samples/richedit/wxlwindow.cpp

   1 /*-*- c++ -*-********************************************************
   2  * wxLwindow.h : a scrolled Window for displaying/entering rich text*
   3  *                                                                  *
   4  * (C) 1998, 1999 by Karsten Ballüder (Ballueder@usa.net)           *
   5  *                                                                  *
   6  * $Id$
   7  *******************************************************************/
   8
   9 // ===========================================================================
  10 // declarations
  11 // ===========================================================================
  12
  13 // ----------------------------------------------------------------------------
  14 // headers
  15 // ----------------------------------------------------------------------------
  16
  17 #ifdef __GNUG__
  18 #   pragma implementation "wxlwindow.h"
  19 #endif
  20
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24 #  pragma hdrstop
  25 #endif
  26
  27 #include "Mpch.h"
  28
  29 #ifdef M_BASEDIR
  30 #   ifndef USE_PCH
  31 #     include "Mcommon.h"
  32 #     include "gui/wxMenuDefs.h"
  33 #     include "gui/wxMApp.h"
  34 #   endif // USE_PCH
  35 #   include "gui/wxlwindow.h"
  36 #   include "gui/wxlparser.h"
  37 #else
  38 #   ifdef   __WXMSW__
  39 #       include <wx/msw/private.h>
  40 #   endif
  41
  42 #   include "wxlwindow.h"
  43 #   include "wxlparser.h"
  44 #endif
  45
  46 #include <wx/clipbrd.h>
  47 #include <wx/textctrl.h>
  48 #include <wx/dataobj.h>
  49
  50 #ifdef WXLAYOUT_USE_CARET
  51 #   include <wx/caret.h>
  52 #endif // WXLAYOUT_USE_CARET
  53
  54 #include <ctype.h>
  55
  56 // ----------------------------------------------------------------------------
  57 // macros
  58 // ----------------------------------------------------------------------------
  59
  60 #ifdef WXLAYOUT_DEBUG
  61 #  define   WXLO_DEBUG(x)      wxLogDebug x
  62 #else
  63 #  define WXLO_DEBUG(x)
  64 #endif
  65
  66 // ----------------------------------------------------------------------------
  67 // constants
  68 // ----------------------------------------------------------------------------
  69
  70 /// offsets to put a nice frame around text
  71 #define WXLO_XOFFSET   4
  72 #define WXLO_YOFFSET   4
  73
  74 /// offset to the right and bottom for when to redraw scrollbars
  75 #define   WXLO_ROFFSET   20
  76 #define   WXLO_BOFFSET   20
  77
  78 /// the size of one scrollbar page in pixels
  79 static const int X_SCROLL_PAGE = 10;
  80 static const int Y_SCROLL_PAGE = 20;
  81
  82 // ----------------------------------------------------------------------------
  83 // event tables
  84 // ----------------------------------------------------------------------------
  85
  86 BEGIN_EVENT_TABLE(wxLayoutWindow,wxScrolledWindow)
  87    EVT_PAINT    (wxLayoutWindow::OnPaint)
  88    EVT_CHAR     (wxLayoutWindow::OnChar)
  89    EVT_KEY_UP   (wxLayoutWindow::OnKeyUp)
  90    EVT_LEFT_DOWN(wxLayoutWindow::OnLeftMouseClick)
  91    EVT_RIGHT_DOWN(wxLayoutWindow::OnRightMouseClick)
  92    EVT_LEFT_DCLICK(wxLayoutWindow::OnMouseDblClick)
  93    EVT_MOTION    (wxLayoutWindow::OnMouseMove)
  94    EVT_MENU_RANGE(WXLOWIN_MENU_FIRST, WXLOWIN_MENU_LAST, wxLayoutWindow::OnMenu)
  95    EVT_SET_FOCUS(wxLayoutWindow::OnSetFocus)
  96    EVT_KILL_FOCUS(wxLayoutWindow::OnKillFocus)
  97 END_EVENT_TABLE()
  98
  99 // ===========================================================================
 100 // implementation
 101 // ===========================================================================
 102
 103 /* LEAVE IT HERE UNTIL WXGTK WORKS AGAIN!!! */
 104 #ifdef __WXGTK__
 105 /// allows me to compare to wxPoints
