-/*
- * Program: scroll
- *
- * Author: Robert Roebling
- *
- * Copyright: (C) 1998, Robert Roebling
- *
- */
+/////////////////////////////////////////////////////////////////////////////
+// Name: scroll.cpp
+// Purpose: wxScrolledWindow sample
+// Author: Robert Roebling
+// Modified by:
+// Created:
+// RCS-ID: $Id$
+// Copyright: (C) 1998 Robert Roebling, 2002 Ron Lee, 2003 Matt Gregory
+// Licence: wxWindows license
+/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#include "wx/sizer.h"
#include "wx/log.h"
+const long ID_QUIT = wxID_EXIT;
+const long ID_ABOUT = wxID_ABOUT;
+const long ID_DELETE_ALL = 100;
+const long ID_INSERT_NEW = 101;
+
+// ----------------------------------------------------------------------
+// a trivial example
+// ----------------------------------------------------------------------
+
+class MySimpleFrame;
+class MySimpleCanvas;
+
+// MySimpleCanvas
+
+class MySimpleCanvas: public wxScrolledWindow
+{
+public:
+ MySimpleCanvas() { }
+ MySimpleCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
+
+ void OnPaint( wxPaintEvent &event );
+
+private:
+ DECLARE_DYNAMIC_CLASS(MyCanvas)
+ DECLARE_EVENT_TABLE()
+};
+
+IMPLEMENT_DYNAMIC_CLASS(MySimpleCanvas, wxScrolledWindow)
+
+BEGIN_EVENT_TABLE(MySimpleCanvas, wxScrolledWindow)
+ EVT_PAINT( MySimpleCanvas::OnPaint)
+END_EVENT_TABLE()
+
+MySimpleCanvas::MySimpleCanvas( wxWindow *parent, wxWindowID id,
+ const wxPoint &pos, const wxSize &size )
+ : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER, _T("test canvas") )
+{
+ SetScrollRate( 10, 10 );
+ SetVirtualSize( 92, 97 );
+ SetBackgroundColour( *wxWHITE );
+}
+
+void MySimpleCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
+{
+ wxPaintDC dc(this);
+ PrepareDC( dc );
+
+ dc.SetPen( *wxRED_PEN );
+ dc.SetBrush( *wxTRANSPARENT_BRUSH );
+ dc.DrawRectangle( 0,0,92,97 );
+}
+
+// MySimpleFrame
+
+class MySimpleFrame: public wxFrame
+{
+public:
+ MySimpleFrame();
+
+ void OnQuit( wxCommandEvent &event );
+
+ MySimpleCanvas *m_canvas;
+
+private:
+ DECLARE_DYNAMIC_CLASS(MySimpleFrame)
+ DECLARE_EVENT_TABLE()
+};
+
+
+IMPLEMENT_DYNAMIC_CLASS( MySimpleFrame, wxFrame )
+
+BEGIN_EVENT_TABLE(MySimpleFrame,wxFrame)
+ EVT_MENU (ID_QUIT, MySimpleFrame::OnQuit)
+END_EVENT_TABLE()
+
+MySimpleFrame::MySimpleFrame()
+ : wxFrame( (wxFrame *)NULL, wxID_ANY, _T("wxScrolledWindow sample"),
+ wxPoint(120,120), wxSize(150,150) )
+{
+ wxMenu *file_menu = new wxMenu();
+ file_menu->Append( ID_QUIT, _T("E&xit\tAlt-X"));
+
+ wxMenuBar *menu_bar = new wxMenuBar();
+ menu_bar->Append(file_menu, _T("&File"));
+
+ SetMenuBar( menu_bar );
+
+ m_canvas = new MySimpleCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(100,100) );
+}
+
+void MySimpleFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
+{
+ Close( true );
+}
+
+// ----------------------------------------------------------------------
+// a complex example
+// ----------------------------------------------------------------------
// derived classes
class MyCanvas: public wxScrolledWindow
{
public:
- MyCanvas() {};
+ MyCanvas() {}
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
- ~MyCanvas();
+ ~MyCanvas(){};
void OnPaint( wxPaintEvent &event );
void OnQueryPosition( wxCommandEvent &event );
void OnAddButton( wxCommandEvent &event );
void OnDeleteButton( wxCommandEvent &event );
void OnMoveButton( wxCommandEvent &event );
void OnScrollWin( wxCommandEvent &event );
- void OnMouseDown( wxMouseEvent &event );
+ void OnMouseRightDown( wxMouseEvent &event );
+ void OnMouseWheel( wxMouseEvent &event );
wxButton *m_button;
DECLARE_EVENT_TABLE()
};
+
+// ----------------------------------------------------------------------------
+// Autoscrolling example.
+// ----------------------------------------------------------------------------
+
+// this class uses the 'virtual' size attribute along with an internal
+// sizer to automatically set up scrollbars as needed
+
+class MyAutoScrollWindow : public wxScrolledWindow
+{
+private:
+
+ wxButton *m_button;
+
+public:
+
+ MyAutoScrollWindow( wxWindow *parent );
+
+ void OnResizeClick( wxCommandEvent &WXUNUSED( event ) );
+
+ DECLARE_EVENT_TABLE()
+};
+
+
+// ----------------------------------------------------------------------------
+// MyScrolledWindow classes: examples of wxScrolledWindow usage
+// ----------------------------------------------------------------------------
+
+// base class for both of them
+class MyScrolledWindowBase : public wxScrolledWindow
+{
+public:
+ MyScrolledWindowBase(wxWindow *parent)
+ : wxScrolledWindow(parent)
+ , m_nLines( 100 )
+ {
+ wxClientDC dc(this);
+ dc.GetTextExtent(_T("Line 17"), NULL, &m_hLine);
+ }
+
+protected:
+ // the height of one line on screen
+ wxCoord m_hLine;
+
+ // the number of lines we draw
+ size_t m_nLines;
+};
+
+// this class does "stupid" redrawing - it redraws everything each time
+// and sets the scrollbar extent directly.
