chore: Add course material
This commit is contained in:
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#include "Light.h"
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||||
#include "Pelican.h"
|
||||
#include "Screen.h"
|
||||
#include <iostream>
|
||||
|
||||
Light::Light(std::string name, int x, int y, int color) : x(x), y(y), c(color), name(name) {}
|
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|
||||
Light::~Light() {
|
||||
std::cout << "Deleting light (" << name << ", " << x << ", " << y << ", " << c << ")"
|
||||
<< "\n";
|
||||
}
|
||||
|
||||
void Light::set(LightState newState) {
|
||||
state = newState;
|
||||
Screen::write(name.c_str(), x, y, state == FLASH ? (128 + c) : (state == OFF ? 0 : c));
|
||||
// 128 + color was used to make a character flash (but not any more)
|
||||
}
|
||||
|
||||
Light::LightState Light::get(void) { return state; }
|
||||
@@ -0,0 +1,30 @@
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||||
// ======================================================
|
||||
//
|
||||
// Represents a light, implemented as a string written
|
||||
// to a console window
|
||||
//
|
||||
// ======================================================
|
||||
|
||||
#ifndef LIGHT_H
|
||||
#define LIGHT_H
|
||||
|
||||
#include <string>
|
||||
|
||||
class Light {
|
||||
public:
|
||||
Light(std::string name, int x, int y, int color);
|
||||
~Light();
|
||||
|
||||
enum LightState { ON, OFF, FLASH };
|
||||
|
||||
void set(LightState new_state);
|
||||
LightState get(void);
|
||||
|
||||
private:
|
||||
int c; // light colour
|
||||
int x, y;
|
||||
std::string name;
|
||||
LightState state;
|
||||
};
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,29 @@
|
||||
|
||||
|
||||
#include "Keyboard.h"
|
||||
#include "Pelican.h"
|
||||
#include "TimerSet.h"
|
||||
|
||||
#include <cctype> // provides toupper()
|
||||
|
||||
int main() {
|
||||
Keyboard kbd;
|
||||
Pelican thePelican(30, 0);
|
||||
|
||||
char c = 0;
|
||||
|
||||
while (std::toupper(c) != 'Q') { // loop until 'Q' is pressed
|
||||
|
||||
while (!kbd.isCharAvail()) {
|
||||
TimerSet::Instance().pollAllTimers(); // no key press to process, poll the timers
|
||||
}
|
||||
|
||||
c = kbd.getChar(); // get the character
|
||||
if (c == ' ') {
|
||||
// it's a space, so press the WAIT button
|
||||
thePelican.press();
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
|
||||
|
||||
#include "Pelican.h"
|
||||
#include "PelicanTimer.h"
|
||||
#include "Pole.h"
|
||||
|
||||
Pelican::Pelican(int x, int y)
|
||||
: pressed(false), RED_TIME(4), YELLOW_TIME(2), GREEN_TIME(3), FLASH_TIME(5), myPole(new Pole(x, y)),
|
||||
state(GREEN_IDLE) {
|
||||
myTimer = new PelicanTimer(*this, &Pelican::timerExpired);
|
||||
|
||||
myPole->setTrafficLights(getState());
|
||||
myPole->setWaitLight(isPressed());
|
||||
}
|
||||
|
||||
Pelican::~Pelican() { delete myPole; }
|
||||
|
||||
void Pelican::press(void) {
|
||||
if (state == GREEN_IDLE) {
|
||||
state = YELLOW_STATE;
|
||||
myTimer->timeoutRequest(YELLOW_TIME);
|
||||
