samples/scroll/scroll.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        scroll.cpp
   3 // Purpose:     wxScrolledWindow sample
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (C) 1998 Robert Roebling, 2002 Ron Lee, 2003 Matt Gregory
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/image.h"
  24 #include "wx/listctrl.h"
  25 #include "wx/sizer.h"
  26 #include "wx/log.h"
  27
  28
  29 // derived classes
  30
  31 class MyFrame;
  32 class MyApp;
  33
  34 // MyCanvas
  35
  36 class MyCanvas: public wxScrolledWindow
  37 {
  38 public:
  39     MyCanvas() {}
  40     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  41     ~MyCanvas(){};
  42     void OnPaint( wxPaintEvent &event );
  43     void OnQueryPosition( wxCommandEvent &event );
  44     void OnAddButton( wxCommandEvent &event );
  45     void OnDeleteButton( wxCommandEvent &event );
  46     void OnMoveButton( wxCommandEvent &event );
  47     void OnScrollWin( wxCommandEvent &event );
  48     void OnMouseDown( wxMouseEvent &event );
  49
  50     wxButton *m_button;
  51
  52     DECLARE_DYNAMIC_CLASS(MyCanvas)
  53     DECLARE_EVENT_TABLE()
  54 };
  55
  56
  57 // ----------------------------------------------------------------------------
  58 // Autoscrolling example.
  59 // ----------------------------------------------------------------------------
  60
  61 // this class uses the 'virtual' size attribute along with an internal
  62 // sizer to automatically set up scrollbars as needed
  63
  64 class MyAutoScrollWindow : public wxScrolledWindow
  65 {
  66 private:
  67
  68     wxButton    *m_button;
  69
  70 public:
  71
  72     MyAutoScrollWindow( wxWindow *parent );
  73
  74     void OnResizeClick( wxCommandEvent &WXUNUSED( event ) );
  75
  76     DECLARE_EVENT_TABLE()
  77 };
  78
  79
  80 // ----------------------------------------------------------------------------
  81 // MyScrolledWindow classes: examples of wxScrolledWindow usage
  82 // ----------------------------------------------------------------------------
  83
  84 // base class for both of them
  85 class MyScrolledWindowBase : public wxScrolledWindow
  86 {
  87 public:
  88     MyScrolledWindowBase(wxWindow *parent)
  89         : wxScrolledWindow(parent)
  90         , m_nLines( 100 )
  91     {
  92         wxClientDC dc(this);
  93         dc.GetTextExtent(_T("Line 17"), NULL, &m_hLine);
  94     }
  95
  96 protected:
  97     // the height of one line on screen
  98     wxCoord m_hLine;
  99
 100     // the number of lines we draw
 101     size_t m_nLines;
 102 };
 103
 104 // this class does "stupid" redrawing - it redraws everything each time
 105 // and sets the scrollbar extent directly.
 106
 107 class MyScrolledWindowDumb : public MyScrolledWindowBase
 108 {
 109 public:
 110     MyScrolledWindowDumb(wxWindow *parent) : MyScrolledWindowBase(parent)
 111     {
 112         // no horz scrolling
 113         SetScrollbars(0, m_hLine, 0, m_nLines + 1, 0, 0, true /* no refresh */);
 114     }
 115
 116     virtual void OnDraw(wxDC& dc);
 117 };
 118
 119 // this class does "smart" redrawing - only redraws the lines which must be
 120 // redrawn and sets the scroll rate and virtual size to affect the
 121 // scrollbars.
 122 //
 123 // Note that this class should produce identical results to the one above.
 124
 125 class MyScrolledWindowSmart : public MyScrolledWindowBase
 126 {
 127 public:
 128     MyScrolledWindowSmart(wxWindow *parent) : MyScrolledWindowBase(parent)
 129     {
 130         // no horz scrolling
 131         SetScrollRate( 0, m_hLine );
 132         SetVirtualSize( wxDefaultCoord, ( m_nLines + 1 ) * m_hLine );
 133     }
 134
 135     virtual void OnDraw(wxDC& dc);
 136 };
 137
 138 // ----------------------------------------------------------------------------
 139 // MyAutoTimedScrollingWindow: implements a text viewer with simple blocksize
 140 //                             selection to test auto-scrolling functionality
 141 // ----------------------------------------------------------------------------
 142
 143 class MyAutoTimedScrollingWindow : public wxScrolledWindow
 144 {
 145 protected:  // member data
 146     // test data variables
 147     static const wxChar* sm_testData;
 148     static const int sm_lineCnt; // line count
 149     static const int sm_lineLen; // line length in characters
 150     // sizes for graphical data
 151     wxCoord m_fontH, m_fontW;
 152     // selection tracking
 153     wxPoint m_selStart; // beginning of blockwise selection
 154     wxPoint m_cursor;   // end of blockwise selection (mouse position)
 155
 156 protected:  // gui stuff
 157     wxFont m_font;
 158
 159 public: // interface
 160     MyAutoTimedScrollingWindow( wxWindow* parent );
 161     wxRect DeviceCoordsToGraphicalChars(wxRect updRect) const;
 162     wxPoint DeviceCoordsToGraphicalChars(wxPoint pos) const;
 163     wxPoint GraphicalCharToDeviceCoords(wxPoint pos) const;
 164     wxRect LogicalCoordsToGraphicalChars(wxRect updRect) const;
 165     wxPoint LogicalCoordsToGraphicalChars(wxPoint pos) const;
 166     wxPoint GraphicalCharToLogicalCoords(wxPoint pos) const;
 167     void MyRefresh();
 168     bool IsSelected(int chX, int chY) const;
 169     static bool IsInside(int k, int bound1, int bound2);
 170     static wxRect DCNormalize(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
 171
 172 protected: // event stuff
 173     DECLARE_EVENT_TABLE()
