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5a1dca12
GRG		 1/////////////////////////////////////////////////////////////////////////////
2// Name: life.cpp
3// Purpose: The game of life, created by J. H. Conway
4// Author: Guillermo Rodriguez Garcia, <guille@iies.es>
5// Modified by:
6// Created: Jan/2000
7// RCS-ID: $Id$
8// Copyright: (c) 2000, Guillermo Rodriguez Garcia
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12// ==========================================================================
13// declarations
14// ==========================================================================
15
16// minimum and maximum table size, in each dimension
17#define LIFE_MIN 10
18#define LIFE_MAX 200
19
20// some shortcuts
21#define ADD_TOOL(a, b, c, d) \
22 toolBar->AddTool(a, b, wxNullBitmap, FALSE, -1, -1, (wxObject *)0, c, d)
23
24#define GET_FRAME() \
25 ((wxFrame *) wxGetApp().GetTopWindow())
26
27// --------------------------------------------------------------------------
28// headers
29// --------------------------------------------------------------------------
30
31#ifdef __GNUG__
32 #pragma implementation "life.cpp"
33 #pragma interface "life.cpp"
34#endif
35
36// for compilers that support precompilation, includes "wx/wx.h".
37#include "wx/wxprec.h"
38
39#ifdef __BORLANDC__
40 #pragma hdrstop
41#endif
42
43// for all others, include the necessary headers
44#ifndef WX_PRECOMP
45 #include "wx/wx.h"
46#endif
47
48#include "wx/statline.h"
49#include "wx/spinctrl.h"
50
51// --------------------------------------------------------------------------
52// resources
53// --------------------------------------------------------------------------
54
55#if defined(__WXGTK__) || defined(__WXMOTIF__)
56 // the application icon
57 #include "mondrian.xpm"
58
59 // bitmap buttons for the toolbar
60 #include "bitmaps/reset.xpm"
61 #include "bitmaps/play.xpm"
62 #include "bitmaps/stop.xpm"
63#endif
64
65// --------------------------------------------------------------------------
66// private classes
67// --------------------------------------------------------------------------
68
69class Life;
70class LifeCanvas;
71class LifeTimer;
72class LifeFrame;
73class LifeApp;
74
75
76// Life
77class Life
78{
79public:
80 // ctors and dtors
81 Life(int width, int height);
82 ~Life();
83 void Create(int width, int height);
84 void Destroy();
85
86 // public accessors
87 inline int GetWidth() const { return m_width; };
88 inline int GetHeight() const { return m_height; };
89 inline bool IsAlive(int x, int y) const;
90 inline bool HasChanged(int x, int y) const;
91 inline void SetCell(int x, int y, bool alive = TRUE);
92
93 // game operations
94 void Clear();
95 void NextTic();
96
97private:
98 enum CellFlags {
99 CELL_DEAD = 0x0000, // is dead
100 CELL_ALIVE = 0x0001, // is alive
101 CELL_MARK = 0x0002, // will change / has changed
102 };
103 typedef int Cell;
104
105 int GetNeighbors(int x, int y) const;
106 inline void SetCell(int x, int y, Cell status);
107
108 int m_width;
109 int m_height;
110 Cell *m_cells;
111};
112
113// Life canvas
114class LifeCanvas : public wxScrolledWindow
115{
116public:
117 // ctor and dtor
118 LifeCanvas(wxWindow* parent, Life* life);
119 ~LifeCanvas();
120
121 // member functions
122 void Reset();
123 void DrawEverything(bool force = FALSE);
124 void DrawCell(int i, int j);
125 void DrawCell(int i, int j, wxDC &dc);