+
+class MyScrolledWindowDumb : public MyScrolledWindowBase
+{
+public:
+ MyScrolledWindowDumb(wxWindow *parent) : MyScrolledWindowBase(parent)
+ {
+ // no horz scrolling
+ SetScrollbars(0, m_hLine, 0, m_nLines + 1, 0, 0, true /* no refresh */);
+ }
+
+ virtual void OnDraw(wxDC& dc);
+};
+
+// this class does "smart" redrawing - only redraws the lines which must be
+// redrawn and sets the scroll rate and virtual size to affect the
+// scrollbars.
+//
+// Note that this class should produce identical results to the one above.
+
+class MyScrolledWindowSmart : public MyScrolledWindowBase
+{
+public:
+ MyScrolledWindowSmart(wxWindow *parent) : MyScrolledWindowBase(parent)
+ {
+ // no horz scrolling
+ SetScrollRate( 0, m_hLine );
+ SetVirtualSize( wxDefaultCoord, ( m_nLines + 1 ) * m_hLine );
+ }
+
+ virtual void OnDraw(wxDC& dc);
+};
+
+// ----------------------------------------------------------------------------
+// MyAutoTimedScrollingWindow: implements a text viewer with simple blocksize
+// selection to test auto-scrolling functionality
+// ----------------------------------------------------------------------------
+
+class MyAutoTimedScrollingWindow : public wxScrolledWindow
+{
+protected: // member data
+ // test data variables
+ static const wxChar* sm_testData;
+ static const int sm_lineCnt; // line count
+ static const int sm_lineLen; // line length in characters
+ // sizes for graphical data
+ wxCoord m_fontH, m_fontW;
+ // selection tracking
+ wxPoint m_selStart; // beginning of blockwise selection
+ wxPoint m_cursor; // end of blockwise selection (mouse position)
+
+protected: // gui stuff
+ wxFont m_font;
+
+public: // interface
+ MyAutoTimedScrollingWindow( wxWindow* parent );
+ wxRect DeviceCoordsToGraphicalChars(wxRect updRect) const;
+ wxPoint DeviceCoordsToGraphicalChars(wxPoint pos) const;
+ wxPoint GraphicalCharToDeviceCoords(wxPoint pos) const;
+ wxRect LogicalCoordsToGraphicalChars(wxRect updRect) const;
+ wxPoint LogicalCoordsToGraphicalChars(wxPoint pos) const;
+ wxPoint GraphicalCharToLogicalCoords(wxPoint pos) const;
+ void MyRefresh();
+ bool IsSelected(int chX, int chY) const;
+ static bool IsInside(int k, int bound1, int bound2);
+ static wxRect DCNormalize(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
+
+protected: // event stuff
+ void OnDraw(wxDC& dc);
+ void OnMouseLeftDown(wxMouseEvent& event);
+ void OnMouseLeftUp(wxMouseEvent& event);
+ void OnMouseMove(wxMouseEvent& event);
+ void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
+ void OnScroll(wxScrollWinEvent& event);
+
+ DECLARE_EVENT_TABLE()
+};
+
+// ----------------------------------------------------------------------------
// MyFrame
+// ----------------------------------------------------------------------------
class MyFrame: public wxFrame
{
void OnAbout( wxCommandEvent &event );
void OnQuit( wxCommandEvent &event );
+ void OnDeleteAll( wxCommandEvent &event );
+ void OnInsertNew( wxCommandEvent &event );
MyCanvas *m_canvas;
wxTextCtrl *m_log;
DECLARE_EVENT_TABLE()
};
+// ----------------------------------------------------------------------------
// MyApp
+// ----------------------------------------------------------------------------
class MyApp: public wxApp
{
virtual bool OnInit();
};
+
+// ----------------------------------------------------------------------------
// main program
+// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
// ids
-#define ID_ADDBUTTON 1
-#define ID_DELBUTTON 2
-#define ID_MOVEBUTTON 3
-#define ID_SCROLLWIN 4
-#define ID_QUERYPOS 5
+const long ID_ADDBUTTON = wxNewId();
+const long ID_DELBUTTON = wxNewId();
+const long ID_MOVEBUTTON = wxNewId();
+const long ID_SCROLLWIN = wxNewId();
+const long ID_QUERYPOS = wxNewId();
-#define ID_NEWBUTTON 10
+const long ID_NEWBUTTON = wxNewId();
+// ----------------------------------------------------------------------------
// MyCanvas
+// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_PAINT( MyCanvas::OnPaint)
- EVT_LEFT_DOWN( MyCanvas::OnMouseDown)
+ EVT_RIGHT_DOWN( MyCanvas::OnMouseRightDown)
+ EVT_MOUSEWHEEL( MyCanvas::OnMouseWheel)
EVT_BUTTON( ID_QUERYPOS, MyCanvas::OnQueryPosition)
EVT_BUTTON( ID_ADDBUTTON, MyCanvas::OnAddButton)
EVT_BUTTON( ID_DELBUTTON, MyCanvas::OnDeleteButton)
MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
const wxPoint &pos, const wxSize &size )
- : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, "test canvas" )
+ : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, _T("test canvas") )
{
- (void) new wxButton( this, ID_ADDBUTTON, "add button", wxPoint(10,10) );
- (void) new wxButton( this, ID_DELBUTTON, "del button", wxPoint(10,40) );
- (void) new wxButton( this, ID_MOVEBUTTON, "move button", wxPoint(150,10) );
- (void) new wxButton( this, ID_SCROLLWIN, "scroll win", wxPoint(250,10) );
+ SetScrollRate( 10, 10 );
+ SetVirtualSize( 500, 1000 );
+
+ (void) new wxButton( this, ID_ADDBUTTON, _T("add button"), wxPoint(10,10) );
+ (void) new wxButton( this, ID_DELBUTTON, _T("del button"), wxPoint(10,40) );
+ (void) new wxButton( this, ID_MOVEBUTTON, _T("move button"), wxPoint(150,10) );
+ (void) new wxButton( this, ID_SCROLLWIN, _T("scroll win"), wxPoint(250,10) );
+
+#if 0
wxString choices[] =
{
"wonderful",
"examples."