 174     void OnDraw(wxDC& dc);
 175     void OnMouseLeftDown(wxMouseEvent& event);
 176     void OnMouseLeftUp(wxMouseEvent& event);
 177     void OnMouseMove(wxMouseEvent& event);
 178     void OnScroll(wxScrollWinEvent& event);
 179 };
 180
 181 // ----------------------------------------------------------------------------
 182 // MyFrame
 183 // ----------------------------------------------------------------------------
 184
 185 class MyFrame: public wxFrame
 186 {
 187 public:
 188     MyFrame();
 189
 190     void OnAbout( wxCommandEvent &event );
 191     void OnQuit( wxCommandEvent &event );
 192     void OnDeleteAll( wxCommandEvent &event );
 193     void OnInsertNew( wxCommandEvent &event );
 194
 195     MyCanvas         *m_canvas;
 196     wxTextCtrl       *m_log;
 197
 198     DECLARE_DYNAMIC_CLASS(MyFrame)
 199     DECLARE_EVENT_TABLE()
 200 };
 201
 202 // ----------------------------------------------------------------------------
 203 // MyApp
 204 // ----------------------------------------------------------------------------
 205
 206 class MyApp: public wxApp
 207 {
 208 public:
 209     virtual bool OnInit();
 210 };
 211
 212
 213 // ----------------------------------------------------------------------------
 214 // main program
 215 // ----------------------------------------------------------------------------
 216
 217 IMPLEMENT_APP(MyApp)
 218
 219 // ids
 220
 221 const long   ID_ADDBUTTON   = wxNewId();
 222 const long   ID_DELBUTTON   = wxNewId();
 223 const long   ID_MOVEBUTTON  = wxNewId();
 224 const long   ID_SCROLLWIN   = wxNewId();
 225 const long   ID_QUERYPOS    = wxNewId();
 226
 227 const long   ID_NEWBUTTON   = wxNewId();
 228
 229 // ----------------------------------------------------------------------------
 230 // MyCanvas
 231 // ----------------------------------------------------------------------------
 232
 233 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 234
 235 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 236   EVT_PAINT(                  MyCanvas::OnPaint)
 237   EVT_MOUSE_EVENTS(           MyCanvas::OnMouseDown)
 238   EVT_BUTTON( ID_QUERYPOS,    MyCanvas::OnQueryPosition)
 239   EVT_BUTTON( ID_ADDBUTTON,   MyCanvas::OnAddButton)
 240   EVT_BUTTON( ID_DELBUTTON,   MyCanvas::OnDeleteButton)
 241   EVT_BUTTON( ID_MOVEBUTTON,  MyCanvas::OnMoveButton)
 242   EVT_BUTTON( ID_SCROLLWIN,   MyCanvas::OnScrollWin)
 243 END_EVENT_TABLE()
 244
 245 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 246                     const wxPoint &pos, const wxSize &size )
 247     : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, _T("test canvas") )
 248 {
 249     SetScrollRate( 10, 10 );
 250     SetVirtualSize( 500, 1000 );
 251
 252     (void) new wxButton( this, ID_ADDBUTTON,  _T("add button"), wxPoint(10,10) );
 253     (void) new wxButton( this, ID_DELBUTTON,  _T("del button"), wxPoint(10,40) );
 254     (void) new wxButton( this, ID_MOVEBUTTON, _T("move button"), wxPoint(150,10) );
 255     (void) new wxButton( this, ID_SCROLLWIN,  _T("scroll win"), wxPoint(250,10) );
 256
 257 #if 0
 258
 259     wxString choices[] =
 260     {
 261         "This",
 262         "is one of my",
 263         "really",
 264         "wonderful",
 265         "examples."
 266     };
 267
 268     m_button = new wxButton( this, ID_QUERYPOS, "Query position", wxPoint(10,110) );
 269
 270     (void) new wxTextCtrl( this, wxID_ANY, "wxTextCtrl", wxPoint(10,150), wxSize(80,wxDefaultCoord) );
 271
 272     (void) new wxRadioButton( this, wxID_ANY, "Disable", wxPoint(10,190) );
 273
 274     (void) new wxComboBox( this, wxID_ANY, "This", wxPoint(10,230), wxDefaultSize, 5, choices );
 275
 276     (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,310), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_COLS );
 277
 278     (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,440), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_ROWS );
 279
 280     wxListCtrl *m_listCtrl = new wxListCtrl(
 281             this, wxID_ANY, wxPoint(200, 110), wxSize(180, 120),
 282             wxLC_REPORT | wxSIMPLE_BORDER | wxLC_SINGLE_SEL );
 283
 284     m_listCtrl->InsertColumn(0, "First", wxLIST_FORMAT_LEFT, 90);
 285     m_listCtrl->InsertColumn(1, "Last", wxLIST_FORMAT_LEFT, 90);
 286
 287     for ( int i=0; i < 30; i++)
 288     {
 289         char buf[20];
 290         sprintf(buf, "Item %d", i);
 291         m_listCtrl->InsertItem(i, buf);
 292     }
 293     m_listCtrl->SetItemState( 3, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED );
 294
 295     (void) new wxListBox( this, wxID_ANY, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
 296
 297 #endif
 298
 299     wxPanel *test = new wxPanel( this, wxID_ANY, wxPoint(10, 110), wxSize(130,50), wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
 300     test->SetBackgroundColour( wxT("WHEAT") );
 301
 302 #if 0
 303
 304     wxButton *test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
 305
 306     test = new wxPanel( this, wxID_ANY, wxPoint(160, 530), wxSize(130,120), wxSUNKEN_BORDER | wxTAB_TRAVERSAL );
 307     test->SetBackgroundColour( wxT("WHEAT") );
 308     test->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
 309     test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
 310     test2->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
 311
 312     test = new wxPanel( this, wxID_ANY, wxPoint(310, 530), wxSize(130,120), wxRAISED_BORDER | wxTAB_TRAVERSAL );
