Files
gramps/src/plugins/lib/maps/markerlayer.py
Serge Noiraud 7c1e29aa60 Geography : Some cleaning, ImageSurface needs an utf-8 path
messagelayer : get the real window size.
            osmgpsmap must be >= 0.8


svn: r20389
2012-09-14 20:29:48 +00:00

185 lines
6.0 KiB
Python

# -*- python -*-
# -*- coding: utf-8 -*-
#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2011-2012 Serge Noiraud
#
# This program 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# $Id$
#-------------------------------------------------------------------------
#
# Python modules
#
#-------------------------------------------------------------------------
import os
from gi.repository import GObject
from math import *
#------------------------------------------------------------------------
#
# Set up logging
#
#------------------------------------------------------------------------
import logging
_LOG = logging.getLogger("maps.marker")
#-------------------------------------------------------------------------
#
# GTK/Gnome modules
#
#-------------------------------------------------------------------------
from gi.repository import Gtk
import cairo
#-------------------------------------------------------------------------
#
# Gramps Modules
#
#-------------------------------------------------------------------------
#-------------------------------------------------------------------------
#
# set up logging
#
#-------------------------------------------------------------------------
import time
import logging
_LOG = logging.getLogger("GeoGraphy.markerlayer")
#-------------------------------------------------------------------------
#
# osmGpsMap
#
#-------------------------------------------------------------------------
try:
from gi.repository import OsmGpsMap as osmgpsmap
except:
raise
class MarkerLayer(GObject.GObject, osmgpsmap.MapLayer):
"""
This is the layer used to display the markers.
"""
def __init__(self):
"""
Initialize the layer
"""
GObject.GObject.__init__(self)
self.markers = []
self.max_references = 0
self.max_places = 0
self.nb_ref_by_places = 0
self.max_value = 0
self.min_value = 9999
def clear_markers(self):
"""
reset the layer attributes.
"""
self.markers = []
self.max_references = 0
self.max_places = 0
self.nb_ref_by_places = 0
self.max_value = 0
self.min_value = 9999
def add_marker(self, points, image, count):
"""
Add a marker.
Set minimum value, maximum value for the markers
Set the average value too.
We calculate that here, to minimize the overhead at markers drawing
"""
self.markers.append((points, image, count))
self.max_references += count
self.max_places += 1
if count > self.max_value:
self.max_value = count
if count < self.min_value:
self.min_value = count
self.nb_ref_by_places = self.max_references / self.max_places
def do_draw(self, gpsmap, ctx):
"""
Draw all markers here. Calculate where to draw the marker.
Depending of the average, minimum and maximum value, resize the marker.
We use cairo to resize the marker.
"""
max_interval = self.max_value - self.nb_ref_by_places
min_interval = self.nb_ref_by_places - self.min_value
if max_interval == 0: # This to avoid divide by zero
max_interval = 0.01
if min_interval == 0: # This to avoid divide by zero
min_interval = 0.01
_LOG.debug("%s" % time.strftime("start drawing : "
"%a %d %b %Y %H:%M:%S", time.gmtime()))
for marker in self.markers:
ctx.save()
# the icon size in 48, so the standard icon size is 0.6 * 48 = 28.8
size = 0.6
mark = float(marker[2])
if mark > self.nb_ref_by_places:
# at maximum, we'll have an icon size = (0.6 + 0.3) * 48 = 43.2
size += (0.3 * ((mark - self.nb_ref_by_places)
/ max_interval) )
else:
# at minimum, we'll have an icon size = (0.6 - 0.3) * 48 = 14.4
size -= (0.3 * ((self.nb_ref_by_places - mark)
/ min_interval) )
conv_pt = osmgpsmap.MapPoint.new_degrees(float(marker[0][0]),
float(marker[0][1]))
coord_x, coord_y = gpsmap.convert_geographic_to_screen(conv_pt)
ctx.translate(coord_x, coord_y)
ctx.scale( size, size)
# below, we try to place exactly the marker depending on its size.
# Normaly, the left top corner of the image is set to the coordinates.
# The tip of the pin which should be at the marker position is at
# 3/18 of the width and to the height of the image.
# So we shift the image position.
posY = - int( 48 * size + 0.5 ) - 10
posX = - int(( 48 * size ) / 6 + 0.5 ) - 10
ctx.set_source_surface(marker[1], posX, posY)
ctx.paint()
ctx.restore()
_LOG.debug("%s" % time.strftime("end drawing : "
"%a %d %b %Y %H:%M:%S", time.gmtime()))
def do_render(self, gpsmap):
"""
render the layer
"""
pass
def do_busy(self):
"""
set the layer busy
"""
return False
def do_button_press(self, gpsmap, gdkeventbutton):
"""
When we press a button.
"""
return False
GObject.type_register(MarkerLayer)