添加项目文件。
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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 JinYuan.ControlLib
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{
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public partial class CircleProgramBar : Control
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{
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public CircleProgramBar()
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{
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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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InitControl();
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this.SizeChanged += delegate
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{
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this.Invalidate(); //重绘控件
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};
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}
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#region 减少闪烁
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protected override CreateParams CreateParams
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{
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get
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{
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CreateParams cp = base.CreateParams;
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cp.ExStyle |= 0x02000000;
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return cp;
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}
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}
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#endregion
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/// <summary>
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/// 初始化控件参数
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/// </summary>
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private void InitControl()
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{
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this.Width = 200;
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this.Height = 200;
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}
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private Color bgColor = Color.FromArgb(224, 224, 224);
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示背景边框颜色")]
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public Color BgColor
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{
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get { return this.bgColor; }
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set
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{
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this.bgColor = value;
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this.Invalidate();
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}
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}
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private Color sectorColor = Color.FromArgb(109, 179, 63);
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示扇形颜色")]
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public Color SectorColor
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{
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get { return this.sectorColor; }
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set
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{
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this.sectorColor = value;
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this.Invalidate();
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}
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}
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private int borderWidth = 5;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示边框宽度")]
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public int BorderWidth
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{
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get { return this.borderWidth; }
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set
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{
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this.borderWidth = value;
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this.Invalidate();
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}
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}
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private int maxValue = 100;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示进度最大值")]
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public int MaxValue
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{
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get { return this.maxValue; }
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set
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{
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this.maxValue = value;
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this.Invalidate();
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}
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}
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private bool isShowDataType = false;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置显示数值是小数还是整数")]
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public bool IsShowDataType
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{
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get { return this.isShowDataType; }
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set
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{
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this.isShowDataType = value;
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this.Invalidate();
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}
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}
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private int intValue = 0;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示整数进度值")]
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public int IntValue
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{
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get { return this.intValue; }
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set
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{
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if (value > this.maxValue)
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{
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return;
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}
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this.intValue = value;
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this.Invalidate();
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}
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}
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private int floatValue = 0;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示小数进度值")]
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public int FloatValue
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{
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get { return this.floatValue; }
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set
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{
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if (value > this.maxValue)
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{
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return;
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}
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this.floatValue = value;
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this.Invalidate();
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}
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}
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private bool setShowsign = false;
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[Browsable(true)]//是否可见
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[Category("自定义属性")] //类别
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[Description("设置或显示百分号，显示百分号需要设置MaxValue值为100")]
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public bool SetShowsign
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{
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get { return this.setShowsign; }
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set
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{
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if (this.maxValue > 100)
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{
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this.maxValue = 100;
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}
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this.setShowsign = value;
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this.Invalidate();
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}
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}
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//对Control进行绘制
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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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if (this.Width < borderWidth * 4 || this.Height < borderWidth * 4)
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{
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return;
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}
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var g = e.Graphics;
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g.SmoothingMode = SmoothingMode.AntiAlias;//消除锯齿，也就是抗锯齿什么鬼东西
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g.InterpolationMode = InterpolationMode.HighQualityBicubic;
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g.CompositingQuality = CompositingQuality.HighQuality;
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RectangleF bg_rectangle = new RectangleF(0 + borderWidth, 0 + borderWidth, Width - borderWidth * 2, Height - borderWidth * 2); //控件整体坐标
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g.DrawEllipse(new Pen(bgColor, borderWidth), bg_rectangle); //画背景圆
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Rectangle rl = new Rectangle(0 + borderWidth * 2, 0 + borderWidth * 2, this.Width - borderWidth * 4, this.Height - borderWidth * 4);
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decimal topAngle = (isShowDataType ? this.floatValue : this.intValue * 1.0M / this.maxValue) * 360M;//计算进度条划过的度数
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g.FillPie(new SolidBrush(sectorColor), rl, 0, (float)topAngle); //填充扇形
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if (this.setShowsign)
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{
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SizeF proValSize = g.MeasureString(isShowDataType ? this.floatValue.ToString() : this.intValue.ToString() + "%", this.Font);//计算文字的范围
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g.DrawString(isShowDataType ? this.floatValue.ToString() : this.intValue.ToString() + "%", this.Font, new SolidBrush(this.ForeColor),
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bg_rectangle.X + bg_rectangle.Width / 2 - proValSize.Width / 2, bg_rectangle.Y + bg_rectangle.Height / 2 - proValSize.Height / 2);
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}
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else
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{
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SizeF proValSize = g.MeasureString(isShowDataType ? this.floatValue.ToString() : this.intValue.ToString(), this.Font);//计算文字的范围
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g.DrawString(isShowDataType ? this.floatValue.ToString() : this.intValue.ToString(), this.Font, new SolidBrush(this.ForeColor),
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bg_rectangle.X + bg_rectangle.Width / 2 - proValSize.Width / 2, bg_rectangle.Y + bg_rectangle.Height / 2 - proValSize.Height / 2);
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}
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}
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}
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}
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