Improve session controls and GUI views

crates/xserial-gui/src/panels/hex_view.rs

@@ -0,0 +1,41 @@
+use crate::app::DisplayOptions;
+use crate::buffers::{HexBuffer, LineDirection};
+use egui::{ScrollArea, Ui};
+
+pub fn render(ui: &mut Ui, buf: &HexBuffer, display: DisplayOptions) {
+    let mut lines = buf.iter().peekable();
+    if lines.peek().is_none() {
+        ui.label("no hex data");
+        return;
+    }
+    ScrollArea::vertical().stick_to_bottom(true).show(ui, |ui| {
+        for line in lines {
+            let mut prefix = Vec::new();
+            if display.show_timestamp {
+                let ts = line.elapsed.as_secs_f64();
+                let time = if ts < 60.0 {
+                    format!("{:05.2}", ts)
+                } else {
+                    format!("{:02}:{:02}", (ts / 60.0) as u64, (ts % 60.0) as u64)
+                };
+                prefix.push(format!("[{time}]"));
+            }
+            if display.show_direction {
+                let dir = match line.direction {
+                    LineDirection::In => "IN",
+                    LineDirection::Out => "OUT",
+                };
+                prefix.push(format!("[{dir}]"));
+            }
+            if display.show_pipeline {
+                prefix.push(format!("[{}]", line.pipeline));
+            }
+            let prefix = if prefix.is_empty() {
+                String::new()
+            } else {
+                format!("{} ", prefix.join(" "))
+            };
+            ui.monospace(format!("{prefix}{}  |{}|", line.hex, line.ascii));
+        }
+    });
+}