// 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 System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;

namespace ESRI.ArcGIS.Samples.SimplePointPlugin
{
  public partial class OpenSimplePointDlg : Form
  {
    #region class memebers
    private IHookHelper m_hookHelper = null;
    IWorkspace m_workspace = null;
    #endregion

    #region class constructor
    public OpenSimplePointDlg(IHookHelper hookHelper)
    {
      if (null == hookHelper)
        throw new Exception("Hook helper is not initialize");

      InitializeComponent();
      
      m_hookHelper = hookHelper;
    }
    #endregion

    #region UI event handlers
    private void btnOpenDataSource_Click(object sender, EventArgs e)
    {
      m_workspace = OpenPlugInWorkspace();

      ListFeatureClasses();
    }

    private void lstDeatureClasses_DoubleClick(object sender, EventArgs e)
    {
      this.Hide();
      OpenDataset();
      this.Close();
    }

    private void btnOK_Click(object sender, EventArgs e)
    {
      this.Hide();
      OpenDataset();
      this.Close();
    }

    private void btnCancel_Click(object sender, EventArgs e)
    {
      this.Close();
    }
    #endregion

    #region private methods
    private string GetFileName()
    {
      OpenFileDialog dlg = new OpenFileDialog();
      dlg.Filter = "Simple Point (*.csp)|*.csp";
      dlg.Title = "Open Simple Point file";
      dlg.RestoreDirectory = true;
      dlg.CheckPathExists = true;
      dlg.CheckFileExists = true;
      dlg.Multiselect = false;

      DialogResult dr = dlg.ShowDialog();
      if (DialogResult.OK == dr)
        return dlg.FileName;

      return string.Empty;
    }

    private IWorkspace OpenPlugInWorkspace()
    {
      try
      {
        string path = GetFileName();
        if (string.Empty == path)
          return null;

        //update the path textbox
        txtPath.Text = path;
        
        //get the type using the ProgID
        Type t = Type.GetTypeFromProgID("esriGeoDatabase.SimplePointPluginWorkspaceFactory");
        //Use activator in order to create an instance of the workspace factory
        IWorkspaceFactory workspaceFactory = Activator.CreateInstance(t) as IWorkspaceFactory;

        //open the workspace
        return workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(path), 0);
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
        return null;
      }
    }

    private void ListFeatureClasses()
    {
      lstDeatureClasses.Items.Clear();

      if (null == m_workspace)
        return;

      IEnumDatasetName datasetNames = m_workspace.get_DatasetNames(esriDatasetType.esriDTAny);
      datasetNames.Reset();
      IDatasetName dsName;
      while ((dsName = datasetNames.Next()) != null)
      {
        lstDeatureClasses.Items.Add(dsName.Name);
      }

      //select the first dataset on the list
      if (lstDeatureClasses.Items.Count > 0)
      {
        lstDeatureClasses.SelectedIndex = 0;
        lstDeatureClasses.Refresh();
      }
    }

    private void OpenDataset()
    {
      try
      {
        if (null == m_hookHelper || null == m_workspace)
          return;

        if (string.Empty == (string)lstDeatureClasses.SelectedItem)
          return;

        //get the selected item from the listbox
        string dataset = (string)lstDeatureClasses.SelectedItem;

        //cast the workspace into a feature workspace
        IFeatureWorkspace featureWorkspace = m_workspace as IFeatureWorkspace;
        if (null == featureWorkspace)
          return;

        //get a featureclass from the workspace
        IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(dataset);

        //create a new feature layer and add it to the map
        IFeatureLayer featureLayer = new FeatureLayerClass();
        featureLayer.Name = featureClass.AliasName;
        featureLayer.FeatureClass = featureClass;
        m_hookHelper.FocusMap.AddLayer((ILayer)featureLayer);
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
      }
    }
    #endregion
  }
}