ArcObjects Library Reference (Editor)

ITraverseWindow Interface

Provides access to members that interact with the Traverse Window dialog. Note: the ITraverseWindow interface has been superseded byITraverseWindow2. Please consider using the more recent version.

Product Availability

Available with ArcGIS Desktop.

Members

	Name	Description
	Add	Add the course that is defined by the current course parameters.
	Course	A reference to the ith course.
	CourseCount	The number of courses in the traverse.
	CourseType	The type of the course being added.
	CurveDirectionType	If the course type is esriCTCurve, defines the direction type of the curve.
	CurveParameter	If the course type is esriCTCurve or esriCTTangentCurve, describes the type of curve paramater that the ith measure text represents.
	FinishPoint	The specified end point of the traverse.
	IsAddEnabled	Indicates if the Add command on the Traverse Window dialog is enabled.
	MeasureHWND	The handle of the ith measure text control.
	MeasureSelected	Indicates if the text in the ith measure is selected.
	MeasureText	The ith value that defines the course to add.
	SetFocusToMeasure	Change the focus to the ith measure text control.
	StartPoint	The specified start point of the traverse.
	TurnDirection	If the course type is esriCTCurve or esriCTTangentCurve, indicates if the curve turns to the left or right.
	Visible	Indicates if Traverse Window is visible.

CoClasses that implement ITraverseWindow

CoClasses and Classes	Description
TraverseWindow	Dialog for creating traverses.

Remarks

ITraverseWindow allows courses to be added to the existing traverse within the Traverse dialog. A current workspace must be being edited for the Traverse dialog to be enabled. Also the current edit layer must be either a Polyline or a Polygon.

The type of course being added to the traverse depends on the CourseType. The esriCTDirectionDistance and esriCTAngleDistance courses create line segments, the esriCTCurve and esriCTTangentCurve courses create circular arc segments. The courses are defined by text values within the MeasureText, CurveParameter, CurveDirectionType and TurnDirection properties.

When the course type is DirectionDistance, MeasureText(0) is the direction of the course and MeasureText(1) is the distance of the course. For a course type of AngleDistance, MeasureText(0) is the clockwise angle between the previous segment and the new segment and MeasureText(1) is the distance of the line segment. For both the TangentCurve and Curve course types, MeasureText(0) is a text value representing the appropriate curve parameter defined by CurveParameter(0) and MeasureText(1) is a text value representing the appropriate curve parameter defined by CurveParameter(1). Any two of the CurveParameters are required to create a circular arc including Chord Length, Arc Length, Delta Angle or Radius. The TurnDirection is also required to indicate if the curve turns to the left or right If the course type is Curve, a text value in MeasureText(2) and CurveDirectionType define the direction of the curve.

Once all of the parameters have been set for a course, IsAddEnabled will test if the values are correct. Add is used to create a new course. The StartPoint needs to be set before any courses can be added. An optional FinishPoint can exist for the traverse.

All Directions and Angles are in the current units specified within the Editor options. Distances are in the current data frame map units, however they can also be entered with an appropriate suffix that specifies the length units. Refer to the IDistanceConverter for more on the converting distances.

To interact with specific controls on the Traverse Window dialog, the MeasureSelected, MeasureHWND and SetFocusToMeasure methods are used.

[C#]

The following code adds various courses to the Traverse Window dialog.

public void AddCoursesToTraverseWindow()
{
  //You can get app from ICommand :: OnCreate() hook parameter
  UID editorUid=new UIDClass();
  editorUid.Value="esriEditor.Editor";
  IEditor editor=app.FindExtensionByCLSID(editorUid) as IEditor;

  //Get a reference to the traverse window
  UID extUid=new UIDClass();
  extUid.Value="esriEditor.TraverseWindow";
  ITraverseWindow traverseWindow=editor.FindExtension(extUid) as ITraverseWindow;

  //Make the TraverseWindow visible
  if (!traverseWindow.Visible)
    traverseWindow.Visible=true;

  //Make sure the start point exists
  if (traverseWindow.StartPoint == null)
  {
    System.Windows.Forms.MessageBox.Show("Need to add a start point.");
    return;
  }

  //Change the editor properties to quadrant bearing
  IEditProperties2 editProp=editor as IEditProperties2;
  editProp.DirectionType=esriDirectionType.esriDTQuadrantBearing;
  editProp.DirectionUnits=esriDirectionUnits.esriDUDegreesMinutesSeconds;
  editProp.AngularUnitPrecision=0;

  //Add a DirectionDistance course
  traverseWindow.CourseType=esriCourseType.esriCTDirectionDistance;
  traverseWindow.set_MeasureText(0, "N23-55-10E");
  traverseWindow.set_MeasureText(1, "25.87");
  if (traverseWindow.IsAddEnabled == true)
    traverseWindow.Add();

  //Add an AngleDistance course
  traverseWindow.CourseType=esriCourseType.esriCTAngleDistance;
  traverseWindow.set_MeasureText(0, "75-20");
  traverseWindow.set_MeasureText(1, "30.7");
  if (traverseWindow.IsAddEnabled == true)
    traverseWindow.Add();

  //Add a TangentCurve course
  traverseWindow.CourseType=esriCourseType.esriCTTangentCurve;
  //First curve parameter is an arc length
  traverseWindow.set_CurveParameter(0, esriCurveParameter.esriCPArc);
  traverseWindow.set_MeasureText(0, "39.0");
  //Second curve parameter is a radius
  traverseWindow.set_CurveParameter(1, esriCurveParameter.esriCPRadius);
  traverseWindow.set_MeasureText(1, "50");
  //The curve turns to the left
  traverseWindow.TurnDirection=esriTurnDirection.esriTDLeft;
  if (traverseWindow.IsAddEnabled == true)
    traverseWindow.Add();

