WPF實現雷達圖(仿英雄聯盟)的示例代碼
前言
有小夥伴提出需要實現雷達圖。
由於在WPF中沒有現成的雷達圖控件，所以我們自己實現一個。
PS：有更好的方式歡迎推薦。
實現代碼
一、創建 RadarChart.cs 菜單繼承 Control代碼如下
RadarChart.cs實現思路如下
1、RadarArray ：存放展示集合 。
2、重寫OnRender 。
3、根據三角函數和圓的半徑計算出圓上的N個點繪制成多邊形GetPolygonPoint()。
4、在繪制多邊形的時候因為需要多個大小不一的多邊形，則需要多次調用GetPolygonPoint()方法，最外層繪制150，中間層100，中心點層 50。
5、DrawPoints() 方法增加瞭一個bool參數isDrawText是否繪制Text文本，因為最外側需要繪制文本。
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
namespace WPFDevelopers.Controls
{
public class RadarChart:Control
{
public ObservableCollection<RadarModel> RadarArray
{
get { return (ObservableCollection<RadarModel>)GetValue(RadarArrayProperty); }
set { SetValue(RadarArrayProperty, value); }
}
public static readonly DependencyProperty RadarArrayProperty =
DependencyProperty.Register("RadarArray", typeof(ObservableCollection<RadarModel>), typeof(RadarChart), new PropertyMetadata(null));
static RadarChart()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(RadarChart), new FrameworkPropertyMetadata(typeof(RadarChart)));
}
protected override void OnRender(DrawingContext drawingContext)
{
DrawPoints(150, drawingContext,true);
DrawPoints(100, drawingContext);
DrawPoints(50, drawingContext);
var myPen = new Pen
{
Thickness = 4,
Brush = Brushes.DodgerBlue
};
myPen.Freeze();
StreamGeometry streamGeometry = new StreamGeometry();
using (StreamGeometryContext geometryContext = streamGeometry.Open())
{
var h = this.ActualHeight / 2;
var w = this.ActualWidth / 2;
PointCollection points = new PointCollection();
foreach (var item in RadarArray)
{
var ss = new Point((item.PointValue.X - w) / 100 * item.ValueMax + w,(item.PointValue.Y - h) / 100 * item.ValueMax + h);
points.Add(ss);
}
geometryContext.BeginFigure(points[points.Count - 1], true, true);
geometryContext.PolyLineTo(points, true, true);
}
streamGeometry.Freeze();
SolidColorBrush rectBrush = new SolidColorBrush(Colors.LightSkyBlue);
rectBrush.Opacity = 0.5;
drawingContext.DrawGeometry(rectBrush, myPen, streamGeometry);
}
void DrawPoints(int circleRadius, DrawingContext drawingContext,bool isDrawText = false)
{
var myPen = new Pen
{
Thickness = 2,
Brush = Brushes.Gainsboro
};
myPen.Freeze();
StreamGeometry streamGeometry = new StreamGeometry();
using (StreamGeometryContext geometryContext = streamGeometry.Open())
{
var h = this.ActualHeight / 2;
var w = this.ActualWidth / 2;
PointCollection points = null;
if (isDrawText)
points = GetPolygonPoint(new Point(w, h), circleRadius, RadarArray.Count, drawingContext);
else
points = GetPolygonPoint(new Point(w, h), circleRadius, RadarArray.Count);
geometryContext.BeginFigure(points[points.Count - 1], true, true);
geometryContext.PolyLineTo(points, true, true);
}
streamGeometry.Freeze();
drawingContext.DrawGeometry(null, myPen, streamGeometry);
}
private PointCollection GetPolygonPoint(Point center, double r, int polygonBound, DrawingContext drawingContext = null)
{
double g = 18;
double perangle = 360 / polygonBound;
double pi = Math.PI;
List<Point> values = new List<Point>();
for (int i = 0; i < polygonBound; i++)
{
Point p2 = new Point(r * Math.Cos(g * pi / 180) + center.X, r * Math.Sin(g * pi / 180) + center.Y);
if(drawingContext != null)
{
FormattedText formattedText = new FormattedText(
RadarArray[i].Text,
CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
new Typeface(new FontFamily("Arial"), FontStyles.Normal, FontWeights.Thin, FontStretches.Normal),
20.001D, Brushes.Black)
{
MaxLineCount = 1,
TextAlignment = TextAlignment.Justify,
Trimming = TextTrimming.CharacterEllipsis
};
RadarArray[i].PointValue = p2;
if (p2.Y > center.Y && p2.X < center.X)
drawingContext.DrawText(formattedText, new Point(p2.X - formattedText.Width - 5, p2.Y - formattedText.Height / 2));
else if (p2.Y < center.Y && p2.X > center.X)
drawingContext.DrawText(formattedText, new Point(p2.X, p2.Y - formattedText.Height));
