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