private static int AddCallback(ComponentSystem sys, Entity uiControl, TypeManager.FieldInfo field, bool watchNegative, EventCallback callback)
{
if (!sys.World.EntityManager.Exists(uiControl))
{
return(-1);
}
var watchers = sys.World.GetExistingSystem <UIControlsWatchersSystem>();
return(watchers.WatchChanged(uiControl, field, (Entity e, bool oldValue, bool value, Watcher source) =>
{
if (value ^ watchNegative)
{
callback?.Invoke(e);
}
return true;
}));
}
/// <summary>
/// Watches an entity for changes to a bool component.
/// </summary>
/// <seealso cref="WatchChanged(Unity.Entities.Entity,Unity.Entities.TypeManager.FieldInfo,Unity.Tiny.Watchers.WatchersSystem.WatchValueDelegateFloat)"/>
public int WatchChanged(Entity e, TypeManager.FieldInfo fieldInfo, WatchValueDelegateBool callback)
{
Watcher w = new Watcher {
watchedEntity = e, field = fieldInfo, id = nextId++, system = this
};
if (fieldInfo.primitiveType != PrimitiveFieldTypes.Bool)
{
throw new ArgumentException("A bool field must be watched by a bool delegate.");
}
var v = new WatcherValueEntryBool {
fn = callback, target = w, value = false
};
if (!GetValueBool(e, fieldInfo, ref v.value))
{
throw new ArgumentException("Could not get initial value to watch. Entity or component is missing.");
}
watchers.Add(v);
return(w.id);
}
internal bool GetValueFloat(Entity e, TypeManager.FieldInfo field, ref float value)
{
if (!EntityManager.Exists(e))
{
return(false);
}
if (!EntityManager.HasComponentRaw(e, field.componentTypeIndex))
{
return(false);
}
float temp;
unsafe {
byte *ptrDest = (byte *)&temp;
byte *ptrSrc = EntityManager.GetComponentDataWithTypeRO(e, field.componentTypeIndex) + field.byteOffsetInComponent;
for (int i = 0; i < sizeof(float); i++)
{
ptrDest[i] = ptrSrc[i];
}
}
value = temp;
return(true);
}