pressed = true;
|
||||
myPole->setTrafficLights(getState());
|
||||
myPole->setWaitLight(isPressed());
|
||||
} else if (state != RED_STATE) {
|
||||
pressed = true;
|
||||
myPole->setTrafficLights(getState());
|
||||
myPole->setWaitLight(isPressed());
|
||||
}
|
||||
}
|
||||
|
||||
void Pelican::timerExpired(void) {
|
||||
switch (state) {
|
||||
case RED_STATE:
|
||||
state = YELLOW_FLASHING;
|
||||
myTimer->timeoutRequest(FLASH_TIME);
|
||||
break;
|
||||
|
||||
case YELLOW_FLASHING:
|
||||
state = GREEN_TIMING;
|
||||
myTimer->timeoutRequest(GREEN_TIME);
|
||||
break;
|
||||
|
||||
case GREEN_TIMING:
|
||||
if (pressed) {
|
||||
state = YELLOW_STATE;
|
||||
myTimer->timeoutRequest(YELLOW_TIME);
|
||||
} else {
|
||||
state = GREEN_IDLE;
|
||||
}
|
||||
break;
|
||||
|
||||
case GREEN_IDLE:
|
||||
// should never happen
|
||||
break;
|
||||
|
||||
case YELLOW_STATE:
|
||||
state = RED_STATE;
|
||||
pressed = false;
|
||||
myTimer->timeoutRequest(RED_TIME);
|
||||
break;
|
||||
}
|
||||
|
||||
myPole->setTrafficLights(getState());
|
||||
myPole->setWaitLight(isPressed());
|
||||
}
|
||||
@@ -0,0 +1,53 @@
|
||||
// ======================================================
|
||||
//
|
||||
// Represents a Pelican crossing
|
||||
//
|
||||
// ======================================================
|
||||
|
||||
#ifndef PELICAN_H
|
||||
#define PELICAN_H
|
||||
|
||||
class PelicanTimer;
|
||||
class Pole;
|
||||
|
||||
class Pelican {
|
||||
public:
|
||||
Pelican(int x, int y);
|
||||
~Pelican();
|
||||
|
||||
// call when the WAIT button has been pressed
|
||||
void press(void);
|
||||
|
||||
// states that a Pelican can be in
|
||||
enum PelicanState { RED_STATE, YELLOW_FLASHING, GREEN_TIMING, GREEN_IDLE, YELLOW_STATE };
|
||||
|
||||
bool isPressed() const { return pressed; }
|
||||
PelicanState getState() const { return state; }
|
||||
|
||||
private:
|
||||
// state that this Pelican is in
|
||||
PelicanState state;
|
||||
|
||||
// called by PeleicanTimer when the lights need to change
|
||||
void timerExpired(void);
|
||||
|
||||
const unsigned int RED_TIME;
|
||||
const unsigned int YELLOW_TIME;
|
||||
const unsigned int GREEN_TIME;
|
||||
const unsigned int FLASH_TIME;
|
||||
|
||||
// indicates whether the WAIT light should be on
|
||||
bool pressed;
|
||||
|
||||
Pole *myPole;
|
||||
|
||||
// Timer that indicates when the lights should change
|
||||
PelicanTimer *myTimer;
|
||||
|
||||
private:
|
||||
// prevent general use of copy ctor and operator=
|
||||
Pelican(const Pelican &);
|
||||
Pelican &operator=(const Pelican &);
|
||||
};
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,10 @@
|
||||
|
||||
#include "PelicanTimer.h"
|
||||
|
||||
PelicanTimer::PelicanTimer(Pelican &target, TargetFunc targetFunc) : myTarget(target), myTargetFunc(targetFunc) {}
|
||||
|
||||
void PelicanTimer::tick() {
|
||||
if (isExpired()) {
|
||||
(myTarget.*myTargetFunc)();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,31 @@
|
||||
// ======================================================
|
||||
//
|
||||
