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