src/gtk1/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #include "wx/textctrl.h"
  13
  14 #ifndef WX_PRECOMP
  15     #include "wx/app.h"
  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 #include "wx/evtloop.h"
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <ctype.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     wxFont tmpFont;
  60     GdkFont *font;
  61     if (attr.HasFont())
  62     {
  63         tmpFont = attr.GetFont();
  64
  65         // FIXME: if this crashes because tmpFont goes out of scope and the GdkFont is
  66         // deleted, then we need to call gdk_font_ref on font.
  67         // This is because attr.GetFont() now returns a temporary font since wxTextAttr
  68         // no longer stores a wxFont object, for efficiency.
  69
  70         font = tmpFont.GetInternalFont();
  71     }
  72     else
  73         font  = NULL;
  74
  75     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  76                                            : NULL;
  77
  78     GdkColor *colBg = attr.HasBackgroundColour()
  79                         ? attr.GetBackgroundColour().GetColor()
  80                         : NULL;
  81
  82     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  83 }
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // "insert_text" for GtkEntry
  88 // ----------------------------------------------------------------------------
  89
  90 extern "C" {
  91 static void
  92 gtk_insert_text_callback(GtkEditable *editable,
  93                          const gchar *WXUNUSED(new_text),
  94                          gint WXUNUSED(new_text_length),
  95                          gint *WXUNUSED(position),
  96                          wxTextCtrl *win)
  97 {
  98     if (g_isIdle)
  99         wxapp_install_idle_handler();
 100
 101     // we should only be called if we have a max len limit at all
 102     GtkEntry *entry = GTK_ENTRY (editable);
 103
 104     wxCHECK_RET( entry->text_max_length, wxT("shouldn't be called") );
 105
 106     // check that we don't overflow the max length limit
 107     //
 108     // FIXME: this doesn't work when we paste a string which is going to be
 109     //        truncated
 110     if ( entry->text_length == entry->text_max_length )
 111     {
 112         // we don't need to run the base class version at all
 113         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
 114
 115         // remember that the next changed signal is to be ignored to avoid
 116         // generating a dummy wxEVT_TEXT event
 117         win->IgnoreNextTextUpdate();
 118
 119         // and generate the correct one ourselves
 120         wxCommandEvent event(wxEVT_TEXT_MAXLEN, win->GetId());
 121         event.SetEventObject(win);
 122         event.SetString(win->GetValue());
 123         win->HandleWindowEvent( event );
 124     }
 125 }
 126 }
 127
 128 //-----------------------------------------------------------------------------
 129 //  "changed"
 130 //-----------------------------------------------------------------------------
 131
 132 extern "C" {
 133 static void
 134 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 135 {
 136     if ( win->IgnoreTextUpdate() )
 137         return;
 138
 139     if (!win->m_hasVMT) return;
 140
 141     if (g_isIdle)
 142         wxapp_install_idle_handler();
 143
 144     win->SetModified();
 145     win->UpdateFontIfNeeded();
 146
 147     wxCommandEvent event( wxEVT_TEXT, win->GetId() );
 148     event.SetEventObject( win );
 149     win->HandleWindowEvent( event );
 150 }
 151 }
 152
 153 //-----------------------------------------------------------------------------
 154 // "changed" from vertical scrollbar
 155 //-----------------------------------------------------------------------------
 156
 157 extern "C" {
 158 static void
 159 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 160 {
 161     if (!win->m_hasVMT) return;
 162
 163     if (g_isIdle)
 164         wxapp_install_idle_handler();
 165
 166     win->CalculateScrollbar();
 167 }
 168 }
 169
 170 // ----------------------------------------------------------------------------
 171 // redraw callback for multiline text
 172 // ----------------------------------------------------------------------------
 173
 174 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 175 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 176 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 177 // don't do anything if we're inside wxYield()
 178
 179 extern "C" {
 180     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 181 }
 182
 183 static GtkDrawCallback gs_gtk_text_draw = NULL;
 184
 185 extern "C" {
 186 static void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 187 {
 188     wxEventLoopBase* loop = wxEventLoopBase::GetActive();
 189     if ( loop && !loop->IsYielding() )
 190     {
 191         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 192                      wxT("infinite recursion in wxgtk_text_draw aborted") );
