X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2480be69b159027a3673eee1a4fc4e16287d058d..f321d0bc0caf4d78ccc5426e926fc25c46297439:/demos/life/life.cpp diff --git a/demos/life/life.cpp b/demos/life/life.cpp index d03ad5e579..39d74b2d2f 100644 --- a/demos/life/life.cpp +++ b/demos/life/life.cpp @@ -1,6 +1,6 @@ ///////////////////////////////////////////////////////////////////////////// // Name: life.cpp -// Purpose: The game of life, created by J. H. Conway +// Purpose: The game of Life, created by J. H. Conway // Author: Guillermo Rodriguez Garcia, // Modified by: // Created: Jan/2000 @@ -10,126 +10,169 @@ ///////////////////////////////////////////////////////////////////////////// // ========================================================================== -// declarations +// headers, declarations, constants // ========================================================================== -// -------------------------------------------------------------------------- -// headers -// -------------------------------------------------------------------------- - -#ifdef __GNUG__ - #pragma implementation "life.h" -#endif - -// for compilers that support precompilation, includes "wx/wx.h" +// For compilers that support precompilation, includes "wx/wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif -// for all others, include the necessary headers #ifndef WX_PRECOMP #include "wx/wx.h" #endif #include "wx/statline.h" +#include "wx/wfstream.h" +#include "wx/filedlg.h" +#include "wx/stockitem.h" #include "life.h" #include "game.h" #include "dialogs.h" +#include "reader.h" // -------------------------------------------------------------------------- // resources // -------------------------------------------------------------------------- -#if defined(__WXGTK__) || defined(__WXMOTIF__) - // the application icon +#ifndef wxHAS_IMAGES_IN_RESOURCES + // application icon #include "mondrian.xpm" // bitmap buttons for the toolbar #include "bitmaps/reset.xpm" + #include "bitmaps/open.xpm" #include "bitmaps/play.xpm" #include "bitmaps/stop.xpm" + #include "bitmaps/zoomin.xpm" + #include "bitmaps/zoomout.xpm" + #include "bitmaps/info.xpm" + + // navigator + #include "bitmaps/north.xpm" + #include "bitmaps/south.xpm" + #include "bitmaps/east.xpm" + #include "bitmaps/west.xpm" + #include "bitmaps/center.xpm" #endif // -------------------------------------------------------------------------- // constants // -------------------------------------------------------------------------- -// IDs for the controls and the menu commands +// IDs for the controls and the menu commands. Exluding those already defined +// by wxWidgets, such as wxID_NEW. enum { - // menu items and toolbar buttons - ID_NEWGAME = 1001, + // timer + ID_TIMER = wxID_HIGHEST, + + // file menu ID_SAMPLES, - ID_ABOUT, - ID_EXIT, - ID_CLEAR, + + // view menu + ID_SHOWNAV, + ID_ORIGIN, + ID_CENTER, + ID_NORTH, + ID_SOUTH, + ID_EAST, + ID_WEST, + ID_INFO, + + // game menu ID_START, ID_STEP, - ID_STOP, - ID_WRAP, + ID_TOPSPEED, // speed selection slider ID_SLIDER }; // -------------------------------------------------------------------------- -// event tables and other macros for wxWindows +// event tables and other macros for wxWidgets // -------------------------------------------------------------------------- // Event tables BEGIN_EVENT_TABLE(LifeFrame, wxFrame) - EVT_MENU (ID_NEWGAME, LifeFrame::OnNewGame) - EVT_MENU (ID_SAMPLES, LifeFrame::OnSamples) - EVT_MENU (ID_ABOUT, LifeFrame::OnMenu) - EVT_MENU (ID_EXIT, LifeFrame::OnMenu) - EVT_MENU (ID_CLEAR, LifeFrame::OnMenu) - EVT_MENU (ID_START, LifeFrame::OnMenu) - EVT_MENU (ID_STEP, LifeFrame::OnMenu) - EVT_MENU (ID_STOP, LifeFrame::OnMenu) - EVT_MENU (ID_WRAP, LifeFrame::OnMenu) - EVT_COMMAND_SCROLL (ID_SLIDER, LifeFrame::OnSlider) + EVT_MENU (wxID_NEW, LifeFrame::OnMenu) +#if wxUSE_FILEDLG + EVT_MENU (wxID_OPEN, LifeFrame::OnOpen) +#endif + EVT_MENU (ID_SAMPLES, LifeFrame::OnSamples) + EVT_MENU (wxID_ABOUT, LifeFrame::OnMenu) + EVT_MENU (wxID_EXIT, LifeFrame::OnMenu) + EVT_MENU (ID_SHOWNAV, LifeFrame::OnMenu) + EVT_MENU (ID_ORIGIN, LifeFrame::OnNavigate) + EVT_BUTTON (ID_CENTER, LifeFrame::OnNavigate) + EVT_BUTTON (ID_NORTH, LifeFrame::OnNavigate) + EVT_BUTTON (ID_SOUTH, LifeFrame::OnNavigate) + EVT_BUTTON (ID_EAST, LifeFrame::OnNavigate) + EVT_BUTTON (ID_WEST, LifeFrame::OnNavigate) + EVT_MENU (wxID_ZOOM_IN, LifeFrame::OnZoom) + EVT_MENU (wxID_ZOOM_OUT,LifeFrame::OnZoom) + EVT_MENU (ID_INFO, LifeFrame::OnMenu) + EVT_MENU (ID_START, LifeFrame::OnMenu) + EVT_MENU (ID_STEP, LifeFrame::OnMenu) + EVT_MENU (wxID_STOP, LifeFrame::OnMenu) + EVT_MENU (ID_TOPSPEED, LifeFrame::OnMenu) + EVT_COMMAND_SCROLL (ID_SLIDER, LifeFrame::OnSlider) + EVT_TIMER (ID_TIMER, LifeFrame::OnTimer) + EVT_CLOSE ( LifeFrame::OnClose) +END_EVENT_TABLE() + +BEGIN_EVENT_TABLE(LifeNavigator, wxMiniFrame) + EVT_CLOSE ( LifeNavigator::OnClose) END_EVENT_TABLE() -BEGIN_EVENT_TABLE(LifeCanvas, wxScrolledWindow) - EVT_PAINT ( LifeCanvas::OnPaint) - EVT_SIZE ( LifeCanvas::OnSize) - EVT_MOUSE_EVENTS ( LifeCanvas::OnMouse) +BEGIN_EVENT_TABLE(LifeCanvas, wxWindow) + EVT_PAINT ( LifeCanvas::OnPaint) + EVT_SCROLLWIN ( LifeCanvas::OnScroll) + EVT_SIZE ( LifeCanvas::OnSize) + EVT_MOTION ( LifeCanvas::OnMouse) + EVT_LEFT_DOWN ( LifeCanvas::OnMouse) + EVT_LEFT_UP ( LifeCanvas::OnMouse) + EVT_LEFT_DCLICK ( LifeCanvas::OnMouse) + EVT_ERASE_BACKGROUND( LifeCanvas::OnEraseBackground) END_EVENT_TABLE() // Create a new application object IMPLEMENT_APP(LifeApp) + // ========================================================================== // implementation // ========================================================================== // some shortcuts -#define ADD_TOOL(a, b, c, d) \ - toolBar->AddTool(a, b, wxNullBitmap, FALSE, -1, -1, (wxObject *)0, c, d) +#define ADD_TOOL(id, bmp, tooltip, help) \ + toolBar->AddTool(id, wxEmptyString, bmp, wxNullBitmap, wxITEM_NORMAL, tooltip, help) -#define GET_FRAME() \ - ((LifeFrame *) wxGetApp().GetTopWindow()) // -------------------------------------------------------------------------- // LifeApp // -------------------------------------------------------------------------- -// `Main program' equivalent: the program execution "starts" here +// 'Main program' equivalent: the program execution "starts" here bool LifeApp::OnInit() { // create the main application window LifeFrame *frame = new LifeFrame(); - // show it and tell the application that it's our main window - frame->Show(TRUE); - SetTopWindow(frame); + // show it + frame->Show(true); + + // just for Motif +#ifdef __WXMOTIF__ + frame->UpdateInfoText(); +#endif // enter the main message loop and run the app - return TRUE; + return true; } // -------------------------------------------------------------------------- @@ -137,180 +180,304 @@ bool LifeApp::OnInit() // -------------------------------------------------------------------------- // frame constructor -LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(50, 50)) +LifeFrame::LifeFrame() : + wxFrame( (wxFrame *) NULL, wxID_ANY, _("Life!"), wxDefaultPosition ), + m_navigator(NULL) { // frame icon SetIcon(wxICON(mondrian)); // menu bar - wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF); - wxMenu *menuGame = new wxMenu("", wxMENU_TEAROFF); - - menuFile->Append(ID_NEWGAME, _("New game..."), _("Start a new game")); - menuFile->Append(ID_SAMPLES, _("Sample game..."), _("Select a sample configuration")); - menuFile->AppendSeparator(); - menuFile->Append(ID_ABOUT, _("&About...\tCtrl-A"), _("Show about dialog")); + wxMenu *menuFile = new wxMenu(wxMENU_TEAROFF); + wxMenu *menuView = new wxMenu(wxMENU_TEAROFF); + wxMenu *menuGame = new wxMenu(wxMENU_TEAROFF); + wxMenu *menuHelp = new wxMenu(wxMENU_TEAROFF); + + menuFile->Append(wxID_NEW, wxEmptyString, _("Start a new game")); +#if wxUSE_FILEDLG + menuFile->Append(wxID_OPEN, wxEmptyString, _("Open an existing Life pattern")); +#endif + menuFile->Append(ID_SAMPLES, _("&Sample game..."), _("Select a sample configuration")); +#if ! (defined(__SMARTPHONE__) || defined(__POCKETPC__)) menuFile->AppendSeparator(); - menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program")); + menuFile->Append(wxID_EXIT); + + menuView->Append(ID_SHOWNAV, _("Navigation &toolbox"), _("Show or hide toolbox"), wxITEM_CHECK); + menuView->Check(ID_SHOWNAV, true); + menuView->AppendSeparator(); +#endif + + menuView->Append(ID_ORIGIN, _("&Absolute origin"), _("Go to (0, 0)")); + menuView->Append(ID_CENTER, _("&Center of mass"), _("Find center of mass")); + menuView->Append(ID_NORTH, _("&North"), _("Find northernmost cell")); + menuView->Append(ID_SOUTH, _("&South"), _("Find southernmost cell")); + menuView->Append(ID_EAST, _("&East"), _("Find easternmost cell")); + menuView->Append(ID_WEST, _("&West"), _("Find westernmost cell")); + menuView->AppendSeparator(); + menuView->Append(wxID_ZOOM_IN, wxEmptyString, _("Zoom in")); + menuView->Append(wxID_ZOOM_OUT, wxEmptyString, _("Zoom out")); + menuView->Append(ID_INFO, _("&Description\tCtrl-D"), _("View pattern description")); - menuGame->Append(ID_CLEAR, _("&Clear\tCtrl-C"), _("Clear game field")); menuGame->Append(ID_START, _("&Start\tCtrl-S"), _("Start")); menuGame->Append(ID_STEP, _("&Next\tCtrl-N"), _("Single step")); - menuGame->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop")); - menuGame->Enable(ID_STOP, FALSE); + menuGame->Append(wxID_STOP, wxEmptyString, _("Stop")); + menuGame->Enable(wxID_STOP, false); menuGame->AppendSeparator(); - menuGame->Append(ID_WRAP, _("&Wraparound\tCtrl-W"), _("Wrap around borders"), TRUE); - menuGame->Check (ID_WRAP, TRUE); + menuGame->Append(ID_TOPSPEED, _("T&op speed!"), _("Go as fast as possible")); + + menuHelp->Append(wxID_ABOUT, _("&About\tCtrl-A"), _("Show about dialog")); wxMenuBar *menuBar = new wxMenuBar(); menuBar->Append(menuFile, _("&File")); + menuBar->Append(menuView, _("&View")); menuBar->Append(menuGame, _("&Game")); + menuBar->Append(menuHelp, _("&Help")); SetMenuBar(menuBar); // tool bar - wxBitmap tbBitmaps[3]; + wxBitmap tbBitmaps[7]; tbBitmaps[0] = wxBITMAP(reset); - tbBitmaps[1] = wxBITMAP(play); - tbBitmaps[2] = wxBITMAP(stop); + tbBitmaps[1] = wxBITMAP(open); + tbBitmaps[2] = wxBITMAP(zoomin); + tbBitmaps[3] = wxBITMAP(zoomout); + tbBitmaps[4] = wxBITMAP(info); + tbBitmaps[5] = wxBITMAP(play); + tbBitmaps[6] = wxBITMAP(stop); wxToolBar *toolBar = CreateToolBar(); toolBar->SetMargins(5, 5); toolBar->SetToolBitmapSize(wxSize(16, 16)); - ADD_TOOL(ID_CLEAR, tbBitmaps[0], _("Clear"), _("Clear game board")); - ADD_TOOL(ID_START, tbBitmaps[1], _("Start"), _("Start")); - ADD_TOOL(ID_STOP , tbBitmaps[2], _("Stop"), _("Stop")); - toolBar->EnableTool(ID_STOP, FALSE); + + ADD_TOOL(wxID_NEW, tbBitmaps[0], wxGetStockLabel(wxID_NEW, wxSTOCK_NOFLAGS), _("Start a new game")); +#ifndef __POCKETPC__ +#if wxUSE_FILEDLG + ADD_TOOL(wxID_OPEN, tbBitmaps[1], wxGetStockLabel(wxID_OPEN, wxSTOCK_NOFLAGS), _("Open an existing Life pattern")); +#endif // wxUSE_FILEDLG + + toolBar->AddSeparator(); + ADD_TOOL(wxID_ZOOM_IN, tbBitmaps[2], wxGetStockLabel(wxID_ZOOM_IN, wxSTOCK_NOFLAGS), _("Zoom in")); + ADD_TOOL(wxID_ZOOM_OUT, tbBitmaps[3], wxGetStockLabel(wxID_ZOOM_OUT, wxSTOCK_NOFLAGS), _("Zoom out")); + ADD_TOOL(ID_INFO, tbBitmaps[4], _("Description"), _("Show description")); + toolBar->AddSeparator(); +#endif // __POCKETPC__ + ADD_TOOL(ID_START, tbBitmaps[5], _("Start"), _("Start")); + ADD_TOOL(wxID_STOP, tbBitmaps[6], _("Stop"), _("Stop")); + toolBar->Realize(); + toolBar->EnableTool(wxID_STOP, false); // must be after Realize() ! +#if wxUSE_STATUSBAR // status bar CreateStatusBar(2); SetStatusText(_("Welcome to Life!")); +#endif // wxUSE_STATUSBAR + + // game and timer + m_life = new Life(); + m_timer = new wxTimer(this, ID_TIMER); + m_running = false; + m_topspeed = false; + m_interval = 500; + m_tics = 0; + + // We use two different panels to reduce flicker in wxGTK, because + // some widgets (like wxStaticText) don't have their own X11 window, + // and thus updating the text would result in a refresh of the canvas + // if they belong to the same parent. + + wxPanel *panel1 = new wxPanel(this, wxID_ANY); + wxPanel *panel2 = new wxPanel(this, wxID_ANY); + + // canvas + m_canvas = new LifeCanvas(panel1, m_life); + + // info panel + m_text = new wxStaticText(panel2, wxID_ANY, + wxEmptyString, + wxDefaultPosition, + wxDefaultSize, + wxALIGN_CENTER | wxST_NO_AUTORESIZE); - // game - wxPanel *panel = new wxPanel(this, -1); - m_life = new Life(20, 20); - m_canvas = new LifeCanvas(panel, m_life); - m_timer = new LifeTimer(); - m_interval = 500; - m_tics = 0; - m_text = new wxStaticText(panel, -1, ""); - UpdateInfoText(); - - // slider - wxSlider *slider = new wxSlider(panel, ID_SLIDER, + wxSlider *slider = new wxSlider(panel2, ID_SLIDER, 5, 1, 10, wxDefaultPosition, - wxSize(200, -1), + wxSize(200, wxDefaultCoord), wxSL_HORIZONTAL | wxSL_AUTOTICKS); + UpdateInfoText(); + // component layout - wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL); - sizer->Add(new wxStaticLine(panel, -1), 0, wxGROW | wxCENTRE); - sizer->Add(m_canvas, 1, wxGROW | wxCENTRE | wxALL, 5); - sizer->Add(new wxStaticLine(panel, -1), 0, wxGROW | wxCENTRE); - sizer->Add(m_text, 0, wxCENTRE | wxTOP, 5); - sizer->Add(slider, 0, wxCENTRE | wxALL, 5); - panel->SetSizer(sizer); - panel->SetAutoLayout(TRUE); - sizer->Fit(this); - sizer->SetSizeHints(this); + wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL); + wxBoxSizer *sizer2 = new wxBoxSizer(wxVERTICAL); + wxBoxSizer *sizer3 = new wxBoxSizer(wxVERTICAL); + +#if wxUSE_STATLINE + sizer1->Add( new wxStaticLine(panel1, wxID_ANY), 0, wxGROW ); +#endif // wxUSE_STATLINE + sizer1->Add( m_canvas, 1, wxGROW | wxALL, 2 ); +#if wxUSE_STATLINE + sizer1->Add( new wxStaticLine(panel1, wxID_ANY), 0, wxGROW ); +#endif // wxUSE_STATLINE + panel1->SetSizer( sizer1 ); + sizer1->Fit( panel1 ); + + sizer2->Add( m_text, 0, wxGROW | wxTOP, 4 ); + sizer2->Add( slider, 0, wxCENTRE | wxALL, 4 ); + + panel2->SetSizer( sizer2 ); + sizer2->Fit( panel2 ); + + sizer3->Add( panel1, 1, wxGROW ); + sizer3->Add( panel2, 0, wxGROW ); + SetSizer( sizer3 ); + +#ifndef __WXWINCE__ + sizer3->Fit( this ); + + // set minimum frame size + sizer3->SetSizeHints( this ); + + // navigator frame - not appropriate for small devices + m_navigator = new LifeNavigator(this); +#endif + } LifeFrame::~LifeFrame() { delete m_timer; - delete m_life; } void LifeFrame::UpdateInfoText() { wxString msg; - msg.Printf(_("Generation: %u, Interval: %u ms"), m_tics, m_interval); + msg.Printf(_(" Generation: %lu (T: %lu ms), Population: %lu "), + m_tics, + m_topspeed? 