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[evolution/account-mgmt: 31/33] Add 'cal-config-weather' module.

commit d91f1fd660f07b84d00feb3295a5513924d9274a
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Feb 4 08:49:12 2011 -0500

    Add 'cal-config-weather' module.
    
    Registers the "Weather" backend in ECalSourceConfig widgets.
    
    Replaces the 'calendar-weather' plugin.

 configure.ac                                       |   23 +-
 modules/Makefile.am                                |    5 +
 modules/cal-config-weather/Makefile.am             |   28 ++
 modules/cal-config-weather/e-source-weather.c      |  224 +++++++++
 modules/cal-config-weather/e-source-weather.h      |   82 ++++
 .../evolution-cal-config-weather.c                 |  307 ++++++++++++
 plugins/calendar-weather/Makefile.am               |   35 --
 plugins/calendar-weather/calendar-weather.c        |  492 --------------------
 .../org-gnome-calendar-weather.eplug.xml           |   34 --
 9 files changed, 657 insertions(+), 573 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d7f6868..faf7e15 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1406,7 +1406,7 @@ dnl Add any new plugins here
 plugins_base_always="itip-formatter default-source mark-all-read groupwise-features publish-calendar caldav imap-features google-account-setup"
 
 plugins_base="$plugins_base_always $SA_JUNK_PLUGIN $BF_JUNK_PLUGIN"
-dist_plugins_base="$plugins_base_always calendar-weather sa-junk-plugin bogo-junk-plugin"
+dist_plugins_base="$plugins_base_always sa-junk-plugin bogo-junk-plugin"
 
 plugins_standard_always="bbdb save-calendar mail-to-task mailing-list-actions prefer-plain mail-notification attachment-reminder backup-restore email-custom-header face templates vcard-inline dbx-import"
 
@@ -1458,27 +1458,27 @@ if test "x$enable_audio_inline" = "xyes"; then
 	fi
 fi
 
-dnl *****************************************
-dnl calendar-weather plugin requires gweather
-dnl *****************************************
+dnl **************************************
+dnl Weather calendars require gweather-3.0
+dnl **************************************
 AC_ARG_ENABLE([weather],
 	[AS_HELP_STRING([--enable-weather],
-	[Enable calendar-weather plugin @<:@default=yes@:>@])],
+	[Enable weather calendars @<:@default=yes@:>@])],
 	[enable_weather="$enableval"],[enable_weather=yes])
 
-if test "x$enable_weather" = "xyes"; then
+if test "x$enable_weather" != "xno"; then
 	PKG_CHECK_MODULES([GWEATHER], gweather-3.0 >= gweather_minimum_version,
 	have_weather="yes", have_weather="no")
 	AC_SUBST(GWEATHER_CFLAGS)
 	AC_SUBST(GWEATHER_LIBS)
 
-	if test "x$have_weather" = "xyes"; then
-		plugins_base="$plugins_base calendar-weather"
-	else
-		AC_MSG_ERROR([gweather-3.0 >= gweather_minimum_version is required for the calendar-weather plugin.  Use --disable-weather to exclude the plugin.])
+	if test "x$have_weather" = "xno"; then
+		AC_MSG_ERROR([gweather-3.0 >= gweather_minimum_version is required for configuring weather calendars.  Use --disable-weather to disable this feature.])
 	fi
 fi
 
+AM_CONDITIONAL(ENABLE_WEATHER, [test "x$enable_weather" != "xno"])
+
 dnl ******************************************************
 dnl contacts-map plugin requires champlain-gtk and geoclue
 dnl N.B. The plugin is experimental so only require these
@@ -1746,6 +1746,7 @@ modules/book-config-local/Makefile
 modules/book-config-webdav/Makefile
 modules/cal-config-contacts/Makefile
 modules/cal-config-local/Makefile
+modules/cal-config-weather/Makefile
 modules/cal-config-webcal/Makefile
 modules/composer-autosave/Makefile
 modules/connman/Makefile
@@ -1765,8 +1766,6 @@ plugins/audio-inline/Makefile
 plugins/backup-restore/Makefile
 plugins/bbdb/Makefile
 plugins/bogo-junk-plugin/Makefile
-plugins/caldav/Makefile
-plugins/calendar-weather/Makefile
 plugins/dbx-import/Makefile
 plugins/default-source/Makefile
 plugins/email-custom-header/Makefile
diff --git a/modules/Makefile.am b/modules/Makefile.am
index b153dd8..1407e1d 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -2,6 +2,10 @@ if ENABLE_LDAP
 CONFIG_LDAP_DIR = book-config-ldap
 endif
 