};
-
+
m_button = new wxButton( this, ID_QUERYPOS, "Query position", wxPoint(10,110) );
-
- (void) new wxTextCtrl( this, -1, "wxTextCtrl", wxPoint(10,150) );
-
- (void) new wxRadioButton( this, -1, "Disable", wxPoint(10,190) );
-
- (void) new wxComboBox( this, -1, "This", wxPoint(10,230), wxDefaultSize, 5, choices );
-
- (void) new wxRadioBox( this, -1, "This", wxPoint(10,310), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_COLS );
- (void) new wxRadioBox( this, -1, "This", wxPoint(10,440), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_ROWS );
+ (void) new wxTextCtrl( this, wxID_ANY, "wxTextCtrl", wxPoint(10,150), wxSize(80,wxDefaultCoord) );
+
+ (void) new wxRadioButton( this, wxID_ANY, "Disable", wxPoint(10,190) );
+
+ (void) new wxComboBox( this, wxID_ANY, "This", wxPoint(10,230), wxDefaultSize, 5, choices );
+
+ (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,310), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_COLS );
+
+ (void) new wxRadioBox( this, wxID_ANY, "This", wxPoint(10,440), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_ROWS );
wxListCtrl *m_listCtrl = new wxListCtrl(
- this, -1, wxPoint(200, 110), wxSize(180, 120),
- wxLC_REPORT | wxSIMPLE_BORDER | wxLC_SINGLE_SEL );
+ this, wxID_ANY, wxPoint(200, 110), wxSize(180, 120),
+ wxLC_REPORT | wxSIMPLE_BORDER | wxLC_SINGLE_SEL );
m_listCtrl->InsertColumn(0, "First", wxLIST_FORMAT_LEFT, 90);
m_listCtrl->InsertColumn(1, "Last", wxLIST_FORMAT_LEFT, 90);
}
m_listCtrl->SetItemState( 3, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED );
- (void) new wxListBox( this, -1, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
+ (void) new wxListBox( this, wxID_ANY, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
+
+#endif
- wxWindow *test = new wxWindow( this, -1, wxPoint(10, 530), wxSize(130,120), wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( "WHEAT" );
- wxButton *test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
-
- test = new wxWindow( this, -1, wxPoint(160, 530), wxSize(130,120), wxSUNKEN_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( "WHEAT" );
+ wxPanel *test = new wxPanel( this, wxID_ANY, wxPoint(10, 110), wxSize(130,50), wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
+ test->SetBackgroundColour( wxT("WHEAT") );
+
+#if 0
+
+ wxButton *test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
+
+ test = new wxPanel( this, wxID_ANY, wxPoint(160, 530), wxSize(130,120), wxSUNKEN_BORDER | wxTAB_TRAVERSAL );
+ test->SetBackgroundColour( wxT("WHEAT") );
test->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
- test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
+ test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
test2->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
-
- test = new wxWindow( this, -1, wxPoint(310, 530), wxSize(130,120), wxRAISED_BORDER | wxTAB_TRAVERSAL );
- test->SetBackgroundColour( "WHEAT" );
+
+ test = new wxPanel( this, wxID_ANY, wxPoint(310, 530), wxSize(130,120), wxRAISED_BORDER | wxTAB_TRAVERSAL );
+ test->SetBackgroundColour( wxT("WHEAT") );
test->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
- test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
+ test2 = new wxButton( test, wxID_ANY, "Hallo", wxPoint(10,10) );
test2->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
- SetBackgroundColour( "WHEAT" );
-
+#endif
+
+ SetBackgroundColour( wxT("BLUE") );
+
SetCursor( wxCursor( wxCURSOR_IBEAM ) );
}
-MyCanvas::~MyCanvas()
+void MyCanvas::OnMouseRightDown( wxMouseEvent &event )
{
+ wxPoint pt( event.GetPosition() );
+ int x,y;
+ CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
+ wxLogMessage( wxT("Mouse down event at: %d %d, scrolled: %d %d"), pt.x, pt.y, x, y );
}
-void MyCanvas::OnMouseDown( wxMouseEvent &event )
+void MyCanvas::OnMouseWheel( wxMouseEvent &event )
{
wxPoint pt( event.GetPosition() );
int x,y;
CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
- wxLogMessage( "Mouse down event at: %d %d, scrolled: %d %d", pt.x, pt.y, x, y );
+ wxLogMessage( wxT("Mouse wheel event at: %d %d, scrolled: %d %d\n")
+ wxT("Rotation: %d, delta = %d"),
+ pt.x, pt.y, x, y,
+ event.GetWheelRotation(), event.GetWheelDelta() );
+
+ event.Skip();
}
void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
wxPaintDC dc( this );
PrepareDC( dc );
- dc.DrawText( "Press mouse button to test calculations!", 160, 50 );
+ dc.DrawText( _T("Press mouse button to test calculations!"), 160, 50 );
+
+ dc.DrawText( _T("Some text"), 140, 140 );
- dc.DrawText( "Some text", 140, 140 );
-
dc.DrawRectangle( 100, 160, 200, 200 );
}
void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) )
{
wxPoint pt( m_button->GetPosition() );
- wxLogMessage( "Position of ""Query position"" is %d %d", pt.x, pt.y );
+ wxLogMessage( wxT("Position of \"Query position\" is %d %d"), pt.x, pt.y );
pt = ClientToScreen( pt );
- wxLogMessage( "Position of ""Query position"" on screen is %d %d", pt.x, pt.y );
+ wxLogMessage( wxT("Position of \"Query position\" on screen is %d %d"), pt.x, pt.y );
}
void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( "Inserting button at position 10,70..." );
- wxButton *button = new wxButton( this, ID_NEWBUTTON, "new button", wxPoint(10,70), wxSize(80,25) );
+ wxLogMessage( wxT("Inserting button at position 10,70...") );
+ wxButton *button = new wxButton( this, ID_NEWBUTTON, wxT("new button"), wxPoint(10,70), wxSize(80,25) );
wxPoint pt( button->GetPosition() );