 106 static bool operator != (wxPoint const &p1, wxPoint const &p2)
 107 {
 108    return p1.x != p2.x || p1.y != p2.y;
 109 }
 110 #endif // __WXGTK__
 111
 112 #ifndef wxWANTS_CHARS
 113    #define wxWANTS_CHARS 0
 114 #endif
 115
 116 // ----------------------------------------------------------------------------
 117 // wxLayoutWindow
 118 // ----------------------------------------------------------------------------
 119
 120 wxLayoutWindow::wxLayoutWindow(wxWindow *parent)
 121               : wxScrolledWindow(parent, -1,
 122                                  wxDefaultPosition, wxDefaultSize,
 123                                  wxHSCROLL | wxVSCROLL |
 124                                  wxBORDER |
 125                                  wxWANTS_CHARS)
 126 {
 127    SetStatusBar(NULL); // don't use statusbar
 128    m_Editable = false;
 129    m_doSendEvents = false;
 130    m_ViewStartX = 0; m_ViewStartY = 0;
 131    m_DoPopupMenu = true;
 132    m_PopupMenu = MakeFormatMenu();
 133    m_memDC = new wxMemoryDC;
 134    m_bitmap = new wxBitmap(4,4);
 135    m_bitmapSize = wxPoint(4,4);
 136    m_llist = new wxLayoutList();
 137
 138    m_BGbitmap = NULL;
 139    m_ScrollToCursor = false;
 140    SetWrapMargin(0);
 141    wxPoint max = m_llist->GetSize();
 142    SetScrollbars(X_SCROLL_PAGE, Y_SCROLL_PAGE,
 143                  max.x / X_SCROLL_PAGE + 1, max.y / Y_SCROLL_PAGE + 1);
 144    EnableScrolling(true, true);
 145    m_maxx = max.x + X_SCROLL_PAGE;
 146    m_maxy = max.y + Y_SCROLL_PAGE;
 147    m_Selecting = false;
 148
 149 #ifdef WXLAYOUT_USE_CARET
 150    // FIXME cursor size shouldn't be hardcoded
 151    wxCaret *caret = new wxCaret(this, 2, 20);
 152    SetCaret(caret);
 153    m_llist->SetCaret(caret);
 154    caret->Show();
 155 #endif // WXLAYOUT_USE_CARET
 156
 157    SetCursorVisibility(-1);
 158    SetCursor(wxCURSOR_IBEAM);
 159    SetDirty();
 160 }
 161
 162 wxLayoutWindow::~wxLayoutWindow()
 163 {
 164    delete m_memDC; // deletes bitmap automatically (?)
 165    delete m_bitmap;
 166    delete m_llist;
 167    delete m_PopupMenu;
 168    SetBackgroundBitmap(NULL);
 169 }
 170
 171 void
 172 wxLayoutWindow::Clear(int family,
 173                       int size,
 174                       int style,
 175                       int weight,
 176                       int underline,
 177                       wxColour *fg,
 178                       wxColour *bg)
 179 {
 180    GetLayoutList()->Clear(family,size,style,weight,underline,fg,bg);
 181    SetBackgroundColour(GetLayoutList()->GetDefaultStyleInfo().GetBGColour());
 182    ResizeScrollbars(true);
 183    SetDirty();
 184    SetModified(false);
 185    wxScrolledWindow::Clear();
 186    DoPaint((wxRect *)NULL);
 187 }
 188
 189 void
 190 wxLayoutWindow::OnMouse(int eventId, wxMouseEvent& event)
 191 {
 192    wxClientDC dc( this );
 193    PrepareDC( dc );
 194    if ( eventId != WXLOWIN_MENU_MOUSEMOVE )
 195    {
 196        // moving the mouse in a window shouldn't give it the focus!
 197       SetFocus();
 198    }
 199
 200    wxPoint findPos;
 201    findPos.x = dc.DeviceToLogicalX(event.GetX());
 202    findPos.y = dc.DeviceToLogicalY(event.GetY());
 203
 204    findPos.x -= WXLO_XOFFSET;
 205    findPos.y -= WXLO_YOFFSET;
 206
 207    if(findPos.x < 0) findPos.x = 0;
 208    if(findPos.y < 0) findPos.y = 0;
 209
 210    m_ClickPosition = wxPoint(event.GetX(), event.GetY());
 211
 212    wxPoint cursorPos;
 213    bool found;
 214    wxLayoutObject *obj = m_llist->FindObjectScreen(dc, findPos,
 215                                                    &cursorPos, &found);
 216    wxLayoutObject::UserData *u = obj ? obj->GetUserData() : NULL;
 217
 218    //has the mouse only been moved?
