Update app.py

app.py

@@ -1,59 +1,20 @@
-import ee
-import geemap
-from shiny import App, reactive, render, ui
-from shinywidgets import output_widget, render_widget
-from faicons import icon_svg
-
-geemap.ee_initialize(service_account=True)
-
-app_ui = ui.page_sidebar(
-    ui.sidebar(
-        ui.input_action_button(
-            'button',
-            'Generate map',
-            icon = icon_svg('play')
-        )
-    ),
-    ui.layout_column_wrap(
-       output_widget('result')
-    ),
-    title    = "Test geemap",
-    fillable = True,
-)
-
-
-def server(input, output, session):
-
-    @reactive.calc
-    @reactive.event(input.button)
-    def generate_map():
-
-        Map = geemap.Map(center=[40, -100], zoom=4)
-        
-        landsat7 = (
-              ee.Image('LANDSAT/LE7_TOA_5YEAR/1999_2003')
-              .select(['B1', 'B2', 'B3', 'B4', 'B5', 'B7'])
-        )
-        
-        landsat_vis = {'bands': ['B4', 'B3', 'B2'], 'gamma': 1.4}
-        
-        Map.addLayer(landsat7, landsat_vis, "Landsat")
-        
-        hyperion = ee.ImageCollection('EO1/HYPERION').filter(ee.Filter.date('2016-01-01', '2017-03-01'))
-        
-        hyperion_vis = {
-             'min': 1000.0,
-             'max': 14000.0,
-             'gamma': 2.5,
-             }
-        Map.addLayer(hyperion, hyperion_vis, 'Hyperion')
-
-        return Map
-    
-    @output
-    @render_widget
-    def result():
-        return generate_map()
-
-
-app = App(app_ui, server)
+from shiny import reactive
+from shiny.express import input, ui
+from shinywidgets import render_widget
+import ipyleaflet as ipyl
+
+city_centers = {
+    "London": (51.5074, 0.1278),
+    "Paris": (48.8566, 2.3522),
+    "New York": (40.7128, -74.0060)
+}
+
+ui.input_select("center", "Center", choices=list(city_centers.keys()))
+
+@render_widget
+def map():
+    return ipyl.Map(zoom=4)
+
+@reactive.effect
+def _():
+    map.widget.center = city_centers[input.center()]