Refactored inventory such that it can handle stacked items.

data/items/door.tres

@@ -1,12 +0,0 @@
-[gd_resource type="Resource" script_class="Item" load_steps=4 format=3 uid="uid://coser1y1y5unl"]
-
-[ext_resource type="Texture2D" uid="uid://ojsbkfjeu088" path="res://assets/3rdparty/kenney/survival-kit/Previews/toolPickaxe.png" id="1_ev4xm"]
-[ext_resource type="PackedScene" uid="uid://ca2l61b2j3y5b" path="res://assets/tools/Pickaxe.tscn" id="2_diiob"]
-[ext_resource type="Script" path="res://model/item.gd" id="3_n4quc"]
-
-[resource]
-resource_name = "Pickaxe"
-script = ExtResource("3_n4quc")
-name = "Pickaxe"
-scene = ExtResource("2_diiob")
-icon = ExtResource("1_ev4xm")

data/items/shovel.tres

@@ -10,3 +10,4 @@ script = ExtResource("1_0t4oi")
 name = "Shovel"
 scene = ExtResource("1_fne3r")
 icon = ExtResource("1_oaqa4")
+max_stack_size = 1

data/items/stick.tres

@@ -10,3 +10,4 @@ script = ExtResource("3_45lxd")
 name = "Stick"
 scene = ExtResource("2_mrxum")
 icon = ExtResource("1_c3g8n")
+max_stack_size = 64

data/items/stone.tres

@@ -9,3 +9,5 @@ script = ExtResource("1_dao2u")
 name = "Stone"
 scene = ExtResource("2_6nus0")
 icon = ExtResource("1_t2qva")
+stack_size = 1
+max_stack_size = 64

data/items/treelog.tres

@@ -9,3 +9,5 @@ script = ExtResource("1_tlj5a")
 name = "Tree Log"
 scene = ExtResource("2_ufvdy")
 icon = ExtResource("1_ak0y2")
+stack_size = 1
+max_stack_size = 64

data/items/woodplanks.tres

@@ -9,3 +9,4 @@ script = ExtResource("3_c8yxb")
 name = "Wood Planks"
 scene = ExtResource("2_4oehn")
 icon = ExtResource("1_plody")
+max_stack_size = 64

inventory.gd

@@ -1,16 +1,57 @@
 class_name Inventory
 
-var _content:Array[Item] = []
+var _content:Array[ItemStack] = []
+const INVENTORY_SIZE:int = 36
 
-func add_item(item:Item):
-	_content.append(item)
+func _init() -> void:
+	_content.resize(INVENTORY_SIZE)
 
+func get_free_item_stack_index() -> int:
+	for i:int in range(_content.size()):
+		if _content[i] == null:
+			return i
+	
+	return -1
+
+
+func add_item(item:Item) -> bool:
+	for item_stack:ItemStack in _content:
+		if item_stack == null:
+			continue
+		
+		if item_stack.item.resource_path != item.resource_path:
+			continue
+			
+		if item_stack.count < item_stack.item.max_stack_size:
+			item_stack.count = item_stack.count + 1
+			return true
+
+	var item_stack_index:int = get_free_item_stack_index()
+	if item_stack_index >= 0:
+		var item_stack:ItemStack = ItemStack.new()
+		item_stack.item = item
+		item_stack.count = 1
+		_content[item_stack_index] = item_stack
+		return true
+
+	return false
 
 func remove_item(item:Item):
-	_content.erase(item)
+	for i in range(_content.size() - 1, -1, -1):
+		var item_stack:ItemStack = _content[i]
+		if item_stack == null:
+			continue
+	
+		if item_stack.item.resource_path == item.resource_path:
+			if item_stack.count > 1:
+				item_stack.count = item_stack.count - 1
+			else:
+				_content[i] = null
+			
+			return
 
 
-func get_items() -> Array[Item]:
+func get_item_stacks() -> Array[ItemStack]:
 	return _content
 
 
@@ -21,7 +62,11 @@ func clear() -> void:
 func has_all(items:Array[Item]) -> bool:
 	var needed:Array[Item] = items.duplicate()
 	