0 : m_interval, + static_cast(m_life->GetNumCells())); m_text->SetLabel(msg); } -// event handlers +// Enable or disable tools and menu entries according to the current +// state. See also wxEVT_UPDATE_UI events for a slightly different +// way to do this. +void LifeFrame::UpdateUI() +{ + // start / stop + GetToolBar()->EnableTool(ID_START, !m_running); + GetToolBar()->EnableTool(wxID_STOP, m_running); + GetMenuBar()->Enable(ID_START, !m_running); + GetMenuBar()->Enable(ID_STEP, !m_running); + GetMenuBar()->Enable(wxID_STOP, m_running); + GetMenuBar()->Enable(ID_TOPSPEED, !m_topspeed); + + // zooming + int cellsize = m_canvas->GetCellSize(); + GetToolBar()->EnableTool(wxID_ZOOM_IN, cellsize < 32); + GetToolBar()->EnableTool(wxID_ZOOM_OUT, cellsize > 1); + GetMenuBar()->Enable(wxID_ZOOM_IN, cellsize < 32); + GetMenuBar()->Enable(wxID_ZOOM_OUT, cellsize > 1); +} + +// Event handlers ----------------------------------------------------------- + +// OnMenu handles all events which don't have their own event handler void LifeFrame::OnMenu(wxCommandEvent& event) { switch (event.GetId()) { - case ID_START : OnStart(); break; - case ID_STEP : OnTimer(); break; - case ID_STOP : OnStop(); break; - case ID_WRAP : - { - bool checked = GetMenuBar()->GetMenu(1)->IsChecked(ID_WRAP); - m_life->SetBorderWrap(checked); - break; - } - case ID_CLEAR : + case wxID_NEW: { + // stop if it was running OnStop(); m_life->Clear(); - m_canvas->DrawEverything(TRUE); - m_canvas->Refresh(FALSE); + m_canvas->Recenter(0, 0); m_tics = 0; UpdateInfoText(); break; } - case ID_ABOUT : + case wxID_ABOUT: { - wxMessageBox( - _("This is the about dialog of the Life! sample.\n" - "(c) 2000 Guillermo Rodriguez Garcia"), - _("About Life!"), - wxOK | wxICON_INFORMATION, - this); + LifeAboutDialog dialog(this); + dialog.ShowModal(); break; } - case ID_EXIT : + case wxID_EXIT: { - // TRUE is to force the frame to close - Close(TRUE); + // true is to force the frame to close + Close(true); break; } - } -} + case ID_SHOWNAV: + { + bool checked = GetMenuBar()->GetMenu(1)->IsChecked(ID_SHOWNAV); + if (m_navigator) + m_navigator->Show(checked); + break; + } + case ID_INFO: + { + wxString desc = m_life->GetDescription(); -void LifeFrame::OnNewGame(wxCommandEvent& WXUNUSED(event)) -{ - int w = m_life->GetWidth(); - int h = m_life->GetHeight(); + if ( desc.empty() ) + desc = _("Not available"); - // stop if it was running - OnStop(); + // should we make the description editable here? + wxMessageBox(desc, _("Description"), wxOK | wxICON_INFORMATION); - // dialog box - LifeNewGameDialog dialog(this, &w, &h); + break; + } + case ID_START : OnStart(); break; + case ID_STEP : OnStep(); break; + case wxID_STOP : OnStop(); break; + case ID_TOPSPEED: + { + m_running = true; + m_topspeed = true; + UpdateUI(); + while (m_running && m_topspeed) + { + OnStep(); + wxYield(); + } + break; + } + } +} - // new game? - if (dialog.ShowModal() == wxID_OK) +#if wxUSE_FILEDLG +void LifeFrame::OnOpen(wxCommandEvent& WXUNUSED(event)) +{ + wxFileDialog filedlg(this, + _("Choose a file to open"), + wxEmptyString, + wxEmptyString, + _("Life patterns (*.lif)|*.lif|All files (*.*)|*.*"), + wxFD_OPEN | wxFD_FILE_MUST_EXIST); + + if (filedlg.ShowModal() == wxID_OK) { - // check dimensions - if (w >= LIFE_MIN && w <= LIFE_MAX && - h >= LIFE_MIN && h <= LIFE_MAX) + wxFileInputStream stream(filedlg.GetPath()); + LifeReader reader(stream); + + // the reader handles errors itself, no need to do anything here + if (reader.IsOk()) { - // resize game field - m_life->Destroy(); - m_life->Create(w, h); - - // tell the canvas - m_canvas->Reset(); - m_canvas->Refresh(); + // stop if running and put the pattern + OnStop(); + m_life->Clear(); + m_life->SetPattern(reader.GetPattern()); + + // recenter canvas + m_canvas->Recenter(0, 0); m_tics = 0; UpdateInfoText(); } - else - { - wxString msg; - msg.Printf(_("Both dimensions must be within %u and %u.\n"), - LIFE_MIN, LIFE_MAX); - wxMessageBox(msg, _("Error!"), wxOK | wxICON_EXCLAMATION, this); - } } } +#endif void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event)) { @@ -320,60 +487,92 @@ void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event)) // dialog box LifeSamplesDialog dialog(this); - // new game? if (dialog.ShowModal() == wxID_OK) { - int result = dialog.GetValue(); + const LifePattern pattern = dialog.GetPattern(); - if (result == -1) - return; + // put the pattern + m_life->Clear(); + m_life->SetPattern(pattern); - int gw = g_shapes[result].m_fieldWidth; - int gh = g_shapes[result].m_fieldHeight; - int wrap = g_shapes[result].m_wrap; + // recenter canvas + m_canvas->Recenter(0, 0); + m_tics = 0; + UpdateInfoText(); + } +} - // set wraparound (don't ask the user) - m_life->SetBorderWrap(wrap); - GetMenuBar()->GetMenu(1)->Check(ID_WRAP, wrap); +void LifeFrame::OnZoom(wxCommandEvent& event) +{ + int cellsize = m_canvas->GetCellSize(); - // need to resize the game field? - if (gw > m_life->GetWidth() || gh > m_life->GetHeight()) - { - wxString s; - s.Printf(_("Your game field is too small for this configuration.