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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namespace WinCustControls
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{
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public partial class UInstrumentControl : UserControl
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{
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public UInstrumentControl()
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{
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InitializeComponent();
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);//忽略窗口消息，减少闪烁
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SetStyle(ControlStyles.OptimizedDoubleBuffer, true);//绘制到缓冲区，减少闪烁
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SetStyle(ControlStyles.UserPaint, true);//控件由其自身而不是操作系统绘制
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SetStyle(ControlStyles.ResizeRedraw, true);//控件调整其大小时重绘
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SetStyle(ControlStyles.SupportsTransparentBackColor, true);//支持透明背景
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this.SizeChanged += UInstrumentControl_SizeChanged;
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this.Size = new Size(300, 200);
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}
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Rectangle m_rectWorking;//绘制工作区
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private void UInstrumentControl_SizeChanged(object sender, EventArgs e)
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{
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m_rectWorking = new Rectangle(10, 10, Width - 20, Height - 20);
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}
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private int splitCount = 10;
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/// <summary>
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/// 刻度数量
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/// </summary>
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/// <value></value>
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[Description("分隔刻度数量，数量必须 >1"), Category("自定义")]
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public int SplitCount
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{
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get { return splitCount; }
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set
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{
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if (value < 1)
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return;
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splitCount = value;
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Invalidate();
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}
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}
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private int meterDegrees = 180;
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/// <summary>
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/// 跨度角度
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/// </summary>
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/// <value></value>
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[Description("表盘内跨度角度，0-360"), Category("自定义")]
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public int MeterDegrees
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{
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get { return meterDegrees; }
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set
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{
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if (value > 360 || value <= 0)
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return;
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meterDegrees = value;
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Invalidate();
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}
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}
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private decimal minValue = 0;
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/// <summary>
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/// 仪表的最小值
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/// </summary>
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[Description("最小值,必须比最大值小"), Category("自定义")]
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public decimal MinValue
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{
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get { return minValue; }
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set
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{
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if (value >= maxValue)
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return;
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minValue = value;
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Invalidate();
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}
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}
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private decimal maxValue = 100;
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/// <summary>
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///最大值
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/// </summary>
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[Description("仪表的最大值,必须比最小值大"), Category("自定义")]
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public decimal MaxValue
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{
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get { return maxValue; }
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set
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{
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if (value <= minValue)
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return;
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maxValue = value;
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Invalidate();
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}
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}
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[Description("刻度值的字体"), Category("自定义")]
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public override Font Font
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{
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get
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{
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return base.Font;
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}
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set
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{
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base.Font = value;
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Invalidate();
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}
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}
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private decimal m_value = 0;
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/// <summary>
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/// 仪表值
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/// </summary>
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[Description("仪表实际值，最大值与最小值之间的值"), Category("自定义")]
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public decimal Value
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{
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get { return m_value; }
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set
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{
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if (value < minValue || value > maxValue)
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return;
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m_value = value;
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Invalidate();
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}
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}
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private TextLocation textLocation = TextLocation.None;
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/// <summary>
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/// 文字位置
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/// </summary>
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[Description("值和固定文字显示位置"), Category("自定义")]
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public TextLocation TextLocation
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{
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get { return textLocation; }
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set
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{
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textLocation = value;
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Invalidate();
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}
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}
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private string fixedText;
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/// <summary>
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///固定文字
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/// </summary>
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[Description("固定文字"), Category("自定义")]
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public string FixedText
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{
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get { return fixedText; }
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set
