src/gtk/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "textctrl.h"
  12 #endif
  13
  14 #include "wx/textctrl.h"
  15 #include "wx/utils.h"
  16 #include "wx/intl.h"
  17 #include "wx/log.h"
  18 #include "wx/settings.h"
  19 #include "wx/panel.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <ctype.h>
  24 #include <math.h>               // for fabs
  25
  26 // TODO: reimplement wxTextCtrl using GtkTextView
  27 #ifdef __WXGTK20__
  28     #define GTK_ENABLE_BROKEN       // need this to get GtkText at all
  29 #endif // __WXGTK20__
  30
  31 #include "wx/gtk/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 //-----------------------------------------------------------------------------
  35 // idle system
  36 //-----------------------------------------------------------------------------
  37
  38 extern void wxapp_install_idle_handler();
  39 extern bool g_isIdle;
  40
  41 //-----------------------------------------------------------------------------
  42 // data
  43 //-----------------------------------------------------------------------------
  44
  45 extern bool       g_blockEventsOnDrag;
  46 extern wxCursor   g_globalCursor;
  47 extern wxWindowGTK *g_delayedFocus;
  48
  49 // ----------------------------------------------------------------------------
  50 // helpers
  51 // ----------------------------------------------------------------------------
  52
  53 static void wxGtkTextInsert(GtkWidget *text,
  54                             const wxTextAttr& attr,
  55                             const char *txt,
  56                             size_t len)
  57 {
  58     GdkFont *font = attr.HasFont() ? attr.GetFont().GetInternalFont()
  59                                    : NULL;
  60
  61     GdkColor *colFg = attr.HasTextColour() ? attr.GetTextColour().GetColor()
  62                                            : NULL;
  63
  64     GdkColor *colBg = attr.HasBackgroundColour()
  65                         ? attr.GetBackgroundColour().GetColor()
  66                         : NULL;
  67
  68     gtk_text_insert( GTK_TEXT(text), font, colFg, colBg, txt, len );
  69 }
  70
  71 // ----------------------------------------------------------------------------
  72 // "insert_text" for GtkEntry
  73 // ----------------------------------------------------------------------------
  74
  75 static void
  76 gtk_insert_text_callback(GtkEditable *editable,
  77                          const gchar *new_text,
  78                          gint new_text_length,
  79                          gint *position,
  80                          wxTextCtrl *win)
  81 {
  82     if (g_isIdle)
  83         wxapp_install_idle_handler();
  84
  85     // we should only be called if we have a max len limit at all
  86     GtkEntry *entry = GTK_ENTRY (editable);
  87
  88     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  89
  90     // check that we don't overflow the max length limit
  91     //
  92     // FIXME: this doesn't work when we paste a string which is going to be
  93     //        truncated
  94     if ( entry->text_length == entry->text_max_length )
  95     {
  96         // we don't need to run the base class version at all
  97         gtk_signal_emit_stop_by_name(GTK_OBJECT(editable), "insert_text");
  98
  99         // remember that the next changed signal is to be ignored to avoid
 100         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 101         win->IgnoreNextTextUpdate();
 102
 103         // and generate the correct one ourselves
 104         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 105         event.SetEventObject(win);
 106         event.SetString(win->GetValue());
 107         win->GetEventHandler()->ProcessEvent( event );
 108     }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 //  "changed"
 113 //-----------------------------------------------------------------------------
 114
 115 static void
 116 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 117 {
 118     if ( win->IgnoreTextUpdate() )
 119         return;
 120
 121     if (!win->m_hasVMT) return;
 122
 123     if (g_isIdle)
 124         wxapp_install_idle_handler();
 125
 126     win->SetModified();
 127     win->UpdateFontIfNeeded();
 128
 129     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
 130     event.SetEventObject( win );
 131     event.SetString( win->GetValue() );
 132     win->GetEventHandler()->ProcessEvent( event );
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136 // "changed" from vertical scrollbar
 137 //-----------------------------------------------------------------------------
 138
 139 static void
 140 gtk_scrollbar_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 141 {
 142     if (!win->m_hasVMT) return;
 143
 144     if (g_isIdle)
 145         wxapp_install_idle_handler();
 146
 147     win->CalculateScrollbar();
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // redraw callback for multiline text
 152 // ----------------------------------------------------------------------------
 153
 154 #ifndef __WXGTK20__
 155
 156 // redrawing a GtkText from inside a wxYield() call results in crashes (the
 157 // text sample shows it in its "Add lines" command which shows wxProgressDialog
 158 // which implicitly calls wxYield()) so we override GtkText::draw() and simply
 159 // don't do anything if we're inside wxYield()
 160
 161 extern bool wxIsInsideYield;
 162
