// Use this for initialization
void Start()
{
// Add buttons to GUI
foreach (BuildingItem bi in buildingItems)
{
GameObject buttonInstance = GameObject.Instantiate(buildingButton, buildingItemContainer.transform);
// Clicky stuff
Button b = buttonInstance.GetComponentInChildren <Button>();
b.GetComponent <Image>().sprite = bi.image;
b.GetComponentInChildren <Text>().text = bi.name;
Text amount = buttonInstance.transform.FindChild("Amount").GetComponentInChildren <Text>();
amountTexts.Add(amount);
amount.text = bi.amount + "";
// Add onclick listener. The amount is changed in the building placer
b.onClick.AddListener(() => buildingPlacer.startPreview(bi.prefab.gameObject, amount));
// Tooltip
GameObject tooltip = Instantiate(tooltipPrefab, GameObject.FindGameObjectWithTag("Canvas").transform);
Text[] tooltipTexts = tooltip.GetComponentsInChildren <Text>();
tooltipTexts[0].text = bi.name;
tooltipTexts[1].text = bi.tooltipText;
tooltip.SetActive(false); // disabled by default
// Only show on hover
EventTrigger buttonTrigger = b.GetComponentInChildren <EventTrigger>();
EventTrigger.Entry enterEntry = new EventTrigger.Entry();
enterEntry.eventID = EventTriggerType.PointerEnter;
enterEntry.callback.AddListener((e) => tooltip.SetActive(true));
buttonTrigger.triggers.Add(enterEntry);
EventTrigger.Entry exitEntry = new EventTrigger.Entry();
exitEntry.eventID = EventTriggerType.PointerExit;
exitEntry.callback.AddListener((e) => tooltip.SetActive(false));
buttonTrigger.triggers.Add(exitEntry);
// Follow position of button
tooltip.GetComponent <Follow2D>().target = buttonInstance.GetComponent <RectTransform>();
}
}