Godot 3.2.4

Then the last article ( [GDScript] Designing Item Properties ) began to do

We started to add drag and drop functions to the items, and started adding the following code to the script of the Goods node

var drag_source # Used to record the last dragged node (exchange data to this node after the item is dropped)

#--------------------------------------------
# Node with methods
#--------------------------------------------
func get_drag_data(position: Vector2):
	var drag_node = self.duplicate() # Duplicate the current node for drag and drop display
	drag_node.use_top_left = true # Make the picture centered and look natural
	drag_node.drag_source = self
	set_drag_preview(drag_node) # Set the node dragged by the mouse
	return drag_node


func can_drop_data(position: Vector2, data) -> bool:
	# Determine if it can be placed on this node
	return data && data.get("goods_property") # Only the goods_property property can be put down


func drop_data(position: Vector2, data) -> void:
	# Receive dropped node data
	swap_goods(self, data.drag_source)



#--------------------------------------------
# custom method
#--------------------------------------------
## Swap two items
## (In fact, the attributes of the two items are made into resources, and the rest of the nodes are the same
## In this way, we only need to exchange the resource attribute to replace the item)
func swap_goods(a, b):
	var p_temp = a.goods_property
	a.goods_property = b.goods_property
	b.goods_property = p_temp

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I forgot, it was checked in the last tutorial, this time for the Goods nodeuse_top_leftUncheck it

and then clear itgoods_propertyAttribute content, click the small circle arrow on the left to

check the TextureRect nodeExpandAttributes

Let's create a new scene for the inventory, and add the following nodes

to the GridContainer nodecolumnsproperty is set to5

Select the GridContainer node, click the link icon above the scene
and searchGoodsNode, and add:

start to design two more items, double-click to select the last oneWeapon_02.tresPerform the following operations in the file

properties panel to learnAtlasTextureUse of resources Click TextureRegion


at the bottom of the editor to complete the following:

You can now follow the steps aboveWeapon_03.tresThe properties of the file, I did this. After that

, we drag and drop the finished item resource files one by one to the goods_property attribute of the Goods node in our scene.

Next to witness the moment of miracle, press F6 to run the game:

(End)