SIMDP_FEM02/ProjectBase.Controls/PanelEnhanced.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using System.Drawing.Drawing2D;

namespace ProjectBase.Controls
{
    public partial class PanelEnhanced : DevExpress.XtraEditors.XtraUserControl
    {
        private Color _borderColor;
        private int _borderWidth = 1;
        private DashStyle _borderStyle = DashStyle.Solid;
        private int _opacity = 125;

        public PanelEnhanced()
        {
            InitializeComponent();
        }

        #region Property
        [Category("Custom"), Description("Border Color")]
        public Color BorderColor
        {
            set { _borderColor = value; }
            get { return _borderColor; }
        }

        [Category("Custom"), Description("Border Width"), DefaultValue(1)]
        public int BorderWidth
        {
            set
            {
                if (value < 0) value = 0;
                _borderWidth = value;
            }
            get { return _borderWidth; }
        }

        [Category("Custom"), Description("Border Style"), DefaultValue(DashStyle.Solid)]
        public new DashStyle BorderStyle
        {
            set { this._borderStyle = value; this.Invalidate(); }
            get { return this._borderStyle; }
        }

        [Bindable(true), Category("Custom"), DefaultValue(125), Description("背景的透明度. 有效值0-255")]
        public int Opacity
        {
            get { return _opacity; }
            set
            {
                if (value > 255) value = 255;
                else if (value < 0) value = 0;
                _opacity = value;
                this.Invalidate();
            }
        }
        #endregion

        protected override void OnPaintBackground(PaintEventArgs e)
        {
            //base.OnPaintBackground(e);
            return;
        }

        protected override void OnPaint(PaintEventArgs e)
        {

            //使用双缓冲
            this.DoubleBuffered = true;
            //背景重绘移动至此
            if (this.BackgroundImage != null)
            {
                e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                e.Graphics.DrawImage(this.BackgroundImage, new System.Drawing.Rectangle(0, 0, this.Width, this.Height), 0, 0,
                                     this.BackgroundImage.Width, this.BackgroundImage.Height, System.Drawing.GraphicsUnit.Pixel);
            }
            if (this._opacity > 0)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(this._opacity, this.BackColor)),
                                         this.ClientRectangle);
            }
            if (this._borderWidth > 0)
            {
                Pen pen = new Pen(this._borderColor, this._borderWidth);
                pen.DashStyle = this._borderStyle;
                e.Graphics.DrawRectangle(pen, e.ClipRectangle.Left, e.ClipRectangle.Top, this.Width - 1, this.Height - 1);
                pen.Dispose();
            }
            base.OnPaint(e);
        }
    }
}