' 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.Data
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports ESRI.ArcGIS.ADF.BaseClasses
Imports ESRI.ArcGIS.ADF.CATIDs
Imports ESRI.ArcGIS.Controls
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.Geometry

  ''' <summary>
  ''' Summary description for AddMyDynamicLayerCmd.
  ''' </summary>
  <Guid("0ddfd2b0-45ba-416a-93c8-c7db41de30e4"), ClassInterface(ClassInterfaceType.None), ComVisible(True), ProgId("AddMyDynamicLayerCmd")> _
  Public NotInheritable Class AddMyDynamicLayerCmd : Inherits BaseCommand
  #Region "COM Registration Function(s)"
  <ComRegisterFunction(), ComVisible(False)> _
  Private Shared Sub RegisterFunction(ByVal registerType As Type)
    ' Required for ArcGIS Component Category Registrar support
    ArcGISCategoryRegistration(registerType)

    '
    ' TODO: Add any COM registration code here
    '
  End Sub

  <ComUnregisterFunction(), ComVisible(False)> _
  Private Shared Sub UnregisterFunction(ByVal registerType As Type)
    ' Required for ArcGIS Component Category Registrar support
    ArcGISCategoryUnregistration(registerType)

    '
    ' TODO: Add any COM unregistration code here
    '
  End Sub

  #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 Shared Sub ArcGISCategoryRegistration(ByVal registerType As Type)
    Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID)
    ControlsCommands.Register(regKey)

  End Sub
  ''' <summary>
  ''' Required method for ArcGIS Component Category unregistration -
  ''' Do not modify the contents of this method with the code editor.
  ''' </summary>
  Private Shared Sub ArcGISCategoryUnregistration(ByVal registerType As Type)
    Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID)
    ControlsCommands.Unregister(regKey)

  End Sub

  #End Region
  #End Region

  Private m_hookHelper As IHookHelper = Nothing
  Private m_dynamicLayer As MyDynamicLayerClass = Nothing
  Private m_bIsConnected As Boolean = False
  Private m_bOnce As Boolean = True

  Public Sub New()
    MyBase.m_category = ".NET Samples"
    MyBase.m_caption = "Add Dynamic Layer"
    MyBase.m_message = "Add Dynamic Layer"
    MyBase.m_toolTip = "Add Dynamic Layer"
    MyBase.m_name = "AddMyDynamicLayerCmd"

    Try
      Dim bitmapResourceName As String = Me.GetType().Name & ".bmp"
      MyBase.m_bitmap = New Bitmap(Me.GetType(), bitmapResourceName)
    Catch ex As Exception
      System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap")
    End Try
  End Sub

#Region "Overridden Class Methods"

    ''' <summary>
    ''' Occurs when this command is created
    ''' </summary>
    ''' <param name="hook">Instance of the application</param>
    Public Overrides Sub OnCreate(ByVal hook As Object)
        If hook Is Nothing Then
            Return
        End If

        If m_hookHelper Is Nothing Then
            m_hookHelper = New HookHelperClass()
        End If

        m_hookHelper.Hook = hook
    End Sub

    ''' <summary>
    ''' Occurs when this command is clicked
    ''' </summary>
    Public Overrides Sub OnClick()
        'make sure to switch into dynamic mode
        Dim dynamicMap As IDynamicMap = TryCast(m_hookHelper.FocusMap, IDynamicMap)
        'make sure that the current Map supports the DynamicDisplay
        If Nothing Is dynamicMap Then
            Return
        End If

        If (Not m_bIsConnected) Then
            'make sure to switch into dynamic mode
            If (Not dynamicMap.DynamicMapEnabled) Then
                dynamicMap.DynamicMapEnabled = True
            End If

            'do some initializations...
            If m_bOnce Then
                'initialize the dynamic layer
                m_dynamicLayer = New MyDynamicLayerClass()
                m_dynamicLayer.Name = "Dynamic Layer"

                m_bOnce = False
            End If

            'make sure that the layer did not get added to the map        
            Dim bLayerHasBeenAdded As Boolean = False
            If m_hookHelper.FocusMap.LayerCount > 0 Then
                Dim layers As IEnumLayer = m_hookHelper.FocusMap.Layers(Nothing, False)
                layers.Reset()
                Dim layer As ILayer = layers.Next()
                Do While Not layer Is Nothing
                    If TypeOf layer Is MyDynamicLayerClass Then
                        bLayerHasBeenAdded = True
                        Exit Do
                    End If
                    layer = layers.Next()
                Loop
            End If

            If (Not bLayerHasBeenAdded) Then
                'add the dynamic layer to the map
                m_hookHelper.FocusMap.AddLayer(m_dynamicLayer)
            End If
            'connect to the synthetic data source
            m_dynamicLayer.Connect()
        Else
            'disconnect to the synthetic data source
            m_dynamicLayer.Disconnect()

            'delete the layer from the map
            m_hookHelper.FocusMap.DeleteLayer(m_dynamicLayer)

            'disable the dynamic display
            If dynamicMap.DynamicMapEnabled Then
                dynamicMap.DynamicMapEnabled = False
            End If
        End If

        'set the connected flag
        m_bIsConnected = Not m_bIsConnected
    End Sub

    ''' <summary>
    ''' set the state of the button of the command
    ''' </summary>
    Public Overrides ReadOnly Property Checked() As Boolean
        Get
            Return m_bIsConnected
        End Get
    End Property

#End Region

  End Class