// 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.Framework;
using ESRI.ArcGIS.ArcMapUI;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Carto;
using System.Collections.Generic;

namespace SelectionCOMSample
{
  /// <summary>
  /// Summary description for SelectionTargetComboBox.
  /// </summary>
  [Guid("80e577d6-1b27-4471-986e-c04050a0e2d8")]
  [ClassInterface(ClassInterfaceType.None)]
  [ProgId("SelectionCOMSample.SelectionTargetComboBox")]
  public sealed class SelectionTargetComboBox : BaseCommand, IComboBox
  {
    #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);
      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);
      MxCommands.Unregister(regKey);

    }

    #endregion
    #endregion

    private IMxDocument m_doc;
    private static SelectionTargetComboBox s_comboBox;
    private int m_selAllCookie;
    private IComboBoxHook m_comboBoxHook;
    private Dictionary<int, IFeatureLayer> m_list;

    public SelectionTargetComboBox()
    {
      base.m_category = "Developer Samples";
      base.m_caption = "Selection Target";
      base.m_message = "Select the selection target C#.";
      base.m_toolTip = "Select the selection target C#.";  
      base.m_name = "ESRI_SelectionCOMSample_SelectionTargetComboBox";

      m_selAllCookie = -1;
      s_comboBox = this;
      m_list = new Dictionary<int, IFeatureLayer>();
      try
      {
        base.m_bitmap = new Bitmap(GetType().Assembly.GetManifestResourceStream("SelectionCOMSample.Images.SelectionTargetComboBox.png"));
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
      }
    }
    internal static SelectionTargetComboBox GetSelectionComboBox()
    {
      return s_comboBox;
    }
    internal void AddItem(string itemName, IFeatureLayer layer)
    {
      if (m_selAllCookie == -1)
        m_selAllCookie = m_comboBoxHook.Add("Select All");

      //Add each item to combo box.
      int cookie = m_comboBoxHook.Add(itemName);
      m_list.Add(cookie, layer);
    }

    internal void ClearAll()
    {
      m_selAllCookie = -1;
      m_comboBoxHook.Clear();
    }

    #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;

      m_comboBoxHook = hook as IComboBoxHook;

      IApplication application = m_comboBoxHook.Hook as IApplication;
      m_doc = application.Document as IMxDocument;

      //Disable if it is not ArcMap
      if (m_comboBoxHook.Hook is IMxApplication)
        base.m_enabled = true;
      else
        base.m_enabled = false;

    }

    /// <summary>
    /// Occurs when this command is clicked
    /// </summary>
    public override void OnClick()
    {
    }

    #endregion

    #region IComboBox Members

    public int DropDownHeight
    {
      get { return 4; }
    }

    public string DropDownWidth
    {
      get { return "WWWWWWWWWWWWWWWWW"; }
    }

    public bool Editable
    {
      get { return false; }
    }

    public string HintText
    {
      get { return "Choose a target layer."; }
    }

    public void OnEditChange(string editString)
    {
    }

    public void OnEnter()
    {
    }

    public void OnFocus(bool set)
    {
    }

    public void OnSelChange(int cookie)
    {
      if (cookie == -1)
        return;

      foreach (KeyValuePair<int, IFeatureLayer> item in m_list)
      {
        //All feature layers are selectable if "Select All" is selected;
        //otherwise, only the selected layer is selectable.
        IFeatureLayer fl = item.Value;
        if (fl == null)
          continue;

        if (cookie == item.Key)
        {
          fl.Selectable = true;
          continue;
        }

        fl.Selectable = (cookie == m_selAllCookie) ? true : false;
      }

      //Fire ContentsChanged event to cause TOC to refresh with new selected layers.
      m_doc.ActiveView.ContentsChanged(); ;

    }

    public bool ShowCaption
    {
      get { return false; }
    }

    public string Width
    {
      get { return "WWWWWWWWWWWWWX"; }
    }

    #endregion
  }
}