basic inventory system ready

inv_system/item_slot.gd

@@ -0,0 +1,41 @@
+extends Panel
+
+@export var icon : TextureRect
+@export var item: ItemData
+
+func _ready() -> void:
+	update_ui()
+
+func update_ui():
+	if not item:
+		icon.texture = null
+		return
+		
+	icon.texture = item.icon
+	tooltip_text = item.item_name
+
+func _get_drag_data(at_position: Vector2) -> Variant:
+	if not item:
+		return
+	
+	var preview = duplicate()
+	var c = Control.new()
+	c.add_child(preview)
+	preview.position -= Vector2(32,32)
+	preview.self_modulate = Color.TRANSPARENT
+	c.modulate = Color(c.modulate,0.5)
+	set_drag_preview(c)
+	icon.hide()
+	return self
+
+func _can_drop_data(at_position: Vector2, data: Variant) -> bool:
+	return true
+
+func _drop_data(at_position: Vector2, data: Variant) -> void:
+	var temp = item
+	item = data.item
+	data.item = temp
+	icon.show()
+	data.icon.show()
+	update_ui()
+	data.update_ui()