WPF定时器
不知道怎么写,就用渐变边框带着旋转来模拟动态
xaml代码:
<Border BorderThickness="4" Width="60" Height="60" Grid.Row="0" CornerRadius="33,33,33,33" Margin="0,295,0,0" Name="PART_Background"> <Border.BorderBrush> <LinearGradientBrush EndPoint="0.5,1" MappingMode="RelativeToBoundingBox" StartPoint="0.5,0"> <LinearGradientBrush.RelativeTransform> <TransformGroup> <ScaleTransform CenterY="0.5" CenterX="0.5"/> <SkewTransform CenterY="0.5" CenterX="0.5"/> <RotateTransform Angle="90" CenterY="0.5" CenterX="0.5"/> </TransformGroup> </LinearGradientBrush.RelativeTransform> <GradientStop Color="blue" Offset="0.016"/> <GradientStop Color="#FF0000" Offset="0.016"/> </LinearGradientBrush> </Border.BorderBrush> <Border.Background> <LinearGradientBrush EndPoint="0,1" StartPoint="0,0"> <LinearGradientBrush.RelativeTransform> <TransformGroup> <ScaleTransform CenterY="0.5" CenterX="0.5"/> <SkewTransform CenterY="0.5" CenterX="0.5"/> <RotateTransform Angle="20" CenterY="0.5" CenterX="0.5"/> <TranslateTransform/> </TransformGroup> </LinearGradientBrush.RelativeTransform> <GradientStop Color="Transparent" Offset="0"/> <GradientStop Color="Transparent" Offset="0.5"/> <GradientStop Color="Transparent" Offset="0"/> </LinearGradientBrush> </Border.Background> <ContentPresenter Content="{TemplateBinding ContentControl.Content}" HorizontalAlignment="Center" VerticalAlignment="Center" /> </Border>
c#代码:
DispatcherTimer t = new DispatcherTimer(); public void times() { //设置两个GradientStop 第一个是已经变色的,第二个是等待变色的 GradientStop gd = new GradientStop(); gd.Color = Color.FromRgb(255, 0, 0); GradientStop gd2 = new GradientStop(); gd2.Color = Color.FromRgb(0, 0, 255); //设置两个渐变的停止点 gd.Offset = 0.00; gd2.Offset = 0.01; //设置绘制区域 LinearGradientBrush lgb = new LinearGradientBrush(); //设置起始和终止坐标 lgb.StartPoint = new Point(0.5, 0); lgb.EndPoint = new Point(0.5, 1); //旋转 RotateTransform rotate = new RotateTransform(0, 0.5, 0.5); //计时器 t.Tick += new EventHandler((object sender, EventArgs e) => { if (360 - rotate.Angle != 0) { la1.Content = (360 - (int)rotate.Angle) / 6; } else { la1.Content = 0; } //每次加6° rotate.Angle += 6; //旋转区域赋值给它 lgb.RelativeTransform = rotate; //每次加0.016 gd.Offset += 0.01666666; gd2.Offset += 0.01666666; lgb.GradientStops = new GradientStopCollection() { gd, gd2 }; PART_Background.BorderBrush = lgb; //60s end if (rotate.Angle == 360) { la1.Content = 0; t.Stop(); MessageBox.Show("结束"); } }); t.Interval = new TimeSpan(0, 0, 0, 1); t.Start(); }
效果图:
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