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* src/DataViews/_MapView.py: First badly hacked version of online map downloading.

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svn: r6451
This commit is contained in:
Martin Hawlisch 2006-04-26 20:15:10 +00:00
parent 53c551afd5
commit f2fe4dc6f9
2 changed files with 147 additions and 47 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2006-04-26 Martin Hawlisch <Martin.Hawlisch@gmx.de>
* src/DataViews/_MapView.py: First badly hacked version of online map
downloading.
2006-04-25 Alex Roitman <shura@gramps-project.org>
* src/GrampsCfg.py (build_window_key): Remove, as there's no need
to override the base class anymore.

102
src/DataViews/_MapView.py
View File

@ -30,6 +30,12 @@ import gc
import logging
import os
import math
import urllib
import urllib2
import tempfile
from xml.dom.minidom import parseString as xmlStringParser
use_online_map = False
log = logging.getLogger(".")
@ -72,7 +78,7 @@ glob_loc_data = [ # (Name, longitude, latitude)
("Mannheim-Neckarau",8.48,49.45),
("Gorxheimertal",8.73,49.53)]
enable_debug = False
enable_debug = True
# Draws a map image and tries to allocate space in the correct aspect ratio
@ -221,6 +227,93 @@ class MapTile:
self.scale = None
self.scaled_pixbuf = None
class WMSMapTile:
def __init__(self,capabilities):
self.scaled_pixbuf = None
self.capabilities_url = capabilities
u_reader = urllib2.urlopen(self.capabilities_url)
response_body = u_reader.read()
u_reader.close()
xml_doc = xmlStringParser( response_body)
# validate name of root element
e = xml_doc.documentElement
if e.nodeName != "WMT_MS_Capabilities":
print "unsupported Document type '%s'" % e.nodeName
return None
self.map_request_params = {}
self.map_request_params["VERSION"] = e.getAttribute("version")
self.map_request_params["REQUEST"] = "GetMap"
self.map_request_params["SERVICE"] = "WMS"
self.map_request_params["REQUEST"] = "GetMap"
self.map_request_params["REQUEST"] = "GetMap"
self.map_request_params["FORMAT"] = "image/png"
self.map_request_params["SRS"] = "epsg:4326"
self.map_request_params["LAYERS"] = ""
# Child-nodes of root element
for n in e.childNodes:
if n.nodeName == "Service":
# Parse Service header
map_title = n.getElementsByTagName("Title")[0].firstChild.data
print " MAP Title: %s" % map_title
try:
map_fees = e.getElementsByTagName("Fees")[0].firstChild.data
except IndexError:
map_fees = "-"
print " MAP Fees: %s" % map_fees
try:
map_access_constraints = e.getElementsByTagName("AccessConstraints")[0].firstChild.data
except IndexError:
map_access_constraints = "-"
print " MAP AccessConstraints: %s" % map_access_constraints
elif n.nodeName == "Capability":
# Parse Capabilities
for n2 in n.childNodes:
if n2.nodeName == "Request":
t1 = n2.getElementsByTagName("GetMap")[0]
t2 = t1.getElementsByTagName("DCPType")[0]
t3 = t2.getElementsByTagName("HTTP")[0]
t4 = t3.getElementsByTagName("Get")[0]
t5 = t4.getElementsByTagName("OnlineResource")[0]
self.map_get_url = t5.getAttribute("xlink:href")
print(" Map Tile base url: %s" % self.map_get_url)
elif n2.nodeName == "Layer":
# parse Layers
if not self._srs_is_supported(n2.getElementsByTagName("SRS")[0].firstChild.data):
print "Layer coordinates not supported :-("
return None
layer_title = n2.getElementsByTagName("Title")[0].firstChild.data
print " Layer: %s" % layer_title
for n3 in n2.childNodes:
if n3.nodeName == "Layer":
# parse Layers
layer_title = n3.getElementsByTagName("Title")[0].firstChild.data
print " - Layer: %s" % layer_title
if self.map_request_params["LAYERS"]:
self.map_request_params["LAYERS"] += ","
self.map_request_params["LAYERS"] += layer_title
def _srs_is_supported( self, srs_string):
list = srs_string.lower().split()
if "epsg:4326" in list:
return True
return False
def set_viewport( self, target_scale, x_in, y_in, w_in, h_in):
self.scaled_map_x = x_in
self.scaled_map_y = y_in
self.scaled_map_pixel_w = int(w_in*target_scale)
self.scaled_map_pixel_h = int(h_in*target_scale)
self.map_request_params["BBOX"] = "%f,%f,%f,%f" % (x_in,y_in-h_in,x_in+w_in,y_in) # Neds to be set for request
self.map_request_params["WIDTH"] = int(w_in*target_scale)
self.map_request_params["HEIGHT"] = int(h_in*target_scale)
params = urllib.urlencode(self.map_request_params)
f = tempfile.NamedTemporaryFile()
f_name = f.name
urllib.urlretrieve(self.map_get_url+params,f_name)
self.scaled_pixbuf = gtk.gdk.pixbuf_new_from_file(f_name)
def free(self):
pass
# Zoomable map image
class ZoomMap( gtk.DrawingArea):
@ -241,6 +334,9 @@ class ZoomMap( gtk.DrawingArea):
self.textlayout = self.create_pango_layout("")
self.map_sources = {}
self.initial_exposed = False
if use_online_map:
self.map_sources[0.0] = []
self.map_sources[0.0].append(WMSMapTile("http://www2.demis.nl/wms/wms.asp?wms=WorldMap&VERSION=1.1.1&REQUEST=GetCapabilities"))
def add_map_source( self,filename, x, y, w, h,pw,ph):
tile = MapTile( filename, x, y, w, h, pw, ph)
@ -411,7 +507,7 @@ class ZoomMap( gtk.DrawingArea):
self.queue_draw()
def zoom_in(self):
self.magnifer = min( 500.0, self.magnifer * 1.5)
self.magnifer = min( 1000.0, self.magnifer * 1.5)
self.backbuf = None
self.queue_draw()
@ -557,6 +653,7 @@ class MapView(PageView.PageView):
self.zoom_map = ZoomMap(
gtk.gdk.pixbuf_new_from_file(os.path.join(const.image_dir,"bad.png")),
gtk.gdk.pixbuf_new_from_file(os.path.join(const.image_dir,"good.png")))
if not use_online_map:
self.zoom_map.add_map_source('world.topo.200407.3x3200x1600_tile_0_0.jpg', -180,90, 45,45, 400,400)
self.zoom_map.add_map_source('world.topo.200407.3x3200x1600_tile_0_1.jpg', -135,90, 45,45, 400,400)
self.zoom_map.add_map_source('world.topo.200407.3x3200x1600_tile_0_2.jpg', -90,90, 45,45, 400,400)
@ -601,7 +698,6 @@ class MapView(PageView.PageView):
self.zoom_map.add_map_source('world.topo.200407.3x400x200.jpg', -180,90, 360,180, 400,200)
self.zoom_map.add_map_source('world.topo.200407.3x128x60.jpg', -180,90, 360,180, 128,60)
#self.zoom_map.add_map_source("europe_2_0.jpg",0,90,90,90,1024,1024)
self.zoom_map.set_size_request(300,300)
hbox.pack_start( self.zoom_map, True, True, 0)