- wxLogMessage( "-> Position after inserting %d %d", pt.x, pt.y );
+ wxLogMessage( wxT("-> Position after inserting %d %d"), pt.x, pt.y );
}
-void MyCanvas::OnDeleteButton( wxCommandEvent &event )
+void MyCanvas::OnDeleteButton( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( "Deleting button inserted with ""Add button""..." );
+ wxLogMessage( wxT("Deleting button inserted with \"Add button\"...") );
wxWindow *win = FindWindow( ID_NEWBUTTON );
if (win)
win->Destroy();
else
- wxLogMessage( "-> No window with id = ID_NEWBUTTON found." );
+ wxLogMessage( wxT("-> No window with id = ID_NEWBUTTON found.") );
}
void MyCanvas::OnMoveButton( wxCommandEvent &event )
{
- wxLogMessage( "Moving button 10 pixels downward.." );
+ wxLogMessage( wxT("Moving button 10 pixels downward..") );
wxWindow *win = FindWindow( event.GetId() );
wxPoint pt( win->GetPosition() );
- wxLogMessage( "-> Position before move is %d %d", pt.x, pt.y );
- win->Move( -1, pt.y + 10 );
+ wxLogMessage( wxT("-> Position before move is %d %d"), pt.x, pt.y );
+ win->Move( wxDefaultCoord, pt.y + 10 );
pt = win->GetPosition();
- wxLogMessage( "-> Position after move is %d %d", pt.x, pt.y );
+ wxLogMessage( wxT("-> Position after move is %d %d"), pt.x, pt.y );
}
void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) )
{
- wxLogMessage( "Scrolling 2 units up.\nThe white square and the controls should move equally!" );
+ wxLogMessage( wxT("Scrolling 2 units up.\nThe white square and the controls should move equally!") );
int x,y;
- ViewStart( &x, &y );
- Scroll( -1, y+2 );
+ GetViewStart( &x, &y );
+ Scroll( wxDefaultCoord, y+2 );
}
-// MyFrame
+// ----------------------------------------------------------------------------
+// MyAutoScrollWindow
+// ----------------------------------------------------------------------------
+
+const long ID_RESIZEBUTTON = wxNewId();
+const wxSize SMALL_BUTTON( 100, 50 );
+const wxSize LARGE_BUTTON( 300, 100 );
-const int ID_QUIT = 108;
-const int ID_ABOUT = 109;
+BEGIN_EVENT_TABLE( MyAutoScrollWindow, wxScrolledWindow)
+ EVT_BUTTON( ID_RESIZEBUTTON, MyAutoScrollWindow::OnResizeClick)
+END_EVENT_TABLE()
+
+MyAutoScrollWindow::MyAutoScrollWindow( wxWindow *parent )
+ : wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize,
+ wxSUNKEN_BORDER|wxScrolledWindowStyle )
+{
+ SetBackgroundColour( wxT("GREEN") );
+
+ // Set the rate we'd like for scrolling.
+
+ SetScrollRate( 5, 5 );
+
+ // Populate a sizer with a 'resizing' button and some
+ // other static decoration
+
+ wxFlexGridSizer *innersizer = new wxFlexGridSizer( 2, 2 );
+
+ m_button = new wxButton( this,
+ ID_RESIZEBUTTON,
+ _T("Press me"),
+ wxDefaultPosition,
+ SMALL_BUTTON );
+
+ m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
+
+ innersizer->Add( m_button,
+ 0,
+ wxALIGN_CENTER | wxALL,
+ 20 );
+
+ innersizer->Add( new wxStaticText( this, wxID_ANY, _T("This is just") ),
+ 0,
+ wxALIGN_CENTER );
+
+ innersizer->Add( new wxStaticText( this, wxID_ANY, _T("some decoration") ),
+ 0,
+ wxALIGN_CENTER );
+
+ innersizer->Add( new wxStaticText( this, wxID_ANY, _T("for you to scroll...") ),
+ 0,
+ wxALIGN_CENTER );
+
+ // Then use the sizer to set the scrolled region size.
+
+ SetSizer( innersizer );
+}
+
+void MyAutoScrollWindow::OnResizeClick( wxCommandEvent &WXUNUSED( event ) )
+{
+ // Arbitrarily resize the button to change the minimum size of
+ // the (scrolled) sizer.
+
+ if( m_button->GetSize() == SMALL_BUTTON )
+ m_button->SetSizeHints( LARGE_BUTTON.GetWidth(), LARGE_BUTTON.GetHeight() );
+ else
+ m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() );
+
+ // Force update layout and scrollbars, since nothing we do here
+ // necessarily generates a size event which would do it for us.
+
+ FitInside();
+}
+
+// ----------------------------------------------------------------------------
+// MyFrame
+// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
BEGIN_EVENT_TABLE(MyFrame,wxFrame)
+ EVT_MENU (ID_DELETE_ALL, MyFrame::OnDeleteAll)
+ EVT_MENU (ID_INSERT_NEW, MyFrame::OnInsertNew)
EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
EVT_MENU (ID_QUIT, MyFrame::OnQuit)
END_EVENT_TABLE()
MyFrame::MyFrame()
- : wxFrame( (wxFrame *)NULL, -1, "wxScrolledWindow sample",
- wxPoint(20,20), wxSize(470,500) )
+ : wxFrame( (wxFrame *)NULL, wxID_ANY, _T("wxScrolledWindow sample"),
+ wxPoint(20,20), wxSize(800,500) )
{
wxMenu *file_menu = new wxMenu();
- file_menu->Append( ID_ABOUT, "&About..");
- file_menu->Append( ID_QUIT, "E&xit\tAlt-X");
+ file_menu->Append( ID_DELETE_ALL, _T("Delete all"));
+ file_menu->Append( ID_INSERT_NEW, _T("Insert new"));
+ file_menu->Append( ID_ABOUT, _T("&About.."));
+ file_menu->Append( ID_QUIT, _T("E&xit\tAlt-X"));
wxMenuBar *menu_bar = new wxMenuBar();
- menu_bar->Append(file_menu, "&File");
+ menu_bar->Append(file_menu, _T("&File"));
SetMenuBar( menu_bar );
+#if wxUSE_STATUSBAR
CreateStatusBar(2);
int widths[] = { -1, 100 };
SetStatusWidths( 2, widths );
+#endif // wxUSE_STATUSBAR
+
+ wxBoxSizer *topsizer = new wxBoxSizer( wxHORIZONTAL );
+ // subsizer splits topsizer down the middle
+ wxBoxSizer *subsizer = new wxBoxSizer( wxVERTICAL );
+
+ // Setting an explicit size here is superfluous, it will be overridden
+ // by the sizer in any case.
+ m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(100,100) );
+
+ // This is done with ScrollRate/VirtualSize in MyCanvas ctor now,
+ // both should produce identical results.
