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wxWidgets/demos/life/life.cpp
Guillermo Rodriguez Garcia 2480be69b1 Split the sample in three source files + three header files, for improved 
clarity. Now there is a 'life' module (main app), a 'game' module (game
logic) and a 'dialogs' module (guess what).

Also, speeded up drawing a lot.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5309 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-01-08 18:27:19 +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
// ==========================================================================
// --------------------------------------------------------------------------
// headers
// --------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "life.h"
#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 "life.h"
#include "game.h"
#include "dialogs.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
// --------------------------------------------------------------------------
// constants
// --------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items and toolbar buttons
ID_NEWGAME = 1001,
ID_SAMPLES,
ID_ABOUT,
ID_EXIT,
ID_CLEAR,
ID_START,
ID_STEP,
ID_STOP,
ID_WRAP,
// speed selection slider
ID_SLIDER
};
// --------------------------------------------------------------------------
// event tables and other macros for wxWindows
// --------------------------------------------------------------------------
// 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)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(LifeCanvas, wxScrolledWindow)
EVT_PAINT ( LifeCanvas::OnPaint)
EVT_SIZE ( LifeCanvas::OnSize)
EVT_MOUSE_EVENTS ( LifeCanvas::OnMouse)
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 GET_FRAME() \
((LifeFrame *) wxGetApp().GetTopWindow())
// --------------------------------------------------------------------------
// 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);
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"));
menuFile->AppendSeparator();
menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));
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->AppendSeparator();
menuGame->Append(ID_WRAP, _("&Wraparound\tCtrl-W"), _("Wrap around borders"), TRUE);
menuGame->Check (ID_WRAP, TRUE);
wxMenuBar *menuBar = new wxMenuBar();
menuBar->Append(menuFile, _("&File"));
menuBar->Append(menuGame, _("&Game"));
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!"));
// 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,
5, 1, 10,
wxDefaultPosition,
wxSize(200, -1),
wxSL_HORIZONTAL | wxSL_AUTOTICKS);
// 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);
}
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_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 :
{
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::OnNewGame(wxCommandEvent& WXUNUSED(event))
{
int w = m_life->GetWidth();
int h = m_life->GetHeight();
// stop if it was running
OnStop();
// dialog box
LifeNewGameDialog dialog(this, &w, &h);
// new game?
if (dialog.ShowModal() == wxID_OK)
{
// check dimensions
if (w >= LIFE_MIN && w <= LIFE_MAX &&
h >= LIFE_MIN && h <= LIFE_MAX)
{
// resize game field
m_life->Destroy();
m_life->Create(w, h);
// tell the canvas
m_canvas->Reset();
m_canvas->Refresh();
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);
}
}
}
void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event))
{
// stop if it was running
OnStop();
// dialog box
LifeSamplesDialog dialog(this);
// new game?
if (dialog.ShowModal() == wxID_OK)
{
int result = dialog.GetValue();
if (result == -1)
return;
int gw = g_shapes[result].m_fieldWidth;
int gh = g_shapes[result].m_fieldHeight;
int wrap = g_shapes[result].m_wrap;
// set wraparound (don't ask the user)
m_life->SetBorderWrap(wrap);
GetMenuBar()->GetMenu(1)->Check(ID_WRAP, wrap);
// 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 (wxMessageBox(s, _("Question"), wxYES_NO | wxICON_QUESTION, this) == wxYES)
{
m_life->Destroy();
m_life->Create(gw, gh);
}
}
// put the shape
m_life->SetShape(g_shapes[result]);
// tell the canvas about the change
m_canvas->Reset();
m_canvas->Refresh();
m_tics = 0;
UpdateInfoText();
}
}
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;
}
}
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;
}
}
void LifeFrame::OnTimer()
{
if (m_life->NextTic())
m_tics++;
else
OnStop();
UpdateInfoText();
m_canvas->DrawEverything();
m_canvas->Refresh(FALSE);
}
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();
}
// --------------------------------------------------------------------------
// LifeTimer
// --------------------------------------------------------------------------
void LifeTimer::Notify()
{
GET_FRAME()->OnTimer();
};
// --------------------------------------------------------------------------
// LifeCanvas
// --------------------------------------------------------------------------
// canvas constructor
LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive)
: wxScrolledWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100))
{
m_life = life;
m_interactive = interactive;
m_cellsize = 8;
m_bmp = NULL;
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 = 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;
// redraw everything
DrawEverything(TRUE);
SetScrollbars(10, 10, (m_width + 9) / 10, (m_height + 9) / 10);
}
void LifeCanvas::DrawEverything(bool force)
{
wxMemoryDC dc;
dc.SelectObject(*m_bmp);
dc.BeginDrawing();
// draw cells
const CellArray *cells =
force? m_life->GetCells() : m_life->GetChangedCells();
for (unsigned i = 0; i < cells->GetCount(); i++)
DrawCell(cells->Item(i), dc);
// bounding rectangle (always drawn - better than clipping region)
dc.SetPen(*wxBLACK_PEN);
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.DrawRectangle(0, 0, m_width, m_height);
dc.EndDrawing();
dc.SelectObject(wxNullBitmap);
}
void LifeCanvas::DrawCell(Cell c)
{
wxMemoryDC dc;
dc.SelectObject(*m_bmp);
dc.BeginDrawing();
dc.SetClippingRegion(1, 1, m_width - 2, m_height - 2);
DrawCell(c, dc);
dc.EndDrawing();
dc.SelectObject(wxNullBitmap);
}
void LifeCanvas::DrawCell(Cell c, wxDC &dc)
{
if (m_life->IsAlive(c))
{
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);
}
}
// event handlers
void LifeCanvas::OnPaint(wxPaintEvent& event)
{
wxPaintDC dc(this);
wxMemoryDC memdc;
wxRegionIterator upd(GetUpdateRegion());
wxCoord 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)
{
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 );
// 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);
DrawCell( m_life->SetCell(i, j, !alive) );
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();
}
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