261 lines
9.3 KiB
C#
261 lines
9.3 KiB
C#
/******************************************************************************
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* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
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* CopyRight (C) 2012-2020 ShenYongHua(沈永华).
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* QQ群：56829229 QQ：17612584 EMail：SunnyUI@qq.com
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*
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* Blog: https://www.cnblogs.com/yhuse
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* Gitee: https://gitee.com/yhuse/SunnyUI
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* GitHub: https://github.com/yhuse/SunnyUI
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*
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* SunnyUI.dll can be used for free under the GPL-3.0 license.
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* If you use this code, please keep this note.
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* 如果您使用此代码，请保留此说明。
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******************************************************************************
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* 文件名称: UIPieChart.cs
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* 文件说明: 饼状图
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* 当前版本: V2.2
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* 创建日期: 2020-06-06
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*
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* 2020-06-06: V2.2.5 增加文件说明
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******************************************************************************/
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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[ToolboxItem(true)]
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public sealed class UIPieChart : UIChart
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{
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protected override void CreateEmptyOption()
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{
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if (emptyOption != null) return;
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UIPieOption option = new UIPieOption();
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option.Title = new UITitle();
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option.Title.Text = "SunnyUI";
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option.Title.SubText = "PieChart";
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var series = new UIPieSeries();
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series.Name = "饼状图";
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series.Center = new UICenter(50, 55);
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series.Radius = 70;
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for (int i = 0; i < 5; i++)
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{
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series.AddData("Data" + i, (i + 1) * 20);
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}
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option.Series.Add(series);
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emptyOption = option;
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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base.OnSizeChanged(e);
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CalcData(PieOption);
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}
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protected override void DrawOption(Graphics g)
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{
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if (PieOption == null) return;
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DrawTitle(g, PieOption.Title);
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DrawSeries(g, PieOption.Series);
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DrawLegend(g, PieOption.Legend);
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}
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protected override void CalcData(UIOption option)
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{
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Angles.Clear();
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UIPieOption o = (UIPieOption)option;
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if (o == null || o.Series == null || o.Series.Count == 0) return;
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UITemplate template = null;
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if (o.ToolTip != null)
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{
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template = new UITemplate(o.ToolTip.Formatter);
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}
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for (int pieIndex = 0; pieIndex < o.Series.Count; pieIndex++)
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{
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var pie = o.Series[pieIndex];
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Angles.TryAdd(pieIndex, new ConcurrentDictionary<int, Angle>());
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double all = 0;
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foreach (var data in pie.Data)
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{
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all += data.Value;
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}
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if (all.IsZero()) return;
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float start = 0;
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for (int i = 0; i < pie.Data.Count; i++)
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{
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float angle = (float)(pie.Data[i].Value * 360.0f / all);
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float percent = (float)(pie.Data[i].Value * 100.0f / all);
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string text = "";
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if (o.ToolTip != null)
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{
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try
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{
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if (template != null)
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{
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template.Set("a", pie.Name);
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template.Set("b", pie.Data[i].Name);
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template.Set("c", pie.Data[i].Value.ToString(o.ToolTip.ValueFormat));
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template.Set("d", percent.ToString("F2"));
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text = template.Render();
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}
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}
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catch
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{
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text = pie.Data[i].Name + " : " + pie.Data[i].Value.ToString("F2") + "(" + percent.ToString("F2") + "%)";
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if (pie.Name.IsValid()) text = pie.Name + '\n' + text;
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}
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}
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Angles[pieIndex].AddOrUpdate(i, new Angle(start, angle, text));
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start += angle;
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}
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}
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}
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private void DrawSeries(Graphics g, List<UIPieSeries> series)
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{
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if (series == null || series.Count == 0) return;
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for (int pieIndex = 0; pieIndex < series.Count; pieIndex++)
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{
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var pie = series[pieIndex];
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RectangleF rect = GetSeriesRect(pie);