+ //m_canvas->SetScrollbars( 10, 10, 50, 100 );
+
+ subsizer->Add( m_canvas, 1, wxEXPAND );
+ subsizer->Add( new MyAutoScrollWindow( this ), 1, wxEXPAND );
+
+ wxSizer *sizerBtm = new wxBoxSizer(wxHORIZONTAL);
+ sizerBtm->Add( new MyScrolledWindowDumb(this), 1, wxEXPAND );
+ sizerBtm->Add( new MyScrolledWindowSmart(this), 1, wxEXPAND );
+ subsizer->Add( sizerBtm, 1, wxEXPAND );
+
+ topsizer->Add( subsizer, 1, wxEXPAND );
+ topsizer->Add( new MyAutoTimedScrollingWindow( this ), 1, wxEXPAND );
- m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(100,100) );
- m_canvas->SetScrollbars( 10, 10, 50, 100 );
-
- m_log = new wxTextCtrl( this, -1, "This is the log window.\n", wxPoint(0,0), wxSize(100,100), wxTE_MULTILINE );
- wxLog *old_log = wxLog::SetActiveTarget( new wxLogTextCtrl( m_log ) );
- delete old_log;
-
- wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
-
- topsizer->Add( m_canvas, 1, wxEXPAND );
- topsizer->Add( m_log, 0, wxEXPAND );
-
- SetAutoLayout( TRUE );
SetSizer( topsizer );
}
+void MyFrame::OnDeleteAll( wxCommandEvent &WXUNUSED(event) )
+{
+ m_canvas->DestroyChildren();
+}
+
+void MyFrame::OnInsertNew( wxCommandEvent &WXUNUSED(event) )
+{
+ (void)new wxButton( m_canvas, wxID_ANY, _T("Hello"), wxPoint(100,100) );
+}
+
void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
{
- Close( TRUE );
+ Close( true );
}
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
- (void)wxMessageBox( "wxScroll demo\n"
- "Robert Roebling (c) 1998",
- "About wxScroll Demo", wxICON_INFORMATION | wxOK );
+ (void)wxMessageBox( _T("wxScroll demo\n")
+ _T("Robert Roebling (c) 1998\n")
+ _T("Autoscrolling examples\n")
+ _T("Ron Lee (c) 2002\n")
+ _T("Auto-timed-scrolling example\n")
+ _T("Matt Gregory (c) 2003\n"),
+ _T("About wxScroll Demo"),
+ wxICON_INFORMATION | wxOK );
}
//-----------------------------------------------------------------------------
bool MyApp::OnInit()
{
- wxFrame *frame = new MyFrame();
- frame->Show( TRUE );
+ if ( !wxApp::OnInit() )
+ return false;
+
+ wxFrame *frame = new MyFrame();
+ frame->Show( true );
+
+ frame = new MySimpleFrame();
+ frame->Show();
+
+ return true;
+}
+
+// ----------------------------------------------------------------------------
+// MyScrolledWindowXXX
+// ----------------------------------------------------------------------------
+
+void MyScrolledWindowDumb::OnDraw(wxDC& dc)
+{
+ // this is useful to see which lines are redrawn
+ static size_t s_redrawCount = 0;
+ dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
- return TRUE;
+ wxCoord y = 0;
+ for ( size_t line = 0; line < m_nLines; line++ )
+ {
+ wxCoord yPhys;
+ CalcScrolledPosition(0, y, NULL, &yPhys);
+
+ dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
+ unsigned(line), y, yPhys), 0, y);
+ y += m_hLine;
+ }
+}
+
+void MyScrolledWindowSmart::OnDraw(wxDC& dc)
+{
+ // this is useful to see which lines are redrawn
+ static size_t s_redrawCount = 0;
+ dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
+
+ // update region is always in device coords, translate to logical ones
+ wxRect rectUpdate = GetUpdateRegion().GetBox();
+ CalcUnscrolledPosition(rectUpdate.x, rectUpdate.y,
+ &rectUpdate.x, &rectUpdate.y);
+
+ size_t lineFrom = rectUpdate.y / m_hLine,
+ lineTo = rectUpdate.GetBottom() / m_hLine;
+
+ if ( lineTo > m_nLines - 1)
+ lineTo = m_nLines - 1;
+
+ wxCoord y = lineFrom*m_hLine;
+ for ( size_t line = lineFrom; line <= lineTo; line++ )
+ {
+ wxCoord yPhys;
+ CalcScrolledPosition(0, y, NULL, &yPhys);
+
+ dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
+ unsigned(line), y, yPhys), 0, y);
+ y += m_hLine;
+ }
+}
+
+// ----------------------------------------------------------------------------
+// MyAutoTimedScrollingWindow
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(MyAutoTimedScrollingWindow, wxScrolledWindow)
+ EVT_LEFT_DOWN(MyAutoTimedScrollingWindow::OnMouseLeftDown)
+ EVT_LEFT_UP(MyAutoTimedScrollingWindow::OnMouseLeftUp)
+ EVT_MOTION(MyAutoTimedScrollingWindow::OnMouseMove)
+ EVT_MOUSE_CAPTURE_LOST(MyAutoTimedScrollingWindow::OnMouseCaptureLost)
+ EVT_SCROLLWIN(MyAutoTimedScrollingWindow::OnScroll)
+END_EVENT_TABLE()
+
+MyAutoTimedScrollingWindow::MyAutoTimedScrollingWindow(wxWindow* parent)
+ : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize
+ //, wxSUNKEN_BORDER) // can't seem to do it this way
+ , wxVSCROLL | wxHSCROLL | wxSUNKEN_BORDER)
+ , m_selStart(-1, -1), m_cursor(-1, -1)
+ , m_font(9, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL
+ , wxFONTWEIGHT_NORMAL)
+{
+ wxClientDC dc(this);
+ // query dc for text size
+ dc.SetFont(m_font);
+ dc.GetTextExtent(wxString(_T("A")), &m_fontW, &m_fontH);
+ // set up the virtual window
+ SetScrollbars(m_fontW, m_fontH, sm_lineLen, sm_lineCnt);
+}
+
+wxRect MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
+ (wxRect updRect) const
+{
+ wxPoint pos(updRect.GetPosition());
+ pos = DeviceCoordsToGraphicalChars(pos);
+ updRect.x = pos.x;
+ updRect.y = pos.y;
+ updRect.width /= m_fontW;
+ updRect.height /= m_fontH;
+ // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