else if (p2.Y < center.Y && p2.X < center.X)
drawingContext.DrawText(formattedText, new Point(p2.X - formattedText.Width - 5, p2.Y - formattedText.Height));
else if (p2.Y < center.Y && p2.X == center.X)
drawingContext.DrawText(formattedText, new Point(p2.X - formattedText.Width, p2.Y - formattedText.Height));
else
drawingContext.DrawText(formattedText, new Point(p2.X, p2.Y));
}
values.Add(p2);
g += perangle;
}
PointCollection pcollect = new PointCollection(values);
return pcollect;
}
}
}
二、創建RadarChartExample.xaml代碼如下
<UserControl x:Class="WPFDevelopers.Samples.ExampleViews.RadarChartExample"
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/yanjinhuagood/WPFDevelopers"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800">
<Grid Background="Gainsboro" >
<Border Background="White" Width="500" Height="500">
<Grid Margin="20,10">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="40"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="40"/>
<RowDefinition/>
</Grid.RowDefinitions>
<WrapPanel>
<Rectangle Width="6" Height="26" Fill="Black"/>
<TextBlock Text="能力圖" FontWeight="Black" FontSize="24" Padding="10,0"/>
</WrapPanel>
<wpfdev:RadarChart Grid.Column="0" Grid.Row="1" RadarArray="{Binding RadarModels,RelativeSource={RelativeSource AncestorType=local:RadarChartExample}}"/>
</Grid>
</Border>
</Grid>
</UserControl>
三、創建RadarChartExample.xaml.cs代碼如下
ReadrChartExample.cs 思路如下
1、ValueMax 需要註意最小值0，最大值100。
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Controls;
using WPFDevelopers.Controls;
namespace WPFDevelopers.Samples.ExampleViews
{
/// <summary>
/// RadarChartExample.xaml 的交互邏輯
/// </summary>
public partial class RadarChartExample : UserControl
{
public ObservableCollection<RadarModel> RadarModels
{
get { return (ObservableCollection<RadarModel>)GetValue(RadarModelsProperty); }
set { SetValue(RadarModelsProperty, value); }
}
public static readonly DependencyProperty RadarModelsProperty =
DependencyProperty.Register("RadarModels", typeof(ObservableCollection<RadarModel>), typeof(RadarChartExample), new PropertyMetadata(null));
List<ObservableCollection<RadarModel>> collectionList = new List<ObservableCollection<RadarModel>>();
public RadarChartExample()
{
InitializeComponent();
RadarModels = new ObservableCollection<RadarModel>();
var collection1 = new ObservableCollection<RadarModel>();
collection1.Add(new RadarModel { Text = "擊殺", ValueMax = 95});
collection1.Add(new RadarModel { Text = "生存", ValueMax = 80 });
collection1.Add(new RadarModel { Text = "助攻", ValueMax = 70 });
collection1.Add(new RadarModel { Text = "物理", ValueMax = 80 });
collection1.Add(new RadarModel { Text = "魔法", ValueMax = 90 });
collection1.Add(new RadarModel { Text = "防禦", ValueMax = 87 });
collection1.Add(new RadarModel { Text = "金錢", ValueMax = 59 });
var collection2 = new ObservableCollection<RadarModel>();
collection2.Add(new RadarModel { Text = "擊殺", ValueMax = 59 });
collection2.Add(new RadarModel { Text = "生存", ValueMax = 80 });
collection2.Add(new RadarModel { Text = "助攻", ValueMax = 90 });
collection2.Add(new RadarModel { Text = "物理", ValueMax = 70 });
collection2.Add(new RadarModel { Text = "魔法", ValueMax = 80 });
collection2.Add(new RadarModel { Text = "防禦", ValueMax = 90 });
collection2.Add(new RadarModel { Text = "金錢", ValueMax = 66 });
collectionList.AddRange(new[] { collection1, collection2 });
RadarModels = collectionList[0];
}
bool isRefresh = false;
private void Button_Click(object sender, RoutedEventArgs e)
{
if (!isRefresh)
RadarModels = collectionList[1];
else
RadarModels = collectionList[0];
isRefresh = !isRefresh;
}
}
}
效果預覽
數據來源於英雄聯盟用戶
數據1《屈越》
數據2《方拯》
以上就是WPF實現雷達圖(仿英雄聯盟)的示例代碼的詳細內容，更多關於WPF雷達圖的資料請關註WalkonNet其它相關文章！
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