added: outline for bottom panel struct

src/ui/interactable.rs

@@ -3,16 +3,46 @@ use tcod::input::Event;
 /// Interactables are UI elements that can be interacted with via the mouse.
 /// To realise that, this trait provides the interface for a callback that can handle mouse events.
 trait Interactable {
-
     /// Returns the element layout (min_x, min_y, max_x, max_y) as absolute screen coordinates.
-    fn get_layout_abs() -> (i32, i32, i32, i32);
+    fn get_layout_abs(&self) -> (i32, i32, i32, i32);
 
     /// Returns the element layout (min_x, min_y, max_x, max_y) as coordinates relative to the
     /// parent interactable. If there is no parent interactable this is identical to
     /// `get_layout_abs()`
-    fn get_layout_rel() -> (i32, i32, i32, i32);
+    fn get_layout_rel(&self) -> (i32, i32, i32, i32);
 
     /// Handle a mouse event.
     // TODO: How to do different return values, e.g.: selected option or no return values?
-    fn callback(event: Event::Mouse);
-}
+    fn callback(&self, event: Event);
+}
+
+pub struct BottomPanel {
+    ui_elements: Vec<Box<dyn Interactable>>,
+}
+
+impl BottomPanel {
+    fn new() -> Self {
+        BottomPanel {
+            ui_elements: Vec::new(),
+        }
+    }
+}
+
+impl Interactable for BottomPanel {
+    fn get_layout_abs(&self) -> (i32, i32, i32, i32) {
+        unimplemented!()
+    }
+
+    fn get_layout_rel(&self) -> (i32, i32, i32, i32) {
+        unimplemented!()
+    }
+
+    fn callback(&self, event: Event) {
+        // unimplemented!()
+        if let Event::Mouse(m) = event {
+            if m.lbutton_pressed {
+                unimplemented!()
+            }
+        }
+    }
+}