+ // so an off-by-one correction is needed
+ ++updRect.width; // kludge
+ ++updRect.height; // kludge
+ return updRect;
+}
+
+wxPoint MyAutoTimedScrollingWindow::DeviceCoordsToGraphicalChars
+ (wxPoint pos) const
+{
+ pos.x /= m_fontW;
+ pos.y /= m_fontH;
+ int vX, vY;
+ GetViewStart(&vX, &vY);
+ pos.x += vX;
+ pos.y += vY;
+ return pos;
+}
+
+wxPoint MyAutoTimedScrollingWindow::GraphicalCharToDeviceCoords
+ (wxPoint pos) const
+{
+ int vX, vY;
+ GetViewStart(&vX, &vY);
+ pos.x -= vX;
+ pos.y -= vY;
+ pos.x *= m_fontW;
+ pos.y *= m_fontH;
+ return pos;
+}
+
+wxRect MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
+ (wxRect updRect) const
+{
+ wxPoint pos(updRect.GetPosition());
+ pos = LogicalCoordsToGraphicalChars(pos);
+ updRect.x = pos.x;
+ updRect.y = pos.y;
+ updRect.width /= m_fontW;
+ updRect.height /= m_fontH;
+ // the *CoordsToGraphicalChars() funcs round down to upper-left corner,
+ // so an off-by-one correction is needed
+ ++updRect.width; // kludge
+ ++updRect.height; // kludge
+ return updRect;
+}
+
+wxPoint MyAutoTimedScrollingWindow::LogicalCoordsToGraphicalChars
+ (wxPoint pos) const
+{
+ pos.x /= m_fontW;
+ pos.y /= m_fontH;
+ return pos;
+}
+
+wxPoint MyAutoTimedScrollingWindow::GraphicalCharToLogicalCoords
+ (wxPoint pos) const
+{
+ pos.x *= m_fontW;
+ pos.y *= m_fontH;
+ return pos;
+}
+
+void MyAutoTimedScrollingWindow::MyRefresh()
+{
+ static wxPoint lastSelStart(-1, -1), lastCursor(-1, -1);
+ // refresh last selected area (to deselect previously selected text)
+ wxRect lastUpdRect(
+ GraphicalCharToDeviceCoords(lastSelStart),
+ GraphicalCharToDeviceCoords(lastCursor)
+ );
+ // off-by-one corrections, necessary because it's not possible to know
+ // when to round up until rect is normalized by lastUpdRect constructor
+ lastUpdRect.width += m_fontW; // kludge
+ lastUpdRect.height += m_fontH; // kludge
+ // refresh currently selected (to select previously unselected text)
+ wxRect updRect(
+ GraphicalCharToDeviceCoords(m_selStart),
+ GraphicalCharToDeviceCoords(m_cursor)
+ );
+ // off-by-one corrections
+ updRect.width += m_fontW; // kludge
+ updRect.height += m_fontH; // kludge
+ // find necessary refresh areas
+ wxCoord rx = lastUpdRect.x;
+ wxCoord ry = lastUpdRect.y;
+ wxCoord rw = updRect.x - lastUpdRect.x;
+ wxCoord rh = lastUpdRect.height;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x;
+ ry = updRect.y + updRect.height;
+ rw= updRect.width;
+ rh = (lastUpdRect.y + lastUpdRect.height) - (updRect.y + updRect.height);
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x + updRect.width;
+ ry = lastUpdRect.y;
+ rw = (lastUpdRect.x + lastUpdRect.width) - (updRect.x + updRect.width);
+ rh = lastUpdRect.height;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ rx = updRect.x;
+ ry = lastUpdRect.y;
+ rw = updRect.width;
+ rh = updRect.y - lastUpdRect.y;
+ if (rw && rh) {
+ RefreshRect(DCNormalize(rx, ry, rw, rh));
+ }
+ // update last
+ lastSelStart = m_selStart;
+ lastCursor = m_cursor;
+}
+
+bool MyAutoTimedScrollingWindow::IsSelected(int chX, int chY) const
+{
+ if (IsInside(chX, m_selStart.x, m_cursor.x)
+ && IsInside(chY, m_selStart.y, m_cursor.y)) {
+ return true;
+ }
+ return false;
+}
+
+bool MyAutoTimedScrollingWindow::IsInside(int k, int bound1, int bound2)
+{
+ if ((k >= bound1 && k <= bound2) || (k >= bound2 && k <= bound1)) {
+ return true;
+ }
+ return false;
+}
+
+wxRect MyAutoTimedScrollingWindow::DCNormalize(wxCoord x, wxCoord y
+ , wxCoord w, wxCoord h)
+{
+ // this is needed to get rid of the graphical remnants from the selection
+ // I think it's because DrawRectangle() excludes a pixel in either direction
+ const int kludge = 1;
+ // make (x, y) the top-left corner
+ if (w < 0) {
+ w = -w + kludge;
+ x -= w;
+ } else {
+ x -= kludge;
+ w += kludge;
+ }
+ if (h < 0) {
+ h = -h + kludge;
+ y -= h;
+ } else {
+ y -= kludge;
+ h += kludge;
+ }
+ return wxRect(x, y, w, h);
+}
+
+void MyAutoTimedScrollingWindow::OnDraw(wxDC& dc)
+{
+ dc.SetFont(m_font);
+ wxBrush normBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)
+ , wxSOLID);
+ wxBrush selBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT)
+ , wxSOLID);
+ dc.SetPen(*wxTRANSPARENT_PEN);
+ wxString str = sm_testData;
+
+ // draw the characters
+ // 1. for each update region
+ for (wxRegionIterator upd(GetUpdateRegion()); upd; ++upd) {
+ wxRect updRect = upd.GetRect();
+ wxRect updRectInGChars(DeviceCoordsToGraphicalChars(updRect));
+ // 2. for each row of chars in the update region
+ for (int chY = updRectInGChars.y
+ ; chY <= updRectInGChars.y + updRectInGChars.height; ++chY) {
+ // 3. for each character in the row
+ for (int chX = updRectInGChars.x
+ ; chX <= updRectInGChars.x + updRectInGChars.width
+ ; ++chX) {
+ // 4. set up dc
+ if (IsSelected(chX, chY)) {
+ dc.SetBrush(selBrush);
+ dc.SetTextForeground( wxSystemSettings::GetColour
+ (wxSYS_COLOUR_HIGHLIGHTTEXT));
+ } else {
+ dc.SetBrush(normBrush);
+ dc.SetTextForeground( wxSystemSettings::GetColour
+ (wxSYS_COLOUR_WINDOWTEXT));
+ }
+ // 5. find position info
+ wxPoint charPos = GraphicalCharToLogicalCoords(wxPoint
+ (chX, chY));
+ // 6. draw!
