Aotecar-CAN/CompressorXN_ControlLib/PanelEx.cs

using DevExpress.XtraEditors;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace CompressorXN_ControlLib
{
    public partial class PanelEx : PanelControl
    {
        public PanelEx()
        {
            InitializeComponent();

            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            this.SetStyle(ControlStyles.DoubleBuffer, true);
            this.SetStyle(ControlStyles.ResizeRedraw, true);
            this.SetStyle(ControlStyles.Selectable, true);
            this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
        }

        private int topGap = 1;
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示上边间隔距离")]
        public int TopGap
        {
            get { return topGap; }
            set
            {
                topGap = value;
                this.Invalidate();
            }
        }

        private int bottomGap = 1;
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示下边间隔距离")]
        public int BottomGap
        {
            get { return bottomGap; }
            set
            {
                bottomGap = value;
                this.Invalidate();
            }
        }

        private int leftGap = 1;
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示左边间隔距离")]
        public int LeftGap
        {
            get { return leftGap; }
            set
            {
                leftGap = value;
                this.Invalidate();
            }
        }

        private int rightGap = 1;
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示右边间隔距离")]
        public int RightGap
        {
            get { return rightGap; }
            set
            {
                rightGap = value;
                this.Invalidate();
            }
        }

        private int borderWidth = 2;
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示边框宽度")]
        public int BorderWidth
        {
            get { return borderWidth; }
            set
            {
                borderWidth = value;
                this.Invalidate();
            }
        }

        private Color borderColor = Color.FromArgb(35, 255, 253);
        [Browsable(true)]
        [Category("自定义属性")]
        [Description("设置或显示边框颜色")]
        public Color BorderColor
        {
            get { return borderColor; }
            set
            {
                borderColor = value;
                this.Invalidate();
            }
        }


        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Graphics graphics = e.Graphics;

            Pen pen = new Pen(borderColor,borderWidth);

            float x = leftGap + borderWidth * 0.5f;
            float y = TopGap + borderWidth * 0.5f;
            float width = this.Width - leftGap - rightGap - borderWidth;
            float height = this.Height - topGap - bottomGap - borderWidth;
            graphics.DrawRectangle(pen, x, y, width, height);
        }
    }
}