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311 lines
12 KiB
C#
311 lines
12 KiB
C#
using System;
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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.Data;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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using HslCommunication.Core;
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namespace HslCommunication.Controls
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{
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/// <summary>
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/// 一个饼图的控件
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/// </summary>
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public partial class UserPieChart : UserControl
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{
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/// <summary>
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/// 实例化一个饼图的控件
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/// </summary>
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public UserPieChart( )
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{
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InitializeComponent( );
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random = new Random( );
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DoubleBuffered = true;
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formatCenter = new StringFormat( );
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formatCenter.Alignment = StringAlignment.Center;
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formatCenter.LineAlignment = StringAlignment.Center;
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pieItems = new HslPieItem[0];
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}
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private void UserPieChart_Load( object sender, EventArgs e )
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{
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}
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#region Private
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private HslPieItem[] pieItems = new HslPieItem[0]; // 饼图的数据
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private Random random = null; // 随机数
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private StringFormat formatCenter = null; // 格式化的文本位置
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private int margin = 40; // 边界距离
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private bool m_IsRenderPercent = false; // 是否显示百分比
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private bool m_IsRenderSmall = true; // 是否在图形上显示占比非常小的文本信息
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#endregion
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/// <summary>
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/// 是否显示百分比信息
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/// </summary>
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[Browsable( true )]
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[Category( "外观" )]
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[DefaultValue( false )]
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[Description( "获取或设置是否显示百分比占用" )]
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public bool IsRenderPercent
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{
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get { return m_IsRenderPercent; }
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set { m_IsRenderPercent = value; Invalidate( ); }
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}
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/// <summary>
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/// 是否在图形上显示占比非常小的文本信息
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/// </summary>
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[Browsable(true)]
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[Category("外观")]
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[Description("获取或设置是否显示占比很小的文本信息")]
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[DefaultValue(true)]
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public bool IsRenderSmall
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{
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get { return m_IsRenderSmall; }
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set { m_IsRenderSmall = value; Invalidate( ); }
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}
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private void SetMarginPaint( int value )
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{
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if (value > 500)
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{
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margin = 80;
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}
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else if (value > 300)
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{
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margin = 60;
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}
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else
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{
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margin = 40;
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}
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}
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private Point GetCenterPoint( out int width )
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{
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if (Width > Height)
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{
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SetMarginPaint( Height );
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width = Height / 2 - margin;
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return new Point( Height / 2 - 1, Height / 2 - 1 );
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}
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else
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{
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SetMarginPaint( Width );
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width = Width / 2 - margin;
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return new Point( Width / 2 - 1, Width / 2 - 1 );
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}
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}
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/// <summary>
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/// 随机生成颜色，该颜色相对于白色为深色颜色
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/// </summary>
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/// <returns></returns>
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private Color GetRandomColor( )
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{
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int int_Red = random.Next( 256 );
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int int_Green = random.Next( 256 );
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int int_Blue = (int_Red + int_Green > 430) ? random.Next( 100 ) : random.Next( 200 );
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return Color.FromArgb( int_Red, int_Green, int_Blue );
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}
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private void UserPieChart_Paint( object sender, PaintEventArgs e )
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{
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if (!Authorization.nzugaydgwadawdibbas( )) return;
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// 画刷初始化
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e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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// 开始绘制饼图，寻找中心点
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Point center = GetCenterPoint( out int width );
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Rectangle rect_center = new Rectangle( center.X - width, center.Y - width, width + width, width + width );
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if (width > 0 && pieItems.Length > 0)
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{
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e.Graphics.FillEllipse( Brushes.AliceBlue, rect_center );
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e.Graphics.DrawEllipse( Pens.DodgerBlue, rect_center );
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Rectangle rect_tran = new Rectangle( rect_center.X - center.X, rect_center.Y - center.Y, rect_center.Width, rect_center.Height );
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e.Graphics.TranslateTransform( center.X, center.Y );
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e.Graphics.RotateTransform( 90 );
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e.Graphics.DrawLine( Pens.DimGray, 0, 0, width, 0 );
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// 计算分布
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int totle = pieItems.Sum( item => item.Value );
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float totleAngle = 0; // 本次绘制的角度
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float lastAngle = -90; // 上一次的角度
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for (int i = 0; i < pieItems.Length; i++)
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{
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float single = 0;
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if (totle == 0)
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{
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single = 360 / pieItems.Length;
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}
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else
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{
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single = Convert.ToSingle( pieItems[i].Value * 1.0d / totle * 360 );