\n" - "It is recommended to resize it to %u x %u. Proceed?\n"), - gw, gh); + if ((event.GetId() == wxID_ZOOM_IN) && cellsize < 32) + { + m_canvas->SetCellSize(cellsize * 2); + UpdateUI(); + } + else if ((event.GetId() == wxID_ZOOM_OUT) && cellsize > 1) + { + m_canvas->SetCellSize(cellsize / 2); + UpdateUI(); + } +} - if (wxMessageBox(s, _("Question"), wxYES_NO | wxICON_QUESTION, this) == wxYES) - { - m_life->Destroy(); - m_life->Create(gw, gh); - } - } +void LifeFrame::OnNavigate(wxCommandEvent& event) +{ + LifeCell c; - // put the shape - m_life->SetShape(g_shapes[result]); + switch (event.GetId()) + { + case ID_NORTH: c = m_life->FindNorth(); break; + case ID_SOUTH: c = m_life->FindSouth(); break; + case ID_WEST: c = m_life->FindWest(); break; + case ID_EAST: c = m_life->FindEast(); break; + case ID_CENTER: c = m_life->FindCenter(); break; + default : + wxFAIL; + // Fall through! + case ID_ORIGIN: c.i = c.j = 0; break; + } - // tell the canvas about the change - m_canvas->Reset(); - m_canvas->Refresh(); - m_tics = 0; - UpdateInfoText(); + m_canvas->Recenter(c.i, c.j); +} + +void LifeFrame::OnSlider(wxScrollEvent& event) +{ + m_interval = event.GetPosition() * 100; + + if (m_running) + { + OnStop(); + OnStart(); } + + UpdateInfoText(); +} + +void LifeFrame::OnTimer(wxTimerEvent& WXUNUSED(event)) +{ + OnStep(); +} + +void LifeFrame::OnClose(wxCloseEvent& WXUNUSED(event)) +{ + // Stop if it was running; this is absolutely needed because + // the frame won't be actually destroyed until there are no + // more pending events, and this in turn won't ever happen + // if the timer is running faster than the window can redraw. + OnStop(); + Destroy(); } void LifeFrame::OnStart() { if (!m_running) { - GetToolBar()->EnableTool(ID_START, FALSE); - GetToolBar()->EnableTool(ID_STOP, TRUE); - GetMenuBar()->GetMenu(1)->Enable(ID_START, FALSE); - GetMenuBar()->GetMenu(1)->Enable(ID_STEP, FALSE); - GetMenuBar()->GetMenu(1)->Enable(ID_STOP, TRUE); - m_timer->Start(m_interval); - m_running = TRUE; + m_running = true; + UpdateUI(); } } @@ -381,51 +580,110 @@ void LifeFrame::OnStop() { if (m_running) { - GetToolBar()->EnableTool(ID_START, TRUE); - GetToolBar()->EnableTool(ID_STOP, FALSE); - GetMenuBar()->GetMenu(1)->Enable(ID_START, TRUE); - GetMenuBar()->GetMenu(1)->Enable(ID_STEP, TRUE); - GetMenuBar()->GetMenu(1)->Enable(ID_STOP, FALSE); - m_timer->Stop(); - m_running = FALSE; + m_running = false; + m_topspeed = false; + UpdateUI(); } } -void LifeFrame::OnTimer() +void LifeFrame::OnStep() { if (m_life->NextTic()) m_tics++; else OnStop(); + m_canvas->DrawChanged(); UpdateInfoText(); - m_canvas->DrawEverything(); - m_canvas->Refresh(FALSE); } -void LifeFrame::OnSlider(wxScrollEvent& event) + +// -------------------------------------------------------------------------- +// LifeNavigator miniframe +// -------------------------------------------------------------------------- + +LifeNavigator::LifeNavigator(wxWindow *parent) + : wxMiniFrame(parent, wxID_ANY, + _("Navigation"), + wxDefaultPosition, + wxDefaultSize, + wxCAPTION | wxSIMPLE_BORDER) { - m_interval = event.GetPosition() * 100; + wxPanel *panel = new wxPanel(this, wxID_ANY); + wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL); + wxBoxSizer *sizer2 = new wxBoxSizer(wxHORIZONTAL); + + // create bitmaps and masks for the buttons + wxBitmap + bmpn = wxBITMAP(north), + bmpw = wxBITMAP(west), + bmpc = wxBITMAP(center), + bmpe = wxBITMAP(east), + bmps = wxBITMAP(south); + +#if !defined(__WXGTK__) && !defined(__WXMOTIF__) && !defined(__WXMAC__) + bmpn.SetMask(new wxMask(bmpn, *wxLIGHT_GREY)); + bmpw.SetMask(new wxMask(bmpw, *wxLIGHT_GREY)); + bmpc.SetMask(new wxMask(bmpc, *wxLIGHT_GREY)); + bmpe.SetMask(new wxMask(bmpe, *wxLIGHT_GREY)); + bmps.SetMask(new wxMask(bmps, *wxLIGHT_GREY)); +#endif - // restart timer if running, to set the new interval - if (m_running) - { - m_timer->Stop(); - m_timer->Start(m_interval); - } + // create the buttons and attach tooltips to them + wxBitmapButton + *bn = new wxBitmapButton(panel, ID_NORTH, bmpn), + *bw = new wxBitmapButton(panel, ID_WEST , bmpw), + *bc = new wxBitmapButton(panel, ID_CENTER, bmpc), + *be = new wxBitmapButton(panel, ID_EAST , bmpe), + *bs = new wxBitmapButton(panel, ID_SOUTH, bmps); + +#if wxUSE_TOOLTIPS + bn->SetToolTip(_("Find northernmost cell")); + bw->SetToolTip(_("Find westernmost cell")); + bc->SetToolTip(_("Find