XAML
<UserControl x:
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:RpowerMonitor_MCS.UserControls"
mc:Ignorable="d"
d:DesignHeight="200" d:DesignWidth="300"
Loaded="ProgressBarControl_OnLoaded">
<Grid>
<Grid.Resources>
<Style TargetType="Ellipse">
<Setter Property="Height" Value="https://www.cnblogs.com/wangyonglai/p/{Binding EclipseSize}"></Setter>
<Setter Property="Width" Value="https://www.cnblogs.com/wangyonglai/p/{Binding EclipseSize}"></Setter>
<Setter Property="Stretch" Value="https://www.cnblogs.com/wangyonglai/p/Fill"></Setter>
<!--設定圓的顏色-->
<Setter Property="Fill" Value="https://www.cnblogs.com/wangyonglai/p/Gray"></Setter>
</Style>
</Grid.Resources>
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<Viewbox Width="{Binding ViewBoxSize}" Height="{Binding ViewBoxSize}" HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid x:Name="LayoutRoot" Background="Transparent" HorizontalAlignment="Center" VerticalAlignment="Center">
<!--此處有canvas的加載和卸載事件-->
<Canvas x:Name="ProgressBarCanvas" RenderTransformOrigin="0.5,0.5" HorizontalAlignment="Center" VerticalAlignment="Center"
Width="{Binding CanvasSize}" Height="{Binding CanvasSize}" Loaded="HandleLoaded" Unloaded="HandleUnloaded" >
<!--畫圓-->
<Canvas.RenderTransform>
<RotateTransform x:Name="SpinnerRotate" Angle="0" />
</Canvas.RenderTransform>
</Canvas>
</Grid>
</Viewbox>
</StackPanel>
</Grid>
</UserControl>
后臺代碼
/// <summary>
/// ProgressBarControl.xaml 的互動邏輯
/// </summary>
public partial class ProgressBarControl : UserControl
{
private DispatcherTimer animationTimer;
private ProgressBarDataModel _dataModel;
public ProgressBarControl()
{
InitializeComponent();
}
private void ProgressBarControl_OnLoaded(object sender, RoutedEventArgs e)
{
animationTimer = new DispatcherTimer(DispatcherPriority.ContextIdle, Dispatcher);
//指定時間間隔
animationTimer.Interval = new TimeSpan(0, 0, 0, 0, TimeSpan);
if (EllipseCount < 1)
{
EllipseCount = 12;
}
for (int i = 0; i < EllipseCount; i++)
{
ProgressBarCanvas.Children.Add(new Ellipse());
}
var dataModel = new ProgressBarDataModel()
{
CanvasSize = CanvasSize,
EclipseSize = EllipseSize
};
_dataModel = dataModel;
this.DataContext = dataModel;
}
#region 屬性
/// <summary>
/// 獲取或設定圓圈數量
/// 默認12
/// </summary>
public double EllipseCount
{
get { return (double)GetValue(EllipseCountProperty); }
set { SetValue(EllipseCountProperty, value); }
}
public static readonly DependencyProperty EllipseCountProperty =
DependencyProperty.Register("EllipseCount", typeof(double), typeof(ProgressBarControl),
new FrameworkPropertyMetadata(10.0, FrameworkPropertyMetadataOptions.AffectsRender));
/// <summary>
/// 獲取或設定圓圈大小
/// 默認10
/// </summary>
public double EllipseSize
{
get { return (double)GetValue(EllipseSizeProperty); }
set { SetValue(EllipseSizeProperty, value); }
}
public static readonly DependencyProperty EllipseSizeProperty =
DependencyProperty.Register("EllipseSize", typeof(double), typeof(ProgressBarControl),
new FrameworkPropertyMetadata(10.0, FrameworkPropertyMetadataOptions.AffectsRender));
/// <summary>
/// 獲取或設定面板大小
/// 默認80
/// </summary>
public double CanvasSize
{
get { return (double)GetValue(CanvasSizeProperty); }
set { SetValue(CanvasSizeProperty, value); }
}
public static readonly DependencyProperty CanvasSizeProperty =