 219    if(eventId == WXLOWIN_MENU_MOUSEMOVE)
 220    {
 221       // found is only true if we are really over an object, not just
 222       // behind it
 223       if(found && u && ! m_Selecting)
 224       {
 225          if(!m_HandCursor)
 226             SetCursor(wxCURSOR_HAND);
 227          m_HandCursor = TRUE;
 228          if(m_StatusBar && m_StatusFieldLabel != -1)
 229          {
 230             const wxString &label = u->GetLabel();
 231             if(label.Length())
 232                m_StatusBar->SetStatusText(label,
 233                                           m_StatusFieldLabel);
 234          }
 235       }
 236       else
 237       {
 238          if(m_HandCursor)
 239             SetCursor(wxCURSOR_IBEAM);
 240          m_HandCursor = FALSE;
 241          if(m_StatusBar && m_StatusFieldLabel != -1)
 242             m_StatusBar->SetStatusText("", m_StatusFieldLabel);
 243       }
 244       if(event.LeftIsDown())
 245       {
 246          if(! m_Selecting)
 247          {
 248             m_llist->StartSelection(wxPoint(-1, -1), m_ClickPosition);
 249             m_Selecting = true;
 250             DoPaint();  // TODO: we don't have to redraw everything!
 251          }
 252          else
 253          {
 254             m_llist->ContinueSelection(cursorPos, m_ClickPosition);
 255             DoPaint();  // TODO: we don't have to redraw everything!
 256          }
 257       }
 258       if(m_Selecting && ! event.LeftIsDown())
 259       {
 260          m_llist->EndSelection(cursorPos, m_ClickPosition);
 261          m_Selecting = false;
 262          DoPaint();     // TODO: we don't have to redraw everything!
 263       }
 264
 265       if ( u )
 266       {
 267          u->DecRef();
 268          u = NULL;
 269       }
 270    }
 271    else if(eventId == WXLOWIN_MENU_LCLICK)
 272    {
 273       // always move cursor to mouse click:
 274       m_llist->MoveCursorTo(cursorPos);
 275
 276       // clicking a mouse removes the selection
 277       if ( m_llist->HasSelection() )
 278       {
 279          m_llist->DiscardSelection();
 280          DoPaint();     // TODO: we don't have to redraw everything!
 281       }
 282
 283       // Calculate where the top of the visible area is:
 284       int x0, y0;
 285       ViewStart(&x0,&y0);
 286       int dx, dy;
 287       GetScrollPixelsPerUnit(&dx, &dy);
 288       x0 *= dx; y0 *= dy;
 289
 290       wxPoint offset(-x0+WXLO_XOFFSET, -y0+WXLO_YOFFSET);
 291       m_llist->UpdateCursorScreenPos(dc, true, offset);
 292
 293       if(m_CursorVisibility == -1)
 294          m_CursorVisibility = 1;
 295
 296       // VZ: this should be unnecessary because mouse can only click on a
 297       //     visible part of the canvas
 298 #if 0
 299       ScrollToCursor();
 300 #endif // 0
 301
 302 #ifdef __WXGTK__
 303       DoPaint(); // DoPaint suppresses flicker under GTK
 304 #endif // wxGTK
 305    }
 306
 307    // notify about mouse events?
 308    if( m_doSendEvents )
 309    {
 310       // only do the menu if activated, editable and not on a clickable object
 311       if(eventId == WXLOWIN_MENU_RCLICK
 312          && IsEditable()
 313          && (! obj || u == NULL))
 314       {
 315          PopupMenu(m_PopupMenu, m_ClickPosition.x, m_ClickPosition.y);
 316          if(u) u->DecRef();
 317          return;
 318       }
 319
 320       // find the object at this position
 321       if(obj)
 322       {
 323          wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, eventId);
 324          commandEvent.SetEventObject( this );
 325          commandEvent.SetClientData((char *)obj);
 326          GetEventHandler()->ProcessEvent(commandEvent);
 327       }
 328    }
 329
 330    if( u )
 331       u->DecRef();
 332 }
 333
 334 /*
 335  * Some simple keyboard handling.
 336  */
 337 void
 338 wxLayoutWindow::OnChar(wxKeyEvent& event)
 339 {
 340    int keyCode = event.KeyCode();
 341
 342 #ifdef WXLAYOUT_DEBUG
 343    if(keyCode == WXK_F1)
 344    {
 345       m_llist->Debug();
 346       return;
 347    }
 348 #endif
 349
 350    if(! m_Selecting && event.ShiftDown())
 351    {
 352       switch(keyCode)
 353       {
 354       case WXK_UP:
 355       case WXK_DOWN:
 356       case WXK_RIGHT:
 357       case WXK_LEFT:
 358       case WXK_PRIOR:
 359       case WXK_NEXT:
 360       case WXK_HOME:
 361       case WXK_END:
 362          m_Selecting = true;
 363          m_llist->StartSelection();
 364          break;
 365       default:
 366          ;
 367       }
 368    }
 369
 370    // If needed, make cursor visible:
 371    if(m_CursorVisibility == -1)
 372       m_CursorVisibility = 1;
 373
 374    /* These two nested switches work like this:
 375       The first one processes all non-editing keycodes, to move the
 376       cursor, etc. It's default will process all keycodes causing
 377       modifications to the buffer, but only if editing is allowed.
