using System; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Input; 
using System.Windows.Media; 
using System.Windows.Shapes; 
using System.Windows.Threading; 

namespace Escapa 
{ 
public partial class Page : UserControl 
{ 
private Rectangle blackRect = new Rectangle(); 
private Rectangle whiteRect = new Rectangle(); 
private Rectangle blueRect1 = new Rectangle(); 
private Rectangle blueRect2 = new Rectangle(); 
private Rectangle blueRect3 = new Rectangle(); 
private Rectangle blueRect4 = new Rectangle(); 
private Rectangle redRect = new Rectangle(); 
private TextBlock readme = new TextBlock(); 

private DispatcherTimer timer = new DispatcherTimer(); 
private DateTime startTime; 

private void defaultValue() 
{ 
this.blackRect.Height = 452; this.blackRect.Width = 452; 
this.blackRect.SetValue(Canvas.LeftProperty, 0.0); 
this.blackRect.SetValue(Canvas.TopProperty, 0.0); 
this.blackRect.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0, 0, 0)); 

this.whiteRect.Height = 349; this.whiteRect.Width = 349; 
this.whiteRect.SetValue(Canvas.LeftProperty, 46.0); 
this.whiteRect.SetValue(Canvas.TopProperty, 46.0); 
this.whiteRect.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF)); 
this.whiteRect.HorizontalAlignment = HorizontalAlignment.Center; 
this.VerticalAlignment = VerticalAlignment.Center; 

this.blueRect1.Height = 62; 
this.blueRect1.Width = 62; 
this.blueRect1.SetValue(Canvas.LeftProperty, 68.0); 
this.blueRect1.SetValue(Canvas.TopProperty, 66.0); 
this.blueRect1.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0x0F, 0x6F, 0xFF)); 

this.blueRect2.Height = 52; 
this.blueRect2.Width = 62; 
this.blueRect2.SetValue(Canvas.LeftProperty, 268.0); 
this.blueRect2.SetValue(Canvas.TopProperty, 56.0); 
this.blueRect2.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0x0F, 0x6F, 0xFF)); 

this.blueRect3.Height = 62; 
this.blueRect3.Width = 32; 
this.blueRect3.SetValue(Canvas.LeftProperty, 68.0); 
this.blueRect3.SetValue(Canvas.TopProperty, 316.0); 
this.blueRect3.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0x0F, 0x6F, 0xFF)); 

this.blueRect4.Height = 22; 
this.blueRect4.Width = 98; 
this.blueRect4.SetValue(Canvas.LeftProperty, 298.0); 
this.blueRect4.SetValue(Canvas.TopProperty, 326.0); 
this.blueRect4.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0x0F, 0x6F, 0xFF)); 

this.blueRect4.Height = 22; 
this.blueRect4.Width = 98; 
this.blueRect4.SetValue(Canvas.LeftProperty, 298.0); 
this.blueRect4.SetValue(Canvas.TopProperty, 326.0); 
this.blueRect4.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0x0F, 0x6F, 0xFF)); 

this.redRect.Height = 41; 
this.redRect.Width = 41; 
this.redRect.SetValue(Canvas.LeftProperty, 204.0); 
this.redRect.SetValue(Canvas.TopProperty, 202.0); 
this.redRect.Fill = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0, 0)); 

this.xs = 3.0; //默認(rèn)橫移動(dòng)速度 
this.ys = 2.0; //默認(rèn)豎移動(dòng)速度 
} 

/// <summary>一橫一豎線是否相交</summary> 
/// <param name="hx1">橫線左</param> 
/// <param name="hx2">橫線右</param> 
/// <param name="hy">橫線y</param> 
/// <param name="vy1">豎線高</param> 
/// <param name="vy2">豎線低</param> 
/// <param name="vx">豎線x</param> 
/// <returns></returns> 
private bool IsLineCross(double hx1, double hx2, double hy, double vy1, double vy2, double vx) 
{ 
return (vy1 < hy) && (vy2 > hy) && (hx1 < vx) && (hx2 > vx); 
} 
private bool IsRectCross(Rectangle r1, Rectangle r2) 
{ 
double x11 = (double)r1.GetValue(Canvas.LeftProperty); 
double y11 = (double)r1.GetValue(Canvas.TopProperty); 
double x12 = x11 + r1.Width; 
double y12 = y11 + r1.Height; 

