133 lines
4.2 KiB
C#
133 lines
4.2 KiB
C#
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 CheckBoxExt : CheckBox
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{
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public CheckBoxExt()
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{
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InitializeComponent();
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_format.LineAlignment = StringAlignment.Center;
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_format.Alignment = StringAlignment.Center;
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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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}
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private StringFormat _format = new StringFormat();
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private int defultCheckButtonWidth = 20;
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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("设置或显示标题名称")]
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public int DefultCheckButtonWidth
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{
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get { return defultCheckButtonWidth; }
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set { defultCheckButtonWidth = value; }
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}
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private Color checkColor = Color.FromArgb(3, 25, 66);
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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("设置或显示选中颜色")]
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public Color CheckColor
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{
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get { return checkColor; }
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set
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{
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checkColor = value;
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this.Invalidate();
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}
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}
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private Color checkBackColor = Color.White;
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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("设置或显示选中框背景颜色")]
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public Color CheckBackColor
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{
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get { return checkBackColor; }
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set
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{
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checkBackColor = value;
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this.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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base.OnPaintBackground(e);
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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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Rectangle checkRec;
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Rectangle textRec;
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CalculatorRec(out checkRec, out textRec);
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SolidBrush solidBrush = new SolidBrush(CheckBackColor);
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g.FillRectangle(solidBrush, checkRec);
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Pen pen = new Pen(Color.LightGray);
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g.DrawRectangle(pen, checkRec);
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if (this.CheckState == CheckState.Checked)
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{
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//画勾选
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DrawCheckFlag(g, checkRec, checkColor);
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}
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//绘制文本
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g.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), textRec, this._format);
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}
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/// <summary>
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/// 计算矩形
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/// </summary>
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/// <param name="checkRec"></param>
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/// <param name="textRec"></param>
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private void CalculatorRec(out Rectangle checkRec, out Rectangle textRec)
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{
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checkRec = new Rectangle(3, (this.Height - defultCheckButtonWidth) / 2, defultCheckButtonWidth,
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defultCheckButtonWidth);
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textRec = new Rectangle(checkRec.Right + 3, 0, Width - checkRec.Right - 6, this.Height);
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}
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/// <summary>
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/// 画勾选
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/// </summary>
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/// <param name="g"></param>
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/// <param name="rectangle"></param>
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/// <param name="color"></param>
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private void DrawCheckFlag(Graphics g, Rectangle rectangle, Color color)
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{
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PointF[] pointFs = new PointF[3];
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pointFs[0] = new PointF(rectangle.X + rectangle.Width / 4.5f, rectangle.Y + rectangle.Height / 2.5f);
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pointFs[1] = new PointF(rectangle.X + rectangle.Width / 2.5F, rectangle.Bottom - rectangle.Height / 3.0f);
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pointFs[2] = new PointF(rectangle.Right - rectangle.Width / 4.0f, rectangle.Y + rectangle.Height / 4.5f);
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Pen pen = new Pen(color, 2.0f);
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g.DrawLines(pen, pointFs);
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}
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}
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}
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