 378    */
 379    bool ctrlDown = event.ControlDown();
 380    switch(keyCode)
 381    {
 382    case WXK_RIGHT:
 383       if ( ctrlDown )
 384          m_llist->MoveCursorWord(1);
 385       else
 386          m_llist->MoveCursorHorizontally(1);
 387       break;
 388    case WXK_LEFT:
 389       if ( ctrlDown )
 390          m_llist->MoveCursorWord(-1);
 391       else
 392          m_llist->MoveCursorHorizontally(-1);
 393       break;
 394    case WXK_UP:
 395       m_llist->MoveCursorVertically(-1);
 396       break;
 397    case WXK_DOWN:
 398       m_llist->MoveCursorVertically(1);
 399       break;
 400    case WXK_PRIOR:
 401       m_llist->MoveCursorVertically(-Y_SCROLL_PAGE);
 402       break;
 403    case WXK_NEXT:
 404       m_llist->MoveCursorVertically(Y_SCROLL_PAGE);
 405       break;
 406    case WXK_HOME:
 407       if ( ctrlDown )
 408          m_llist->MoveCursorTo(wxPoint(0, 0));
 409       else
 410          m_llist->MoveCursorToBeginOfLine();
 411       break;
 412    case WXK_END:
 413       if ( ctrlDown )
 414          m_llist->MoveCursorTo(m_llist->GetSize());
 415       else
 416          m_llist->MoveCursorToEndOfLine();
 417       break;
 418
 419    default:
 420       if(keyCode == 'c' && ctrlDown)
 421       {
 422          // this should work even in read-only mode
 423          Copy();
 424       }
 425       else if( IsEditable() )
 426       {
 427          /* First, handle control keys */
 428          if(event.ControlDown() && ! event.AltDown())
 429          {
 430             switch(keyCode)
 431             {
 432             case WXK_INSERT:
 433                Copy();
 434                break;
 435             case WXK_DELETE :
 436             case 'd':
 437                m_llist->Delete(1);
 438                break;
 439             case 'y':
 440                m_llist->DeleteLines(1);
 441                break;
 442             case 'h': // like backspace
 443                if(m_llist->MoveCursorHorizontally(-1)) m_llist->Delete(1);
 444                break;
 445             case 'u':
 446                m_llist->DeleteToBeginOfLine();
 447                break;
 448             case 'k':
 449                m_llist->DeleteToEndOfLine();
 450                break;
 451             case 'v':
 452                Paste();
 453                break;
 454             case 'x':
 455                Cut();
 456                break;
 457 #ifdef WXLAYOUT_DEBUG
 458             case WXK_F1:
 459                m_llist->SetFont(-1,-1,-1,-1,true);  // underlined
 460                break;
 461 #endif
 462             default:
 463                ;
 464             }
 465          }
 466          // ALT only:
 467          else if( event.AltDown() && ! event.ControlDown() )
 468          {
 469             switch(keyCode)
 470             {
 471             case WXK_DELETE:
 472             case 'd':
 473                m_llist->DeleteWord();
 474                break;
 475             default:
 476                ;
 477             }
 478          }
 479          // no control keys:
 480          else if ( ! event.AltDown() && ! event.ControlDown())
 481          {
 482             switch(keyCode)
 483             {
 484             case WXK_INSERT:
 485                if(event.ShiftDown())
 486                   Paste();
 487                break;
 488             case WXK_DELETE :
 489                if(event.ShiftDown())
 490                   Cut();
 491                else
 492                   m_llist->Delete(1);
 493                break;
 494             case WXK_BACK: // backspace
 495                if(m_llist->MoveCursorHorizontally(-1)) m_llist->Delete(1);
 496                break;
 497             case WXK_RETURN:
 498                if(m_WrapMargin > 0)
 499                   m_llist->WrapLine(m_WrapMargin);
 500                m_llist->LineBreak();
 501                break;
 502             default:
 503                if((!(event.ControlDown() || event.AltDown() || event.MetaDown()))
 504                   && (keyCode < 256 && keyCode >= 32)
 505                   )
 506                {
 507                   if(m_WrapMargin > 0 && isspace(keyCode))
 508                      m_llist->WrapLine(m_WrapMargin);
 509                   m_llist->Insert((char)keyCode);
 510                }
 511                break;
 512             }
 513          }
 514          SetDirty();
 515          SetModified();
 516       }// if(IsEditable())
 517    }// first switch()
 518    if(m_Selecting)
 519    {
 520       if(event.ShiftDown())
 521          m_llist->ContinueSelection();
 522       else
 523       {
 524          m_llist->EndSelection();
 525          m_Selecting = false;
 526       }
 527    }
 528
 529    // we must call ResizeScrollbars() before ScrollToCursor(), otherwise the
 530    // ne cursor position might be outside the current scrolllbar range
 531    ResizeScrollbars();
 532    ScrollToCursor();
 533
 534    // refresh the screen
 535    DoPaint(m_llist->GetUpdateRect());
 536 }
 537
 538 void
 539 wxLayoutWindow::OnKeyUp(wxKeyEvent& event)
 540 {
 541    if(event.KeyCode() == WXK_SHIFT && m_llist->IsSelecting())
 542    {
 543       m_llist->EndSelection();
 544       m_Selecting = false;
 545    }
 546    event.Skip();
 547 }
 548
 549
 550 void
 551 wxLayoutWindow::ScrollToCursor(void)
 552 {
 553    wxClientDC dc( this );
 554    PrepareDC( dc );
 555
 556    int x0,y0,x1,y1, dx, dy;
 557
 558    // Calculate where the top of the visible area is:
 559    ViewStart(&x0,&y0);
 560    GetScrollPixelsPerUnit(&dx, &dy);
 561    x0 *= dx; y0 *= dy;
 562
 563    WXLO_DEBUG(("ScrollToCursor: ViewStart is %d/%d", x0, y0));
 564
 565    // Get the size of the visible window:
 566    GetClientSize(&x1,&y1);
 567
 568    // notice that the client size may be (0, 0)...
