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import Gaffer
import GafferUI

class OptionalValuePlugValueWidget( GafferUI.PlugValueWidget ) :

	def __init__( self, plugs, **kw ) :

		self.__row = GafferUI.ListContainer( GafferUI.ListContainer.Orientation.Horizontal, spacing = 4 )

		GafferUI.PlugValueWidget.__init__( self, self.__row, plugs )

		self.__row.append(
			GafferUI.BoolPlugValueWidget(
				{ plug["enabled"] for plug in self.getPlugs() },
				displayMode = GafferUI.BoolWidget.DisplayMode.Switch,
			),
			verticalAlignment = GafferUI.Label.VerticalAlignment.Top
		)

		self.__row.append(
			GafferUI.PlugValueWidget.create( { plug["value"] for plug in self.getPlugs() } ),
			expand = True,
		)

	def setPlugs( self, plugs ) :

		GafferUI.PlugValueWidget.setPlugs( self, plugs )

		self.__row[0].setPlugs( { plug["enabled"] for plug in self.getPlugs() } )
		self.__row[1].setPlugs( { plug["value"] for plug in self.getPlugs() } )

	def childPlugValueWidget( self, childPlug ) :

		for w in self.__row :
			if childPlug in w.getPlugs() :
				return w

		return None

	@staticmethod
	def _valuesForUpdate( plugs, auxiliaryPlugs ) :

		return [ p["enabled"].getValue() for p in plugs ]

	def _updateFromValues( self, values, exception ) :

		self.__row[1].setEnabled( all( values ) )

GafferUI.PlugValueWidget.registerType( Gaffer.OptionalValuePlug, OptionalValuePlugValueWidget )
