242 lines
8.0 KiB
C#
242 lines
8.0 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) 2012-2025 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 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: UILedBulb.cs
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* 文件说明: LED灯
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* 文件作者: Steve Marsh
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* 开源协议: CPOL
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* 引用地址: https://www.codeproject.com/Articles/114122/A-Simple-Vector-Based-LED-User-Control
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******************************************************************************/
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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Windows.Forms;
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#pragma warning disable 1591
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namespace Sunny.UI
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{
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/// <summary>
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/// The LEDBulb is a .Net control for Windows Forms that emulates an
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/// LED light with two states On and Off. The purpose of the control is to
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/// provide a sleek looking representation of an LED light that is sizable,
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/// has a transparent background and can be set to different colors.
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/// </summary>
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[Description("LED灯控件")]
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public class UILedBulb : Control, IZoomScale
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{
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#region Public and Private Members
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private Color _color;
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private bool _on = true;
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private readonly Color _reflectionColor = Color.FromArgb(180, 255, 255, 255);
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private readonly Color[] _surroundColor = new Color[] { Color.FromArgb(0, 255, 255, 255) };
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private readonly Timer timer;
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/// <summary>
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/// 禁止控件跟随窗体缩放
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/// </summary>
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[DefaultValue(false), Category("SunnyUI"), Description("禁止控件跟随窗体缩放")]
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public bool ZoomScaleDisabled { get; set; }
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/// <summary>
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/// 控件缩放前在其容器里的位置
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/// </summary>
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[Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
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public Rectangle ZoomScaleRect { get; set; }
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/// <summary>
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/// 设置控件缩放比例
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/// </summary>
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/// <param name="scale">缩放比例</param>
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public void SetZoomScale(float scale)
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{
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}
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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timer?.Stop();
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timer?.Dispose();
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}
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/// <summary>
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/// Gets or Sets the color of the LED light
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/// </summary>
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[DefaultValue(typeof(Color), "192, 255, 192")]
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public Color Color
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{
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get { return _color; }
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set
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{
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_color = value;
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DarkColor = ControlPaint.Dark(_color);
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DarkDarkColor = ControlPaint.DarkDark(_color);
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Invalidate(); // Redraw the control
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}
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}
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/// <summary>
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/// Dark shade of the LED color used for gradient
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/// </summary>
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[Browsable(false)]
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public Color DarkColor { get; protected set; }
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/// <summary>
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/// Very dark shade of the LED color used for gradient
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/// </summary>
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[Browsable(false)]
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public Color DarkDarkColor { get; protected set; }
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/// <summary>
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/// Gets or Sets whether the light is turned on
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/// </summary>
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[DefaultValue(true)]
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public bool On
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{
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get { return _on; }
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set
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{
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_on = value;
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Invalidate();
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}
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}
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#endregion Public and Private Members
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#region Constructor
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public UILedBulb()
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{
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SetStyle(ControlStyles.DoubleBuffer
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| ControlStyles.AllPaintingInWmPaint
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| ControlStyles.ResizeRedraw
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| ControlStyles.UserPaint
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| ControlStyles.SupportsTransparentBackColor, true);
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Width = Height = 32;
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Color = Color.FromArgb(192, 255, 192);
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timer = new Timer();
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timer.Tick += (sender, e) => { On = !On; };
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}
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#endregion Constructor
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#region Methods
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/// <summary>
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/// 重载绘图
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/// </summary>
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/// <param name="e">绘图参数</param>
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protected override void OnPaint(PaintEventArgs e)
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{
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// Create an offscreen graphics object for double buffering
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using Bitmap offScreenBmp = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
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using var g = Graphics.FromImage(offScreenBmp);
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g.SetHighQuality();
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// Draw the control
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drawControl(g, On);
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// Draw the image to the screen
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e.Graphics.DrawImageUnscaled(offScreenBmp, 0, 0);
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}
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/// <summary>
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/// Renders the control to an image
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/// </summary>
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private void drawControl(Graphics g, bool on)
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{
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// Is the bulb on or off
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Color lightColor = (on) ? Color : Color.FromArgb(150, DarkColor);
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Color darkColor = (on) ? DarkColor : DarkDarkColor;
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// Calculate the dimensions of the bulb
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int width = Width - (Padding.Left + Padding.Right);
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int height = Height - (Padding.Top + Padding.Bottom);
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// Diameter is the lesser of width and height
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int diameter = Math.Min(width, height);
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// Subtract 1 pixel so ellipse doesn't get cut off
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diameter = Math.Max(diameter - 1, 1);
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// Draw the background ellipse
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var rectangle = new Rectangle(Padding.Left, Padding.Top, diameter, diameter);
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g.FillEllipse(darkColor, rectangle);
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// Draw the glow gradient
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using var path = new GraphicsPath();
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path.AddEllipse(rectangle);
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using var pathBrush = new PathGradientBrush(path);
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pathBrush.CenterColor = lightColor;
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pathBrush.SurroundColors = new[] { Color.FromArgb(0, lightColor) };
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g.SetHighQuality();
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g.FillEllipse(pathBrush, rectangle);
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// Draw the white reflection gradient
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var offset = Convert.ToInt32(diameter * .15F);
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var diameter1 = Convert.ToInt32(rectangle.Width * .8F);
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var whiteRect = new Rectangle(rectangle.X - offset, rectangle.Y - offset, diameter1, diameter1);
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using var path1 = new GraphicsPath();
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path1.AddEllipse(whiteRect);
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using var pathBrush1 = new PathGradientBrush(path);
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pathBrush1.CenterColor = _reflectionColor;
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pathBrush1.SurroundColors = _surroundColor;
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g.SetHighQuality();
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g.FillEllipse(pathBrush1, whiteRect);
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// Draw the border
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g.SetClip(ClientRectangle);
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g.SetHighQuality();
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if (On)
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{
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using Pen pn = new Pen(Color.FromArgb(85, Color.Black), 1F);
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g.DrawEllipse(pn, rectangle);
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}
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g.SetDefaultQuality();
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}
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private int blinkInterval = 1000;
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[DefaultValue(1000)]
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public int BlinkInterval
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{
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get => blinkInterval;
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set
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{
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blinkInterval = Math.Max(100, value);
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bool isBlink = Blink;
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if (isBlink) timer.Stop();
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timer.Interval = blinkInterval;
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timer.Enabled = isBlink;
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}
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}
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[DefaultValue(false)]
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public bool Blink
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{
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get => timer.Enabled;
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set
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{
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On = true;
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timer.Stop();
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timer.Interval = BlinkInterval;
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timer.Enabled = value;
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}
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}
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#endregion Methods
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}
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} |