feat(info): add info diag

Cargo.toml

@@ -25,3 +25,4 @@ libpt = { version = "0.6.0", features = ["cli"] }
 clap = { version = "4.5.15", features = ["derive"] }
 image = "0.25.2"
 rand = "0.8.5"
+rfd = "0.14.1"

src/app.rs

@@ -1,6 +1,7 @@
 use clap::Parser;
 use egui::IconData;
 use libpt::cli::args::{VerbosityLevel, HELP_TEMPLATE};
+use libpt::log::{debug, trace};
 
 pub const TITLE: &str = "Rollator";
 
@@ -21,6 +22,10 @@ pub struct RollatorApp {
     #[serde(skip)]
     #[command(flatten)]
     pub(crate) verbosity: VerbosityLevel,
+
+    #[serde(skip)]
+    #[clap(skip)]
+    show_info_window: bool,
 }
 
 impl Default for RollatorApp {
@@ -29,6 +34,7 @@ impl Default for RollatorApp {
             label: TITLE.to_owned(),
             value: 2.7,
             verbosity: VerbosityLevel::INFO,
+            show_info_window: false,
         }
     }
 }
@@ -54,6 +60,46 @@ impl RollatorApp {
     pub fn new_with_cli() -> Self {
         Self::parse()
     }
+
+    pub fn info_diag(&mut self, ctx: &egui::Context) {
+        trace!("rendering info dialogue");
+        ctx.show_viewport_immediate(
+            egui::ViewportId::from_hash_of("immediate_viewport"),
+            egui::ViewportBuilder::default()
+                .with_title("Immediate Viewport")
+                .with_inner_size([200.0, 100.0]),
+            |ctx, class| {
+                assert!(
+                    class == egui::ViewportClass::Immediate,
+                    "This egui backend doesn't support multiple viewports"
+                );
+
+                egui::CentralPanel::default().show(ctx, |ui| {
+                    ui.label(TITLE.to_string());
+                    ui.hyperlink_to("Source Code\n", env!("CARGO_PKG_REPOSITORY"));
+                    ui.label(format!("Author: {}", env!("CARGO_PKG_AUTHORS")));
+                    ui.label(format!("License: {}", env!("CARGO_PKG_LICENSE")));
+
+                    ////////////////////////////////////////////////////////////////
+
+                    ui.label("\nPowered by ");
+                    ui.hyperlink_to("egui", "https://github.com/emilk/egui");
+                    ui.label(" and ");
+                    ui.hyperlink_to(
+                        "eframe",
+                        "https://github.com/emilk/egui/tree/master/crates/eframe",
+                    );
+                    ui.label(".");
+
+                    ////////////////////////////////////////////////////////////////
+                });
+                if ctx.input(|i| i.viewport().close_requested()) {
+                    // Tell parent viewport that we should not show next frame:
+                    self.show_info_window = false;
+                }
+            },
+        );
+    }
 }
 
 impl eframe::App for RollatorApp {
@@ -78,10 +124,9 @@ impl eframe::App for RollatorApp {
                         if ui.button("Quit").clicked() {
                             ctx.send_viewport_cmd(egui::ViewportCommand::Close);
                         }
-                    });
-                    ui.menu_button("AAAA", |ui| {
-                        if ui.button("Quit").clicked() {
-                            ctx.send_viewport_cmd(egui::ViewportCommand::Close);
+                        if ui.button("Info").clicked() || self.show_info_window {
+                            self.show_info_window = true;
+                            self.info_diag(ctx);
                         }
                     });
                     ui.add_space(16.0);