globalforest/forestmapview.py

from kivy.garden.mapview import MapView
from kivy.clock import Clock
from kivy.app import App

class ForestMapView(MapView):
    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