// This class specializes the Timer to enable it to
|
||||
// stimulate a Pelican
|
||||
//
|
||||
// ======================================================
|
||||
|
||||
#ifndef PELICANTIMER_H
|
||||
#define PELICANTIMER_H
|
||||
|
||||
#include "Pelican.h"
|
||||
#include "Timer.h"
|
||||
|
||||
class PelicanTimer : public Timer {
|
||||
public:
|
||||
typedef void (Pelican::*TargetFunc)();
|
||||
|
||||
PelicanTimer(Pelican &target, TargetFunc targetFunc);
|
||||
|
||||
// TODO: Remove this function
|
||||
virtual void tick();
|
||||
|
||||
// TODO: Add override of virtual function Timer::doExpired
|
||||
// (this is the "primitive step" of the template method pattern)
|
||||
|
||||
private:
|
||||
Pelican &myTarget;
|
||||
TargetFunc myTargetFunc;
|
||||
};
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,59 @@
|
||||
#include "Pole.h"
|
||||
#include "Screen.h"
|
||||
|
||||
Pole::Pole(int x, int y) : waitLight(new Light("WAIT", x + 6, y + 12, Screen::WHITE)) {
|
||||
using namespace Screen; // we will discuss namespaces in the course
|
||||
|
||||
lights[RED_LIGHT] = new Light("*", x + 11, y + 3, RED);
|
||||
lights[RED_MAN] = new Light("*<-=", x + 6, y + 4, RED);
|
||||
lights[YELLOW_LIGHT] = new Light("*", x + 11, y + 5, YELLOW);
|
||||
lights[GREEN_LIGHT] = new Light("*", x + 11, y + 7, GREEN);
|
||||
lights[GREEN_MAN] = new Light("*|-<", x + 6, y + 7, GREEN);
|
||||
|
||||
write(" _____ ", x, ++y, GRAY);
|
||||
write(" /___ /| ", x, ++y, GRAY);
|
||||
write(" | | | ", x, ++y, GRAY);
|
||||
write(" | |/| ", x, ++y, GRAY);
|
||||
write(" |____| | ", x, ++y, GRAY);
|
||||
write(" | |/| ", x, ++y, GRAY);
|
||||
write(" | | | ", x, ++y, GRAY);
|
||||
write(" |____|/ ", x, ++y, GRAY);
|
||||
write(" _||__ ", x, ++y, GRAY);
|
||||
write(" /___ /| ", x, ++y, GRAY);
|
||||
write(" | | | ", x, ++y, GRAY);
|
||||
write(" | | | ", x, ++y, GRAY);
|
||||
write(" |____|/ ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write(" || ", x, ++y, GRAY);
|
||||
write("========||===========", x, ++y, GRAY);
|
||||
write(" / || / ", x, ++y, GRAY);
|
||||
write("_ /_________ /_ ", x, ++y, GRAY);
|
||||
write("/ / ", x, ++y, GRAY);
|
||||
}
|
||||
|
||||
Pole::~Pole() {
|
||||
for (int i = 0; i < sizeof lights / sizeof(lights[0]); ++i)
|
||||
delete lights[i];
|
||||
delete waitLight;
|
||||
}
|
||||
|
||||
void Pole::setTrafficLights(Pelican::PelicanState state) {
|
||||
static const Light::LightState LightStates[Pelican::YELLOW_STATE + 1][RED_MAN + 1] = {
|
||||
// red yellow green green man red man
|
||||
{Light::ON, Light::OFF, Light::OFF, Light::ON, Light::OFF}, // red
|
||||
{Light::OFF, Light::FLASH, Light::OFF, Light::FLASH, Light::OFF}, // y flash
|
||||
{Light::OFF, Light::OFF, Light::ON, Light::OFF, Light::ON}, // g time
|
||||
{Light::OFF, Light::OFF, Light::ON, Light::OFF, Light::ON}, // g idle
|
||||
{Light::OFF, Light::ON, Light::OFF, Light::OFF, Light::ON} // yellow
|
||||
};
|
||||
|
||||
for (int i = RED_LIGHT; i <= RED_MAN; i++) {
|
||||
lights[i]->set(LightStates[state][i]);
|
||||
}
|
||||
}
