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wxWidgets/samples/scroll/scroll.cpp

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/////////////////////////////////////////////////////////////////////////////
// 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"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/image.h"
#include "wx/listctrl.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 MyFrame;
class MyApp;
// MyCanvas
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas() {}
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
~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 OnMouseRightDown( wxMouseEvent &event );
void OnMouseWheel( wxMouseEvent &event );
wxButton *m_button;
DECLARE_DYNAMIC_CLASS(MyCanvas)
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
{
public:
MyFrame();
void OnAbout( wxCommandEvent &event );
void OnQuit( wxCommandEvent &event );
void OnDeleteAll( wxCommandEvent &event );
void OnInsertNew( wxCommandEvent &event );
MyCanvas *m_canvas;
wxTextCtrl *m_log;
DECLARE_DYNAMIC_CLASS(MyFrame)
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
class MyApp: public wxApp
{
public:
virtual bool OnInit();
};
// ----------------------------------------------------------------------------
// main program
// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
// ids
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();
const long ID_NEWBUTTON = wxNewId();
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_PAINT( MyCanvas::OnPaint)
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)
EVT_BUTTON( ID_MOVEBUTTON, MyCanvas::OnMoveButton)
EVT_BUTTON( ID_SCROLLWIN, MyCanvas::OnScrollWin)
END_EVENT_TABLE()
MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
const wxPoint &pos, const wxSize &size )
: wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, _T("test canvas") )
{
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[] =
{
"This",
"is one of my",
"really",
"wonderful",
"examples."
};
m_button = new wxButton( this, ID_QUERYPOS, "Query position", wxPoint(10,110) );
(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, 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);
for ( int i=0; i < 30; i++)
{
char buf[20];
sprintf(buf, "Item %d", i);
m_listCtrl->InsertItem(i, buf);
}
m_listCtrl->SetItemState( 3, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED );
(void) new wxListBox( this, wxID_ANY, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
#endif
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, wxID_ANY, "Hallo", wxPoint(10,10) );
test2->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
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, wxID_ANY, "Hallo", wxPoint(10,10) );
test2->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
#endif
SetBackgroundColour( wxT("BLUE") );
SetCursor( wxCursor( wxCURSOR_IBEAM ) );
}
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::OnMouseWheel( wxMouseEvent &event )
{
wxPoint pt( event.GetPosition() );
int x,y;
CalcUnscrolledPosition( 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( _T("Press mouse button to test calculations!"), 160, 50 );
dc.DrawText( _T("Some text"), 140, 140 );
dc.DrawRectangle( 100, 160, 200, 200 );
}
void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) )
{
wxPoint pt( m_button->GetPosition() );
wxLogMessage( wxT("Position of \"Query position\" is %d %d"), pt.x, pt.y );
pt = ClientToScreen( pt );
wxLogMessage( wxT("Position of \"Query position\" on screen is %d %d"), pt.x, pt.y );
}
void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) )
{
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( wxT("-> Position after inserting %d %d"), pt.x, pt.y );
}
void MyCanvas::OnDeleteButton( wxCommandEvent &WXUNUSED(event) )
{
wxLogMessage( wxT("Deleting button inserted with \"Add button\"...") );
wxWindow *win = FindWindow( ID_NEWBUTTON );
if (win)
win->Destroy();
else
wxLogMessage( wxT("-> No window with id = ID_NEWBUTTON found.") );
}
void MyCanvas::OnMoveButton( wxCommandEvent &event )
{
wxLogMessage( wxT("Moving button 10 pixels downward..") );
wxWindow *win = FindWindow( event.GetId() );
wxPoint pt( win->GetPosition() );
wxLogMessage( wxT("-> Position before move is %d %d"), pt.x, pt.y );
win->Move( wxDefaultCoord, pt.y + 10 );
pt = win->GetPosition();
wxLogMessage( wxT("-> Position after move is %d %d"), pt.x, pt.y );
}
void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) )
{
wxLogMessage( wxT("Scrolling 2 units up.\nThe white square and the controls should move equally!") );
int x,y;
GetViewStart( &x, &y );
Scroll( wxDefaultCoord, y+2 );
}
// ----------------------------------------------------------------------------
// MyAutoScrollWindow
// ----------------------------------------------------------------------------
const long ID_RESIZEBUTTON = wxNewId();
const wxSize SMALL_BUTTON( 100, 50 );
const wxSize LARGE_BUTTON( 300, 100 );
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, wxID_ANY, _T("wxScrolledWindow sample"),
wxPoint(20,20), wxSize(800,500) )
{
wxMenu *file_menu = new wxMenu();
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, _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 );
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 );
}
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
(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 );
}
//-----------------------------------------------------------------------------
// MyApp
//-----------------------------------------------------------------------------
bool MyApp::OnInit()
{
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);
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);
const wxString str = sm_testData;
size_t strLength = str.length();
wxString::const_iterator str_i;
// 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
bool isFirstX = true;
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 < strLength)
{
if (isFirstX)
{
str_i = str.begin() + charIndex;
isFirstX = false;
}
dc.DrawText(*str_i, charPos.x, charPos.y);
++str_i;
}
}
}
}
}
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.");
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