center of mass")); + be->SetToolTip(_("Find easternmost cell")); + bs->SetToolTip(_("Find southernmost cell")); +#endif - UpdateInfoText(); + // add buttons to sizers + sizer2->Add( bw, 0, wxCENTRE | wxWEST, 4 ); + sizer2->Add( bc, 0, wxCENTRE); + sizer2->Add( be, 0, wxCENTRE | wxEAST, 4 ); + sizer1->Add( bn, 0, wxCENTRE | wxNORTH, 4 ); + sizer1->Add( sizer2 ); + sizer1->Add( bs, 0, wxCENTRE | wxSOUTH, 4 ); + + // set the panel and miniframe size + panel->SetSizer(sizer1); + + sizer1->Fit(panel); + SetClientSize(panel->GetSize()); + wxSize sz = GetSize(); + SetSizeHints(sz.x, sz.y, sz.x, sz.y); + + // move it to a sensible position + wxRect parentRect = parent->GetRect(); + wxSize childSize = GetSize(); + int x = parentRect.GetX() + + parentRect.GetWidth(); + int y = parentRect.GetY() + + (parentRect.GetHeight() - childSize.GetHeight()) / 4; + Move(x, y); + + // done + Show(true); } -// -------------------------------------------------------------------------- -// LifeTimer -// -------------------------------------------------------------------------- - -void LifeTimer::Notify() +void LifeNavigator::OnClose(wxCloseEvent& event) { - GET_FRAME()->OnTimer(); -}; + // avoid if we can + if (event.CanVeto()) + event.Veto(); + else + Destroy(); +} + // -------------------------------------------------------------------------- // LifeCanvas @@ -433,130 +691,205 @@ void LifeTimer::Notify() // canvas constructor LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive) - : wxScrolledWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100)) + : wxWindow(parent, wxID_ANY, wxDefaultPosition, wxSize(100, 100), + wxFULL_REPAINT_ON_RESIZE | wxHSCROLL | wxVSCROLL +#if !defined(__SMARTPHONE__) && !defined(__POCKETPC__) + |wxSUNKEN_BORDER +#else + |wxSIMPLE_BORDER +#endif + ) { m_life = life; m_interactive = interactive; m_cellsize = 8; - m_bmp = NULL; - Reset(); + m_status = MOUSE_NOACTION; + m_viewportX = 0; + m_viewportY = 0; + m_viewportH = 0; + m_viewportW = 0; + + if (m_interactive) + SetCursor(*wxCROSS_CURSOR); + + // reduce flicker if wxEVT_ERASE_BACKGROUND is not available + SetBackgroundColour(*wxWHITE); } LifeCanvas::~LifeCanvas() { - delete m_bmp; + delete m_life; } -void LifeCanvas::Reset() +// recenter at the given position +void LifeCanvas::Recenter(wxInt32 i, wxInt32 j) { - if (m_bmp) - delete m_bmp; - - m_status = MOUSE_NOACTION; - m_width = CellToCoord(m_life->GetWidth()) + 1; - m_height = CellToCoord(m_life->GetHeight()) + 1; - m_bmp = new wxBitmap(m_width, m_height); - wxCoord w = GetClientSize().GetX(); - wxCoord h = GetClientSize().GetY(); - m_xoffset = (w > m_width)? ((w - m_width) / 2) : 0; - m_yoffset = (h > m_height)? ((h - m_height) / 2) : 0; + m_viewportX = i - m_viewportW / 2; + m_viewportY = j - m_viewportH / 2; // redraw everything - DrawEverything(TRUE); - SetScrollbars(10, 10, (m_width + 9) / 10, (m_height + 9) / 10); + Refresh(false); } -void LifeCanvas::DrawEverything(bool force) +// set the cell size and refresh display +void LifeCanvas::SetCellSize(int cellsize) { - wxMemoryDC dc; + m_cellsize = cellsize; - dc.SelectObject(*m_bmp); - dc.BeginDrawing(); + // find current center + wxInt32 cx = m_viewportX + m_viewportW / 2; + wxInt32 cy = m_viewportY + m_viewportH / 2; - // draw cells - const CellArray *cells = - force? m_life->GetCells() : m_life->GetChangedCells(); + // get current canvas size and adjust viewport accordingly + int w, h; + GetClientSize(&w, &h); + m_viewportW = (w + m_cellsize - 1) / m_cellsize; + m_viewportH = (h + m_cellsize - 1) / m_cellsize; - for (unsigned i = 0; i < cells->GetCount(); i++) - DrawCell(cells->Item(i), dc); + // recenter + m_viewportX = cx - m_viewportW / 2; + m_viewportY = cy - m_viewportH / 2; - // bounding rectangle (always drawn - better than clipping region) - dc.SetPen(*wxBLACK_PEN); - dc.SetBrush(*wxTRANSPARENT_BRUSH); - dc.DrawRectangle(0, 0, m_width, m_height); + // adjust scrollbars + if (m_interactive) + { + SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW); + SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH); + m_thumbX = m_viewportW; + m_thumbY = m_viewportH; + } - dc.EndDrawing(); - dc.SelectObject(wxNullBitmap); + Refresh(false); } -void LifeCanvas::DrawCell(Cell c) +// draw a cell +void LifeCanvas::DrawCell(wxInt32 i, wxInt32 j, bool alive) { - wxMemoryDC dc; + wxClientDC dc(this); - dc.SelectObject(*m_bmp); - dc.BeginDrawing(); + dc.SetPen(alive? *wxBLACK_PEN : *wxWHITE_PEN); + dc.SetBrush(alive? *wxBLACK_BRUSH : *wxWHITE_BRUSH); - dc.SetClippingRegion(1, 1, m_width - 2, m_height - 2); - DrawCell(c, dc); + DrawCell(i, j, dc); +} - dc.EndDrawing(); - dc.SelectObject(wxNullBitmap); +void LifeCanvas::DrawCell(wxInt32 i, wxInt32 j, wxDC &dc) +{ + wxCoord x = CellToX(i); + wxCoord y = CellToY(j); + + // if cellsize is 1 or 2, there will