panel: Add weather widget

data/css/default.css

@@ -41,6 +41,18 @@
     padding-left: 0px;
 }
 
+.wf-panel .weather image {
+    -gtk-icon-size: 25px;
+    padding-left: 4px;
+    padding-right: 4px;
+    padding-bottom: 4px;
+}
+
+.wf-panel .weather label {
+    font-weight: bold;
+    font-size: 20px;
+}
+
 .wf-panel .network label {
     padding-left: 6px;
 }

metadata/panel.xml

@@ -98,6 +98,13 @@
 	</option>
 	</group>
 	<group>
+	<_short>Weather</_short>
+	<option name="weather_font" type="string">
+		<_short>Weather Font</_short>
+		<default>default</default>
+	</option>
+	</group>
+	<group>
 	<_short>Battery</_short>
 	<option name="battery_status" type="string">
 		<_short>Battery Status</_short>

src/panel/meson.build

@@ -2,6 +2,7 @@ widget_sources = [
   'widgets/battery.cpp',
   'widgets/menu.cpp',
   'widgets/clock.cpp',
+  'widgets/weather.cpp',
   'widgets/command-output.cpp',
   'widgets/language.cpp',
   'widgets/launchers.cpp',

src/panel/panel.cpp

@@ -19,6 +19,7 @@
 #include "widgets/language.hpp"
 #include "widgets/menu.hpp"
 #include "widgets/clock.hpp"
+#include "widgets/weather.hpp"
 #include "widgets/launchers.hpp"
 #include "widgets/network.hpp"
 #include "widgets/spacing.hpp"
@@ -148,6 +149,11 @@ class WayfirePanel::impl
             return Widget(new WayfireClock());
         }
 
+        if (name == "weather")
+        {
+            return Widget(new WayfireWeather());
+        }
+
         if (name == "network")
         {
             return Widget(new WayfireNetworkInfo());
@@ -384,6 +390,7 @@ void WayfirePanelApp::on_activate()
 
     new CssFromConfigFont("panel/battery_font", ".battery {", "}");
     new CssFromConfigFont("panel/clock_font", ".clock {", "}");
+    new CssFromConfigFont("panel/weather_font", ".weather {", "}");
 }
 
 void WayfirePanelApp::handle_new_output(WayfireOutput *output)

src/panel/widgets/weather.cpp

@@ -0,0 +1,75 @@
+#include <iostream>
+#include <fstream>
+#include <glibmm.h>
+#include "weather.hpp"
+#include "wayfire/nonstd/json.hpp"
+
+void WayfireWeather::init(Gtk::Box *container)
+{
+    label.set_justify(Gtk::Justification::CENTER);
+    box.get_style_context()->add_class("weather");
+    box.prepend(label);
+    box.append(icon);
+    container->append(box);
+
+    update_weather();
+
+    timeout = Glib::signal_timeout().connect_seconds(
+        sigc::mem_fun(*this, &WayfireWeather::update_weather), 600);
+}
+
+bool WayfireWeather::update_weather()
+{
+    std::string weather_data_dir;
+
+    weather_data_dir = std::string(getenv("HOME")) + "/.local/share/owf/data";
+
+    std::string file_path = weather_data_dir + "/data.json";
+
+    std::ifstream input_file(file_path);
+
+    if (!input_file)
+    {
+        std::cerr << "Error reading json file " << file_path << std::endl;
+        return false;
+    }
+
+    std::stringstream buf;
+    buf << input_file.rdbuf();
+
+    wf::json_t json_data;
+
+    auto err = wf::json_t::parse_string(buf.str(), json_data);
+
+    if (err.has_value())
+    {
+        std::cerr << "Error parsing json data " << file_path << ": " << *err << std::endl;
+        return false;
+    }
+
+    if (!json_data.has_member("temp") || !json_data.has_member("icon"))
+    {
+        std::cerr << "Unexpected weather json data in " << file_path << std::endl;
+        return false;
+    }
+
+    update_label(json_data["temp"]);
+    update_icon(json_data["icon"]);
+
+    return true;
+}
+
+void WayfireWeather::update_label(std::string temperature)
+{
+    label.set_text(temperature);
+}
+
+void WayfireWeather::update_icon(std::string path)
+{
+    icon.set(path);
+}
+
+WayfireWeather::~WayfireWeather()
+{
+    timeout.disconnect();
+}

src/panel/widgets/weather.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "../widget.hpp"
+#include "wf-popover.hpp"
+#include <gtkmm/label.h>
+#include <gtkmm/image.h>
+
+class WayfireWeather : public WayfireWidget
+{
+    Gtk::Label label;
+    Gtk::Image icon;
+    Gtk::Box box;
+
+    sigc::connection timeout;
+
+  public:
+    void init(Gtk::Box *container) override;
+    bool update_weather();
+    void update_label(std::string);
+    void update_icon(std::string);
+    ~WayfireWeather();
+};