+ dc.DrawRectangle(charPos.x, charPos.y, m_fontW, m_fontH);
+ size_t charIndex = chY * sm_lineLen + chX;
+ if (chY < sm_lineCnt &&
+ chX < sm_lineLen &&
+ charIndex < str.Length())
+ {
+ dc.DrawText(str.Mid(charIndex,1),
+ charPos.x, charPos.y);
+ }
+ }
+ }
+ }
+}
+
+void MyAutoTimedScrollingWindow::OnMouseLeftDown(wxMouseEvent& event)
+{
+ // initial press of mouse button sets the beginning of the selection
+ m_selStart = DeviceCoordsToGraphicalChars(event.GetPosition());
+ // set the cursor to the same position
+ m_cursor = m_selStart;
+ // draw/erase selection
+ MyRefresh();
+}
+
+void MyAutoTimedScrollingWindow::OnMouseLeftUp(wxMouseEvent& WXUNUSED(event))
+{
+ // this test is necessary
+ if (HasCapture()) {
+ // uncapture mouse
+ ReleaseMouse();
+ }
+}
+
+void MyAutoTimedScrollingWindow::OnMouseMove(wxMouseEvent& event)
+{
+ // if user is dragging
+ if (event.Dragging() && event.LeftIsDown()) {
+ // set the new cursor position
+ m_cursor = DeviceCoordsToGraphicalChars(event.GetPosition());
+ // draw/erase selection
+ MyRefresh();
+ // capture mouse to activate auto-scrolling
+ if (!HasCapture()) {
+ CaptureMouse();
+ }
+ }
+}
+
+void MyAutoTimedScrollingWindow::OnMouseCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
+{
+ // we only capture mouse for timed scrolling, so nothing is needed here
+ // other than making sure to not call event.Skip()
+}
+
+void MyAutoTimedScrollingWindow::OnScroll(wxScrollWinEvent& event)
+{
+ // need to move the cursor when autoscrolling
+ // FIXME: the cursor also moves when the scrollbar arrows are clicked
+ if (HasCapture()) {
+ if (event.GetOrientation() == wxHORIZONTAL) {
+ if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
+ --m_cursor.x;
+ } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
+ ++m_cursor.x;
+ }
+ } else if (event.GetOrientation() == wxVERTICAL) {
+ if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) {
+ --m_cursor.y;
+ } else if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) {
+ ++m_cursor.y;
+ }
+ }
+ }
+ MyRefresh();
+ event.Skip();
}
+const int MyAutoTimedScrollingWindow::sm_lineCnt = 125;
+const int MyAutoTimedScrollingWindow::sm_lineLen = 79;
+const wxChar* MyAutoTimedScrollingWindow::sm_testData =
+_T("162 Cult of the genius out of vanity. Because we think well of ourselves, but ")
+_T("nonetheless never suppose ourselves capable of producing a painting like one of ")
+_T("Raphael's or a dramatic scene like one of Shakespeare's, we convince ourselves ")
+_T("that the capacity to do so is quite extraordinarily marvelous, a wholly ")
+_T("uncommon accident, or, if we are still religiously inclined, a mercy from on ")
+_T("high. Thus our vanity, our self-love, promotes the cult of the genius: for only ")
+_T("if we think of him as being very remote from us, as a miraculum, does he not ")
+_T("aggrieve us (even Goethe, who was without envy, called Shakespeare his star of ")
+_T("the most distant heights [\"William! Stern der schonsten Ferne\": from Goethe's, ")
+_T("\"Between Two Worlds\"]; in regard to which one might recall the lines: \"the ")
+_T("stars, these we do not desire\" [from Goethe's, \"Comfort in Tears\"]). But, aside ")
+_T("from these suggestions of our vanity, the activity of the genius seems in no ")
+_T("way fundamentally different from the activity of the inventor of machines, the ")
+_T("scholar of astronomy or history, the master of tactics. All these activities ")
+_T("are explicable if one pictures to oneself people whose thinking is active in ")
+_T("one direction, who employ everything as material, who always zealously observe ")
+_T("their own inner life and that of others, who perceive everywhere models and ")
+_T("incentives, who never tire of combining together the means available to them. ")
+_T("Genius too does nothing except learn first how to lay bricks then how to build, ")
+_T("except continually seek for material and continually form itself around it. ")
+_T("Every activity of man is amazingly complicated, not only that of the genius: ")
+_T("but none is a \"miracle.\" Whence, then, the belief that genius exists only in ")
+_T("the artist, orator and philosopher? that only they have \"intuition\"? (Whereby ")
+_T("they are supposed to possess a kind of miraculous eyeglass with which they can ")
+_T("see directly into \"the essence of the thing\"!) It is clear that people speak of ")
+_T("genius only where the effects of the great intellect are most pleasant to them ")
+_T("and where they have no desire to feel envious. To call someone \"divine\" means: ")
+_T("\"here there is no need for us to compete.\" Then, everything finished and ")
+_T("complete is regarded with admiration, everything still becoming is undervalued. ")
+_T("But no one can see in the work of the artist how it has become; that is its ")
+_T("advantage, for wherever one can see the act of becoming one grows somewhat ")
+_T("cool. The finished and perfect art of representation repulses all thinking as ")
+_T("to how it has become; it tyrannizes as present completeness and perfection. ")
+_T("That is why the masters of the art of representation count above all as gifted ")
+_T("with genius and why men of science do not. In reality, this evaluation of the ")
+_T("former and undervaluation of the latter is only a piece of childishness in the ")
+_T("realm of reason. ")
+_T("\n\n")
+_T("163 The serious workman. Do not talk about giftedness, inborn talents! One can ")
+_T("name great men of all kinds who were very little gifted. The acquired ")
+_T("greatness, became \"geniuses\" (as we put it), through qualities the lack of ")
+_T("which no one who knew what they were would boast of: they all possessed that ")
+_T("seriousness of the efficient workman which first learns to construct the parts ")
+_T("properly before it ventures to fashion a great whole; they allowed themselves ")
+_T("time for it, because they took more pleasure in making the little, secondary ")
+_T("things well than in the effect of a dazzling whole. the recipe for becoming a ")
+_T("good novelist, for example, is easy to give, but to carry it out presupposes ")
+_T("qualities one is accustomed to overlook when one says \"I do not have enough ")
