（六十一）c#Winform自定义控件-信号灯（工业）-HZHControls

官网

http://www.hzhcontrols.com

前提

入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。

GitHub：https://github.com/kwwwvagaa/NetWinformControl

码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git

如果觉得写的还行，请点个 star 支持一下吧

欢迎前来交流探讨： 企鹅群568015492 

麻烦博客下方点个【推荐】，谢谢

NuGet

Install-Package HZH_Controls

目录

https://www.cnblogs.com/bfyx/p/11364884.html

用处及效果

准备工作

依然使用GDI+绘画，这个比较简单，就是画圆

开始

新增一个类UCSignalLamp，继承UserControl

添加属性

 /// <summary>
         /// The is show border
         /// </summary>
         private bool isShowBorder = false;

         /// <summary>
         /// Gets or sets a value indicating whether this instance is show border.
         /// </summary>
         /// <value><c>true</c> if this instance is show border; otherwise, <c>false</c>.</value>
         [Description("是否显示边框"), Category("自定义")]
         public bool IsShowBorder
         {
             get { return isShowBorder; }
             set
             {
                 isShowBorder = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The lamp color
         /// </summary>
         private Color[] lampColor = new Color[] { Color.FromArgb(, , ) };

         /// <summary>
         /// Gets or sets the color of the lamp.
         /// </summary>
         /// <value>The color of the lamp.</value>
         [Description("灯颜色，当需要闪烁时，至少需要2个及以上颜色，不需要闪烁则至少需要1个颜色"), Category("自定义")]
         public Color[] LampColor
         {
             get { return lampColor; }
             set
             {
                 if (value == null || value.Length <= )
                     return;
                 lampColor = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The is highlight
         /// </summary>
         private bool isHighlight = true;

         /// <summary>
         /// Gets or sets a value indicating whether this instance is highlight.
         /// </summary>
         /// <value><c>true</c> if this instance is highlight; otherwise, <c>false</c>.</value>
         [Description("是否高亮显示"), Category("自定义")]
         public bool IsHighlight
         {
             get { return isHighlight; }
             set
             {
                 isHighlight = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The twinkle speed
         /// </summary>
         private int twinkleSpeed = ;

         /// <summary>
         /// Gets or sets the twinkle speed.
         /// </summary>
         /// <value>The twinkle speed.</value>
         [Description("闪烁间隔时间（毫秒），当为0时不闪烁"), Category("自定义")]
         public int TwinkleSpeed
         {
             get { return twinkleSpeed; }
             set
             {
                 if (value < )
                     return;
                 twinkleSpeed = value;
                 if (value ==  || lampColor.Length <= )
                 {
                     timer.Enabled = false;
                 }
                 else
                 {
                     intColorIndex = ;
                     timer.Interval = value;
                     timer.Enabled = true;
                 }
                 Refresh();
             }
         }
         /// <summary>
         /// The timer
         /// </summary>
         Timer timer;
         /// <summary>
         /// The int color index
         /// </summary>
         int intColorIndex = ;

重绘

  protected override void OnPaint(PaintEventArgs e)
         {
             base.OnPaint(e);
             var g = e.Graphics;
             g.SetGDIHigh();
             Color c1 = lampColor[intColorIndex];
             g.FillEllipse(new SolidBrush(c1), this.ClientRectangle);

             if (isHighlight)
             {
                 GraphicsPath gp = new GraphicsPath();

                 Rectangle rec = new Rectangle(, , this.Width - , this.Height - );
                 gp.AddEllipse(rec);

                 Color[] surroundColor = new Color[] { c1 };
                 PathGradientBrush pb = new PathGradientBrush(gp);
                 pb.CenterColor = Color.White;
                 pb.SurroundColors = surroundColor;
                 g.FillPath(pb, gp);
             }

             if (isShowBorder)
             {
                 g.DrawEllipse(new Pen(new SolidBrush(this.BackColor), ), new Rectangle(, , this.Width - , this.Height - ));
             }
         }

全部代码

 // ***********************************************************************
 // Assembly         : HZH_Controls
 // Created          : 2019-09-09
 //
 // ***********************************************************************
 // <copyright file="UCSignalLamp.cs">
 //     Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
 // </copyright>
 //
 // Blog: https://www.cnblogs.com/bfyx
 // GitHub：https://github.com/kwwwvagaa/NetWinformControl
 // gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
 //
 // If you use this code, please keep this note.
 // ***********************************************************************
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using System.ComponentModel;

 namespace HZH_Controls.Controls.FactoryControls.Lamp
 {
     /// <summary>
     /// Class UCSignalLamp.
     /// Implements the <see cref="System.Windows.Forms.UserControl" />
     /// </summary>
     /// <seealso cref="System.Windows.Forms.UserControl" />
     public class UCSignalLamp : UserControl
     {
         /// <summary>
         /// The is show border
         /// </summary>
         private bool isShowBorder = false;

