/// <summary>
/// Static method to show the menu
/// </summary>
/// <param name="sceneItem">Scene (not canvas) item that initiated the call</param>
/// <param name="callBack">A callback to call when choice happens</param>
public static void LaunchMenu(LinkableSceneItem sceneItem, Action<ChoiceItem> callBack)
{
// If our popupmenu instance is null
if (_popupMenu == null)
{
// We create a game object, name it a Popup Menu
var newGameObject = new GameObject { name = "Popup Menu" };
// And we add a Popup Menu component menu
_popupMenu = newGameObject.AddComponent<PopupTowerMenu>();
}
// We then launch a choice menu
_popupMenu.LaunchChoiceMenu(sceneItem.ChoicePack.ChoiceItems, sceneItem.TransformCache.position,
callBack, sceneItem);
}
public TowerOrPadWasPressedEvent(LinkableSceneItem sceneItem)
{
SceneItem = sceneItem;
}
/// <summary>
/// Launches the Choice menu
/// </summary>
/// <param name="choiceItems">Choice items to show</param>
/// <param name="position">Current WORLD position to display the menu</param>
/// <param name="callback">Callback to call when something gets picked</param>
/// <param name="sceneItem">Scene item that initiated the click</param>
public void LaunchChoiceMenu(ChoiceItem[] choiceItems, Vector3 position,
Action<ChoiceItem> callback, LinkableSceneItem sceneItem)
{
// Setting our instance delegate to current callback so we will be able to call it later
_currentCallbackAction = callback;
// Setting our gameObject cache to true
base.GameObjectCache.SetActive(true);
// We also enable our click blocker
// that transparent light panel
UiClickBlocker.Instance.Enable();
// And set it to the top "layer" so it covers everyting (except the actual menu that we will add later)
UiClickBlocker.Instance.TransformCache.SetAsLastSibling();
// We then recalculate our position and get actual screen point in pixels
position = Camera.main.WorldToScreenPoint(position);
// And set this menu to this point
TransformCache.position = position;
// Sometimes it's not obvious, but we also need to set this gameObject as a child of the Canvas
// So it will be rendered properly
TransformCache.SetParent(OverlayCanvas.Instance.TransformCache);
// And set it to the top "layer" so it covers everyting
TransformCache.SetAsLastSibling();
// Calculating positions of the choice items
// They should uniformly fill the 360 circle
int totalChoiceCount = choiceItems.Length;
// Actual angle step is calculated by dividing the 2 PI (360 degrees) by total count of items
float angleStep = 2f * Mathf.PI / totalChoiceCount;
// Scale to step items from the center
const float scale = 45f;
// Creating a local array of actual choice items
_currentItems = new ChoiceItem[totalChoiceCount];
// For every passed choice item
for (int i = 0; i < totalChoiceCount; i++)
{
var currentChoiceItem = choiceItems[i];
// If we're given a prefab (that's what .activeInHierarchy means)
if (!currentChoiceItem.gameObject.activeInHierarchy)
{
// We instantiate it first
// Destory and Instantiate things can be easily rewired to some object pool logic
currentChoiceItem = Instantiate(currentChoiceItem, position, Quaternion.identity) as ChoiceItem;
}
// We link this choice item to a passed scene item
currentChoiceItem.SceneItem = sceneItem;
// Set it as a child of the canvas (it's an UI.Image)
currentChoiceItem.transform.SetParent(OverlayCanvas.Instance.TransformCache);
// And set it to the top of everything else
currentChoiceItem.transform.SetAsLastSibling();
// We find the X and Y positions of the item
var rotationVector = new Vector3
{
x = Mathf.Sin(angleStep * i) * scale,
y = Mathf.Cos(angleStep * i) * scale
};
// Change the position of the element itself
currentChoiceItem.transform.position += rotationVector;
// And subscribe to it's Pressed event so we are able to catch the item that was chosen
currentChoiceItem.ChoiceItemPressedEvent += ChoiceItemWasPressedEventHandler;
// Finally, we store newly created item in our array
_currentItems[i] = currentChoiceItem;
}
// After all is done, we're just waiting for either any of the choices to fire a ChoiceItemPressedEvent event,
// or a click blocker to fire its BlockerWasClickedEvent event
}