About the Create a custom selection extension by extending ArcObjects Sample
[C#]
SelectByLineTool.cs
using System;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Framework;
using ESRI.ArcGIS.ArcMapUI;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
namespace SelectionCOMSample
{
/// <summary>
/// Summary description for SelectByLineTool.
/// </summary>
[Guid("15de72ff-f31f-4655-98b6-191b7348375a")]
[ClassInterface(ClassInterfaceType.None)]
[ProgId("SelectionCOMSample.SelectByLineTool")]
public sealed class SelectByLineTool : BaseTool
{
#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);
MxCommands.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);
MxCommands.Unregister(regKey);
}
#endregion
#endregion
private bool m_isMouseDown = false;
private ESRI.ArcGIS.Display.INewLineFeedback m_lineFeedback;
private SelectionExtension m_mainExtension;
private IMxDocument m_doc;
public SelectByLineTool()
{
base.m_category = "Developer Samples";
base.m_caption = "Select ByLine Tool C#.";
base.m_message = "Select by line tool C#.";
base.m_toolTip = "Select by line tool C#.\r\nSelection Sample Extension needs to be turned on in Extensions dialog.";
base.m_name = "ESRI_SelectionCOMSample_SelectByLineTool";
try
{
base.m_bitmap = new Bitmap(GetType().Assembly.GetManifestResourceStream("SelectionCOMSample.Images.SelectByLine.png"));
base.m_cursor = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream("SelectionCOMSample.Images.SelectByLine.cur"));
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
}
m_mainExtension = SelectionExtension.GetExtension();
}
#region Overriden Class Methods
/// <summary>
/// Occurs when this tool is created
/// </summary>
/// <param name="hook">Instance of the application</param>
public override void OnCreate(object hook)
{
IApplication application = hook as IApplication;
m_doc = application.Document as IMxDocument;
//Disable if it is not ArcMap
if (hook is IMxApplication)
base.m_enabled = true;
else
base.m_enabled = false;
}
/// <summary>
/// Occurs when this tool is clicked
/// </summary>
public override void OnClick()
{
}
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
IActiveView activeView = m_doc.FocusMap as IActiveView;
IPoint point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y) as IPoint;
if (m_lineFeedback == null)
{
m_lineFeedback = new ESRI.ArcGIS.Display.NewLineFeedback();
m_lineFeedback.Display = activeView.ScreenDisplay;
m_lineFeedback.Start(point);
}
else
{
m_lineFeedback.AddPoint(point);
}
m_isMouseDown = true;
}
public override void OnMouseMove(int Button, int Shift, int X, int Y)
{
if (!m_isMouseDown) return;
IActiveView activeView = m_doc.FocusMap as IActiveView;
IPoint point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y) as IPoint;
m_lineFeedback.MoveTo(point);
}
public override void OnDblClick()
{
IActiveView activeView = m_doc.FocusMap as IActiveView;
activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
IPolyline polyline;
if (m_lineFeedback != null)
{
polyline = m_lineFeedback.Stop();
if (polyline != null)
m_doc.FocusMap.SelectByShape(polyline, null, false);
}
activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
m_lineFeedback = null;
m_isMouseDown = false;
}
public override bool Enabled
{
get
{
if (m_mainExtension == null)
return false;
else
return m_mainExtension.HasSelectableLayer() && m_mainExtension.IsExtensionEnabled;
}
}
#endregion
}
}
[Visual Basic .NET]
SelectByLineTool.vb
Imports Microsoft.VisualBasic
Imports System
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports ESRI.ArcGIS.ADF.BaseClasses
Imports ESRI.ArcGIS.ADF.CATIDs
Imports ESRI.ArcGIS.Framework
Imports ESRI.ArcGIS.ArcMapUI
Imports System.Windows.Forms
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.Geometry
Namespace SelectionCOMSample
''' <summary>
''' Summary description for SelectByLineTool.
''' </summary>
<Guid("15de72ff-f31f-4655-98b6-191b7348375a"), ClassInterface(ClassInterfaceType.None), ProgId("SelectionCOMSample.SelectByLineTool")> _
Public NotInheritable Class SelectByLineTool
Inherits BaseTool
#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)
MxCommands.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)
MxCommands.Unregister(regKey)
End Sub
#End Region
#End Region
Private m_isMouseDown As Boolean = False
Private m_lineFeedback As ESRI.ArcGIS.Display.INewLineFeedback
Private m_mainExtension As SelectionExtension
Private m_doc As IMxDocument
Public Sub New()
MyBase.m_category = "Developer Samples"
MyBase.m_caption = "Select ByLine Tool VB.NET."
MyBase.m_message = "Select by line tool VB.NET."
MyBase.m_toolTip = "Select by line tool VB.NET." & Constants.vbCrLf & "Selection Sample Extension needs to be turned on in Extensions dialog."
MyBase.m_name = "ESRI_SelectionCOMSample_SelectByLineTool"
Try
MyBase.m_bitmap = New Bitmap(Me.GetType().Assembly.GetManifestResourceStream("SelectByLine.png"))
MyBase.m_cursor = New System.Windows.Forms.Cursor(Me.GetType().Assembly.GetManifestResourceStream("SelectByLine.cur"))
Catch ex As Exception
System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap")
End Try
m_mainExtension = SelectionExtension.GetExtension()
End Sub
#Region "Overridden Class Methods"
''' <summary>
''' Occurs when this tool is created
''' </summary>
''' <param name="hook">Instance of the application</param>
Public Overrides Sub OnCreate(ByVal hook As Object)
Dim application As IApplication = TryCast(hook, IApplication)
m_doc = TryCast(application.Document, IMxDocument)
'Disable if it is not ArcMap
If TypeOf hook Is IMxApplication Then
MyBase.m_enabled = True
Else
MyBase.m_enabled = False
End If
End Sub
''' <summary>
''' Occurs when this tool is clicked
''' </summary>
Public Overrides Sub OnClick()
End Sub
Public Overrides Sub OnMouseDown(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer)
Dim activeView As IActiveView = TryCast(m_doc.FocusMap, IActiveView)
Dim point As IPoint = TryCast(activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y), IPoint)
If m_lineFeedback Is Nothing Then
m_lineFeedback = New ESRI.ArcGIS.Display.NewLineFeedback()
m_lineFeedback.Display = activeView.ScreenDisplay
m_lineFeedback.Start(point)
Else
m_lineFeedback.AddPoint(point)
End If
m_isMouseDown = True
End Sub
Public Overrides Sub OnMouseMove(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer)
If (Not m_isMouseDown) Then
Return
End If
Dim activeView As IActiveView = TryCast(m_doc.FocusMap, IActiveView)
Dim point As IPoint = TryCast(activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y), IPoint)
m_lineFeedback.MoveTo(point)
End Sub
Public Overrides Sub OnDblClick()
Dim activeView As IActiveView = TryCast(m_doc.FocusMap, IActiveView)
activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, Nothing, Nothing)
Dim polyline As IPolyline
If m_lineFeedback IsNot Nothing Then
polyline = m_lineFeedback.Stop()
If polyline IsNot Nothing Then
m_doc.FocusMap.SelectByShape(polyline, Nothing, False)
End If
End If
activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, Nothing, Nothing)
m_lineFeedback = Nothing
m_isMouseDown = False
End Sub
Public Overrides ReadOnly Property Enabled() As Boolean
Get
If m_mainExtension Is Nothing Then
Return False
Else
Return m_mainExtension.HasSelectableLayer() AndAlso m_mainExtension.IsExtensionEnabled
End If
End Get
End Property
#End Region
End Class
End Namespace