 193
 194         gs_gtk_text_draw(widget, rect);
 195     }
 196 }
 197 }
 198
 199 //-----------------------------------------------------------------------------
 200 //  wxTextCtrl
 201 //-----------------------------------------------------------------------------
 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 = 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( NULL, 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::DoGetValue() 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 void wxTextCtrl::MarkDirty()
 717 {
 718     m_modified = true;
 719 }
 720
 721 void wxTextCtrl::DiscardEdits()
 722 {
 723     m_modified = false;
 724 }
 725
 726 // ----------------------------------------------------------------------------
 727 // max text length support
 728 // ----------------------------------------------------------------------------
 729
 730 void wxTextCtrl::IgnoreNextTextUpdate()
 731 {
 732     m_ignoreNextUpdate = true;
 733 }
 734
 735 bool wxTextCtrl::IgnoreTextUpdate()
 736 {
 737     if ( m_ignoreNextUpdate )
 738     {
 739         m_ignoreNextUpdate = false;
 740
 741         return true;
 742     }
 743
 744     return false;
 745 }
 746
 747 void wxTextCtrl::SetMaxLength(unsigned long len)
 748 {
 749     if ( !HasFlag(wxTE_MULTILINE) )
 750     {
 751         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 752
 753         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 754         // we had tried to enter more text than allowed by max text length and
 755         // the text wasn't really changed
 756         //
 757         // to detect this and generate TEXT_MAXLEN event instead of
 758         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 759         //
 760         // when max len is set to 0 we disconnect our handler as it means that
 761         // we shouldn't check anything any more
 762         if ( len )
 763         {
 764             gtk_signal_connect( GTK_OBJECT(m_text),
 765                                 "insert_text",
 766                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 767                                 (gpointer)this);
 768         }
 769         else // no checking
 770         {
 771             gtk_signal_disconnect_by_func
 772             (
 773                 GTK_OBJECT(m_text),
 774                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 775                 (gpointer)this
 776             );
 777         }
 778     }
 779 }
 780
 781 void wxTextCtrl::SetSelection( long from, long to )
 782 {
 783     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 784
 785     if (from == -1 && to == -1)
 786     {
 787         from = 0;
 788         to = GetValue().length();
 789     }
 790
 791     if ( (m_windowStyle & wxTE_MULTILINE) &&
 792          !GTK_TEXT(m_text)->line_start_cache )
 793     {
 794         // tell the programmer that it didn't work
 795         wxLogDebug(wxT("Can't call SetSelection() before realizing the control"));
 796         return;
 797     }
 798
 799     if (m_windowStyle & wxTE_MULTILINE)
 800     {
 801         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 802     }
 803     else
 804     {
 805         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 806     }
 807 }
 808
 809 void wxTextCtrl::ShowPosition( long pos )
 810 {
 811     if (m_windowStyle & wxTE_MULTILINE)
 812     {
 813         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 814         float totalLines =  (float) GetNumberOfLines();
 815         long posX;
 816         long posY;
 817         PositionToXY(pos, &posX, &posY);
 818         float posLine = (float) posY;
 819         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 820         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 821     }
 822 }
 823
 824 long wxTextCtrl::GetInsertionPoint() const
 825 {
 826     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 827     return (long) GET_EDITABLE_POS(m_text);
 828 }
 829
 830 wxTextPos wxTextCtrl::GetLastPosition() const
 831 {
 832     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 833
 834     int pos = 0;
 835
 836     if (m_windowStyle & wxTE_MULTILINE)
 837     {
 838         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 839     }
 840     else
 841     {
 842         pos = GTK_ENTRY(m_text)->text_length;
 843     }
 844
 845     return (long)pos;
 846 }
 847
 848 void wxTextCtrl::Remove( long from, long to )
 849 {
 850     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 851     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 852 }
 853
 854 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 855 {
 856     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 857
 858     Remove( from, to );
 859
 860     if (!value.empty())
 861     {
 862         gint pos = (gint)from;
 863 #if wxUSE_UNICODE
 864         wxWX2MBbuf buf = value.mbc_str();
 865         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 866 #else