 569    wxASSERT(x1 >= 0 && y1 >= 0);
 570
 571    // VZ: I think this is false - if you do it here, ResizeScrollbars() won't
 572    //     call SetScrollbars() later
 573 #if 0
 574    // As we have the values anyway, use them to avoid unnecessary scrollbar
 575    // updates.
 576    if(x1 > m_maxx) m_maxx = x1;
 577    if(y1 > m_maxy) m_maxy = y1;
 578 #endif // 0
 579
 580    // Make sure that the scrollbars are at a position so that the cursor is
 581    // visible if we are editing
 582    WXLO_DEBUG(("m_ScrollToCursor = %d", (int) m_ScrollToCursor));
 583    wxPoint cc = m_llist->GetCursorScreenPos(dc);
 584
 585    // the cursor should be completely visible in both directions
 586    wxPoint cs(m_llist->GetCursorSize());
 587    int nx = -1,
 588        ny = -1;
 589    if ( cc.x < x0 || cc.x >= x0 + x1 - cs.x )
 590    {
 591       nx = cc.x - x1/2;
 592       if ( nx < 0 )
 593          nx = 0;
 594    }
 595
 596    if ( cc.y < y0 || cc.y >= y0 + y1 - cs.y )
 597    {
 598       ny = cc.y - y1/2;
 599       if ( ny < 0)
 600          ny = 0;
 601    }
 602
 603    if ( nx != -1 || ny != -1 )
 604    {
 605       // set new view start
 606       Scroll(nx == -1 ? -1 : (nx+dx-1)/dx, ny == -1 ? -1 : (ny+dy-1)/dy);
 607
 608       // avoid recursion
 609       m_ScrollToCursor = false;
 610    }
 611 }
 612
 613 void
 614 wxLayoutWindow::OnPaint( wxPaintEvent &WXUNUSED(event))
 615 {
 616    wxRect region = GetUpdateRegion().GetBox();
 617    InternalPaint(&region);
 618 }
 619
 620 void
 621 wxLayoutWindow::DoPaint(const wxRect *updateRect)