 163 extern "C" {
 164     typedef void (*GtkDrawCallback)(GtkWidget *widget, GdkRectangle *rect);
 165 }
 166
 167 static GtkDrawCallback gs_gtk_text_draw = NULL;
 168
 169 extern "C"
 170 void wxgtk_text_draw( GtkWidget *widget, GdkRectangle *rect)
 171 {
 172     if ( !wxIsInsideYield )
 173     {
 174         wxCHECK_RET( gs_gtk_text_draw != wxgtk_text_draw,
 175                      _T("infinite recursion in wxgtk_text_draw aborted") );
 176
 177         gs_gtk_text_draw(widget, rect);
 178     }
 179 }
 180
 181 #endif // __WXGTK20__
 182
 183 //-----------------------------------------------------------------------------
 184 //  wxTextCtrl
 185 //-----------------------------------------------------------------------------
 186
 187 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl,wxControl)
 188
 189 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 190     EVT_CHAR(wxTextCtrl::OnChar)
 191
 192     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 193     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 194     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 195     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 196     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 197
 198     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 199     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 200     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 201     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 202     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 203 END_EVENT_TABLE()
 204
 205 void wxTextCtrl::Init()
 206 {
 207     m_ignoreNextUpdate =
 208     m_modified = FALSE;
 209     m_updateFont = FALSE;
 210     m_text =
 211     m_vScrollbar = (GtkWidget *)NULL;
 212 }
 213
 214 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 215                         wxWindowID id,
 216                         const wxString &value,
 217                         const wxPoint &pos,
 218                         const wxSize &size,
 219                         long style,
 220                         const wxValidator& validator,
 221                         const wxString &name )
 222 {
 223     Init();
 224
 225     Create( parent, id, value, pos, size, style, validator, name );
 226 }
 227
 228 bool wxTextCtrl::Create( wxWindow *parent,
 229                          wxWindowID id,
 230                          const wxString &value,
 231                          const wxPoint &pos,
 232                          const wxSize &size,
 233                          long style,
 234                          const wxValidator& validator,
 235                          const wxString &name )
 236 {
 237     m_needParent = TRUE;
 238     m_acceptsFocus = TRUE;
 239
 240     if (!PreCreation( parent, pos, size ) ||
 241         !CreateBase( parent, id, pos, size, style, validator, name ))
 242     {
 243         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 244         return FALSE;
 245     }
 246
 247
 248     m_vScrollbarVisible = FALSE;
 249
 250     bool multi_line = (style & wxTE_MULTILINE) != 0;
 251     if (multi_line)
 252     {
 253 #ifdef __WXGTK13__
 254         /* a multi-line edit control: create a vertical scrollbar by default and
 255            horizontal if requested */
 256         bool bHasHScrollbar = (style & wxHSCROLL) != 0;
 257 #else
 258         bool bHasHScrollbar = FALSE;
 259 #endif
 260
 261         /* create our control ... */
 262         m_text = gtk_text_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
 263
 264         /* ... and put into the upper left hand corner of the table */
 265         m_widget = gtk_table_new(bHasHScrollbar ? 2 : 1, 2, FALSE);
 266         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 267         gtk_table_attach( GTK_TABLE(m_widget), m_text, 0, 1, 0, 1,
 268                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 269                       (GtkAttachOptions)(GTK_FILL | GTK_EXPAND | GTK_SHRINK),
 270                        0, 0);
 271
 272         /* always wrap words */
 273         gtk_text_set_word_wrap( GTK_TEXT(m_text), TRUE );
 274
 275 #ifdef __WXGTK13__
 276         /* put the horizontal scrollbar in the lower left hand corner */
 277         if (bHasHScrollbar)
 278         {
 279             GtkWidget *hscrollbar = gtk_hscrollbar_new(GTK_TEXT(m_text)->hadj);
 280             GTK_WIDGET_UNSET_FLAGS( hscrollbar, GTK_CAN_FOCUS );
 281             gtk_table_attach(GTK_TABLE(m_widget), hscrollbar, 0, 1, 1, 2,
 282                        (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 283                        GTK_FILL,
 284                        0, 0);
 285             gtk_widget_show(hscrollbar);
 286
 287             /* don't wrap lines, otherwise we wouldn't need the scrollbar */
 288             gtk_text_set_line_wrap( GTK_TEXT(m_text), FALSE );
 289         }
 290 #endif
 291
 292         /* finally, put the vertical scrollbar in the upper right corner */
 293         m_vScrollbar = gtk_vscrollbar_new( GTK_TEXT(m_text)->vadj );
 294         GTK_WIDGET_UNSET_FLAGS( m_vScrollbar, GTK_CAN_FOCUS );
 295         gtk_table_attach(GTK_TABLE(m_widget), m_vScrollbar, 1, 2, 0, 1,
 296                      GTK_FILL,
 297                      (GtkAttachOptions)(GTK_EXPAND | GTK_FILL | GTK_SHRINK),
 298                      0, 0);
 299     }
 300     else
 301     {
