// 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 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("90A4082D-8A9A-4858-BBFC-4DE3DF05905A")]

    public sealed class ExpandFOV : 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 ExpandFOV()
        {
            base.m_category = "Sample_SceneControl(C#)";
            base.m_caption = "Expand Field of View";
            base.m_toolTip = "Expand Field of View";
            base.m_name = "Sample_SceneControl(C#)/Expand Field of View";
            base.m_message = "Expand 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.expand.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 * 1.1;

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