/// <summary>
/// A function to implement the spinner behaviour.
/// </summary>
/// <param name="mgr">The application manager.</param>
/// <param name="actor">The actor that owns the parameter the widget is being setup for.</param>
/// <param name="btn">The spinner button.</param>
/// <param name="ev">The parameter value.</param>
/// <param name="ve">The parameter's widget.</param>
public static void SetupWidgetDrag(Main mgr, SceneActor actor, UnityEngine.UI.Button btn, EditValue ev, ValueEditor_Base ve)
{
UnityEngine.EventSystems.EventTrigger et =
btn.gameObject.AddComponent <UnityEngine.EventSystems.EventTrigger>();
et.triggers = new List <UnityEngine.EventSystems.EventTrigger.Entry>();
UnityEngine.EventSystems.EventTrigger.Entry aBeginDrag = new UnityEngine.EventSystems.EventTrigger.Entry();
aBeginDrag.eventID = UnityEngine.EventSystems.EventTriggerType.BeginDrag;
aBeginDrag.callback.AddListener(
(x) =>
{
UnityEngine.EventSystems.PointerEventData ped = x as UnityEngine.EventSystems.PointerEventData;
if (ve.escapeCheck != null)
{
ve.StopCoroutine(ve.escapeCheck);
}
ve.escapeCheck = ve.StartCoroutine(EndDragOnEscape(ped, mgr, actor, ve));
startingDragValue = ev.val.Clone();
startDrag = ped.position;
});
UnityEngine.EventSystems.EventTrigger.Entry aEndDrag = new UnityEngine.EventSystems.EventTrigger.Entry();
aEndDrag.eventID = UnityEngine.EventSystems.EventTriggerType.EndDrag;
aEndDrag.callback.AddListener(
(x) =>
{
UnityEngine.EventSystems.PointerEventData ped = x as UnityEngine.EventSystems.PointerEventData;
ValFloat diff = new ValFloat(-(startDrag.y - ped.position.y));
Val vb = ev.Offset(startingDragValue, diff);
ev.val.SetValue(vb);
mgr.NotifyActorModified(actor, ev.name);
if (ve != null && ve.escapeCheck != null)
{
ve.StopCoroutine(ve.escapeCheck);
ve.escapeCheck = null;
}
});
UnityEngine.EventSystems.EventTrigger.Entry aDrag = new UnityEngine.EventSystems.EventTrigger.Entry();
aDrag.eventID = UnityEngine.EventSystems.EventTriggerType.Drag;
aDrag.callback.AddListener(
(x) =>
{
UnityEngine.EventSystems.PointerEventData ped = x as UnityEngine.EventSystems.PointerEventData;
ValFloat diff = new ValFloat(-(startDrag.y - ped.position.y));
Val vb = ev.Offset(startingDragValue, diff);
ev.val.SetValue(vb);
mgr.NotifyActorModified(actor, ev.name);
});
et.triggers.Add(aBeginDrag);
et.triggers.Add(aEndDrag);
et.triggers.Add(aDrag);
}