 302         /* a single-line text control: no need for scrollbars */
 303         m_widget =
 304         m_text = gtk_entry_new();
 305     }
 306
 307     m_parent->DoAddChild( this );
 308
 309     m_focusWidget = m_text;
 310
 311     PostCreation();
 312
 313     SetFont( parent->GetFont() );
 314
 315     wxSize size_best( DoGetBestSize() );
 316     wxSize new_size( size );
 317     if (new_size.x == -1)
 318         new_size.x = size_best.x;
 319     if (new_size.y == -1)
 320         new_size.y = size_best.y;
 321     if ((new_size.x != size.x) || (new_size.y != size.y))
 322         SetSize( new_size.x, new_size.y );
 323
 324     if (multi_line)
 325         gtk_widget_show(m_text);
 326
 327     if (multi_line)
 328     {
 329         gtk_signal_connect(GTK_OBJECT(GTK_TEXT(m_text)->vadj), "changed",
 330           (GtkSignalFunc) gtk_scrollbar_changed_callback, (gpointer) this );
 331
 332 #ifndef __WXGTK20__
 333         // only initialize gs_gtk_text_draw once, starting from the next the
 334         // klass::draw will already be wxgtk_text_draw
 335         if ( !gs_gtk_text_draw )
 336         {
 337             GtkDrawCallback&
 338                 draw = GTK_WIDGET_CLASS(GTK_OBJECT(m_text)->klass)->draw;
 339
 340             gs_gtk_text_draw = draw;
 341
 342             draw = wxgtk_text_draw;
 343         }
 344 #endif // GTK+ 1.x
 345     }
 346
 347     if (!value.IsEmpty())
 348     {
 349         gint tmp = 0;
 350
 351 #if !GTK_CHECK_VERSION(1, 2, 0)
 352         // if we don't realize it, GTK 1.0.6 dies with a SIGSEGV in
 353         // gtk_editable_insert_text()
 354         gtk_widget_realize(m_text);
 355 #endif // GTK 1.0
 356
 357 #if wxUSE_UNICODE
 358         wxWX2MBbuf val = value.mbc_str();
 359         gtk_editable_insert_text( GTK_EDITABLE(m_text), val, strlen(val), &tmp );
 360 #else // !Unicode
 361         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
 362 #endif // Unicode/!Unicode
 363
 364         if (multi_line)
 365         {
 366             /* bring editable's cursor uptodate. bug in GTK. */
 367             SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 368         }
 369     }
 370
 371     if (style & wxTE_PASSWORD)
 372     {
 373         if (!multi_line)
 374             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 375     }
 376
 377     if (style & wxTE_READONLY)
 378     {
 379         if (!multi_line)
 380             gtk_entry_set_editable( GTK_ENTRY(m_text), FALSE );
 381     }
 382     else
 383     {
 384         if (multi_line)
 385             gtk_text_set_editable( GTK_TEXT(m_text), 1 );
 386     }
 387
 388     /* we want to be notified about text changes */
 389     gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 390       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 391
 392     /* we don't set a valid background colour, because the window
 393        manager should use a default one */
 394     m_backgroundColour = wxColour();
 395
 396     wxColour colFg = parent->GetForegroundColour();
 397     SetForegroundColour( colFg );
 398
 399     m_cursor = wxCursor( wxCURSOR_IBEAM );
 400
 401     wxTextAttr attrDef( colFg, m_backgroundColour, parent->GetFont() );
 402     SetDefaultStyle( attrDef );
 403
 404     Show( TRUE );
 405
 406     return TRUE;
 407 }
 408
 409 void wxTextCtrl::CalculateScrollbar()
 410 {
 411     if ((m_windowStyle & wxTE_MULTILINE) == 0) return;
 412
 413     GtkAdjustment *adj = GTK_TEXT(m_text)->vadj;
 414
 415     if (adj->upper - adj->page_size < 0.8)
 416     {
 417         if (m_vScrollbarVisible)
 418         {
 419             gtk_widget_hide( m_vScrollbar );
 420             m_vScrollbarVisible = FALSE;
 421         }
 422     }
 423     else
 424     {
 425         if (!m_vScrollbarVisible)
 426         {
 427             gtk_widget_show( m_vScrollbar );
 428             m_vScrollbarVisible = TRUE;
 429         }
 430     }
 431 }
 432
 433 wxString wxTextCtrl::GetValue() const
 434 {
 435     wxCHECK_MSG( m_text != NULL, wxT(""), wxT("invalid text ctrl") );
 436
 437     wxString tmp;
 438     if (m_windowStyle & wxTE_MULTILINE)
 439     {
 440         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 441         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 442         tmp = wxString(text,*wxConvCurrent);
 443         g_free( text );
 444     }
 445     else
 446     {
 447         tmp = wxString(gtk_entry_get_text( GTK_ENTRY(m_text) ),*wxConvCurrent);
 448     }
 449     return tmp;
 450 }
 451
 452 void wxTextCtrl::SetValue( const wxString &value )
 453 {
 454     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 455
 456     if (m_windowStyle & wxTE_MULTILINE)
 457     {
 458         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 459         gtk_editable_delete_text( GTK_EDITABLE(m_text), 0, len );
 460         len = 0;
 461 #if wxUSE_UNICODE
 462         wxWX2MBbuf tmpbuf = value.mbc_str();
 463         gtk_editable_insert_text( GTK_EDITABLE(m_text), tmpbuf, strlen(tmpbuf), &len );
 464 #else
 465         gtk_editable_insert_text( GTK_EDITABLE(m_text), value.mbc_str(), value.Length(), &len );
 466 #endif
 467     }
 468     else
 469     {
 470         gtk_entry_set_text( GTK_ENTRY(m_text), value.mbc_str() );
 471     }
 472
 473     // GRG, Jun/2000: Changed this after a lot of discussion in
 474     //   the lists. wxWindows 2.2 will have a set of flags to
 475     //   customize this behaviour.