126 inline int CellToCoord(int i) const { return (i * m_cellsize); };
127 inline int CoordToCell(int x) const { return ((x >= 0)? (x / m_cellsize) : -1); };
128
129 // event handlers
130 void OnPaint(wxPaintEvent& event);
131 void OnMouse(wxMouseEvent& event);
132 void OnSize(wxSizeEvent& event);
133
134private:
135 // any class wishing to process wxWindows events must use this macro
136 DECLARE_EVENT_TABLE()
137
138 enum MouseStatus {
139 MOUSE_NOACTION,
140 MOUSE_DRAWING,
141 MOUSE_ERASING
142 };
143
144 Life *m_life;
145 wxFrame *m_frame;
146 wxBitmap *m_bmp;
147 int m_height;
148 int m_width;
149 int m_cellsize;
150 wxCoord m_xoffset;
151 wxCoord m_yoffset;
152 MouseStatus m_status;
153};
154
155// Life timer
156class LifeTimer : public wxTimer
157{
158public:
159 LifeTimer(LifeFrame *parent);
160 void Notify();
161
162private:
163 LifeFrame *m_parent;
164};
165
166// Life main frame
167class LifeFrame : public wxFrame
168{
169public:
170 // ctor and dtor
171 LifeFrame();
172 ~LifeFrame();
173
174 // member functions
175 void UpdateInfoText();
176
177 // event handlers
178 void OnMenu(wxCommandEvent& event);
179 void OnSlider(wxScrollEvent& event);
180 void OnNewGame();
181 void OnStart();
182 void OnStop();
183 void OnTimer();
184
185private:
186 // any class wishing to process wxWindows events must use this macro
187 DECLARE_EVENT_TABLE()
188
189 Life *m_life;
190 LifeTimer *m_timer;
191 LifeCanvas *m_canvas;
192 wxStaticText *m_text;
193 bool m_running;
194 long m_interval;
195 long m_tics;
196};
197
198// Life new game dialog
199class LifeNewGameDialog : public wxDialog
200{
201public:
202 // ctor
203 LifeNewGameDialog(wxWindow *parent, int *w, int *h);
204
205 // event handlers
206 void OnOK(wxCommandEvent& event);
207 void OnCancel(wxCommandEvent& event);
208
209private:
210 // any class wishing to process wxWindows events must use this macro
211 DECLARE_EVENT_TABLE();
212
213 int *m_w;
214 int *m_h;
215 wxSpinCtrl *m_spinctrlw;
216 wxSpinCtrl *m_spinctrlh;
217};
218
219// Life app
220class LifeApp : public wxApp
221{
222public:
223 virtual bool OnInit();
224};
225
226
227// --------------------------------------------------------------------------
228// constants
229// --------------------------------------------------------------------------
230
231// IDs for the controls and the menu commands
232enum
233{
234 // menu items and toolbar buttons
235 ID_NEWGAME = 101,
236 ID_CLEAR,
237 ID_START,
238 ID_STOP,
239 ID_ABOUT,
240 ID_EXIT,
241
242 // slider
243 ID_SLIDER
244};
245
246// --------------------------------------------------------------------------
247// event tables and other macros for wxWindows
248// --------------------------------------------------------------------------
249
250// Event tables
251
252BEGIN_EVENT_TABLE(LifeFrame, wxFrame)
253 EVT_MENU_RANGE (ID_NEWGAME, ID_ABOUT, LifeFrame::OnMenu)
254 EVT_COMMAND_SCROLL (ID_SLIDER, LifeFrame::OnSlider)
255END_EVENT_TABLE()
256
257BEGIN_EVENT_TABLE(LifeCanvas, wxScrolledWindow)
258 EVT_PAINT ( LifeCanvas::OnPaint)
259 EVT_SIZE ( LifeCanvas::OnSize)
260 EVT_MOUSE_EVENTS ( LifeCanvas::OnMouse)
261END_EVENT_TABLE()
262
263BEGIN_EVENT_TABLE(LifeNewGameDialog, wxDialog)
264 EVT_BUTTON (wxID_OK, LifeNewGameDialog::OnOK)
265 EVT_BUTTON (wxID_CANCEL, LifeNewGameDialog::OnCancel)
266END_EVENT_TABLE()
267
268
269// Create a new application object
270IMPLEMENT_APP(LifeApp)
271
272// ==========================================================================