be no grid + switch (m_cellsize) + { + case 1: + dc.DrawPoint(x, y); + break; + case 2: + dc.DrawRectangle(x, y, 2, 2); + break; + default: + dc.DrawRectangle(x + 1, y + 1, m_cellsize - 1, m_cellsize - 1); + } } -void LifeCanvas::DrawCell(Cell c, wxDC &dc) +// draw all changed cells +void LifeCanvas::DrawChanged() { - if (m_life->IsAlive(c)) + wxClientDC dc(this); + + size_t ncells; + LifeCell *cells; + bool done = false; + + m_life->BeginFind(m_viewportX, + m_viewportY, + m_viewportX + m_viewportW, + m_viewportY + m_viewportH, + true); + + if (m_cellsize == 1) { dc.SetPen(*wxBLACK_PEN); - dc.SetBrush(*wxBLACK_BRUSH); - dc.DrawRectangle(CellToCoord( m_life->GetX(c) ), - CellToCoord( m_life->GetY(c) ), - m_cellsize, - m_cellsize); } else { - dc.SetPen(*wxLIGHT_GREY_PEN); - dc.SetBrush(*wxTRANSPARENT_BRUSH); - dc.DrawRectangle(CellToCoord( m_life->GetX(c) ), - CellToCoord( m_life->GetY(c) ), - m_cellsize, - m_cellsize); - dc.SetPen(*wxWHITE_PEN); - dc.SetBrush(*wxWHITE_BRUSH); - dc.DrawRectangle(CellToCoord( m_life->GetX(c) ) + 1, - CellToCoord( m_life->GetY(c) ) + 1, - m_cellsize - 1, - m_cellsize - 1); + dc.SetPen(*wxTRANSPARENT_PEN); + dc.SetBrush(*wxBLACK_BRUSH); + } + dc.SetLogicalFunction(wxINVERT); + + while (!done) + { + done = m_life->FindMore(&cells, &ncells); + + for (size_t m = 0; m < ncells; m++) + DrawCell(cells[m].i, cells[m].j, dc); } } // event handlers -void LifeCanvas::OnPaint(wxPaintEvent& event) +void LifeCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) { wxPaintDC dc(this); - wxMemoryDC memdc; + wxRect rect = GetUpdateRegion().GetBox(); + wxCoord x, y, w, h; + wxInt32 i0, j0, i1, j1; + + // find damaged area + x = rect.GetX(); + y = rect.GetY(); + w = rect.GetWidth(); + h = rect.GetHeight(); + + i0 = XToCell(x); + j0 = YToCell(y); + i1 = XToCell(x + w - 1); + j1 = YToCell(y + h - 1); + + size_t ncells; + LifeCell *cells; + + m_life->BeginFind(i0, j0, i1, j1, false); + bool done = m_life->FindMore(&cells, &ncells); + + // erase all damaged cells and draw the grid + dc.SetBrush(*wxWHITE_BRUSH); + + if (m_cellsize <= 2) + { + // no grid + dc.SetPen(*wxWHITE_PEN); + dc.DrawRectangle(x, y, w, h); + } + else + { + x = CellToX(i0); + y = CellToY(j0); + w = CellToX(i1 + 1) - x + 1; + h = CellToY(j1 + 1) - y + 1; - wxRegionIterator upd(GetUpdateRegion()); - wxCoord x, y, w, h, xx, yy; + dc.SetPen(*wxLIGHT_GREY_PEN); + for (wxInt32 yy = y; yy <= (y + h - m_cellsize); yy += m_cellsize) + dc.DrawRectangle(x, yy, w, m_cellsize + 1); + for (wxInt32 xx = x; xx <= (x + w - m_cellsize); xx += m_cellsize) + dc.DrawLine(xx, y, xx, y + h); + } - dc.BeginDrawing(); - memdc.SelectObject(*m_bmp); + // draw all alive cells + dc.SetPen(*wxBLACK_PEN); + dc.SetBrush(*wxBLACK_BRUSH); - while(upd) + while (!done) { - x = upd.GetX(); - y = upd.GetY(); - w = upd.GetW(); - h = upd.GetH(); - CalcUnscrolledPosition(x, y, &xx, &yy); + for (size_t m = 0; m < ncells; m++) + DrawCell(cells[m].i, cells[m].j, dc); - dc.Blit(x, y, w, h, &memdc, xx - m_xoffset, yy - m_yoffset); - upd++; + done = m_life->FindMore(&cells, &ncells); } - memdc.SelectObject(wxNullBitmap); - dc.EndDrawing(); + // last set + for (size_t m = 0; m < ncells; m++) + DrawCell(cells[m].i, cells[m].j, dc); } void LifeCanvas::OnMouse(wxMouseEvent& event) @@ -564,67 +897,230 @@ void LifeCanvas::OnMouse(wxMouseEvent& event) if (!m_interactive) return; - int x, y, xx, yy, i, j; - // which cell are we pointing at? - x = event.GetX(); - y = event.GetY(); - CalcUnscrolledPosition(x, y, &xx, &yy); - i = CoordToCell( xx - m_xoffset ); - j = CoordToCell( yy - m_yoffset ); - - // adjust x, y to point to the upper left corner of the cell - CalcScrolledPosition( CellToCoord(i) + m_xoffset, - CellToCoord(j) + m_yoffset, - &x, &y ); + wxInt32 i = XToCell( event.GetX() ); + wxInt32 j = YToCell( event.GetY() ); - // set cursor shape and statusbar text - if (i < 0 || i >= m_life->GetWidth() || - j < 0 || j >= m_life->GetHeight()) - { - GET_FRAME()->SetStatusText(wxEmptyString, 1); - SetCursor(*wxSTANDARD_CURSOR); - } - else - { - wxString msg; - msg.Printf(_("Cell: (%u, %u)"), i, j); - GET_FRAME()->SetStatusText(msg, 1); - SetCursor(*wxCROSS_CURSOR); - } - - // button pressed? +#if wxUSE_STATUSBAR + // set statusbar text + wxString msg; + msg.Printf(_("Cell: (%d, %d)"), i, j); + ((LifeFrame *) wxGetApp().GetTopWindow())->SetStatusText(msg, 1); +#endif // wxUSE_STATUSBAR + + // NOTE that wxMouseEvent::LeftDown() and wxMouseEvent::LeftIsDown() + // have different semantics. The first one is used to signal that the + // button was just pressed (i.e., in "button down" events); the second + // one just describes the current status of the button, independently + // of the mouse event type. LeftIsDown is typically used in "mouse + // move" events, to test if the button is _still_ pressed. + + // is