 476     SetInsertionPoint(0);
 477
 478     m_modified = FALSE;
 479 }
 480
 481 void wxTextCtrl::WriteText( const wxString &text )
 482 {
 483     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 484
 485     if ( text.empty() )
 486         return;
 487
 488 #if wxUSE_UNICODE
 489     wxWX2MBbuf buf = text.mbc_str();
 490     const char *txt = buf;
 491     size_t txtlen = strlen(buf);
 492 #else
 493     const char *txt = text;
 494     size_t txtlen = text.length();
 495 #endif
 496
 497     if ( m_windowStyle & wxTE_MULTILINE )
 498     {
 499         // After cursor movements, gtk_text_get_point() is wrong by one.
 500         gtk_text_set_point( GTK_TEXT(m_text), GET_EDITABLE_POS(m_text) );
 501
 502         // always use m_defaultStyle, even if it is empty as otherwise
 503         // resetting the style and appending some more text wouldn't work: if
 504         // we don't specify the style explicitly, the old style would be used
 505         wxGtkTextInsert(m_text, m_defaultStyle, txt, txtlen);
 506
 507         // Bring editable's cursor back uptodate.
 508         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 509     }
 510     else // single line
 511     {
 512         // This moves the cursor pos to behind the inserted text.
 513         gint len = GET_EDITABLE_POS(m_text);
 514         gtk_editable_insert_text( GTK_EDITABLE(m_text), txt, txtlen, &len );
 515
 516         // Bring editable's cursor uptodate.
 517         len += text.Len();
 518
 519         // Bring entry's cursor uptodate.
 520         gtk_entry_set_position( GTK_ENTRY(m_text), len );
 521     }
 522
 523     m_modified = TRUE;
 524 }
 525
 526 void wxTextCtrl::AppendText( const wxString &text )
 527 {
 528     SetInsertionPointEnd();
 529     WriteText( text );
 530 }
 531
 532 wxString wxTextCtrl::GetLineText( long lineNo ) const
 533 {
 534     if (m_windowStyle & wxTE_MULTILINE)
 535     {
 536         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 537         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 538
 539         if (text)
 540         {
 541             wxString buf(wxT(""));
 542             long i;
 543             int currentLine = 0;
 544             for (i = 0; currentLine != lineNo && text[i]; i++ )
 545                 if (text[i] == '\n')
 546             currentLine++;
 547             // Now get the text
 548             int j;
 549             for (j = 0; text[i] && text[i] != '\n'; i++, j++ )
 550                 buf += text[i];
 551
 552             g_free( text );
 553             return buf;
 554         }
 555         else
 556         {
 557             return wxEmptyString;
 558         }
 559     }
 560     else
 561     {
 562         if (lineNo == 0) return GetValue();
 563         return wxEmptyString;
 564     }
 565 }
 566
 567 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
 568 {
 569   /* If you implement this, don't forget to update the documentation!
 570    * (file docs/latex/wx/text.tex) */
 571     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
 572 }
 573
 574 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
 575 {
 576     if ( m_windowStyle & wxTE_MULTILINE )
 577     {
 578         wxString text = GetValue();
 579
 580         // cast to prevent warning. But pos really should've been unsigned.
 581         if( (unsigned long)pos > text.Len()  )
 582             return FALSE;
 583
 584         *x=0;   // First Col
 585         *y=0;   // First Line
 586
 587         const wxChar* stop = text.c_str() + pos;
 588         for ( const wxChar *p = text.c_str(); p < stop; p++ )
 589         {
 590             if (*p == wxT('\n'))
 591             {
 592                 (*y)++;
 593                 *x=0;
 594             }
 595             else
 596                 (*x)++;
 597         }
 598     }
 599     else // single line control
 600     {
 601         if ( pos <= GTK_ENTRY(m_text)->text_length )
 602         {
 603             *y = 0;
 604             *x = pos;
 605         }
 606         else
 607         {
 608             // index out of bounds
 609             return FALSE;
 610         }
 611     }
 612
 613     return TRUE;
 614 }
 615
 616 long wxTextCtrl::XYToPosition(long x, long y ) const
 617 {
 618     if (!(m_windowStyle & wxTE_MULTILINE)) return 0;
 619
 620     long pos=0;
 621     for( int i=0; i<y; i++ ) pos += GetLineLength(i) + 1; // one for '\n'
 622
 623     pos += x;
 624     return pos;
 625 }
 626
 627 int wxTextCtrl::GetLineLength(long lineNo) const
 628 {
 629     wxString str = GetLineText (lineNo);
 630     return (int) str.Length();
 631 }
 632
 633 int wxTextCtrl::GetNumberOfLines() const
 634 {
 635     if (m_windowStyle & wxTE_MULTILINE)
 636     {
 637         gint len = gtk_text_get_length( GTK_TEXT(m_text) );
 638         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), 0, len );
 639
 640         if (text)
 641         {
 642             int currentLine = 0;
 643             for (int i = 0; i < len; i++ )
 644             {
 645                 if (text[i] == '\n')
 646                     currentLine++;
 647             }
 648             g_free( text );
 649
 650             // currentLine is 0 based, add 1 to get number of lines
 651             return currentLine + 1;
 652         }
 653         else
 654         {
 655             return 0;
 656         }
 657     }
 658     else
 659     {
 660         return 1;
