/// <summary>
/// Implement this method as an external command for Revit.
/// </summary>
/// <param name="commandData">An object that is passed to the external application
/// which contains data related to the command,
/// such as the application object and active view.</param>
/// <param name="message">A message that can be set by the external application
/// which will be displayed if a failure or cancellation is returned by
/// the external command.</param>
/// <param name="elements">A set of elements to which the external application
/// can add elements that are to be highlighted in case of failure or cancellation.</param>
/// <returns>Return the status of the external command.
/// A result of Succeeded means that the API external method functioned as expected.
/// Cancelled can be used to signify that the user cancelled the external operation
/// at some point. Failure should be returned if the application is unable to proceed with
/// the operation.</returns>
public virtual Result Execute(ExternalCommandData commandData
, ref string message, ElementSet elements)
{
try
{
Document document = commandData.Application.ActiveUIDocument.Document;
ICollection <ElementId> datums = commandData.Application.ActiveUIDocument.Selection.GetElementIds();
Autodesk.Revit.DB.View view = commandData.Application.ActiveUIDocument.ActiveView;
if (datums == null || datums.Count == 0)
{
return(Result.Cancelled);
}
//// Show UI
using (DatumStyleSetting settingForm = new DatumStyleSetting())
{
if (settingForm.ShowDialog() == DialogResult.OK)
{
using (Transaction tran = new Transaction(document, "StyleModification"))
{
tran.Start();
foreach (ElementId datumRef in datums)
{
DatumPlane datum = document.GetElement(datumRef) as DatumPlane;
if (showLeftBubble)
{
datum.ShowBubbleInView(DatumEnds.End0, view);
}
else
{
datum.HideBubbleInView(DatumEnds.End0, view);
}
if (showRightBubble)
{
datum.ShowBubbleInView(DatumEnds.End1, view);
}
else
{
datum.HideBubbleInView(DatumEnds.End1, view);
}
if (changeLeftEnd2D)
{
datum.SetDatumExtentType(DatumEnds.End0, view, DatumExtentType.ViewSpecific);
}
else
{
datum.SetDatumExtentType(DatumEnds.End0, view, DatumExtentType.Model);
}
if (changeRightEnd2D)
{
datum.SetDatumExtentType(DatumEnds.End1, view, DatumExtentType.ViewSpecific);
}
else
{
datum.SetDatumExtentType(DatumEnds.End1, view, DatumExtentType.Model);
}
if (addLeftElbow && datum.GetLeader(DatumEnds.End0, view) == null)
{
datum.AddLeader(DatumEnds.End0, view);
}
else if (datum.GetLeader(DatumEnds.End0, view) != null)
{
Leader leader = datum.GetLeader(DatumEnds.End0, view);
leader = CalculateLeader(leader, addLeftElbow);
datum.SetLeader(DatumEnds.End0, view, leader);
}
if (addRightElbow && datum.GetLeader(DatumEnds.End1, view) == null)
{
datum.AddLeader(DatumEnds.End1, view);
}
else if (datum.GetLeader(DatumEnds.End1, view) != null)
{
Leader leader = datum.GetLeader(DatumEnds.End1, view);
leader = CalculateLeader(leader, addRightElbow);
datum.SetLeader(DatumEnds.End1, view, leader);
}
}
tran.Commit();
}
}
}
return(Result.Succeeded);
}
catch (Exception ex)
{
message = ex.Message;
return(Result.Failed);
}
}