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[wxWidgets.git] / demos / life / life.cpp
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 // headers, declarations, constants
14 // ==========================================================================
15
16 #ifdef __GNUG__
17 #pragma implementation "life.h"
18 #endif
19
20 // For compilers that support precompilation, includes "wx/wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #ifndef WX_PRECOMP
28 #include "wx/wx.h"
29 #endif
30
31 #include "wx/statline.h"
32
33 #include "life.h"
34 #include "game.h"
35 #include "dialogs.h"
36
37 // --------------------------------------------------------------------------
38 // resources
39 // --------------------------------------------------------------------------
40
41 #if defined(__WXGTK__) || defined(__WXMOTIF__)
42 // application icon
43 #include "mondrian.xpm"
44
45 // bitmap buttons for the toolbar
46 #include "bitmaps/reset.xpm"
47 #include "bitmaps/play.xpm"
48 #include "bitmaps/stop.xpm"
49 #include "bitmaps/zoomin.xpm"
50 #include "bitmaps/zoomout.xpm"
51
52 // navigator
53 #include "bitmaps/north.xpm"
54 #include "bitmaps/south.xpm"
55 #include "bitmaps/east.xpm"
56 #include "bitmaps/west.xpm"
57 #include "bitmaps/center.xpm"
58 #endif
59
60 // --------------------------------------------------------------------------
61 // constants
62 // --------------------------------------------------------------------------
63
64 // IDs for the controls and the menu commands
65 enum
66 {
67 // timer
68 ID_TIMER = 1001,
69
70 // menu items and toolbar buttons
71 ID_RESET,
72 ID_SAMPLES,
73 ID_ABOUT,
74 ID_EXIT,
75 ID_START,
76 ID_STEP,
77 ID_STOP,
78 ID_ZOOMIN,
79 ID_ZOOMOUT,
80 ID_TOPSPEED,
81
82 // speed selection slider
83 ID_SLIDER,
84
85 // navigation
86 ID_SHOWNAV,
87 ID_ORIGIN,
88 ID_CENTER,
89 ID_NORTH,
90 ID_SOUTH,
91 ID_EAST,
92 ID_WEST,
93 };
94
95 // --------------------------------------------------------------------------
96 // event tables and other macros for wxWindows
97 // --------------------------------------------------------------------------
98
99 // Event tables
100 BEGIN_EVENT_TABLE(LifeFrame, wxFrame)
101 EVT_MENU (ID_SAMPLES, LifeFrame::OnSamples)
102 EVT_MENU (ID_RESET, LifeFrame::OnMenu)
103 EVT_MENU (ID_ABOUT, LifeFrame::OnMenu)
104 EVT_MENU (ID_EXIT, LifeFrame::OnMenu)
105 EVT_MENU (ID_START, LifeFrame::OnMenu)
106 EVT_MENU (ID_STEP, LifeFrame::OnMenu)
107 EVT_MENU (ID_STOP, LifeFrame::OnMenu)
108 EVT_MENU (ID_TOPSPEED, LifeFrame::OnMenu)
109 EVT_MENU (ID_SHOWNAV, LifeFrame::OnMenu)
110 EVT_MENU (ID_ORIGIN, LifeFrame::OnNavigate)
111 EVT_BUTTON (ID_CENTER, LifeFrame::OnNavigate)
112 EVT_BUTTON (ID_NORTH, LifeFrame::OnNavigate)
113 EVT_BUTTON (ID_SOUTH, LifeFrame::OnNavigate)
114 EVT_BUTTON (ID_EAST, LifeFrame::OnNavigate)
115 EVT_BUTTON (ID_WEST, LifeFrame::OnNavigate)
116 EVT_MENU (ID_ZOOMIN, LifeFrame::OnZoom)
117 EVT_MENU (ID_ZOOMOUT, LifeFrame::OnZoom)
118 EVT_COMMAND_SCROLL (ID_SLIDER, LifeFrame::OnSlider)
119 EVT_TIMER (ID_TIMER, LifeFrame::OnTimer)
120 EVT_CLOSE ( LifeFrame::OnClose)
121 END_EVENT_TABLE()
122
123 BEGIN_EVENT_TABLE(LifeNavigator, wxMiniFrame)
124 EVT_CLOSE ( LifeNavigator::OnClose)
125 END_EVENT_TABLE()
126
127 BEGIN_EVENT_TABLE(LifeCanvas, wxWindow)
128 EVT_PAINT ( LifeCanvas::OnPaint)
129 EVT_SCROLLWIN ( LifeCanvas::OnScroll)
130 EVT_SIZE ( LifeCanvas::OnSize)
131 EVT_MOUSE_EVENTS ( LifeCanvas::OnMouse)
132 EVT_ERASE_BACKGROUND( LifeCanvas::OnEraseBackground)
133 END_EVENT_TABLE()
134
135
136 // Create a new application object
137 IMPLEMENT_APP(LifeApp)
138
139
140 // ==========================================================================
141 // implementation
142 // ==========================================================================
