using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Mesnac.Docking;
using Mesnac.Core.Service;
using Mesnac.PlugIn.Pad;

namespace Mesnac.Gui.Workbench
{
    /// <summary>
    /// 面板封装类
    /// </summary>
    public partial class PadContentWrapper : DockContent
    {
        #region 定义变量

        private PadDescriptor _padDescriptor;
        private bool _isInitialized = false;
        internal bool _allowInitialize = true;

        #endregion

        #region 构造方法

        public PadContentWrapper(PadDescriptor padDescriptor)
        {
            InitializeComponent();
            if (padDescriptor == null)
            {
                MesnacServiceManager.Instance.LoggingService.Error("空面板...");
                throw new ArgumentNullException("padDescriptor");
            }
            this._padDescriptor = padDescriptor;

            this.InitPadPosition();      //初始化面板位置
            this.ActivateContent(); //激活并加载面板中的内容
        }
        

        #endregion

        #region 定义属性
        /// <summary>
        /// 获取IPadContent接口对象
        /// </summary>
        public IPadContent PadContent
        {
            get
            {
                if (this._padDescriptor != null)
                {
                    return this._padDescriptor.PadContent;
                }
                else
                    return null;
            }
        }

        #endregion

        #region 定义方法
        /// <summary>
        /// 分离面板内容
        /// </summary>
        public void DetachContent()
        {
            this.Controls.Clear();
            this._padDescriptor = null;
        }
        /// <summary>
        /// 激活面板，这个方法会把IPadContent中的控件加载到当前DockContent中，是显示面板内容的关键方法
        /// </summary>
        public void ActivateContent()
        {
            if (!this._allowInitialize)
                return;
            if (!this._isInitialized)
            {
                this._isInitialized = true;
                IPadContent content = this._padDescriptor.PadContent;
                if (content == null)
                {
                    return;
                }
                Form frm = content.Control as Form;
                if (frm != null)
                {
                    frm.TopLevel = false;
                    frm.ControlBox = false;
                    frm.FormBorderStyle = FormBorderStyle.None;
                    frm.Dock = DockStyle.Fill;
                    frm.Visible = true;
                    frm.AutoScroll = true;
                    this.Controls.Add(frm);
                }
                else
                {
                    content.Control.Dock = DockStyle.Fill;
                    this.Controls.Add(content.Control);
                }
            }
        }
        /// <summary>
        /// 允许初始化面板
        /// </summary>
        public void AllowInitialize()
        {
            this._allowInitialize = true;
            if (this.Visible && this.Width > 0)
            {
                this.ActivateContent();
            }
        }

        /// <summary>
        /// 初始化面板位置
        /// </summary>
        private void InitPadPosition()
        {
            switch (this._padDescriptor.DockState.ToLower())
            {
                case "":
                case "unknown":
                    this.ShowHint = DockState.Unknown;
                    break;
                case "dockleft":
                    this.ShowHint = DockState.DockLeft;
                    break;
                case "dockright":
                    this.ShowHint = DockState.DockRight;
                    break;
                case "docktop":
                    this.ShowHint = DockState.DockTop;
                    break;
                case "dockbottom":
                    this.ShowHint = DockState.DockBottom;
                    break;
                case "document":
                    this.ShowHint = DockState.Document;
                    break;
                case "float":
                    this.ShowHint = DockState.Float;
                    break;
                case "hidden":
                    this.ShowHint = DockState.Hidden;
                    break;
                case "dockleftautohide":
                    this.ShowHint = DockState.DockLeftAutoHide;
                    break;
                case "dockrightautohide":
                    this.ShowHint = DockState.DockRightAutoHide;
                    break;
                case "docktopautohide":
                    this.ShowHint = DockState.DockTopAutoHide;
                    break;
                case "dockbottomautohide":
                    this.ShowHint = DockState.DockBottomAutoHide;
                    break;
                default:
                    this.ShowHint = DockState.Unknown;
                    break;
            }
        }

        #endregion


        #region 事件处理程序覆盖

        /// <summary>
        /// 面板可视属性发生变化时的处理
        /// </summary>
        /// <param name="e"></param>
        protected override void OnVisibleChanged(EventArgs e)
        {
            base.OnVisibleChanged(e);
            if (this.Visible && this.Width > 0)
            {
                this.ActivateContent();
            }
        }
        /// <summary>
        /// 面板尺寸发生变化时的处理
        /// </summary>
        /// <param name="e"></param>
        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);
            if (this.Visible && this.Width > 0)
            {
                this.ActivateContent();
            }
        }
        /// <summary>
        /// 获取面板的持久字符串，一般是对应的完整类名
        /// </summary>
        /// <returns></returns>
        protected override string GetPersistString()
        {
            return this._padDescriptor.Class;
        }
        /// <summary>
        /// 关闭面板时释放响应的资源
        /// </summary>
        /// <param name="disposing"></param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
            if (disposing)
            {
                if (this._padDescriptor != null)
                {
                    this._padDescriptor.Dispose();
                    this._padDescriptor = null;
                }
            }
        }

        #endregion
    }
}