添加项目文件。
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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.Windows.Forms;
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namespace JinYuan.ControlLib
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{
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public partial class DialPlate : UserControl
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{
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public DialPlate()
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{
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InitializeComponent();
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//设置控件样式，去除缓冲
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this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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this.SetStyle(ControlStyles.DoubleBuffer, true);
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this.SetStyle(ControlStyles.ResizeRedraw, true);
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this.SetStyle(ControlStyles.Selectable, true);
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this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
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stringFormat.Alignment = StringAlignment.Center;
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stringFormat.LineAlignment = StringAlignment.Center;
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}
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private StringFormat stringFormat = new StringFormat();
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#region 外环设计
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private Color alarmColor = Color.FromArgb(36, 184, 196);
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取报警颜色")]
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public Color AlarmColor
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{
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get { return alarmColor; }
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set
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{
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alarmColor = value;
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this.Invalidate();
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}
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}
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private Color rightColor = Color.FromArgb(187, 187, 187);
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取圆环整体颜色")]
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public Color RightColor
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{
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get { return rightColor; }
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set
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{
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rightColor = value;
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this.Invalidate();
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}
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}
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private float alarmAngle = 120.0f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取报警角度")]
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public float AlarmAngle
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{
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get { return alarmAngle; }
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set
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{
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alarmAngle = value;
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this.Invalidate();
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}
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}
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private int outThickness = 8;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取外环宽度")]
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public int OutThickness
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{
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get { return outThickness; }
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set
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{
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outThickness = value;
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this.Invalidate();
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}
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}
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#endregion
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#region 内环设计
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private float tempScale = 0.8f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取温度环比列，默认小于1.0f")]
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public float TempScale
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{
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get { return tempScale; }
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set
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{
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if (value > 1.0f) return;
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tempScale = value;
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this.Invalidate();
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}
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}
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private Color tempColor = Color.FromArgb(36, 184, 196);
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取温度环颜色")]
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public Color TempColor
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{
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get { return tempColor; }
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set
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{
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tempColor = value;
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this.Invalidate();
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}
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}
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private float humidityScale = 0.4f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取湿度环比列，默认小于1.0f")]
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public float HumidityScale
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{
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get { return humidityScale; }
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set
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{
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if (value > 1.0f) return;
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humidityScale = value;
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this.Invalidate();
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}
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}
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private Color humidityColor = Color.FromArgb(36, 184, 196);
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取湿度环颜色")]
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public Color HumidityColor
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{
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get { return humidityColor; }
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set
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{
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humidityColor = value;
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this.Invalidate();
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}
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}
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private int inThickness = 16;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取内环宽度")]
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public int InThickness
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{
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get { return inThickness; }
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set
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{
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inThickness = value;
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this.Invalidate();
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}
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}
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#endregion
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#region 刻度环设计
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private float textScale = 0.6f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取刻度环比列，默认小于1.0f")]
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public float MyProperty
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{
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get { return textScale; }
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set
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{
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if (value > 1.0f) return;
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textScale = value;
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this.Invalidate();
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}
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}
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private float rangeMin = 0.0f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取刻度量程低限")]
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public float RangeMin
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{
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get { return rangeMin; }
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set
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{
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if (value > rangeMax) return;
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rangeMin = value;
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this.Invalidate();
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}
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}
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private float rangeMax = 90.0f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取刻度量程高限")]
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public float RangeMax
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{
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get { return rangeMax; }
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set
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{
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if (value < rangeMin) return;
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rangeMax = value;
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this.Invalidate();
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}
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}
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#endregion
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#region 实时显示
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private float temp = 10.0f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取温度实时值")]
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public float Temp
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{
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get { return temp; }
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set
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{
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if (value < rangeMin)
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value = rangeMin;
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if (value > rangeMax)
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value = rangeMax;
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temp = value;
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this.Invalidate();
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}
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}
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private float humidity = 10.0f;
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[Browsable(true)]
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[Category("自定义属性")]
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[Description("设置或获取湿度实时值")]
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public float Humidity
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{
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get { return humidity; }
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set
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{
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if (value < rangeMin)
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value = rangeMin;
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if (value > rangeMax)
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value = rangeMax;
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humidity = value;
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this.Invalidate();
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}
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}
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#endregion
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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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//获取画布并设置
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Graphics g = e.Graphics;
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
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g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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//异常情况处理
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if (this.Width <= 20 || this.Height <= 20) return;
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if (this.Height < this.Width / 2) return;
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//画外环
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Pen pen = new Pen(alarmColor, OutThickness);
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g.DrawArc(pen, new RectangleF(10, 10, this.Width - 20, this.Width - 20), 180, alarmAngle);
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pen = new Pen(rightColor, OutThickness);
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g.DrawArc(pen, new RectangleF(10, 10, this.Width - 20, this.Width - 20), 180 + alarmAngle, 180 - alarmAngle);
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//转移坐标系
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g.TranslateTransform(this.Width * 0.5f, this.Width * 0.5f);
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//旋转坐标系
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g.RotateTransform(-90);
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SolidBrush solidBrush;
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for (int i = 0; i < 7; i++)
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{
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if (30 * i <= alarmAngle)
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{
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solidBrush = new SolidBrush(alarmColor);
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}
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else
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{
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solidBrush = new SolidBrush(rightColor);
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}
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float x = -0.3f;
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float width = 6.0f;
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float height = outThickness + 4;
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float y = (this.Width * 0.5f - 10 + height * 0.5f) * (-1.0f);
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g.FillRectangle(solidBrush, new RectangleF(x, y, width, height));
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g.RotateTransform(30);
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}
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//坐标系旋转回去
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g.RotateTransform(-210);
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g.RotateTransform(90);
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////绘制刻度
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float rangeAvg = ((rangeMax - rangeMin) % 6 == 0) ? Convert.ToSingle((rangeMax - rangeMin) / 6) : Convert.ToSingle(((rangeMax - rangeMin) / 6).ToString("f1"));
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for (int i = 0; i < 7; i++)
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{
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float angle = -180.0f + i * 30.0f;
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float pointX = Convert.ToSingle(this.Width * textScale * 0.5f * Math.Cos(angle * Math.PI / 180.0f));
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float pointY = Convert.ToSingle(this.Width * textScale * 0.5f * Math.Sin(angle * Math.PI / 180.0f));
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string text = (rangeMin + rangeAvg * i).ToString();
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SizeF size = g.MeasureString(text, this.Font);
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RectangleF rectangle = new RectangleF(pointX - size.Width * 0.5f, pointY, size.Width, size.Height);
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g.DrawString(text, this.Font, new SolidBrush(this.ForeColor), rectangle, stringFormat);
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}
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////绘制实际温度湿度环
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//pen = new Pen(tempColor, inThickness);
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//float sweepAngle = (temp - rangeMin) / (rangeMax - rangeMin) * 180.0f;
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//float xx = this.Width * tempScale * 0.5f * (-1.0f);
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//float yy = this.Width * tempScale * 0.5f * (-1.0f);
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//g.DrawArc(pen, new RectangleF(xx, yy, this.Width * tempScale, this.Width * tempScale), 180.0f, sweepAngle);
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//pen = new Pen(humidityColor, inThickness);
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//sweepAngle = (humidity - rangeMin) / (rangeMax - rangeMin) * 180.0f;
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//xx = this.Width * humidityScale * 0.5f * (-1.0f);
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//yy = this.Width * humidityScale * 0.5f * (-1.0f);
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//g.DrawArc(pen, new RectangleF(xx, yy, this.Width * humidityScale, this.Width * humidityScale), 180.0f, sweepAngle);
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}
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}
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}
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