|
||||
|
||||
void Pole::setWaitLight(bool pressed) { waitLight->set(pressed ? Light::ON : Light::OFF); }
|
||||
@@ -0,0 +1,25 @@
|
||||
|
||||
|
||||
#ifndef POLE_H
|
||||
#define POLE_H
|
||||
|
||||
#include "Light.h"
|
||||
#include "Pelican.h"
|
||||
|
||||
class Pole {
|
||||
public:
|
||||
Pole(int x, int y);
|
||||
~Pole();
|
||||
|
||||
void setTrafficLights(Pelican::PelicanState state);
|
||||
void setWaitLight(bool pressed);
|
||||
|
||||
private:
|
||||
enum LightName { RED_LIGHT, YELLOW_LIGHT, GREEN_LIGHT, GREEN_MAN, RED_MAN };
|
||||
|
||||
Light *lights[RED_MAN + 1];
|
||||
|
||||
Light *waitLight;
|
||||
};
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,17 @@
|
||||
|
||||
|
||||
#include "Timer.h"
|
||||
#include "TimerSet.h"
|
||||
|
||||
void Timer::timeoutRequest(int seconds) { timeToGo = seconds; }
|
||||
|
||||
Timer::Timer() : timeToGo(-1) { TimerSet::Instance().addATimer(this); }
|
||||
|
||||
bool Timer::isExpired() {
|
||||
if (timeToGo > 0) {
|
||||
if (--timeToGo == 0) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
@@ -0,0 +1,27 @@
|
||||
// ======================================================
|
||||
//
|
||||
// A general-purpose countdown timer
|
||||
// To use this class, specialize it
|
||||
// and override tick()
|
||||
//
|
||||
// ======================================================
|
||||
|
||||
#ifndef timer_H
|
||||
#define timer_H
|
||||
|
||||
class Timer {
|
||||
public:
|
||||
Timer();
|
||||
|
||||
void timeoutRequest(int seconds);
|
||||
|
||||
virtual void tick() = 0;
|
||||
|
||||
protected:
|
||||
bool isExpired();
|
||||
|
||||
private:
|
||||
int timeToGo;
|
||||
};
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,23 @@
|
||||
#include "TimerSet.h"
|
||||
#include "Timer.h"
|
||||
#include <iostream>
|
||||
|
||||
TimerSet::TimerSet() : timersInUse(0), previousTime(time(NULL)) {}
|
||||
|
||||
void TimerSet::addATimer(Timer *t) { timers[timersInUse++] = t; }
|
||||
|
||||
void TimerSet::pollAllTimers() {
|
||||
std::time_t timeNow;
|
||||
if (time(&timeNow) > previousTime) {
|
||||
previousTime = timeNow;
|
||||
for (int i = 0; i < timersInUse; ++i) {
|
||||
timers[i]->tick();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
TimerSet &TimerSet::Instance() {
|
||||
// Meyer's Singleton implementation
|
||||
static TimerSet pInstance;
|
||||
return pInstance;
|
||||
}
|
||||
@@ -0,0 +1,29 @@
|
||||
#ifndef TIMERSET_H
|
||||
#define TIMERSET_H
|
||||
|
||||
#include <ctime>
|
||||
|
||||
class Timer;
|
||||
|
||||
class TimerSet {
|
||||
public:
|
||||
void pollAllTimers();
|
||||
void addATimer(Timer *);
|
||||
|
||||
private:
|
||||
TimerSet();
|
||||
Timer *timers[40];
|
||||
int timersInUse;
|
||||
std::time_t previousTime;
|
||||
|
||||
// Meyer's singleton
|
||||
public:
|
||||
static TimerSet &Instance();
|
||||
|
||||
private:
|
||||
// prevent copying and assignment of the singleton
|
||||
TimerSet(const TimerSet &);
|
||||
TimerSet &operator=(const TimerSet &);
|
||||
};
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user