///////////////////////////////////////////////////////////////////////////// // 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" // 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 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 ); // We need to do this here, because wxADJUST_MINSIZE below // will cause the initial size to be ignored for Best/Min size. // It would be nice to fix the sizers to handle this a little // more cleanly. m_button->SetSizeHints( SMALL_BUTTON.GetWidth(), SMALL_BUTTON.GetHeight() ); innersizer->Add( m_button, 0, wxALIGN_CENTER | wxALL | wxADJUST_MINSIZE, 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 // ---------------------------------------------------------------------------- const long ID_QUIT = wxID_EXIT; const long ID_ABOUT = wxID_ABOUT; const long ID_DELETE_ALL = 100; const long ID_INSERT_NEW = 101; 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() { wxFrame *frame = new MyFrame(); frame->Show( true ); 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)"), 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)"), 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_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::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.");