 867         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.length(), &pos );
 868 #endif // wxUSE_UNICODE
 869     }
 870 }
 871
 872 void wxTextCtrl::Cut()
 873 {
 874     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 875     gtk_editable_cut_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 876 }
 877
 878 void wxTextCtrl::Copy()
 879 {
 880     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 881     gtk_editable_copy_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 882 }
 883
 884 void wxTextCtrl::Paste()
 885 {
 886     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 887     gtk_editable_paste_clipboard(GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG);
 888 }
 889
 890 // Undo/redo
 891 void wxTextCtrl::Undo()
 892 {
 893     // TODO
 894     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 895 }
 896
 897 void wxTextCtrl::Redo()
 898 {
 899     // TODO
 900     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 901 }
 902
 903 bool wxTextCtrl::CanUndo() const
 904 {
 905     // TODO
 906     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 907     return false;
 908 }
 909
 910 bool wxTextCtrl::CanRedo() const
 911 {
 912     // TODO
 913     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 914     return false;
 915 }
 916
 917 // If the return values from and to are the same, there is no
 918 // selection.
 919 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 920 {
 921     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 922
 923     gint from = -1;
 924     gint to = -1;
 925     bool haveSelection = false;
 926
 927      if ( (GTK_EDITABLE(m_text)->has_selection) )
 928      {
 929          haveSelection = true;
 930          from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 931          to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 932      }
 933
 934      if (! haveSelection )
 935           from = to = GetInsertionPoint();
 936
 937      if ( from > to )
 938      {
 939          // exchange them to be compatible with wxMSW
 940          gint tmp = from;
 941          from = to;
 942          to = tmp;
 943      }
 944
 945     if ( fromOut )
 946         *fromOut = from;
 947     if ( toOut )
 948         *toOut = to;
 949 }
 950
 951
 952 bool wxTextCtrl::IsEditable() const
 953 {
 954     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
 955     return GTK_EDITABLE(m_text)->editable;
 956 }
 957
 958 bool wxTextCtrl::IsModified() const
 959 {
 960     return m_modified;
 961 }
 962
 963 void wxTextCtrl::Clear()
 964 {
 965     SetValue( wxEmptyString );
 966 }
 967
 968 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
 969 {
 970     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 971
 972     if ((key_event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 973     {
 974         wxCommandEvent event(wxEVT_TEXT_ENTER, m_windowId);
 975         event.SetEventObject(this);
 976         event.SetString(GetValue());
 977         if (HandleWindowEvent(event)) return;
 978     }
 979
 980     if ((key_event.GetKeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
 981     {
 982         // This will invoke the dialog default action, such
 983         // as the clicking the default button.
 984
 985         wxWindow *top_frame = m_parent;
 986         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 987             top_frame = top_frame->GetParent();
 988
 989         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
 990         {
 991             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 992
 993             if (window->default_widget)
 994             {
 995                 gtk_widget_activate (window->default_widget);
 996                 return;
 997             }
 998         }
 999     }
1000
1001     key_event.Skip();
1002 }
1003
1004 GtkWidget* wxTextCtrl::GetConnectWidget()
1005 {
1006     return GTK_WIDGET(m_text);
1007 }
1008
1009 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1010 {
1011     if (m_windowStyle & wxTE_MULTILINE)
1012     {
1013         return (window == GTK_TEXT(m_text)->text_area);
1014     }
1015     else
1016     {
1017         return (window == GTK_ENTRY(m_text)->text_area);
1018     }
1019 }
1020
1021 // the font will change for subsequent text insertiongs
1022 bool wxTextCtrl::SetFont( const wxFont &font )
1023 {
1024     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1025
1026     if ( !wxTextCtrlBase::SetFont(font) )
1027     {
1028         // font didn't change, nothing to do
1029         return false;
1030     }
1031
1032     if ( m_windowStyle & wxTE_MULTILINE )
1033     {
1034         SetUpdateFont(true);
1035
1036         m_defaultStyle.SetFont(font);
1037
1038         ChangeFontGlobally();
1039     }
1040
1041     return true;
1042 }
1043
1044 void wxTextCtrl::ChangeFontGlobally()
1045 {
1046     // this method is very inefficient and hence should be called as rarely as
1047     // possible!
