F6 Team

今天剛好看到CompositionTarget的一些範例..

用此事件可以做一些簡單的畫面變化效果..

ImageAnimation.xaml

<UserControl x:Class="SilverlightApplication1.ImageAnimation" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="400" Height="300"> <Grid x:Name="LayoutRoot" Background="White"> </Grid> </UserControl>

ImageAnimation.xaml.cs

using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace SilverlightApplication1 { public partial class ImageAnimation : UserControl { private Rectangle rec = new Rectangle(); public ImageAnimation() { InitializeComponent(); Application.Current.Host.Settings.MaxFrameRate = 5;//更新速度(越大越快) CompositionTarget.Rendering += new EventHandler(CompositionTarget_Rendering); rec.Height = LayoutRoot.Height; rec.Width = LayoutRoot.Width; LayoutRoot.Children.Add(rec); } //隨機填入顏色 void CompositionTarget_Rendering(object sender, EventArgs e) { int seed = (int)DateTime.Now.Ticks; Random rnd = new Random(seed); byte a = (byte)rnd.Next(0, 255); byte r = (byte)rnd.Next(0, 255); byte g = (byte)rnd.Next(0, 255); byte b = (byte)rnd.Next(0, 255); rec.Fill = new SolidColorBrush(Color.FromArgb(a, r, g, b)); } } }

執行結果：

Demo：http://demo.dotblogs.com.tw/puma/silverlight/SilverlightApplication1TestPage.html