-	for available in _content:
-		needed.erase(available)
+	for item_stack:ItemStack in _content:
+		if item_stack == null:
+			continue
+		
+		for i in range (item_stack.count):
+			needed.erase(item_stack.item)
 	
 	return needed.is_empty()

model/item.gd

@@ -4,3 +4,4 @@ extends Resource
 @export var name:String
 @export var scene:PackedScene
 @export var icon:Texture2D
+@export var max_stack_size:int = 1

scenes/main.gd

@@ -1,5 +1,5 @@
 class_name Main
-extends Node3D
+extends Node
 
 @onready var message_container:Control = %MessagesContainer
 @onready var message_textedit:TextEdit = %MessageTextEdit

scenes/main.tscn

@@ -1,20 +1,19 @@
-[gd_scene load_steps=14 format=3 uid="uid://ck104ww8vi7f1"]
+[gd_scene load_steps=13 format=3 uid="uid://ck104ww8vi7f1"]
 
 [ext_resource type="Script" path="res://scenes/main.gd" id="1_yidnr"]
 [ext_resource type="PackedScene" uid="uid://bo788o53t4rbq" path="res://scenes/startup_scene.tscn" id="2_imuae"]
 [ext_resource type="PackedScene" uid="uid://cqie4cy0uy1t0" path="res://scenes/game.tscn" id="2_o3qua"]
+[ext_resource type="PackedScene" uid="uid://nob4ibnp0p5u" path="res://ui/tool_container.tscn" id="11_yj24a"]
+[ext_resource type="Script" path="res://ui/tool_container.gd" id="12_duobv"]
 [ext_resource type="Script" path="res://root_ui.gd" id="13_h24kl"]
 [ext_resource type="Theme" uid="uid://dmk7hc81l8gbw" path="res://ui/ui_theme.tres" id="14_bvivl"]
 [ext_resource type="Script" path="res://game_ui.gd" id="15_g7bf1"]
 [ext_resource type="Script" path="res://ui/inventory_dialog.gd" id="16_18k4v"]
 [ext_resource type="PackedScene" uid="uid://dp3fi0g53qrt2" path="res://ui/item_slot.tscn" id="17_rucv3"]
-[ext_resource type="PackedScene" uid="uid://bwui4acukq4x6" path="res://ui/item_grid.tscn" id="18_fihac"]
+[ext_resource type="PackedScene" uid="uid://bwui4acukq4x6" path="res://ui/ItemGrid.tscn" id="18_fihac"]
 [ext_resource type="Script" path="res://ui/game_menu_ui.gd" id="19_krapk"]
-[ext_resource type="Texture2D" uid="uid://c7fu3paj3b4e8" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_silver.png" id="20_7s1r5"]
-[ext_resource type="Texture2D" uid="uid://drpl0ql1p3pfk" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_gold.png" id="21_663i3"]
-[ext_resource type="Texture2D" uid="uid://cq8ypeagpedq" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_bronze.png" id="22_le7qn"]
 
-[node name="Main" type="Node3D"]
+[node name="Main" type="Node"]
 script = ExtResource("1_yidnr")
 
 [node name="RootUI" type="CanvasLayer" parent="."]
@@ -183,7 +182,6 @@ text = "Start
 
 [node name="GameUI" type="Control" parent="RootUI"]
 unique_name_in_owner = true
-visible = false
 layout_mode = 3
 anchors_preset = 15
 anchor_right = 1.0
@@ -319,6 +317,8 @@ size_flags_vertical = 3
 [node name="IngredientsContainer" parent="RootUI/GameUI/InventoryDialog/Panel/PanelContainer/CraftingUI/HBoxContainer/CraftIngredients/Panel/CenterContainer" instance=ExtResource("18_fihac")]
 unique_name_in_owner = true
 layout_mode = 2
+columns = 3
+rows = 3
 
 [node name="HBoxContainer" type="HBoxContainer" parent="RootUI/GameUI/InventoryDialog/Panel/PanelContainer/CraftingUI/HBoxContainer/CraftIngredients"]
 layout_mode = 2
@@ -357,6 +357,7 @@ grow_vertical = 2
 [node name="ResultsContainer" parent="RootUI/GameUI/InventoryDialog/Panel/PanelContainer/CraftingUI/HBoxContainer/CraftResult/Panel/CenterContainer" instance=ExtResource("18_fihac")]
 unique_name_in_owner = true
 layout_mode = 2
+columns = 1
 
 [node name="HBoxContainer" type="HBoxContainer" parent="RootUI/GameUI/InventoryDialog/Panel/PanelContainer/CraftingUI/HBoxContainer/CraftResult"]
 layout_mode = 2
@@ -387,6 +388,7 @@ unique_name_in_owner = true
 layout_mode = 2
 size_flags_horizontal = 4
 size_flags_vertical = 4
+rows = 3
 
