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

namespace RSSWeatherLayer
{
  /// <summary>
  /// Refreshes the layer's data (runs the layer update thread)
  /// </summary>     
  [Guid("30FD7DC6-6696-4101-99AD-4C8CDE968E4B")]
  [ProgId("RSSWeatherLayer.RefreshLayerCmd")]
  [ComVisible(true)]
  public class RefreshLayerCmd: 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

    //Class members
    private IHookHelper m_hookHelper = null;

    /// <summary>
    /// CTor
    /// </summary>
    public RefreshLayerCmd()
    {
      base.m_category = "Weather";
      base.m_caption = "Refresh layer";
      base.m_message = "Refresh the layer";
      base.m_toolTip = "Refresh layer";
      base.m_name = base.m_category + "_" + base.m_caption;

      try
      {
        base.m_bitmap = new Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "RefreshLayerCmd.bmp"));
      }
      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)
    {
      //Instantiate the hook helper
      if (m_hookHelper == null)
        m_hookHelper = new HookHelperClass();

      //set the hook
      m_hookHelper.Hook = hook;
    }

    /// <summary>
    /// Occurs when this command is clicked
    /// </summary>
    public override void OnClick()
    {
      try
      {
        if (0 == m_hookHelper.FocusMap.LayerCount)
          return;

        RSSWeatherLayerClass weatherLayer = null;
        
        //get the weather layer
        IEnumLayer layers = m_hookHelper.FocusMap.get_Layers(null, false);
        layers.Reset();
        ILayer layer = layers.Next();
        while (layer != null)
        {
          if (layer is RSSWeatherLayerClass)
          {
            weatherLayer = (RSSWeatherLayerClass)layer;
            weatherLayer.Refresh();
            return;
          }
          layer = layers.Next();
        }
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
      }
    }

    #endregion
  }
}