From c4f543cd7de8eae17ad10124976f9724c6fd0d21 Mon Sep 17 00:00:00 2001
From: Kyle Conroy <kyleconroy@gmail.com>
Date: Thu, 22 Aug 2024 09:25:51 -0400
Subject: [PATCH 1/2] disable density map image broadcast

---
 glue_jupyter/bqplot/scatter/layer_artist.py         | 1 +
 glue_jupyter/bqplot/scatter/scatter_density_mark.py | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/glue_jupyter/bqplot/scatter/layer_artist.py b/glue_jupyter/bqplot/scatter/layer_artist.py
index 6434f052..a334676a 100644
--- a/glue_jupyter/bqplot/scatter/layer_artist.py
+++ b/glue_jupyter/bqplot/scatter/layer_artist.py
@@ -146,6 +146,7 @@ def __init__(self, view, viewer_state, layer_state=None, layer=None):
             vmin=self.density_auto_limits.min,
             vmax=self.density_auto_limits.max,
             histogram2d_func=self.compute_density_map,
+            visible=False
         )
 
         self.view.figure.marks = list(self.view.figure.marks) + [
diff --git a/glue_jupyter/bqplot/scatter/scatter_density_mark.py b/glue_jupyter/bqplot/scatter/scatter_density_mark.py
index cdccbf58..0126b172 100644
--- a/glue_jupyter/bqplot/scatter/scatter_density_mark.py
+++ b/glue_jupyter/bqplot/scatter/scatter_density_mark.py
@@ -69,6 +69,7 @@ def __init__(
         stretch=None,
         dpi=None,
         external_padding=None,
+        visible=True,
     ):
 
         # FIXME: need to use weakref to avoid circular references
@@ -91,6 +92,7 @@ def __init__(
         self.vmin = vmin
         self.vmax = vmax
         self.stretch = stretch
+        self.visible = visible
 
         if dpi is not None:
             self.dpi = dpi
@@ -194,7 +196,7 @@ def _update_counts(self, *args, **kwargs):
 
     def _update_rendered_image(self, *args, **kwargs):
 
-        if self._counts is None:
+        if self._counts is None or not self.visible:
             self.image = EMPTY_IMAGE
             return
 

From 54499a8ce32ca5248d70e2976ab22c9906f4154a Mon Sep 17 00:00:00 2001
From: Derek Homeier <dhomeie@gwdg.de>
Date: Tue, 27 Aug 2024 15:09:09 +0200
Subject: [PATCH 2/2] Add image update on visibility change

---
 glue_jupyter/bqplot/scatter/scatter_density_mark.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/glue_jupyter/bqplot/scatter/scatter_density_mark.py b/glue_jupyter/bqplot/scatter/scatter_density_mark.py
index 0126b172..e110b757 100644
--- a/glue_jupyter/bqplot/scatter/scatter_density_mark.py
+++ b/glue_jupyter/bqplot/scatter/scatter_density_mark.py
@@ -108,6 +108,7 @@ def __init__(
         self.observe(self._update_rendered_image, "vmin")
         self.observe(self._update_rendered_image, "vmax")
         self.observe(self._update_rendered_image, "stretch")
+        self.observe(self._update_rendered_image, "visible")
 
         self._scale_image = ColorScale()
         self._scales = {