// 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 System;
using ESRI.ArcGIS.Analyst3D;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;

namespace sceneTools
{
  [ClassInterface(ClassInterfaceType.None)]
  [Guid("96083F0A-067C-482d-A616-31131131E27E")]

  public sealed class NarrowFOV : 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 ISceneHookHelper m_pSceneHookHelper;

    public NarrowFOV()
    {
      base.m_category = "Sample_SceneControl(C#)";
      base.m_caption = "Narrow Field of View";
      base.m_toolTip = "Narrow Field of View";
      base.m_name = "Sample_SceneControl(C#)/Narrow Field of View";
      base.m_message = "Narrow the Field of View";

      //Load resources
      string[] res = GetType().Assembly.GetManifestResourceNames();
      if(res.GetLength(0) > 0)
      {
        base.m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream("sceneTools.narrow.bmp"));
      }
      m_pSceneHookHelper = new SceneHookHelperClass ();
    }

    public override bool Enabled
    {
      get
      {
        if(m_pSceneHookHelper.Hook == null || m_pSceneHookHelper.Scene == null)
          return false;
        else
        {
          ICamera pCamera = (ICamera) m_pSceneHookHelper.Camera;

          //Disable if orthographic (2D) view
          if(pCamera.ProjectionType == esri3DProjectionType.esriOrthoProjection)
            return false;
          else
            return true;
        }
      }
    }
  
    public override void OnCreate(object hook)
    {
      m_pSceneHookHelper.Hook = hook;
    }

    public override void OnClick()
    {
      //Get scene viewer's camera
      ICamera pCamera = (ICamera) m_pSceneHookHelper.Camera;

      //Widen the field of view
      double dAngle;
      dAngle = pCamera.ViewFieldAngle;
      pCamera.ViewFieldAngle = dAngle * 0.9;

      //Redraw the scene viewer
      ISceneViewer pSceneViewer = (ISceneViewer) m_pSceneHookHelper.ActiveViewer;
      pSceneViewer.Redraw(false);
    }

  }
}