Add simple command line interface

godot/scenes/main.tscn

@@ -12,3 +12,38 @@ mesh = SubResource("BoxMesh_m77kh")
 
 [node name="DirectionalLight3D" type="DirectionalLight3D" parent="." unique_id=75522463]
 transform = Transform3D(0.61237246, -0.5, 0.61237246, 0.3535534, 0.8660254, 0.3535534, -0.7071068, 0, 0.7071068, 0, 1, 2)
+
+[node name="CommandLinePanel" type="CommandLinePanel" parent="." unique_id=398519161 node_paths=PackedStringArray("input_field", "text_field", "scroll_container")]
+input_field = NodePath("InputField")
+text_field = NodePath("ScrollContainer/TextField")
+scroll_container = NodePath("ScrollContainer")
+anchors_preset = 10
+anchor_right = 1.0
+offset_bottom = 307.0
+grow_horizontal = 2
+
+[node name="InputField" type="TextEdit" parent="CommandLinePanel" unique_id=485869737]
+layout_mode = 1
+anchors_preset = 10
+anchor_right = 1.0
+offset_top = 307.0
+offset_bottom = 342.0
+grow_horizontal = 2
+text = "Hello there!"
+
+[node name="ScrollContainer" type="ScrollContainer" parent="CommandLinePanel" unique_id=910897176]
+custom_minimum_size = Vector2(-1, 0)
+layout_mode = 1
+anchors_preset = 10
+anchor_right = 1.0
+offset_left = 1.0
+offset_right = -1.0
+offset_bottom = 292.0
+grow_horizontal = 2
+
+[node name="TextField" type="Label" parent="CommandLinePanel/ScrollContainer" unique_id=2111638471]
+custom_minimum_size = Vector2(1150, 0)
+custom_maximum_size = Vector2(1150, -1)
+layout_mode = 2
+vertical_alignment = 2
+clip_text = true

rust/src/lib.rs

@@ -1,5 +1,7 @@
 use godot::prelude::*;
 
+mod ui;
+
 struct MyExtension;
 
 #[gdextension]
@@ -14,7 +16,6 @@ struct NetworkManager {
 #[godot_api]
 impl INode for NetworkManager {
     fn init(base: Base<Node>) -> Self {
-        godot_print!("Hello, world!");
         NetworkManager { base }
     }
 }

rust/src/ui/cmd.rs

@@ -0,0 +1,70 @@
+use godot::classes::ScrollContainer;
+use godot::prelude::*;
+
+use godot::{
+    classes::{IPanel, Label, Panel, TextEdit},
+    global::godot_print,
+    obj::Base,
+    register::{GodotClass, godot_api},
+};
+
+#[derive(GodotClass)]
+#[class(base=Panel)]
+struct CommandLinePanel {
+    #[export]
+    pub input_field: Option<Gd<TextEdit>>,
+    #[export]
+    pub text_field: Option<Gd<Label>>,
+    #[export]
+    pub scroll_container: Option<Gd<ScrollContainer>>,
+
+    scroll_next_update: bool,
+
+    base: Base<Panel>,
+}
+
+#[godot_api]
+impl IPanel for CommandLinePanel {
+    fn init(base: Base<Panel>) -> Self {
+        CommandLinePanel {
+            input_field: None,
+            text_field: None,
+            scroll_container: None,
+            scroll_next_update: false,
+            base,
+        }
+    }
+
+    fn process(&mut self, _delta: f64) {
+        if let Some(scroll) = &mut self.scroll_container
+            && self.scroll_next_update
+        {
+            scroll.set_v_scroll(i32::MAX);
+            self.scroll_next_update = false;
+        }
+
+        if let Some(input) = self.input_field.clone() {
+            let text = input.get_text();
+            if text.contains("\n") {
+                let parts = text.split("\n");
+                let first = parts.get(0).unwrap();
+                self.publish_message(first.to_string());
+                self.input_field.as_mut().unwrap().clear();
+                self.scroll_next_update = true;
+            }
+        }
+    }
+}
+
+impl CommandLinePanel {
+    pub fn publish_message(&mut self, message: String) {
+        if let Some(field) = &mut self.text_field {
+            let mut text = field.get_text().to_string();
+            if !text.is_empty() {
+                text += "\n";
+            }
+            text += &message;
+            field.set_text(&text);
+        }
+    }
+}

rust/src/ui/mod.rs

@@ -0,0 +1 @@
+mod cmd;