double x21 = (double)r2.GetValue(Canvas.LeftProperty); 
double y21 = (double)r2.GetValue(Canvas.TopProperty); 
double x22 = x21 + r2.Width; 
double y22 = y21 + r2.Height; 

return 
IsLineCross(x11, x12, y11, y21, y22, x21) //橫上 豎左 
|| IsLineCross(x11, x12, y11, y21, y22, x22) //橫上 豎右 
|| IsLineCross(x11, x12, y12, y21, y22, x21) //橫下 豎左 
|| IsLineCross(x11, x12, y12, y21, y22, x22) //橫下 豎右 

|| IsLineCross(x21, x22, y21, y11, y12, x11) //橫上 豎左 
|| IsLineCross(x21, x22, y21, y11, y12, x12) //橫上 豎右 
|| IsLineCross(x21, x22, y22, y11, y12, x11) //橫下 豎左 
|| IsLineCross(x21, x22, y22, y11, y12, x12) //橫下 豎右 
; 
} 

public Page() 
{ 
InitializeComponent(); 

Canvas canvas = new Canvas(); 
this.LayoutRoot.Children.Add(canvas); 
canvas.Children.Add(this.blackRect); 
canvas.Children.Add(this.whiteRect); 
canvas.Children.Add(this.blueRect1); 
canvas.Children.Add(this.blueRect2); 
canvas.Children.Add(this.blueRect3); 
canvas.Children.Add(this.blueRect4); 
canvas.Children.Add(this.redRect); 

canvas.Children.Add(readme); 
readme.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 100, 180)); 
readme.FontSize = 20; 
readme.Text = "在白色范圍內(nèi)移動(dòng)紅色方塊，避免碰到藍(lán)色方塊"; 

this.defaultValue(); 

this.timer.Interval = new TimeSpan(0, 0, 0, 0, 1); 
this.timer.Tick += new EventHandler(timer_Tick); 

this.redRect.MouseLeftButtonDown += new MouseButtonEventHandler(redRect_MouseLeftButtonDown); 
this.redRect.MouseMove += new MouseEventHandler(redRect_MouseMove); 
this.redRect.MouseLeftButtonUp += new MouseButtonEventHandler(redRect_MouseLeftButtonUp); 
} 

private void CheckFinish() 
{ 
//判斷出白界 
double redx = (double)this.redRect.GetValue(Canvas.LeftProperty); 
double redy = (double)this.redRect.GetValue(Canvas.TopProperty); 
double whitex = (double)this.whiteRect.GetValue(Canvas.LeftProperty); 
double whitey = (double)this.whiteRect.GetValue(Canvas.TopProperty); 
//判斷紅藍(lán)碰撞 
if (redx < whitex || redx + this.redRect.Width > whitex + this.whiteRect.Width) this.Finish(); 
if (redy < whitey || redy + this.redRect.Height > whitey + this.whiteRect.Height) this.Finish(); 
if ( 
IsRectCross(this.redRect, this.blueRect1) || 
IsRectCross(this.redRect, this.blueRect2) || 
IsRectCross(this.redRect, this.blueRect3) || 
IsRectCross(this.redRect, this.blueRect4) 
) 
{ 
this.Finish(); 
} 
} 
private void Finish() 
{ 
this.isMouseDown = false; 
this.redRect.ReleaseMouseCapture(); 
MessageBox.Show(string.Format("{0}秒", (DateTime.Now - this.startTime).TotalSeconds)); 
this.timer.Stop(); 
this.readme.Visibility = Visibility.Visible; 
this.defaultValue(); 
} 

