# -*- 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)