143
144 // some shortcuts
145 #define ADD_TOOL(id, bmp, tooltip, help) \
146 toolBar->AddTool(id, bmp, wxNullBitmap, FALSE, -1, -1, (wxObject *)0, tooltip, help)
147
148
149 // --------------------------------------------------------------------------
150 // LifeApp
151 // --------------------------------------------------------------------------
152
153 // 'Main program' equivalent: the program execution "starts" here
154 bool LifeApp::OnInit()
155 {
156 // create the main application window
157 LifeFrame *frame = new LifeFrame();
158
159 // show it and tell the application that it's our main window
160 frame->Show(TRUE);
161 SetTopWindow(frame);
162
163 // enter the main message loop and run the app
164 return TRUE;
165 }
166
167 // --------------------------------------------------------------------------
168 // LifeFrame
169 // --------------------------------------------------------------------------
170
171 // frame constructor
172 LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(200, 200))
173 {
174 // frame icon
175 SetIcon(wxICON(mondrian));
176
177 // menu bar
178 wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
179 wxMenu *menuView = new wxMenu("", wxMENU_TEAROFF);
180 wxMenu *menuGame = new wxMenu("", wxMENU_TEAROFF);
181
182 menuFile->Append(ID_RESET, _("Reset"), _("Start a new game"));
183 menuFile->Append(ID_SAMPLES, _("Sample game..."), _("Select a sample configuration"));
184 menuFile->AppendSeparator();
185 menuFile->Append(ID_ABOUT, _("&About...\tCtrl-A"), _("Show about dialog"));
186 menuFile->AppendSeparator();
187 menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));
188
189 menuView->Append(ID_SHOWNAV, _("Navigation toolbox"), _("Show or hide toolbox"), TRUE);
190 menuView->Check (ID_SHOWNAV, TRUE);
191 menuView->AppendSeparator();
192 menuView->Append(ID_ORIGIN, _("Absolute origin"), _("Go to (0, 0)"));
193 menuView->Append(ID_CENTER, _("Center of mass"), _("Find center of mass"));
194 menuView->Append(ID_NORTH, _("North"), _("Find northernmost cell"));
195 menuView->Append(ID_SOUTH, _("South"), _("Find southernmost cell"));
196 menuView->Append(ID_EAST, _("East"), _("Find easternmost cell"));
197 menuView->Append(ID_WEST, _("West"), _("Find westernmost cell"));
198 menuView->AppendSeparator();
199 menuView->Append(ID_ZOOMIN, _("Zoom &in\tCtrl-I"));
200 menuView->Append(ID_ZOOMOUT, _("Zoom &out\tCtrl-O"));
201
202 menuGame->Append(ID_START, _("&Start\tCtrl-S"), _("Start"));
203 menuGame->Append(ID_STEP, _("&Next\tCtrl-N"), _("Single step"));
204 menuGame->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop"));
205 menuGame->Enable(ID_STOP, FALSE);
206 menuGame->AppendSeparator();
207 menuGame->Append(ID_TOPSPEED, _("Top speed!"), _("Go as fast as possible"));
208
209 wxMenuBar *menuBar = new wxMenuBar();
210 menuBar->Append(menuFile, _("&File"));
211 menuBar->Append(menuView, _("&View"));
212 menuBar->Append(menuGame, _("&Game"));
213 SetMenuBar(menuBar);
214
215 // tool bar
216 wxBitmap tbBitmaps[5];
217
218 tbBitmaps[0] = wxBITMAP(reset);
219 tbBitmaps[1] = wxBITMAP(play);
220 tbBitmaps[2] = wxBITMAP(stop);
221 tbBitmaps[3] = wxBITMAP(zoomin);
222 tbBitmaps[4] = wxBITMAP(zoomout);
223
224 wxToolBar *toolBar = CreateToolBar();
225 toolBar->SetMargins(5, 5);
226 toolBar->SetToolBitmapSize(wxSize(16, 16));
227 ADD_TOOL(ID_RESET, tbBitmaps[0], _("Reset"), _("Start a new game"));
228 ADD_TOOL(ID_START, tbBitmaps[1], _("Start"), _("Start"));
229 ADD_TOOL(ID_STOP, tbBitmaps[2], _("Stop"), _("Stop"));
230 toolBar->AddSeparator();
231 ADD_TOOL(ID_ZOOMIN, tbBitmaps[3], _("Zoom in"), _("Zoom in"));
232 ADD_TOOL(ID_ZOOMOUT, tbBitmaps[4], _("Zoom out"), _("Zoom out"));
233 toolBar->Realize();
234 toolBar->EnableTool(ID_STOP, FALSE); // must be after Realize() !
