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6e7cdb7696963b6baef1aa33e15fedf9a4a2442d
wxWidgets/samples/life/life.cpp
Guillermo Rodriguez Garcia 6e7cdb7696 Add default size for slider 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5198 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-01-03 14:10:36 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: life.cpp
// Purpose: The game of life, created by J. H. Conway
// Author: Guillermo Rodriguez Garcia, <guille@iies.es>
// Modified by:
// Created: Jan/2000
// RCS-ID: $Id$
// Copyright: (c) 2000, Guillermo Rodriguez Garcia
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ==========================================================================
// declarations
// ==========================================================================
// minimum and maximum table size, in each dimension
#define LIFE_MIN 10
#define LIFE_MAX 200
// some shortcuts
#define ADD_TOOL(a, b, c, d) \
toolBar->AddTool(a, b, wxNullBitmap, FALSE, -1, -1, (wxObject *)0, c, d)
#define GET_FRAME() \
((wxFrame *) wxGetApp().GetTopWindow())
// --------------------------------------------------------------------------
// headers
// --------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "life.cpp"
#pragma interface "life.cpp"
#endif
// 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/spinctrl.h"
// --------------------------------------------------------------------------
// resources
// --------------------------------------------------------------------------
#if defined(__WXGTK__) || defined(__WXMOTIF__)
// the application icon
#include "mondrian.xpm"
// bitmap buttons for the toolbar
#include "bitmaps/reset.xpm"
#include "bitmaps/play.xpm"
#include "bitmaps/stop.xpm"
#endif
// --------------------------------------------------------------------------
// private classes
// --------------------------------------------------------------------------
class Life;
class LifeCanvas;
class LifeTimer;
class LifeFrame;
class LifeApp;
// Life
class Life
{
public:
// ctors and dtors
Life(int width, int height);
~Life();
void Create(int width, int height);
void Destroy();
// public accessors
inline int GetWidth() const { return m_width; };
inline int GetHeight() const { return m_height; };
inline bool IsAlive(int x, int y) const;
inline bool HasChanged(int x, int y) const;
inline void SetCell(int x, int y, bool alive = TRUE);
// game operations
void Clear();
void NextTic();
private:
enum CellFlags {
CELL_DEAD = 0x0000, // is dead
CELL_ALIVE = 0x0001, // is alive
CELL_MARK = 0x0002, // will change / has changed
};
typedef int Cell;
int GetNeighbors(int x, int y) const;
inline void SetCell(int x, int y, Cell status);
int m_width;
int m_height;
Cell *m_cells;
};
// Life canvas
class LifeCanvas : public wxScrolledWindow
{
public:
// ctor and dtor
LifeCanvas(wxWindow* parent, Life* life);
~LifeCanvas();
// member functions
void Reset();
void DrawEverything(bool force = FALSE);
void DrawCell(int i, int j);
void DrawCell(int i, int j, wxDC &dc);
inline int CellToCoord(int i) const { return (i * m_cellsize); };
inline int CoordToCell(int x) const { return ((x >= 0)? (x / m_cellsize) : -1); };
// event handlers
void OnPaint(wxPaintEvent& event);
void OnMouse(wxMouseEvent& event);
void OnSize(wxSizeEvent& event);
private:
// any class wishing to process wxWindows events must use this macro
DECLARE_EVENT_TABLE()
enum MouseStatus {
MOUSE_NOACTION,
MOUSE_DRAWING,
MOUSE_ERASING
};
Life *m_life;
wxFrame *m_frame;
wxBitmap *m_bmp;
int m_height;
int m_width;
int m_cellsize;
wxCoord m_xoffset;
wxCoord m_yoffset;
MouseStatus m_status;
};
// Life timer
class LifeTimer : public wxTimer
{
public:
LifeTimer(LifeFrame *parent);
void Notify();
private:
LifeFrame *m_parent;
};