DependencyProperty.Register("CanvasSize", typeof(double), typeof(ProgressBarControl),
new FrameworkPropertyMetadata(80.0, FrameworkPropertyMetadataOptions.AffectsRender));
/// <summary>
/// 獲取或設定每次旋轉角度
/// 默認10.0
/// </summary>
public double StepAngle
{
get { return (double)GetValue(StepAngleProperty); }
set { SetValue(StepAngleProperty, value); }
}
public static readonly DependencyProperty StepAngleProperty =
DependencyProperty.Register("StepAngle", typeof(double), typeof(ProgressBarControl),
new FrameworkPropertyMetadata(10.0, FrameworkPropertyMetadataOptions.AffectsRender));
/// <summary>
/// 獲取或設定每次旋轉間隔時間（毫秒）
/// 默認100毫秒
/// </summary>
public int TimeSpan
{
get { return (int)GetValue(TimeSpanProperty); }
set { SetValue(TimeSpanProperty, value); }
}
public static readonly DependencyProperty TimeSpanProperty =
DependencyProperty.Register("TimeSpan", typeof(int), typeof(ProgressBarControl),
new FrameworkPropertyMetadata(100, FrameworkPropertyMetadataOptions.AffectsRender));
#endregion
#region 方法
/// <summary>
/// Canvas加載
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HandleLoaded(object sender, RoutedEventArgs e)
{
//設定設定圓的位置和旋轉角度
SetEclipsePosition(_dataModel);
//DesignerProperties 提供用于與設計器進行通信的附加屬性，
if (!DesignerProperties.GetIsInDesignMode(this))
{
if (this.Visibility == System.Windows.Visibility.Visible)
{
//超過計時器間隔時發生，
animationTimer.Tick += HandleAnimationTick;
animationTimer.Start();
}
}
}
/// <summary>
/// 設定圓的位置和旋轉角度
/// </summary>
private void SetEclipsePosition(ProgressBarDataModel dataModel)
{
//圓周長就是：C = π * d 或者C=2*π*r（其中d是圓的直徑，r是圓的半徑）
double r = dataModel.R;
var children = ProgressBarCanvas.Children;
int count = children.Count;
double step = (Math.PI * 2) / count;
//根據圓中正弦、余弦計算距離
int index = 0;
foreach (var element in children)
{
var ellipse = element as Ellipse;
//透明度
var opacity = Convert.ToDouble(index) / (count - 1);
ellipse.SetValue(UIElement.OpacityProperty, opacity < 0.05 ? 0.05 : opacity);
//距離
double left = r + Math.Sin(step * index) * r;
ellipse.SetValue(Canvas.LeftProperty, left);
double top = r - Math.Cos(step * index) * r;
ellipse.SetValue(Canvas.TopProperty, top);
index++;
}
}
/// <summary>
/// Canvas卸載時
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HandleUnloaded(object sender, RoutedEventArgs e)
{
animationTimer.Stop();
//除去委托
animationTimer.Tick -= HandleAnimationTick;
}
/// <summary>
/// 超過計時器間隔時發生，
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HandleAnimationTick(object sender, EventArgs e)
{
//設定旋轉角度
SpinnerRotate.Angle = (SpinnerRotate.Angle + StepAngle) % 360;
}
#endregion
}
public class ProgressBarDataModel
{
public double EclipseSize { get; set; }
public double CanvasSize { get; set; }
public double ViewBoxSize
{
get
{
double length = Convert.ToDouble(CanvasSize) - Convert.ToDouble(EclipseSize);
return length;
}
}
public double EclipseLeftLength
{
get
{
double length = Convert.ToDouble(CanvasSize) / 2;
return length;
}
}
public double R
{
get
{
double length = (Convert.ToDouble(CanvasSize) - Convert.ToDouble(EclipseSize)) / 2;
return length;
}
}
}
應用
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;
using System.Windows.Threading;
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標籤：WPF