601     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 602
 603     long pos=0;
 604     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 605
 606     pos += x;
 607     return pos;
 608 }
 609
 610 int wxTextCtrl::GetLineLength(long lineNo) const
 611 {
 612     wxString str = GetLineText (lineNo);
 613     return (int) str.length();
 614 }
 615
 616 int wxTextCtrl::GetNumberOfLines() const
 617 {
 618     if (m_windowStyle & wxTE_MULTILINE)
 619     {
 620         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 621         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 622
 623         if (text)
 624         {
 625             int currentLine = 0;
 626             for (int i = 0; i < len; i++ )
 627             {
 628                 if (text[i] == '\n')
 629                     currentLine++;
 630             }
 631             g_free( text );
 632
 633             // currentLine is 0 based, add 1 to get number of lines
 634             return currentLine + 1;
 635         }
 636         else
 637         {
 638             return 0;
 639         }
 640     }
 641     else
 642     {
 643         return 1;
 644     }
 645 }
 646
 647 void wxTextCtrl::SetInsertionPoint( long pos )
 648 {
 649     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 650
 651     if ( IsMultiLine() )
 652     {
 653         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 654           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 655
 656         /* we fake a set_point by inserting and deleting. as the user
 657            isn't supposed to get to know about this non-sense, we
 658            disconnect so that no events are sent to the user program. */
 659
 660         gint tmp = (gint)pos;
 661         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 662         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 663
 664         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 665           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 666
 667         // bring editable's cursor uptodate. Bug in GTK.
 668         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 669     }
 670     else
 671     {
 672         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 673
 674         // Bring editable's cursor uptodate. Bug in GTK.
 675         SET_EDITABLE_POS(m_text, (guint32)pos);
 676     }
 677 }
 678
 679 void wxTextCtrl::SetInsertionPointEnd()
 680 {
 681     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 682
 683     if (m_windowStyle & wxTE_MULTILINE)
 684     {
 685         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 686     }
 687     else
 688     {
 689         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 690     }
 691 }
 692
 693 void wxTextCtrl::SetEditable( bool editable )
 694 {
 695     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 696
 697     if (m_windowStyle & wxTE_MULTILINE)
 698     {
 699         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 700     }
 701     else
 702     {
 703         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 704     }
 705 }
 706
 707 void wxTextCtrl::DoEnable( bool enable )
 708 {
 709     if (m_windowStyle & wxTE_MULTILINE)
 710     {
 711         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 712     }
 713     else
 714     {
 715         gtk_widget_set_sensitive( m_text, enable );
 716     }
 717 }
 718
 719 // wxGTK-specific: called recursively by Enable,
 720 // to give widgets an oppprtunity to correct their colours after they
 721 // have been changed by Enable
 722 void wxTextCtrl::OnEnabled( bool WXUNUSED(enable) )
 723 {
 724     if ( IsSingleLine() )
 725         return;
 726
 727     // If we have a custom background colour, we use this colour in both
 728     // disabled and enabled mode, or we end up with a different colour under the
 729     // text.
 730     wxColour oldColour = GetBackgroundColour();
 731     if (oldColour.Ok())
 732     {
 733         // Need to set twice or it'll optimize the useful stuff out
 734         if (oldColour == * wxWHITE)
 735             SetBackgroundColour(*wxBLACK);
 736         else
 737             SetBackgroundColour(*wxWHITE);
 738         SetBackgroundColour(oldColour);
 739     }
 740 }
 741
 742 void wxTextCtrl::MarkDirty()
 743 {
 744     m_modified = true;
 745 }
 746
 747 void wxTextCtrl::DiscardEdits()
 748 {
 749     m_modified = false;
 750 }
 751
 752 // ----------------------------------------------------------------------------
 753 // max text length support
 754 // ----------------------------------------------------------------------------
 755
 756 void wxTextCtrl::IgnoreNextTextUpdate()
 757 {
 758     m_ignoreNextUpdate = true;
 759 }
 760
 761 bool wxTextCtrl::IgnoreTextUpdate()
 762 {
 763     if ( m_ignoreNextUpdate )
 764     {
 765         m_ignoreNextUpdate = false;
 766
 767         return true;
 768     }
 769
 770     return false;
 771 }
 772
 773 void wxTextCtrl::SetMaxLength(unsigned long len)
 774 {
 775     if ( !HasFlag(wxTE_MULTILINE) )
 776     {
 777         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 778
 779         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 780         // we had tried to enter more text than allowed by max text length and
 781         // the text wasn't really changed
 782         //
 783         // to detect this and generate TEXT_MAXLEN event instead of
 784         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 785         //
 786         // when max len is set to 0 we disconnect our handler as it means that
 787         // we shouldn't check anything any more
 788         if ( len )
 789         {
 790             gtk_signal_connect( GTK_OBJECT(m_text),
 791                                 "insert_text",
 792                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 793                                 (gpointer)this);
 794         }