 661     }
 662 }
 663
 664 void wxTextCtrl::SetInsertionPoint( long pos )
 665 {
 666     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 667
 668     if (m_windowStyle & wxTE_MULTILINE)
 669     {
 670         /* seems to be broken in GTK 1.0.X:
 671            gtk_text_set_point( GTK_TEXT(m_text), (int)pos ); */
 672
 673         gtk_signal_disconnect_by_func( GTK_OBJECT(m_text),
 674           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 675
 676         /* we fake a set_point by inserting and deleting. as the user
 677            isn't supposed to get to know about thos non-sense, we
 678            disconnect so that no events are sent to the user program. */
 679
 680         gint tmp = (gint)pos;
 681         gtk_editable_insert_text( GTK_EDITABLE(m_text), " ", 1, &tmp );
 682         gtk_editable_delete_text( GTK_EDITABLE(m_text), tmp-1, tmp );
 683
 684         gtk_signal_connect( GTK_OBJECT(m_text), "changed",
 685           GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 686
 687         /* bring editable's cursor uptodate. another bug in GTK. */
 688
 689         SET_EDITABLE_POS(m_text, gtk_text_get_point( GTK_TEXT(m_text) ));
 690     }
 691     else
 692     {
 693         gtk_entry_set_position( GTK_ENTRY(m_text), (int)pos );
 694
 695         /* bring editable's cursor uptodate. bug in GTK. */
 696
 697         SET_EDITABLE_POS(m_text, (guint32)pos);
 698     }
 699 }
 700
 701 void wxTextCtrl::SetInsertionPointEnd()
 702 {
 703     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 704
 705     if (m_windowStyle & wxTE_MULTILINE)
 706         SetInsertionPoint(gtk_text_get_length(GTK_TEXT(m_text)));
 707     else
 708         gtk_entry_set_position( GTK_ENTRY(m_text), -1 );
 709 }
 710
 711 void wxTextCtrl::SetEditable( bool editable )
 712 {
 713     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 714
 715     if (m_windowStyle & wxTE_MULTILINE)
 716         gtk_text_set_editable( GTK_TEXT(m_text), editable );
 717     else
 718         gtk_entry_set_editable( GTK_ENTRY(m_text), editable );
 719 }
 720
 721 bool wxTextCtrl::Enable( bool enable )
 722 {
 723     if (!wxWindowBase::Enable(enable))
 724     {
 725         // nothing to do
 726         return FALSE;
 727     }
 728
 729     if (m_windowStyle & wxTE_MULTILINE)
 730     {
 731         gtk_text_set_editable( GTK_TEXT(m_text), enable );
 732         OnParentEnable(enable);
 733     }
 734     else
 735     {
 736         gtk_widget_set_sensitive( m_text, enable );
 737     }
 738
 739     return TRUE;
 740 }
 741
 742 // wxGTK-specific: called recursively by Enable,
 743 // to give widgets an oppprtunity to correct their colours after they
 744 // have been changed by Enable
 745 void wxTextCtrl::OnParentEnable( bool enable )
 746 {
 747     // If we have a custom background colour, we use this colour in both
 748     // disabled and enabled mode, or we end up with a different colour under the
 749     // text.
 750     wxColour oldColour = GetBackgroundColour();
 751     if (oldColour.Ok())
 752     {
 753         // Need to set twice or it'll optimize the useful stuff out
 754         if (oldColour == * wxWHITE)
 755             SetBackgroundColour(*wxBLACK);
 756         else
 757             SetBackgroundColour(*wxWHITE);
 758         SetBackgroundColour(oldColour);
 759     }
 760 }
 761
 762 void wxTextCtrl::DiscardEdits()
 763 {
 764     m_modified = FALSE;
 765 }
 766
 767 // ----------------------------------------------------------------------------
 768 // max text length support
 769 // ----------------------------------------------------------------------------
 770
 771 void wxTextCtrl::IgnoreNextTextUpdate()
 772 {
 773     m_ignoreNextUpdate = TRUE;
 774 }
 775
 776 bool wxTextCtrl::IgnoreTextUpdate()
 777 {
 778     if ( m_ignoreNextUpdate )
 779     {
 780         m_ignoreNextUpdate = FALSE;
 781
 782         return TRUE;
 783     }
 784
 785     return FALSE;
 786 }
 787
 788 void wxTextCtrl::SetMaxLength(unsigned long len)
 789 {
 790     if ( !HasFlag(wxTE_MULTILINE) )
 791     {
 792         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
 793
 794         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
 795         // we had tried to enter more text than allowed by max text length and
 796         // the text wasn't really changed
 797         //
 798         // to detect this and generate TEXT_MAXLEN event instead of
 799         // TEXT_CHANGED one in this case we also catch "insert_text" signal
 800         //
 801         // when max len is set to 0 we disconnect our handler as it means that
 802         // we shouldn't check anything any more
 803         if ( len )
 804         {
 805             gtk_signal_connect( GTK_OBJECT(m_text),
 806                                 "insert_text",
 807                                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 808                                 (gpointer)this);
 809         }
 810         else // no checking
 811         {
 812             gtk_signal_disconnect_by_func
 813             (
 814                 GTK_OBJECT(m_text),
 815                 GTK_SIGNAL_FUNC(gtk_insert_text_callback),
 816                 (gpointer)this
 817             );
 818         }
 819     }
 820 }
 821
 822 void wxTextCtrl::SetSelection( long from, long to )
 823 {
 824     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 825