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{
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fixedText = value;
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Invalidate();
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}
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}
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private Font textFont = DefaultFont;
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/// <summary>
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/// 固定文字字体
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/// </summary>
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[Description("值和固定文字字体"), Category("自定义")]
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public Font TextFont
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{
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get { return textFont; }
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set
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{
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textFont = value;
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Invalidate();
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}
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}
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private Color textColor = Color.Red;
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/// <summary>
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/// 值和固定文字颜色
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/// </summary>
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[Description("值和固定文字颜色"), Category("自定义")]
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public Color TextColor
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{
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get { return textColor; }
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set
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{
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textColor = value;
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Invalidate();
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}
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}
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private Color externalRoundColor = Color.Red;
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/// <summary>
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/// 外边圆线的颜色
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/// </summary>
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[Description("外圆线颜色"), Category("自定义")]
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public Color ExternalRoundColor
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{
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get { return externalRoundColor; }
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set
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{
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externalRoundColor = value;
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Invalidate();
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}
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}
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private Color insideRoundColor = Color.Gray;
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/// <summary>
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///内圆线颜色
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/// </summary>
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/// <value></value>
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[Description("内圆线颜色"), Category("自定义")]
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public Color InsideRoundColor
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{
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get { return insideRoundColor; }
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set
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{
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insideRoundColor = value;
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Invalidate();
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}
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}
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private Color boundaryLineColor = Color.Red;
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/// <summary>
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/// 边界线颜色
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/// </summary>
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[Description("边界线颜色"), Category("自定义")]
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public Color BoundaryLineColor
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{
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get { return boundaryLineColor; }
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set
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{
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boundaryLineColor = value;
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Invalidate();
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}
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}
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private Color scaleColor = Color.Gray;
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/// <summary>
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/// 刻度线颜色
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/// </summary>
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[Description("刻度线颜色"), Category("自定义")]
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public Color ScaleColor
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{
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get { return scaleColor; }
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set
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{
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scaleColor = value;
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Invalidate();
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}
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}
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private Color scaleValueColor = Color.Red;
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/// <summary>
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/// 刻度值文字颜色
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/// </summary>
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[Description("刻度值文字颜色"), Category("自定义")]
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public Color ScaleValueColor
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{
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get { return scaleValueColor; }
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set
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{
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scaleValueColor = value;
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Invalidate();
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}
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}
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private Color pointerColor = Color.FromArgb(255, 77, 59);
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/// <summary>
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/// 指针颜色
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/// </summary>
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[Description("指针颜色"), Category("自定义")]
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public Color PointerColor
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{
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get { return pointerColor; }
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set
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{
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pointerColor = value;
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Invalidate();
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}
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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Graphics g = e.Graphics;
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g.SmoothingMode = SmoothingMode.HighQuality;
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//外圆 -90-75+360=195
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float fltStartAngle = -90 - (meterDegrees) / 2 + 360;//开始角度
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//绘制外圆弧的矩形区域
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var r1 = new Rectangle(m_rectWorking.Location, new Size(m_rectWorking.Width, m_rectWorking.Width));
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//画外圆弧
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g.DrawArc(new Pen(new SolidBrush(externalRoundColor), 3), r1, fltStartAngle, meterDegrees);
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//内圆矩形区域
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var r2 = new Rectangle(m_rectWorking.Left + (m_rectWorking.Width - m_rectWorking.Width / 4) / 2, m_rectWorking.Top + (m_rectWorking.Width - m_rectWorking.Width / 4) / 2, m_rectWorking.Width / 4, m_rectWorking.Width / 4);
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//画内圆弧
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g.DrawArc(new Pen(new SolidBrush(insideRoundColor), 2), r2, fltStartAngle, meterDegrees);
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//边界线
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if (meterDegrees != 360)
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{
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float fltAngle = fltStartAngle - 180;
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//左上的点坐标