 795         else // no checking
 796         {
 797             gtk_signal_disconnect_by_func
 798             (
 799                 GTK_OBJECT(m_text),
 800                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 801                 (gpointer)this
 802             );
 803         }
 804     }
 805 }
 806
 807 void wxTextCtrl::SetSelection( long from, long to )
 808 {
 809     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 810
 811     if (from == -1 && to == -1)
 812     {
 813         from = 0;
 814         to = GetValue().length();
 815     }
 816
 817     if ( (m_windowStyle & wxTE_MULTILINE) &&
 818          !GTK_TEXT(m_text)->line_start_cache )
 819     {
 820         // tell the programmer that it didn't work
 821         wxLogDebug(wxT("Can't call SetSelection() before realizing the control"));
 822         return;
 823     }
 824
 825     if (m_windowStyle & wxTE_MULTILINE)
 826     {
 827         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 828     }
 829     else
 830     {
 831         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 832     }
 833 }
 834
 835 void wxTextCtrl::ShowPosition( long pos )
 836 {
 837     if (m_windowStyle & wxTE_MULTILINE)
 838     {
 839         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 840         float totalLines =  (float) GetNumberOfLines();
 841         long posX;
 842         long posY;
 843         PositionToXY(pos, &posX, &posY);
 844         float posLine = (float) posY;
 845         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 846         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 847     }
 848 }
 849
 850 long wxTextCtrl::GetInsertionPoint() const
 851 {
 852     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 853     return (long) GET_EDITABLE_POS(m_text);
 854 }
 855
 856 wxTextPos wxTextCtrl::GetLastPosition() const
 857 {
 858     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 859
 860     int pos = 0;
 861
 862     if (m_windowStyle & wxTE_MULTILINE)
 863     {
 864         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 865     }
 866     else
 867     {
 868         pos = GTK_ENTRY(m_text)->text_length;
 869     }
 870
 871     return (long)pos;
 872 }
 873
 874 void wxTextCtrl::Remove( long from, long to )
 875 {
 876     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 877     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 878 }
 879
 880 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 881 {
 882     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 883
 884     Remove( from, to );
 885
 886     if (!value.empty())
 887     {
 888         gint pos = (gint)from;
 889 #if wxUSE_UNICODE
 890         wxWX2MBbuf buf = value.mbc_str();
 891         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 892 #else
 893         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 894 #endif // wxUSE_UNICODE
 895     }
 896 }
 897
 898 void wxTextCtrl::Cut()
 899 {
 900     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 901     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 902 }
 903
 904 void wxTextCtrl::Copy()
 905 {
 906     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 907     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 908 }
 909
 910 void wxTextCtrl::Paste()
 911 {
 912     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 913     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 914 }
 915
 916 // Undo/redo
 917 void wxTextCtrl::Undo()
 918 {
 919     // TODO
 920     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 921 }
 922
 923 void wxTextCtrl::Redo()
 924 {
 925     // TODO
 926     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 927 }
 928
 929 bool wxTextCtrl::CanUndo() const
 930 {
 931     // TODO
 932     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 933     return false;
 934 }
 935
 936 bool wxTextCtrl::CanRedo() const
 937 {
 938     // TODO
 939     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 940     return false;
 941 }
 942
 943 // If the return values from and to are the same, there is no
 944 // selection.
 945 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 946 {
 947     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 948
 949     gint from = -1;
 950     gint to = -1;
 951     bool haveSelection = false;
 952
 953      if ( (GTK_EDITABLE(m_text)->has_selection) )
 954      {
 955          haveSelection = true;
 956          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 957          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 958      }
 959
 960      if (! haveSelection )
 961           from = to = GetInsertionPoint();
 962
 963      if ( from > to )
 964      {
 965          // exchange them to be compatible with wxMSW
 966          gint tmp = from;
 967          from = to;
 968          to = tmp;
 969      }
 970
 971     if ( fromOut )
 972         *fromOut = from;
 973     if ( toOut )
 974         *toOut = to;
 975 }
 976
 977
 978 bool wxTextCtrl::IsEditable() const
 979 {
 980     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 981     return GTK_EDITABLE(m_text)->editable;
 982 }
 983
 984 bool wxTextCtrl::IsModified() const
 985 {
 986     return m_modified;
 987 }
 988
 989 void wxTextCtrl::Clear()
 990 {
 991     SetValue( wxEmptyString );
 992 }
 993
 994 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 995 {
 996     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 997
 998     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 999     {
1000         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1001         event.SetEventObject(this);
1002         event.SetString(GetValue());
1003         if (HandleWindowEvent(event)) return;
1004     }
1005
1006     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1007     {
1008         // This will invoke the dialog default action, such
1009         // as the clicking the default button.
