UDT Member Name on Custom Trend

Ignition
,
12

Thanks. I was able to work one out on my own.

def customChartTagsDropped(self, paths):
	#headers - for reference
	#headers = [	'NAME',					'TAG_PATH',				'AGGREGATION_MODE',	'AXIS',			'SUBPLOT',
	#				'ENABLED',				'COLOR',				'DASH_PATTERN',		'RENDER_STYLE',	'LINE_WEIGHT',
	#				'SHAPE',				'FILL_SHAPE',			'LABELS',			'GROUP_NAME',	'DIGITAL',
	#				'OVERRIDE_AUTOCOLOR',	'HIDDEN',				'USER_SELECTABLE',	'SORT_ORDER',	'USER_REMOVABLE'
	#			]
				
	#default row - configure as desired for default trend appearance
	defaultRow = [		'Name',				'[Provider]Path',		'MinMax',			'Default Axis',	1,
						True,				'color(255,0,0,255)',	'',					0,				1,
						0,					True,					False,				'',				False,
						False,				False,					True,				'',				True
				 ]
	
	#initialize empty tagPaths list
	tagPaths = []
	tagNamePaths = []
	
	#for each path in the list of dropped tags
	for path in paths:
	
		#each tag provider is formatted as "area_xx" find the first occurance of the tag provider name
		pathStartIndex = path.find("area_")
		
		#check for tag in the default provider if the "area" provider is not found
		if pathStartIndex == -1:
			pathStartIndex = path.find("default")
		
		#make sure provider was found
		if pathStartIndex != -1:
		
			#get the tag path from the proivder to the end and format to read the custom PenName property from the tag
			tagPath = "["+path[pathStartIndex:]+'.PenName'
			tagNamePath = "["+path[pathStartIndex:]+'.Name'
			
			#add the tagPath to the list
			tagPaths.append(tagPath)
			tagNamePaths.append(tagNamePath)
			
		#tag provider not found, append empty string to keep accurate parallel lists
		else:
			tagPaths.append('')
			
	penNames = system.tag.readBlocking(tagPaths)
	tagNames = system.tag.readBlocking(tagNamePaths)
	
	#for each pen name in the list of read pen names
	for count, penName in enumerate(penNames):
	
		#skip any tags where the provider was not found
		if tagPaths[count] != '':
		
			#create default row
			newRow = defaultRow
			
			#if PenName custom prop does not exist or is empty
			if penName.quality.isBad() or penName.value is None or str(penName.value) == '':
			
				#assign tag name row name
				newRow[0] = tagNames[count].value
				
			#good PenName found
			else:
			
				#assign PenName to row name
				newRow[0] = str(penName.value)
				
			#assign history path to row path
			newRow[1] = paths[count]
			
			#update tagPens with the new row
			self.tagPens = system.dataset.addRow(self.tagPens, self.tagPens.rowCount, newRow)

This script relies on the trended tag to have a custom PenName property that is used for the name. If it doesn't exist or is blank the tag name is used instead.

One way to improve this would be to create the PenName prop if it doesn't exist and prompt the user to fill it in, but most/all of the trended tags are part of a UDT so that could get hairy.