// Copyright 2012 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 ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.SystemUI;

namespace ContextMenu
{
  public sealed class LayerVisibility : BaseCommand, ICommandSubType 
  {
    private IHookHelper m_hookHelper = new HookHelperClass();
    private long m_subType;

    public LayerVisibility()
    {
    }
  
    public override void OnClick()
    {
      for (int i=0; i <= m_hookHelper.FocusMap.LayerCount - 1; i++)
      {
        if (m_subType == 1) m_hookHelper.FocusMap.get_Layer(i).Visible = true;
        if (m_subType == 2) m_hookHelper.FocusMap.get_Layer(i).Visible = false;
      }
      m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography,null,null);
    }
  
    public override void OnCreate(object hook)
    {
      m_hookHelper.Hook = hook;
    }
  
    public int GetCount()
    {
      return 2;
    }
  
    public void SetSubType(int SubType)
    {
      m_subType = SubType;
    }
  
    public override string Caption
    {
      get
      {
        if (m_subType == 1) return "Turn All Layers On";
        else  return "Turn All Layers Off";
      }
    }
  
    public override bool Enabled
    {
      get
      {
        bool enabled = false; int i;
        if (m_subType == 1) 
        {
          for (i=0;i<=m_hookHelper.FocusMap.LayerCount - 1;i++)
          {
            if (m_hookHelper.ActiveView.FocusMap.get_Layer(i).Visible == false)
            {
              enabled = true;
              break;
            }
          }
        }
        else 
        {
          for (i=0;i<=m_hookHelper.FocusMap.LayerCount - 1;i++)
          {
            if (m_hookHelper.ActiveView.FocusMap.get_Layer(i).Visible == true)
            {
              enabled = true;
              break;
            }
          }
        }
        return enabled;
      }
    }
  }
}