+if ENABLE_WEATHER
+CONFIG_WEATHER_DIR = cal-config-weather
+endif
+
 if ENABLE_MONO
 MONO_DIR = plugin-mono
 endif
@@ -32,6 +36,7 @@ SUBDIRS = \
 	book-config-webdav \
 	cal-config-contacts \
 	cal-config-local \
+	$(CONFIG_WEATHER_DIR) \
 	cal-config-webcal \
 	composer-autosave \
 	mailto-handler \
diff --git a/modules/cal-config-weather/Makefile.am b/modules/cal-config-weather/Makefile.am
new file mode 100644
index 0000000..802f249
--- /dev/null
+++ b/modules/cal-config-weather/Makefile.am
@@ -0,0 +1,28 @@
+module_LTLIBRARIES = libevolution-module-cal-config-weather.la
+
+libevolution_module_cal_config_weather_la_CPPFLAGS =		\
+	$(AM_CPPFLAGS)						\
+	-I$(top_srcdir)						\
+	-I$(top_srcdir)/widgets					\
+	-DG_LOG_DOMAIN=\"evolution-cal-config-weather\"		\
+	$(EVOLUTION_CALENDAR_CFLAGS)				\
+	$(GNOME_PLATFORM_CFLAGS)				\
+	$(GWEATHER_CFLAGS)
+
+libevolution_module_cal_config_weather_la_SOURCES =		\
+	evolution-cal-config-weather.c				\
+	e-source-weather.c					\
+	e-source-weather.h
+
+libevolution_module_cal_config_weather_la_LIBADD =		\
+	$(top_builddir)/e-util/libeutil.la			\
+	$(top_builddir)/widgets/misc/libemiscwidgets.la		\
+	$(top_builddir)/calendar/gui/libevolution-calendar.la	\
+	$(EVOLUTION_CALENDAR_LIBS)				\
+	$(GNOME_PLATFORM_LIBS)					\
+	$(GWEATHER_LIBS)
+
+libevolution_module_cal_config_weather_la_LDFLAGS =		\
+	-module -avoid-version $(NO_UNDEFINED)
+
+-include $(top_srcdir)/git.mk
diff --git a/modules/cal-config-weather/e-source-weather.c b/modules/cal-config-weather/e-source-weather.c
new file mode 100644
index 0000000..7db5e99
--- /dev/null
+++ b/modules/cal-config-weather/e-source-weather.c
@@ -0,0 +1,224 @@
+/*
+ * e-source-weather.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <webcal://www.gnu.org/licenses/>
+ *
+ */
+
+#include "e-source-weather.h"
+
+#define E_SOURCE_WEATHER_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_SOURCE_WEATHER, ESourceWeatherPrivate))
+
+struct _ESourceWeatherPrivate {
+	ESourceWeatherUnits units;
+	gchar *location;
+};
+
+enum {
+	PROP_0,
+	PROP_LOCATION,
+	PROP_UNITS
+};
+
+static GType e_source_weather_units_type = G_TYPE_INVALID;
+
+G_DEFINE_DYNAMIC_TYPE (
+	ESourceWeather,
+	e_source_weather,
+	E_TYPE_SOURCE_EXTENSION)
+
+static void
+source_weather_set_property (GObject *object,
+                             guint property_id,
+                             const GValue *value,
+                             GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_LOCATION:
+			e_source_weather_set_location (
+				E_SOURCE_WEATHER (object),
+				g_value_get_string (value));
+			return;
+
+		case PROP_UNITS:
+			e_source_weather_set_units (
+				E_SOURCE_WEATHER (object),
+				g_value_get_enum (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+source_weather_get_property (GObject *object,
+                             guint property_id,
+                             GValue *value,
+                             GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_LOCATION:
+			g_value_set_string (
+				value,
+				e_source_weather_get_location (
+				E_SOURCE_WEATHER (object)));
+			return;
+
+		case PROP_UNITS:
+			g_value_set_enum (
+				value,
+				e_source_weather_get_units (
+				E_SOURCE_WEATHER (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+source_weather_finalize (GObject *object)
+{
+	ESourceWeatherPrivate *priv;
+
+	priv = E_SOURCE_WEATHER_GET_PRIVATE (object);
+
+	g_free (priv->location);