235
236 // status bar
237 CreateStatusBar(2);
238 SetStatusText(_("Welcome to Life!"));
239
240 // game and timer
241 m_life = new Life();
242 m_timer = new wxTimer(this, ID_TIMER);
243 m_running = FALSE;
244 m_topspeed = FALSE;
245 m_interval = 500;
246 m_tics = 0;
247
248 // We use two different panels to reduce flicker in wxGTK, because
249 // some widgets (like wxStaticText) don't have their own X11 window,
250 // and thus updating the text would result in a refresh of the canvas
251 // if they belong to the same parent.
252
253 wxPanel *panel1 = new wxPanel(this, -1);
254 wxPanel *panel2 = new wxPanel(this, -1);
255
256 // canvas
257 m_canvas = new LifeCanvas(panel1, m_life);
258
259 // info panel
260 m_text = new wxStaticText(panel2, -1,
261 wxEmptyString,
262 wxDefaultPosition,
263 wxDefaultSize,
264 wxALIGN_CENTER | wxST_NO_AUTORESIZE);
265
266 wxSlider *slider = new wxSlider(panel2, ID_SLIDER,
267 5, 1, 10,
268 wxDefaultPosition,
269 wxSize(200, -1),
270 wxSL_HORIZONTAL | wxSL_AUTOTICKS);
271
272 UpdateInfoText();
273
274 // component layout
275 wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL);
276 wxBoxSizer *sizer2 = new wxBoxSizer(wxVERTICAL);
277 wxBoxSizer *sizer3 = new wxBoxSizer(wxVERTICAL);
278
279 sizer1->Add( new wxStaticLine(panel1, -1), 0, wxGROW );
280 sizer1->Add( m_canvas, 1, wxGROW | wxALL, 2 );
281 sizer1->Add( new wxStaticLine(panel1, -1), 0, wxGROW );
282 panel1->SetSizer( sizer1 );
283 panel1->SetAutoLayout( TRUE );
284 sizer1->Fit( panel1 );
285
286 sizer2->Add( m_text, 0, wxGROW | wxTOP, 4 );
287 sizer2->Add( slider, 0, wxCENTRE | wxALL, 4 );
288
289 panel2->SetSizer( sizer2 );
290 panel2->SetAutoLayout( TRUE );
291 sizer2->Fit( panel2 );
292
293 sizer3->Add( panel1, 1, wxGROW );
294 sizer3->Add( panel2, 0, wxGROW );
295 SetSizer( sizer3 );
296 SetAutoLayout( TRUE );
297 sizer3->Fit( this );
298
299 // set minimum frame size
300 sizer3->SetSizeHints( this );
301
302 // navigator frame
303 m_navigator = new LifeNavigator(this);
304 }
305
306 LifeFrame::~LifeFrame()
307 {
308 delete m_timer;
309 }
310
311 void LifeFrame::UpdateInfoText()
312 {
313 wxString msg;
314
315 msg.Printf(_(" Generation: %u (T: %u ms), Population: %u "),
316 m_tics,
317 m_topspeed? 0 : m_interval,
318 m_life->GetNumCells());
319 m_text->SetLabel(msg);
320 }
321
322 // Enable or disable tools and menu entries according to the current
323 // state. See also wxEVT_UPDATE_UI events for a slightly different
324 // way to do this.
