add button for netplay discord (#452)

src/ui/gui.rs

@@ -87,6 +87,10 @@ fn netplay_window(app: &AppWindow, controller_paths: &[Option<String>]) {
             })
             .unwrap();
     });
+
+    app.on_netplay_discord_button_clicked(move || {
+        open::that_detached("https://discord.gg/JyW6ZgBUyS").unwrap();
+    });
 }
 
 fn local_game_window(app: &AppWindow, controller_paths: &[Option<String>]) {

src/ui/gui/appwindow.slint

@@ -26,6 +26,7 @@ export component AppWindow inherits Window {
     callback input_profile_button_clicked;
     callback create_session_button_clicked;
     callback join_session_button_clicked;
+    callback netplay_discord_button_clicked;
     in property version <=> AboutData.version;
     in property has_update <=> AboutData.has_update;
     in-out property integer_scaling <=> SettingsData.integer_scaling;
@@ -83,6 +84,9 @@ export component AppWindow inherits Window {
             join_session_button_clicked => {
                 join_session_button_clicked();
             }
+            netplay_discord_button_clicked => {
+                netplay_discord_button_clicked();
+            }
         }
         if(side-bar.current-item == 3): Settings { }
         if(side-bar.current-item == 4): About {

src/ui/gui/netplay_page.slint

@@ -36,6 +36,7 @@ export component NetplayDialog inherits Dialog {
 export component Netplay inherits Page {
     callback create_session_button_clicked;
     callback join_session_button_clicked;
+    callback netplay_discord_button_clicked;
     title: @tr("Netplay");
 
     VerticalBox {
@@ -59,5 +60,15 @@ export component Netplay inherits Page {
                 }
             }
         }
+
+        HorizontalBox {
+            alignment: center;
+            Button {
+                text: @tr("Netplay Discord Channel");
+                clicked => {
+                    netplay_discord_button_clicked();
+                }
+            }
+        }
     }
 }