' 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 ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.GeomeTry
Imports ESRI.ArcGIS.Controls
Imports ESRI.ArcGIS.Display
Imports ESRI.ArcGIS.ADF.BaseClasses
Imports ESRI.ArcGIS.ADF.CATIDs
Imports System.Runtime.InteropServices

<ComClass(Pan.ClassId, Pan.InterfaceId, Pan.EventsId)> _
Public NotInheritable Class Pan
    Inherits BaseTool

#Region "COM GUIDs"
    ' These  GUIDs provide the COM identity for this class 
    ' and its COM interfaces. If you change them, existing 
    ' clients will no longer be able to access the class.
    Public Const ClassId As String = "64653147-697B-4B0B-B728-9529BA8A2AAF"
    Public Const InterfaceId As String = "1B28A647-9A8B-4F92-A0C8-AFE121C847E1"
    Public Const EventsId As String = "E35275E7-89D3-43E1-96B8-C2088CE7C7AE"
#End Region
#Region "COM Registration Function(s)"
    <ComRegisterFunction(), ComVisibleAttribute(False)> _
    Public Shared Sub RegisterFunction(ByVal registerType As Type)
        ' Required for ArcGIS Component Category Registrar support
        ArcGISCategoryRegistration(registerType)

        'Add any COM registration code after the ArcGISCategoryRegistration() call

    End Sub

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

        'Add any COM unregistration code after the ArcGISCategoryUnregistration() call

    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_pHookHelper As IHookHelper
    Private m_pEnabled As Boolean
    Private m_focusScreenDisplay As IScreenDisplay
    Private m_PanOperation As Boolean
    Private m_check As Boolean
    Private m_cursorStart As System.Windows.Forms.Cursor
    Private m_cursorMove As System.Windows.Forms.Cursor

    ' A creatable COM class must have a Public Sub New() 
    ' with no parameters, otherwise, the class will not be 
    ' registered in the COM registry and cannot be created 
    ' via CreateObject.
    Public Sub New()
        MyBase.New()

        MyBase.m_category = "Sample_Pan_VBNET/Zoom"
        MyBase.m_caption = "Pan"
        MyBase.m_message = "Pans The Display by Grabbing"
        MyBase.m_toolTip = "Pan by Grab"
        MyBase.m_name = "Sample_Pan/Zoom_Pan"

        Dim res() As String = GetType(Pan).Assembly.GetManifestResourceNames()
        If res.GetLength(0) > 0 Then
            MyBase.m_bitmap = New System.Drawing.Bitmap(GetType(Pan).Assembly.GetManifestResourceStream("PanZoomVBNET.Pan.bmp"))
        End If
        m_pHookHelper = New HookHelperClass
    End Sub

    Public Overrides Sub OnCreate(ByVal hook As Object)
        m_pHookHelper.Hook = hook
        m_pEnabled = True
        m_check = False
        m_cursorStart = New System.Windows.Forms.Cursor(GetType(Pan).Assembly.GetManifestResourceStream("PanZoomVBNET.Hand.cur"))
        m_cursorMove = New System.Windows.Forms.Cursor(GetType(Pan).Assembly.GetManifestResourceStream("PanZoomVBNET.MoveHand.cur"))
    End Sub

    Public Overrides Sub OnMouseDown(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer)

        If Button <> 1 Then
            Return
        End If

        Dim activeView As IActiveView = m_pHookHelper.ActiveView
        Dim point As IPoint
        'If in PageLayout view, find the closest map
        If Not TypeOf activeView Is IMap Then
            point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y)
            Dim hitMap As IMap = activeView.HitTestMap(point)

            'Exit if no map found
            If hitMap Is Nothing Then
                Return
            End If

            If Not activeView Is m_pHookHelper.FocusMap Then
                activeView.FocusMap = hitMap
            End If

        End If
        'Start the pan operation
        point = m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y)
        m_focusScreenDisplay = getFocusDisplay()
        m_focusScreenDisplay.PanStart(point)

        m_PanOperation = True
    End Sub

    Private Function getFocusDisplay() As IScreenDisplay
        'Get the ScreenDisplay that has focus
        Dim activeView As IActiveView = m_pHookHelper.ActiveView

        activeView = CType(m_pHookHelper.ActiveView.FocusMap, IActiveView)  'layout view
        Return activeView.ScreenDisplay

    End Function

    Public Overrides Sub OnMouseMove(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer)

        If Button <> 1 Then
            Return
        End If

        If Not m_PanOperation Then
            Return
        End If

        Dim point As IPoint = m_focusScreenDisplay.DisplayTransformation.ToMapPoint(X, Y)
        m_focusScreenDisplay.PanMoveTo(point)
    End Sub

    Public Overrides Sub OnMouseUp(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer)

        If Button <> 1 Then
            Return
        End If

        If Not m_PanOperation Then
            Return
        End If

        Dim extent As IEnvelope = m_focusScreenDisplay.PanStop()

        'Check if user dragged a rectangle or just clicked.
        'If a rectangle was dragged, m_ipFeedback in non-NULL
        If Not extent Is Nothing Then
            m_focusScreenDisplay.DisplayTransformation.VisibleBounds = extent
            m_focusScreenDisplay.Invalidate(Nothing, True, CType(esriScreenCache.esriAllScreenCaches, Short))
        End If

        m_PanOperation = False
    End Sub

    Public Overrides Function Deactivate() As Boolean
        Return True
    End Function

    Public Overrides ReadOnly Property Cursor() As Integer
        Get
            If (m_PanOperation) Then
                Return m_cursorMove.Handle.ToInt32()
            Else
                Return m_cursorStart.Handle.ToInt32()
            End If
        End Get
    End Property
End Class