// Life main frame
class LifeFrame : public wxFrame
{
public:
// ctor and dtor
LifeFrame();
~LifeFrame();
// member functions
void UpdateInfoText();
// event handlers
void OnMenu(wxCommandEvent& event);
void OnSlider(wxScrollEvent& event);
void OnNewGame();
void OnStart();
void OnStop();
void OnTimer();
private:
// any class wishing to process wxWindows events must use this macro
DECLARE_EVENT_TABLE()
Life *m_life;
LifeTimer *m_timer;
LifeCanvas *m_canvas;
wxStaticText *m_text;
bool m_running;
long m_interval;
long m_tics;
};
// Life new game dialog
class LifeNewGameDialog : public wxDialog
{
public:
// ctor
LifeNewGameDialog(wxWindow *parent, int *w, int *h);
// event handlers
void OnOK(wxCommandEvent& event);
void OnCancel(wxCommandEvent& event);
private:
// any class wishing to process wxWindows events must use this macro
DECLARE_EVENT_TABLE();
int *m_w;
int *m_h;
wxSpinCtrl *m_spinctrlw;
wxSpinCtrl *m_spinctrlh;
};
// Life app
class LifeApp : public wxApp
{
public:
virtual bool OnInit();
};
// --------------------------------------------------------------------------
// constants
// --------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items and toolbar buttons
ID_NEWGAME = 101,
ID_CLEAR,
ID_START,
ID_STOP,
ID_EXIT,
ID_ABOUT,
// slider
ID_SLIDER
};
// --------------------------------------------------------------------------
// event tables and other macros for wxWindows
// --------------------------------------------------------------------------
// Event tables
BEGIN_EVENT_TABLE(LifeFrame, wxFrame)
EVT_MENU_RANGE (ID_NEWGAME, ID_ABOUT, LifeFrame::OnMenu)
EVT_COMMAND_SCROLL (ID_SLIDER, LifeFrame::OnSlider)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(LifeCanvas, wxScrolledWindow)
EVT_PAINT ( LifeCanvas::OnPaint)
EVT_SIZE ( LifeCanvas::OnSize)
EVT_MOUSE_EVENTS ( LifeCanvas::OnMouse)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(LifeNewGameDialog, wxDialog)
EVT_BUTTON (wxID_OK, LifeNewGameDialog::OnOK)
EVT_BUTTON (wxID_CANCEL, LifeNewGameDialog::OnCancel)
END_EVENT_TABLE()
// Create a new application object
IMPLEMENT_APP(LifeApp)
// ==========================================================================
// implementation
// ==========================================================================
// --------------------------------------------------------------------------
// LifeApp
// --------------------------------------------------------------------------
// `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);
// enter the main message loop and run the app
return TRUE;
}
// --------------------------------------------------------------------------
// LifeFrame
// --------------------------------------------------------------------------
// frame constructor
LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(50, 50))
{
// frame icon
SetIcon(wxICON(mondrian));
// menu bar
wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
menuFile->Append(ID_NEWGAME, _("&New game...\tCtrl-N"), _("Start a new game"));
menuFile->Append(ID_CLEAR, _("&Clear\tCtrl-C"), _("Clear game board"));
menuFile->Append(ID_START, _("&Start\tCtrl-S"), _("Start"));
menuFile->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop"));
menuFile->AppendSeparator();
menuFile->Append(ID_ABOUT, _("&About...\tCtrl-A"), _("Show about dialog"));
menuFile->AppendSeparator();
menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));
menuFile->Enable(ID_STOP, FALSE);
wxMenuBar *menuBar = new wxMenuBar();
menuBar->Append(menuFile, _("&File"));
SetMenuBar(menuBar);
// tool bar
wxBitmap tbBitmaps[3];
tbBitmaps[0] = wxBITMAP(reset);
tbBitmaps[1] = wxBITMAP(play);
tbBitmaps[2] = 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);
toolBar->Realize();
// status bar
CreateStatusBar(2);
SetStatusText(_("Welcome to Life!"));