325 void LifeFrame::UpdateUI()
326 {
327 // start / stop
328 GetToolBar()->EnableTool(ID_START, !m_running);
329 GetToolBar()->EnableTool(ID_STOP, m_running);
330 GetMenuBar()->GetMenu(2)->Enable(ID_START, !m_running);
331 GetMenuBar()->GetMenu(2)->Enable(ID_STEP, !m_running);
332 GetMenuBar()->GetMenu(2)->Enable(ID_STOP, m_running);
333
334 // zooming
335 int cellsize = m_canvas->GetCellSize();
336 GetToolBar()->EnableTool(ID_ZOOMIN, cellsize < 32);
337 GetToolBar()->EnableTool(ID_ZOOMOUT, cellsize > 1);
338 GetMenuBar()->GetMenu(1)->Enable(ID_ZOOMIN, cellsize < 32);
339 GetMenuBar()->GetMenu(1)->Enable(ID_ZOOMOUT, cellsize > 1);
340 }
341
342 // event handlers
343 void LifeFrame::OnMenu(wxCommandEvent& event)
344 {
345 switch (event.GetId())
346 {
347 case ID_START : OnStart(); break;
348 case ID_STEP : OnStep(); break;
349 case ID_STOP : OnStop(); break;
350 case ID_SHOWNAV :
351 {
352 bool checked = GetMenuBar()->GetMenu(1)->IsChecked(ID_SHOWNAV);
353 m_navigator->Show(checked);
354 break;
355 }
356 case ID_TOPSPEED:
357 {
358 m_running = TRUE;
359 m_topspeed = TRUE;
360 UpdateUI();
361 while (m_running && m_topspeed)
362 {
363 OnStep();
364 wxYield();
365 }
366 break;
367 }
368 case ID_RESET:
369 {
370 // stop if it was running
371 OnStop();
372 m_life->Clear();
373 m_canvas->Recenter(0, 0);
374 m_tics = 0;
375 UpdateInfoText();
376 break;
377 }
378 case ID_ABOUT:
379 {
380 LifeAboutDialog dialog(this);
381 dialog.ShowModal();
382 break;
383 }
384 case ID_EXIT :
385 {
386 // TRUE is to force the frame to close
387 Close(TRUE);
388 break;
389 }
390 }
391 }
392
393 void LifeFrame::OnClose(wxCloseEvent& WXUNUSED(event))
394 {
395 // Stop if it was running; this is absolutely needed because
396 // the frame won't be actually destroyed until there are no
397 // more pending events, and this in turn won't ever happen
398 // if the timer is running faster than the window can redraw.
399 OnStop();
400 Destroy();
401 }
402
403 void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event))
404 {
405 // stop if it was running
406 OnStop();
407
408 // dialog box
409 LifeSamplesDialog dialog(this);
410
411 if (dialog.ShowModal() == wxID_OK)
412 {
413 const LifeShape shape = dialog.GetShape();
414
415 // put the shape
416 m_life->Clear();
417 m_life->SetShape(shape);
418
419 // recenter canvas
420 m_canvas->Recenter(0, 0);
421 m_tics = 0;
422 UpdateInfoText();
423 }
424 }
425
426 void LifeFrame::OnZoom(wxCommandEvent& event)
427 {
428 int cellsize = m_canvas->GetCellSize();
429
430 if ((event.GetId() == ID_ZOOMIN) && cellsize < 32)
431 {
432 m_canvas->SetCellSize(cellsize * 2);
433 UpdateUI();
434 }
435 else if ((event.GetId() == ID_ZOOMOUT) && cellsize > 1)
436 {
437 m_canvas->SetCellSize(cellsize / 2);
438 UpdateUI();
439 }
440 }
441
442 void LifeFrame::OnNavigate(wxCommandEvent& event)
443 {
444 Cell c;
445
446 switch (event.GetId())
447 {
448 case ID_NORTH: c = m_life->FindNorth(); break;
449 case ID_SOUTH: c = m_life->FindSouth(); break;
450 case ID_WEST: c = m_life->FindWest(); break;
451 case ID_EAST: c = m_life->FindEast(); break;
452 case ID_CENTER: c = m_life->FindCenter(); break;
453 case ID_ORIGIN: c.i = c.j = 0; break;
454 }
455
456 m_canvas->Recenter(c.i, c.j);
457 }
458
459 void LifeFrame::OnSlider(wxScrollEvent& event)
