Resolve warnings in the hex-grid app

hex-grid/src/bin/icon.rs

@@ -1,7 +1,5 @@
-use gtk::prelude::*;
-
 fn main() {
-    gtk::init();
+    let _ = gtk::init();
     for name in gtk::IconTheme::new().icon_names() {
         println!("{}", name);
     }

hex-grid/src/main.rs

@@ -10,10 +10,9 @@ Luminescent Dreams Tools is distributed in the hope that it will be useful, but
 You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
 */
 
-use cairo::Context;
 use coordinates::{hex_map::parse_data, AxialAddr};
 use gio::resources_lookup_data;
-use glib::{subclass::InitializingObject, Object};
+use glib::Object;
 use gtk::{gio, prelude::*, subclass::prelude::*, Application, DrawingArea};
 use image::io::Reader as ImageReader;
 use std::{cell::RefCell, io::Cursor, rc::Rc};
@@ -23,7 +22,7 @@ mod palette_entry;
 mod tile;
 mod utilities;
 
-const APP_ID: &'static str = "com.luminescent-dreams.hex-grid";
+const APP_ID: &str = "com.luminescent-dreams.hex-grid";
 const HEX_RADIUS: f64 = 50.;
 const MAP_RADIUS: usize = 3;
 const DRAWING_ORIGIN: (f64, f64) = (1024. / 2., 768. / 2.);
@@ -178,14 +177,14 @@ impl ObjectImpl for HexGridWindowPrivate {
                 let norm_x = x - DRAWING_ORIGIN.0;
                 let norm_y = y - DRAWING_ORIGIN.1;
                 let q = (2. / 3. * norm_x) / HEX_RADIUS;
-                let r = (-1. / 3. * norm_x + (3. as f64).sqrt() / 3. * norm_y) / HEX_RADIUS;
+                let r = (-1. / 3. * norm_x + (3_f64).sqrt() / 3. * norm_y) / HEX_RADIUS;
 
                 let (q, r) = axial_round(q, r);
                 let coordinate = AxialAddr::new(q, r);
                 canvas_address.set_value(&format!("{:.0} {:.0}", x, y));
 
                 if coordinate.distance(&AxialAddr::origin()) > MAP_RADIUS {
-                    hex_address.set_value(&format!("-----"));
+                    hex_address.set_value("-----");
                     *c.borrow_mut() = None;
                 } else {
                     hex_address.set_value(&format!("{:.0} {:.0}", coordinate.q(), coordinate.r()));
@@ -209,10 +208,10 @@ impl ObjectImpl for HexGridWindowPrivate {
                         DRAWING_ORIGIN.0 + HEX_RADIUS * (3. / 2. * (coordinate.q() as f64));
                     let center_y = DRAWING_ORIGIN.1
                         + HEX_RADIUS
-                            * ((3. as f64).sqrt() / 2. * (coordinate.q() as f64)
+                            * ((3_f64).sqrt() / 2. * (coordinate.q() as f64)
-                                + (3. as f64).sqrt() * (coordinate.r() as f64));
+                                + (3_f64).sqrt() * (coordinate.r() as f64));
                     let translate_x = center_x - HEX_RADIUS;
-                    let translate_y = center_y - (3. as f64).sqrt() * HEX_RADIUS / 2.;
+                    let translate_y = center_y - (3_f64).sqrt() * HEX_RADIUS / 2.;
 
                     let tile = match hex_map.get(&coordinate).unwrap() {
                         tile::Terrain::Mountain => &mountain,
@@ -249,10 +248,11 @@ impl HexGridWindow {
     }
 }
 
+/*
 fn draw_hexagon(context: &Context, center_x: f64, center_y: f64, radius: f64) {
     let ul_x = center_x - radius;
-    let ul_y = center_y - (3. as f64).sqrt() * radius / 2.;
+    let ul_y = center_y - (3_f64).sqrt() * radius / 2.;
-    let points: Vec<(f64, f64)> = utilities::hexagon(radius * 2., (3. as f64).sqrt() * radius);
+    let points: Vec<(f64, f64)> = utilities::hexagon(radius * 2., (3_f64).sqrt() * radius);
     context.new_path();
     context.move_to(ul_x + points[0].0, ul_y + points[0].1);
     context.line_to(ul_x + points[1].0, ul_y + points[1].1);
@@ -262,6 +262,7 @@ fn draw_hexagon(context: &Context, center_x: f64, center_y: f64, radius: f64) {
     context.line_to(ul_x + points[5].0, ul_y + points[5].1);
     context.close_path();
 }
+*/
 
 fn axial_round(q_f64: f64, r_f64: f64) -> (i32, i32) {
     let s_f64 = -q_f64 - r_f64;

hex-grid/src/utilities.rs

@@ -27,20 +27,20 @@ pub fn hexagon(width: f64, height: f64) -> Vec<(f64, f64)> {
         (center_x + radius, center_y),
         (
             center_x + radius / 2.,
-            center_y + (3. as f64).sqrt() * radius / 2.,
+            center_y + (3_f64).sqrt() * radius / 2.,
         ),
         (
             center_x - radius / 2.,
-            center_y + (3. as f64).sqrt() * radius / 2.,
+            center_y + (3_f64).sqrt() * radius / 2.,
         ),
         (center_x - radius, center_y),
         (
             center_x - radius / 2.,
-            center_y - (3. as f64).sqrt() * radius / 2.,
+            center_y - (3_f64).sqrt() * radius / 2.,
         ),
         (
             center_x + radius / 2.,
-            center_y - (3. as f64).sqrt() * radius / 2.,
+            center_y - (3_f64).sqrt() * radius / 2.,
         ),
     ]
 }