use example sqlite database

databases/populatedb.py

@@ -0,0 +1,35 @@
+from xml.etree import ElementTree as ET
+import sys
+import sqlite_utils
+
+KML = "{http://www.opengis.net/kml/2.2}"
+
+
+def iterate_kml(filepath):
+    fp = open(filepath)
+    parser = ET.XMLPullParser(["end"])
+    while True:
+        chunk = fp.read(1024 * 8)
+        parser.feed(chunk)
+        for event, element in parser.read_events():
+            assert event == "end"
+            if element.tag == f"{KML}Placemark":
+                name = element.find(f".//{KML}name").text
+                description = 'soon'
+                #description = element.find(f".//{KML}description").text
+                longitude, latitude, unknown = map(
+                    float, element.find(f".//{KML}coordinates").text.split(",")
+                )
+                yield {
+                    "name": name,
+                    "x": latitude,
+                    "y": longitude,
+                    "description": description,
+                }
+        if not chunk:
+            break
+
+
+if __name__ == "__main__":
+    db = sqlite_utils.Database("trees.db")
+    db["locations"].insert_all(iterate_kml(sys.argv[-1]))

forestmapview.kv

@@ -9,9 +9,9 @@
     on_zoom:
         self.zoom = 15 if self.zoom < 15 else self.zoom
     on_lat:
-        pass
+        self.start_get_fov_trees()
     on_lon:
-        pass
+        self.start_get_fov_trees()
     GpsBlinker:
         lat: root.lat
         lon: root.lon

forestmapview.py

@@ -1,4 +1,31 @@
 from kivy.garden.mapview import MapView
+from kivy.clock import Clock
+from kivy.app import App
 
 class ForestMapView(MapView):
-    pass
+    get_trees_timer = None
+    
+    def start_get_fov_trees(self):
+        # After one second get the trees in field of view
+        try:
+            self.get_trees_timer.cancel()
+        except:
+            pass
+        
+        self.get_trees_timer = Clock.schedule_once(self.get_fov_trees, 1)
+        
+    def get_fov_trees(self, *args):
+        # Get reference to main app and the db cursor
+        app = App.get_running_app()
+        print(self.get_bbox()) # debug gps position
+        min_lat, min_lon, max_lat, max_lon = self.get_bbox()
+        sql_statement = "SELECT * FROM trees WHERE x > %s AND x < %s and y> %s AND Y < %s" % (min_lon, max_lon, min_lat, max_lat)
+        app.cursor.execute(sql_statement)
+        trees = app.cursor.fetchall()
+        print(trees)
+        for tree in trees:
+            self.add_tree(tree)
+    
+    def add_tree(self, tree):
+        pass
+        

main.py

@@ -1,10 +1,10 @@
 # Import system modules
 from random import randrange
+import sqlite3
 
 # Import Kivy modules
 #from kivy.app import App
 from kivy.app import App
-from kivy.clock import Clock
 from kivy.lang import Builder
 
 from kivy.uix.screenmanager import Screen, ScreenManager
@@ -59,8 +59,17 @@ class MainApp(App):
         #return SampleBoxLayout()
     
     def on_start(self):
-        #Initialize GPS
+        connection = None
+        cursor = None
+        
+        # Initialize GPS
         GpsHelper().run()
+        
+        # Connect to database
+        self.connection = sqlite3.connect("forest.db")
+        self.cursor = self.connection.cursor()
+        
+        # Instantiate SearchPopupMenu
 
 if __name__ == '__main__':
     #screen_manager = ScreenManager()

requierments.txt

@@ -1,4 +1,5 @@
 ffpyplayer
+sqlite_utils
 Kivy
 Kivy-examples
 kivymd

setup_packages.sh

@@ -12,6 +12,7 @@ sudo apt-get install -y \
     python3-pip \
     python3-dev \
     ffmpeg \
+    sqlite3 \
     libtinfo5 \
     libffi-dev \
     libssl-dev \