// Copyright 2006 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 use restrictions at /arcgis/developerkit/userestrictions.

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Controls;

namespace UI
{
    /// <summary>
    /// Summary description for LoadLayerFileCmd.
    /// </summary>
    [Guid("c45d8097-5c9b-443c-8859-1663b7b2c540")]
    [ClassInterface(ClassInterfaceType.None)]
    [ProgId("MapControlSaveLayerFile.LoadLayerFileCmd")]
    public sealed class LoadLayerFileCmd : 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 IHookHelper m_hookHelper;

        public LoadLayerFileCmd()
        {
            base.m_category = ".NET Samples";
            base.m_caption = "Load Layer File";
            base.m_message = "Load Layer File from disk";
            base.m_toolTip = "Load Layer File";
            base.m_name = "MapControlSaveLayerFile_LoadLayerFileCmd";

            try
            {
                //
                // TODO: change bitmap name if necessary
                //
                string bitmapResourceName = GetType().Name + ".bmp";
                base.m_bitmap = new Bitmap(GetType(), bitmapResourceName);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
            }
        }

        #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;

            if (m_hookHelper == null)
                m_hookHelper = new HookHelperClass();

            m_hookHelper.Hook = hook;

            // TODO:  Add other initialization code
        }

        /// <summary>
        /// Occurs when this command is clicked
        /// </summary>
        public override void OnClick()
        {
            //nedd to get the layer from the custom-property of the map
            if (null == m_hookHelper)
                return;

            //get the mapControl hook
            object hook = null;
            if (m_hookHelper.Hook is IToolbarControl2)
            {
                hook = ((IToolbarControl2)m_hookHelper.Hook).Buddy;
            }
            else
            {
                hook = m_hookHelper.Hook;
            }

            //get the custom property from which is supposed to be the layer to be saved
            object customProperty = null;
            IMapControl3 mapControl = null;
            if (hook is IMapControl3)
            {
                mapControl = (IMapControl3)hook;
                customProperty = mapControl.CustomProperty;
            }
            else
                return;

            OpenFileDialog ofdlg = new OpenFileDialog();
            ofdlg.Multiselect = true;
            ofdlg.RestoreDirectory = true;
            ofdlg.Title = "Load Layer Files";
            ofdlg.Filter = "Layer File|*.lyr|All Files|*.*";
            DialogResult dr = ofdlg.ShowDialog();
            if (DialogResult.OK == dr)
            {
                string[] files = ofdlg.FileNames;

                foreach (string file in files)
                {
                    if (System.IO.File.Exists(file))
                        mapControl.AddLayerFromFile(file, 0);
                }
            }
        }

        #endregion
    }
}