 313     test->SetBackgroundColour( wxT("WHEAT") );
 314     test->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
 315     test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
 316     test2->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
 317
 318 #endif
 319
 320     SetBackgroundColour( wxT("BLUE") );
 321
 322     SetCursor( wxCursor( wxCURSOR_IBEAM ) );
 323 }
 324
 325 void MyCanvas::OnMouseDown( wxMouseEvent &event )
 326 {
 327     if (event.LeftDown())
 328     {
 329         wxPoint pt( event.GetPosition() );
 330         int x,y;
 331         CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
 332         wxLogMessage( wxT("Mouse down event at: %d %d, scrolled: %d %d"), pt.x, pt.y, x, y );
 333
 334         if ( !event.LeftIsDown() )
 335             wxLogMessage( wxT("Error: LeftIsDown() should be true if for LeftDown()") );
 336     }
 337 }
 338
 339 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 340 {
 341     wxPaintDC dc( this );
 342     PrepareDC( dc );
 343
 344     dc.DrawText( _T("Press mouse button to test calculations!"), 160, 50 );
 345
 346     dc.DrawText( _T("Some text"), 140, 140 );
 347
 348     dc.DrawRectangle( 100, 160, 200, 200 );
 349 }
 350
 351 void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) )
 352 {
 353     wxPoint pt( m_button->GetPosition() );
 354     wxLogMessage( wxT("Position of \"Query position\" is %d %d"), pt.x, pt.y );
 355     pt = ClientToScreen( pt );
 356     wxLogMessage( wxT("Position of \"Query position\" on screen is %d %d"), pt.x, pt.y );
 357 }
 358
 359 void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) )
 360 {
 361     wxLogMessage( wxT("Inserting button at position 10,70...") );
 362     wxButton *button = new wxButton( this, ID_NEWBUTTON, wxT("new button"), wxPoint(10,70), wxSize(80,25) );
 363     wxPoint pt( button->GetPosition() );
 364     wxLogMessage( wxT("-> Position after inserting %d %d"), pt.x, pt.y );
 365 }
 366
 367 void MyCanvas::OnDeleteButton( wxCommandEvent &WXUNUSED(event) )
 368 {
 369     wxLogMessage( wxT("Deleting button inserted with \"Add button\"...") );
 370     wxWindow *win = FindWindow( ID_NEWBUTTON );
 371     if (win)
 372        win->Destroy();
 373     else
 374        wxLogMessage( wxT("-> No window with id = ID_NEWBUTTON found.") );
 375 }
 376
 377 void MyCanvas::OnMoveButton( wxCommandEvent &event )
 378 {
 379     wxLogMessage( wxT("Moving button 10 pixels downward..") );
 380     wxWindow *win = FindWindow( event.GetId() );
 381     wxPoint pt( win->GetPosition() );
 382     wxLogMessage( wxT("-> Position before move is %d %d"), pt.x, pt.y );
 383     win->Move( wxDefaultCoord, pt.y + 10 );
 384     pt = win->GetPosition();
 385     wxLogMessage( wxT("-> Position after move is %d %d"), pt.x, pt.y );
 386 }
 387
 388 void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) )
 389 {
 390     wxLogMessage( wxT("Scrolling 2 units up.\nThe white square and the controls should move equally!") );
 391     int x,y;
 392     GetViewStart( &x, &y );
 393     Scroll( wxDefaultCoord, y+2 );
 394 }
 395
 396 // ----------------------------------------------------------------------------
 397 // MyAutoScrollWindow
 398 // ----------------------------------------------------------------------------
 399
 400 const long   ID_RESIZEBUTTON = wxNewId();
 401 const wxSize SMALL_BUTTON( 100, 50 );
 402 const wxSize LARGE_BUTTON( 300, 100 );
 403
 404 BEGIN_EVENT_TABLE( MyAutoScrollWindow, wxScrolledWindow)
 405   EVT_BUTTON( ID_RESIZEBUTTON,    MyAutoScrollWindow::OnResizeClick)
 406 END_EVENT_TABLE()
 407
 408 MyAutoScrollWindow::MyAutoScrollWindow( wxWindow *parent )
 409     : wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize,
 410                         wxSUNKEN_BORDER|wxScrolledWindowStyle )
 411 {
 412     SetBackgroundColour( wxT("GREEN") );
 413
 414     // Set the rate we'd like for scrolling.
 415
 416     SetScrollRate( 5, 5 );
 417
 418     // Populate a sizer with a 'resizing' button and some
 419     // other static decoration
 420
 421     wxFlexGridSizer  *innersizer = new wxFlexGridSizer( 2, 2 );
 422
 423     m_button = new wxButton( this,
 424                              ID_RESIZEBUTTON,
 425                              _T("Press me"),
 426                              wxDefaultPosition,
 427                              SMALL_BUTTON );
 428
 429     // We need to do this here, because wxADJUST_MINSIZE below
 430     // will cause the initial size to be ignored for Best/Min size.
 431     // It would be nice to fix the sizers to handle this a little
 432     // more cleanly.
 433
 434     m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
 435
 436     innersizer->Add( m_button,
 437                      0,
 438                      wxALIGN_CENTER | wxALL | wxADJUST_MINSIZE,
 439                      20 );
 440
 441     innersizer->Add( new wxStaticText( this, wxID_ANY, _T("This is just") ),
 442                     0,
 443                     wxALIGN_CENTER );
 444
 445     innersizer->Add( new wxStaticText( this, wxID_ANY, _T("some decoration") ),
 446                     0,
 447                     wxALIGN_CENTER );
 448
 449     innersizer->Add( new wxStaticText( this, wxID_ANY, _T("for you to scroll...") ),
 450                     0,
 451                     wxALIGN_CENTER );
 452
 453     // Then use the sizer to set the scrolled region size.