1010
1011         wxWindow *top_frame = m_parent;
1012         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1013             top_frame = top_frame->GetParent();
1014
1015         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1016         {
1017             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1018
1019             if (window->default_widget)
1020             {
1021                 gtk_widget_activate (window->default_widget);
1022                 return;
1023             }
1024         }
1025     }
1026
1027     key_event.Skip();
1028 }
1029
1030 GtkWidget* wxTextCtrl::GetConnectWidget()
1031 {
1032     return GTK_WIDGET(m_text);
1033 }
1034
1035 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1036 {
1037     if (m_windowStyle & wxTE_MULTILINE)
1038     {
1039         return (window == GTK_TEXT(m_text)->text_area);
1040     }
1041     else
1042     {
1043         return (window == GTK_ENTRY(m_text)->text_area);
1044     }
1045 }
1046
1047 // the font will change for subsequent text insertiongs
1048 bool wxTextCtrl::SetFont( const wxFont &font )
1049 {
1050     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1051
1052     if ( !wxTextCtrlBase::SetFont(font) )
1053     {
1054         // font didn't change, nothing to do
1055         return false;
1056     }
1057
1058     if ( m_windowStyle & wxTE_MULTILINE )
1059     {
1060         SetUpdateFont(true);
1061
1062         m_defaultStyle.SetFont(font);
1063
1064         ChangeFontGlobally();
1065     }
1066
1067     return true;
1068 }
1069
1070 void wxTextCtrl::ChangeFontGlobally()
1071 {
1072     // this method is very inefficient and hence should be called as rarely as
1073     // possible!
1074     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1075
1076                   wxT("shouldn't be called for single line controls") );
1077
1078     wxString value = GetValue();
1079     if ( !value.empty() )
1080     {
1081         SetUpdateFont(false);
1082
1083         Clear();
1084         AppendText(value);
1085     }
1086 }
1087
1088 void wxTextCtrl::UpdateFontIfNeeded()
1089 {
1090     if ( m_updateFont )
1091         ChangeFontGlobally();
1092 }
1093
1094 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1095 {
1096     if ( !wxControl::SetForegroundColour(colour) )
1097         return false;
1098
1099     // update default fg colour too
1100     m_defaultStyle.SetTextColour(colour);
1101
1102     return true;
1103 }
1104
1105 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1106 {
1107     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1108
1109     if ( !wxControl::SetBackgroundColour( colour ) )
1110         return false;
1111
1112     if (!m_widget->window)
1113         return false;
1114
1115     if (!m_backgroundColour.Ok())
1116         return false;
1117
1118     if (m_windowStyle & wxTE_MULTILINE)
1119     {
1120         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1121         if (!window)
1122             return false;
1123         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1124         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1125         gdk_window_clear( window );
1126     }
1127
1128     // change active background color too
1129     m_defaultStyle.SetBackgroundColour( colour );
1130
1131     return true;
1132 }
1133
1134 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1135 {
1136     if ( m_windowStyle & wxTE_MULTILINE )
1137     {
1138         if ( style.IsDefault() )
1139         {
1140             // nothing to do
1141             return true;
1142         }
1143
1144         // VERY dirty way to do that - removes the required text and re-adds it
1145         // with styling (FIXME)
1146
1147         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1148
1149         wxCHECK_MSG( start >= 0 && end <= l, false,
1150                      wxT("invalid range in wxTextCtrl::SetStyle") );
1151
1152         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1153         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1154         wxString tmp(text,*wxConvCurrent);
1155         g_free( text );
1156
1157         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1158         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1159
1160     #if wxUSE_UNICODE
1161         wxWX2MBbuf buf = tmp.mbc_str();
1162         const char *txt = buf;
1163         size_t txtlen = strlen(buf);
1164     #else
1165         const char *txt = tmp;
1166         size_t txtlen = tmp.length();
1167     #endif
1168
1169         // use the attributes from style which are set in it and fall back
1170         // first to the default style and then to the text control default
1171         // colours for the others
1172         wxGtkTextInsert(m_text,
1173                         wxTextAttr::Combine(style, m_defaultStyle, this),
1174                         txt,
1175                         txtlen);
1176
1177         /* does not seem to help under GTK+ 1.2 !!!
