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Viewing changes to src/userLocation.js

  • Committer: Package Import Robot
  • Author(s): Andreas Henriksson
  • Date: 2014-09-22 23:04:28 UTC
  • mfrom: (1.1.3) (2.1.3 experimental)
  • Revision ID: package-import@ubuntu.com-20140922230428-zvgvmk5pea6eavcz
Tags: 3.14.0-1
* New upstream release.
* Drop debian/patches/gjs-readwrite-flags.patch, fixed upstream.

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src/userLocation.js
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/* -*- Mode: JS2; indent-tabs-mode: nil; js2-basic-offset: 4 -*- */
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/* vim: set et ts=4 sw=4: */
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/*
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 * Copyright (c) 2011, 2012, 2013 Red Hat, Inc.
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 *
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 * GNOME Maps 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 the
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 * Free Software Foundation; either version 2 of the License, or (at your
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 * option) any later version.
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 *
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 * GNOME Maps is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
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 * with GNOME Maps; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 * Author: Zeeshan Ali (Khattak) <zeeshanak@gnome.org>
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 */
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const Clutter = imports.gi.Clutter;
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const Champlain = imports.gi.Champlain;
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const GObject = imports.gi.GObject;
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const Lang = imports.lang;
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const Mainloop = imports.mainloop;
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const MapLocation = imports.mapLocation;
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const Utils = imports.utils;
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const Path = imports.path;
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const _ = imports.gettext.gettext;
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const UserLocation = new Lang.Class({
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    Name: 'UserLocation',
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    Extends: MapLocation.MapLocation,
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    show: function(layer) {
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        layer.remove_all();
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        this._locationMarker = new Champlain.CustomMarker();
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        this._locationMarker.set_location(this.latitude, this.longitude);
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        this._locationMarker.connect('notify::size', (function() {
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            let translate_x = -Math.floor(this._locationMarker.get_width() / 2);
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            this._locationMarker.set_translation(translate_x,
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                                                 -this._locationMarker.get_height(),
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                                                 0);
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        }).bind(this));
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        let pin_actor = Utils.CreateActorFromImageFile(Path.ICONS_DIR + "/pin.svg");
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        if (!pin_actor)
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            return;
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        let bubbleActor = Utils.CreateActorFromImageFile(Path.ICONS_DIR + "/bubble.svg");
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        if (!bubbleActor)
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            return;
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        bubbleActor.set_x_expand(true);
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        bubbleActor.set_y_expand(true);
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        /* Translators: Showing name of place where user currently is and
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                        accuracy of this information (which is translated
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                        separately)
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        */
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        let text = _("%s\nPosition Accuracy: %s")
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                .format (this.description, this.getAccuracyDescription());
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        let textActor = new Clutter.Text({ text: text });
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        textActor.set_use_markup(true);
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        textActor.set_margin_left(6);
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        textActor.set_margin_right(6);
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        textActor.set_color(new Clutter.Color({ red: 255,
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                                                blue: 255,
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                                                green: 255,
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                                                alpha: 255 }));
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        let layout = new Clutter.BinLayout();
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        let descriptionActor = new Clutter.Actor({ layout_manager: layout });
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        descriptionActor.add_child(bubbleActor);
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        descriptionActor.add_child(textActor);
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        layout = new Clutter.BoxLayout({ vertical: true });
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        let locationActor = new Clutter.Actor({ layout_manager: layout });
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        locationActor.add_child(descriptionActor);
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        locationActor.add_child(pin_actor);
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        this._locationMarker.add_actor(locationActor);
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        this._locationMarker.bind_property("selected",
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                                           descriptionActor, "visible",
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                                           GObject.BindingFlags.SYNC_CREATE);
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        if (this.accuracy === 0) {
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            layer.add_marker(this._locationMarker);
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            return;
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        }
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        // FIXME: Perhaps this is a misuse of Champlain.Point class and we
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        // should draw the cirlce ourselves using Champlain.CustomMarker?
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        // Although for doing so we'll need to add a C lib as cairo isn't
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        // exactly introspectable.
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        this._accuracyMarker = new Champlain.Point();
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        this._accuracyMarker.set_color(new Clutter.Color({ red: 0,
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                                                           blue: 255,
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                                                           green: 0,
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                                                           alpha: 50 }));
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        this._accuracyMarker.set_location(this.latitude, this.longitude);
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        this._accuracyMarker.set_reactive(false);
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        this._updateAccuracyMarker();
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        if (this._selectedId > 0)
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            this._locationMarker.disconnect(this._selectedId);
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        this._selectedId = this._locationMarker.connect("notify::selected",
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                                                        this._updateAccuracyMarker.bind(this));
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        layer.add_marker(this._accuracyMarker);
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        layer.add_marker(this._locationMarker);
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        if (this._zoomLevelId > 0)
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            this._view.disconnect(this._zoomLevelId);
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        this._zoomLevelId = this._view.connect("notify::zoom-level", this._updateAccuracyMarker.bind(this));
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    },
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    _updateAccuracyMarker: function() {
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        if (!this._locationMarker.get_selected()) {
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            this._accuracyMarker.hide();
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            return;
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        }
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        let zoom = this._view.get_zoom_level();
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        let source = this._view.get_map_source();
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        let metersPerPixel = source.get_meters_per_pixel(zoom, this.latitude, this.longitude);
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        let size = this.accuracy * 2 / metersPerPixel;
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        let viewWidth = this._view.get_width();
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        let viewHeight = this._view.get_height();
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        if ((viewWidth > 0 && viewHeight > 0) &&
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            (size > viewWidth && size > viewHeight))
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            this._accuracyMarker.hide();
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        else {
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            this._accuracyMarker.set_size(size);
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            this._accuracyMarker.show();
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        }
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    }
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});