+
+	/* Chain up to parent's finalize() method. */
+	G_OBJECT_CLASS (e_source_weather_parent_class)->finalize (object);
+}
+
+static void
+e_source_weather_class_init (ESourceWeatherClass *class)
+{
+	GObjectClass *object_class;
+	ESourceExtensionClass *extension_class;
+
+	g_type_class_add_private (class, sizeof (ESourceWeatherPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = source_weather_set_property;
+	object_class->get_property = source_weather_get_property;
+	object_class->finalize = source_weather_finalize;
+
+	extension_class = E_SOURCE_EXTENSION_CLASS (class);
+	extension_class->name = E_SOURCE_EXTENSION_WEATHER_BACKEND;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_LOCATION,
+		g_param_spec_string (
+			"location",
+			"Location",
+			"Weather location code",
+			NULL,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT |
+			E_SOURCE_PARAM_SETTING));
+
+	g_object_class_install_property (
+		object_class,
+		PROP_UNITS,
+		g_param_spec_enum (
+			"units",
+			"Units",
+			"Metric or imperial units",
+			E_TYPE_SOURCE_WEATHER_UNITS,
+			E_SOURCE_WEATHER_UNITS_METRIC,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT |
+			E_SOURCE_PARAM_SETTING));
+}
+
+static void
+e_source_weather_class_finalize (ESourceWeatherClass *class)
+{
+}
+
+static void
+e_source_weather_init (ESourceWeather *extension)
+{
+	extension->priv = E_SOURCE_WEATHER_GET_PRIVATE (extension);
+}
+
+void
+e_source_weather_type_register (GTypeModule *type_module)
+{
+	static const GEnumValue e_source_weather_units_values[] = {
+		{ E_SOURCE_WEATHER_UNITS_METRIC,
+		  "E_SOURCE_WEATHER_UNITS_METRIC",
+		  "metric" },
+		{ E_SOURCE_WEATHER_UNITS_IMPERIAL,
+		  "E_SOURCE_WEATHER_UNITS_IMPERIAL",
+		  "imperial" },
+		{ 0, NULL, NULL }
+	};
+
+	e_source_weather_units_type =
+		g_type_module_register_enum (
+		type_module, "ESourceWeatherUnits",
+		e_source_weather_units_values);
+
+	/* XXX G_DEFINE_DYNAMIC_TYPE declares a static type registration
+	 *     function, so we have to wrap it with a public function in
+	 *     order to register types from a separate compilation unit. */
+	e_source_weather_register_type (type_module);
+}
+
+const gchar *
+e_source_weather_get_location (ESourceWeather *extension)
+{
+	g_return_val_if_fail (E_IS_SOURCE_WEATHER (extension), NULL);
+
+	return extension->priv->location;
+}
+
+void
+e_source_weather_set_location (ESourceWeather *extension,
+                               const gchar *location)
+{
+	g_return_if_fail (E_IS_SOURCE_WEATHER (extension));
+
+	g_free (extension->priv->location);
+	extension->priv->location = g_strdup (location);
+
+	g_object_notify (G_OBJECT (extension), "location");
+}
+
+ESourceWeatherUnits
+e_source_weather_get_units (ESourceWeather *extension)
+{
+	g_return_val_if_fail (E_IS_SOURCE_WEATHER (extension), 0);
+
+	return extension->priv->units;
+}
+
+void
+e_source_weather_set_units (ESourceWeather *extension,
+                            ESourceWeatherUnits units)
+{
+	g_return_if_fail (E_IS_SOURCE_WEATHER (extension));
+
+	extension->priv->units = units;
+
+	g_object_notify (G_OBJECT (extension), "units");
+}
+
+ESourceWeatherUnits
+e_source_weather_units_get_type (void)
+{
+	return e_source_weather_units_type;
+}
diff --git a/modules/cal-config-weather/e-source-weather.h b/modules/cal-config-weather/e-source-weather.h
new file mode 100644
index 0000000..85bb2f3
--- /dev/null
+++ b/modules/cal-config-weather/e-source-weather.h
