mes-client/UAS-MES/PublicMethod/GlobalEventsHandler.cs

using System.Windows.Forms;
using UAS_MES.CustomControl.ButtonUtil;
using UAS_MES.CustomControl.ClickPicBox;
using UAS_MES.CustomControl.TextBoxWithIcon;
using UAS_MES.Entity;

namespace UAS_MES.PublicMethod
{
    /// <summary>
    /// Author zhangz   2016/12/30
    /// 全局事件处理，通过句柄获取触发事件的控件
    /// 结合捕获的全局的键盘事件来验证用户进行的操作
    /// </summary>
    class GlobalEventsHandler : IMessageFilter
    {
        public static Keys keycode;
        //鼠标左键点击
        public const int WM_LBUTTONDOWN = 0x0201;
        //键盘敲击事件
        public const int WM_KEYDOWN = 0x100;

        private MessageBoxButtons messButton = MessageBoxButtons.OK;

        private MessageBoxIcon messIcon = MessageBoxIcon.Exclamation;

        string Type = "";
        string Type1 = "";

        public bool PreFilterMessage(ref Message m)
        {
            //通过句柄去获取具体触发事件的控件
            Control c = Control.FromHandle(m.HWnd);
            //可进行数据操作的控件需要进行权限的判断,结合WM_LBUTTONDOWN对按钮进行判断
            if (c != null && m.Msg == WM_LBUTTONDOWN && (c is NormalButton || c is DeleteButton || c is Button || c is ClickPicBox || c is SearchTextBox))
            {
                //获取控件的类型
                return CheckControlPower(c);
            }
            //集合WM_KEYDOWN对输入框进行判断
            else if (c != null && m.Msg == WM_KEYDOWN && (c is EnterTextBox || c is TextBox))
            {
                string ControlType = c.GetType().ToString();
                switch (ControlType.Substring(ControlType.LastIndexOf(".")))
                {
                    case "EnterTextBox": break;
                    default: break;
                }
                //在TextBox或者EnterBox中按下了回车键
                if (keycode == Keys.Return)
                {
                    keycode = Keys.None;
                    return CheckControlPower(c);
                }
                else
                    return false;
            }
            else
                return false;
        }