 622 {
 623 #ifndef __WXMSW__
 624    InternalPaint(updateRect);
 625 #else
 626    Refresh(FALSE, updateRect); // Causes bad flicker under wxGTK!!!
 627
 628    if ( !::UpdateWindow(GetHwnd()) )
 629       wxLogLastError("UpdateWindow");
 630 #endif
 631 }
 632
 633 void
 634 wxLayoutWindow::InternalPaint(const wxRect *updateRect)
 635 {
 636    wxPaintDC dc( this );
 637    PrepareDC( dc );
 638
 639 #ifdef WXLAYOUT_USE_CARET
 640    // hide the caret before drawing anything
 641    GetCaret()->Hide();
 642 #endif // WXLAYOUT_USE_CARET
 643
 644    int x0,y0,x1,y1, dx, dy;
 645
 646    // Calculate where the top of the visible area is:
 647    ViewStart(&x0,&y0);
 648    GetScrollPixelsPerUnit(&dx, &dy);
 649    x0 *= dx; y0 *= dy;
 650
 651    // Get the size of the visible window:
 652    GetClientSize(&x1,&y1);
 653    wxASSERT(x1 >= 0);
 654    wxASSERT(y1 >= 0);
 655
 656    if(updateRect)
 657    {
 658       WXLO_DEBUG(("Update rect: %ld,%ld / %ld,%ld",
 659                   updateRect->x, updateRect->y,
 660                   updateRect->x+updateRect->width,
 661                   updateRect->y+updateRect->height));
 662    }
 663    if(IsDirty())
 664    {
 665       m_llist->Layout(dc);
 666       ResizeScrollbars();
 667    }
 668    /* Check whether the window has grown, if so, we need to reallocate
 669       the bitmap to be larger. */
 670    if(x1 > m_bitmapSize.x || y1 > m_bitmapSize.y)
 671    {
 672       wxASSERT(m_bitmapSize.x > 0);
 673       wxASSERT(m_bitmapSize.y > 0);
 674
 675       m_memDC->SelectObject(wxNullBitmap);
 676       delete m_bitmap;
 677       m_bitmapSize = wxPoint(x1,y1);
 678       m_bitmap = new wxBitmap(x1,y1);
 679       m_memDC->SelectObject(*m_bitmap);
 680    }
 681
 682    m_memDC->SetDeviceOrigin(0,0);
 683    m_memDC->SetBrush(wxBrush(m_llist->GetDefaultStyleInfo().GetBGColour(),wxSOLID));
 684    m_memDC->SetPen(wxPen(m_llist->GetDefaultStyleInfo().GetBGColour(),
 685                          0,wxTRANSPARENT));
 686    m_memDC->SetLogicalFunction(wxCOPY);
 687    m_memDC->Clear();
 688
 689    // fill the background with the background bitmap
 690    if(m_BGbitmap)
 691    {
 692       CoordType
 693          y, x,
 694          w = m_BGbitmap->GetWidth(),
 695          h = m_BGbitmap->GetHeight();
 696       for(y = 0; y < y1; y+=h)
 697          for(x = 0; x < x1; x+=w)
 698             m_memDC->DrawBitmap(*m_BGbitmap, x, y);
 699       m_memDC->SetBackgroundMode(wxTRANSPARENT);
 700    }
 701
 702    // This is the important bit: we tell the list to draw itself
 703 #if WXLO_DEBUG_URECT
 704    if(updateRect)
 705    {
 706       WXLO_DEBUG(("Update rect: %ld,%ld / %ld,%ld",
 707                   updateRect->x, updateRect->y,
 708                   updateRect->x+updateRect->width,
 709                   updateRect->y+updateRect->height));
 710    }
 711 #endif
 712
 713    // Device origins on the memDC are suspect, we translate manually
 714    // with the translate parameter of Draw().
 715    wxPoint offset(-x0+WXLO_XOFFSET,-y0+WXLO_YOFFSET);
 716    m_llist->Draw(*m_memDC,offset, y0, y0+y1);
 717
 718    // We start calculating a new update rect before drawing the
 719    // cursor, so that the cursor coordinates get included in the next
 720    // update rectangle (although they are drawn on the memDC, this is
 721    // needed to erase it):
 722    m_llist->InvalidateUpdateRect();
 723    if(m_CursorVisibility != 0)
 724    {
 725       m_llist->UpdateCursorScreenPos(dc, true, offset);
 726       m_llist->DrawCursor(*m_memDC,
 727                           m_HaveFocus && IsEditable(), // draw a thick
 728                           // cursor for    editable windows with focus
 729                           offset);
 730    }
 731
 732 // Now copy everything to the screen:
 733 #if 0
 734    // This somehow doesn't work, but even the following bit with the
 735    // whole rect at once is still a bit broken I think.
 736    wxRegionIterator ri ( GetUpdateRegion() );
 737    if(ri)
 738       while(ri)
 739       {
 740          WXLO_DEBUG(("UpdateRegion: %ld,%ld, %ld,%ld",
 741                      ri.GetX(),ri.GetY(),ri.GetW(),ri.GetH()));