@@ -0,0 +1,82 @@
+/*
+ * e-source-weather.h
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <webcal://www.gnu.org/licenses/>
+ *
+ */
+
+#ifndef E_SOURCE_WEATHER_H
+#define E_SOURCE_WEATHER_H
+
+#include <libedataserver/e-source-extension.h>
+
+/* Standard GObject macros */
+#define E_TYPE_SOURCE_WEATHER \
+	(e_source_weather_get_type ())
+#define E_SOURCE_WEATHER(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_SOURCE_WEATHER, ESourceWeather))
+#define E_SOURCE_WEATHER_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_SOURCE_WEATHER, ESourceWeatherClass))
+#define E_IS_SOURCE_WEATHER(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_SOURCE_WEATHER))
+#define E_IS_SOURCE_WEATHER_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_SOURCE_WEATHER))
+#define E_SOURCE_WEATHER_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_SOURCE_WEATHER, ESourceWeatherClass))
+
+#define E_TYPE_SOURCE_WEATHER_UNITS \
+	(e_source_weather_units_get_type ())
+
+#define E_SOURCE_EXTENSION_WEATHER_BACKEND "Weather Backend"
+
+G_BEGIN_DECLS
+
+typedef struct _ESourceWeather ESourceWeather;
+typedef struct _ESourceWeatherClass ESourceWeatherClass;
+typedef struct _ESourceWeatherPrivate ESourceWeatherPrivate;
+
+struct _ESourceWeather {
+	ESourceExtension parent;
+	ESourceWeatherPrivate *priv;
+};
+
+struct _ESourceWeatherClass {
+	ESourceExtensionClass parent_class;
+};
+
+typedef enum {
+	E_SOURCE_WEATHER_UNITS_METRIC,
+	E_SOURCE_WEATHER_UNITS_IMPERIAL
+} ESourceWeatherUnits;
+
+GType		e_source_weather_get_type	(void);
+void		e_source_weather_type_register	(GTypeModule *type_module);
+const gchar *	e_source_weather_get_location	(ESourceWeather *extension);
+void		e_source_weather_set_location	(ESourceWeather *extension,
+						 const gchar *location);
+ESourceWeatherUnits
+		e_source_weather_get_units	(ESourceWeather *extension);
+void		e_source_weather_set_units	(ESourceWeather *extension,
+						 ESourceWeatherUnits units);
+
+GType		e_source_weather_units_get_type		(void);
+
+G_END_DECLS
+
+#endif /* E_SOURCE_WEATHER_H */
diff --git a/modules/cal-config-weather/evolution-cal-config-weather.c b/modules/cal-config-weather/evolution-cal-config-weather.c
new file mode 100644
index 0000000..a6820bf
--- /dev/null
+++ b/modules/cal-config-weather/evolution-cal-config-weather.c
@@ -0,0 +1,307 @@
+/*
+ * evolution-cal-config-weather.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#include <config.h>
+#include <glib/gi18n-lib.h>
+
+#include <e-util/e-extension.h>
+#include <misc/e-source-config-backend.h>
+#include <calendar/gui/e-cal-source-config.h>
+
+#define GWEATHER_I_KNOW_THIS_IS_UNSTABLE
+#include <libgweather/location-entry.h>
+#undef GWEATHER_I_KNOW_THIS_IS_UNSTABLE
+
+#include "e-source-weather.h"
+
+typedef ESourceConfigBackend ECalConfigWeather;
+typedef ESourceConfigBackendClass ECalConfigWeatherClass;
+
+/* Module Entry Points */
+void e_module_load (GTypeModule *type_module);
+void e_module_unload (GTypeModule *type_module);
+
+typedef struct _Context Context;
+
+struct _Context {
+	GtkWidget *location_entry;
+	GtkWidget *units_combo;
+};
+
+/* Forward Declarations */
+GType e_cal_config_weather_get_type (void);
+
+G_DEFINE_DYNAMIC_TYPE (
+	ECalConfigWeather,
+	e_cal_config_weather,
+	E_TYPE_SOURCE_CONFIG_BACKEND)
+
+static void
+cal_config_weather_context_free (Context *context)
+{
+	g_object_unref (context->location_entry);