 826     if ( (m_windowStyle & wxTE_MULTILINE) &&
 827          !GTK_TEXT(m_text)->line_start_cache )
 828     {
 829         // tell the programmer that it didn't work
 830         wxLogDebug(_T("Can't call SetSelection() before realizing the control"));
 831         return;
 832     }
 833
 834     gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 835 }
 836
 837 void wxTextCtrl::ShowPosition( long pos )
 838 {
 839     if (m_windowStyle & wxTE_MULTILINE)
 840     {
 841         GtkAdjustment *vp = GTK_TEXT(m_text)->vadj;
 842         float totalLines =  (float) GetNumberOfLines();
 843         long posX;
 844         long posY;
 845         PositionToXY(pos, &posX, &posY);
 846         float posLine = (float) posY;
 847         float p = (posLine/totalLines)*(vp->upper - vp->lower) + vp->lower;
 848         gtk_adjustment_set_value(GTK_TEXT(m_text)->vadj, p);
 849     }
 850 }
 851
 852 long wxTextCtrl::GetInsertionPoint() const
 853 {
 854     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 855
 856     return (long) GET_EDITABLE_POS(m_text);
 857 }
 858
 859 long wxTextCtrl::GetLastPosition() const
 860 {
 861     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
 862
 863     int pos = 0;
 864     if (m_windowStyle & wxTE_MULTILINE)
 865         pos = gtk_text_get_length( GTK_TEXT(m_text) );
 866     else
 867         pos = GTK_ENTRY(m_text)->text_length;
 868
 869     return (long)pos;
 870 }
 871
 872 void wxTextCtrl::Remove( long from, long to )
 873 {
 874     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 875
 876     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 877 }
 878
 879 void wxTextCtrl::Replace( long from, long to, const wxString &value )
 880 {
 881     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 882
 883     gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
 884
 885     if (!value.IsEmpty())
 886     {
 887         gint pos = (gint)from;
 888 #if wxUSE_UNICODE
 889         wxWX2MBbuf buf = value.mbc_str();
 890         gtk_editable_insert_text( GTK_EDITABLE(m_text), buf, strlen(buf), &pos );
 891 #else
 892         gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &pos );
 893 #endif
 894     }
 895 }
 896
 897 void wxTextCtrl::Cut()
 898 {
 899     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 900
 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
 908     gtk_editable_copy_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 909 }
 910
 911 void wxTextCtrl::Paste()
 912 {
 913     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 914
 915     gtk_editable_paste_clipboard( GTK_EDITABLE(m_text) DUMMY_CLIPBOARD_ARG );
 916 }
 917
 918 // Undo/redo
 919 void wxTextCtrl::Undo()
 920 {
 921     // TODO
 922     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
 923 }
 924
 925 void wxTextCtrl::Redo()
 926 {
 927     // TODO
 928     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
 929 }
 930
 931 bool wxTextCtrl::CanUndo() const
 932 {
 933     // TODO
 934     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
 935     return FALSE;
 936 }
 937
 938 bool wxTextCtrl::CanRedo() const
 939 {
 940     // TODO
 941     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
 942     return FALSE;
 943 }
 944
 945 // If the return values from and to are the same, there is no
 946 // selection.
 947 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
 948 {
 949     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 950
 951     gint from, to;
 952 #ifdef __WXGTK20__
 953     if ( !gtk_editable_get_selection_bounds(GTK_EDITABLE(m_text), &from, &to) )
 954 #else
 955     if ( !(GTK_EDITABLE(m_text)->has_selection) )
 956 #endif
 957     {
 958         from =
 959         to = GetInsertionPoint();
 960     }
 961     else // got selection
 962     {
 963 #ifndef __WXGTK20__
 964         from = (long) GTK_EDITABLE(m_text)->selection_start_pos;
 965         to = (long) GTK_EDITABLE(m_text)->selection_end_pos;
 966 #endif
 967
 968         if ( from > to )
 969         {
 970             // exchange them to be compatible with wxMSW
 971             gint tmp = from;
 972             from = to;
 973             to = tmp;
 974         }
 975     }
 976
 977     if ( fromOut )
 978         *fromOut = from;
 979     if ( toOut )
 980         *toOut = to;
 981 }
 982
 983 bool wxTextCtrl::IsEditable() const
 984 {
 985     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
 986
 987 #ifdef __WXGTK20__
 988     return gtk_editable_get_editable(GTK_EDITABLE(m_text));
 989 #else
 990     return GTK_EDITABLE(m_text)->editable;
 991 #endif
 992 }
 993
 994 bool wxTextCtrl::IsModified() const
 995 {
 996     return m_modified;
 997 }
 998
 999 void wxTextCtrl::Clear()
1000 {
1001     SetValue( wxT("") );
1002 }
1003
1004 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
1005 {
1006     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1007
1008     if ((key_event.KeyCode() == WXK_RETURN) && (m_windowStyle & wxPROCESS_ENTER))
1009     {
1010         wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1011         event.SetEventObject(this);
1012         event.SetString(GetValue());
1013         if (GetEventHandler()->ProcessEvent(event)) return;
1014     }
1015
1016     if ((key_event.KeyCode() == WXK_RETURN) && !(m_windowStyle & wxTE_MULTILINE))
1017     {
1018         // This will invoke the dialog default action, such
1019         // as the clicking the default button.
