[gnome-contacts/wip/map-widget: 5/7] Add map widget

[Jonas Danielsson <jonasdn src gnome org>]

commit 67c38f90fcfba6bd7a44bd08dc86ea8ab43b8419
Author: Jonas Danielsson <jonas threetimestwo org>
Date:   Tue Dec 16 07:43:42 2014 -0500

    Add map widget

 configure.ac                    |    3 +-
 data/Makefile.am                |    1 +
 data/contacts.gresource.xml     |    1 +
 data/ui/contacts-address-map.ui |   37 +++++++
 data/ui/style.css               |    5 +
 src/Makefile.am                 |    1 +
 src/contacts-address-map.vala   |  206 +++++++++++++++++++++++++++++++++++++++
 7 files changed, 253 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7ad72f6..72c4f3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,11 +50,12 @@ pkg_modules="gtk+-3.0 >= 3.12.0
             libedataserver-1.2 >= 3.5.3
             goa-1.0
             gee-0.8
+            champlain-gtk-0.12
             geocode-glib-1.0
             "
 PKG_CHECK_MODULES(CONTACTS, [$pkg_modules])
 
-CONTACTS_PACKAGES="--pkg gtk+-3.0 --pkg gio-2.0 --pkg gio-unix-2.0 --pkg folks --pkg folks-telepathy --pkg 
folks-eds --pkg libnotify --pkg geocode-glib-1.0"
+CONTACTS_PACKAGES="--pkg gtk+-3.0 --pkg gio-2.0 --pkg gio-unix-2.0 --pkg folks --pkg folks-telepathy --pkg 
folks-eds --pkg libnotify --pkg clutter-1.0 --pkg champlain-0.12 --pkg champlain-gtk-0.12 --pkg 
geocode-glib-1.0"
 AC_SUBST(CONTACTS_PACKAGES)
 
 # Optional dependency for the user accounts panel
diff --git a/data/Makefile.am b/data/Makefile.am
index 821828c..89fda4d 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -37,6 +37,7 @@ EXTRA_DIST = \
        org.gnome.Contacts.search-provider.ini.in.in \
        contacts.gresource.xml \
        ui/app-menu.ui \
+       ui/contacts-address-map.ui \
        ui/contacts-window.ui \
        ui/contacts-list-pane.ui \
        ui/style.css \
diff --git a/data/contacts.gresource.xml b/data/contacts.gresource.xml
index 2b1ba03..98bfee4 100644
--- a/data/contacts.gresource.xml
+++ b/data/contacts.gresource.xml
@@ -3,6 +3,7 @@
   <gresource prefix="/org/gnome/contacts">
     <file compressed="true">ui/style.css</file>
     <file compressed="true" preprocess="xml-stripblanks">ui/app-menu.ui</file>
+    <file compressed="true" preprocess="xml-stripblanks">ui/contacts-address-map.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">ui/contacts-window.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">ui/contacts-list-pane.ui</file>
   </gresource>
diff --git a/data/ui/contacts-address-map.ui b/data/ui/contacts-address-map.ui
new file mode 100644
index 0000000..60069cc
--- /dev/null
+++ b/data/ui/contacts-address-map.ui
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.10 -->
+  <template class="ContactsAddressMap" parent="GtkFrame">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="hexpand">False</property>
+    <property name="hexpand_set">True</property>
+    <property name="shadow_type">in</property>
+    <property name="width_request">300</property>
+    <property name="height_request">300</property>
+    <style>
+      <class name="contacts-map"/>
+    </style>
+    <child>
+      <object class="GtkStack" id="map_stack">
+        <property name="visible">True</property>
+        <child>
+          <object class="GtkImage" id="map_icon">
+            <property name="name">mark-location-image</property>
+            <property name="visible">True</property>
+            <property name="halign">center</property>
+            <property name="valign">center</property>
+            <property name="icon-name">mark-location-symbolic</property>
+            <property name="pixel-size">48</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkGrid" id="map_grid">
+            <property name="orientation">vertical</property>
+            <property name="visible">True</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>
diff --git a/data/ui/style.css b/data/ui/style.css
index 92647a7..8432977 100644
--- a/data/ui/style.css
+++ b/data/ui/style.css
@@ -10,6 +10,11 @@ ContactsListPane.frame:dir(rtl) {
   border-width: 0 0 0 1px;
 }
 
+.contacts-map {
+    background-color: @theme_bg_color;
+    color: gray;
+}
+
 /* contatcs view new color */
 .contacts-view {
   background-color: transparent;
diff --git a/src/Makefile.am b/src/Makefile.am
index a175980..87a4431 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -25,6 +25,7 @@ bin_PROGRAMS = gnome-contacts
 