+	g_object_unref (context->units_combo);
+
+	g_slice_free (Context, context);
+}
+
+static gboolean
+cal_config_weather_location_to_string (GBinding *binding,
+                                       const GValue *source_value,
+                                       GValue *target_value,
+                                       gpointer user_data)
+{
+	GWeatherLocation *location;
+	gchar *string = NULL;
+
+	location = g_value_get_pointer (source_value);
+
+	if (location != NULL) {
+		const gchar *code;
+		gchar *city_name;
+
+		code = gweather_location_get_code (location);
+		city_name = gweather_location_get_city_name (location);
+		string = g_strdup_printf ("%s/%s", code, city_name);
+		g_free (city_name);
+	}
+
+	g_value_take_string (target_value, string);
+
+	return TRUE;
+}
+
+/* XXX This is a private libgweather constant.
+ *     The value may change at any time. */
+#define GWEATHER_LOCATION_ENTRY_COL_LOCATION 1
+
+static gboolean
+cal_config_weather_string_to_location (GBinding *binding,
+                                       const GValue *source_value,
+                                       GValue *target_value,
+                                       gpointer user_data)
+{
+	GObject *target;
+	GWeatherLocation *match = NULL;
+	GtkEntryCompletion *completion;
+	GtkTreeModel *model;
+	GtkTreeIter iter;
+	const gchar *string;
+	const gchar *city_name;
+	const gchar *code;
+	gchar **tokens;
+
+	/* XXX This is a bit convoluted because libgweather lacks a
+	 *     GWeatherLocation lookup function.  The algorithm is
+	 *     copied from gweather_location_entry_set_city(). */
+
+	string = g_value_get_string (source_value);
+
+	if (string == NULL)
+		return FALSE;
+
+	/* String is: STATION-CODE '/' CITY-NAME */
+	tokens = g_strsplit (string, "/", 2);
+
+	if (g_strv_length (tokens) != 2) {
+		g_strfreev (tokens);
+		return FALSE;
+	}
+
+	code = tokens[0];
+	city_name = tokens[1];
+
+	target = g_binding_get_target (binding);
+	completion = gtk_entry_get_completion (GTK_ENTRY (target));
+	model = gtk_entry_completion_get_model (completion);
+
+	gtk_tree_model_get_iter_first (model, &iter);
+
+	do {
+		GWeatherLocation *location;
+		const gchar *cmp_code;
+		gchar *cmp_city_name;
+
+		gtk_tree_model_get (
+			model, &iter,
+			GWEATHER_LOCATION_ENTRY_COL_LOCATION,
+			&location, -1);
+
+		/* Does the station code match? */
+		cmp_code = gweather_location_get_code (location);
+		if (g_strcmp0 (code, cmp_code) != 0)
+			continue;
+
+		/* Does the city name match? */
+		cmp_city_name = gweather_location_get_city_name (location);
+		if (g_strcmp0 (city_name, cmp_city_name) != 0) {
+			g_free (cmp_city_name);
+			continue;
+		}
+		g_free (cmp_city_name);
+
+		/* We found a match! */
+		match = location;
+		break;
+
+	} while (gtk_tree_model_iter_next (model, &iter));
+
+	g_value_set_pointer (target_value, match);
+
+	g_strfreev (tokens);
+
+	return TRUE;
+}
+
+static gboolean
+cal_config_weather_allow_creation (ESourceConfigBackend *backend)
+{
+	ESourceConfig *config;
+	ECalSourceConfig *cal_config;
+	ECalSourceType source_type;
+
+	/* No such thing as weather task lists or weather memo lists. */
+
+	config = e_source_config_backend_get_config (backend);
+
+	cal_config = E_CAL_SOURCE_CONFIG (config);
+	source_type = e_cal_source_config_get_source_type (cal_config);
+
+	return (source_type == E_CAL_SOURCE_TYPE_EVENT);
+}
+
+static void
+cal_config_weather_insert_widgets (ESourceConfigBackend *backend,