1020
1021         wxWindow *top_frame = m_parent;
1022         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1023             top_frame = top_frame->GetParent();
1024
1025         if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1026         {
1027             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1028
1029             if (window->default_widget)
1030             {
1031                 gtk_widget_activate (window->default_widget);
1032                 return;
1033             }
1034         }
1035     }
1036
1037     key_event.Skip();
1038 }
1039
1040 GtkWidget* wxTextCtrl::GetConnectWidget()
1041 {
1042     return GTK_WIDGET(m_text);
1043 }
1044
1045 bool wxTextCtrl::IsOwnGtkWindow( GdkWindow *window )
1046 {
1047     if (m_windowStyle & wxTE_MULTILINE)
1048         return (window == GTK_TEXT(m_text)->text_area);
1049     else
1050         return (window == GTK_ENTRY(m_text)->text_area);
1051 }
1052
1053 // the font will change for subsequent text insertiongs
1054 bool wxTextCtrl::SetFont( const wxFont &font )
1055 {
1056     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1057
1058     if ( !wxTextCtrlBase::SetFont(font) )
1059     {
1060         // font didn't change, nothing to do
1061         return FALSE;
1062     }
1063
1064     if ( m_windowStyle & wxTE_MULTILINE )
1065     {
1066         m_updateFont = TRUE;
1067
1068         m_defaultStyle.SetFont(font);
1069
1070         ChangeFontGlobally();
1071     }
1072
1073     return TRUE;
1074 }
1075
1076 void wxTextCtrl::ChangeFontGlobally()
1077 {
1078     // this method is very inefficient and hence should be called as rarely as
1079     // possible!
1080     wxASSERT_MSG( (m_windowStyle & wxTE_MULTILINE) && m_updateFont,
1081                   _T("shouldn't be called for single line controls") );
1082
1083     wxString value = GetValue();
1084     if ( !value.IsEmpty() )
1085     {
1086         m_updateFont = FALSE;
1087
1088         Clear();
1089         AppendText(value);
1090     }
1091 }
1092
1093 void wxTextCtrl::UpdateFontIfNeeded()
1094 {
1095     if ( m_updateFont )
1096         ChangeFontGlobally();
1097 }
1098
1099 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1100 {
1101     if ( !wxControl::SetForegroundColour(colour) )
1102         return FALSE;
1103
1104     // update default fg colour too
1105     m_defaultStyle.SetTextColour(colour);
1106
1107     return TRUE;
1108 }
1109
1110 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1111 {
1112     wxCHECK_MSG( m_text != NULL, FALSE, wxT("invalid text ctrl") );
1113
1114     if ( !wxControl::SetBackgroundColour( colour ) )
1115         return FALSE;
1116
1117     if (!m_widget->window)
1118         return FALSE;
1119
1120     wxColour sysbg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
1121     if (sysbg.Red() == colour.Red() &&
1122         sysbg.Green() == colour.Green() &&
1123         sysbg.Blue() == colour.Blue())
1124     {
1125         return FALSE; // FIXME or TRUE?
1126     }
1127
1128     if (!m_backgroundColour.Ok())
1129         return FALSE;
1130
1131     if (m_windowStyle & wxTE_MULTILINE)
1132     {
1133         GdkWindow *window = GTK_TEXT(m_text)->text_area;
1134         if (!window)
1135             return FALSE;
1136         m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
1137         gdk_window_set_background( window, m_backgroundColour.GetColor() );
1138         gdk_window_clear( window );
1139     }
1140
1141     // change active background color too
1142     m_defaultStyle.SetBackgroundColour( colour );
1143
1144     return TRUE;
1145 }
1146
1147 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1148 {
1149     /* VERY dirty way to do that - removes the required text and re-adds it
1150        with styling (FIXME) */
1151     if ( m_windowStyle & wxTE_MULTILINE )
1152     {
1153         if ( style.IsDefault() )
1154         {
1155             // nothing to do
1156             return TRUE;
1157         }
1158
1159         gint l = gtk_text_get_length( GTK_TEXT(m_text) );
1160
1161         wxCHECK_MSG( start >= 0 && end <= l, FALSE,
1162                      _T("invalid range in wxTextCtrl::SetStyle") );
1163
1164         gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
1165         char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
1166         wxString tmp(text,*wxConvCurrent);
1167         g_free( text );
1168
1169         gtk_editable_delete_text( GTK_EDITABLE(m_text), start, end );
1170         gtk_editable_set_position( GTK_EDITABLE(m_text), start );
1171
1172 #if wxUSE_UNICODE
1173         wxWX2MBbuf buf = tmp.mbc_str();
1174         const char *txt = buf;
1175         size_t txtlen = strlen(buf);
1176 #else
1177         const char *txt = tmp;
1178         size_t txtlen = tmp.length();
1179 #endif
1180
1181         // use the attributes from style which are set in it and fall back
1182         // first to the default style and then to the text control default
1183         // colours for the others
1184         wxGtkTextInsert(m_text,
1185                         wxTextAttr::Combine(style, m_defaultStyle, this),
1186                         txt,
1187                         txtlen);
1188
1189         /* does not seem to help under GTK+ 1.2 !!!