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for (int azIndex = 0; azIndex < pie.Data.Count; azIndex++)
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{
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Color color = ChartStyle.SeriesColor[azIndex % ChartStyle.ColorCount];
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RectangleF rectx = new RectangleF(rect.X - 10, rect.Y - 10, rect.Width + 20, rect.Width + 20);
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g.FillPie(color, (ActivePieIndex == pieIndex && ActiveAzIndex == azIndex) ? rectx : rect, Angles[pieIndex][azIndex].Start - 90, Angles[pieIndex][azIndex].Sweep);
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Angles[pieIndex][azIndex].TextSize = g.MeasureString(Angles[pieIndex][azIndex].Text, legendFont);
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}
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}
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}
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private readonly ConcurrentDictionary<int, ConcurrentDictionary<int, Angle>> Angles = new ConcurrentDictionary<int, ConcurrentDictionary<int, Angle>>();
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[Browsable(false)]
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private UIPieOption PieOption
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{
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get
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{
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UIOption option = Option ?? EmptyOption;
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UIPieOption o = (UIPieOption)option;
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return o;
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}
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}
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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if (PieOption.SeriesCount == 0)
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{
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SetPieAndAzIndex(-1, -1);
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return;
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}
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for (int pieIndex = 0; pieIndex < PieOption.SeriesCount; pieIndex++)
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{
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RectangleF rect = GetSeriesRect(PieOption.Series[pieIndex]);
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if (!e.Location.InRect(rect)) continue;
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PointF pf = new PointF(rect.Left + rect.Width / 2.0f, rect.Top + rect.Height / 2.0f);
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if (MathEx.CalcDistance(e.Location, pf) * 2 > rect.Width) continue;
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double az = MathEx.CalcAngle(e.Location, pf);
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for (int azIndex = 0; azIndex < PieOption.Series[pieIndex].Data.Count; azIndex++)
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{
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Angle angle = Angles[pieIndex][azIndex];
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if (az >= angle.Start && az <= angle.Start + angle.Sweep)
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{
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SetPieAndAzIndex(pieIndex, azIndex);
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if (tip.Text != angle.Text)
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{
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tip.Text = angle.Text;
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tip.Size = new Size((int)angle.TextSize.Width + 4, (int)angle.TextSize.Height + 4);
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}
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if (az >= 0 && az < 90)
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{
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tip.Top = e.Location.Y + 20;
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tip.Left = e.Location.X - tip.Width;
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}
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else if (az >= 90 && az < 180)
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{
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tip.Left = e.Location.X - tip.Width;
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tip.Top = e.Location.Y - tip.Height - 2;
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}
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else if (az >= 180 && az < 270)
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{
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tip.Left = e.Location.X;
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tip.Top = e.Location.Y - tip.Height - 2;
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}
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else if (az >= 270 && az < 360)
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{
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tip.Left = e.Location.X + 15;
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tip.Top = e.Location.Y + 20;
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}
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if (!tip.Visible) tip.Visible = angle.Text.IsValid();
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return;
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}
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}
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}
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SetPieAndAzIndex(-1, -1);
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tip.Visible = false;
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}
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private int ActiveAzIndex = -1;
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private int ActivePieIndex = -1;
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private void SetPieAndAzIndex(int pieIndex, int azIndex)
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{
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if (ActivePieIndex != pieIndex || ActiveAzIndex != azIndex)
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{
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ActivePieIndex = pieIndex;
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ActiveAzIndex = azIndex;
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Invalidate();
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}
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}
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private RectangleF GetSeriesRect(UIPieSeries series)
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{
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int left = series.Center.Left;
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int top = series.Center.Top;
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left = Width * left / 100;
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top = Height * top / 100;
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float halfRadius = Math.Min(Width, Height) * series.Radius / 200.0f;
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return new RectangleF(left - halfRadius, top - halfRadius, halfRadius * 2, halfRadius * 2);
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}
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private class Angle
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{
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public float Start { get; set; }
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public float Sweep { get; set; }
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public Angle(float start, float sweep, string text)
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{
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Start = start;
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Sweep = sweep;
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Text = text;
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}
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public string Text { get; set; }
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public SizeF TextSize { get; set; }
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}
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}
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} |