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GeezerVison is showing github.com — `pointer_leave` events `pick_info` always comes from the `Frame` mesh plane · Issue #777 · fastplotlib/fastplotlib

pointer_leave events pick_info always comes from the Frame mesh plane #777

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pointer_leave events pick_info always comes from the Frame mesh plane#777
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@kushalkolar
kushalkolar
opened on Mar 27, 2025
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This is a result of #740 that I did not anticipate 😂 . Anytime we have a pointer_leave event on an object in the Subplot Scene, it will pickup the plane mesh of the subplot Frame for the picking info.

Example, when leaving any one of these scatter points:

<pygfx.objects._events.PointerEvent object at 0x7fa7a40b20d0>
{'rgba': Color(0.8784, 0.8431, 0.098, 1.0), 'world_object': <pygfx.Mesh  at 0x7fa7ff5e1090>, 'face_index': 1, 'face_coord': (0.06349206349206349, 0.6031746031746031, 0.31746031746031744)}

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@almarklein do you think the best thing to do is just filter out the plane mesh anytime it appears in the pick info? In fastplotlib the events handling is wrapped so that's easy to do:

fastplotlib/fastplotlib/graphics/_base.py

Lines 300 to 312 in d97307b

def _handle_event(self, callback, event: pygfx.Event):
"""Wrap pygfx event to add graphic to pick_info"""
event.graphic = self
if self.block_events:
return
if event.type in self._features:
# for feature events
event._target = self.world_object
with log_exception(f"Error during handling {event.type} event"):
callback(event)

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  1. almarklein commented on Mar 27, 2025

    @almarklein
    almarklein
    on Mar 27, 2025
    Collaborator
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    Why is the plane's material.pick_write set to True in the first place?

  2. kushalkolar commented on Mar 27, 2025

    @kushalkolar
    kushalkolar
    on Mar 27, 2025
    MemberAuthor
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    So that it's moveable, #740 (comment)

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