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OnInventoryHover Messes with Combine Interactions
From the title, it seems that when I try to combine two inventory items, it causes a null pointer issue.
The last debugging statement logged in the code below, when I combine two inventory items, is "invInstance is AC.InvInstance" and then it crashes.
Is there a way to prevent this behavior? I'm attaching my code below, any guidance / help is appreciated!
using UnityEngine;
using AC;
using UnityEngine.TextCore.Text;
using System.Collections.Generic;
public class InventoryAutoExamine : MonoBehaviour
{
// the description of the hotspot to manually set
// when an inventory item is selected.
private string description;
private void OnEnable() { EventManager.OnInventoryHover += OnInventoryHover; }
private void OnDisable() { EventManager.OnInventoryHover -= OnInventoryHover; }
private void OnInventoryHover(InvCollection invCollection, InvInstance invInstance)
{
// auto-run examine interaction if no inventory item selected
if (KickStarter.runtimeInventory.SelectedItem != null && invInstance != null)
{
Debug.Log("GCG IT BECAME NULL");
// combine interactions with inventory
description = "Combine " +
KickStarter.runtimeInventory.SelectedItem.label +
" with " +
invInstance.ItemLabel;
//TODO: HANDLE THE CASE WHERE THE PLAYER COMBINES THE ITEM WITH ITSELF.
if(invInstance.ItemLabel == KickStarter.runtimeInventory.SelectedItem.label)
{
Debug.Log("LABELS MATCH");
}
// set description to combine interaction
GlobalVariables.GetVariable("HotspotDescription").SetStringValue(description);
} else if (KickStarter.runtimeInventory.SelectedItem == null && invInstance != null)
{
Debug.Log("invInstance is " + invInstance);
if(invInstance == null)
{
Debug.Log("IT BECAME NULL WHEN DESELECTINFG");
return;
}
GlobalVariables.GetVariable("HotspotDescription").SetStringValue(invInstance.GetProperty(0).TextValue);
}
}
public void deselectInventory()
{
KickStarter.runtimeInventory.SetNull();
}
}
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Comments
I should clarify -- this only happens when combining two inventory items( A and B ) produces a third item (C).
This interaction should remove A and B and give the player C.
Is the Property with ID = 0 available for all Items?
One thing to note about the InvInstance class: it can be non-null but still invalid, if the amount it represents is zero.
Rather than a null-check, use its IsValid static function instead, i.e.:
Ah yes it's the first property for all the times.
I think that was it actually -- the way I was doing the check -- thank you for the heads up on that front!