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}
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using (Brush brush = new SolidBrush( pieItems[i].Back ))
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{
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e.Graphics.FillPie( brush, rect_tran, 0, -single );
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}
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e.Graphics.RotateTransform( 0 - single / 2 );
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if (single < 2f && !IsRenderSmall)
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{
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totleAngle += single;
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}
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else
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{
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// 画标线
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totleAngle += single / 2;
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int mark = 8;
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if (totleAngle < 45 || totleAngle > 315) mark = 15;
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if (totleAngle > 135 && totleAngle < 225) mark = 15;
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e.Graphics.DrawLine( Pens.DimGray, width * 2 / 3, 0, width + mark, 0 );
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e.Graphics.TranslateTransform( width + mark, 0 );
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if (totleAngle - lastAngle < 5)
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{
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// 两次的标线非常接近
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}
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lastAngle = totleAngle;
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if (totleAngle < 90)
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{
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e.Graphics.RotateTransform( totleAngle - 90 );
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e.Graphics.DrawLine( Pens.DimGray, 0, 0, margin - mark, 0 );
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e.Graphics.DrawString( pieItems[i].Name, Font, Brushes.DimGray, new Point( 0, -Font.Height ) );
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if (IsRenderPercent) e.Graphics.DrawString( Math.Round( single * 100 / 360, 2 ).ToString( ) + "%", Font, Brushes.DodgerBlue, new Point( 0, 1 ) );
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e.Graphics.RotateTransform( 90 - totleAngle );
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}
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else if (totleAngle < 180)
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{
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e.Graphics.RotateTransform( totleAngle - 90 );
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e.Graphics.DrawLine( Pens.DimGray, 0, 0, margin - mark, 0 );
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e.Graphics.DrawString( pieItems[i].Name, Font, Brushes.DimGray, new Point( 0, -Font.Height ) );
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if (IsRenderPercent) e.Graphics.DrawString( Math.Round( single * 100 / 360, 2 ).ToString( ) + "%", Font, Brushes.DodgerBlue, new Point( 0, 1 ) );
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e.Graphics.RotateTransform( 90 - totleAngle );
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}
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else if (totleAngle < 270)
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{
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e.Graphics.RotateTransform( totleAngle - 270 );
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e.Graphics.DrawLine( Pens.DimGray, 0, 0, margin - mark, 0 );
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e.Graphics.TranslateTransform( margin - 8, 0 );
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e.Graphics.RotateTransform( 180 );
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e.Graphics.DrawString( pieItems[i].Name, Font, Brushes.DimGray, new Point( 0, -Font.Height ) );
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if (IsRenderPercent) e.Graphics.DrawString( Math.Round( single * 100 / 360, 2 ).ToString( ) + "%", Font, Brushes.DodgerBlue, new Point( 0, 1 ) );
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e.Graphics.RotateTransform( -180 );
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e.Graphics.TranslateTransform( 8 - margin, 0 );
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e.Graphics.RotateTransform( 270 - totleAngle );
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}
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else
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{
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e.Graphics.RotateTransform( totleAngle - 270 );
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e.Graphics.DrawLine( Pens.DimGray, 0, 0, margin - mark, 0 );
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e.Graphics.TranslateTransform( margin - 8, 0 );
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e.Graphics.RotateTransform( 180 );
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e.Graphics.DrawString( pieItems[i].Name, Font, Brushes.DimGray, new Point( 0, -Font.Height ) );
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if (IsRenderPercent) e.Graphics.DrawString( Math.Round( single * 100 / 360, 2 ).ToString( ) + "%", Font, Brushes.DodgerBlue, new Point( 0, 1 ) );
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e.Graphics.RotateTransform( -180 );
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e.Graphics.TranslateTransform( 8 - margin, 0 );
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e.Graphics.RotateTransform( 270 - totleAngle );
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}
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e.Graphics.TranslateTransform( -width - mark, 0 );
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e.Graphics.RotateTransform( 0 - single / 2 );
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totleAngle += single / 2;
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}
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}
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e.Graphics.ResetTransform( );
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}
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else
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{
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e.Graphics.FillEllipse( Brushes.AliceBlue, rect_center );
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e.Graphics.DrawEllipse( Pens.DodgerBlue, rect_center );
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e.Graphics.DrawString( "空", Font, Brushes.DimGray, rect_center, formatCenter );
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}
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}
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#region Public Method
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/// <summary>
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/// 设置显示的数据源
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/// </summary>
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/// <param name="source">特殊的显示对象</param>
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/// <exception cref="ArgumentNullException"></exception>
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public void SetDataSource( HslPieItem[] source )
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{
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if (source != null)
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{
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pieItems = source;
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Invalidate( );
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}
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}
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/// <summary>
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/// 根据名称和值进行数据源的显示，两者的长度需要一致
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/// </summary>
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/// <param name="names">名称</param>
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/// <param name="values">值</param>
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/// <exception cref="ArgumentNullException"></exception>
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public void SetDataSource( string[] names, int[] values )
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{
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if (names == null) throw new ArgumentNullException( "names" );
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if (values == null) throw new ArgumentNullException( "values" );
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if (names.Length != values.Length) throw new Exception( "两个数组的长度不一致！" );
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pieItems = new HslPieItem[names.Length];
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for (int i = 0; i < names.Length; i++)
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{
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pieItems[i] = new HslPieItem( )
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{
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Name = names[i],
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Value = values[i],
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Back = GetRandomColor( ),
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};
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}
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Invalidate( );
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}
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#endregion
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}
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}
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