' 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.
' 

Imports Microsoft.VisualBasic
Imports System
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Text
Imports System.Windows.Forms
Imports ESRI.ArcGIS.Controls
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.Geodatabase

Partial Public Class OpenSimplePointDlg
  Inherits Form
#Region "class members"
    Private m_hookHelper As IHookHelper = Nothing
    Private m_workspace As IWorkspace = Nothing
#End Region

#Region "class constructor"
  Public Sub New(ByVal hookHelper As IHookHelper)
    If Nothing Is hookHelper Then
      Throw New Exception("Hook helper is not initialize")
    End If

    InitializeComponent()

    m_hookHelper = hookHelper
  End Sub
#End Region

#Region "UI event handlers"
  Private Sub btnOpenDataSource_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnOpenDataSource.Click
    m_workspace = OpenPlugInWorkspace()

    ListFeatureClasses()
  End Sub

  Private Sub lstDeatureClasses_DoubleClick(ByVal sender As Object, ByVal e As EventArgs) Handles lstDeatureClasses.DoubleClick
    Me.Hide()
    OpenDataset()
    Me.Close()
  End Sub

  Private Sub btnOK_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnOK.Click
    Me.Hide()
    OpenDataset()
    Me.Close()
  End Sub

  Private Sub btnCancel_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnCancel.Click
    Me.Close()
  End Sub
#End Region

#Region "private methods"
  Private Function GetFileName() As String
    Dim dlg As OpenFileDialog = 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

    Dim dr As DialogResult = dlg.ShowDialog()
    If System.Windows.Forms.DialogResult.OK = dr Then
      Return dlg.FileName
    End If

    Return String.Empty
  End Function

  Private Function OpenPlugInWorkspace() As IWorkspace
    Try
      Dim path As String = GetFileName()
      If String.Empty = path Then
        Return Nothing
      End If

      'update the path textbox
      txtPath.Text = path

      'get the type using the ProgID
      Dim t As Type = Type.GetTypeFromProgID("esriGeoDatabase.SimplePointPluginWorkspaceFactory")
      'Use activator in order to create an instance of the workspace factory
      Dim workspaceFactory As IWorkspaceFactory = TryCast(Activator.CreateInstance(t), IWorkspaceFactory)

      'open the workspace
      Return workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(path), 0)
    Catch ex As Exception
      System.Diagnostics.Trace.WriteLine(ex.Message)
      Return Nothing
    End Try
  End Function

  Private Sub ListFeatureClasses()
    lstDeatureClasses.Items.Clear()

    If Nothing Is m_workspace Then
      Return
    End If

    Dim datasetNames As IEnumDatasetName = m_workspace.DatasetNames(esriDatasetType.esriDTAny)
    datasetNames.Reset()
    Dim dsName As IDatasetName

    dsName = datasetNames.Next()
    Do While Not dsName Is Nothing
      lstDeatureClasses.Items.Add(dsName.Name)
      dsName = datasetNames.Next()
    Loop

        'select the first dataset on the list
    If lstDeatureClasses.Items.Count > 0 Then
      lstDeatureClasses.SelectedIndex = 0
      lstDeatureClasses.Refresh()
    End If
  End Sub

  Private Sub OpenDataset()
    Try
      If Nothing Is m_hookHelper OrElse Nothing Is m_workspace Then
        Return
      End If

      If String.Empty Is CStr(lstDeatureClasses.SelectedItem) Then
        Return
      End If

      'get the selected item from the listbox
      Dim dataset As String = CStr(lstDeatureClasses.SelectedItem)

      'cast the workspace into a feature workspace
      Dim featureWorkspace As IFeatureWorkspace = TryCast(m_workspace, IFeatureWorkspace)
      If Nothing Is featureWorkspace Then
        Return
      End If

      'get a featureclass from the workspace
      Dim featureClass As IFeatureClass = featureWorkspace.OpenFeatureClass(dataset)

      'create a new feature layer and add it to the map
      Dim featureLayer As IFeatureLayer = New FeatureLayerClass()
      featureLayer.Name = featureClass.AliasName
      featureLayer.FeatureClass = featureClass
      m_hookHelper.FocusMap.AddLayer(CType(featureLayer, ILayer))
    Catch ex As Exception
      System.Diagnostics.Trace.WriteLine(ex.Message)
    End Try
  End Sub
#End Region
End Class