1190         gtk_editable_set_position( GTK_EDITABLE(m_text), old_pos ); */
1191         SetInsertionPoint( old_pos );
1192         return TRUE;
1193     }
1194     else // singe line
1195     {
1196         // cannot do this for GTK+'s Entry widget
1197         return FALSE;
1198     }
1199 }
1200
1201 void wxTextCtrl::ApplyWidgetStyle()
1202 {
1203     if (m_windowStyle & wxTE_MULTILINE)
1204     {
1205         // how ?
1206     }
1207     else
1208     {
1209         SetWidgetStyle();
1210         gtk_widget_set_style( m_text, m_widgetStyle );
1211     }
1212 }
1213
1214 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1215 {
1216     Cut();
1217 }
1218
1219 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1220 {
1221     Copy();
1222 }
1223
1224 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1225 {
1226     Paste();
1227 }
1228
1229 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1230 {
1231     Undo();
1232 }
1233
1234 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1235 {
1236     Redo();
1237 }
1238
1239 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1240 {
1241     event.Enable( CanCut() );
1242 }
1243
1244 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1245 {
1246     event.Enable( CanCopy() );
1247 }
1248
1249 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1250 {
1251     event.Enable( CanPaste() );
1252 }
1253
1254 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1255 {
1256     event.Enable( CanUndo() );
1257 }
1258
1259 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1260 {
1261     event.Enable( CanRedo() );
1262 }
1263
1264 void wxTextCtrl::OnInternalIdle()
1265 {
1266     wxCursor cursor = m_cursor;
1267     if (g_globalCursor.Ok()) cursor = g_globalCursor;
1268
1269     if (cursor.Ok())
1270     {
1271         GdkWindow *window = (GdkWindow*) NULL;
1272         if (HasFlag(wxTE_MULTILINE))
1273             window = GTK_TEXT(m_text)->text_area;
1274         else
1275             window = GTK_ENTRY(m_text)->text_area;
1276
1277         if (window)
1278             gdk_window_set_cursor( window, cursor.GetCursor() );
1279
1280         if (!g_globalCursor.Ok())
1281             cursor = *wxSTANDARD_CURSOR;
1282
1283         window = m_widget->window;
1284         if ((window) && !(GTK_WIDGET_NO_WINDOW(m_widget)))
1285             gdk_window_set_cursor( window, cursor.GetCursor() );
1286     }
1287
1288     if (g_delayedFocus == this)
1289     {
1290         if (GTK_WIDGET_REALIZED(m_widget))
1291         {
1292             gtk_widget_grab_focus( m_widget );
1293             g_delayedFocus = NULL;
1294         }
1295     }
1296
1297     UpdateWindowUI();
1298 }
1299
1300 wxSize wxTextCtrl::DoGetBestSize() const
1301 {
1302     // FIXME should be different for multi-line controls...
1303     wxSize ret( wxControl::DoGetBestSize() );
1304     return wxSize(80, ret.y);
1305 }
1306
1307 // ----------------------------------------------------------------------------
1308 // freeze/thaw
1309 // ----------------------------------------------------------------------------
1310
1311 void wxTextCtrl::Freeze()
1312 {
1313     if ( HasFlag(wxTE_MULTILINE) )
1314     {
1315         gtk_text_freeze(GTK_TEXT(m_text));
1316     }
1317 }
1318
1319 void wxTextCtrl::Thaw()
1320 {
1321     if ( HasFlag(wxTE_MULTILINE) )
1322     {
1323         GTK_TEXT(m_text)->vadj->value = 0.0;
1324
1325         gtk_text_thaw(GTK_TEXT(m_text));
1326     }
1327 }
1328
1329 // ----------------------------------------------------------------------------
1330 // scrolling
1331 // ----------------------------------------------------------------------------
1332
1333 GtkAdjustment *wxTextCtrl::GetVAdj() const
1334 {
1335     return HasFlag(wxTE_MULTILINE) ? GTK_TEXT(m_text)->vadj : NULL;
1336 }
1337
1338 bool wxTextCtrl::DoScroll(GtkAdjustment *adj, int diff)
1339 {
1340     float value = adj->value + diff;
1341
1342     if ( value < 0 )
1343         value = 0;
1344
1345     float upper = adj->upper - adj->page_size;
1346     if ( value > upper )
1347         value = upper;
1348
1349     // did we noticeably change the scroll position?
1350     if ( fabs(adj->value - value) < 0.2 )
1351     {
1352         // well, this is what Robert does in wxScrollBar, so it must be good...
1353         return FALSE;
1354     }
1355
1356     adj->value = value;
1357
1358     gtk_signal_emit_by_name(GTK_OBJECT(adj), "value_changed");
1359
1360     return TRUE;
1361 }
1362
1363 bool wxTextCtrl::ScrollLines(int lines)
1364 {
1365     GtkAdjustment *adj = GetVAdj();
1366     if ( !adj )
1367         return FALSE;
1368
1369     // this is hardcoded to 10 in GTK+ 1.2 (great idea)
1370     static const int KEY_SCROLL_PIXELS = 10;
1371
1372     return DoScroll(adj, lines*KEY_SCROLL_PIXELS);
1373 }
1374
1375 bool wxTextCtrl::ScrollPages(int pages)
1376 {
1377     GtkAdjustment *adj = GetVAdj();
1378     if ( !adj )
1379         return FALSE;
1380
1381     return DoScroll(adj, (int)ceil(pages*adj->page_increment));
1382 }
1383