 454
 455     SetSizer( innersizer );
 456 }
 457
 458 void MyAutoScrollWindow::OnResizeClick( wxCommandEvent &WXUNUSED( event ) )
 459 {
 460     // Arbitrarily resize the button to change the minimum size of
 461     // the (scrolled) sizer.
 462
 463     if( m_button->GetSize() == SMALL_BUTTON )
 464         m_button->SetSizeHints( LARGE_BUTTON.GetWidth(), LARGE_BUTTON.GetHeight() );
 465     else
 466         m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
 467
 468     // Force update layout and scrollbars, since nothing we do here
 469     // necessarily generates a size event which would do it for us.
 470
 471     FitInside();
 472 }
 473
 474 // ----------------------------------------------------------------------------
 475 // MyFrame
 476 // ----------------------------------------------------------------------------
 477
 478 const long ID_QUIT       = wxID_EXIT;
 479 const long ID_ABOUT      = wxID_ABOUT;
 480 const long ID_DELETE_ALL = 100;
 481 const long ID_INSERT_NEW = 101;
 482
 483 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 484
 485 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 486   EVT_MENU    (ID_DELETE_ALL, MyFrame::OnDeleteAll)
 487   EVT_MENU    (ID_INSERT_NEW,  MyFrame::OnInsertNew)
 488   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 489   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 490 END_EVENT_TABLE()
 491
 492 MyFrame::MyFrame()
 493        : wxFrame( (wxFrame *)NULL, wxID_ANY, _T("wxScrolledWindow sample"),
 494                   wxPoint(20,20), wxSize(800,500) )
 495 {
 496     wxMenu *file_menu = new wxMenu();
 497     file_menu->Append( ID_DELETE_ALL, _T("Delete all"));
 498     file_menu->Append( ID_INSERT_NEW, _T("Insert new"));
 499     file_menu->Append( ID_ABOUT,      _T("&About.."));
 500     file_menu->Append( ID_QUIT,       _T("E&xit\tAlt-X"));
 501
 502     wxMenuBar *menu_bar = new wxMenuBar();
 503     menu_bar->Append(file_menu, _T("&File"));
 504
 505     SetMenuBar( menu_bar );
 506
 507 #if wxUSE_STATUSBAR
 508     CreateStatusBar(2);
 509     int widths[] = { -1, 100 };
 510     SetStatusWidths( 2, widths );
 511 #endif // wxUSE_STATUSBAR
 512
 513      wxBoxSizer *topsizer = new wxBoxSizer( wxHORIZONTAL );
 514      // subsizer splits topsizer down the middle
 515      wxBoxSizer *subsizer = new wxBoxSizer( wxVERTICAL );
 516
 517     // Setting an explicit size here is superfluous, it will be overridden
 518     // by the sizer in any case.
 519     m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(100,100) );
 520
 521     // This is done with ScrollRate/VirtualSize in MyCanvas ctor now,
 522     // both should produce identical results.
 523     //m_canvas->SetScrollbars( 10, 10, 50, 100 );
 524
 525     subsizer->Add( m_canvas, 1, wxEXPAND );
 526     subsizer->Add( new MyAutoScrollWindow( this ), 1, wxEXPAND );
 527
 528     wxSizer *sizerBtm = new wxBoxSizer(wxHORIZONTAL);
 529     sizerBtm->Add( new MyScrolledWindowDumb(this), 1, wxEXPAND );
 530     sizerBtm->Add( new MyScrolledWindowSmart(this), 1, wxEXPAND );
 531     subsizer->Add( sizerBtm, 1, wxEXPAND );
 532
 533     topsizer->Add( subsizer, 1, wxEXPAND );
 534     topsizer->Add( new MyAutoTimedScrollingWindow( this ), 1, wxEXPAND );
 535
 536     SetSizer( topsizer );
 537 }
 538
 539 void MyFrame::OnDeleteAll( wxCommandEvent &WXUNUSED(event) )
 540 {
 541     m_canvas->DestroyChildren();
 542 }
 543
 544 void MyFrame::OnInsertNew( wxCommandEvent &WXUNUSED(event) )
 545 {
 546     (void)new wxButton( m_canvas, wxID_ANY, _T("Hello"), wxPoint(100,100) );
 547 }
 548
 549 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 550 {
 551   Close( true );
 552 }
 553
 554 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 555 {
 556    (void)wxMessageBox( _T("wxScroll demo\n")
 557                        _T("Robert Roebling (c) 1998\n")
 558                        _T("Autoscrolling examples\n")
 559                        _T("Ron Lee (c) 2002\n")
 560                        _T("Auto-timed-scrolling example\n")
 561                        _T("Matt Gregory (c) 2003\n"),
 562                        _T("About wxScroll Demo"),
 563                        wxICON_INFORMATION | wxOK );
 564 }
 565
 566 //-----------------------------------------------------------------------------
 567 // MyApp
 568 //-----------------------------------------------------------------------------
 569
 570 bool MyApp::OnInit()
 571 {
 572   wxFrame *frame = new MyFrame();
 573   frame->Show( true );
 574
 575   return true;
 576 }
 577
 578 // ----------------------------------------------------------------------------
 579 // MyScrolledWindowXXX
 580 // ----------------------------------------------------------------------------
 581
 582 void MyScrolledWindowDumb::OnDraw(wxDC& dc)
 583 {
 584     // this is useful to see which lines are redrawn
 585     static size_t s_redrawCount = 0;
 586     dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
