Port 'Map' demo to Python

demos/Map/main.py

@@ -0,0 +1,82 @@
+import gi
+
+gi.require_version("Gtk", "4.0")
+gi.require_version("Shumate", "1.0")
+from gi.repository import Gtk, Shumate, GObject
+import workbench
+import math
+
+GObject.type_ensure(Shumate.SimpleMap)
+map_widget = workbench.builder.get_object("map_widget")
+registry = Shumate.MapSourceRegistry.new_with_defaults()
+
+# Use OpenStreetMap as the source
+map_source = registry.get_by_id(Shumate.MAP_SOURCE_OSM_MAPNIK)
+viewport = map_widget.get_viewport()
+
+map_widget.set_map_source(map_source)
+map_widget.get_map().center_on(0, 0)
+
+# Reference map source used by MarkerLayer
+viewport.set_reference_map_source(map_source)
+viewport.set_zoom_level(5)
+
+marker_layer = Shumate.MarkerLayer(
+    viewport=viewport,
+    selection_mode=Gtk.SelectionMode.SINGLE,
+)
+
+marker = workbench.builder.get_object("marker")
+marker.set_location(0, 0)
+marker_layer.add_marker(marker)
+map_widget.get_map().add_layer(marker_layer)
+
+gesture = Gtk.GestureClick()
+map_widget.add_controller(gesture)
+
+button_marker = workbench.builder.get_object("button_marker")
+
+
+def on_gesture_pressed(_self, _n_press, x, y):
+    if button_marker.get_active():
+        location = viewport.widget_coords_to_location(map_widget, x, y)
+        marker.set_location(location[0], location[1])
+        print(f"Marker placed at {location[0]}, {location[1]}")
+
+
+gesture.connect("pressed", on_gesture_pressed)
+
+
+entry_latitude = workbench.builder.get_object("entry_latitude")
+entry_longitude = workbench.builder.get_object("entry_longitude")
+button_go = workbench.builder.get_object("button_go")
+
+
+def go_to_location():
+    latitude = float(entry_latitude.get_text() or 0)
+    longitude = float(entry_longitude.get_text() or 0)
+    if math.isnan(latitude) or math.isnan(longitude):
+        print("Please enter valid coordinates")
+        return
+
+    if latitude > Shumate.MAX_LATITUDE or latitude < Shumate.MIN_LATITUDE:
+        print(
+            f"Latitudes must be between {Shumate.MIN_LATITUDE} and {Shumate.MAX_LATITUDE}",
+        )
+        return
+
+    if longitude > Shumate.MAX_LONGITUDE or longitude < Shumate.MIN_LONGITUDE:
+        print(
+            f"Longitudes must be between {Shumate.MIN_LONGITUDE} and {Shumate.MAX_LONGITUDE}",
+        )
+        return
+
+    viewport.set_zoom_level(5)
+    map_widget.get_map().go_to(latitude, longitude)
+
+
+button_go.connect("clicked", lambda _: go_to_location())
+
+entry_latitude.connect("activate", lambda _: go_to_location())
+
+entry_longitude.connect("activate", lambda _: go_to_location())