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float intY = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - m_rectWorking.Width / 8) * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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float intX = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - m_rectWorking.Width / 8) * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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//左下的点坐标
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float fltY1 = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - (m_rectWorking.Width / 8 * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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float fltX1 = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - (m_rectWorking.Width / 8 * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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//画左边界线
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g.DrawLine(new Pen(new SolidBrush(boundaryLineColor), 2), new PointF(intX, intY), new PointF(fltX1, fltY1));
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//右边两点的x坐标
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float fltx2 = m_rectWorking.Right - (fltX1 - m_rectWorking.Left);
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float intX2 = m_rectWorking.Right - (intX - m_rectWorking.Left);
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//画右边界线
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g.DrawLine(new Pen(new SolidBrush(boundaryLineColor), 2), new PointF(fltx2, fltY1), new PointF(intX2, intY));
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}
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//分割份数
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int _splitCount = splitCount * 2;
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//每份的角度
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float fltSplitValue = (float)meterDegrees / (float)_splitCount;
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for (int i = 0; i <= _splitCount; i++)
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{
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//刻度的起始角度
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float fltAngle = (fltStartAngle + fltSplitValue * i - 180) % 360;
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//刻度线的起点坐标
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float fltY1 = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2) * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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float fltX1 = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2) * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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//结束点坐标
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float fltY2 = 0;
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float fltX2 = 0;
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if (i % 2 == 0)//长刻度
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{
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fltY2 = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 10) * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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fltX2 = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 10) * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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if (!(meterDegrees == 360 && i == _splitCount))
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{
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//长刻度线的文本
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decimal decValue = minValue + (maxValue - minValue) / _splitCount * i;
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var txtSize = g.MeasureString(decValue.ToString("0.##"), this.Font);
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//刻度值文本左上角坐标
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float fltFY1 = (float)(m_rectWorking.Top - txtSize.Height / 2 + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 20) * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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float fltFX1 = (float)(m_rectWorking.Left - txtSize.Width / 2 + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 20) * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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//画刻度文本
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g.DrawString(decValue.ToString("0.##"), Font, new SolidBrush(scaleValueColor), fltFX1, fltFY1);
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}
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}
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else//短刻度
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{
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fltY2 = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 5) * Math.Sin(Math.PI * (fltAngle / 180.00F))));
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fltX2 = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 5) * Math.Cos(Math.PI * (fltAngle / 180.00F)))));
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}
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//画刻度线
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g.DrawLine(new Pen(new SolidBrush(scaleColor), i % 2 == 0 ? 2 : 1), new PointF(fltX1, fltY1), new PointF(fltX2, fltY2));
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}
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//值文字和固定文字
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if (textLocation == TextLocation.Top)
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{
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//值文本格式化
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string str = m_value.ToString("0.##");
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var txtSize = g.MeasureString(str, textFont);
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//值文本的左上角坐标
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float fltY = m_rectWorking.Top + m_rectWorking.Width / 4 - txtSize.Height / 2;
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float fltX = m_rectWorking.Left + m_rectWorking.Width / 2 - txtSize.Width / 2;
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//画当前值
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g.DrawString(str, textFont, new SolidBrush(textColor), new PointF(fltX, fltY));
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//如果固定文本有设置
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if (!string.IsNullOrEmpty(fixedText))
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{
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//固定文本
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str = fixedText;
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txtSize = g.MeasureString(str, textFont);
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//固定文本的左上角坐标
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fltY = m_rectWorking.Top + m_rectWorking.Width / 4 + txtSize.Height / 2;
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fltX = m_rectWorking.Left + m_rectWorking.Width / 2 - txtSize.Width / 2;
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//画固定文本
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g.DrawString(str, textFont, new SolidBrush(textColor), new PointF(fltX, fltY));
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}
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}
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//画指针中心外圆 半径10
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g.FillEllipse(new SolidBrush(Color.FromArgb(100, pointerColor.R, pointerColor.G, pointerColor.B)), new Rectangle(m_rectWorking.Left + m_rectWorking.Width / 2 - 10, m_rectWorking.Top + m_rectWorking.Width / 2 - 10, 20, 20));
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//画指针中心内圆 半径5
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g.FillEllipse(Brushes.Red, new Rectangle(m_rectWorking.Left + m_rectWorking.Width / 2 - 5, m_rectWorking.Top + m_rectWorking.Width / 2 - 5, 10, 10));
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//值的角色
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float fltValueAngle = (fltStartAngle + ((float)(m_value - minValue) / (float)(maxValue - minValue)) * (float)meterDegrees - 180) % 360;
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//值对应指向点坐标
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float intValueY1 = (float)(m_rectWorking.Top + m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 30) * Math.Sin(Math.PI * (fltValueAngle / 180.00F))));
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float intValueX1 = (float)(m_rectWorking.Left + (m_rectWorking.Width / 2 - ((m_rectWorking.Width / 2 - 30) * Math.Cos(Math.PI * (fltValueAngle / 180.00F)))));
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//画指针线
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g.DrawLine(new Pen(new SolidBrush(pointerColor), 3), intValueX1, intValueY1, m_rectWorking.Left + m_rectWorking.Width / 2, m_rectWorking.Top + m_rectWorking.Width / 2);
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}
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}
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/// <summary>
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/// 值和固定文本是否显示
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/// </summary>
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public enum TextLocation
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{
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None,
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Top
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}
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}
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