//4個(gè)藍(lán)色方塊的移動(dòng)方向 
private int fx1 = 1; private int fy1 = 1; 
private int fx2 = -1; private int fy2 = 1; 
private int fx3 = 1; private int fy3 = -1; 
private int fx4 = -1; private int fy4 = -1; 
private double xs; 
private double ys; 
void timer_Tick(object sender, EventArgs e) 
{ 
double v1x = (double)this.blueRect1.GetValue(Canvas.LeftProperty); 
double v1y = (double)this.blueRect1.GetValue(Canvas.TopProperty); 
double v2x = (double)this.blueRect2.GetValue(Canvas.LeftProperty); 
double v2y = (double)this.blueRect2.GetValue(Canvas.TopProperty); 
double v3x = (double)this.blueRect3.GetValue(Canvas.LeftProperty); 
double v3y = (double)this.blueRect3.GetValue(Canvas.TopProperty); 
double v4x = (double)this.blueRect4.GetValue(Canvas.LeftProperty); 
double v4y = (double)this.blueRect4.GetValue(Canvas.TopProperty); 

v1x += xs * fx1; v1y += ys * fy1; 
v2x += xs * fx2; v2y += ys * fy2; 
v3x += xs * fx3; v3y += ys * fy3; 
v4x += xs * fx4; v4y += ys * fy4; 

if (v1x < 0 || v1x > this.blackRect.Width - this.blueRect1.Width) fx1 *= -1; 
if (v1y < 0 || v1y > this.blackRect.Height - this.blueRect1.Height) fy1 *= -1; 
if (v2x < 0 || v2x > this.blackRect.Width - this.blueRect2.Width) fx2 *= -1; 
if (v2y < 0 || v2y > this.blackRect.Height - this.blueRect2.Height) fy2 *= -1; 
if (v3x < 0 || v3x > this.blackRect.Width - this.blueRect3.Width) fx3 *= -1; 
if (v3y < 0 || v3y > this.blackRect.Height - this.blueRect3.Height) fy3 *= -1; 
if (v4x < 0 || v4x > this.blackRect.Width - this.blueRect4.Width) fx4 *= -1; 
if (v4y < 0 || v4y > this.blackRect.Height - this.blueRect4.Height) fy4 *= -1; 

this.blueRect1.SetValue(Canvas.LeftProperty, v1x); 
this.blueRect1.SetValue(Canvas.TopProperty, v1y); 
this.blueRect2.SetValue(Canvas.LeftProperty, v2x); 
this.blueRect2.SetValue(Canvas.TopProperty, v2y); 
this.blueRect3.SetValue(Canvas.LeftProperty, v3x); 
this.blueRect3.SetValue(Canvas.TopProperty, v3y); 
this.blueRect4.SetValue(Canvas.LeftProperty, v4x); 
this.blueRect4.SetValue(Canvas.TopProperty, v4y); 

//每次速度提升1/1000 
this.xs *= 1.001; 
this.ys *= 1.001; 

this.CheckFinish(); 
} 

private double beginX; 
private double beginY; 
private bool isMouseDown; 
void redRect_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) 
{ 
this.beginX = e.GetPosition(null).X; 
this.beginY = e.GetPosition(null).Y; 
this.isMouseDown = true; 
((UIElement)sender).CaptureMouse(); 
if (this.timer.IsEnabled == false) 
{ 
this.timer.Start(); //開始移動(dòng) 
this.readme.Visibility = Visibility.Collapsed; 
this.startTime = DateTime.Now; 
} 
} 
void redRect_MouseMove(object sender, MouseEventArgs e) 
{ 
if (isMouseDown == true) 
{ 
double currX = e.GetPosition(null).X; 
double currY = e.GetPosition(null).Y; 
double currLeft = (double)((UIElement)sender).GetValue(Canvas.LeftProperty); 
double currTop = (double)((UIElement)sender).GetValue(Canvas.TopProperty); 
((UIElement)sender).SetValue(Canvas.LeftProperty, currLeft + currX - beginX); 
((UIElement)sender).SetValue(Canvas.TopProperty, currTop + currY - beginY); 
this.beginX = currX; 
this.beginY = currY; 
} 
} 
void redRect_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) 
{ 
this.isMouseDown = false; 
((UIElement)sender).ReleaseMouseCapture(); 
} 

}