         /// <summary>
         /// Gets or sets a value indicating whether this instance is show border.
         /// </summary>
         /// <value><c>true</c> if this instance is show border; otherwise, <c>false</c>.</value>
         [Description("是否显示边框"), Category("自定义")]
         public bool IsShowBorder
         {
             get { return isShowBorder; }
             set
             {
                 isShowBorder = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The lamp color
         /// </summary>
         private Color[] lampColor = new Color[] { Color.FromArgb(, , ) };

         /// <summary>
         /// Gets or sets the color of the lamp.
         /// </summary>
         /// <value>The color of the lamp.</value>
         [Description("灯颜色，当需要闪烁时，至少需要2个及以上颜色，不需要闪烁则至少需要1个颜色"), Category("自定义")]
         public Color[] LampColor
         {
             get { return lampColor; }
             set
             {
                 if (value == null || value.Length <= )
                     return;
                 lampColor = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The is highlight
         /// </summary>
         private bool isHighlight = true;

         /// <summary>
         /// Gets or sets a value indicating whether this instance is highlight.
         /// </summary>
         /// <value><c>true</c> if this instance is highlight; otherwise, <c>false</c>.</value>
         [Description("是否高亮显示"), Category("自定义")]
         public bool IsHighlight
         {
             get { return isHighlight; }
             set
             {
                 isHighlight = value;
                 Refresh();
             }
         }

         /// <summary>
         /// The twinkle speed
         /// </summary>
         private int twinkleSpeed = ;

         /// <summary>
         /// Gets or sets the twinkle speed.
         /// </summary>
         /// <value>The twinkle speed.</value>
         [Description("闪烁间隔时间（毫秒），当为0时不闪烁"), Category("自定义")]
         public int TwinkleSpeed
         {
             get { return twinkleSpeed; }
             set
             {
                 if (value < )
                     return;
                 twinkleSpeed = value;
                 if (value ==  || lampColor.Length <= )
                 {
                     timer.Enabled = false;
                 }
                 else
                 {
                     intColorIndex = ;
                     timer.Interval = value;
                     timer.Enabled = true;
                 }
                 Refresh();
             }
         }
         /// <summary>
         /// The timer
         /// </summary>
         Timer timer;
         /// <summary>
         /// The int color index
         /// </summary>
         int intColorIndex = ;
         /// <summary>
         /// Initializes a new instance of the <see cref="UCSignalLamp"/> class.
         /// </summary>
         public UCSignalLamp()
         {
             this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
             this.SetStyle(ControlStyles.DoubleBuffer, true);
             this.SetStyle(ControlStyles.ResizeRedraw, true);
             this.SetStyle(ControlStyles.Selectable, true);
             this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
             this.SetStyle(ControlStyles.UserPaint, true);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
             this.Size = new Size(, );
             this.SizeChanged += UCSignalLamp_SizeChanged;
             timer = new Timer();
             timer.Interval = ;
             timer.Tick += timer_Tick;
         }

         /// <summary>
         /// Handles the Tick event of the timer control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
         void timer_Tick(object sender, EventArgs e)
         {
             intColorIndex++;
             if (intColorIndex >= lampColor.Length)
                 intColorIndex = ;
             Refresh();
         }
         /// <summary>
         /// Handles the SizeChanged event of the UCSignalLamp control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
         void UCSignalLamp_SizeChanged(object sender, EventArgs e)
         {
             var maxSize = Math.Min(this.Width, this.Height);
             if (this.Width != maxSize)
                 this.Width = maxSize;
             if (this.Height != maxSize)
                 this.Height = maxSize;
         }

         /// <summary>
         /// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
         /// </summary>
         /// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
         protected override void OnPaint(PaintEventArgs e)
         {
             base.OnPaint(e);
             var g = e.Graphics;
             g.SetGDIHigh();
             Color c1 = lampColor[intColorIndex];
             g.FillEllipse(new SolidBrush(c1), this.ClientRectangle);

             if (isHighlight)
             {
                 GraphicsPath gp = new GraphicsPath();

                 Rectangle rec = new Rectangle(, , this.Width - , this.Height - );
                 gp.AddEllipse(rec);

                 Color[] surroundColor = new Color[] { c1 };
                 PathGradientBrush pb = new PathGradientBrush(gp);
                 pb.CenterColor = Color.White;
                 pb.SurroundColors = surroundColor;
                 g.FillPath(pb, gp);
             }

             if (isShowBorder)
             {
                 g.DrawEllipse(new Pen(new SolidBrush(this.BackColor), ), new Rectangle(, , this.Width - , this.Height - ));
             }
         }
     }
 }

最后的话

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