RainbowEight 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.Linq;
 5 using System.Runtime.InteropServices.WindowsRuntime;
 6 using System.Threading.Tasks;
 7 using Windows.Foundation;
 8 using Windows.Foundation.Collections;
 9 using Windows.UI.Xaml;
10 using Windows.UI.Xaml.Controls;
11 using Windows.UI.Xaml.Controls.Primitives;
12 using Windows.UI.Xaml.Data;
13 using Windows.UI.Xaml.Input;
14 using Windows.UI.Xaml.Media;
15 using Windows.UI.Xaml.Navigation;
16 
17 // The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
18 
19 namespace RainbowEight
20 {
21     /// <summary>
22     /// An empty page that can be used on its own or navigated to within a Frame.
23     /// </summary>
24     public sealed partial class MainPage : Page
25     {
26         double txtblkBaseSize;
27         Random rand = new Random();
28         public MainPage()
29         {
30             this.InitializeComponent();
31             Loaded += OnPageLoad;
32         }
33 
34         void OnPageLoad(object sender,RoutedEventArgs e)
35         {
36             txtblkBaseSize = txtblk.ActualHeight;
37             CompositionTarget.Rendering += OnCompositionTargetRendering;
38         }
39 
40         void OnCompositionTargetRendering(object sender,object e)
41         {
42             // TimeSpan.FromSeconds(30000)
43             //            Task.Delay(30);
44  //           Sleep(1000);
45 
46 //            txtblk.Text = (rand.Next() % 10).ToString();
47             
48             txtblk.FontSize = ActualHeight / txtblkBaseSize;
49 
50             RenderingEventArgs renderingArgs = e as RenderingEventArgs;
51 
52             double t = (0.25 * renderingArgs.RenderingTime.TotalSeconds) % 1;
53 
54             for (int index=0; index < gradientBrush.GradientStops.Count; index++)
55             {
56                 gradientBrush.GradientStops[index].Offset = index / 7.0 - t;
57             }
58         }
59 
60         static void Sleep(int ms)
61         {
62             new System.Threading.ManualResetEvent(false).WaitOne(ms);
63         }
64 
65         private void OnPage_SizeChanged(object sender, SizeChangedEventArgs e)
66         {
67                         txtblkBaseSize = txtblk.ActualHeight;
68             //            
69             //  txtblk.FontSize = 8;
70             txtblk.FontSize = ActualHeight / txtblkBaseSize;
71         }
72     }
73 }
 1 <Page
 2     x:Class="RainbowEight.MainPage"
 3     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 4     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 5     xmlns:local="using:RainbowEight"
 6     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 7     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 8     mc:Ignorable="d">
 9 
10     <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
11         <TextBlock Name="txtblk"
12                    Text="8"
13                    FontFamily="CooperBlack"
14                    FontSize="1"
15                    HorizontalAlignment="Center"
16                    >
17             <TextBlock.Foreground>
18                 <LinearGradientBrush x:Name="gradientBrush">
19                     <GradientStop Offset="0.00" Color="Red"/>
20                     <GradientStop Offset="0.14" Color="Orange"/>
21                     <GradientStop Offset="0.28" Color="Yellow"/>
22                     <GradientStop Offset="0.43" Color="Green"/>
23                     <GradientStop Offset="0.57" Color="Blue"/>
24                     <GradientStop Offset="0.71" Color="Indigo"/>
25                     <GradientStop Offset="0.86" Color="Violet"/>
26                     <GradientStop Offset="1.00" Color="Red"/>
27                     <GradientStop Offset="1.14" Color="Orange"/>
28                     <GradientStop Offset="1.28" Color="Yellow"/>
29                     <GradientStop Offset="1.43" Color="Green"/>
30                     <GradientStop Offset="1.57" Color="Blue"/>
31                     <GradientStop Offset="1.71" Color="Indigo"/>
32                     <GradientStop Offset="1.86" Color="Violet"/>
33                     <GradientStop Offset="2.00" Color="Red"/>
34                 </LinearGradientBrush>
35             </TextBlock.Foreground>
36         </TextBlock>
37     </Grid>
38 </Page>

 

posted @ 2017-04-25 19:50  韵切  阅读(244)  评论(0)    收藏  举报