//snakegame.h
#ifndef SNAKEGAME_H
#define SNAKEGAME_H
#include<QList>
#include<QtWidgets/QLabel>
#include<QtWidgets/QDialog>
#include<QKeyEvent>
#include<QTimer>
/*枚举，表示方向*/
enum Direction{D_UP,D_DOWN,D_LEFT,D_RIGHT};
class SnakeGame:public QDialog
{
Q_OBJECT
public:
SnakeGame() ;
~SnakeGame();
public slots:
void snakemove();/*移动*/
public:
QLabel* getfood();/*产生新食物*/
void keyPressEvent(QKeyEvent *key);
private:
QList<QLabel*> snake;/*蛇*/
QLabel * food;/*食物*/
Direction dire;/*方向*/
int foodlen;/*食物长度*/
int maxlen;/*最大长度*/
QTimer * timer;/*定时器*/
};
#endif // SNAKEGAME_H
//snakegame.cpp
#include "snakegame.h"
#include<QTime>
#include<QMessageBox>
SnakeGame::SnakeGame(){
this->resize(760,600);
foodlen=40;/*食物的高/宽*/
qsrand(QTime::currentTime().msec());
timer=new QTimer(this);
timer->setInterval(300);
timer->start();
snake.push_back(getfood());
food=getfood();
maxlen=5;
dire=D_RIGHT;
connect(timer,SIGNAL(timeout()),this,SLOT(snakemove()));
}
SnakeGame::~SnakeGame(){
delete timer;
delete food;
for(int i=0;i<snake.length();i++){
delete snake[i];
}
}
void SnakeGame::snakemove(){
int x=snake[0]->x();
int y=snake[0]->y();
bool isover=false;/*自己碰到自己，结束*/
for(int i=1;i<snake.length();i++){
if(snake[0]->x()==snake[i]->x() && snake[0]->y()==snake[i]->y()){
isover=true;
break;
}
}
if(snake.size()>=maxlen){
QMessageBox msg(this);
msg.setText("Continue ?");
msg.setStandardButtons(QMessageBox::Yes|QMessageBox::No);
if(msg.exec()==QMessageBox::No)
{
this->close();
}
else{
maxlen=maxlen*2+1;
}
}
else if(x<0|| y<0 || x>this->width()|| y>this->width()|| isover==true){
QMessageBox msg(this);
msg.setText("Game over!");
msg.exec();
this->close();
}
if(x==food->x()&& y==food->y()){
snake.push_back(food);
food=getfood();
}
/*把后面的移动一步，*/
for(int i=snake.length()-1;i>=1;i--){
snake[i]->move(snake[i-1]->x(),snake[i-1]->y());
}
switch (dire) {
case D_UP:
y=y-foodlen;
break;
case D_DOWN:
y=y+foodlen;
break;
case D_LEFT:
x=x-foodlen;
break;
case D_RIGHT:
x=x+foodlen;
break;
default:
break;
}
/*把头移动一步*/
snake[0]->move(x,y);
}
QLabel* SnakeGame::getfood(){
food=new QLabel(this);
food->resize(foodlen,foodlen);
food->setAutoFillBackground(true);
/*随机颜色*/
//qDebug(QString::number(i).toStdString());
food->setPalette(QPalette(QColor(qrand()%256,qrand()%256,qrand()%256)));
int w=this->width()-foodlen;
int h=this->height()-foodlen;
food->move((qrand()%w)/foodlen*foodlen,
(qrand()%h/foodlen*foodlen));
food->show();
return food;
}
void SnakeGame::keyPressEvent(QKeyEvent *key){
switch (key->key()) {
case Qt::Key_Left:
if(dire!=D_RIGHT) dire=D_LEFT;
break;
case Qt::Key_Right:
if(dire!=D_LEFT) dire=D_RIGHT;
break;
case Qt::Key_Up:
if(dire!=D_DOWN) dire=D_UP;
break;
case Qt::Key_Down:
if(dire!=D_UP) dire=D_DOWN;
break;
default:
break;
}
}
//main.cpp
#include<QApplication>
#include "snakegame.h"
int main(int argc,char* argv[])
{
QApplication app(argc,argv);
SnakeGame sg;
sg.show();
return app.exec();
}
qtday03 简单版的贪吃蛇游戏