+_T("talent.\" One has only to make a hundred or so sketches for novels, none longer ")
+_T("than two pages but of such distinctness that every word in them is necessary; ")
+_T("one should write down anecdotes each day until one has learned how to give them ")
+_T("the most pregnant and effective form; one should be tireless in collecting and ")
+_T("describing human types and characters; one should above all relate things to ")
+_T("others and listen to others relate, keeping one's eyes and ears open for the ")
+_T("effect produced on those present, one should travel like a landscape painter or ")
+_T("costume designer; one should excerpt for oneself out of the individual sciences ")
+_T("everything that will produce an artistic effect when it is well described, one ")
+_T("should, finally, reflect on the motives of human actions, disdain no signpost ")
+_T("to instruction about them and be a collector of these things by day and night. ")
+_T("One should continue in this many-sided exercise some ten years: what is then ")
+_T("created in the workshop, however, will be fit to go out into the world. What, ")
+_T("however, do most people do? They begin, not with the parts, but with the whole. ")
+_T("Perhaps they chance to strike a right note, excite attention and from then on ")
+_T("strike worse and worse notes, for good, natural reasons. Sometimes, when the ")
+_T("character and intellect needed to formulate such a life-plan are lacking, fate ")
+_T("and need take their place and lead the future master step by step through all ")
+_T("the stipulations of his trade. ")
+_T("\n\n")
+_T("164 Peril and profit in the cult of the genius. The belief in great, superior, ")
+_T("fruitful spirits is not necessarily, yet nonetheless is very frequently ")
+_T("associated with that religious or semi-religious superstition that these ")
+_T("spirits are of supra-human origin and possess certain miraculous abilities by ")
+_T("virtue of which they acquire their knowledge by quite other means than the rest ")
+_T("of mankind. One ascribes to them, it seems, a direct view of the nature of the ")
+_T("world, as it were a hole in the cloak of appearance, and believes that, by ")
+_T("virtue of this miraculous seer's vision, they are able to communicate something ")
+_T("conclusive and decisive about man and the world without the toil and ")
+_T("rigorousness required by science. As long as there continue to be those who ")
+_T("believe in the miraculous in the domain of knowledge one can perhaps concede ")
+_T("that these people themselves derive some benefit from their belief, inasmuch as ")
+_T("through their unconditional subjection to the great spirits they create for ")
+_T("their own spirit during its time of development the finest form of discipline ")
+_T("and schooling. On the other hand, it is at least questionable whether the ")
+_T("superstitious belief in genius, in its privileges and special abilities, is of ")
+_T("benefit to the genius himself if it takes root in him. It is in any event a ")
+_T("dangerous sign when a man is assailed by awe of himself, whether it be the ")
+_T("celebrated Caesar's awe of Caesar or the awe of one's own genius now under ")
+_T("consideration; when the sacrificial incense which is properly rendered only to ")
+_T("a god penetrates the brain of the genius, so that his head begins to swim and ")
+_T("he comes to regard himself as something supra-human. The consequences that ")
+_T("slowly result are: the feeling of irresponsibility, of exceptional rights, the ")
+_T("belief that he confers a favor by his mere presence, insane rage when anyone ")
+_T("attempts even to compare him with others, let alone to rate him beneath them, ")
+_T("or to draw attention to lapses in his work. Because he ceases to practice ")
+_T("criticism of himself, at last one pinion after the other falls out of his ")
+_T("plumage: that superstitious eats at the roots of his powers and perhaps even ")
+_T("turns him into a hypocrite after his powers have fled from him. For the great ")
+_T("spirits themselves it is therefore probably more beneficial if they acquire an ")
+_T("insight into the nature and origin of their powers, if they grasp, that is to ")
+_T("say, what purely human qualities have come together in them and what fortunate ")
+_T("circumstances attended them: in the first place undiminished energy, resolute ")
+_T("application to individual goals, great personal courage, then the good fortune ")
+_T("to receive an upbringing which offered in the early years the finest teachers, ")
+_T("models and methods. To be sure, when their goal is the production of the ")
+_T("greatest possible effect, unclarity with regard to oneself and that ")
+_T("semi-insanity superadded to it has always achieved much; for what has been ")
+_T("admired and envied at all times has been that power in them by virtue of which ")
+_T("they render men will-less and sweep them away into the delusion that the ")
+_T("leaders they are following are supra-natural. Indeed, it elevates and inspires ")
+_T("men to believe that someone is in possession of supra-natural powers: to this ")
+_T("extent Plato was right to say [Plato: Phaedrus, 244a] that madness has brought ")
+_T("the greatest of blessings upon mankind. In rare individual cases this portion ")
+_T("of madness may, indeed, actually have been the means by which such a nature, ")
+_T("excessive in all directions, was held firmly together: in the life of ")
+_T("individuals, too, illusions that are in themselves poisons often play the role ")
+_T("of healers; yet, in the end, in the case of every \"genius\" who believes in his ")
+_T("own divinity the poison shows itself to the same degree as his \"genius\" grows ")
+_T("old: one may recall, for example, the case of Napoleon, whose nature certainly ")
+_T("grew into the mighty unity that sets him apart from all men of modern times ")
+_T("precisely through his belief in himself and his star and through the contempt ")
+_T("for men that flowed from it; until in the end, however, this same belief went ")
+_T("over into an almost insane fatalism, robbed him of his acuteness and swiftness ")
+_T("of perception, and became the cause of his destruction.");
projects / wxWidgets.git / blobdiff