+                                   ESource *scratch_source)
+{
+	ESourceConfig *config;
+	ESourceExtension *extension;
+	GWeatherLocation *world;
+	GtkWidget *widget;
+	Context *context;
+	const gchar *extension_name;
+	const gchar *uid;
+
+	context = g_slice_new (Context);
+	uid = e_source_get_uid (scratch_source);
+	config = e_source_config_backend_get_config (backend);
+
+	g_object_set_data_full (
+		G_OBJECT (backend), uid, context,
+		(GDestroyNotify) cal_config_weather_context_free);
+
+	world = gweather_location_new_world (TRUE);
+
+	e_cal_source_config_add_offline_toggle (
+		E_CAL_SOURCE_CONFIG (config), scratch_source);
+
+	widget = gweather_location_entry_new (world);
+	e_source_config_insert_widget (
+		config, scratch_source, _("Location:"), widget);
+	context->location_entry = g_object_ref (widget);
+	gtk_widget_show (widget);
+
+	/* This must follow the order of ESourceWeatherUnits. */
+	widget = gtk_combo_box_text_new ();
+	gtk_combo_box_text_append_text (
+		GTK_COMBO_BOX_TEXT (widget),
+		_("Metric (Celsius, cm, etc)"));
+	gtk_combo_box_text_append_text (
+		GTK_COMBO_BOX_TEXT (widget),
+		_("Imperial (Fahrenheit, inches, etc)"));
+	e_source_config_insert_widget (
+		config, scratch_source, _("Units:"), widget);
+	context->units_combo = g_object_ref (widget);
+	gtk_widget_show (widget);
+
+	e_source_config_add_refresh_interval (config, scratch_source);
+
+	gweather_location_unref (world);
+
+	extension_name = E_SOURCE_EXTENSION_WEATHER_BACKEND;
+	extension = e_source_get_extension (scratch_source, extension_name);
+
+	g_object_bind_property_full (
+		extension, "location",
+		context->location_entry, "location",
+		G_BINDING_BIDIRECTIONAL |
+		G_BINDING_SYNC_CREATE,
+		cal_config_weather_string_to_location,
+		cal_config_weather_location_to_string,
+		NULL, (GDestroyNotify) NULL);
+
+	g_object_bind_property (
+		extension, "units",
+		context->units_combo, "active",
+		G_BINDING_BIDIRECTIONAL |
+		G_BINDING_SYNC_CREATE);
+}
+
+static gboolean
+cal_config_weather_check_complete (ESourceConfigBackend *backend,
+                                   ESource *scratch_source)
+{
+	ESourceWeather *extension;
+	const gchar *extension_name;
+	const gchar *location;
+
+	extension_name = E_SOURCE_EXTENSION_WEATHER_BACKEND;
+	extension = e_source_get_extension (scratch_source, extension_name);
+
+	location = e_source_weather_get_location (extension);
+
+	g_debug ("Location: [%s]", location);
+
+	return (location != NULL) && (*location != '\0');
+}
+
+static void
+e_cal_config_weather_class_init (ESourceConfigBackendClass *class)
+{
+	EExtensionClass *extension_class;
+
+	extension_class = E_EXTENSION_CLASS (class);
+	extension_class->extensible_type = E_TYPE_CAL_SOURCE_CONFIG;
+
+	class->backend_name = "weather";
+	class->allow_creation = cal_config_weather_allow_creation;
+	class->insert_widgets = cal_config_weather_insert_widgets;
+	class->check_complete = cal_config_weather_check_complete;
+}
+
+static void
+e_cal_config_weather_class_finalize (ESourceConfigBackendClass *class)
+{
+}
+
+static void
+e_cal_config_weather_init (ESourceConfigBackend *backend)
+{
+}
+
+G_MODULE_EXPORT void
+e_module_load (GTypeModule *type_module)
+{
+	e_source_weather_type_register (type_module);
+	e_cal_config_weather_register_type (type_module);
+}
+
+G_MODULE_EXPORT void
+e_module_unload (GTypeModule *type_module)
+{
+}
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