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Created Design: subflows (markdown)
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A subflow is a set of connected nodes that can be easily referenced and reused within a larger flow.
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A subflow is represented as a single node in the workspace which can be opened up in a tab to see the underlying flow.
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A subflow can be used in one of two modes: (this is tbd. Might just stick with singleton for v1)
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1. Singleton : only one copy of the flow exists.
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2. Instance : each reference to the subflow is its own copy.
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### Creating a subflow
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1. User selects some existing nodes.
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2. Selects 'convert to subflow' option.
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4. Dialog opens to name the subflow.
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3. Nodes are removed from workspace and replaced by a subflow node.
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4. Subflow node added to palette
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**Questions:**
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* how to automatically identify the input/output ports to map to
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* what restrictions should be applied?
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* a single, continuous flow of nodes - aside from comment nodes
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* only one 'left most' node
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### Editing a subflow
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1. Double click subflow node.
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2. Opens in closeable tab containing the flow.
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**Questions:**
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* how to rename the flow? Via subflow sidebar tab?
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* how to pick singleton/instance mode?
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### Delete subflow
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1. Open a subflow sidebar tab that lists all subflows with usage count (cf config node tab - perhaps combine them...?)
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2. ...
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## Definition
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...
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