1048     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1049
1050                   wxT("shouldn't be called for single line controls") );
1051
1052     wxString value = GetValue();
1053     if ( !value.empty() )
1054     {
1055         SetUpdateFont(false);
1056
1057         Clear();
1058         AppendText(value);
1059     }
1060 }
1061
1062 void wxTextCtrl::UpdateFontIfNeeded()
1063 {
1064     if ( m_updateFont )
1065         ChangeFontGlobally();
1066 }
1067
1068 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1069 {
1070     if ( !wxControl::SetForegroundColour(colour) )
1071         return false;
1072
1073     // update default fg colour too
1074     m_defaultStyle.SetTextColour(colour);
1075
1076     return true;
1077 }
1078
1079 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1080 {
1081     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1082
1083     if ( !wxControl::SetBackgroundColour( colour ) )
1084         return false;
1085
1086     if (!m_widget->window)
1087         return false;
1088
1089     if (!m_backgroundColour.IsOk())
1090         return false;
1091
1092     if (m_windowStyle & wxTE_MULTILINE)
1093     {
1094         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1095         if (!window)
1096             return false;
1097         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1098         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1099         gdk_window_clear( window );
1100     }
1101
1102     // change active background color too
1103     m_defaultStyle.SetBackgroundColour( colour );
1104
1105     return true;
1106 }
1107
1108 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1109 {
1110     if ( m_windowStyle & wxTE_MULTILINE )
1111     {
1112         if ( style.IsDefault() )
1113         {
1114             // nothing to do
1115             return true;
1116         }
1117
1118         // VERY dirty way to do that - removes the required text and re-adds it
1119         // with styling (FIXME)
1120
1121         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1122
1123         wxCHECK_MSG( start >= 0 && end <= l, false,
1124                      wxT("invalid range in wxTextCtrl::SetStyle") );
1125
1126         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1127         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1128         wxString tmp(text,*wxConvCurrent);
1129         g_free( text );
1130
1131         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1132         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1133
1134     #if wxUSE_UNICODE
1135         wxWX2MBbuf buf = tmp.mbc_str();
1136         const char *txt = buf;
1137         size_t txtlen = strlen(buf);
1138     #else
1139         const char *txt = tmp;
1140         size_t txtlen = tmp.length();
1141     #endif
1142
1143         // use the attributes from style which are set in it and fall back
1144         // first to the default style and then to the text control default
1145         // colours for the others
1146         wxGtkTextInsert(m_text,
1147                         wxTextAttr::Combine(style, m_defaultStyle, this),
1148                         txt,
1149                         txtlen);
1150
1151         /* does not seem to help under GTK+ 1.2 !!!