 742          dc.Blit(x0+ri.GetX(),y0+ri.GetY(),ri.GetW(),ri.GetH(),
 743                  m_memDC,ri.GetX(),ri.GetY(),wxCOPY,FALSE);
 744          ri++;
 745       }
 746    else
 747 #endif
 748    {
 749       // FIXME: Trying to copy only the changed parts, but it does not seem
 750       // to work:
 751 //      x0 = updateRect->x; y0 = updateRect->y;
 752 //      if(updateRect->height < y1)
 753 //         y1 = updateRect->height;
 754 //      y1 += WXLO_YOFFSET; //FIXME might not be needed
 755       dc.Blit(x0,y0,x1,y1,m_memDC,0,0,wxCOPY,FALSE);
 756    }
 757
 758 #ifdef WXLAYOUT_USE_CARET
 759    // show the caret back after everything is redrawn
 760    m_caret->Show();
 761 #endif // WXLAYOUT_USE_CARET
 762
 763    ResetDirty();
 764    m_ScrollToCursor = false;
 765
 766    if ( m_StatusBar && m_StatusFieldCursor != -1 )
 767    {
 768       static wxPoint s_oldCursorPos(-1, -1);
 769
 770       wxPoint pos(m_llist->GetCursorPos());
 771
 772       // avoid unnecessary status bar refreshes
 773       if ( pos != s_oldCursorPos )
 774       {
 775          s_oldCursorPos = pos;
 776
 777          wxString label;
 778          label.Printf(_("Ln:%d Col:%d"), pos.y + 1, pos.x + 1);
 779          m_StatusBar->SetStatusText(label, m_StatusFieldCursor);
 780       }
 781    }
 782 }
 783
 784 // change the range and position of scrollbars
 785 void
 786 wxLayoutWindow::ResizeScrollbars(bool exact)
 787 {
 788    wxPoint max = m_llist->GetSize();
 789
 790    WXLO_DEBUG(("ResizeScrollbars: max size = (%ld, %ld)",
 791                (long int)max.x, (long int) max.y));
 792
 793    if( max.x > m_maxx - WXLO_ROFFSET || max.y > m_maxy - WXLO_BOFFSET || exact )
 794    {
 795       if ( !exact )
 796       {
 797          // add an extra bit to the sizes to avoid future updates
 798          max.x += WXLO_ROFFSET;
 799          max.y += WXLO_BOFFSET;
 800       }
 801
 802       ViewStart(&m_ViewStartX, &m_ViewStartY);
 803       SetScrollbars(X_SCROLL_PAGE, Y_SCROLL_PAGE,
 804                     max.x / X_SCROLL_PAGE + 1, max.y / Y_SCROLL_PAGE + 1,
 805                     m_ViewStartX, m_ViewStartY,
 806                     true);
 807
 808       m_maxx = max.x + X_SCROLL_PAGE;
 809       m_maxy = max.y + Y_SCROLL_PAGE;
 810    }
 811 }
 812
 813 void
 814 wxLayoutWindow::Paste(void)
 815 {
 816    // Read some text
 817    if (wxTheClipboard->Open())
 818    {
 819 #if wxUSE_PRIVATE_CLIPBOARD_FORMAT
 820       wxLayoutDataObject wxldo;
 821       if (wxTheClipboard->IsSupported( wxldo.GetFormat() ))
 822       {
 823          wxTheClipboard->GetData(&wxldo);
 824          {
 825          }
 826          //FIXME: missing functionality m_llist->Insert(wxldo.GetList());
 827       }
 828       else
 829 #endif
 830       {
 831          wxTextDataObject data;
 832          if (wxTheClipboard->IsSupported( data.GetFormat() ))
 833          {
 834             wxTheClipboard->GetData(&data);
 835             wxString text = data.GetText();
 836             wxLayoutImportText( m_llist, text);
 837          }
 838       }
 839       wxTheClipboard->Close();
 840    }
 841
 842 #if 0
 843    /* My attempt to get the primary selection, but it does not
 844       work. :-( */
 845    if(text.Length() == 0)
 846    {
 847       wxTextCtrl tmp_tctrl(this,-1);
 848       tmp_tctrl.Paste();
 849       text += tmp_tctrl.GetValue();
 850    }
 851 #endif
 852 }
 853
 854 bool
 855 wxLayoutWindow::Copy(bool invalidate)
 856 {
 857    // Calling GetSelection() will automatically do an EndSelection()
 858    // on the list, but we need to take a note of it, too:
 859    if(m_Selecting)
 860    {
 861       m_Selecting = false;
 862       m_llist->EndSelection();
 863    }
 864
 865    wxLayoutDataObject wldo;
 866    wxLayoutList *llist = m_llist->GetSelection(&wldo, invalidate);
 867    if(! llist)
 868       return FALSE;
 869    // Export selection as text:
 870    wxString text;
 871    wxLayoutExportObject *export;
 872    wxLayoutExportStatus status(llist);
 873    while((export = wxLayoutExport( &status, WXLO_EXPORT_AS_TEXT)) != NULL)
 874    {
 875       if(export->type == WXLO_EXPORT_TEXT)
 876          text << *(export->content.text);
 877       delete export;
 878    }