 vala_sources = \
        contacts-app.vala \
+       contacts-address-map.vala \
        contacts-contact.vala \
        contacts-contact-sheet.vala \
        contacts-contact-editor.vala \
diff --git a/src/contacts-address-map.vala b/src/contacts-address-map.vala
new file mode 100644
index 0000000..7c97ff9
--- /dev/null
+++ b/src/contacts-address-map.vala
@@ -0,0 +1,206 @@
+/* -*- Mode: vala; indent-tabs-mode: t; c-basic-offset: 2; tab-width: 8 -*- */
+/*
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+using Champlain;
+using Folks;
+using Geocode;
+using Gee;
+using Gtk;
+using GtkChamplain;
+
+[GtkTemplate (ui = "/org/gnome/contacts/ui/contacts-address-map.ui")]
+public class Contacts.AddressMap : Frame {
+
+  [GtkChild]
+  private Stack map_stack;
+
+  [GtkChild]
+  private Grid map_grid;
+
+  [GtkChild]
+  private Gtk.Image map_icon;
+
+  private Set<PostalAddressFieldDetails> addresses;
+  private GLib.List<Place> found_places;
+  private Champlain.View map_view;
+  private MarkerLayer marker_layer;
+  private Mutex mutex;
+  private ulong alloc_id = 0;
+
+  public AddressMap (Contact c, Set<PostalAddressFieldDetails> postal_addresses) {
+    var map = new Embed ();
+    var map_factory = MapSourceFactory.dup_default ();
+    map_grid.add (map);
+
+    map_view = map.get_view ();
+    map_view.set_map_source (map_factory.create (MAP_SOURCE_OSM_MAPQUEST));
+    map_view.zoom_level = map_view.max_zoom_level - 2;
+
+    marker_layer = new MarkerLayer ();
+    map_view.add_layer (marker_layer);
+
+    /* This is a hack to make sure we do not get the FLEUR
+     * drag cursor on click. Ideally champlain would let us
+     * turn this of with a property. */
+    map.get_child ().button_press_event.connect (() => {
+       map.get_child ().get_window ().set_cursor (null);
+       return false;
+      });
+
+    /* Do not propagate event to the Champlain clutter stage */
+    map_view.get_stage ().captured_event.connect (() => { return true; });
+
+    map.button_press_event.connect(() => {
+       activate_action ("org.gnome.Maps",
+                        "show-contact",
+                        new Variant ("s", c.individual.id),
+                        Gtk.get_current_event_time ());
+       return true;
+      });
+
+    addresses = postal_addresses;
+    found_places = new GLib.List<Place>();
+    mutex = Mutex ();
+  }
+
+  public void load () {
+    map_stack.visible_child = map_icon;
+    var geocodes = 0;
+
+    foreach (var addr in addresses) {
+      Contact.geocode_address.begin (addr.value, (object, res) => {
+         mutex.lock ();
+
+         var place = Contact.geocode_address.end (res);
+         geocodes++;
+
+         if (place != null)
+           found_places.prepend (place);
+
+         if (geocodes == addresses.size && found_places.length () > 0)
+           show_map ();
+
+         mutex.unlock ();
+       });
+    }
+  }
+
+  private void show_pin () {
+    var theme = IconTheme.get_default ();
+    var actor = new Clutter.Actor ();
+
+    try {
+      var pixbuf = theme.load_icon ("maps-pin", 0, 0);
+      var image = new Clutter.Image ();
+
+      image.set_data (pixbuf.get_pixels (),
+                     Cogl.PixelFormat.RGBA_8888,
+                     pixbuf.get_width (),
+                     pixbuf.get_height (),
+                     pixbuf.get_rowstride ());
+
+
+      actor.set_content (image);
+      actor.set_size (pixbuf.get_width (),
+                     pixbuf.get_height ());
+    } catch (GLib.Error e) {
+      /* No good things to do here */
+    }
+
+    var marker = new Marker ();
+    var place = found_places.nth_data (0);
+
+    marker.latitude = place.location.latitude;
+    marker.longitude = place.location.longitude;
+
+    marker.add_child (actor);
+    marker_layer.add_marker (marker);
+  }
+
+  private void show_labels () {
+    foreach (var place in found_places) {
+      var label = new Champlain.Label ();
+
+      /* Getting street address resolution (house number)
+       * from OpenStreetMap is quite rare unfortunately */
+      if (place.street_address != null)
+       label.text = place.street_address;
+      else
+       label.text = place.street;
+
+      label.latitude = place.location.latitude;
+      label.longitude = place.location.longitude;
+      marker_layer.add_marker(label);
+    }
+  }
+
+  void on_allocation_changed () {
+    if (alloc_id == 0)
+      return;
+
+    var markers = (marker_layer as Clutter.Actor).get_children ();
+    if ((markers.nth_data (0) as Marker).height == 0)
+      return;
+
+    marker_layer.disconnect (alloc_id);
+    alloc_id = 0;
+
+    if (found_places.length () == 1) {
+      var place = found_places.nth_data (0);
+
+      map_view.center_on (place.location.latitude,
+                         place.location.longitude);
+    } else {
+      var bbox = new Champlain.BoundingBox ();
+
+      /* Make sure that the markers are visible */
+      foreach (var marker in markers) {
+       var x = map_view.longitude_to_x ((marker as Marker).longitude);
+       var y = map_view.latitude_to_y ((marker as Marker).latitude);
+
+       /* 256 is the only supported tile size in Champlain */
+       var lat = map_view.y_to_latitude (y - marker.height * 256);
+       var lon = map_view.x_to_longitude (x + marker.width * 256);
+
+       bbox.extend (lat, lon);
+       bbox.extend ((marker as Marker).latitude,
+                    (marker as Marker).longitude);
+      }
+      map_view.ensure_visible (bbox, false);
+    }
+  }
+
+  private void show_map () {
+    if (found_places.length () == 0) {
+      map_stack.visible_child = map_icon;
+      return;
+    }
+
+    if (found_places.length () == 1) {
+      show_pin ();
+    } else {
+      show_labels ();
+    }
+
+    map_stack.visible_child = map_grid;
+
+    /* We need to make sure that the markers knows about their width
+     * before we calculate the visible bounding box and show
+     * the markers.*/
+    alloc_id = marker_layer.allocation_changed.connect (on_allocation_changed);
+  }
+}