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):
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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" );
}));
}
}
}
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3、编辑mainwindow.xaml.cs文件,对后台逻辑进行定制,代码如下:
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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" );
}));
}
}
}
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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)
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<rectangle.rendertransform>
<rotatetransform x:name= "hourpointer" centerx= "0" centery= "70" angle= "90" />
</rectangle.rendertransform>
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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。