void OnEnable()
{
for (int i = 0; i < contentView.transform.childCount; i++)
{
Destroy(contentView.transform.GetChild(i).gameObject);
}
researchHandler.RefreshResearchTree();
foreach (ResearchItem researchItem in researchHandler.AvailableResearch())
{
GameObject button = Instantiate(researchButton);
button.transform.SetParent(contentView.transform);
button.GetComponentInChildren <Text>().text = researchItem.title;
button.GetComponent <ResearchButton>().researchItem = researchItem;
}
}