        /// <summary>
        /// 返回True表示消息已处理，不再往后传递
        /// 返回False表示消息未处理，后续程序处理此事件
        /// </summary>
        /// <param name="c"></param>
        /// <returns></returns>
        private bool CheckControlPower(Control c)
        {
            //弹出的小窗体不做校验
            if (c.FindForm().Tag.ToString() == "ShowDialogWindow")
                return false;
            //获取控件的类型
            string ControlType = c.GetType().ToString();
            switch (ControlType.Substring(ControlType.LastIndexOf(".") + 1))
            {
                case "NormalButton":
                    LogManager.DoLog(c.FindForm().Text + "窗体" + "点击按钮【" + c.Text + "】");
                    //判断是否拥有全部权限
                    if ((c as NormalButton).AllPower != null)
                    {
                        Type = "IFALL";
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                    }
                    if ((c as NormalButton).Power != null)
                    {
                        switch ((c as NormalButton).Power.ToString().ToUpper())
                        {
                            case "IFREAD":
                                Type = "IFREAD";
                                Type1 = "读取";
                                break;
                            case "IFWRITE":
                                Type = "IFWRITE";
                                Type1 = "修改";
                                break;
                            case "IFDELETE":
                                Type = "IFDELETE";
                                Type1 = "删除";
                                break;
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default:
                                break;
                        }
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                        else
                        {
                            MessageBox.Show("没有" + Type1 + "数据的权限", "提示", messButton, messIcon);
                            return true;
                        }
                    }
                    break;
                case "ClickPicBox":
                    if ((c as ClickPicBox).AllPower != null)
                    {
                        Type = "IFALL";
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                    }
                    if ((c as ClickPicBox).Power != null && (c as ClickPicBox).Power.ToString() != "")
                    {
                        LogManager.DoLog(c.FindForm().Text + "窗体" + "点击按钮【" + c.Text + "】");
                        switch ((c as ClickPicBox).Power.ToString().ToUpper())
                        {
                            case "IFREAD":
                                Type = "IFREAD";
                                Type1 = "读取";
                                break;
                            case "IFWRITE":
                                Type = "IFWRITE";
                                Type1 = "修改";
                                break;
                            case "IFDELETE":
                                Type = "IFDELETE";
                                Type1 = "删除";
                                break;
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default: break;
                        }
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                        else
                        {
                            MessageBox.Show("没有" + Type1 + "数据的权限", "提示", messButton, messIcon);
                            return true;
                        }
                    }
                    break;
                case "SearchTextBox":
                    if ((c as SearchTextBox).AllPower != null)
                    {
                        Type = "IFALL";
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                    }
                    if ((c as SearchTextBox).Power != null)
                    {
                        LogManager.DoLog(c.FindForm().Text + "窗体" + "输入框【" + c.Text + "】");
                        switch ((c as SearchTextBox).Power.ToString().ToUpper())
                        {
                            case "IFREAD":
                                Type = "IFREAD";
                                Type1 = "读取";
                                break;
                            case "IFWRITE":
                                Type = "IFWRITE";
                                Type1 = "修改";
                                break;
                            case "IFDELETE":
                                Type = "IFDELETE";
                                Type1 = "删除";
                                break;
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default: break;
                        }
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                        {
                            return false;
                        }
                        else
                        {
                            MessageBox.Show("没有" + Type1 + "数据的权限", "提示", messButton, messIcon);
                            return true;
                        }
                    }
                    break;
                case "DeleteButton":
                    if ((c as DeleteButton).AllPower != null)
                    {
                        Type = "IFALL";
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                    }
                    if ((c as DeleteButton).Power != null)
                    {
                        LogManager.DoLog(c.FindForm().Text + "窗体" + "点击按钮【" + c.Text + "】");
                        switch ((c as DeleteButton).Power.ToString().ToUpper())
                        {
                            case "IFREAD":
                                Type = "IFREAD";
                                Type1 = "读取";
                                break;
                            case "IFWRITE":
                                Type = "IFWRITE";
                                Type1 = "修改";
                                break;
                            case "IFDELETE":
                                Type = "IFDELETE";
                                Type1 = "删除";
                                break;
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default: break;
                        }
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                        else
                        {
                            MessageBox.Show("没有" + Type1 + "数据的权限", "提示", messButton, messIcon);
                            return true;
                        }
                    }
                    break;
                case "Button":
                    if (c.Tag != null)
                    {
                        LogManager.DoLog(c.FindForm().Text + "窗体" + "点击按钮【" + c.Text + "】");
                        switch (c.Tag.ToString().ToUpper())
                        {
                            case "IFREAD":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFREAD"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有读取数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFWRITE":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFWRITE"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有修改数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFDELETE":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFDELETE"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有删除数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default: break;
                        }
                    }
                    break;
                case "EnterTextBox":
                    if ((c as EnterTextBox).AllPower != null)
                    {
                        Type = "IFALL";
                        if (SystemInf.Caller[c.FindForm().Tag.ToString()][Type])
                            return false;
                    }
                    if ((c as EnterTextBox).Power != null)
                    {
                        LogManager.DoLog(c.FindForm().Text + "窗体" + "输入框【" + c.Text + "】");
                        switch ((c as EnterTextBox).Power.ToString().ToUpper())
                        {
                            case "IFREAD":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFREAD"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有读取数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFWRITE":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFWRITE"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有修改数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFDELETE":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFDELETE"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("没有删除数据的权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            case "IFSPECIAL":
                                if (SystemInf.Caller[c.FindForm().Tag.ToString()]["IFSPECIAL"])
                                    return false;
                                else
                                {
                                    MessageBox.Show("此操作需要特殊权限", "提示", messButton, messIcon);
                                    return true;
                                }
                            default: break;
                        }
                    }
                    break;
                default: break;
            }
            return false;
        }
    }
}