 587
 588     wxCoord y = 0;
 589     for ( size_t line = 0; line < m_nLines; line++ )
 590     {
 591         wxCoord yPhys;
 592         CalcScrolledPosition(0, y, NULL, &yPhys);
 593
 594         dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
 595                                      line, y, yPhys), 0, y);
 596         y += m_hLine;
 597     }
 598 }
 599
 600 void MyScrolledWindowSmart::OnDraw(wxDC& dc)
 601 {
 602     // this is useful to see which lines are redrawn
 603     static size_t s_redrawCount = 0;
 604     dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
 605
 606     // update region is always in device coords, translate to logical ones
 607     wxRect rectUpdate = GetUpdateRegion().GetBox();
 608     CalcUnscrolledPosition(rectUpdate.x, rectUpdate.y,
 609                            &rectUpdate.x, &rectUpdate.y);
 610
 611     size_t lineFrom = rectUpdate.y / m_hLine,
 612            lineTo = rectUpdate.GetBottom() / m_hLine;
 613
 614     if ( lineTo > m_nLines - 1)
 615         lineTo = m_nLines - 1;
 616
 617     wxCoord y = lineFrom*m_hLine;
 618     for ( size_t line = lineFrom; line <= lineTo; line++ )
 619     {
 620         wxCoord yPhys;
 621         CalcScrolledPosition(0, y, NULL, &yPhys);
 622
 623         dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
 624                                      line, y, yPhys), 0, y);
 625         y += m_hLine;
 626     }
 627 }
 628
 629 // ----------------------------------------------------------------------------
 630 // MyAutoTimedScrollingWindow
 631 // ----------------------------------------------------------------------------
 632
 633 BEGIN_EVENT_TABLE(MyAutoTimedScrollingWindow, wxScrolledWindow)
 634     EVT_LEFT_DOWN(MyAutoTimedScrollingWindow::OnMouseLeftDown)
 635     EVT_LEFT_UP(MyAutoTimedScrollingWindow::OnMouseLeftUp)
 636     EVT_MOTION(MyAutoTimedScrollingWindow::OnMouseMove)
 637     EVT_SCROLLWIN(MyAutoTimedScrollingWindow::OnScroll)
 638 END_EVENT_TABLE()
 639
 640 MyAutoTimedScrollingWindow::MyAutoTimedScrollingWindow(wxWindow* parent)
 641     : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize
 642             //, wxSUNKEN_BORDER) // can't seem to do it this way
 643             , wxVSCROLL | wxHSCROLL | wxSUNKEN_BORDER)
 644     , m_selStart(-1, -1), m_cursor(-1, -1)
 645     , m_font(9, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL
 646             , wxFONTWEIGHT_NORMAL)
 647 {
 648     wxClientDC dc(this);
 649     // query dc for text size
 650     dc.SetFont(m_font);
 651     dc.GetTextExtent(wxString(_T("A")), &m_fontW, &m_fontH);
 652     // set up the virtual window
 653     SetScrollbars(m_fontW, m_fontH, sm_lineLen, sm_lineCnt);
 654 }
 655
 656 wxRect MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
 657         (wxRect updRect) const
 658 {
 659     wxPoint pos(updRect.GetPosition());
 660     pos = DeviceCoordsToGraphicalChars(pos);
 661     updRect.x = pos.x;
 662     updRect.y = pos.y;
 663     updRect.width /= m_fontW;
 664     updRect.height /= m_fontH;
 665     // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
 666     //   so an off-by-one correction is needed
 667     ++updRect.width; // kludge
 668     ++updRect.height; // kludge
 669     return updRect;
 670 }
 671
 672 wxPoint MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
 673         (wxPoint pos) const
 674 {
 675     pos.x /= m_fontW;
 676     pos.y /= m_fontH;
 677     int vX, vY;
 678     GetViewStart(&vX, &vY);
 679     pos.x += vX;
 680     pos.y += vY;
 681     return pos;
 682 }
 683
 684 wxPoint MyAutoTimedScrollingWindow::GraphicalCharToDeviceCoords
 685         (wxPoint pos) const
 686 {
 687     int vX, vY;
 688     GetViewStart(&vX, &vY);
 689     pos.x -= vX;
 690     pos.y -= vY;
 691     pos.x *= m_fontW;
 692     pos.y *= m_fontH;
 693     return pos;
 694 }
 695
 696 wxRect MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
 697         (wxRect updRect) const
 698 {
 699     wxPoint pos(updRect.GetPosition());
 700     pos = LogicalCoordsToGraphicalChars(pos);
 701     updRect.x = pos.x;
 702     updRect.y = pos.y;
 703     updRect.width /= m_fontW;
 704     updRect.height /= m_fontH;
 705     // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
 706     //   so an off-by-one correction is needed
 707     ++updRect.width; // kludge
 708     ++updRect.height; // kludge
 709     return updRect;
 710 }
 711
 712 wxPoint MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
 713         (wxPoint pos) const
 714 {
 715     pos.x /= m_fontW;
 716     pos.y /= m_fontH;
 717     return pos;
 718 }
 719
 720 wxPoint MyAutoTimedScrollingWindow::GraphicalCharToLogicalCoords
 721         (wxPoint pos) const
 722 {
 723     pos.x *= m_fontW;
 724     pos.y *= m_fontH;
 725     return pos;
 726 }
 727
 728 void MyAutoTimedScrollingWindow::MyRefresh()
 729 {
 730     static wxPoint lastSelStart(-1, -1), lastCursor(-1, -1);