273// implementation
274// ==========================================================================
275
276// --------------------------------------------------------------------------
277// LifeApp
278// --------------------------------------------------------------------------
279
280// `Main program' equivalent: the program execution "starts" here
281bool LifeApp::OnInit()
282{
283 // create the main application window
284 LifeFrame *frame = new LifeFrame();
285
286 // show it and tell the application that it's our main window
287 frame->Show(TRUE);
288 SetTopWindow(frame);
289
290 // enter the main message loop and run the app
291 return TRUE;
292}
293
294// --------------------------------------------------------------------------
295// LifeFrame
296// --------------------------------------------------------------------------
297
298// frame constructor
299LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(50, 50))
300{
301 // frame icon
302 SetIcon(wxICON(mondrian));
303
304 // menu bar
305 wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
306
307 menuFile->Append(ID_NEWGAME, _("&New game...\tCtrl-N"), _("Start a new game"));
308 menuFile->Append(ID_CLEAR, _("&Clear\tCtrl-C"), _("Clear game board"));
309 menuFile->Append(ID_START, _("&Start\tCtrl-S"), _("Start"));
310 menuFile->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop"));
311 menuFile->AppendSeparator();
312 menuFile->Append(ID_ABOUT, _("&About...\tCtrl-A"), _("Show about dialog"));
313 menuFile->AppendSeparator();
314 menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));
315 menuFile->Enable(ID_STOP, FALSE);
316
317 wxMenuBar *menuBar = new wxMenuBar();
318 menuBar->Append(menuFile, _("&File"));
319 SetMenuBar(menuBar);
320
321 // tool bar
322 wxBitmap tbBitmaps[3];
323 tbBitmaps[0] = wxBITMAP(reset);
324 tbBitmaps[1] = wxBITMAP(play);
325 tbBitmaps[2] = wxBITMAP(stop);
326
327 wxToolBar *toolBar = CreateToolBar();
328 toolBar->SetMargins(5, 5);
329 toolBar->SetToolBitmapSize(wxSize(16, 16));
330 ADD_TOOL(ID_CLEAR, tbBitmaps[0], _("Clear"), _("Clear game board"));
331 ADD_TOOL(ID_START, tbBitmaps[1], _("Start"), _("Start"));
332 ADD_TOOL(ID_STOP , tbBitmaps[2], _("Stop"), _("Stop"));
333 toolBar->EnableTool(ID_STOP, FALSE);
334 toolBar->Realize();
335
336 // status bar
337 CreateStatusBar(2);
338 SetStatusText(_("Welcome to Life!"));
339
340 // panel
341 wxPanel *panel = new wxPanel(this, -1);
342
343 // game
344 m_life = new Life(20, 20);
345 m_canvas = new LifeCanvas(panel, m_life);
346 m_timer = new LifeTimer(this);
347 m_interval = 500;
348 m_tics = 0;
349 m_text = new wxStaticText(panel, -1, "");
350 UpdateInfoText();
351
352 // slider
353 wxSlider *slider = new wxSlider(panel, ID_SLIDER, 5, 1, 10,
354 wxDefaultPosition, wxDefaultSize, wxSL_HORIZONTAL | wxSL_AUTOTICKS);
355
356 // component layout
357 wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
358 sizer->Add(m_canvas, 1, wxGROW | wxCENTRE | wxALL, 5);
359 sizer->Add(new wxStaticLine(panel, -1), 0, wxGROW | wxCENTRE);
360 sizer->Add(m_text, 0, wxCENTRE | wxNORTH, 5);
361 sizer->Add(slider, 0, wxCENTRE | wxALL, 5);
362 panel->SetSizer(sizer);
363 panel->SetAutoLayout(TRUE);
364 sizer->Fit(this);
365 sizer->SetSizeHints(this);
366}
367
368LifeFrame::~LifeFrame()
369{
370 delete m_timer;
371 delete m_life;
372}
373
374void LifeFrame::UpdateInfoText()
375{
376 wxString msg;
377
