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Original file line number	Diff line number	Diff line change
		@@ -1,11 +1,12 @@
		from typing import Any
		from typing import Any, List
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		import numpy as np
		import pygfx

		from fastplotlib.utils import get_colors, map_labels_to_colors

		from abc import ABC, abstractmethod
		from dataclasses import dataclass

		class Graphic:
		def __init__(
Expand Down Expand Up		@@ -91,7 +92,7 @@ def _set_feature(self, name: str, new_data: Any, indices: Any):
		pass

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		@abstractmethod
		def link(self, event: str, feature: Any, feature_data: Any, target: Graphic, target_feature: Any, target_data: Any, indices_mapper: Any):
		def link(self, event: str, target: Graphic, feature: str, new_data: Any, indices_mapper: callable = None):
		# event occurs, causes change in feature of current graphic to data indices from pick_info,
		# also causes change in target graphic to target feature at target data with corresponding or mapped
		# indices based on the indice_mapper function
Expand All		@@ -101,4 +102,14 @@ def link(self, event: str, feature: Any, feature_data: Any, target: Graphic, tar
		# indice mapper takes in source features and maps to target features
		pass

		@abstractmethod
		def event_handler(self, event):
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		pass

		@dataclass
		class EventData:
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		"""Class for keeping track of the info necessary for interactivity after event occurs."""
		def __init__(self, target: Graphic, feature: str, new_data: Any):
		self.target = target
		self.feature = feature
		self.new_data = new_data

17 changes: 9 additions & 8 deletions 17 fastplotlib/graphics/line.py

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -3,6 +3,7 @@
		from typing import *

		from ._base import Graphic
		from ._base import EventData

		class LineGraphic(Graphic):
		def __init__(self, data: np.ndarray, zlevel: float = None, size: float = 2.0, colors: np.ndarray = None, cmap: str = None, args, *kwargs):
Expand All		@@ -24,7 +25,7 @@ def __init__(self, data: np.ndarray, zlevel: float = None, size: float = 2.0, co
		material=material(thickness=size, vertex_colors=True)
		)

		self.events = {}
		self.registered_callbacks = {}
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		def fix_data(self):
		# TODO: data should probably be a property of any Graphic?? Or use set_data() and get_data()
Expand Down Expand Up		@@ -79,13 +80,13 @@ def link(self, event: str, target: Graphic, feature: str, new_data: Any, indices
		else:
		raise ValueError("event not possible")

		if event in self.events.keys():
		self.events[event].append((target, feature, new_data))
		if event in self.registered_callbacks.keys():
		self.registered_callbacks[event].append(EventData(target=target, feature=feature, new_data=new_data))
		else:
		self.events[event] = list()
		self.events[event].append((target, feature, new_data))
		self.registered_callbacks[event] = list()
		self.registered_callbacks[event].append(EventData(target=target, feature=feature, new_data=new_data))

		def event_handler(self, event):
		if event.type in self.events.keys():
		for target_info in self.events[event.type]:
		target_info[0]._set_feature(name=target_info[1], new_data=target_info[2], indices=None)
		if event.type in self.registered_callbacks.keys():
		for target_info in self.registered_callbacks[event.type]:
		target_info.target._set_feature(name=target_info.feature, new_data=target_info.new_data, indices=None)

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