 731     // refresh last selected area (to deselect previously selected text)
 732     wxRect lastUpdRect(
 733             GraphicalCharToDeviceCoords(lastSelStart),
 734             GraphicalCharToDeviceCoords(lastCursor)
 735         );
 736     // off-by-one corrections, necessary because it's not possible to know
 737     //   when to round up until rect is normalized by lastUpdRect constructor
 738     lastUpdRect.width += m_fontW; // kludge
 739     lastUpdRect.height += m_fontH; // kludge
 740     // refresh currently selected (to select previously unselected text)
 741     wxRect updRect(
 742             GraphicalCharToDeviceCoords(m_selStart),
 743             GraphicalCharToDeviceCoords(m_cursor)
 744         );
 745     // off-by-one corrections
 746     updRect.width += m_fontW; // kludge
 747     updRect.height += m_fontH; // kludge
 748     // find necessary refresh areas
 749     wxCoord rx = lastUpdRect.x;
 750     wxCoord ry = lastUpdRect.y;
 751     wxCoord rw = updRect.x - lastUpdRect.x;
 752     wxCoord rh = lastUpdRect.height;
 753     if (rw && rh) {
 754         RefreshRect(DCNormalize(rx, ry, rw, rh));
 755     }
 756     rx = updRect.x;
 757     ry = updRect.y + updRect.height;
 758     rw= updRect.width;
 759     rh = (lastUpdRect.y + lastUpdRect.height) - (updRect.y + updRect.height);
 760     if (rw && rh) {
 761         RefreshRect(DCNormalize(rx, ry, rw, rh));
 762     }
 763     rx = updRect.x + updRect.width;
 764     ry = lastUpdRect.y;
 765     rw = (lastUpdRect.x + lastUpdRect.width) - (updRect.x + updRect.width);
 766     rh = lastUpdRect.height;
 767     if (rw && rh) {
 768         RefreshRect(DCNormalize(rx, ry, rw, rh));
 769     }
 770     rx = updRect.x;
 771     ry = lastUpdRect.y;
 772     rw = updRect.width;
 773     rh = updRect.y - lastUpdRect.y;
 774     if (rw && rh) {
 775         RefreshRect(DCNormalize(rx, ry, rw, rh));
 776     }
 777     // update last
 778     lastSelStart = m_selStart;
 779     lastCursor = m_cursor;
 780 }
 781
 782 bool MyAutoTimedScrollingWindow::IsSelected(int chX, int chY) const
 783 {
 784     if (IsInside(chX, m_selStart.x, m_cursor.x)
 785             && IsInside(chY, m_selStart.y, m_cursor.y)) {
 786         return true;
 787     }
 788     return false;
 789 }
 790
 791 bool MyAutoTimedScrollingWindow::IsInside(int k, int bound1, int bound2)
 792 {
 793     if ((k >= bound1 && k <= bound2) || (k >= bound2 && k <= bound1)) {
 794         return true;
 795     }
 796     return false;
 797 }
 798
 799 wxRect MyAutoTimedScrollingWindow::DCNormalize(wxCoord x, wxCoord y
 800         , wxCoord w, wxCoord h)
 801 {
 802     // this is needed to get rid of the graphical remnants from the selection
 803     // I think it's because DrawRectangle() excludes a pixel in either direction
 804     const int kludge = 1;
 805     // make (x, y) the top-left corner
 806     if (w < 0) {
 807         w = -w + kludge;
 808         x -= w;
 809     } else {
 810         x -= kludge;
 811         w += kludge;
 812     }
 813     if (h < 0) {
 814         h = -h + kludge;
 815         y -= h;
 816     } else {
 817         y -= kludge;
 818         h += kludge;
 819     }
 820     return wxRect(x, y, w, h);
 821 }
 822
 823 void MyAutoTimedScrollingWindow::OnDraw(wxDC& dc)
 824 {
 825     dc.SetFont(m_font);
 826     wxBrush normBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)
 827             , wxSOLID);
 828     wxBrush selBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT)
 829             , wxSOLID);
 830     dc.SetPen(*wxTRANSPARENT_PEN);
 831     wxString str = sm_testData;
 832
 833     // draw the characters
 834     // 1. for each update region
 835     for (wxRegionIterator upd(GetUpdateRegion()); upd; ++upd) {
 836         wxRect updRect = upd.GetRect();
 837         wxRect updRectInGChars(DeviceCoordsToGraphicalChars(updRect));
 838         // 2. for each row of chars in the update region
 839         for (int chY = updRectInGChars.y
 840                 ; chY <= updRectInGChars.y + updRectInGChars.height; ++chY) {
 841             // 3. for each character in the row
 842             for (int chX = updRectInGChars.x
 843                     ; chX <= updRectInGChars.x + updRectInGChars.width
 844                     ; ++chX) {
 845                 // 4. set up dc
 846                 if (IsSelected(chX, chY)) {
 847                     dc.SetBrush(selBrush);
 848                     dc.SetTextForeground( wxSystemSettings::GetColour
 849                             (wxSYS_COLOUR_HIGHLIGHTTEXT));
 850                 } else {
 851                     dc.SetBrush(normBrush);
 852                     dc.SetTextForeground( wxSystemSettings::GetColour
 853                             (wxSYS_COLOUR_WINDOWTEXT));
 854                 }
 855                 // 5. find position info
 856                 wxPoint charPos = GraphicalCharToLogicalCoords(wxPoint
 857                         (chX, chY));
 858                 // 6. draw!