460 {
461 m_interval = event.GetPosition() * 100;
462
463 if (m_running)
464 {
465 OnStop();
466 OnStart();
467 }
468
469 UpdateInfoText();
470 }
471
472 void LifeFrame::OnTimer(wxTimerEvent& WXUNUSED(event))
473 {
474 OnStep();
475 }
476
477 void LifeFrame::OnStart()
478 {
479 if (!m_running)
480 {
481 m_timer->Start(m_interval);
482 m_running = TRUE;
483 UpdateUI();
484 }
485 }
486
487 void LifeFrame::OnStop()
488 {
489 if (m_running)
490 {
491 m_timer->Stop();
492 m_running = FALSE;
493 m_topspeed = FALSE;
494 UpdateUI();
495 }
496 }
497
498 void LifeFrame::OnStep()
499 {
500 if (m_life->NextTic())
501 m_tics++;
502 else
503 OnStop();
504
505 m_canvas->DrawChanged();
506 UpdateInfoText();
507 }
508
509
510 // --------------------------------------------------------------------------
511 // LifeNavigator miniframe
512 // --------------------------------------------------------------------------
513
514 LifeNavigator::LifeNavigator(wxWindow *parent)
515 : wxMiniFrame(parent, -1,
516 _("Navigation"),
517 wxDefaultPosition,
518 wxDefaultSize,
519 wxCAPTION | wxSIMPLE_BORDER)
520 {
521 wxPanel *panel = new wxPanel(this, -1);
522 wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL);
523 wxBoxSizer *sizer2 = new wxBoxSizer(wxHORIZONTAL);
524
525 // create bitmaps and masks for the buttons
526 wxBitmap
527 bmpn = wxBITMAP(north),
528 bmpw = wxBITMAP(west),
529 bmpc = wxBITMAP(center),
530 bmpe = wxBITMAP(east),
531 bmps = wxBITMAP(south);
532
533 #ifdef __WXMSW__
534 bmpn.SetMask(new wxMask(bmpn, *wxLIGHT_GREY));
535 bmpw.SetMask(new wxMask(bmpw, *wxLIGHT_GREY));
536 bmpc.SetMask(new wxMask(bmpc, *wxLIGHT_GREY));
537 bmpe.SetMask(new wxMask(bmpe, *wxLIGHT_GREY));
538 bmps.SetMask(new wxMask(bmps, *wxLIGHT_GREY));
539 #endif
540
541 // create the buttons and attach tooltips to them
542 wxBitmapButton
543 *bn = new wxBitmapButton(panel, ID_NORTH, bmpn),
544 *bw = new wxBitmapButton(panel, ID_WEST , bmpw),
545 *bc = new wxBitmapButton(panel, ID_CENTER, bmpc),
546 *be = new wxBitmapButton(panel, ID_EAST , bmpe),
547 *bs = new wxBitmapButton(panel, ID_SOUTH, bmps);
548
549 #if wxUSE_TOOLTIPS
550 bn->SetToolTip(_("Find northernmost cell"));
551 bw->SetToolTip(_("Find westernmost cell"));
552 bc->SetToolTip(_("Find center of mass"));
553 be->SetToolTip(_("Find easternmost cell"));
554 bs->SetToolTip(_("Find southernmost cell"));
555 #endif
556
557 // add buttons to sizers
558 sizer2->Add( bw, 0, wxCENTRE | wxWEST, 4 );
559 sizer2->Add( bc, 0, wxCENTRE);
560 sizer2->Add( be, 0, wxCENTRE | wxEAST, 4 );
561 sizer1->Add( bn, 0, wxCENTRE | wxNORTH, 4 );
562 sizer1->Add( sizer2 );
563 sizer1->Add( bs, 0, wxCENTRE | wxSOUTH, 4 );
564
565 // set the miniframe size
566 panel->SetSizer(sizer1);
567 panel->SetAutoLayout(TRUE);
568 sizer1->Fit(this);
569 sizer1->SetSizeHints(this);
570
571 // move it to a sensible position
572 wxRect parentRect = parent->GetRect();
573 wxSize childSize = GetSize();
574 int x = parentRect.GetX() +
575 parentRect.GetWidth();
576 int y = parentRect.GetY() +
577 (parentRect.GetHeight() - childSize.GetHeight()) / 4;
578 Move(x, y);
579
580 // done
581 Show(TRUE);
582 }
583
584 void LifeNavigator::OnClose(wxCloseEvent& event)
585 {
586 if (event.CanVeto())
587 event.Veto();
588 else
589 Destroy();
590 }
591
592
