' 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.Drawing
Imports System.Runtime.InteropServices
Imports System.Windows.Forms
Imports ESRI.ArcGIS.ADF.BaseClasses
Imports ESRI.ArcGIS.ADF.CATIDs
Imports ESRI.ArcGIS.Controls
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.SystemUI

  ''' <summary>
  ''' Summary description for CreateNewDocument.
  ''' </summary>
  Public Class CreateNewDocument : Inherits BaseCommand
  Private m_hookHelper As IHookHelper = Nothing

  'constructor
  Public Sub New()
    'update the base properties
    MyBase.m_category = ".NET Samples"
    MyBase.m_caption = "NewDocument"
    MyBase.m_message = "Create a new map"
    MyBase.m_toolTip = "Create a new map"
    MyBase.m_name = "NewDocumentCommand"
  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 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()
    Dim mapControl As IMapControl3 = Nothing

    'get the MapControl from the hook in case the container is a ToolbatControl
    If TypeOf m_hookHelper.Hook Is IToolbarControl Then
      mapControl = CType((CType(m_hookHelper.Hook, IToolbarControl)).Buddy, IMapControl3)
      'In case the container is MapControl
    ElseIf TypeOf m_hookHelper.Hook Is IMapControl3 Then
      mapControl = CType(m_hookHelper.Hook, IMapControl3)
    Else
      MessageBox.Show("Active control must be MapControl!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
      Return
    End If

    'allow the user to save the current document
    Dim res As DialogResult = MessageBox.Show("Would you like to save the current document?", "AoView", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
    If res = DialogResult.Yes Then
      'launch the save command (why work hard!?)
      Dim command As ICommand = New ControlsSaveAsDocCommandClass()
      command.OnCreate(m_hookHelper.Hook)
      command.OnClick()
    End If

        'create a new Map
    Dim map As IMap = New MapClass()
    map.Name = "Map"

    'assign the new map to the MapControl
    mapControl.DocumentFilename = String.Empty
    mapControl.Map = map
  End Sub

  #End Region
  End Class