// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using System;
using System.Data;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;

namespace MyDynamicLayer
{
  /// <summary>
  /// Summary description for AddMyDynamicLayerCmd.
  /// </summary>
  [Guid("0ddfd2b0-45ba-416a-93c8-c7db41de30e4")]
  [ClassInterface(ClassInterfaceType.None)]
  [ComVisible(true)]
  [ProgId("MyDynamicLayer.AddMyDynamicLayerCmd")]
  public sealed class AddMyDynamicLayerCmd : BaseCommand
  {
    #region COM Registration Function(s)
    [ComRegisterFunction()]
    [ComVisible(false)]
    static void RegisterFunction(Type registerType)
    {
      // Required for ArcGIS Component Category Registrar support
      ArcGISCategoryRegistration(registerType);

      //
      // TODO: Add any COM registration code here
      //
    }

    [ComUnregisterFunction()]
    [ComVisible(false)]
    static void UnregisterFunction(Type registerType)
    {
      // Required for ArcGIS Component Category Registrar support
      ArcGISCategoryUnregistration(registerType);

      //
      // TODO: Add any COM unregistration code here
      //
    }

    #region ArcGIS Component Category Registrar generated code
    /// <summary>
    /// Required method for ArcGIS Component Category registration -
    /// Do not modify the contents of this method with the code editor.
    /// </summary>
    private static void ArcGISCategoryRegistration(Type registerType)
    {
      string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
      ControlsCommands.Register(regKey);

    }
    /// <summary>
    /// Required method for ArcGIS Component Category unregistration -
    /// Do not modify the contents of this method with the code editor.
    /// </summary>
    private static void ArcGISCategoryUnregistration(Type registerType)
    {
      string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
      ControlsCommands.Unregister(regKey);

    }

    #endregion
    #endregion

    private IHookHelper           m_hookHelper      = null;
    private MyDynamicLayerClass   m_dynamicLayer    = null;
    private bool                  m_bIsConnected    = false;
    private bool                  m_bOnce           = true;

    public AddMyDynamicLayerCmd()
    {
      base.m_category = ".NET Samples"; 
      base.m_caption = "Add Dynamic Layer"; 
      base.m_message = "Add Dynamic Layer";
      base.m_toolTip = "Add Dynamic Layer";
      base.m_name = "MyDynamicLayer_AddMyDynamicLayerCmd";   

      try
      {
        string bitmapResourceName = GetType().Name + ".bmp";
        base.m_bitmap = new Bitmap(GetType(), bitmapResourceName);
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
      }
    }

    #region Overriden Class Methods

    /// <summary>
    /// Occurs when this command is created
    /// </summary>
    /// <param name="hook">Instance of the application</param>
    public override void OnCreate(object hook)
    {
      if (hook == null)
        return;

      if (m_hookHelper == null)
        m_hookHelper = new HookHelperClass();

      m_hookHelper.Hook = hook;
    }

    /// <summary>
    /// Occurs when this command is clicked
    /// </summary>
    public override void OnClick()
    {
      //make sure to switch into dynamic mode
      IDynamicMap dynamicMap = m_hookHelper.FocusMap as IDynamicMap;
      //make sure that the current Map supports the DynamicDisplay
      if (null == dynamicMap)
        return;

      if (!m_bIsConnected)
      {
        //make sure to switch into dynamic mode
        if (!dynamicMap.DynamicMapEnabled)
          dynamicMap.DynamicMapEnabled = true;

        //do some initializations...
        if (m_bOnce)
        {
          //initialize the dynamic layer
          m_dynamicLayer = new MyDynamicLayerClass();
          m_dynamicLayer.Name = "Dynamic Layer";

          m_bOnce = false;
        }

        //make sure that the layer did not get added to the map        
        bool bLayerHasBeenAdded = false;
        if (m_hookHelper.FocusMap.LayerCount > 0)
        {
          IEnumLayer layers = m_hookHelper.FocusMap.get_Layers(null, false);
          layers.Reset();
          ILayer layer = layers.Next();
          while (layer != null)
          {
            if (layer is MyDynamicLayerClass)
            {
              bLayerHasBeenAdded = true;
              break;
            }
            layer = layers.Next();
          }
        }

        if (!bLayerHasBeenAdded)
        {
          //add the dynamic layer to the map
          m_hookHelper.FocusMap.AddLayer(m_dynamicLayer);
        }
        //connect to the synthetic data source
        m_dynamicLayer.Connect();
      }
      else
      {
        //disconnect to the synthetic data source
        m_dynamicLayer.Disconnect();

        //delete the layer from the map
        m_hookHelper.FocusMap.DeleteLayer(m_dynamicLayer);

        //disable the dynamic display
        if (dynamicMap.DynamicMapEnabled)
          dynamicMap.DynamicMapEnabled = false;
      }

      //set the connected flag
      m_bIsConnected = !m_bIsConnected;
    }

    /// <summary>
    /// set the state of the button of the command
    /// </summary>
    public override bool Checked
    {
      get
      {
        return m_bIsConnected;
      }
    }

    #endregion

  }
}