 859                 dc.DrawRectangle(charPos.x, charPos.y, m_fontW, m_fontH);
 860                 size_t charIndex = chY * sm_lineLen + chX;
 861                 if (chY < sm_lineCnt &&
 862                     chX < sm_lineLen &&
 863                     charIndex < str.Length())
 864                 {
 865                     dc.DrawText(str.Mid(charIndex,1),
 866                                 charPos.x, charPos.y);
 867                 }
 868             }
 869         }
 870     }
 871 }
 872
 873 void MyAutoTimedScrollingWindow::OnMouseLeftDown(wxMouseEvent& event)
 874 {
 875     // initial press of mouse button sets the beginning of the selection
 876     m_selStart = DeviceCoordsToGraphicalChars(event.GetPosition());
 877     // set the cursor to the same position
 878     m_cursor = m_selStart;
 879     // draw/erase selection
 880     MyRefresh();
 881 }
 882
 883 void MyAutoTimedScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event))
 884 {
 885     // this test is necessary
 886     if (HasCapture()) {
 887         // uncapture mouse
 888         ReleaseMouse();
 889     }
 890 }
 891
 892 void MyAutoTimedScrollingWindow::OnMouseMove(wxMouseEvent& event)
 893 {
 894     // if user is dragging
 895     if (event.Dragging() && event.LeftIsDown()) {
 896         // set the new cursor position
 897         m_cursor = DeviceCoordsToGraphicalChars(event.GetPosition());
 898         // draw/erase selection
 899         MyRefresh();
 900         // capture mouse to activate auto-scrolling
 901         if (!HasCapture()) {
 902             CaptureMouse();
 903         }
 904     }
 905 }
 906
 907 void MyAutoTimedScrollingWindow::OnScroll(wxScrollWinEvent& event)
 908 {
 909     // need to move the cursor when autoscrolling
 910     // FIXME: the cursor also moves when the scrollbar arrows are clicked
 911     if (HasCapture()) {
 912         if (event.GetOrientation() == wxHORIZONTAL) {
 913             if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
 914                 --m_cursor.x;
 915             } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
 916                 ++m_cursor.x;
 917             }
 918         } else if (event.GetOrientation() == wxVERTICAL) {
 919             if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
 920                 --m_cursor.y;
 921             } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
 922                 ++m_cursor.y;
 923             }
 924         }
 925     }
 926     MyRefresh();
 927     event.Skip();
 928 }
 929
 930 const int MyAutoTimedScrollingWindow::sm_lineCnt = 125;
 931 const int MyAutoTimedScrollingWindow::sm_lineLen = 79;
 932 const wxChar* MyAutoTimedScrollingWindow::sm_testData =
 933 _T("162 Cult of the genius out of vanity.\97 Because we think well of ourselves, but ")
 934 _T("nonetheless never suppose ourselves capable of producing a painting like one of ")
 935 _T("Raphael's or a dramatic scene like one of Shakespeare's, we convince ourselves ")
 936 _T("that the capacity to do so is quite extraordinarily marvelous, a wholly ")
 937 _T("uncommon accident, or, if we are still religiously inclined, a mercy from on ")
 938 _T("high. Thus our vanity, our self-love, promotes the cult of the genius: for only ")
 939 _T("if we think of him as being very remote from us, as a miraculum, does he not ")
 940 _T("aggrieve us (even Goethe, who was without envy, called Shakespeare his star of ")
 941 _T("the most distant heights [\"William! Stern der schönsten Ferne\": from Goethe's, ")
 942 _T("\"Between Two Worlds\"]; in regard to which one might recall the lines: \"the ")
 943 _T("stars, these we do not desire\" [from Goethe's, \"Comfort in Tears\"]). But, aside ")
 944 _T("from these suggestions of our vanity, the activity of the genius seems in no ")
 945 _T("way fundamentally different from the activity of the inventor of machines, the ")
 946 _T("scholar of astronomy or history, the master of tactics. All these activities ")
 947 _T("are explicable if one pictures to oneself people whose thinking is active in ")
 948 _T("one direction, who employ everything as material, who always zealously observe ")
 949 _T("their own inner life and that of others, who perceive everywhere models and ")
 950 _T("incentives, who never tire of combining together the means available to them. ")
 951 _T("Genius too does nothing except learn first how to lay bricks then how to build, ")
 952 _T("except continually seek for material and continually form itself around it. ")
 953 _T("Every activity of man is amazingly complicated, not only that of the genius: ")
 954 _T("but none is a \"miracle.\"\97 Whence, then, the belief that genius exists only in ")
 955 _T("the artist, orator and philosopher? that only they have \"intuition\"? (Whereby ")
 956 _T("they are supposed to possess a kind of miraculous eyeglass with which they can ")
 957 _T("see directly into \"the essence of the thing\"!) It is clear that people speak of ")
 958 _T("genius only where the effects of the great intellect are most pleasant to them ")
 959 _T("and where they have no desire to feel envious. To call someone \"divine\" means: ")
 960 _T("\"here there is no need for us to compete.\" Then, everything finished and ")
 961 _T("complete is regarded with admiration, everything still becoming is undervalued. ")
 962 _T("But no one can see in the work of the artist how it has become; that is its ")
 963 _T("advantage, for wherever one can see the act of becoming one grows somewhat ")
 964 _T("cool. The finished and perfect art of representation repulses all thinking as ")
 965 _T("to how it has become; it tyrannizes as present completeness and perfection. ")
 966 _T("That is why the masters of the art of representation count above all as gifted ")
 967 _T("with genius and why men of science do not. In reality, this evaluation of the ")
 968 _T("former and undervaluation of the latter is only a piece of childishness in the ")
 969 _T("realm of reason. ")
 970 _T("\n\n")
 971 _T("163 The serious workman.\97 Do not talk about giftedness, inborn talents! One can ")
 972 _T("name great men of all kinds who were very little gifted. The acquired ")
 973 _T("greatness, became \"geniuses\" (as we put it), through qualities the lack of ")
 974 _T("which no one who knew what they were would boast of: they all possessed that ")
 975 _T("seriousness of the efficient workman which first learns to construct the parts ")
 976 _T("properly before it ventures to fashion a great whole; they allowed themselves ")
 977 _T("time for it, because they took more pleasure in making the little, secondary ")
 978 _T("things well than in the effect of a dazzling whole. the recipe for becoming a ")