378 msg.Printf(_("Generation: %u, Interval: %u ms"), m_tics, m_interval);
379 m_text->SetLabel(msg);
380}
381
382// event handlers
383void LifeFrame::OnMenu(wxCommandEvent& event)
384{
385 switch (event.GetId())
386 {
387 case ID_START : OnStart(); break;
388 case ID_STOP : OnStop(); break;
389 case ID_NEWGAME : OnNewGame(); break;
390 case ID_CLEAR :
391 {
392 OnStop();
393 m_life->Clear();
394 m_canvas->DrawEverything(TRUE);
395 m_canvas->Refresh(FALSE);
396 m_tics = 0;
397 UpdateInfoText();
398 break;
399 }
400 case ID_ABOUT :
401 {
402 wxMessageBox(
403 _("This is the about dialog of the Life! sample.\n"
404 "(c) 2000 Guillermo Rodriguez Garcia"),
405 _("About Life!"),
406 wxOK | wxICON_INFORMATION,
407 this);
408 break;
409 }
410 case ID_EXIT :
411 {
412 // TRUE is to force the frame to close
413 Close(TRUE);
414 break;
415 }
416 }
417}
418
419void LifeFrame::OnSlider(wxScrollEvent& event)
420{
421 m_interval = event.GetPosition() * 100;
422
423 // restart timer if running, to set the new interval
424 if (m_running)
425 {
426 m_timer->Stop();
427 m_timer->Start(m_interval);
428 }
429
430 UpdateInfoText();
431}
432
433void LifeFrame::OnNewGame()
434{
435 int w = m_life->GetWidth();
436 int h = m_life->GetHeight();
437 int result;
438
439 // stop if it was running
440 OnStop();
441
442 // show dialog box
443 LifeNewGameDialog dialog(this, &w, &h);
444 result = dialog.ShowModal();
445
446 // create new game
447 if (result == wxID_OK)
448 {
449 // check dimensions
450 if (w >= LIFE_MIN && w <= LIFE_MAX &&
451 h >= LIFE_MIN && h <= LIFE_MAX)
452 {
453 m_life->Destroy();
454 m_life->Create(w, h);
455 m_canvas->Reset();
456 m_tics = 0;
457 UpdateInfoText();
458 }
459 else
460 {
461 wxString msg;
462 msg.Printf(_("Both dimensions must be within %u and %u.\n"),
463 LIFE_MIN, LIFE_MAX);
464 wxMessageBox(msg, _("Error!"), wxOK | wxICON_EXCLAMATION, this);
465 }
466 }
467}
468
469void LifeFrame::OnStart()
470{
471 GetToolBar()->EnableTool(ID_START, FALSE);
472 GetToolBar()->EnableTool(ID_STOP, TRUE);
473 GetMenuBar()->GetMenu(0)->Enable(ID_START, FALSE);
474 GetMenuBar()->GetMenu(0)->Enable(ID_STOP, TRUE);
475
476 m_timer->Start(m_interval);
477 m_running = TRUE;
478}
479
480void LifeFrame::OnStop()
481{
482 GetToolBar()->EnableTool(ID_START, TRUE);
483 GetToolBar()->EnableTool(ID_STOP, FALSE);
484 GetMenuBar()->GetMenu(0)->Enable(ID_START, TRUE);
485 GetMenuBar()->GetMenu(0)->Enable(ID_STOP, FALSE);
486
487 m_timer->Stop();
488 m_running = FALSE;
489}
490
491void LifeFrame::OnTimer()
492{
493 m_tics++;
494 UpdateInfoText();
495
496 m_life->NextTic();
497 m_canvas->DrawEverything();
498 m_canvas->Refresh(FALSE);
499}
500
501// --------------------------------------------------------------------------
502// LifeTimer
503// --------------------------------------------------------------------------
504
505LifeTimer::LifeTimer(LifeFrame *parent) : wxTimer()
506{
507 m_parent = parent;
508}
509
510void LifeTimer::Notify()
511{
512 m_parent->OnTimer();
513}
514
515// --------------------------------------------------------------------------
516// LifeCavas
517// --------------------------------------------------------------------------
518
519// canvas constructor
520LifeCanvas::LifeCanvas(wxWindow *parent, Life *life)
521 : wxScrolledWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100))
522{
523 m_life = life;
524 m_cellsize = 8;
525 Reset();
526}
527
528LifeCanvas::~LifeCanvas()
529{
530 delete m_bmp;
