lj_plc/Controls/Mesnac.Controls.ChemicalWeighing/AlarmLightNew.cs

using System;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Windows.Forms;

namespace Mesnac.Controls.ChemicalWeighing
{
    /// <summary>
    /// 报警灯
    /// </summary>
    [ToolboxBitmap(typeof(AlarmLightNew), "Resources.AlarmLightNewGray.png")]//新添加的代码
    public partial class AlarmLightNew : ChemicalWeighingControl
    {
        bool bNewPic = false;
        string _statusName;

        public string StatusName
        {
            get
            {
                return _statusName;
            }
            set
            {
                _statusName = value;
            }
        }
        public enum Statuses
        {
            ylNormal = 0, ylMove = 1, ylAlarm = 2
        }
        Statuses _status;
        string[] sImages;
        public AlarmLightNew()
            : base()
        {
            InitializeComponent();
            Init();
            ReloadStream();
        }

        protected override void Init()
        {
            base.Init();
            _imageStream = null;

            sImages = new string[3];
            sImages[0] = "Mesnac.Controls.ChemicalWeighing.Resources.AlarmLightNewGray.png";//
            sImages[1] = "Mesnac.Controls.ChemicalWeighing.Resources.AlarmLightNewRed.gif";//
            sImages[2] = "Mesnac.Controls.ChemicalWeighing.Resources.AlarmLightNewGreen.gif";//

            _status = Statuses.ylNormal;
        }

        private void ReloadStream()
        {
            //CloseStream();
            int nIndex = (int)_status;
            _imageStream = _assembly.GetManifestResourceStream(sImages[nIndex]);
        }

        public Statuses Status
        {
            get
            {
                return _status;
            }
            set
            {
                if (bFirstCreated == true)
                {
                    bFirstCreated = false;
                }

                if ( _status != value )
                {
                    if (this.DesignMode == true)
                    {
                        bNewPic = true;
                    }
                }
                if ( (int)value < 0 )
                {
                    _status = (Statuses)0;
                }
                else if ( (int)value > 2 )
                {
                    _status = (Statuses)2;
                }
                else
                {
                    _status = value;
                }
                ReloadStream();
                Reload();
            }
        }
        private void Reload()
        {
            if ( _imageStream != null )
            {
                Image img = Image.FromStream( _imageStream );
                if ( bNewPic == true )
                {
                    //this.Size = img.Size;
                    bNewPic = false;
                }
                pictureBox1.Image = img;
                pictureBox1.Refresh();
            }
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            if (_imageStream != null)
            {
                Graphics g = e.Graphics;
                Image img = Image.FromStream(_imageStream);
                if (bNewPic == true)
                {
                    //this.Size = img.Size;
                    bNewPic = false;
                }
                g.DrawImage(img, 0, 0, this.Width, this.Height);
            }
        }

        private void PressureSwitch_Load(object sender, EventArgs e)
        {
            if (bFirstCreated == true && this.DesignMode == true)
            {
                bNewPic = true;
                bFirstCreated = false;
                Reload();
            }
        }
    }
}