// panel
wxPanel *panel = new wxPanel(this, -1);
// game
m_life = new Life(20, 20);
m_canvas = new LifeCanvas(panel, m_life);
m_timer = new LifeTimer(this);
m_interval = 500;
m_tics = 0;
m_text = new wxStaticText(panel, -1, "");
UpdateInfoText();
// slider
wxSlider *slider = new wxSlider(panel, ID_SLIDER, 5, 1, 10,
wxDefaultPosition, wxSize(200,-1), wxSL_HORIZONTAL | wxSL_AUTOTICKS);
// component layout
wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
sizer->Add(m_canvas, 1, wxGROW | wxCENTRE | wxALL, 5);
sizer->Add(new wxStaticLine(panel, -1), 0, wxGROW | wxCENTRE);
sizer->Add(m_text, 0, wxCENTRE | wxNORTH, 5);
sizer->Add(slider, 0, wxCENTRE | wxALL, 5);
panel->SetSizer(sizer);
panel->SetAutoLayout(TRUE);
sizer->Fit(this);
sizer->SetSizeHints(this);
}
LifeFrame::~LifeFrame()
{
delete m_timer;
delete m_life;
}
void LifeFrame::UpdateInfoText()
{
wxString msg;
msg.Printf(_("Generation: %u, Interval: %u ms"), m_tics, m_interval);
m_text->SetLabel(msg);
}
// event handlers
void LifeFrame::OnMenu(wxCommandEvent& event)
{
switch (event.GetId())
{
case ID_START : OnStart(); break;
case ID_STOP : OnStop(); break;
case ID_NEWGAME : OnNewGame(); break;
case ID_CLEAR :
{
OnStop();
m_life->Clear();
m_canvas->DrawEverything(TRUE);
m_canvas->Refresh(FALSE);
m_tics = 0;
UpdateInfoText();
break;
}
case ID_ABOUT :
{
wxMessageBox(
_("This is the about dialog of the Life! sample.\n"
"(c) 2000 Guillermo Rodriguez Garcia"),
_("About Life!"),
wxOK | wxICON_INFORMATION,
this);
break;
}
case ID_EXIT :
{
// TRUE is to force the frame to close
Close(TRUE);
break;
}
}
}
void LifeFrame::OnSlider(wxScrollEvent& event)
{
m_interval = event.GetPosition() * 100;
// restart timer if running, to set the new interval
if (m_running)
{
m_timer->Stop();
m_timer->Start(m_interval);
}
UpdateInfoText();
}
void LifeFrame::OnNewGame()
{
int w = m_life->GetWidth();
int h = m_life->GetHeight();
int result;
// stop if it was running
OnStop();
// show dialog box
LifeNewGameDialog dialog(this, &w, &h);
result = dialog.ShowModal();
// create new game
if (result == wxID_OK)
{
// check dimensions
if (w >= LIFE_MIN && w <= LIFE_MAX &&
h >= LIFE_MIN && h <= LIFE_MAX)
{
m_life->Destroy();
m_life->Create(w, h);
m_canvas->Reset();
m_tics = 0;
UpdateInfoText();
m_canvas->Refresh();
}
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);
}
}
}
void LifeFrame::OnStart()
{
GetToolBar()->EnableTool(ID_START, FALSE);
GetToolBar()->EnableTool(ID_STOP, TRUE);
GetMenuBar()->GetMenu(0)->Enable(ID_START, FALSE);
GetMenuBar()->GetMenu(0)->Enable(ID_STOP, TRUE);
m_timer->Start(m_interval);
m_running = TRUE;
}
void LifeFrame::OnStop()
{
GetToolBar()->EnableTool(ID_START, TRUE);
GetToolBar()->EnableTool(ID_STOP, FALSE);
GetMenuBar()->GetMenu(0)->Enable(ID_START, TRUE);
GetMenuBar()->GetMenu(0)->Enable(ID_STOP, FALSE);
m_timer->Stop();
m_running = FALSE;
}
void LifeFrame::OnTimer()
{
m_tics++;
UpdateInfoText();
m_life->NextTic();
m_canvas->DrawEverything();
m_canvas->Refresh(FALSE);
}
// --------------------------------------------------------------------------
// LifeTimer
// --------------------------------------------------------------------------
LifeTimer::LifeTimer(LifeFrame *parent) : wxTimer()
{
m_parent = parent;
}
void LifeTimer::Notify()
{
m_parent->OnTimer();
}
// --------------------------------------------------------------------------
// LifeCavas
// --------------------------------------------------------------------------
// canvas constructor
LifeCanvas::LifeCanvas(wxWindow *parent, Life *life)
: wxScrolledWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100))
{
m_life = life;
m_cellsize = 8;
Reset();
}
LifeCanvas::~LifeCanvas()
{
delete m_bmp;
}
void LifeCanvas::Reset()
{
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 = GetSize().GetX();
