make preview_charts a Vec instead of an HashMap

src/chart/types/preview_chart.rs

@@ -44,13 +44,18 @@ pub fn update_charts_data(&mut self, packets: u128) {
         let packets_entry = packets as f32;
         let packets_point = (tot_seconds, packets_entry);
 
-        // update sent bytes traffic data
+        // update traffic data
         self.packets.update_series(packets_point, true, false);
         self.max_packets = self.packets.get_max();
     }
 
     pub fn view(&self) -> Element<'_, Message, StyleType> {
-        Column::new().height(40).push(ChartWidget::new(self)).into()
+        if self.max_packets > 0.0 {
+            Column::new().height(40).push(ChartWidget::new(self))
+        } else {
+            Column::new()
+        }
+        .into()
     }
 
     pub fn change_style(&mut self, style: StyleType) {

src/gui/pages/initial_page.rs

@@ -178,7 +178,7 @@ fn get_col_adapter(
 ) -> Column<'_, Message, StyleType> {
     let mut dev_str_list = vec![];
     // TODO: do not iterate here
-    for (_, (my_dev, _)) in &sniffer.preview_charts {
+    for (my_dev, _) in &sniffer.preview_charts {
         let mut title = String::new();
         #[allow(unused_mut)]
         let mut subtitle: Option<&String> = None;
@@ -233,7 +233,10 @@ fn get_col_adapter(
                         } else {
                             Some(Text::new(addrs).font(font))
                         };
-                        let my_device_chart = sniffer.preview_charts.get(name);
+                        let my_device_chart = sniffer
+                            .preview_charts
+                            .iter()
+                            .find(|(dev, _)| dev.get_name().eq(name));
                         scroll_adapters.push(
                             Button::new(
                                 Column::new()

src/gui/sniffer.rs

@@ -102,8 +102,7 @@ pub struct Sniffer {
     /// Traffic chart displayed in the Overview page
     pub traffic_chart: TrafficChart,
     /// Traffic preview charts displayed in the initial page
-    // TODO: make this a Vec<(MyDevice, PreviewChart)> to keep the order of the devices consistent
-    pub preview_charts: HashMap<String, (MyDevice, PreviewChart)>,
+    pub preview_charts: Vec<(MyDevice, PreviewChart)>,
     /// Currently displayed modal; None if no modal is displayed
     pub modal: Option<MyModal>,
     /// Currently displayed settings page; None if settings is closed
@@ -158,7 +157,7 @@ pub fn new(conf: Conf) -> Self {
             pcap_error: None,
             dots_pulse: (".".to_string(), 0),
             traffic_chart: TrafficChart::new(style, language, data_repr),
-            preview_charts: HashMap::new(),
+            preview_charts: Vec::new(),
             modal: None,
             settings_page: None,
             running_page: None,
@@ -634,20 +633,34 @@ pub fn update(&mut self, message: Message) -> Task<Message> {
                 }
             }
             Message::TrafficPreview(msg) => {
-                // TODO: remove or hide inactive devices
+                self.preview_charts.retain(|(my_dev, _)| {
+                    msg.data
+                        .iter()
+                        .any(|(d, _)| d.get_name().eq(my_dev.get_name()))
+                });
                 for (dev, packets) in msg.data {
-                    self.preview_charts
-                        .entry(dev.get_name().clone())
-                        .and_modify(|(my_dev, chart)| {
-                            *my_dev = dev.clone();
-                            chart.update_charts_data(packets);
-                        })
-                        .or_insert({
+                    let Some((my_dev, chart)) = self
+                        .preview_charts
+                        .iter_mut()
+                        .find(|(my_dev, _)| my_dev.get_name().eq(dev.get_name()))
+                    else {
                         let mut chart = PreviewChart::new(self.conf.settings.style);
                         chart.update_charts_data(packets);
-                            (dev, chart)
-                        });
+                        self.preview_charts.push((dev, chart));
+                        continue;
+                    };
+                    *my_dev = dev.clone();
+                    chart.update_charts_data(packets);
                 }
+                self.preview_charts.sort_by(|(_, c1), (_, c2)| {
+                    if c1.max_packets > 0.0 && c2.max_packets == 0.0 {
+                        std::cmp::Ordering::Less
+                    } else if c1.max_packets == 0.0 && c2.max_packets > 0.0 {
+                        std::cmp::Ordering::Greater
+                    } else {
+                        std::cmp::Ordering::Equal
+                    }
+                });
             }
         }
         Task::none()
@@ -891,7 +904,9 @@ fn reset(&mut self) {
         // increment capture id to ignore pending messages from previous captures
         self.current_capture_rx = (self.current_capture_rx.0 + 1, None);
         self.info_traffic = InfoTraffic::default();
-        self.preview_charts = HashMap::new();
+        self.preview_charts
+            .iter_mut()
+            .for_each(|(_, chart)| *chart = PreviewChart::new(style));
         self.addresses_resolved = HashMap::new();
         self.favorite_hosts = HashSet::new();
         self.logged_notifications = (VecDeque::new(), 0);
@@ -910,7 +925,7 @@ fn reset(&mut self) {
     }
 
     fn set_device(&mut self, name: &str) {
-        for (_, (my_dev, _)) in &self.preview_charts {
+        for (my_dev, _) in &self.preview_charts {
             if my_dev.get_name().eq(&name) {
                 self.conf.device.device_name = name.to_string();
                 self.capture_source = CaptureSource::Device(my_dev.clone());
@@ -1177,7 +1192,7 @@ pub fn is_capture_source_consistent(&self) -> bool {
     fn change_charts_style(&mut self) {
         let style = self.conf.settings.style;
         self.traffic_chart.change_style(style);
-        for (_, chart) in self.preview_charts.values_mut() {
+        for (_, chart) in &mut self.preview_charts {
             chart.change_style(style);
         }
     }

src/networking/traffic_preview.rs

@@ -75,6 +75,7 @@ fn handle_devices_and_previews(
             continue;
         }
         data.insert(dev_name.clone(), 0);
+        traffic_preview.data.push((my_dev.clone(), 0));
         let mut freeze_rx = freeze_tx.subscribe();
         let pcap_tx = pcap_tx.clone();
         let capture_source = CaptureSource::Device(my_dev);