简单的实现了走和变大的样子，剩下的还在完善
贴代码
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QPainter>
#include <QRect>
#include <QMessageBox>
#include <QString>
#include <QDebug>
#define UP 0
#define DOWN 1
#define LEFT 2
#define RIGHT 3
static int rect_width = 10;
static int COL = 0;
static int ROW = 0;
MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow),m_foodCount(0),m_currentGrade(0),m_currentSpeed(500)
{
ui->setupUi(this);
this->setWindowTitle("Snake"); //set window title "Snake"
ui->widget->installEventFilter(this); //install eventfilter
COL =ui->widget->width()/rect_width;
ROW =ui->widget->height()/rect_width;
init();
}
MainWindow::~MainWindow()
{
timer->stop();
delete ui;
}
bool MainWindow::eventFilter(QObject *watched, QEvent *event) //eventfilter
{
if(watched == ui->widget && event->type() == QEvent::Paint )
{
painter_rects();
// return true;
}
else
{
return 0;
}
return QWidget::eventFilter(watched,event);
}
void MainWindow::creatFood()
{
foodPosition[0] = qrand()%COL;
foodPosition[1] = qrand()%ROW;
for(int bodyId=0;bodyId<m_foodCount;bodyId++)
{
if(foodPosition[0] == snake[bodyId][0]&&foodPosition[1] == snake[bodyId][1])
{
foodPosition[0] = qrand()%COL-1;
foodPosition[1] = qrand()%ROW-1;
}
}
}
void MainWindow::drawSnakeHead()
{
snake[0][0] = qrand()%COL;
snake[0][1] = qrand()%ROW;
m_direction = qrand()%4;
}
void MainWindow::init()
{
timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(slot_Timerout()));
timer->start(m_currentSpeed);
creatFood();
drawSnakeHead();
}
bool MainWindow::dealGuoJie()
{
if(snake[0][0]>(COL-1)|| snake[0][0]<0 || snake[0][1]>(ROW-1)|| snake[0][1]<0)
{
gameOver();
return true;
}
for(int i =1;i<m_foodCount;++i)
{
if(snake[0][0] == snake[i][0] && snake[0][1] == snake[i][1])
{
gameOver();
return true;
}
}
return false;
}
void MainWindow::gameOver()
{
QMessageBox::information(this,QString("敬告"),QString("游戏结束"));
}
void MainWindow::flashgrade()
{
ui->label_grade->setText(QString::number(m_currentGrade,10));
}
void MainWindow::snakeRun()
{
if(dealGuoJie())
{
return;
}
checkEatFood();
update();
}
void MainWindow::snakeHeadRun()
{
switch (m_direction) {
case UP:
--snake[0][1];
break;
case DOWN:
++snake[0][1];
break;
case LEFT:
--snake[0][0];
break;
case RIGHT:
++snake[0][0];
break;
default:
break;
}
}
void MainWindow::checkEatFood()
{
if(snake[0][0] == foodPosition[0] && snake[0][1] == foodPosition[1])
{
++m_foodCount;
ungrade();
flashgrade();
creatFood();
}
for(int snId = m_foodCount;snId>0;--snId)
{
snake[snId][0] = snake[snId-1][0];
snake[snId][1] = snake[snId-1][1];
}
snakeHeadRun();
}
void MainWindow::ungrade()
{
}
void MainWindow::painter_rects()
{
QPainter painer(ui->widget);
/*
* draw the rects
*/
for(int x=0;x<COL;x++)
{
for(int y=0;y<ROW;y++)
{
painer.drawRect(QRect(x*rect_width,y*rect_width,rect_width,rect_width));
}
}
/*
* draw food
*/
painer.fillRect(QRect(foodPosition[0]*rect_width,foodPosition[1]*rect_width,rect_width,rect_width),Qt::green);
/*
* draw snake head
*/
painer.fillRect(QRect(snake[0][0]*rect_width,snake[0][1]*rect_width,rect_width,rect_width),Qt::red);
/*
* draw snake body
*/
for(int snakebody=1;snakebody<m_foodCount;snakebody++)
{
painer.fillRect(QRect(snake[snakebody][0]*rect_width,snake[snakebody][1]*rect_width,rect_width,rect_width),Qt::black);
}
}
void MainWindow::on_pushButton_up_clicked()
{
m_direction = UP;
qDebug()<<"up active";
}
void MainWindow::on_pushButton_left_clicked()
{
m_direction = LEFT;
qDebug()<<"left active";
}
void MainWindow::on_pushButton_right_clicked()
{
m_direction = RIGHT;
qDebug()<<"right active";
}
void MainWindow::on_pushButton_down_clicked()
{
m_direction = DOWN;
qDebug()<<"down active";
}
void MainWindow::slot_Timerout()
{
snakeRun();
qDebug()<<"timrt is Run";
}