basic implementation of mouseover marker

* only used in spectrum profile viewers
* currently ALWAYS on

jdaviz/configs/imviz/plugins/coords_info/coords_info.py

@@ -1,7 +1,9 @@
 from traitlets import Bool, Unicode
 
+from jdaviz.configs.specviz.plugins.viewers import SpecvizProfileView
 from jdaviz.core.registries import tool_registry
 from jdaviz.core.template_mixin import TemplateMixin
+from jdaviz.core.marks import PluginScatter
 
 __all__ = ['CoordsInfo']
 
@@ -23,6 +25,29 @@ class CoordsInfo(TemplateMixin):
     unreliable_world = Bool(False).tag(sync=True)
     unreliable_pixel = Bool(False).tag(sync=True)
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._marks = {}
+        # initialize marks (this plugin doesn't open so won't create marks on open)
+        self.marks
+
+    @property
+    def marks(self):
+        """
+        Access the marks created by this plugin.
+        """
+        if self._marks:
+            # TODO: replace with cache property?
+            return self._marks
+
+        # create marks for each of the spectral viewers (will need a listener event to create marks
+        # for new viewers if dynamic creation of spectral viewers is ever supported)
+        for id, viewer in self.app._viewer_store.items():
+            if isinstance(viewer, SpecvizProfileView):
+                self._marks[id] = PluginScatter(viewer, visible=False)
+                viewer.figure.marks = viewer.figure.marks + [self._marks[id]]
+        return self._marks
+
     def reset_coords_display(self):
         self.world_label_prefix = '\u00A0'
         self.world_label_prefix_2 = '\u00A0'

jdaviz/configs/specviz/plugins/viewers.py

@@ -118,6 +118,7 @@ def on_mouse_or_key_event(self, data):
                 self.label_mouseover.pixel = ""
                 self.label_mouseover.reset_coords_display()
                 self.label_mouseover.value = ""
+                self.label_mouseover.marks[self._reference_id].visible = False
                 return
 
             fmt = 'x={:0' + str(closest_maxsize) + '.1f}'
@@ -130,12 +131,15 @@ def on_mouse_or_key_event(self, data):
             self.label_mouseover.world_dec_deg = closest_flux.unit.to_string()
             self.label_mouseover.icon = closest_label
             self.label_mouseover.value = ""  # Not used
+            self.label_mouseover.marks[self._reference_id].update_xy([closest_wave.value], [closest_flux.value])
+            self.label_mouseover.marks[self._reference_id].visible = True
 
         elif data['event'] == 'mouseleave' or data['event'] == 'mouseenter':
             self.label_mouseover.icon = ""
             self.label_mouseover.pixel = ""
             self.label_mouseover.reset_coords_display()
             self.label_mouseover.value = ""
+            self.label_mouseover.marks[self._reference_id].visible = False
 
     def _expected_subset_layer_default(self, layer_state):
         super()._expected_subset_layer_default(layer_state)

jdaviz/core/marks.py

@@ -13,7 +13,7 @@
 
 __all__ = ['OffscreenLinesMarks', 'BaseSpectrumVerticalLine', 'SpectralLine',
            'SliceIndicatorMarks', 'ShadowMixin', 'ShadowLine', 'ShadowLabelFixedY',
-           'PluginLine',
+           'PluginLine', 'PluginScatter',
            'LineAnalysisContinuum', 'LineAnalysisContinuumCenter',
            'LineAnalysisContinuumLeft', 'LineAnalysisContinuumRight',
            'LineUncertainties', 'ScatterMask', 'SelectedSpaxel']
@@ -484,19 +484,31 @@ def _on_shadowing_changed(self, change):
             self._update_align()
 
 
-class PluginLine(Lines, HubListener):
-    def __init__(self, viewer, x=[], y=[], **kwargs):
-        # color is same blue as import button
-        super().__init__(x=x, y=y, colors=["#007BA1"], scales=viewer.scales, **kwargs)
-
+class PluginMark():
     def update_xy(self, x, y):
         self.x = np.asarray(x)
         self.y = np.asarray(y)
 
+    def append_xy(self, x, y):
+        self.x = np.append(self.x, x)
+        self.y = np.append(self.y, y)
+
     def clear(self):
         self.update_xy([], [])
 
 
+class PluginLine(Lines, PluginMark, HubListener):
+    def __init__(self, viewer, x=[], y=[], **kwargs):
+        # color is same blue as import button
+        super().__init__(x=x, y=y, colors=["#007BA1"], scales=viewer.scales, **kwargs)
+
+
+class PluginScatter(Scatter, PluginMark, HubListener):
+    def __init__(self, viewer, x=[], y=[], **kwargs):
+        # color is same blue as import button
+        super().__init__(x=x, y=y, colors=["#007BA1"], scales=viewer.scales, **kwargs)
+
+
 class LineAnalysisContinuum(PluginLine):
     pass