WPF小程序：贪吃蛇
原文地址：http://hankjin.blog.163.com/blog/static/337319372009535108234/
一共两个文件：EasterEgg.xaml + EasterEgg.xaml.cs
EasterEgg.xaml
<Window
x:Class="Inspect.UI.EasterEgg"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Easter Egg"
Loaded="Window_Loaded" Width="650" Height="450"
KeyDown="Window_KeyDown" SizeChanged="Window_SizeChanged"
WindowStartupLocation="CenterScreen">
<Grid>
<Grid.RowDefinitions>
<RowDefinition
Height="40"/>
<RowDefinition/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0"
Orientation="Horizontal">
<Label
FontSize="20">等级:</Label>
<Label FontSize="20"
Name="lblGrade" Width="50" Content="{Binding
Path=Grade}"></Label>
<Label
FontSize="20">分数:</Label>
<Label FontSize="20"
Name="lblScore" Width="90" Content="{Binding
Path=Score}"></Label>
<Label FontSize="20">说明:
上下左右键调整方向，空格键暂停</Label>
</StackPanel>
<Border Grid.Row="1" BorderThickness="5" BorderBrush="Red"
Name="border">
<Canvas Name="cavas"
Background="#CBE9CE"></Canvas>
</Border>
</Grid>
</Window>
EasterEgg.xaml.cs
using
System;
using System.Collections.Generic;
using System.Linq;
using
System.Text;
using System.Windows;
using System.Windows.Controls;
using
System.Windows.Data;
using System.Windows.Documents;
using
System.Windows.Input;
using System.Windows.Media;
using
System.Windows.Media.Imaging;
using System.Windows.Shapes;
using
System.Timers;
using System.Windows.Threading;
namespace
Inspect.UI
{
/// <summary>
/// Interaction logic for
EasterEgg.xaml
/// </summary>
public partial class EasterEgg
: Window
{
enum Direction { UP, DOWN, LEFT, RIGHT
};
private Brush oldBrush = new SolidColorBrush(Color.FromArgb(100,
0, 255, 0));//brush for snake
private Brush newBrush = new
SolidColorBrush(Color.FromArgb(100, 255, 0, 0));//brush for
destination
private Direction direct;//current
direction
private DispatcherTimer timer = new
DispatcherTimer();
private List<Rectangle> snake = new
List<Rectangle>();
private int snakeTail;
private
Rectangle dest;
private double destTop, destLeft;
private
double W, H;
private int speed;
public static readonly
DependencyProperty GradeProperty = DependencyProperty.Register("Grade",
typeof(int), typeof(EasterEgg));
public static readonly
DependencyProperty ScoreProperty = DependencyProperty.Register("Score",
typeof(int), typeof(EasterEgg));
public int Grade
{
get { return Convert.ToInt32(GetValue(GradeProperty));
}
set { SetValue(GradeProperty, value); }
}
public int Score
{
get { return
Convert.ToInt32(GetValue(ScoreProperty)); }
set {
SetValue(ScoreProperty, value); }
}
public
EasterEgg()
{
InitializeComponent();
this.DataContext = this;//数据绑定
}
private void
Window_Loaded(object sender, RoutedEventArgs e)
{
this.InitSnake();
//start timer
timer.Tick +=
new EventHandler(timer_Elapsed);
timer.Start();
}
/// <summary>
/// 时钟相应
///
</summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private void timer_Elapsed(object sender,
EventArgs e)
{
Walk();
}
private
void Walk()
{
//尾变头
Rectangle tail =
snake[snakeTail];
Rectangle head = snake[(snakeTail + snake.Count
- 1) % snake.Count];
double top =
Convert.ToDouble(head.GetValue(Canvas.TopProperty));
double left
= Convert.ToDouble(head.GetValue(Canvas.LeftProperty));
switch
(direct)
{
case
