iPDC-suite/test-examples/examples/mapviewer.py

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2022-09-24 14:25:37 +05:30
#!/usr/bin/env python3
"""
Copyright (C) Hadley Rich 2008 <hads@nice.net.nz>
based on main.c - with thanks to John Stowers
This is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
"""
import random
import gi
gi.require_version("Gdk", "3.0")
gi.require_version("Gtk", "3.0")
gi.require_version("OsmGpsMap", "1.0")
from gi.repository import (
Gdk,
GdkPixbuf,
GLib,
GObject,
Gtk,
OsmGpsMap as osmgpsmap,
) # noqa
print(f"using library: {osmgpsmap.__file__} (version {osmgpsmap._version})")
assert osmgpsmap._version == "1.0"
class DummyMapNoGpsPoint(osmgpsmap.Map):
def do_draw_gps_point(self, drawable):
pass
GObject.type_register(DummyMapNoGpsPoint)
class DummyLayer(GObject.GObject, osmgpsmap.MapLayer):
def __init__(self):
GObject.GObject.__init__(self)
def do_draw(self, gpsmap, gdkdrawable):
pass
def do_render(self, gpsmap):
pass
def do_busy(self):
return False
def do_button_press(self, gpsmap, gdkeventbutton):
return False
GObject.type_register(DummyLayer)
class UI(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, type=Gtk.WindowType.TOPLEVEL)
self.set_default_size(500, 500)
self.connect("destroy", lambda x: Gtk.main_quit())
self.set_title("OpenStreetMap GPS Mapper")
self.vbox = Gtk.VBox(homogeneous=False, spacing=0)
self.add(self.vbox)
if 0:
self.osm = DummyMapNoGpsPoint()
else:
self.osm = osmgpsmap.Map()
self.osm.layer_add(
osmgpsmap.MapOsd(show_dpad=True,
show_zoom=True,
show_crosshair=True)
)
self.osm.set_property("map-source", osmgpsmap.MapSource_t.OPENSTREETMAP)
self.osm.layer_add(DummyLayer())
self.last_image = None
self.osm.connect("button_press_event", self.on_button_press)
self.osm.connect("changed", self.on_map_change)
# connect keyboard shortcuts
self.osm.set_keyboard_shortcut(
osmgpsmap.MapKey_t.FULLSCREEN, Gdk.keyval_from_name("F11")
)
self.osm.set_keyboard_shortcut(
osmgpsmap.MapKey_t.UP, Gdk.keyval_from_name("Up")
)
self.osm.set_keyboard_shortcut(
osmgpsmap.MapKey_t.DOWN, Gdk.keyval_from_name("Down")
)
self.osm.set_keyboard_shortcut(
osmgpsmap.MapKey_t.LEFT, Gdk.keyval_from_name("Left")
)
self.osm.set_keyboard_shortcut(
osmgpsmap.MapKey_t.RIGHT, Gdk.keyval_from_name("Right")
)
# connect to tooltip
self.osm.props.has_tooltip = True
self.osm.connect("query-tooltip", self.on_query_tooltip)
self.latlon_entry = Gtk.Entry()
zoom_in_button = Gtk.Button.new_from_icon_name("zoom-in",
Gtk.IconSize.BUTTON)
zoom_in_button.connect("clicked", self.zoom_in_clicked)
zoom_out_button = Gtk.Button.new_from_icon_name("zoom-out",
Gtk.IconSize.BUTTON)
zoom_out_button.connect("clicked", self.zoom_out_clicked)
home_button = Gtk.Button.new_from_icon_name("go-home",
Gtk.IconSize.BUTTON)
home_button.connect("clicked", self.home_clicked)
cache_button = Gtk.Button(label="Cache")
cache_button.connect("clicked", self.cache_clicked)
self.vbox.pack_start(self.osm, True, True, 0)
hbox = Gtk.HBox(homogeneous=False, spacing=0)
hbox.pack_start(zoom_in_button, False, True, 0)
hbox.pack_start(zoom_out_button, False, True, 0)
hbox.pack_start(home_button, False, True, 0)
hbox.pack_start(cache_button, False, True, 0)
# add ability to test custom map URIs
ex = Gtk.Expander(label="<b>Map Repository URI</b>")
ex.props.use_markup = True
vb = Gtk.VBox()
self.repouri_entry = Gtk.Entry()
self.repouri_entry.set_text(self.osm.props.repo_uri)
self.image_format_entry = Gtk.Entry()
self.image_format_entry.set_text(self.osm.props.image_format)
lbl = Gtk.Label(
label="""Enter an repository URL to fetch map tiles \
from in the box below. Special metacharacters may be included in this url
<i>Metacharacters:</i>
\t#X\tMax X location
\t#Y\tMax Y location
\t#Z\tMap zoom (0 = min zoom, fully zoomed out)
\t#S\tInverse zoom (max-zoom - #Z)
\t#Q\tQuadtree encoded tile (qrts)