wxCoord h = GetSize().GetY();
m_xoffset = (w > m_width)? ((w - m_width) / 2) : 0;
m_yoffset = (h > m_height)? ((h - m_height) / 2) : 0;
// redraw all, incl. background
DrawEverything(TRUE);
SetScrollbars(10, 10, (m_width + 9) / 10, (m_height + 9) / 10);
}
// draw everything
void LifeCanvas::DrawEverything(bool force)
{
wxMemoryDC dc;
dc.SelectObject(*m_bmp);
dc.BeginDrawing();
// cells
for (int j = 0; j < m_life->GetHeight(); j++)
for (int i = 0; i < m_life->GetWidth(); i++)
if (force || m_life->HasChanged(i, j))
DrawCell(i, j, dc);
// bounding rectangle (always drawn)
dc.SetPen(*wxBLACK_PEN);
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.DrawRectangle(0, 0, m_width, m_height);
dc.EndDrawing();
dc.SelectObject(wxNullBitmap);
}
// draw a single cell
void LifeCanvas::DrawCell(int i, int j)
{
wxMemoryDC dc;
dc.SelectObject(*m_bmp);
dc.BeginDrawing();
DrawCell(i, j, dc);
dc.EndDrawing();
dc.SelectObject(wxNullBitmap);
}
void LifeCanvas::DrawCell(int i, int j, wxDC &dc)
{
if (m_life->IsAlive(i, j))
{
dc.SetPen(*wxBLACK_PEN);
dc.SetBrush(*wxBLACK_BRUSH);
dc.DrawRectangle(CellToCoord(i),
CellToCoord(j),
m_cellsize,
m_cellsize);
}
else
{
dc.SetPen(*wxLIGHT_GREY_PEN);
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.DrawRectangle(CellToCoord(i),
CellToCoord(j),
m_cellsize,
m_cellsize);
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush(*wxWHITE_BRUSH);
dc.DrawRectangle(CellToCoord(i) + 1,
CellToCoord(j) + 1,
m_cellsize - 1,
m_cellsize - 1);
}
}
// event handlers
void LifeCanvas::OnPaint(wxPaintEvent& event)
{
wxPaintDC dc(this);
wxMemoryDC memdc;
wxRegionIterator upd(GetUpdateRegion());
int x, y, w, h, xx, yy;
dc.BeginDrawing();
memdc.SelectObject(*m_bmp);
while(upd)
{
x = upd.GetX();
y = upd.GetY();
w = upd.GetW();
h = upd.GetH();
CalcUnscrolledPosition(x, y, &xx, &yy);
dc.Blit(x, y, w, h, &memdc, xx - m_xoffset, yy - m_yoffset);
upd++;
}
memdc.SelectObject(wxNullBitmap);
dc.EndDrawing();
}
void LifeCanvas::OnMouse(wxMouseEvent& event)
{
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 );
// 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 (!event.LeftIsDown())
{
m_status = MOUSE_NOACTION;
}
else if (i >= 0 && i < m_life->GetWidth() &&
j >= 0 && j < m_life->GetHeight())
{
bool alive = m_life->IsAlive(i, j);
// if just pressed, update status
if (m_status == MOUSE_NOACTION)
m_status = (alive? MOUSE_ERASING : MOUSE_DRAWING);
// toggle cell and refresh if needed
if (((m_status == MOUSE_ERASING) && alive) ||
((m_status == MOUSE_DRAWING) && !alive))
{
wxRect rect(x, y, m_cellsize + 1, m_cellsize + 1);
m_life->SetCell(i, j, !alive);
DrawCell(i, j);
Refresh(FALSE, &rect);
}
}
}
void LifeCanvas::OnSize(wxSizeEvent& event)
{
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;
// allow default processing
event.Skip();
}
// --------------------------------------------------------------------------
// LifeNewGameDialog
// --------------------------------------------------------------------------
LifeNewGameDialog::LifeNewGameDialog(wxWindow *parent, int *w, int *h)
: wxDialog(parent, -1, _("New game"),
wxDefaultPosition, wxDefaultSize,
wxDEFAULT_DIALOG_STYLE | wxDIALOG_MODAL)
{
m_w = w;
m_h = h;
wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
// text message
topsizer->Add( CreateTextSizer(_("Enter board dimensions")), 0, wxALL, 10 );
topsizer->Add( new wxStaticLine(this, -1), 0, wxGROW | wxLEFT | wxRIGHT | wxBOTTOM, 10);
// prompts and text controls
wxString strw, strh;
strw.Printf(_("%u"), *m_w);
strh.Printf(_("%u"), *m_h);
m_spinctrlw = new wxSpinCtrl( this, -1, strw );
m_spinctrlh = new wxSpinCtrl( this, -1, strh );
wxBoxSizer *inputsizer1 = new wxBoxSizer( wxHORIZONTAL );
inputsizer1->Add( new wxStaticText(this, -1, _("Width")), 1, wxCENTER | wxLEFT, 20);
