Example files for Expand / Collapse String Parameter video
Used to control parameter visibility.
Hide When Expression
{ expanded == 1 }
Hide When Expression (multiparm)
{ expanded# == 1 }
Callback function that controls our parameter reference switching.
# Toggle Expand (single)
def toggle_expand(node):
collapsed = node.parm("note_collapsed")
expanded = node.parm("note_expanded")
parms = [collapsed, expanded]
if node.evalParm("expanded"):
parms.reverse()
parms[0].deleteAllKeyframes()
parms[1].deleteAllKeyframes()
parms[1].set(parms[0])
toggle_expand(kwargs["node"])# Toggle Expand (multiparm, Python 2.7+)
def toggle_expand(node, parm_index):
collapsed = node.parm("note_collapsed" + str(parm_index))
expanded = node.parm("note_expanded" + str(parm_index))
parms = [collapsed, expanded]
if node.evalParm("expanded" + str(parm_index)):
parms.reverse()
parms[0].deleteAllKeyframes()
parms[1].deleteAllKeyframes()
parms[1].set(parms[0])
toggle_expand(kwargs["node"], kwargs["script_multiparm_index"])# Toggle Expand (multiparm, Python 3)
def toggle_expand(node, parm_index):
collapsed = node.parm(f"note_collapsed{parm_index}")
expanded = node.parm(f"note_expanded{parm_index}")
parms = [collapsed, expanded]
if node.evalParm(f"expanded{parm_index}"):
parms.reverse()
parms[0].deleteAllKeyframes()
parms[1].deleteAllKeyframes()
parms[1].set(parms[0])
toggle_expand(kwargs["node"], kwargs["script_multiparm_index"])Nice UI element that controls the state of the expanded toggle.
# Action Button
parm = kwargs["node"].parm("expanded")
parm.set(1)
parm.pressButton()# Action Button (multiparm, Python 2.7+)
idx = kwargs["script_multiparm_index"]
parm = kwargs["node"].parm("expanded" + str(idx))
parm.set(0)
parm.pressButton()# Action Button (multiparm, Python 3)
idx = kwargs["script_multiparm_index"]
parm = kwargs["node"].parm(f"expanded{idx}")
parm.set(1)
parm.pressButton()chs("note_collapsed#")
Petr Zloty left a very handy comment on Vimeo demonstrating how
you can expand/collapse a parm using only the Action Button only by
modifying the parmTemplate. This solution is simple and elegant,
and better overall for single parameters. However, this method will
not work for individual multiparms since modifying the parmTemplate
for one modifies them all which is something I wanted to avoid.
# current node
node = kwargs['node']
# current parameter
pt = kwargs["parmtuple"]
# its template
template = pt.parmTemplate()
# parameter's tags
tags = template.tags()
# invert collapsed tag
tags['editor'] = str(1-int(tags['editor']))
# invert icon
tags['script_action_icon'] = "KEYS_Up" if tags['script_action_icon'] == "KEYS_Down" else "KEYS_Down"
# set updated tags
template.setTags(tags)
# replace parameter template with updated tags
group = node.parmTemplateGroup()
group.replace(pt.name(), template)
node.setParmTemplateGroup(group)
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