饼状图要比XYDiagram要简单一点，大体上也是那些东西，没有了X、Y坐标轴，也就没有了第二坐标，要简单一点。
PieChartControl.xaml
<UserControl x:Class="WpfControl.PieChartControl"
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:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
mc:Ignorable="d">
<Grid>
<dxc:ChartControl x:Name="chart"
MouseDown="chart_MouseDown"
MouseMove="chart_MouseMove"
MouseUp="chart_MouseUp">
<dxc:ChartControl.Titles>
<dxc:Title x:Name="title" Content="Title" Dock="Top" HorizontalAlignment="Center" VerticalAlignment="Top"/>
</dxc:ChartControl.Titles>
<dxc:SimpleDiagram2D x:Name="diagram2D">
</dxc:SimpleDiagram2D>
<dxc:ChartControl.Legend>
<dxc:Legend HorizontalPosition="Right"/>
</dxc:ChartControl.Legend>
</dxc:ChartControl>
</Grid>
</UserControl>
PieChartControl.cs
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using DevExpress.Xpf.Charts;
using Dugufeixue.Common;
namespace WpfControl
{
/// <summary>
/// PieChartControl.xaml 的交互逻辑
/// </summary>
public partial class PieChartControl : UserControl
{
const int clickDelta = ;
DateTime mouseDownTime;
bool rotate;
Point startPosition;
public PieChartControl(DataEntity de, bool isUseColor)
{
InitializeComponent();
LoadPieChart(de, isUseColor);
}
public void LoadPieChart(DataEntity de, bool isUseColor)
{
Series series= new PieSeries2D();
//设置饼状图Label样式
SeriesLabel label = new SeriesLabel();
label.Indent = ;
label.TextPattern = "{A}: {VP:P2}";
series.Label = label;
foreach (KeyValuePair<string, double> kvp in de.Dic)
{
//这里和XYDiagram不一样，饼状图只能用SeriesPoint添加点来创建Series，没找到其他的好方法
SeriesPoint point = new SeriesPoint(kvp.Key, kvp.Value);
if (isUseColor)
{
SolidColorBrush brush;
if (kvp.Key.Contains("运行"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00));
}
else if (kvp.Key.Contains("启动"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00));
}
else if (kvp.Key.Contains("正常"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00));
}
else if (kvp.Key.Contains("停止"))
{
brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00));
}
else if (kvp.Key.Contains("启炉"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00));
}
else if (kvp.Key.Contains("停炉"))
{
brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00));
}
else if (kvp.Key.Contains("开"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00));
}
else if (kvp.Key.Contains("关"))
{
brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00));
}
else if (kvp.Key.Contains("故障"))
{
brush = new SolidColorBrush(Color.FromRgb(0xFF, 0xFF, 0x00));
}
else if (kvp.Key.Contains("需监管"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0x00, 0xFF));
}
else if (kvp.Key.Contains("反馈"))
{
brush = new SolidColorBrush(Color.FromRgb(0x00, 0x00, 0xFF));
}
else if (kvp.Key.Contains("高料位报警"))
{
brush = new SolidColorBrush(Color.FromRgb(0xFF, 0xC0, 0xCB));
}
else if (kvp.Key.Contains("无状态"))
{
brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC));
}
else if (kvp.Key.Contains("无"))
{
brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC));
}
else
{
brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC));
}
//设置每一个扇形的不同颜色
point.Brush = brush;
}
series.Points.Add(point);
}
series.LabelsVisibility = true;
PieSeries2D.SetLabelPosition(series.Label,PieLabelPosition.Outside);
//设置Legend的格式
series.LegendTextPattern = "{A}: {VP:P2}";
diagram2D.Series.Add(series);
title.Content = de.Ytitle;
}
//设置饼状图的动画效果
bool IsClick(DateTime mouseUpTime)
{
return (mouseUpTime - mouseDownTime).TotalMilliseconds < clickDelta;
}
double CalcAngle(Point p1, Point p2)
{
Point center = new Point(chart.Diagram.ActualWidth / , chart.ActualHeight / );
Point relativeP1 = new Point(p1.X - center.X, p1.Y - center.Y);
Point relativeP2 = new Point(p2.X - center.X, p2.Y - center.Y);
double angleP1Radian = Math.Atan2(relativeP1.X, relativeP1.Y);
double angleP2Radian = Math.Atan2(relativeP2.X, relativeP2.Y);
double angle = (angleP2Radian - angleP1Radian) * / (Math.PI * );
if (angle > )
angle = - angle;
else if (angle < -)
angle = + angle;
return angle;
}
void chart_MouseUp(object sender, MouseButtonEventArgs e)
{
ChartHitInfo hitInfo = chart.CalcHitInfo(e.GetPosition(chart));
rotate = false;
if (hitInfo == null || hitInfo.SeriesPoint == null || !IsClick(DateTime.Now))
return;
double distance = PieSeries.GetExplodedDistance(hitInfo.SeriesPoint);
Storyboard storyBoard = new Storyboard();
DoubleAnimation animation = new DoubleAnimation();
animation.Duration = new Duration(new TimeSpan(, , , , ));
animation.To = distance > ? : 0.3;
storyBoard.Children.Add(animation);
Storyboard.SetTarget(animation, hitInfo.SeriesPoint);
Storyboard.SetTargetProperty(animation, new PropertyPath(PieSeries.ExplodedDistanceProperty));
storyBoard.Begin();
}
void chart_MouseDown(object sender, MouseButtonEventArgs e)
{
mouseDownTime = DateTime.Now;
Point position = e.GetPosition(chart);
ChartHitInfo hitInfo = chart.CalcHitInfo(position);
if (hitInfo != null && hitInfo.SeriesPoint != null)
{
rotate = true;
startPosition = position;
}
}
void chart_MouseMove(object sender, MouseEventArgs e)
{
Point position = e.GetPosition(chart);
ChartHitInfo hitInfo = chart.CalcHitInfo(position);
if (hitInfo == null)
return;
if (rotate && !IsClick(DateTime.Now))
{
PieSeries2D series = chart.Diagram.Series[] as PieSeries2D;
double angleDelta = CalcAngle(startPosition, position);
startPosition = position;
}
}
}
}