void ProcessFingerPress(HitTestEvent hitInfo, bool isNewTouch, int cacheIndex,
out Entity down, out Entity clicked)
{
down = Entity.Null;
clicked = Entity.Null;
if (isNewTouch)
{
// account for touch events that are within a single frame
if (hitInfo.Touch.phase == TouchState.Ended)
{
clicked = hitInfo.e;
}
else
{
// ok to mutate array, since we are adding to the end.
cachedTouches.Add(new TouchInfo
{
touch = hitInfo.Touch,
e = hitInfo.e,
eligibleForClickOrPressState = true,
inputDown = true
});
down = hitInfo.e;
}
}
else
{
var cachedTouchInfo = cachedTouches[cacheIndex];
if (cachedTouchInfo.eligibleForClickOrPressState)
{
// validate that finger hasn't left box
// if it has, current touch is no longer eligible for triggering clicked / pressed state
if (hitInfo.e != cachedTouchInfo.e)
{
cachedTouchInfo.eligibleForClickOrPressState = false;
cachedTouches[cacheIndex] = cachedTouchInfo;
return;
}
// haven't left original box, continue pressed state or trigger a click
if (hitInfo.Touch.phase == TouchState.Ended)
{
clicked = hitInfo.e;
}
else
{
down = hitInfo.e;
}
}
}
}
void ProcessFirstMouse(HitTestEvent hitInfo, out Entity down)
{
cachedTouches.Add(new TouchInfo
{
touch = hitInfo.Touch,
e = hitInfo.e,
eligibleForClickOrPressState = true,
inputDown = (hitInfo.InputDown > 0)
});
down = hitInfo.Down ? hitInfo.e : Entity.Null;
}
void ProcessMouseInput(HitTestEvent hitInfo, int cacheIndex,
out Entity down, out Entity clicked, out Entity hover)
{
down = Entity.Null;
clicked = Entity.Null;
hover = Entity.Null;
if (hitInfo.Up)
{
hover = hitInfo.e;
}
if (cacheIndex < 0)
{
ProcessFirstMouse(hitInfo, out down);
return;
}
var cachedInfo = cachedTouches[cacheIndex];
if (cachedInfo.eligibleForClickOrPressState)
{
if (hitInfo.Up)
{
if (hitInfo.e == cachedInfo.e && cachedInfo.inputDown)
{
clicked = hitInfo.e;
}
}
else if (hitInfo.Down)
{
if (hitInfo.e != cachedInfo.e && cachedInfo.inputDown)
{
cachedInfo.eligibleForClickOrPressState = false;
cachedTouches[cacheIndex] = cachedInfo;
return;
}
cachedInfo.e = hitInfo.e;
down = hitInfo.e;
}
}
if (hitInfo.Up)
{
cachedInfo.eligibleForClickOrPressState = true;
}
cachedInfo.inputDown = (hitInfo.InputDown > 0);
cachedTouches[cacheIndex] = cachedInfo;
}
/**
* Checks to see the if the entity has been pressed and the finger or mouse that clicked it is still
* down. For example, if a user presses a button then drags their finger out of the button transform,
* this will remain true for the button entity until the finger or mouse is released.
*/
internal bool IsPressOnSelectedEntityActive(Entity e, out HitTestEvent outEvent)
{
foreach (var cachedEvent in cachedTouches)
{
if (e == cachedEvent.e && HitsContainsFingerId(cachedEvent.touch.fingerId, out var index))
{
outEvent = hitTestEvents[index];
return(true);
}
}
outEvent = default;
return(false);
}