Add simple popup

godot/scenes/main.tscn

@@ -2,7 +2,7 @@
 
 [ext_resource type="PackedScene" uid="uid://bbmc2gmy7g8ag" path="res://scenes/misc/menu_player.tscn" id="1_o5qli"]
 
-[node name="menu" type="MainMenu" unique_id=2036763876 node_paths=PackedStringArray("camera", "main_position", "host_position", "main_panel", "host_panel", "join_panel", "host_port", "join_addr")]
+[node name="menu" type="MainMenu" unique_id=2036763876 node_paths=PackedStringArray("camera", "main_position", "host_position", "main_panel", "host_panel", "join_panel", "host_port", "join_addr", "popup_panel", "popup_title", "popup_text", "popup_button")]
 camera = NodePath("camera_3d")
 main_position = NodePath("main_pos")
 host_position = NodePath("host_pos")
@@ -11,6 +11,10 @@ host_panel = NodePath("host_panel")
 join_panel = NodePath("join_panel")
 host_port = NodePath("host_panel/v_box_container/host_port")
 join_addr = NodePath("join_panel/v_box_container/address_text")
+popup_panel = NodePath("popup_panel")
+popup_title = NodePath("popup_panel/v_box_container/title")
+popup_text = NodePath("popup_panel/v_box_container/text")
+popup_button = NodePath("popup_panel/v_box_container/ok")
 
 [node name="camera_3d" type="Camera3D" parent="." unique_id=1513321931]
 transform = Transform3D(0.98629165, -0.031186381, 0.16203775, -1.4054481e-08, 0.981978, 0.1889952, -0.16501158, -0.18640438, 0.9685167, 1.0974052, 1.7166122, 1.4909106)
@@ -176,6 +180,55 @@ transform = Transform3D(0.98629165, -0.031186387, 0.16203767, -1.4054484e-08, 0.
 [node name="host_pos" type="Node3D" parent="." unique_id=663794107]
 transform = Transform3D(0.3960592, -0.17354009, 0.90167665, -1.9851193e-08, 0.981978, 0.18899521, -0.9182249, -0.0748533, 0.38892144, -1.0602233, 1.7166122, 3.759781)
 
+[node name="popup_panel" type="Panel" parent="." unique_id=1792775604]
+visible = false
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -153.0
+offset_top = -71.0
+offset_right = 153.0
+offset_bottom = 71.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="v_box_container" type="VBoxContainer" parent="popup_panel" unique_id=465766643]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -20.0
+offset_top = -20.0
+offset_right = 20.0
+offset_bottom = 20.0
+grow_horizontal = 2
+grow_vertical = 2
+alignment = 1
+
+[node name="title" type="Label" parent="popup_panel/v_box_container" unique_id=1944397487]
+layout_mode = 2
+size_flags_horizontal = 4
+theme_override_font_sizes/font_size = 25
+text = "Some Title"
+horizontal_alignment = 1
+
+[node name="text" type="Label" parent="popup_panel/v_box_container" unique_id=1988165424]
+custom_minimum_size = Vector2(300, 0)
+custom_maximum_size = Vector2(300, -1)
+layout_mode = 2
+size_flags_horizontal = 4
+text = "Some text"
+horizontal_alignment = 1
+autowrap_mode = 3
+
+[node name="ok" type="Button" parent="popup_panel/v_box_container" unique_id=488898874]
+layout_mode = 2
+text = "Ok"
+
 [connection signal="pressed" from="main_panel/v_box_container/host" to="." method="go_to_host_game"]
 [connection signal="pressed" from="main_panel/v_box_container/join" to="." method="go_to_join_game"]
 [connection signal="pressed" from="main_panel/v_box_container/quit" to="." method="quit_game"]
@@ -183,3 +236,4 @@ transform = Transform3D(0.3960592, -0.17354009, 0.90167665, -1.9851193e-08, 0.98
 [connection signal="pressed" from="host_panel/v_box_container/back" to="." method="go_to_main_menu"]
 [connection signal="pressed" from="join_panel/v_box_container/join" to="." method="join_game"]
 [connection signal="pressed" from="join_panel/v_box_container/back" to="." method="go_to_main_menu"]
+[connection signal="pressed" from="popup_panel/v_box_container/ok" to="." method="hide_popup"]