531}
532
533void LifeCanvas::Reset()
534{
535 if (m_bmp)
536 delete m_bmp;
537
538 m_status = MOUSE_NOACTION;
539 m_width = CellToCoord(m_life->GetWidth()) + 1;
540 m_height = CellToCoord(m_life->GetHeight()) + 1;
541 m_bmp = new wxBitmap(m_width, m_height);
542 wxCoord w = GetSize().GetX();
543 wxCoord h = GetSize().GetY();
544 m_xoffset = (w > m_width)? ((w - m_width) / 2) : 0;
545 m_yoffset = (h > m_height)? ((h - m_height) / 2) : 0;
546
547 // redraw all, incl. background
548 DrawEverything(TRUE);
549 SetScrollbars(10, 10, (m_width + 9) / 10, (m_height + 9) / 10);
550}
551
552// draw everything
553void LifeCanvas::DrawEverything(bool force)
554{
555 wxMemoryDC dc;
556
557 dc.SelectObject(*m_bmp);
558 dc.BeginDrawing();
559
560 // cells
561 for (int j = 0; j < m_life->GetHeight(); j++)
562 for (int i = 0; i < m_life->GetWidth(); i++)
563 if (force || m_life->HasChanged(i, j))
564 DrawCell(i, j, dc);
565
566 // bounding rectangle (always drawn)
567 dc.SetPen(*wxBLACK_PEN);
568 dc.SetBrush(*wxTRANSPARENT_BRUSH);
569 dc.DrawRectangle(0, 0, m_width, m_height);
570
571 dc.EndDrawing();
572 dc.SelectObject(wxNullBitmap);
573}
574
575// draw a single cell
576void LifeCanvas::DrawCell(int i, int j)
577{
578 wxMemoryDC dc;
579
580 dc.SelectObject(*m_bmp);
581 dc.BeginDrawing();
582
583 DrawCell(i, j, dc);
584
585 dc.EndDrawing();
586 dc.SelectObject(wxNullBitmap);
587}
588
589void LifeCanvas::DrawCell(int i, int j, wxDC &dc)
590{
591 if (m_life->IsAlive(i, j))
592 {
593 dc.SetPen(*wxBLACK_PEN);
594 dc.SetBrush(*wxBLACK_BRUSH);
595 dc.DrawRectangle(CellToCoord(i),
596 CellToCoord(j),
597 m_cellsize,
598 m_cellsize);
599 }
600 else
601 {
602 dc.SetPen(*wxLIGHT_GREY_PEN);
603 dc.SetBrush(*wxTRANSPARENT_BRUSH);
604 dc.DrawRectangle(CellToCoord(i),
605 CellToCoord(j),
606 m_cellsize,
607 m_cellsize);
608 dc.SetPen(*wxWHITE_PEN);
609 dc.SetBrush(*wxWHITE_BRUSH);
610 dc.DrawRectangle(CellToCoord(i) + 1,
611 CellToCoord(j) + 1,
612 m_cellsize - 1,
613 m_cellsize - 1);
614 }
615}
616
617// event handlers
618void LifeCanvas::OnPaint(wxPaintEvent& event)
619{
620 wxPaintDC dc(this);
621 wxMemoryDC memdc;
622
623 wxRegionIterator upd(GetUpdateRegion());
624 int x, y, w, h, xx, yy;
625
626 dc.BeginDrawing();
627 memdc.SelectObject(*m_bmp);
628
629 while(upd)
630 {
631 x = upd.GetX();
632 y = upd.GetY();
633 w = upd.GetW();
634 h = upd.GetH();
635 CalcUnscrolledPosition(x, y, &xx, &yy);
636
637 dc.Blit(x, y, w, h, &memdc, xx - m_xoffset, yy - m_yoffset);
638 upd++;
639 }
640
641 memdc.SelectObject(wxNullBitmap);
642 dc.EndDrawing();
643}
644
645void LifeCanvas::OnMouse(wxMouseEvent& event)
646{
647 int x, y, xx, yy, i, j;
648
649 // which cell are we pointing at?
650 x = event.GetX();
651 y = event.GetY();
652 CalcUnscrolledPosition(x, y, &xx, &yy);
653 i = CoordToCell( xx - m_xoffset );
654 j = CoordToCell( yy - m_yoffset );
655
656 // adjust x, y to point to the upper left corner of the cell
657 CalcScrolledPosition( CellToCoord(i) + m_xoffset,
658 CellToCoord(j) + m_yoffset,
659 &x, &y );
660
661 // set cursor shape and statusbar text
662 if (i < 0 || i >= m_life->GetWidth() ||
663 j < 0 || j >= m_life->GetHeight())
664 {
665 GET_FRAME()->SetStatusText(wxEmptyString, 1);
666 SetCursor(*wxSTANDARD_CURSOR);
667 }
668 else
669 {
670 wxString msg;
671 msg.Printf(_("Cell: (%u, %u)"), i, j);
672 GET_FRAME()->SetStatusText(msg, 1);
673 SetCursor(*wxCROSS_CURSOR);
674 }
675
676 // button pressed?