the button down? if (!event.LeftIsDown()) { m_status = MOUSE_NOACTION; + return; } - else if (i >= 0 && i < m_life->GetWidth() && - j >= 0 && j < m_life->GetHeight()) + + // was it pressed just now? + if (event.LeftDown()) { - bool alive = m_life->IsAlive(i, j); + // yes: start a new action and toggle this cell + m_status = (m_life->IsAlive(i, j)? MOUSE_ERASING : MOUSE_DRAWING); - // if just pressed, update status - if (m_status == MOUSE_NOACTION) - m_status = (alive? MOUSE_ERASING : MOUSE_DRAWING); + m_mi = i; + m_mj = j; + m_life->SetCell(i, j, m_status == MOUSE_DRAWING); + DrawCell(i, j, m_status == MOUSE_DRAWING); + } + else if ((m_mi != i) || (m_mj != j)) + { + // no: continue ongoing action + bool alive = (m_status == MOUSE_DRAWING); + + // prepare DC and pen + brush to optimize drawing + wxClientDC dc(this); + dc.SetPen(alive? *wxBLACK_PEN : *wxWHITE_PEN); + dc.SetBrush(alive? *wxBLACK_BRUSH : *wxWHITE_BRUSH); + + // draw a line of cells using Bresenham's algorithm + wxInt32 d, ii, jj, di, ai, si, dj, aj, sj; + di = i - m_mi; + ai = abs(di) << 1; + si = (di < 0)? -1 : 1; + dj = j - m_mj; + aj = abs(dj) << 1; + sj = (dj < 0)? -1 : 1; + + ii = m_mi; + jj = m_mj; + + if (ai > aj) + { + // iterate over i + d = aj - (ai >> 1); - // toggle cell and refresh if needed - if (((m_status == MOUSE_ERASING) && alive) || - ((m_status == MOUSE_DRAWING) && !alive)) + while (ii != i) + { + m_life->SetCell(ii, jj, alive); + DrawCell(ii, jj, dc); + if (d >= 0) + { + jj += sj; + d -= ai; + } + ii += si; + d += aj; + } + } + else { - wxRect rect(x, y, m_cellsize + 1, m_cellsize + 1); - DrawCell( m_life->SetCell(i, j, !alive) ); - Refresh(FALSE, &rect); + // iterate over j + d = ai - (aj >> 1); + + while (jj != j) + { + m_life->SetCell(ii, jj, alive); + DrawCell(ii, jj, dc); + if (d >= 0) + { + ii += si; + d -= aj; + } + jj += sj; + d += ai; + } } + + // last cell + m_life->SetCell(ii, jj, alive); + DrawCell(ii, jj, dc); + m_mi = ii; + m_mj = jj; } + + ((LifeFrame *) wxGetApp().GetTopWindow())->UpdateInfoText(); } void LifeCanvas::OnSize(wxSizeEvent& event) { + // find center + wxInt32 cx = m_viewportX + m_viewportW / 2; + wxInt32 cy = m_viewportY + m_viewportH / 2; + + // get new size wxCoord w = event.GetSize().GetX(); wxCoord h = event.GetSize().GetY(); - m_xoffset = (w > m_width)? ((w - m_width) / 2) : 0; - m_yoffset = (h > m_height)? ((h - m_height) / 2) : 0; + m_viewportW = (w + m_cellsize - 1) / m_cellsize; + m_viewportH = (h + m_cellsize - 1) / m_cellsize; + + // recenter + m_viewportX = cx - m_viewportW / 2; + m_viewportY = cy - m_viewportH / 2; + + // scrollbars + if (m_interactive) + { + SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW); + SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH); + m_thumbX = m_viewportW; + m_thumbY = m_viewportH; + } // allow default processing event.Skip(); } + +void LifeCanvas::OnScroll(wxScrollWinEvent& event) +{ + WXTYPE type = (WXTYPE)event.GetEventType(); + int pos = event.GetPosition(); + int orient = event.GetOrientation(); + + // calculate scroll increment + int scrollinc = 0; + if (type == wxEVT_SCROLLWIN_TOP) + { + if (orient == wxHORIZONTAL) + scrollinc = -m_viewportW; + else + scrollinc = -m_viewportH; + } + else + if (type == wxEVT_SCROLLWIN_BOTTOM) + { + if (orient == wxHORIZONTAL) + scrollinc = m_viewportW; + else + scrollinc = m_viewportH; + } + else + if (type == wxEVT_SCROLLWIN_LINEUP) + { + scrollinc = -1; + } + else + if (type == wxEVT_SCROLLWIN_LINEDOWN) + { + scrollinc = +1; + } + else + if (type == wxEVT_SCROLLWIN_PAGEUP) + { + scrollinc = -10; + } + else + if (type == wxEVT_SCROLLWIN_PAGEDOWN) + { + scrollinc = +10; + } + else + if (type == wxEVT_SCROLLWIN_THUMBTRACK) + { + if (orient == wxHORIZONTAL) + { + scrollinc = pos - m_thumbX; + m_thumbX = pos; + } + else + { + scrollinc = pos - m_thumbY; + m_thumbY = pos; + } + } + else + if (type == wxEVT_SCROLLWIN_THUMBRELEASE) + { + m_thumbX = m_viewportW; + m_thumbY = m_viewportH; + } + +#if defined(__WXGTK__) || defined(__WXMOTIF__) + // wxGTK and wxMotif update the thumb automatically (wxMSW doesn't); + // so reset it back as we always want it to be in the same position. + if (type != wxEVT_SCROLLWIN_THUMBTRACK) + { + SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW); + SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH); + } +#endif + + if (scrollinc == 0) return; + + // scroll the window and adjust the viewport + if (orient == wxHORIZONTAL) + { + m_viewportX += scrollinc; + ScrollWindow( -m_cellsize * scrollinc, 0, (const wxRect *) NULL); + } + else + { + m_viewportY += scrollinc; + ScrollWindow( 0, -m_cellsize * scrollinc, (const wxRect *) NULL); + } +} + +void LifeCanvas::OnEraseBackground(wxEraseEvent& WXUNUSED(event)) +{ + // do nothing. I just don't want the background to be erased, you know. +}