inputsizer1->Add( m_spinctrlw, 2, wxCENTER | wxLEFT | wxRIGHT, 20 );
wxBoxSizer *inputsizer2 = new wxBoxSizer( wxHORIZONTAL );
inputsizer2->Add( new wxStaticText(this, -1, _("Height")), 1, wxCENTER | wxLEFT, 20);
inputsizer2->Add( m_spinctrlh, 2, wxCENTER | wxLEFT | wxRIGHT, 20 );
topsizer->Add( inputsizer1, 1, wxGROW | wxLEFT | wxRIGHT, 5 );
topsizer->Add( inputsizer2, 1, wxGROW | wxLEFT | wxRIGHT, 5 );
topsizer->Add( new wxStaticLine(this, -1), 0, wxGROW | wxLEFT | wxRIGHT | wxTOP, 10);
// buttons
topsizer->Add( CreateButtonSizer(wxOK | wxCANCEL), 0, wxCENTRE | wxALL, 10);
// activate
SetSizer(topsizer);
SetAutoLayout(TRUE);
topsizer->SetSizeHints(this);
topsizer->Fit(this);
Centre(wxBOTH);
}
void LifeNewGameDialog::OnOK(wxCommandEvent& WXUNUSED(event))
{
*m_w = m_spinctrlw->GetValue();
*m_h = m_spinctrlh->GetValue();
EndModal(wxID_OK);
}
void LifeNewGameDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
{
*m_w = -1;
*m_h = -1;
EndModal(wxID_CANCEL);
}
// --------------------------------------------------------------------------
// Life
// --------------------------------------------------------------------------
Life::Life(int width, int height)
{
Create(width, height);
}
Life::~Life()
{
Destroy();
}
void Life::Create(int width, int height)
{
wxASSERT(width > 0 || height > 0);
m_width = width;
m_height = height;
m_cells = new Cell[m_width * m_height];
Clear();
}
void Life::Destroy()
{
delete[] m_cells;
}
void Life::Clear()
{
for (int i = 0; i < m_width * m_height; i++)
m_cells[i] = CELL_DEAD;
}
bool Life::IsAlive(int x, int y) const
{
wxASSERT(x < m_width || y < m_height);
return (m_cells[y * m_width + x] & CELL_ALIVE);
}
bool Life::HasChanged(int x, int y) const
{
wxASSERT(x < m_width || y < m_height);
return (m_cells[y * m_width + x] & CELL_MARK);
}
void Life::SetCell(int x, int y, bool alive)
{
wxASSERT(x < m_width || y < m_height);
// set the CELL_MARK flag to notify that this cell has changed
m_cells[y * m_width + x] = (alive? CELL_ALIVE : CELL_DEAD);
}
void Life::NextTic()
{
/* 1st pass. Find and mark deaths and births for this generation.
*
* Rules:
* An organism with <= 1 neighbors will die due to isolation.
* An organism with >= 4 neighbors will die due to starvation.
* New organisms are born in cells with exactly 3 neighbors.
*/
for (int j = 0; j < m_height; j++)
for (int i = 0; i < m_width; i++)
{
int neighbors = GetNeighbors(i, j);
bool alive = IsAlive(i, j);
/* Set CELL_MARK if this cell must change, clear it
* otherwise. We cannot toggle the CELL_ALIVE bit yet
* because all deaths and births are simultaneous (it
* would affect neighbouring cells).
*/
if ((!alive && neighbors == 3) ||
(alive && (neighbors <= 1 || neighbors >= 4)))
m_cells[j * m_width + i] |= CELL_MARK;
else
m_cells[j * m_width + i] &= ~CELL_MARK;
}
/* 2nd pass. Stabilize.
*/
for (int j = 0; j < m_height; j++)
for (int i = 0; i < m_width; i++)
{
/* Toggle CELL_ALIVE for those cells marked in the
* previous pass. Do not clear the CELL_MARK bit yet;
* it is useful to know which cells have changed and
* thus must be updated in the screen.
*/
if (m_cells[j * m_width + i] & CELL_MARK)
m_cells[j * m_width + i] ^= CELL_ALIVE;
}
}
int Life::GetNeighbors(int x, int y) const
{
wxASSERT(x < m_width || y < m_height);
// count number of neighbors (wrap around board limits)
int neighbors = 0;
for (int j = y - 1; j <= y + 1; j++)
for (int i = x - 1; i <= x + 1; i++)
{
if (IsAlive( ((i < 0)? (i + m_width ) : (i % m_width)),
((j < 0)? (j + m_height) : (j % m_height)) ))
neighbors++;
}
// do not count ourselves
if (IsAlive(x, y)) neighbors--;
return neighbors;
}
void Life::SetCell(int x, int y, Cell status)
{
wxASSERT(x < m_width || y < m_height);
m_cells[y * m_width + x] = status;
}
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