void OnDocumentChanged(
object sender,
DocumentChangedEventArgs e)
{
ICollection <ElementId> idsAdded
= e.GetAddedElementIds();
int n = idsAdded.Count;
Debug.Print("{0} id{1} added.",
n, Util.PluralSuffix(n));
// This does not work, because the handler will
// be called each time a new instance is added,
// overwriting the previous ones recorded:
//_added_element_ids = e.GetAddedElementIds();
_added_element_ids.AddRange(idsAdded);
if (_place_one_single_instance_then_abort &&
0 < n)
{
// Why do we send the WM_KEYDOWN message twice?
// I tried sending it once only, and that does
// not work. Maybe the proper thing to do would
// be something like the Press.OneKey method...
//
//Press.OneKey( _revit_window.Handle,
// (char) Keys.Escape );
//
// Nope, that did not work.
//
// Answer: When you place instances with
// PromptForFamilyInstancePlacement, the previous
// one remains selected just until you drop the
// next one. The first esc key hit removes that
// selection while still allowing you to continue
// adding instances to the model. Only a second
// esc hit aborts the command.
//Press.PostMessage( _revit_window.Handle,
// (uint) Press.KEYBOARD_MSG.WM_KEYDOWN,
// (uint) Keys.Escape, 0 ); // 2018
//Press.PostMessage( _revit_window.Handle,
// (uint) Press.KEYBOARD_MSG.WM_KEYDOWN,
// (uint) Keys.Escape, 0 ); // 2018
Press.PostMessage(_revit_window,
(uint)Press.KEYBOARD_MSG.WM_KEYDOWN,
(uint)Keys.Escape, 0); // 2019
Press.PostMessage(_revit_window,
(uint)Press.KEYBOARD_MSG.WM_KEYDOWN,
(uint)Keys.Escape, 0); // 2019
}
}
/// <summary>
/// Here is a part or our code to start a Revit command.
/// The aim of the code is to set a wall type current in the Revit property window.
/// We only start up the wall command with the API and let the user do the drawing of the wall.
/// This solution can also be used to launch other Revit commands.
/// </summary>
public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Application app = uiapp.Application;
Document doc = uidoc.Document;
// name of target wall type that we want to use:
string wallTypeName = "Generic - 203";
WallType wallType = GetFirstWallTypeNamed(
doc, wallTypeName);
Wall wall = GetFirstWallUsingType(
doc, wallType);
// select the wall in the UI
uidoc.Selection.Elements.Add(wall);
if (0 == uidoc.Selection.Elements.Size)
{
// no wall with the correct wall type found
FilteredElementCollector collector
= new FilteredElementCollector(doc);
Level ll = collector
.OfClass(typeof(Level))
.FirstElement() as Level;
// place a new wall with the
// correct wall type in the project
//Line geomLine = app.Create.NewLineBound( XYZ.Zero, new XYZ( 2, 0, 0 ) ); // 2013
Line geomLine = Line.CreateBound(XYZ.Zero, new XYZ(2, 0, 0)); // 2014
Transaction t = new Transaction(
doc, "Create dummy wall");
t.Start();
//Wall nw = doc.Create.NewWall( geomLine, // 2012
// wallType, ll, 1, 0, false, false );
Wall nw = Wall.Create(doc, geomLine, // 2013
wallType.Id, ll.Id, 1, 0, false, false);
t.Commit();
// Select the new wall in the project
uidoc.Selection.Elements.Add(nw);
// Start command create similar. In the
// property menu, our wall type is set current
Press.Keys("CS");
// select the new wall in the project,
// so we can delete it
uidoc.Selection.Elements.Add(nw);
// erase the selected wall (remark:
// doc.delete(nw) may not be used,
// this command will undo)
Press.Keys("DE");
// start up wall command
Press.Keys("WA");
}
else
{
// the correct wall is already selected:
Press.Keys("CS"); // start "create similar"
}
return(Result.Succeeded);
}