#region File Description
//-----------------------------------------------------------------------------
// MainForm.cs
//
// Microsoft XNA Community Game Platform
// Copyright (C) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#endregion

#region Using Statements
using System;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
#endregion

namespace WinFormsContentLoading
{
    /// <summary>
    /// Custom form provides the main user interface for the program.
    /// In this sample we used the designer to fill the entire form with a
    /// ModelViewerControl, except for the menu bar which provides the
    /// "File / Open..." option.
    /// </summary>
    public partial class MainForm : Form
    {
        ContentBuilder contentBuilder;
        ContentManager contentManager;


        /// <summary>
        /// Constructs the main form.
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            contentBuilder = new ContentBuilder();

            contentManager = new ContentManager(modelViewerControl.Services,
                                                contentBuilder.OutputDirectory);

            /// Automatically bring up the "Load Model" dialog when we are first shown.
            this.Shown += OpenMenuClicked;
        }


        /// <summary>
        /// Event handler for the Exit menu option.
        /// </summary>
        void ExitMenuClicked(object sender, EventArgs e)
        {
            Close();
        }


        /// <summary>
        /// Event handler for the Open menu option.
        /// </summary>
        void OpenMenuClicked(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();

            // Default to the directory which contains our content files.
            string assemblyLocation = Assembly.GetExecutingAssembly().Location;
            string relativePath = Path.Combine(assemblyLocation, "../../../../Content");
            string contentPath = Path.GetFullPath(relativePath);

            fileDialog.InitialDirectory = contentPath;

            fileDialog.Title = "Load Model";

            fileDialog.Filter = "Model Files (*.fbx;*.x)|*.fbx;*.x|" +
                                "FBX Files (*.fbx)|*.fbx|" +
                                "X Files (*.x)|*.x|" +
                                "All Files (*.*)|*.*";

            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                LoadModel(fileDialog.FileName);
            }
        }


        /// <summary>
        /// Loads a new 3D model file into the ModelViewerControl.
        /// </summary>
        void LoadModel(string fileName)
        {
            Cursor = Cursors.WaitCursor;

            // Unload any existing model.
            modelViewerControl.Model = null;
            contentManager.Unload();

            // Tell the ContentBuilder what to build.
            contentBuilder.Clear();
            contentBuilder.Add(fileName, "Model", null, "ModelProcessor");

            // Build this new model data.
            string buildError = contentBuilder.Build();

            if (string.IsNullOrEmpty(buildError))
            {
                // If the build succeeded, use the ContentManager to
                // load the temporary .xnb file that we just created.
                modelViewerControl.Model = contentManager.Load<Model>("Model");
            }
            else
            {
                // If the build failed, display an error message.
                MessageBox.Show(buildError, "Error");
            }

            Cursor = Cursors.Arrow;
        }
    }
}