Hello!

I'm trying to implement a "drain" animation on a health bar, which requires a separate ProgressBar that is rendered one layer below the actual health bar. For brevity's sake, I'll be refering to these as the main and drain bars. The expected behavior is as follows:

• When health is drained, the main bar is immediately updated to the new value, but the drain bar doesn't have its value updated and instead fades out.

• When the fade-out Storyboard completes, the invisible drain bar can now have its value updated to the new value.

• Afterwards, the drain bar keeps getting updated to the health value.

Here are the Interaction Triggers I'm using on the drain bar:
The problem here is that the drain bar value update can only happen when two conditions are met, as neither is sufficient on its own:

• The health value has changed, requiring a PropertyChangedTrigger.

• The HealthBarDrainHideAnimation has finished playing, requiring a StoryboardCompletedTrigger (assuming it doesn't run just once).

Since we can't exactly nest triggers, it seems the only way to run a Storyboard after two conditions are met is to either create a custom C++ event or keep track of the elapsed time since the last drain (e.g. if the fade-out animation takes one second, update the value if more than one second has passed after health was lost). I'm not a Noesis expert, so I thought about posting here to make sure I'm not missing more obvious solutions!

I'm not following exactly which conditions and what actions you need to execute, but there is a way to extend a trigger with more conditions, using the ConditionBehavior. Is this what you're looking for?