1178         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1179         SetInsertionPoint( old_pos );
1180
1181         return true;
1182     }
1183
1184     // else single line
1185     // cannot do this for GTK+'s Entry widget
1186     return false;
1187 }
1188
1189 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1190 {
1191     gtk_widget_modify_style(m_text, style);
1192 }
1193
1194 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1195 {
1196     Cut();
1197 }
1198
1199 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1200 {
1201     Copy();
1202 }
1203
1204 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1205 {
1206     Paste();
1207 }
1208
1209 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1210 {
1211     Undo();
1212 }
1213
1214 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1215 {
1216     Redo();
1217 }
1218
1219 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1220 {
1221     event.Enable( CanCut() );
1222 }
1223
1224 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1225 {
1226     event.Enable( CanCopy() );
1227 }
1228
1229 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1230 {
1231     event.Enable( CanPaste() );
1232 }
1233
1234 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1235 {
1236     event.Enable( CanUndo() );
1237 }
1238
1239 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1240 {
1241     event.Enable( CanRedo() );
1242 }
1243
1244 void wxTextCtrl::OnInternalIdle()
1245 {
1246     wxCursor cursor = m_cursor;
1247     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1248
1249     if (cursor.Ok())
1250     {
1251         GdkWindow *window = NULL;
1252         if (HasFlag(wxTE_MULTILINE))
1253             window = GTK_TEXT(m_text)->text_area;
1254         else
1255             window = GTK_ENTRY(m_text)->text_area;
1256
1257         if (window)
1258             gdk_window_set_cursor( window, cursor.GetCursor() );
1259
1260         if (!g_globalCursor.Ok())
1261             cursor = *wxSTANDARD_CURSOR;
1262
1263         window = m_widget->window;
1264         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1265             gdk_window_set_cursor( window, cursor.GetCursor() );
1266     }
1267
1268     if (g_delayedFocus == this)
1269     {
1270         if (GTK_WIDGET_REALIZED(m_widget))
1271         {
1272             gtk_widget_grab_focus( m_widget );
1273             g_delayedFocus = NULL;
1274         }
1275     }
1276
1277     if (wxUpdateUIEvent::CanUpdate(this))
1278         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1279 }
1280
1281 wxSize wxTextCtrl::DoGetBestSize() const
1282 {
1283     // FIXME should be different for multi-line controls...
1284     wxSize ret( wxControl::DoGetBestSize() );
1285     wxSize best(80, ret.y);
1286     CacheBestSize(best);
1287     return best;
1288 }
1289
1290 // ----------------------------------------------------------------------------
1291 // freeze/thaw
1292 // ----------------------------------------------------------------------------
1293
1294 void wxTextCtrl::DoFreeze()
1295 {
1296     if ( HasFlag(wxTE_MULTILINE) )
1297     {
1298         gtk_text_freeze(GTK_TEXT(m_text));
1299     }
1300 }
1301
1302 void wxTextCtrl::DoThaw()
1303 {
1304     if ( HasFlag(wxTE_MULTILINE) )
1305     {
1306         GTK_TEXT(m_text)->vadj->value = 0.0;
1307
1308         gtk_text_thaw(GTK_TEXT(m_text));
1309     }
1310 }
1311
1312 // ----------------------------------------------------------------------------
1313 // scrolling
1314 // ----------------------------------------------------------------------------
1315
1316 GtkAdjustment *wxTextCtrl::GetVAdj() const
1317 {
1318     if ( !IsMultiLine() )
1319         return NULL;
1320
1321     return GTK_TEXT(m_text)->vadj;
1322 }
1323
1324 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1325 {
1326     float value = adj->value + diff;
1327
1328     if ( value < 0 )
1329         value = 0;
1330
1331     float upper = adj->upper - adj->page_size;
1332     if ( value > upper )
1333         value = upper;
1334
1335     // did we noticeably change the scroll position?
1336     if ( fabs(adj->value - value) < 0.2 )
1337     {
1338         // well, this is what Robert does in wxScrollBar, so it must be good...
1339         return false;
1340     }
1341
1342     adj->value = value;
1343     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1344
1345     return true;
1346 }
1347
1348 bool wxTextCtrl::ScrollLines(int lines)
1349 {
1350     GtkAdjustment *adj = GetVAdj();
1351     if ( !adj )
1352         return false;
1353
1354     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1355     int diff = 10*lines;
1356
1357     return DoScroll(adj, diff);
1358 }
1359
1360 bool wxTextCtrl::ScrollPages(int pages)
1361 {
1362     GtkAdjustment *adj = GetVAdj();
1363     if ( !adj )
1364         return false;
1365
1366     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1367 }
1368
1369
1370 // static
1371 wxVisualAttributes
1372 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1373 {
1374     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1375 }