677 if (!event.LeftIsDown())
678 {
679 m_status = MOUSE_NOACTION;
680 }
681 else if (i >= 0 && i < m_life->GetWidth() &&
682 j >= 0 && j < m_life->GetHeight())
683 {
684 bool alive = m_life->IsAlive(i, j);
685
686 // if just pressed, update status
687 if (m_status == MOUSE_NOACTION)
688 m_status = (alive? MOUSE_ERASING : MOUSE_DRAWING);
689
690 // toggle cell and refresh if needed
691 if (((m_status == MOUSE_ERASING) && alive) ||
692 ((m_status == MOUSE_DRAWING) && !alive))
693 {
694 wxRect rect(x, y, m_cellsize + 1, m_cellsize + 1);
695 m_life->SetCell(i, j, !alive);
696 DrawCell(i, j);
697 Refresh(FALSE, &rect);
698 }
699 }
700}
701
702void LifeCanvas::OnSize(wxSizeEvent& event)
703{
704 wxCoord w = event.GetSize().GetX();
705 wxCoord h = event.GetSize().GetY();
706 m_xoffset = (w > m_width)? ((w - m_width) / 2) : 0;
707 m_yoffset = (h > m_height)? ((h - m_height) / 2) : 0;
708
709 // allow default processing
710 event.Skip();
711}
712
713// --------------------------------------------------------------------------
714// LifeNewGameDialog
715// --------------------------------------------------------------------------
716
717LifeNewGameDialog::LifeNewGameDialog(wxWindow *parent, int *w, int *h)
718 : wxDialog(parent, -1, _("New game"),
719 wxDefaultPosition, wxDefaultSize,
720 wxDEFAULT_DIALOG_STYLE | wxDIALOG_MODAL)
721{
722 m_w = w;
723 m_h = h;
724
725 wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
726
727 // text message
728 topsizer->Add( CreateTextSizer(_("Enter board dimensions")), 0, wxALL, 10 );
729 topsizer->Add( new wxStaticLine(this, -1), 0, wxGROW | wxLEFT | wxRIGHT | wxBOTTOM, 10);
730
731 // prompts and text controls
732 wxString strw, strh;
733 strw.Printf(_("%u"), *m_w);
734 strh.Printf(_("%u"), *m_h);
735 m_spinctrlw = new wxSpinCtrl( this, -1, strw );
736 m_spinctrlh = new wxSpinCtrl( this, -1, strh );
737
738 wxBoxSizer *inputsizer1 = new wxBoxSizer( wxHORIZONTAL );
739 inputsizer1->Add( new wxStaticText(this, -1, _("Width")), 1, wxCENTER | wxLEFT, 20);
740 inputsizer1->Add( m_spinctrlw, 2, wxCENTER | wxLEFT | wxRIGHT, 20 );
741 wxBoxSizer *inputsizer2 = new wxBoxSizer( wxHORIZONTAL );
742 inputsizer2->Add( new wxStaticText(this, -1, _("Height")), 1, wxCENTER | wxLEFT, 20);
743 inputsizer2->Add( m_spinctrlh, 2, wxCENTER | wxLEFT | wxRIGHT, 20 );
744
745 topsizer->Add( inputsizer1, 1, wxGROW | wxLEFT | wxRIGHT, 5 );
746 topsizer->Add( inputsizer2, 1, wxGROW | wxLEFT | wxRIGHT, 5 );
747 topsizer->Add( new wxStaticLine(this, -1), 0, wxGROW | wxLEFT | wxRIGHT | wxTOP, 10);
748
749 // buttons
750 topsizer->Add( CreateButtonSizer(wxOK | wxCANCEL), 0, wxCENTRE | wxALL, 10);
751
752 // activate
753 SetSizer(topsizer);
754 SetAutoLayout(TRUE);
755 topsizer->SetSizeHints(this);
756 topsizer->Fit(this);
757 Centre(wxBOTH);
758}
759
760void LifeNewGameDialog::OnOK(wxCommandEvent& WXUNUSED(event))
761{
762 *m_w = m_spinctrlw->GetValue();
763 *m_h = m_spinctrlh->GetValue();
764
765 EndModal(wxID_OK);
766}
767
768void LifeNewGameDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
769{
770 *m_w = -1;
771 *m_h = -1;
772
773 EndModal(wxID_CANCEL);
774}
775
776// --------------------------------------------------------------------------