  //Add a Curve course
  traverseWindow.CourseType=esriCourseType.esriCTCurve;
  //First curve parameter is a delta angle
  traverseWindow.set_CurveParameter(0, esriCurveParameter.esriCPAngle);
  traverseWindow.set_MeasureText(0, "45-30");
  // Second curve parameter is a chord length
  traverseWindow.set_CurveParameter(1, esriCurveParameter.esriCPChord);
  traverseWindow.set_MeasureText(1, "29.3");
  //Set the direction of the curve to be the radial direction
  traverseWindow.CurveDirectionType=esriCurveDirectionType.esriCDTRadial;
  traverseWindow.set_MeasureText(2, "S60-44W");
  //The curve turns to the right
  traverseWindow.TurnDirection=esriTurnDirection.esriTDRight;
  if (traverseWindow.IsAddEnabled == true)
    traverseWindow.Add();

  // Report the courses that have just been added
  if (traverseWindow.CourseCount > 0)
  {
    string courses="";
    for (int count=0; count < traverseWindow.CourseCount; count++)
      courses += traverseWindow.get_Course(count).GetDescription(editor) + "\n";
    System.Windows.Forms.MessageBox.Show(traverseWindow.CourseCount + " Courses " + "\n" + courses);
  }
}

[Visual Basic .NET]

The following code adds various courses to the Traverse Window dialog.

Public Sub AddCoursesToTraverseWindow()
    'You can get app from ICommand :: OnCreate() hook parameter
    Dim editorUid As UID=New UIDClass()
    editorUid.Value="esriEditor.Editor"
    Dim editor As IEditor=TryCast(app.FindExtensionByCLSID(editorUid), IEditor)

    'Get a reference to the traverse window
    Dim extUid As UID=New UIDClass()
    extUid.Value="esriEditor.TraverseWindow"
    Dim traverseWindow As ITraverseWindow=TryCast(editor.FindExtension(extUid), ITraverseWindow)

    'Make the TraverseWindow visible
    If Not traverseWindow.Visible Then
      traverseWindow.Visible=True
    End If

    'Make sure the start point exists
    If traverseWindow.StartPoint Is Nothing Then
      System.Windows.Forms.MessageBox.Show("Need to add a start point.")
      Return
    End If

    'Change the editor properties to quadrant bearing
    Dim editProp As IEditProperties2=TryCast(editor, IEditProperties2)
    editProp.DirectionType=esriDirectionType.esriDTQuadrantBearing
    editProp.DirectionUnits=esriDirectionUnits.esriDUDegreesMinutesSeconds
    editProp.AngularUnitPrecision=0

    'Add a DirectionDistance course
    traverseWindow.CourseType=esriCourseType.esriCTDirectionDistance
    traverseWindow.MeasureText(0)="N23-55-10E"
    traverseWindow.MeasureText(1)="25.87"
    If traverseWindow.IsAddEnabled=True Then
      traverseWindow.Add()
    End If

    'Add an AngleDistance course
    traverseWindow.CourseType=esriCourseType.esriCTAngleDistance
    traverseWindow.MeasureText(0)="75-20"
    traverseWindow.MeasureText(1)="30.7"
    If traverseWindow.IsAddEnabled=True Then
      traverseWindow.Add()
    End If

    'Add a TangentCurve course
    traverseWindow.CourseType=esriCourseType.esriCTTangentCurve
    'First curve parameter is an arc length
    traverseWindow.CurveParameter(0)=esriCurveParameter.esriCPArc
    traverseWindow.MeasureText(0)="39.0"
    'Second curve parameter is a radius
    traverseWindow.CurveParameter(1)=esriCurveParameter.esriCPRadius
    traverseWindow.MeasureText(1)="50"
    'The curve turns to the left
    traverseWindow.TurnDirection=esriTurnDirection.esriTDLeft
    If traverseWindow.IsAddEnabled=True Then
      traverseWindow.Add()
    End If

    'Add a Curve course
    traverseWindow.CourseType=esriCourseType.esriCTCurve
    'First curve parameter is a delta angle
    traverseWindow.CurveParameter(0)=esriCurveParameter.esriCPAngle
    traverseWindow.MeasureText(0)="45-30"
    ' Second curve parameter is a chord length
    traverseWindow.CurveParameter(1)=esriCurveParameter.esriCPChord
    traverseWindow.MeasureText(1)="29.3"
    'Set the direction of the curve to be the radial direction
    traverseWindow.CurveDirectionType=esriCurveDirectionType.esriCDTRadial
    traverseWindow.MeasureText(2)="S60-44W"
    'The curve turns to the right
    traverseWindow.TurnDirection=esriTurnDirection.esriTDRight
    If traverseWindow.IsAddEnabled=True Then
      traverseWindow.Add()
    End If

    ' Report the courses that have just been added
    If traverseWindow.CourseCount > 0 Then
      Dim courses As String=""
      Dim count As Integer
      For count=0 To traverseWindow.CourseCount - 1 Step count + 1
        courses += traverseWindow.Course(count).GetDescription(editor) + "\n"
      Next
      System.Windows.Forms.MessageBox.Show(traverseWindow.CourseCount + " Courses " + "\n" + courses)
    End If
  End Sub