593 // --------------------------------------------------------------------------
594 // LifeCanvas
595 // --------------------------------------------------------------------------
596
597 // canvas constructor
598 LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive)
599 : wxWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100),
600 wxSUNKEN_BORDER)
601 {
602 m_life = life;
603 m_interactive = interactive;
604 m_cellsize = 8;
605 m_status = MOUSE_NOACTION;
606 m_viewportX = 0;
607 m_viewportY = 0;
608 m_viewportH = 0;
609 m_viewportW = 0;
610
611 if (m_interactive)
612 SetCursor(*wxCROSS_CURSOR);
613
614 // reduce flicker if wxEVT_ERASE_BACKGROUND is not available
615 SetBackgroundColour(*wxWHITE);
616 }
617
618 LifeCanvas::~LifeCanvas()
619 {
620 delete m_life;
621 }
622
623 // recenter at the given position
624 void LifeCanvas::Recenter(wxInt32 i, wxInt32 j)
625 {
626 m_viewportX = i - m_viewportW / 2;
627 m_viewportY = j - m_viewportH / 2;
628
629 // redraw everything
630 Refresh(FALSE);
631 }
632
633 // set the cell size and refresh display
634 void LifeCanvas::SetCellSize(int cellsize)
635 {
636 m_cellsize = cellsize;
637
638 // find current center
639 wxInt32 cx = m_viewportX + m_viewportW / 2;
640 wxInt32 cy = m_viewportY + m_viewportH / 2;
641
642 // get current canvas size and adjust viewport accordingly
643 int w, h;
644 GetClientSize(&w, &h);
645 m_viewportW = (w + m_cellsize - 1) / m_cellsize;
646 m_viewportH = (h + m_cellsize - 1) / m_cellsize;
647
648 // recenter
649 m_viewportX = cx - m_viewportW / 2;
650 m_viewportY = cy - m_viewportH / 2;
651
652 // adjust scrollbars
653 if (m_interactive)
654 {
655 SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW);
656 SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH);
657 m_thumbX = m_viewportW;
658 m_thumbY = m_viewportH;
659 }
660
661 Refresh(FALSE);
662 }
663
664 // draw a cell
665 void LifeCanvas::DrawCell(wxInt32 i, wxInt32 j, bool alive)
666 {
667 wxClientDC dc(this);
668
669 dc.SetPen(alive? *wxBLACK_PEN : *wxWHITE_PEN);
670 dc.SetBrush(alive? *wxBLACK_BRUSH : *wxWHITE_BRUSH);
671
672 dc.BeginDrawing();
673 DrawCell(i, j, dc);
674 dc.EndDrawing();
675 }
676
677 void LifeCanvas::DrawCell(wxInt32 i, wxInt32 j, wxDC &dc)
678 {
679 wxCoord x = CellToX(i);
680 wxCoord y = CellToY(j);
681
682 // if cellsize is 1 or 2, there will be no grid
683 switch (m_cellsize)
684 {
685 case 1:
686 dc.DrawPoint(x, y);
687 break;
688 case 2:
689 dc.DrawRectangle(x, y, 2, 2);
690 break;
691 default:
692 dc.DrawRectangle(x + 1, y + 1, m_cellsize - 1, m_cellsize - 1);
693 }
694 }
695
696 // draw all changed cells
697 void LifeCanvas::DrawChanged()
698 {
699 wxClientDC dc(this);
700
701 size_t ncells;
702 Cell *cells;
703 bool done = FALSE;
704
705 m_life->BeginFind(m_viewportX,
706 m_viewportY,
707 m_viewportX + m_viewportW,
708 m_viewportY + m_viewportH,
709 TRUE);
710
711 dc.BeginDrawing();
712
713 if (m_cellsize == 1)
714 {
715 dc.SetPen(*wxBLACK_PEN);
716 }
717 else
718 {
719 dc.SetPen(*wxTRANSPARENT_PEN);
720 dc.SetBrush(*wxBLACK_BRUSH);
721 }
722 dc.SetLogicalFunction(wxINVERT);
723
724 while (!done)
725 {
726 done = m_life->FindMore(&cells, &ncells);
727
728 for (size_t m = 0; m < ncells; m++)
729 DrawCell(cells[m].i, cells[m].j, dc);
730 }
731 dc.EndDrawing();
732 }
733