 [node name="GameMenuUI" type="PanelContainer" parent="RootUI/GameUI"]
 unique_name_in_owner = true
@@ -494,20 +496,10 @@ theme_override_constants/margin_bottom = 32
 [node name="PanelContainer" type="PanelContainer" parent="RootUI/GameUI/ToolSlots"]
 layout_mode = 2
 
-[node name="HBoxContainer" type="HBoxContainer" parent="RootUI/GameUI/ToolSlots/PanelContainer"]
+[node name="ToolContainer" parent="RootUI/GameUI/ToolSlots/PanelContainer" instance=ExtResource("11_yj24a")]
 layout_mode = 2
-
-[node name="Button2" type="Button" parent="RootUI/GameUI/ToolSlots/PanelContainer/HBoxContainer"]
-layout_mode = 2
-icon = ExtResource("20_7s1r5")
-
-[node name="Button3" type="Button" parent="RootUI/GameUI/ToolSlots/PanelContainer/HBoxContainer"]
-layout_mode = 2
-icon = ExtResource("21_663i3")
-
-[node name="Button" type="Button" parent="RootUI/GameUI/ToolSlots/PanelContainer/HBoxContainer"]
-layout_mode = 2
-icon = ExtResource("22_le7qn")
+script = ExtResource("12_duobv")
+slot_scene = ExtResource("17_rucv3")
 
 [node name="Scene" type="Node3D" parent="."]
 unique_name_in_owner = true

ui/ItemGrid.tscn

@@ -7,3 +7,6 @@
 columns = 9
 script = ExtResource("1_c5mg2")
 slot_scene = ExtResource("2_o52f5")
+
+[node name="ItemSlot" parent="." instance=ExtResource("2_o52f5")]
+layout_mode = 2

ui/game_ui.tscn

@@ -7,7 +7,7 @@
 [ext_resource type="Texture2D" uid="uid://cq8ypeagpedq" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_bronze.png" id="5_4e7rh"]
 [ext_resource type="Script" path="res://ui/inventory_dialog.gd" id="6_lssx5"]
 [ext_resource type="PackedScene" uid="uid://dp3fi0g53qrt2" path="res://ui/item_slot.tscn" id="7_2r38a"]
-[ext_resource type="PackedScene" uid="uid://bwui4acukq4x6" path="res://ui/item_grid.tscn" id="8_igemi"]
+[ext_resource type="PackedScene" uid="uid://bwui4acukq4x6" path="res://ui/ItemGrid.tscn" id="8_igemi"]
 
 [node name="GameUI" type="Control"]
 layout_mode = 3

ui/inventory_dialog.gd

@@ -26,7 +26,8 @@ func open(recipes:Array[Recipe], inventory:Inventory):
 		var index = recipe_list.add_item(recipe.name)
 		recipe_list.set_item_metadata(index, recipe)
 	
-	inventory_container.display(inventory.get_items())
+	inventory_container.displayStacks(inventory.get_item_stacks())
+	
 	recipe_list.select(0)
 	_on_recipe_list_item_selected(0)
 
@@ -65,5 +66,5 @@ func _on_craft_button_pressed():
 	for item in _selected_recipe.results:
 		_inventory.add_item(item)
 
-	inventory_container.display(_inventory.get_items())
+	inventory_container.displayStacks(_inventory.get_item_stacks())
 	update_crafting_widgets(_selected_recipe)

ui/item_grid.gd

@@ -2,12 +2,36 @@ class_name ItemGrid
 extends GridContainer
 
 @export var slot_scene:PackedScene
+@export var rows:int = 1
 
-func display(items:Array[Item]):
+func displayStacks(item_stacks:Array[ItemStack]):
 	for child in get_children():
 		child.queue_free()
-	
-	for item in items:
+		child.get_parent().remove_child(child)
+
+	for item_stack in item_stacks:
 		var slot:ItemSlot = slot_scene.instantiate()
 		add_child(slot)
-		slot.display(item)
+		
+		if item_stack != null:
+			slot.display(item_stack.item, item_stack.count)
+	
+	var item_count = rows * columns
+		
+	while get_child_count() < item_count:
+		add_child(slot_scene.instantiate())
+
+func display(item_stacks:Array[Item]):
+	for child in get_children():
+		child.queue_free()
+		child.get_parent().remove_child(child)
+
+	for item in item_stacks:
+		var slot:ItemSlot = slot_scene.instantiate()
+		add_child(slot)
+		slot.display(item, 1)
+	
+	var item_count = rows * columns
+		
+	while get_child_count() < item_count:
+		add_child(slot_scene.instantiate())

ui/item_slot.gd

@@ -2,6 +2,16 @@ class_name ItemSlot
 extends PanelContainer
 
 @onready var texture_rect:TextureRect = %TextureRect
+@onready var count_label = %CountLabel
 