\t#W\tQuadtree encoded tile (1234)
\t#U\tEncoding not implemeted
\t#R\tRandom integer, 0-4"""
)
lbl.props.xalign = 0
lbl.props.use_markup = True
lbl.props.wrap = True
ex.add(vb)
vb.pack_start(lbl, False, True, 0)
hb = Gtk.HBox()
hb.pack_start(Gtk.Label(label="URI: "), False, True, 0)
hb.pack_start(self.repouri_entry, True, True, 0)
vb.pack_start(hb, False, True, 0)
hb = Gtk.HBox()
hb.pack_start(Gtk.Label(label="Image Format: "), False, True, 0)
hb.pack_start(self.image_format_entry, True, True, 0)
vb.pack_start(hb, False, True, 0)
gobtn = Gtk.Button(label="Load Map URI")
gobtn.connect("clicked", self.load_map_clicked)
vb.pack_start(gobtn, False, True, 0)
self.show_tooltips = False
cb = Gtk.CheckButton(label="Show Location in Tooltips")
cb.props.active = self.show_tooltips
cb.connect("toggled", self.on_show_tooltips_toggled)
self.vbox.pack_end(cb, False, True, 0)
cb = Gtk.CheckButton(label="Disable Cache")
cb.props.active = False
cb.connect("toggled", self.disable_cache_toggled)
self.vbox.pack_end(cb, False, True, 0)
self.vbox.pack_end(ex, False, True, 0)
self.vbox.pack_end(self.latlon_entry, False, True, 0)
self.vbox.pack_end(hbox, False, True, 0)
GLib.timeout_add(500, self.print_tiles)
def disable_cache_toggled(self, btn):
if btn.props.active:
self.osm.props.tile_cache = osmgpsmap.MAP_CACHE_DISABLED
else:
self.osm.props.tile_cache = osmgpsmap.MAP_CACHE_AUTO
def on_show_tooltips_toggled(self, btn):
self.show_tooltips = btn.props.active
def load_map_clicked(self, button):
uri = self.repouri_entry.get_text()
format = self.image_format_entry.get_text()
if uri and format:
if self.osm:
# remove old map
self.vbox.remove(self.osm)
try:
self.osm = osmgpsmap.Map(repo_uri=uri, image_format=format)
except Exception as e:
print("ERROR:", e)
self.osm = osmgpsmap.Map()
self.vbox.pack_start(self.osm, True, True, 0)
self.osm.show()
def print_tiles(self):
if self.osm.props.tiles_queued != 0:
print(self.osm.props.tiles_queued, "tiles queued")
return True
def zoom_in_clicked(self, button):
self.osm.set_zoom(self.osm.props.zoom + 1)
def zoom_out_clicked(self, button):
self.osm.set_zoom(self.osm.props.zoom - 1)
def home_clicked(self, button):
self.osm.set_center_and_zoom(-44.39, 171.25, 12)
def on_query_tooltip(self, widget, x, y, keyboard_tip, tooltip, data=None):
if keyboard_tip:
return False
if self.show_tooltips:
p = osmgpsmap.point_new_degrees(0.0, 0.0)
self.osm.convert_screen_to_geographic(x, y, p)
lat, lon = p.get_degrees()
tooltip.set_markup(f"{lat:+.4f}, {lon:+.4f}")
return True
return False
def cache_clicked(self, button):
bbox = self.osm.get_bbox()
self.osm.download_maps(
*bbox,
zoom_start=self.osm.props.zoom,
zoom_end=self.osm.props.max_zoom
)
def on_map_change(self, osm):
self.latlon_entry.set_text(
f"Map Centre: latitude {self.osm.props.latitude} "
f"longitude {self.osm.props.longitude}"
)
def on_button_press(self, osm, event):
state = event.get_state()
lat, lon = self.osm.get_event_location(event).get_degrees()
left = event.button == 1 and state == 0
middle = event.button == 2 or (
event.button == 1 and state & Gdk.ModifierType.SHIFT_MASK
)
right = event.button == 3 or (
event.button == 1 and state & Gdk.ModifierType.CONTROL_MASK
)
# work around binding bug with invalid variable name
GDK_2BUTTON_PRESS = getattr(Gdk.EventType, "2BUTTON_PRESS")
GDK_3BUTTON_PRESS = getattr(Gdk.EventType, "3BUTTON_PRESS")
if event.type == GDK_3BUTTON_PRESS:
if middle:
if self.last_image is not None:
self.osm.image_remove(self.last_image)
self.last_image = None
elif event.type == GDK_2BUTTON_PRESS:
if left:
self.osm.gps_add(lat, lon, heading=random.random() * 360)
if middle:
pb = GdkPixbuf.Pixbuf.new_from_file_at_size("poi.png", 24, 24)
self.last_image = self.osm.image_add(lat, lon, pb)
if right:
pass
if __name__ == "__main__":
u = UI()
u.show_all()
Gtk.main()