 879    delete llist;
 880
 881    // The exporter always appends a newline, so we chop it off if it
 882    // is there:
 883    {
 884       size_t len = text.Length();
 885       if(len > 2 && text[len-2] ==  '\r') // Windows
 886          text = text.Mid(0,len-2);
 887       else if(len > 1 && text[len-1] == '\n')
 888          text = text.Mid(0,len-1);
 889    }
 890
 891
 892    if (wxTheClipboard->Open())
 893    {
 894       wxTextDataObject *data = new wxTextDataObject( text );
 895       bool  rc = wxTheClipboard->SetData( data );
 896 #if wxUSE_PRIVATE_CLIPBOARD_FORMAT
 897       rc |= wxTheClipboard->AddData( &wldo );
 898 #endif
 899       wxTheClipboard->Close();
 900       return rc;
 901    }
 902
 903    return FALSE;
 904 }
 905
 906 bool
 907 wxLayoutWindow::Cut(void)
 908 {
 909    if(Copy(false)) // do not invalidate selection after copy
 910    {
 911       m_llist->DeleteSelection();
 912       return TRUE;
 913    }
 914    else
 915       return FALSE;
 916 }
 917 bool
 918 wxLayoutWindow::Find(const wxString &needle,
 919                      wxPoint * fromWhere)
 920 {
 921    wxPoint found;
 922
 923    if(fromWhere == NULL)
 924       found = m_llist->FindText(needle, m_llist->GetCursorPos());
 925    else
 926       found = m_llist->FindText(needle, *fromWhere);
 927    if(found.x != -1)
 928    {
 929       if(fromWhere)
 930       {
 931          *fromWhere = found;
 932          fromWhere->x ++;
 933       }
 934       m_llist->MoveCursorTo(found);
 935       ScrollToCursor();
 936       return true;
 937    }
 938    return false;
 939 }
 940
 941 wxMenu *
 942 wxLayoutWindow::MakeFormatMenu()
 943 {
 944    wxMenu *m = new wxMenu(_("Layout Menu"));
 945
 946    m->Append(WXLOWIN_MENU_LARGER   ,_("&Larger"),_("Switch to larger font."), false);
 947    m->Append(WXLOWIN_MENU_SMALLER  ,_("&Smaller"),_("Switch to smaller font."), false);
 948    m->AppendSeparator();
 949    m->Append(WXLOWIN_MENU_UNDERLINE_ON, _("&Underline on"),_("Activate underline mode."), false);
 950    m->Append(WXLOWIN_MENU_UNDERLINE_OFF,_("&Underline off"),_("Deactivate underline mode."), false);
 951    m->Append(WXLOWIN_MENU_BOLD_ON      ,_("&Bold on"),_("Activate bold mode."), false);
 952    m->Append(WXLOWIN_MENU_BOLD_OFF     ,_("&Bold off"),_("Deactivate bold mode."), false);
 953    m->Append(WXLOWIN_MENU_ITALICS_ON   ,_("&Italics on"),_("Activate italics mode."), false);
 954    m->Append(WXLOWIN_MENU_ITALICS_OFF  ,_("&Italics off"),_("Deactivate italics mode."), false);
 955    m->AppendSeparator();
 956    m->Append(WXLOWIN_MENU_ROMAN     ,_("&Roman"),_("Switch to roman font."), false);
 957    m->Append(WXLOWIN_MENU_TYPEWRITER,_("&Typewriter"),_("Switch to typewriter font."), false);
 958    m->Append(WXLOWIN_MENU_SANSSERIF ,_("&Sans Serif"),_("Switch to sans serif font."), false);
 959    return m;
 960 }
 961
 962 void wxLayoutWindow::OnMenu(wxCommandEvent& event)
 963 {
 964    switch (event.GetId())
 965    {
 966    case WXLOWIN_MENU_LARGER:
 967       m_llist->SetFontLarger(); break;
 968    case WXLOWIN_MENU_SMALLER:
 969       m_llist->SetFontSmaller(); break;
 970    case WXLOWIN_MENU_UNDERLINE_ON:
 971       m_llist->SetFontUnderline(true); break;
 972    case WXLOWIN_MENU_UNDERLINE_OFF:
 973       m_llist->SetFontUnderline(false); break;
 974    case WXLOWIN_MENU_BOLD_ON:
 975       m_llist->SetFontWeight(wxBOLD); break;
 976    case WXLOWIN_MENU_BOLD_OFF:
 977       m_llist->SetFontWeight(wxNORMAL); break;
 978    case WXLOWIN_MENU_ITALICS_ON:
 979       m_llist->SetFontStyle(wxITALIC); break;
 980    case WXLOWIN_MENU_ITALICS_OFF:
 981       m_llist->SetFontStyle(wxNORMAL); break;
 982    case WXLOWIN_MENU_ROMAN:
 983       m_llist->SetFontFamily(wxROMAN); break;
 984    case WXLOWIN_MENU_TYPEWRITER:
 985       m_llist->SetFontFamily(wxFIXED); break;
 986    case WXLOWIN_MENU_SANSSERIF:
 987       m_llist->SetFontFamily(wxSWISS); break;
 988    }
 989 }
 990
 991 void
 992 wxLayoutWindow::OnSetFocus(wxFocusEvent &ev)
 993 {
 994    m_HaveFocus = true;
 995    ev.Skip();
 996 }
 997
 998 void
 999 wxLayoutWindow::OnKillFocus(wxFocusEvent &ev)
1000 {
1001    m_HaveFocus = false;
1002    ev.Skip();
1003 }