-func display(item:Item):
-	texture_rect.texture = item.icon
+func display(item:Item, count:int):
+	if item != null:
+		texture_rect.texture = item.icon
+		update_quantity_text(count)
+
+func update_quantity_text(stack_size) -> void:
+	if stack_size <= 1:
+		count_label.hide()
+	else:
+		count_label.text = str(stack_size)
+		count_label.show()

ui/item_slot.tscn

@@ -1,14 +1,18 @@
-[gd_scene load_steps=3 format=3 uid="uid://dp3fi0g53qrt2"]
+[gd_scene load_steps=2 format=3 uid="uid://dp3fi0g53qrt2"]
 
 [ext_resource type="Script" path="res://ui/item_slot.gd" id="1_7v5l8"]
-[ext_resource type="Texture2D" uid="uid://ojsbkfjeu088" path="res://assets/3rdparty/kenney/survival-kit/Previews/toolPickaxe.png" id="1_mafu0"]
 
-[node name="PanelContainer" type="PanelContainer"]
+[node name="ItemSlot" type="PanelContainer"]
 custom_minimum_size = Vector2(64, 64)
 script = ExtResource("1_7v5l8")
 
 [node name="TextureRect" type="TextureRect" parent="."]
 unique_name_in_owner = true
 layout_mode = 2
-texture = ExtResource("1_mafu0")
 expand_mode = 3
+
+[node name="CountLabel" type="Label" parent="."]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 8
+size_flags_vertical = 8

ui/item_stack.gd

@@ -0,0 +1,9 @@
+class_name ItemStack
+extends Node
+
+var item:Item = null
+@export var count:int = 1
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.

ui/tool_container.gd

@@ -0,0 +1,13 @@
+class_name ToolContainer
+extends HBoxContainer
+
+@export var slot_scene:PackedScene
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass

ui/tool_container.tscn

@@ -0,0 +1,19 @@
+[gd_scene load_steps=4 format=3 uid="uid://nob4ibnp0p5u"]
+
+[ext_resource type="Texture2D" uid="uid://c7fu3paj3b4e8" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_silver.png" id="1_wpvbc"]
+[ext_resource type="Texture2D" uid="uid://drpl0ql1p3pfk" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_gold.png" id="2_le4fl"]
+[ext_resource type="Texture2D" uid="uid://cq8ypeagpedq" path="res://assets/3rdparty/kenney/ui-pack-rpg-expansion/PNG/cursorSword_bronze.png" id="3_jhcf7"]
+
+[node name="ToolContainer" type="HBoxContainer"]
+
+[node name="Button2" type="Button" parent="."]
+layout_mode = 2
+icon = ExtResource("1_wpvbc")
+
+[node name="Button3" type="Button" parent="."]
+layout_mode = 2
+icon = ExtResource("2_le4fl")
+
+[node name="Button" type="Button" parent="."]
+layout_mode = 2
+icon = ExtResource("3_jhcf7")

ui/ui_theme.tres

@@ -83,9 +83,9 @@ Button/styles/normal = SubResource("StyleBoxTexture_votra")
 Button/styles/pressed = SubResource("StyleBoxTexture_bpyb5")
 Control/styles/normal = SubResource("StyleBoxTexture_72pk6")
 ItemList/styles/normal = SubResource("StyleBoxTexture_kl7i7")
-Label/colors/font_color = Color(0.172833, 0.172833, 0.172833, 1)
+Label/colors/font_color = Color(1, 1, 1, 1)
 Label/colors/font_outline_color = Color(1, 1, 1, 1)
-Label/colors/font_shadow_color = Color(0, 0, 0, 0)
+Label/colors/font_shadow_color = Color(0.223103, 0.223103, 0.223103, 0.843137)
 Label/constants/line_spacing = 3
 Label/constants/outline_size = 0
 Label/constants/shadow_offset_x = 1