1152         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1153         SetInsertionPoint( old_pos );
1154
1155         return true;
1156     }
1157
1158     // else single line
1159     // cannot do this for GTK+'s Entry widget
1160     return false;
1161 }
1162
1163 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1164 {
1165     gtk_widget_modify_style(m_text, style);
1166 }
1167
1168 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1169 {
1170     Cut();
1171 }
1172
1173 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1174 {
1175     Copy();
1176 }
1177
1178 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1179 {
1180     Paste();
1181 }
1182
1183 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1184 {
1185     Undo();
1186 }
1187
1188 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1189 {
1190     Redo();
1191 }
1192
1193 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1194 {
1195     event.Enable( CanCut() );
1196 }
1197
1198 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1199 {
1200     event.Enable( CanCopy() );
1201 }
1202
1203 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1204 {
1205     event.Enable( CanPaste() );
1206 }
1207
1208 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1209 {
1210     event.Enable( CanUndo() );
1211 }
1212
1213 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1214 {
1215     event.Enable( CanRedo() );
1216 }
1217
1218 void wxTextCtrl::OnInternalIdle()
1219 {
1220     wxCursor cursor = m_cursor;
1221     if (g_globalCursor.IsOk()) cursor = g_globalCursor;
1222
1223     if (cursor.IsOk())
1224     {
1225         GdkWindow *window = NULL;
1226         if (HasFlag(wxTE_MULTILINE))
1227             window = GTK_TEXT(m_text)->text_area;
1228         else
1229             window = GTK_ENTRY(m_text)->text_area;
1230
1231         if (window)
1232             gdk_window_set_cursor( window, cursor.GetCursor() );
1233
1234         if (!g_globalCursor.IsOk())
1235             cursor = *wxSTANDARD_CURSOR;
1236
1237         window = m_widget->window;
1238         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1239             gdk_window_set_cursor( window, cursor.GetCursor() );
1240     }
1241
1242     if (g_delayedFocus == this)
1243     {
1244         if (GTK_WIDGET_REALIZED(m_widget))
1245         {
1246             gtk_widget_grab_focus( m_widget );
1247             g_delayedFocus = NULL;
1248         }
1249     }
1250
1251     if (wxUpdateUIEvent::CanUpdate(this))
1252         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
1253 }
1254
1255 wxSize wxTextCtrl::DoGetBestSize() const
1256 {
1257     // FIXME should be different for multi-line controls...
1258     wxSize ret( wxControl::DoGetBestSize() );
1259     wxSize best(80, ret.y);
1260     CacheBestSize(best);
1261     return best;
1262 }
1263
1264 // ----------------------------------------------------------------------------
1265 // freeze/thaw
1266 // ----------------------------------------------------------------------------
1267
1268 void wxTextCtrl::DoFreeze()
1269 {
1270     if ( HasFlag(wxTE_MULTILINE) )
1271     {
1272         gtk_text_freeze(GTK_TEXT(m_text));
1273     }
1274 }
1275
1276 void wxTextCtrl::DoThaw()
1277 {
1278     if ( HasFlag(wxTE_MULTILINE) )
1279     {
1280         GTK_TEXT(m_text)->vadj->value = 0.0;
1281
1282         gtk_text_thaw(GTK_TEXT(m_text));
1283     }
1284 }
1285
1286 // ----------------------------------------------------------------------------
1287 // scrolling
1288 // ----------------------------------------------------------------------------
1289
1290 GtkAdjustment *wxTextCtrl::GetVAdj() const
1291 {
1292     if ( !IsMultiLine() )
1293         return NULL;
1294
1295     return GTK_TEXT(m_text)->vadj;
1296 }
1297
1298 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1299 {
1300     float value = adj->value + diff;
1301
1302     if ( value < 0 )
1303         value = 0;
1304
1305     float upper = adj->upper - adj->page_size;
1306     if ( value > upper )
1307         value = upper;
1308
1309     // did we noticeably change the scroll position?
1310     if ( fabs(adj->value - value) < 0.2 )
1311     {
1312         // well, this is what Robert does in wxScrollBar, so it must be good...
1313         return false;
1314     }
1315
1316     adj->value = value;
1317     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1318
1319     return true;
1320 }
1321
1322 bool wxTextCtrl::ScrollLines(int lines)
1323 {
1324     GtkAdjustment *adj = GetVAdj();
1325     if ( !adj )
1326         return false;
1327
1328     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1329     int diff = 10*lines;
1330
1331     return DoScroll(adj, diff);
1332 }
1333
1334 bool wxTextCtrl::ScrollPages(int pages)
1335 {
1336     GtkAdjustment *adj = GetVAdj();
1337     if ( !adj )
1338         return false;
1339
1340     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1341 }
1342
1343
1344 // static
1345 wxVisualAttributes
1346 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1347 {
1348     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1349 }