ArcObjects Library Reference  

ExpandFOV

About the Custom scene navigation commands Sample

[C#]

ExpandFOV.cs

using System;
using ESRI.ArcGIS.Analyst3D;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;

namespace sceneTools
{
    [ClassInterface(ClassInterfaceType.None)]
    [Guid("90A4082D-8A9A-4858-BBFC-4DE3DF05905A")]

    public sealed class ExpandFOV : BaseCommand
    {
        #region COM Registration Function(s)
        [ComRegisterFunction()]
        [ComVisible(false)]
        static void RegisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryRegistration(registerType);

            //
            // TODO: Add any COM registration code here
            //
        }

        [ComUnregisterFunction()]
        [ComVisible(false)]
        static void UnregisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryUnregistration(registerType);

            //
            // TODO: Add any COM unregistration code here
            //
        }

        #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 static void ArcGISCategoryRegistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Register(regKey);

        }
        /// <summary>
        /// Required method for ArcGIS Component Category unregistration -
        /// Do not modify the contents of this method with the code editor.
        /// </summary>
        private static void ArcGISCategoryUnregistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Unregister(regKey);

        }

        #endregion
        #endregion

        private ISceneHookHelper m_pSceneHookHelper;

        public ExpandFOV()
        {
            base.m_category = "Sample_SceneControl(C#)";
            base.m_caption = "Expand Field of View";
            base.m_toolTip = "Expand Field of View";
            base.m_name = "Sample_SceneControl(C#)/Expand Field of View";
            base.m_message = "Expand the Field of View";

            //Load resources
            string[] res = GetType().Assembly.GetManifestResourceNames();
            if (res.GetLength(0) > 0)
            {
                base.m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream("sceneTools.expand.bmp"));
            }
            m_pSceneHookHelper = new SceneHookHelperClass();
        }
                
        public override bool Enabled
        {
            get
            {
                if (m_pSceneHookHelper.Hook == null || m_pSceneHookHelper.Scene == null)
                    return false;
                else
                {
                    ICamera pCamera = (ICamera)m_pSceneHookHelper.Camera;

                    //Disable if orthographic (2D) view
                    if (pCamera.ProjectionType == esri3DProjectionType.esriOrthoProjection)
                        return false;
                    else
                        return true;
                }
            }
        }

        public override void OnCreate(object hook)
        {
            m_pSceneHookHelper.Hook = hook;
        }

        public override void OnClick()
        {
            //Get scene viewer's camera
            ICamera pCamera = (ICamera)m_pSceneHookHelper.Camera;

            //Widen the field of view
            double dAngle;
            dAngle = pCamera.ViewFieldAngle;
            pCamera.ViewFieldAngle = dAngle * 1.1;

            //Redraw the scene viewer
            ISceneViewer pSceneViewer = (ISceneViewer)m_pSceneHookHelper.ActiveViewer;
            pSceneViewer.Redraw(false);
        }
    }
}

[Visual Basic .NET]

ExpandFOV.vb

Imports ESRI.ArcGIS.Analyst3D
Imports ESRI.ArcGIS.ADF.BaseClasses
Imports ESRI.ArcGIS.ADF.CATIDs
Imports ESRI.ArcGIS.Controls
Imports System.Runtime.InteropServices

<ComClass(ExpandFOV.ClassId, ExpandFOV.InterfaceId, ExpandFOV.EventsId)> _
Public NotInheritable Class ExpandFOV
    Inherits BaseCommand

#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 = "3C23D6D3-D211-4F81-A487-2528A78F0E00"
    Public Const InterfaceId As String = "22EE6E86-5517-4ED8-B64F-AC4F42E8E48C"
    Public Const EventsId As String = "A8BC9C14-8BC2-490F-8D6A-0AFAFE8F5391"
#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_pSceneHookHelper As ISceneHookHelper

    ' 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_SceneControl(VB.NET)"
        MyBase.m_caption = "Expand Field of View"
        MyBase.m_toolTip = "Expand Field of View"
        MyBase.m_name = "Sample_SceneControl(VB.NET)/Expand Field of View"
        MyBase.m_message = "Expand the Field of View"

        Dim res() As String = GetType(ExpandFOV).Assembly.GetManifestResourceNames()
        If res.GetLength(0) > 0 Then
            MyBase.m_bitmap = New System.Drawing.Bitmap(GetType(ExpandFOV).Assembly.GetManifestResourceStream("SceneToolsVB.expand.bmp"))
        End If
        m_pSceneHookHelper = New SceneHookHelperClass
    End Sub

    Public Overrides ReadOnly Property Enabled() As Boolean
        Get
            If m_pSceneHookHelper.Hook Is Nothing Or m_pSceneHookHelper.Scene Is Nothing Then
                Return False
            Else
                Dim pCamera As ICamera = CType(m_pSceneHookHelper.Camera, ICamera)

                'Disable if orthographic (2D) view
                If pCamera.ProjectionType = esri3DProjectionType.esriOrthoProjection Then
                    Return False
                Else
                    Return True
                End If
            End If

        End Get
    End Property

    Public Overrides Sub OnCreate(ByVal hook As Object)
        m_pSceneHookHelper.Hook = hook
    End Sub

    Public Overrides Sub OnClick()
        'Get scene viewer's camera
        Dim pCamera As ICamera = CType(m_pSceneHookHelper.Camera, ICamera)

        'Widen the field of view
        Dim dAngle As Double
        dAngle = pCamera.ViewFieldAngle
        pCamera.ViewFieldAngle = dAngle * 1.1

        'Redraw the scene viewer
        Dim pSceneViewer As ISceneViewer = CType(m_pSceneHookHelper.ActiveViewer, ISceneViewer)
        pSceneViewer.Redraw(False)
    End Sub
End Class