rust/src/net/network_manager.rs

@@ -106,6 +106,20 @@ impl INode for NetworkManager {
             }
 
             while let Some(message) = self.poll() {
+                match &message {
+                    PeerMessage::Disconnected(_, connection_error) => {
+                        if !self.is_host() {
+                            let message = if let Some(err) = connection_error {
+                                format!("{}", err)
+                            } else {
+                                String::new()
+                            };
+                            self.signals().on_client_disconnected().emit(&message);
+                        }
+                    }
+                    _ => {}
+                }
+
                 self.handle_message(message);
             }
         }
@@ -116,6 +130,8 @@ impl INode for NetworkManager {
 impl NetworkManager {
     #[signal]
     pub fn lobby_joined();
+    #[signal]
+    pub fn on_client_disconnected(error: GString);
 
     fn poll(&mut self) -> Option<PeerMessage<Package>> {
         let mut cli = CommandLinePanel::singleton();

rust/src/ui/main_menu.rs

@@ -1,5 +1,5 @@
 use godot::{
-    classes::{Camera3D, Panel, SpinBox, TextEdit},
+    classes::{Button, Camera3D, Label, Panel, SpinBox, TextEdit},
     prelude::*,
     register::property::SimpleVar,
 };
@@ -40,6 +40,15 @@ pub struct MainMenu {
     #[export]
     join_addr: Option<Gd<TextEdit>>,
 
+    #[export]
+    popup_panel: Option<Gd<Panel>>,
+    #[export]
+    popup_title: Option<Gd<Label>>,
+    #[export]
+    popup_text: Option<Gd<Label>>,
+    #[export]
+    popup_button: Option<Gd<Button>>,
+
     #[export]
     current_menu: Menu,
 
@@ -50,6 +59,22 @@ pub struct MainMenu {
 
 #[godot_api]
 impl INode3D for MainMenu {
+    fn ready(&mut self) {
+        self.hide_popup();
+
+        NetworkManager::singleton()
+            .bind_mut()
+            .signals()
+            .on_client_disconnected()
+            .connect_other(self, |s, msg| {
+                if msg.is_empty() {
+                    s.show_popup("Disconnected", "disconnected", true);
+                } else {
+                    s.show_popup("Error", &msg.to_string(), true);
+                }
+            });
+    }
+
     fn process(&mut self, _delta: f64) {
         if let Some(camera) = &mut self.camera {
             let target = match self.current_menu {
@@ -123,10 +148,16 @@ impl MainMenu {
 
     #[func]
     pub fn join_game(&mut self) {
-        if let Some(addr) = &self.join_addr {
+        if let Some(addr) = self.join_addr.clone() {
-            if let Ok(addr) = addr.get_text().to_string().parse() {
+            self.show_popup("Joining", "joining game", false);
+            match addr.get_text().to_string().parse() {
+                Ok(addr) => {
                     NetworkManager::singleton().bind_mut().join(addr);
                 }
+                Err(err) => {
+                    self.show_popup("Error", &format!("Error joining: {}", err), true);
+                }
+            }
         }
     }
 
@@ -149,4 +180,26 @@ impl MainMenu {
     pub fn quit_game(&mut self) {
         self.base().get_tree().quit();
     }
+
+    pub fn show_popup(&mut self, title: &str, text: &str, ok: bool) {
+        if let Some(panel) = &mut self.popup_panel {
+            panel.set_visible(true);
+            if let Some(title_label) = &mut self.popup_title {
+                title_label.set_text(title);
+            }
+            if let Some(text_label) = &mut self.popup_text {
+                text_label.set_text(text);
+            }
+            if let Some(button) = &mut self.popup_button {
+                button.set_visible(ok);
+            }
+        }
+    }
+
+    #[func]
+    pub fn hide_popup(&mut self) {
+        if let Some(panel) = &mut self.popup_panel {
+            panel.set_visible(false);
+        }
+    }
 }