The second trick was to do with how to access instance parameters of components in a repeater - I had already worked out one method for doing this, but Helen showed us a second way. This concept has led me to analyse what exactly is happening with components in repeaters.
What happens to the original component when a Repeater is created?When you select an adaptive component (or several) and turn it into a repeater, the original component disappears and new copies of it are created in a pattern. You can select the whole repeater as one element, or you can tab-select individual components within a repeater. When you select one of the components in a repeater, you will notice that it does not display all its normal instance parameters in the properties palette (or they may be grayed out) - so you cannot change its Mark, Comment or user defined parameters. More of that later.
In the mass family editor (in-place or external), if you check the element IDs of two adjacent components within a repeater you will notice that they are not consecutive numbers - there will be a gap in the numbers. eg. ID# 85340 and ID# 85342.
Interestingly, if your repeater adaptive components are "Shared" and your mass family is In-Place, you can tab-select the components when not in mass edit mode - Revit will give you a different set of IDs, and these will be consecutive. So that means that each component within a repeater has 3 element IDs - The mystery deepens.
Instance ParametersThere are also some interesting variations as to when you can or cannot see the instance parameters of selected components within a repeater:
- If you select a component in the external mass family editor, it will normally display the type selector as "Default Component", and its instance system parameters (Mark & Comments) will be hidden (except for "Flip").
- If you edit an in-place mass family in a project, and select one of the components in a repeater, it displays nothing in the Type Selector, and it displays user defined instance parameters, but not the system parameters (Mark & Comments).
- If you are not in mass edit mode and you select a (shared) component within a repeater within an in-place mass family, you get quite different results again: You can see the system instance parameters - Mark & Comments; you can also change those values (but not the user defined instance parameters).
And that was my trick for accessing the instance parameters of individual components within a repeater!
Helen's trick lets you get at the instance parameters within the external mass family editor:
- Select one of the repeater components - it will list as "Default Component"
- Change its type from the default component to the actual family/type that it was created from (show images). Hey presto, - you can now access its parameters.
- This only works for external families. For an in-place mass family it won't let you change it, sadly.
So, there are 3 different rules depending on the situation. More complex Revit rules to learn!
To make use of this trick, you probably want to change all of the components within a single repeater. But it is tricky to select them all in one go. More of that in another post on this subject. . . . . Refer to Selecting Individual Components in a Repeater