// 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>
  /// Selects an item by a given city name
  /// </summary>
  [ClassInterface(ClassInterfaceType.None)]
  [Guid("B44F2830-4116-42c2-8A2C-A7097CD7F7BE")]
  [ProgId("RSSWeatherLayer.SelectByCityName")]
  [ComVisible(true)]
  public sealed class SelectByCityName: 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);
      MxCommands.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);
      MxCommands.Unregister(regKey);
    }

    #endregion
    #endregion

    //Class members
    private IHookHelper                m_pHookHelper    = null;  
    private RSSWeatherLayerClass    m_weatherLayer  = null;
    private WeatherItemSelectionDlg    m_selectionDlg  = null;

    public SelectByCityName()
    {
      base.m_category = "Weather";
      base.m_caption = "Select Weather item By Cityname";
      base.m_message = "Select By Cityname";
      base.m_toolTip = "Select By Cityname";
      base.m_name = base.m_category + "_" + base.m_caption;

      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)
    {
      //Instantiate the hook helper
      if (m_pHookHelper == null)
        m_pHookHelper = new HookHelperClass ();

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

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

        //get the weather layer
        IEnumLayer layers = m_pHookHelper.FocusMap.get_Layers(null, false);
        layers.Reset();
        ILayer layer = layers.Next();
        while(layer != null)
        {
          if(layer is RSSWeatherLayerClass)
          {
            m_weatherLayer = (RSSWeatherLayerClass)layer;
            break;
          }
          layer = layers.Next();
        }
        
        if(m_weatherLayer != null)
        {
          if(null == m_selectionDlg || m_selectionDlg.IsDisposed)
          {
            m_selectionDlg = new WeatherItemSelectionDlg(m_weatherLayer, m_pHookHelper.ActiveView);
          }
          
          m_selectionDlg.Show();
        }
      }
      catch(Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
      }
    }

    #endregion
  }
}