734 // event handlers
735 void LifeCanvas::OnPaint(wxPaintEvent& event)
736 {
737 wxPaintDC dc(this);
738 wxRect rect = GetUpdateRegion().GetBox();
739 wxCoord x, y, w, h;
740 wxInt32 i0, j0, i1, j1;
741
742 // find damaged area
743 x = rect.GetX();
744 y = rect.GetY();
745 w = rect.GetWidth();
746 h = rect.GetHeight();
747
748 i0 = XToCell(x);
749 j0 = YToCell(y);
750 i1 = XToCell(x + w - 1);
751 j1 = YToCell(y + h - 1);
752
753 size_t ncells;
754 Cell *cells;
755 bool done = FALSE;
756
757 m_life->BeginFind(i0, j0, i1, j1, FALSE);
758 done = m_life->FindMore(&cells, &ncells);
759
760 // erase all damaged cells and draw the grid
761 dc.BeginDrawing();
762 dc.SetBrush(*wxWHITE_BRUSH);
763
764 if (m_cellsize <= 2)
765 {
766 // no grid
767 dc.SetPen(*wxWHITE_PEN);
768 dc.DrawRectangle(x, y, w, h);
769 }
770 else
771 {
772 x = CellToX(i0);
773 y = CellToY(j0);
774 w = CellToX(i1 + 1) - x + 1;
775 h = CellToY(j1 + 1) - y + 1;
776
777 dc.SetPen(*wxLIGHT_GREY_PEN);
778 for (wxInt32 yy = y; yy <= (y + h - m_cellsize); yy += m_cellsize)
779 dc.DrawRectangle(x, yy, w, m_cellsize + 1);
780 for (wxInt32 xx = x; xx <= (x + w - m_cellsize); xx += m_cellsize)
781 dc.DrawLine(xx, y, xx, y + h);
782 }
783
784 // draw all alive cells
785 dc.SetPen(*wxBLACK_PEN);
786 dc.SetBrush(*wxBLACK_BRUSH);
787
788 while (!done)
789 {
790 for (size_t m = 0; m < ncells; m++)
791 DrawCell(cells[m].i, cells[m].j, dc);
792
793 done = m_life->FindMore(&cells, &ncells);
794 }
795
796 // last set
797 for (size_t m = 0; m < ncells; m++)
798 DrawCell(cells[m].i, cells[m].j, dc);
799
800 dc.EndDrawing();
801 }
802
803 void LifeCanvas::OnMouse(wxMouseEvent& event)
804 {
805 if (!m_interactive)
806 return;
807
808 // which cell are we pointing at?
809 wxInt32 i = XToCell( event.GetX() );
810 wxInt32 j = YToCell( event.GetY() );
811
812 // set statusbar text
813 wxString msg;
814 msg.Printf(_("Cell: (%d, %d)"), i, j);
815 ((LifeFrame *) wxGetApp().GetTopWindow())->SetStatusText(msg, 1);
816
817 // button pressed?
818 if (!event.LeftIsDown())
819 {
820 m_status = MOUSE_NOACTION;
821 return;
822 }
823
824 // button just pressed?
825 if (m_status == MOUSE_NOACTION)
826 {
827 // yes, update status and toggle this cell
828 m_status = (m_life->IsAlive(i, j)? MOUSE_ERASING : MOUSE_DRAWING);
829
830 m_mi = i;
831 m_mj = j;
832 m_life->SetCell(i, j, m_status == MOUSE_DRAWING);
833 DrawCell(i, j, m_status == MOUSE_DRAWING);
834 }
835 else if ((m_mi != i) || (m_mj != j))
836 {
837 bool alive = (m_status == MOUSE_DRAWING);
838
839 // prepare DC and pen + brush to optimize drawing
840 wxClientDC dc(this);
841 dc.SetPen(alive? *wxBLACK_PEN : *wxWHITE_PEN);
842 dc.SetBrush(alive? *wxBLACK_BRUSH : *wxWHITE_BRUSH);
843 dc.BeginDrawing();
844
845 // draw a line of cells using Bresenham's algorithm
846 wxInt32 d, ii, jj, di, ai, si, dj, aj, sj;
847 di = i - m_mi;
848 ai = abs(di) << 1;
849 si = (di < 0)? -1 : 1;
850 dj = j - m_mj;
851 aj = abs(dj) << 1;
852 sj = (dj < 0)? -1 : 1;
853
854 ii = m_mi;
855 jj = m_mj;
856
857 if (ai > aj)
858 {
859 // iterate over i
860 d = aj - (ai >> 1);
861
862 while (ii != i)
863 {
864 m_life->SetCell(ii, jj, alive);
865 DrawCell(ii, jj, dc);
866 if (d >= 0)
867 {
868 jj += sj;
869 d -= ai;
870 }
871 ii += si;
872 d += aj;
873 }
874 }
875 else
876 {
877 // iterate over j