777// Life
778// --------------------------------------------------------------------------
779
780Life::Life(int width, int height)
781{
782 Create(width, height);
783}
784
785Life::~Life()
786{
787 Destroy();
788}
789
790void Life::Create(int width, int height)
791{
792 wxASSERT(width > 0 || height > 0);
793
794 m_width = width;
795 m_height = height;
796 m_cells = new Cell[m_width * m_height];
797 Clear();
798}
799
800void Life::Destroy()
801{
802 delete[] m_cells;
803}
804
805void Life::Clear()
806{
807 for (int i = 0; i < m_width * m_height; i++)
808 m_cells[i] = CELL_DEAD;
809}
810
811bool Life::IsAlive(int x, int y) const
812{
813 wxASSERT(x < m_width || y < m_height);
814
815 return (m_cells[y * m_width + x] & CELL_ALIVE);
816}
817
818bool Life::HasChanged(int x, int y) const
819{
820 wxASSERT(x < m_width || y < m_height);
821
822 return (m_cells[y * m_width + x] & CELL_MARK);
823}
824
825void Life::SetCell(int x, int y, bool alive)
826{
827 wxASSERT(x < m_width || y < m_height);
828
829 // set the CELL_MARK flag to notify that this cell has changed
830 m_cells[y * m_width + x] = (alive? CELL_ALIVE : CELL_DEAD);
831}
832
833void Life::NextTic()
834{
835 /* 1st pass. Find and mark deaths and births for this generation.
836 *
837 * Rules:
838 * An organism with <= 1 neighbors will die due to isolation.
839 * An organism with >= 4 neighbors will die due to starvation.
840 * New organisms are born in cells with exactly 3 neighbors.
841 */
842 for (int j = 0; j < m_height; j++)
843 for (int i = 0; i < m_width; i++)
844 {
845 int neighbors = GetNeighbors(i, j);
846 bool alive = IsAlive(i, j);
847
848 /* Set CELL_MARK if this cell must change, clear it
849 * otherwise. We cannot toggle the CELL_ALIVE bit yet
850 * because all deaths and births are simultaneous (it
851 * would affect neighbouring cells).
852 */
853 if ((!alive && neighbors == 3) ||
854 (alive && (neighbors <= 1 || neighbors >= 4)))
855 m_cells[j * m_width + i] |= CELL_MARK;
856 else
857 m_cells[j * m_width + i] &= ~CELL_MARK;
858 }
859
860 /* 2nd pass. Stabilize.
861 */
862 for (int j = 0; j < m_height; j++)
863 for (int i = 0; i < m_width; i++)
864 {
865 /* Toggle CELL_ALIVE for those cells marked in the
866 * previous pass. Do not clear the CELL_MARK bit yet;
867 * it is useful to know which cells have changed and
868 * thus must be updated in the screen.
869 */
870 if (m_cells[j * m_width + i] & CELL_MARK)
871 m_cells[j * m_width + i] ^= CELL_ALIVE;
872 }
873}
874
875int Life::GetNeighbors(int x, int y) const
876{
877 wxASSERT(x < m_width || y < m_height);
878
879 // count number of neighbors (wrap around board limits)
880 int neighbors = 0;
881 for (int j = y - 1; j <= y + 1; j++)
882 for (int i = x - 1; i <= x + 1; i++)
883 {
884 if (IsAlive( ((i < 0)? (i + m_width ) : (i % m_width)),
885 ((j < 0)? (j + m_height) : (j % m_height)) ))
886 neighbors++;
887 }
888
889 // do not count ourselves
890 if (IsAlive(x, y)) neighbors--;
891
892 return neighbors;
893}
894
895void Life::SetCell(int x, int y, Cell status)
896{
897 wxASSERT(x < m_width || y < m_height);
898
899 m_cells[y * m_width + x] = status;
900}
901
wxWidgets (Impactor)