WPF 实现圆形进度条
-
框架使用
.NET40
; -
Visual Studio 2019
; -
CircularProgressBar
继承ProgressBar
,在XAML
中创建两个Path
的Data
设置ArcSegment
修改第二个控件的Point
,设置StartPoint = new Point(Size.Width, 0)
设置起点。 -
创建依赖属性
Angle
作为修改ArcSegment
的Point
作为进度条的圆的闭合。 -
当进度条
ValueChanged
时创建DoubleAnimation
动画,修改Angle
。
示例代码
1) CircularProgressBar.xaml
代码如下:
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< ResourceDictionary xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml" xmlns:controls = "clr-namespace:WPFDevelopers.Controls" xmlns:convert = "clr-namespace:WPFDevelopers.Converts" > < ResourceDictionary.MergedDictionaries > < ResourceDictionary Source = "Basic/ControlBasic.xaml" /> </ ResourceDictionary.MergedDictionaries > < convert:AngleToPointConverter x:Key = "prConverter" /> < convert:AngleToIsLargeConverter x:Key = "isLargeConverter" /> < Style TargetType = "{x:Type controls:CircularProgressBar}" BasedOn = "{StaticResource ControlBasicStyle}" > < Setter Property = "Maximum" Value = "100" /> < Setter Property = "StrokeThickness" Value = "10" /> < Setter Property = "Foreground" Value = "{DynamicResource InfoSolidColorBrush}" /> < Setter Property = "Background" Value = "{DynamicResource PrimaryNormalSolidColorBrush}" /> < Setter Property = "HorizontalAlignment" Value = "Center" /> < Setter Property = "VerticalAlignment" Value = "Center" /> <!--<Setter Property="Width" Value="100"/> <Setter Property="Height" Value="100"/>--> < Setter Property = "Template" > < Setter.Value > < ControlTemplate TargetType = "{x:Type controls:CircularProgressBar}" > < controls:SmallPanel Width = "{Binding ElementName=PART_Path,Path=ActualWidth}" Height = "{Binding ElementName=PART_Path,Path=ActualHeight}" HorizontalAlignment = "{TemplateBinding HorizontalAlignment}" VerticalAlignment = "{TemplateBinding VerticalAlignment}" > < Canvas > < Path Stroke = "{TemplateBinding BorderBrush}" StrokeThickness = "{TemplateBinding BrushStrokeThickness}" x:Name = "PART_Path" > < Path.Data > < PathGeometry > < PathFigure x:Name = "PART_PathFigure" > < ArcSegment SweepDirection = "Clockwise" IsLargeArc = "True" x:Name = "PART_ArcSegment" > </ ArcSegment > </ PathFigure > </ PathGeometry > </ Path.Data > </ Path > < Path Stroke = "{TemplateBinding Background}" StrokeThickness = "{TemplateBinding StrokeThickness}" > < Path.Data > < PathGeometry > < PathFigure x:Name = "PART_PathFigureAngle" > < ArcSegment SweepDirection = "Clockwise" IsLargeArc = "{Binding Path=Angle, Converter={StaticResource isLargeConverter}, RelativeSource={RelativeSource FindAncestor, AncestorType=ProgressBar}}" x:Name = "PART_ArcSegmentAngle" > < ArcSegment.Point > < MultiBinding Converter = "{StaticResource prConverter}" > < Binding Path = "Angle" RelativeSource = "{RelativeSource FindAncestor, AncestorType=ProgressBar}" /> < Binding Path = "Size" RelativeSource = "{RelativeSource FindAncestor, AncestorType=ProgressBar}" /> </ MultiBinding > </ ArcSegment.Point > </ ArcSegment > </ PathFigure > </ PathGeometry > </ Path.Data > </ Path > </ Canvas > < TextBlock Foreground = "{TemplateBinding Foreground}" Text="{Binding Path = Value , StringFormat={}{0}%, RelativeSource={RelativeSource TemplatedParent}}" FontSize = "{TemplateBinding FontSize}" VerticalAlignment = "Center" HorizontalAlignment = "Center" x:Name = "PART_TextBlock" /> </ controls:SmallPanel > </ ControlTemplate > </ Setter.Value > </ Setter > </ Style > </ ResourceDictionary > |
2) CircularProgressBar.xaml.cs
代码如下:
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using System; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Media.Animation; namespace WPFDevelopers.Controls { [TemplatePart(Name = ArcSegmentTemplateName, Type = typeof (ArcSegment))] [TemplatePart(Name = ArcSegmentAngleTemplateName, Type = typeof (ArcSegment))] [TemplatePart(Name = PathFigureTemplateName, Type = typeof (PathFigure))] [TemplatePart(Name = PathFigureAngleTemplateName, Type = typeof (PathFigure))] [TemplatePart(Name = TextBlockTemplateName, Type = typeof (TextBlock))] public class CircularProgressBar : ProgressBar { private const string ArcSegmentTemplateName = "PART_ArcSegment" ; private const string ArcSegmentAngleTemplateName = "PART_ArcSegmentAngle" ; private const string PathFigureTemplateName = "PART_PathFigure" ; private const string PathFigureAngleTemplateName = "PART_PathFigureAngle" ; private const string TextBlockTemplateName = "PART_TextBlock" ; private ArcSegment _arcSegment, _arcSegmentAngle; private PathFigure _pathFigure, _pathFigureAngle; private TextBlock _textBlock; public static readonly DependencyProperty SizeProperty = DependencyProperty.Register( "Size" , typeof (Size), typeof (CircularProgressBar), new PropertyMetadata( new Size(50,50))); public static readonly DependencyProperty AngleProperty = DependencyProperty.Register( "Angle" , typeof ( double ), typeof (CircularProgressBar), new PropertyMetadata(0.0)); public static readonly DependencyProperty StrokeThicknessProperty = DependencyProperty.Register( "StrokeThickness" , typeof ( double ), typeof (CircularProgressBar), new PropertyMetadata(10.0)); public static readonly DependencyProperty BrushStrokeThicknessProperty = DependencyProperty.Register( "BrushStrokeThickness" , typeof ( double ), typeof (CircularProgressBar), new PropertyMetadata(1.0)); public CircularProgressBar() { ValueChanged += CircularProgressBar_ValueChanged; } public override void OnApplyTemplate() { base .OnApplyTemplate(); if (Size.Width != Size.Height) { var max = Math.Max(Size.Width, Size.Height); Size = new Size(max, max); } _pathFigure = GetTemplateChild(PathFigureTemplateName) as PathFigure; _pathFigureAngle = GetTemplateChild(PathFigureAngleTemplateName) as PathFigure; _pathFigure.StartPoint = new Point(Size.Width, 0); _pathFigureAngle.StartPoint = new Point(Size.Width, 0); _arcSegment = GetTemplateChild(ArcSegmentTemplateName) as ArcSegment; _arcSegment.Size = Size; _arcSegment.Point = new Point(Size.Width - 0.000872664626, 7.61543361704753E-09); _arcSegmentAngle = GetTemplateChild(ArcSegmentAngleTemplateName) as ArcSegment; _arcSegmentAngle.Size = Size; _textBlock = GetTemplateChild(TextBlockTemplateName) as TextBlock; if (Size.Width < 15) { FontSize = 8; } } public Size Size { get => (Size)GetValue(SizeProperty); set => SetValue(SizeProperty, value); } public double Angle { get => ( double )GetValue(AngleProperty); set => SetValue(AngleProperty, value); } public double StrokeThickness { get => ( double )GetValue(StrokeThicknessProperty); set => SetValue(StrokeThicknessProperty, value); } public double BrushStrokeThickness { get => ( double )GetValue(BrushStrokeThicknessProperty); set => SetValue(BrushStrokeThicknessProperty, value); } private void CircularProgressBar_ValueChanged( object sender, RoutedPropertyChangedEventArgs< double > e) { var bar = sender as CircularProgressBar; var currentAngle = bar.Angle; var targetAngle = e.NewValue / bar.Maximum * 359.999; var anim = new DoubleAnimation(currentAngle, targetAngle, TimeSpan.FromMilliseconds(500)); bar.BeginAnimation(AngleProperty, anim, HandoffBehavior.SnapshotAndReplace); } } } |
3) AngleToPointConverter.cs
代码如下:
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using System; using System.Globalization; using System.Windows; using System.Windows.Data; namespace WPFDevelopers.Converts { internal class AngleToPointConverter : IMultiValueConverter { public object Convert( object [] values, Type targetType, object parameter, CultureInfo culture) { var angle = ( double )values[0]; var size = (Size)values[1]; var radius = ( double )size.Height; var piang = angle * Math.PI / 180; var px = Math.Sin(piang) * radius + radius; var py = -Math.Cos(piang) * radius + radius; return new Point(px, py); } public object [] ConvertBack( object value, Type[] targetTypes, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } } |
4) AngleToIsLargeConverter.cs
代码如下:
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using System; using System.Globalization; using System.Windows.Data; namespace WPFDevelopers.Converts { internal class AngleToIsLargeConverter : IValueConverter { public object Convert( object value, Type targetType, object parameter, CultureInfo culture) { var angle = ( double )value; return angle > 180; } public object ConvertBack( object value, Type targetTypes, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } } |
5) CircularMenuExample.xaml
代码如下:
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< UserControl x:Class = "WPFDevelopers.Samples.ExampleViews.CircularMenuExample" 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:WPFDevelopers.Samples.ExampleViews" xmlns:wpfdev = "https://github.com/WPFDevelopersOrg/WPFDevelopers" xmlns:controls = "clr-namespace:WPFDevelopers.Samples.Controls" mc:Ignorable = "d" d:DesignHeight = "450" d:DesignWidth = "800" > < controls:CodeViewer > < StackPanel Background = "Black" > < TextBlock Text = "微信公众号:WPFDevelopers" FontSize = "40" Foreground = "#A9CC32" FontWeight = "Bold" Margin = "50,10,0,20" /> < wpfdev:CircularMenu ItemsSource = "{Binding MenuArray,RelativeSource={RelativeSource AncestorType=local:CircularMenuExample}}" SelectionChanged = "CircularMenu_SelectionChanged" /> </ StackPanel > < controls:CodeViewer.SourceCodes > < controls:SourceCodeModel CodeSource = "/WPFDevelopers.SamplesCode;component/ExampleViews/CircularMenuExample.xaml" CodeType = "Xaml" /> < controls:SourceCodeModel CodeSource = "/WPFDevelopers.SamplesCode;component/ExampleViews/CircularMenuExample.xaml.cs" CodeType = "CSharp" /> </ controls:CodeViewer.SourceCodes > </ controls:CodeViewer > </ UserControl > |
效果图
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原文链接:https://mp.weixin.qq.com/s/1ql9MCQqK2TfKGIoBtYXVw