878 d = ai - (aj >> 1);
879
880 while (jj != j)
881 {
882 m_life->SetCell(ii, jj, alive);
883 DrawCell(ii, jj, dc);
884 if (d >= 0)
885 {
886 ii += si;
887 d -= aj;
888 }
889 jj += sj;
890 d += ai;
891 }
892 }
893
894 // last cell
895 m_life->SetCell(ii, jj, alive);
896 DrawCell(ii, jj, dc);
897 m_mi = ii;
898 m_mj = jj;
899
900 dc.EndDrawing();
901 }
902
903 ((LifeFrame *) wxGetApp().GetTopWindow())->UpdateInfoText();
904 }
905
906 void LifeCanvas::OnSize(wxSizeEvent& event)
907 {
908 // find center
909 wxInt32 cx = m_viewportX + m_viewportW / 2;
910 wxInt32 cy = m_viewportY + m_viewportH / 2;
911
912 // get new size
913 wxCoord w = event.GetSize().GetX();
914 wxCoord h = event.GetSize().GetY();
915 m_viewportW = (w + m_cellsize - 1) / m_cellsize;
916 m_viewportH = (h + m_cellsize - 1) / m_cellsize;
917
918 // recenter
919 m_viewportX = cx - m_viewportW / 2;
920 m_viewportY = cy - m_viewportH / 2;
921
922 // scrollbars
923 if (m_interactive)
924 {
925 SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW);
926 SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH);
927 m_thumbX = m_viewportW;
928 m_thumbY = m_viewportH;
929 }
930
931 // allow default processing
932 event.Skip();
933 }
934
935 void LifeCanvas::OnScroll(wxScrollWinEvent& event)
936 {
937 WXTYPE type = event.GetEventType();
938 int pos = event.GetPosition();
939 int orient = event.GetOrientation();
940
941 // calculate scroll increment
942 int scrollinc = 0;
943 switch (type)
944 {
945 case wxEVT_SCROLLWIN_TOP:
946 {
947 if (orient == wxHORIZONTAL)
948 scrollinc = -m_viewportW;
949 else
950 scrollinc = -m_viewportH;
951 break;
952 }
953 case wxEVT_SCROLLWIN_BOTTOM:
954 {
955 if (orient == wxHORIZONTAL)
956 scrollinc = m_viewportW;
957 else
958 scrollinc = m_viewportH;
959 break;
960 }
961 case wxEVT_SCROLLWIN_LINEUP: scrollinc = -1; break;
962 case wxEVT_SCROLLWIN_LINEDOWN: scrollinc = +1; break;
963 case wxEVT_SCROLLWIN_PAGEUP: scrollinc = -10; break;
964 case wxEVT_SCROLLWIN_PAGEDOWN: scrollinc = +10; break;
965 case wxEVT_SCROLLWIN_THUMBTRACK:
966 {
967 if (orient == wxHORIZONTAL)
968 {
969 scrollinc = pos - m_thumbX;
970 m_thumbX = pos;
971 }
972 else
973 {
974 scrollinc = pos - m_thumbY;
975 m_thumbY = pos;
976 }
977 break;
978 }
979 case wxEVT_SCROLLWIN_THUMBRELEASE:
980 {
981 m_thumbX = m_viewportW;
982 m_thumbY = m_viewportH;
983 }
984 }
985
986 #if defined(__WXGTK__) || defined(__WXMOTIF__) // what about Motif?
987 // wxGTK updates the thumb automatically (wxMSW doesn't); reset it back
988 if (type != wxEVT_SCROLLWIN_THUMBTRACK)
989 {
990 SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW);
991 SetScrollbar(wxVERTICAL, m_viewportH, m_viewportH, 3 * m_viewportH);
992 }
993 #endif
994
995 if (scrollinc == 0) return;
996
997 // scroll the window and adjust the viewport
998 if (orient == wxHORIZONTAL)
999 {
1000 m_viewportX += scrollinc;
1001 ScrollWindow( -m_cellsize * scrollinc, 0, (const wxRect *) NULL);
1002 }
1003 else
1004 {
1005 m_viewportY += scrollinc;
1006 ScrollWindow( 0, -m_cellsize * scrollinc, (const wxRect *) NULL);
1007 }
1008 }
1009
1010 void LifeCanvas::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
1011 {
1012 // do nothing. I just don't want the background to be erased, you know.
1013 }
1014
1015
wxWidgets (Impactor)