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"""
Part of the tagit module.
A copy of the license is provided with the project.
Author: Matthias Baumgartner, 2022
"""
# standard imports
import os
# kivy ipmorts
from kivy.lang import Builder
from kivy.uix.label import Label
import kivy.properties as kp
# tagit imports
# NOTE: the following line segfaults:
# mapview.source.py:128:self.dp_tile_size = min(dp(self.tile_size), self.tile_size * 2)
# setting it to a static value (e.g. 256) works.
from tagit.external.kivy_garden.mapview import MapView, MapMarkerPopup
from tagit.utils import ns
from tagit.widgets.browser import BrowserAwareMixin
# inner-module imports
from .tile import Tile
# exports
__all__ = ('Map', )
## code ##
Builder.load_string('''
<Map>:
# meta
title: "Map"
tooltip: 'Location of an item'
# content
map_: map_
MapView:
id: map_
zoom: 9
<MapLabel>:
size: self.texture_size
size_hint: None, None
padding: 5, 5
font_size: '15sp'
canvas.before:
# background
Color:
rgba: 0,0,0,0.6
RoundedRectangle:
size: self.size
pos: self.pos
radius: [10] # keep in sync with the line's radius
# border
Color:
rgba: 0,0,0,1
Line:
rounded_rectangle: self.x, self.y, self.width, self.height, 10
''')
class MapLabel(Label):
pass
class Map(Tile, BrowserAwareMixin):
"""Draw a map which indicates visible items' locations."""
# list of map markers
markers = kp.ListProperty()
def on_browser(self, sender, browser):
"""Bind to browser properties."""
# remove old binding
if self.browser is not None:
self.browser.unbind(cursor=self.update)
self.browser.unbind(items=self.update_markers)
# add new binding
self.browser = browser
if self.browser is not None:
self.browser.bind(cursor=self.update)
self.browser.bind(items=self.update_markers)
# initial calls
self.update_markers()
self.update()
def __del__(self):
if self.browser is not None:
self.browser.unbind(cursor=self.update)
self.browser.unbind(items=self.update_markers)
self.browser = None
def update_markers(self, *args):
"""Draw markers for all browser items."""
# remove old markers
for mark in self.markers:
self.map_.remove_marker(mark)
self.markers.clear()
# get view data
data = self.root.browser.unfold(self.root.browser.items).get(
ns.bse.filename,
ns.bse.latitude,
ns.bse.longitude,
node=True,
)
# draw new markers
for ent, vdict in data.items():
if ns.bse.latitude not in vdict:
continue
if ns.bse.longitude not in vdict:
continue
# TODO: cluster points, one marker for multiple items
lat = vdict[ns.bse.latitude]
lon = vdict[ns.bse.longitude]
# create popup marker
mark = MapMarkerPopup(lat=lat, lon=lon)
text = vdict.get(ns.bse.filename,
', '.join(os.path.basename(guid) for guid in ent.guids))
mark.add_widget(MapLabel(text=text))
# add marker
self.markers.append(mark)
self.map_.add_marker(mark)
def update(self, *args):
"""Focus the map on the cursor."""
if not self.visible:
return
cursor = self.root.browser.cursor
if cursor is not None:
coords = cursor.get(ns.bse.latitude, ns.bse.longitude)
if set(coords.keys()) == {ns.bse.latitude, ns.bse.longitude}:
lat = coords[ns.bse.latitude]
lon = coords[ns.bse.longitude]
self.map_.center_on(lat, lon)
## EOF ##
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