' 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.
' 

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.IO
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.Desktop.AddIns

Imports My

Namespace SelectionSample
  Public Class SelectionTargetComboBox
    Inherits ESRI.ArcGIS.Desktop.AddIns.ComboBox
  Private Shared s_comboBox As SelectionTargetComboBox
  Private m_selAllCookie As Integer

  Public Sub New()
    m_selAllCookie = -1
    s_comboBox = Me
  End Sub

  Friend Shared Function GetSelectionComboBox() As SelectionTargetComboBox
    Return s_comboBox
  End Function

  Friend Sub AddItem(ByVal itemName As String, ByVal layer As IFeatureLayer)
    If s_comboBox.items.Count = 0 Then
    m_selAllCookie = s_comboBox.Add("Select All")
    s_comboBox.Select(m_selAllCookie)
    End If

    ' Add each item to combo box.
    Dim cookie As Integer = s_comboBox.Add(itemName, layer)
  End Sub

  Friend Sub ClearAll()
    m_selAllCookie = -1
    s_comboBox.Clear()
  End Sub

  Protected Overrides Sub OnUpdate()
    Me.Enabled = SelectionExtension.IsExtensionEnabled()
  End Sub

  Protected Overrides Sub OnSelChange(ByVal cookie As Integer)
    If cookie = -1 Then
    Return
    End If

    For Each item As ComboBox.Item In Me.items
    ' All feature layers are selectable if "Select All" is selected;
    ' otherwise, only the selected layer is selectable.
    Dim fl As IFeatureLayer = TryCast(item.Tag, IFeatureLayer)
    If fl Is Nothing Then
      Continue For
    End If

    If cookie = item.Cookie Then
      fl.Selectable = True
      Continue For
    End If

    fl.Selectable = If((cookie = m_selAllCookie), True, False)
    Next item

    ' Fire ContentsChanged event to cause TOC to refresh with new selected layers.
    ArcMap.Document.ActiveView.ContentsChanged()


  End Sub
  End Class

End Namespace