using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace POSV
{
    public partial class TransparentFormExt : BaseForm
    {
        /// <summary>
        /// 当前业务处理窗口
        /// </summary>
        private BusinessForm form;

        /// <summary>
        /// 遮罩层窗体
        /// <param name="point">当前位置</param>
        /// <param name="size">窗体大小</param>
        /// <param name="form">窗体</param>
        public TransparentFormExt(Control overlay , BusinessForm form) : this(overlay , Constant.Opacity , form)
        {

        }

        public TransparentFormExt(Control overlay , double opacity , BusinessForm form)
        {
            InitializeComponent();

            this.Name = "TransparentFormExt";

            //无边框
            this.FormBorderStyle = FormBorderStyle.None;
            //透明度
            this.Opacity = opacity;
            //最大化/最小化
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.ShowIcon = false;
            this.ShowInTaskbar = false;
            //窗口位置和大小
            this.StartPosition = FormStartPosition.Manual;

            Rectangle rect = new Rectangle(overlay.PointToScreen(Point.Empty) , overlay.Size);

            this.Location = new Point(rect.X , rect.Y);
            this.Size = new Size(rect.Width , rect.Height);

            //当前窗体
            this.form = form;
        }
        
        private bool isShow = false;

        protected override void OnActivated(EventArgs e)
        {
            try
            {
                base.OnActivated(e);

                if (isShow) return;

                //工作窗体最大化、最小化
                this.form.MaximizeBox = false;
                this.form.MinimizeBox = false;
                this.form.ShowIcon = false;
                this.form.ShowInTaskbar = false;

                //DockStyle
                this.form.Dock = DockStyle.Fill;
                this.form.Owner = this;

                //工作窗体显示
                this.form.Show(this);

                this.form.BringToFront();
                this.form.Activate();
                this.form.Focus();

                this.isShow = true;
            }
            catch(Exception ex)
            {
                LOGGER.Error(ex , "OnActivated异常");

            }
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);

            if (this.form != null)
            {
                this.form.BringToFront();
                this.form.Activate();
                this.form.Focus();
            }
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            if (this.Owner != null)
            {
                this.Owner.Activate();
            }

            isShow = false;

            this.Visible = false;

            e.Cancel = true;
        }
    }
}