// 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.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.SystemUI;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.CATIDs;

namespace PanZoom
{
    [ClassInterface(ClassInterfaceType.None)]
    [Guid("199FD437-CC7C-44c5-AC99-8AE9134F4A4C")]

    public class FixedZoomIn : ICommand
    {
        #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

        [DllImport("gdi32.dll")]
        static extern bool DeleteObject(IntPtr hObject);

        private bool m_enabled;
        private System.Drawing.Bitmap m_bitmap;
        private IntPtr m_hBitmap;
        private IHookHelper m_pHookHelper;

        public FixedZoomIn()
        {
            string[] res = GetType().Assembly.GetManifestResourceNames();
            if (res.GetLength(0) > 0)
            {
                m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "zoominfxd.bmp"));
                if (m_bitmap != null)
                {
                    m_bitmap.MakeTransparent(m_bitmap.GetPixel(0, 0));
                    m_hBitmap = m_bitmap.GetHbitmap();
                }
            }
            m_pHookHelper = new HookHelperClass();
        }

        ~FixedZoomIn()
        {
            if (m_hBitmap.ToInt32() != 0)
                DeleteObject(m_hBitmap);
        }

        #region ICommand Members

        public void OnClick()
        {
            //Get IActiveView interface
            IActiveView pActiveView = (IActiveView)m_pHookHelper.FocusMap;

            //Get IEnvelope interface
            IEnvelope pEnvelope = (IEnvelope)pActiveView.Extent;

            //Expand envelope and refresh the view
            pEnvelope.Expand(0.75, 0.75, true);
            pActiveView.Extent = pEnvelope;
            pActiveView.Refresh();
        }

        public string Message
        {
            get
            {
                return "Zoom in on the center of the map";
            }
        }

        public int Bitmap
        {
            get
            {
                return m_hBitmap.ToInt32();
            }
        }

        public void OnCreate(object hook)
        {
            m_pHookHelper.Hook = hook;
            m_enabled = true;
        }

        public string Caption
        {
            get
            {
                return "Fixed Zoom In";
            }
        }

        public string Tooltip
        {
            get
            {
                return "Fixed Zoom In";
            }
        }

        public int HelpContextID
        {
            get
            {
                // TODO:  Add FixedZoomIn.HelpContextID getter implementation
                return 0;
            }
        }

        public string Name
        {
            get
            {
                return "Sample_Pan/FixedZoomIn";
            }
        }

        public bool Checked
        {
            get
            {
                return false;
            }
        }

        public bool Enabled
        {
            get
            {
                return m_enabled;
            }
        }

        public string HelpFile
        {
            get
            {
                // TODO:  Add FixedZoomIn.HelpFile getter implementation
                return null;
            }
        }

        public string Category
        {
            get
            {
                return "Sample_Pan/Zoom";
            }
        }

        #endregion
    }
}