WPF实现时钟特效
WPF在样式定义和UI动画上面相对于以前的技术有了不少的提升,下面给出WPF技术实现钟表的效果:
1、Visual Studio新建一个WPF应用程序,命名为WpfClock,新建一个images文件夹,并准备一个钟表的背景图片和程序图标素材。
2、编辑MainWindow.xaml文件,对UI进行定制,代码如下(指针都是用Rectangle实现的,当然可以用图片代替):
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.Navigation; using System.Windows.Shapes; namespace WpfClock { using System.Threading; using System.Windows.Threading; /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { //计时器 System.Timers.Timer timer = new System.Timers.Timer(1000); public MainWindow() { InitializeComponent(); #region 初始化时间 secondPointer.Angle = DateTime.Now.Second * 6; minutePointer.Angle = DateTime.Now.Minute * 6; hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5); this.labTime.Content = DateTime.Now.ToString("HH:mm:ss"); #endregion timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed); timer.Enabled = true; } private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { //进行拖放移动 this.DragMove(); } private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { //UI异步更新 this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => { //秒针转动,秒针绕一圈360度,共60秒,所以1秒转动6度 secondPointer.Angle = DateTime.Now.Second * 6; //分针转动,分针绕一圈360度,共60分,所以1分转动6度 minutePointer.Angle = DateTime.Now.Minute * 6; //时针转动,时针绕一圈360度,共12时,所以1时转动30度。 //另外同一个小时内,随着分钟数的变化(绕一圈60分钟),时针也在缓慢变化(转动30度,30/60=0.5) hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5); //更新时间值 this.labTime.Content = DateTime.Now.ToString("HH:mm:ss"); })); } } }
3、编辑MainWindow.xaml.CS文件,对后台逻辑进行定制,代码如下:
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.Navigation; using System.Windows.Shapes; namespace WpfClock { using System.Threading; using System.Windows.Threading; /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { //计时器 System.Timers.Timer timer = new System.Timers.Timer(1000); public MainWindow() { InitializeComponent(); #region 初始化时间 secondPointer.Angle = DateTime.Now.Second * 6; minutePointer.Angle = DateTime.Now.Minute * 6; hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5); this.labTime.Content = DateTime.Now.ToString("HH:mm:ss"); #endregion timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed); timer.Enabled = true; } private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { //进行拖放移动 this.DragMove(); } private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { //UI异步更新 this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => { //秒针转动,秒针绕一圈360度,共60秒,所以1秒转动6度 secondPointer.Angle = DateTime.Now.Second * 6; //分针转动,分针绕一圈360度,共60分,所以1分转动6度 minutePointer.Angle = DateTime.Now.Minute * 6; //时针转动,时针绕一圈360度,共12时,所以1时转动30度。 //另外同一个小时内,随着分钟数的变化(绕一圈60分钟),时针也在缓慢变化(转动30度,30/60=0.5) hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5); //更新时间值 this.labTime.Content = DateTime.Now.ToString("HH:mm:ss"); })); } } }
4、编译运行,如果运气不错的话,应该能显示如下效果:
总结
WPF可以用RotateTransform中的Angle进行旋转,可以指定中心点(CenterX,CenterY)
<Rectangle.RenderTransform> <RotateTransform x:Name="hourPointer" CenterX="0" CenterY="70" Angle="90" /> </Rectangle.RenderTransform>
以上就是WPF技术实现时钟的效果,小编的水平有限,如果有错误的地方请大家谅解,大家共同进步。
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