add pyshiny example

examples/pyshiny_example.py

@@ -0,0 +1,26 @@
+from ipymolstar import PDBeMolstar
+from shiny import reactive
+from shiny.express import input, render, ui
+from shinywidgets import reactive_read, render_widget
+
+ui.input_text("molecule_id", "Molecule id", "1qyn")
+
+
+@render_widget
+def molstar():
+    view = PDBeMolstar(molecule_id="1qyn")
+    return view
+
+
+@reactive.effect
+def _():
+    molecule_id = input.molecule_id()
+    # check for valid pdb id
+    if len(molecule_id) == 4:
+        molstar.widget.molecule_id = input.molecule_id()
+
+
+@render.text
+def center():
+    event = reactive_read(molstar.widget, "mouseover_event")
+    return f"Mouseover event: {event}"