 979 _T("good novelist, for example, is easy to give, but to carry it out presupposes ")
 980 _T("qualities one is accustomed to overlook when one says \"I do not have enough ")
 981 _T("talent.\" One has only to make a hundred or so sketches for novels, none longer ")
 982 _T("than two pages but of such distinctness that every word in them is necessary; ")
 983 _T("one should write down anecdotes each day until one has learned how to give them ")
 984 _T("the most pregnant and effective form; one should be tireless in collecting and ")
 985 _T("describing human types and characters; one should above all relate things to ")
 986 _T("others and listen to others relate, keeping one's eyes and ears open for the ")
 987 _T("effect produced on those present, one should travel like a landscape painter or ")
 988 _T("costume designer; one should excerpt for oneself out of the individual sciences ")
 989 _T("everything that will produce an artistic effect when it is well described, one ")
 990 _T("should, finally, reflect on the motives of human actions, disdain no signpost ")
 991 _T("to instruction about them and be a collector of these things by day and night. ")
 992 _T("One should continue in this many-sided exercise some ten years: what is then ")
 993 _T("created in the workshop, however, will be fit to go out into the world.\97 What, ")
 994 _T("however, do most people do? They begin, not with the parts, but with the whole. ")
 995 _T("Perhaps they chance to strike a right note, excite attention and from then on ")
 996 _T("strike worse and worse notes, for good, natural reasons.\97 Sometimes, when the ")
 997 _T("character and intellect needed to formulate such a life-plan are lacking, fate ")
 998 _T("and need take their place and lead the future master step by step through all ")
 999 _T("the stipulations of his trade. ")
1000 _T("\n\n")
1001 _T("164 Peril and profit in the cult of the genius.\97 The belief in great, superior, ")
1002 _T("fruitful spirits is not necessarily, yet nonetheless is very frequently ")
1003 _T("associated with that religious or semi-religious superstition that these ")
1004 _T("spirits are of supra-human origin and possess certain miraculous abilities by ")
1005 _T("virtue of which they acquire their knowledge by quite other means than the rest ")
1006 _T("of mankind. One ascribes to them, it seems, a direct view of the nature of the ")
1007 _T("world, as it were a hole in the cloak of appearance, and believes that, by ")
1008 _T("virtue of this miraculous seer's vision, they are able to communicate something ")
1009 _T("conclusive and decisive about man and the world without the toil and ")
1010 _T("rigorousness required by science. As long as there continue to be those who ")
1011 _T("believe in the miraculous in the domain of knowledge one can perhaps concede ")
1012 _T("that these people themselves derive some benefit from their belief, inasmuch as ")
1013 _T("through their unconditional subjection to the great spirits they create for ")
1014 _T("their own spirit during its time of development the finest form of discipline ")
1015 _T("and schooling. On the other hand, it is at least questionable whether the ")
1016 _T("superstitious belief in genius, in its privileges and special abilities, is of ")
1017 _T("benefit to the genius himself if it takes root in him. It is in any event a ")
1018 _T("dangerous sign when a man is assailed by awe of himself, whether it be the ")
1019 _T("celebrated Caesar's awe of Caesar or the awe of one's own genius now under ")
1020 _T("consideration; when the sacrificial incense which is properly rendered only to ")
1021 _T("a god penetrates the brain of the genius, so that his head begins to swim and ")
1022 _T("he comes to regard himself as something supra-human. The consequences that ")
1023 _T("slowly result are: the feeling of irresponsibility, of exceptional rights, the ")
1024 _T("belief that he confers a favor by his mere presence, insane rage when anyone ")
1025 _T("attempts even to compare him with others, let alone to rate him beneath them, ")
1026 _T("or to draw attention to lapses in his work. Because he ceases to practice ")
1027 _T("criticism of himself, at last one pinion after the other falls out of his ")
1028 _T("plumage: that superstitious eats at the roots of his powers and perhaps even ")
1029 _T("turns him into a hypocrite after his powers have fled from him. For the great ")
1030 _T("spirits themselves it is therefore probably more beneficial if they acquire an ")
1031 _T("insight into the nature and origin of their powers, if they grasp, that is to ")
1032 _T("say, what purely human qualities have come together in them and what fortunate ")
1033 _T("circumstances attended them: in the first place undiminished energy, resolute ")
1034 _T("application to individual goals, great personal courage, then the good fortune ")
1035 _T("to receive an upbringing which offered in the early years the finest teachers, ")
1036 _T("models and methods. To be sure, when their goal is the production of the ")
1037 _T("greatest possible effect, unclarity with regard to oneself and that ")
1038 _T("semi-insanity superadded to it has always achieved much; for what has been ")
1039 _T("admired and envied at all times has been that power in them by virtue of which ")
1040 _T("they render men will-less and sweep them away into the delusion that the ")
1041 _T("leaders they are following are supra-natural. Indeed, it elevates and inspires ")
1042 _T("men to believe that someone is in possession of supra-natural powers: to this ")
1043 _T("extent Plato was right to say [Plato: Phaedrus, 244a] that madness has brought ")
1044 _T("the greatest of blessings upon mankind.\97 In rare individual cases this portion ")
1045 _T("of madness may, indeed, actually have been the means by which such a nature, ")
1046 _T("excessive in all directions, was held firmly together: in the life of ")
1047 _T("individuals, too, illusions that are in themselves poisons often play the role ")
1048 _T("of healers; yet, in the end, in the case of every \"genius\" who believes in his ")
1049 _T("own divinity the poison shows itself to the same degree as his \"genius\" grows ")
1050 _T("old: one may recall, for example, the case of Napoleon, whose nature certainly ")
1051 _T("grew into the mighty unity that sets him apart from all men of modern times ")
1052 _T("precisely through his belief in himself and his star and through the contempt ")
1053 _T("for men that flowed from it; until in the end, however, this same belief went ")
1054 _T("over into an almost insane fatalism, robbed him of his acuteness and swiftness ")
1055 _T("of perception, and became the cause of his destruction.");