Direction.LEFT:
left -= 10;
break;
case Direction.RIGHT:
left +=
10;
break;
case
Direction.UP:
top -= 10;
break;
case Direction.DOWN:
top +=
10;
break;
}
//判断是否吃到目标
if (top != destTop || left !=
destLeft)//如果没有吃到目标
{
tail.SetValue(Canvas.TopProperty, top);
tail.SetValue(Canvas.LeftProperty, left);
}
else
{
//snake变长
dest.Fill =
oldBrush;//目标变色，成为snake的一部分
this.snake.Insert(snakeTail,dest);
//分数增加
this.Score = this.Score + 100;
if (this.Score % 2000 ==
0)//过关
{
this.Grade = this.Grade +
1;
this.timer.Interval = new TimeSpan(0, 0, 0, 0, speed -
20 * Grade);
}
//产生新目标
Rand();
}
//判断是否失败
if (top <
0 || left < 0 || top > this.H - 10.0 || left > this.W -
10.0)//如果跑出边界
{
GameOver();
}
else//判断是否咬到自己
{
for (int i =
0; i < snake.Count; i++)
{
if (i ==
snakeTail)
continue;
if
((double)snake[i].GetValue(Canvas.TopProperty) == top &&
(double)snake[i].GetValue(Canvas.LeftProperty) ==
left)
GameOver();
}
}
snakeTail = (snakeTail + 1) %
snake.Count;
}
/// <summary>
///
违反规则，GameOver
/// </summary>
private void
GameOver()
{
this.timer.Stop();
if
(MessageBox.Show("再来一盘?", "游戏结束", MessageBoxButton.YesNo) ==
MessageBoxResult.Yes)
{
this.InitSnake();
this.timer.Start();
}
else
{
this.Close();
}
}
///
<summary>
/// 产生一个随机的目标
///
</summary>
private void Rand()
{
dest
= Rect(newBrush);
this.cavas.Children.Add(dest);
Random rand = new Random(System.DateTime.Now.Millisecond);
destTop = rand.Next(Convert.ToInt32(this.H)/10) * 10.0;
destLeft
= rand.Next(Convert.ToInt32(this.W)/10) * 10.0;
dest.SetValue(Canvas.TopProperty, destTop);
dest.SetValue(Canvas.LeftProperty, destLeft);
}
Rectangle
Rect(Brush brush)
{
Rectangle rect = new
Rectangle();
rect.Height = 10;
rect.Width =
10;
rect.Fill = brush;
return rect;
}
/// <summary>
/// 初始化Snake
///
</summary>
private void InitSnake()
{
this.snake.Clear();
this.cavas.Children.Clear();
//init
destination
Rand();
//init
snake
Rectangle beginer = Rect(oldBrush);//the first part of
snake
this.cavas.Children.Add(beginer);
this.snake.Add(beginer);
beginer.SetValue(Canvas.TopProperty,
0.0);
beginer.SetValue(Canvas.LeftProperty, 0.0);
this.direct = Direction.RIGHT;//initial direction
this.snakeTail
= 0;
this.Score = 0;
this.Grade =
1;
this.speed = 200;
this.timer.Interval = new
TimeSpan(0, 0, 0, 0, speed);
}
///
<summary>
/// 相应上下左右控制键, 空格暂停
///
</summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private void Window_KeyDown(object sender,
KeyEventArgs e)
{
if (e.Key ==
Key.Right)//→
direct = (direct != Direction.LEFT ?
Direction.RIGHT : direct);
else if (e.Key ==
Key.Left)//←
direct = (direct != Direction.RIGHT ?
Direction.LEFT : direct);
else if (e.Key ==
Key.Up)//↑
direct = (direct != Direction.DOWN ? Direction.UP
: direct);
else if (e.Key == Key.Down)//↓
direct = (direct != Direction.UP ? Direction.DOWN : direct);
else
if(e.Key == Key.Space && timer.IsEnabled)//空格键暂停
{
timer.Stop();
return;
}
if(!timer.IsEnabled)//任意键继续
timer.Start();
else
Walk();
}
/// <summary>
/// 窗口的大小改变时，改变两个边界变量W H
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private void Window_SizeChanged(object
sender, SizeChangedEventArgs e)
{
this.W =
Convert.ToInt32(this.cavas.ActualWidth) / 10 * 10.0;
this.H =
Convert.ToInt32(this.cavas.ActualHeight) / 10 * 10.0;
}
}
}
