void ScrollView::scrollChildren(const Vec2& deltaMove)
{
Vec2 realMove = deltaMove;
if(_bounceEnabled)
{
// If the position of the inner container is out of the boundary, the offsets should be divided by two.
Vec2 outOfBoundary = getHowMuchOutOfBoundary();
realMove.x *= (outOfBoundary.x == 0 ? 1 : 0.5f);
realMove.y *= (outOfBoundary.y == 0 ? 1 : 0.5f);
}
if(!_bounceEnabled)
{
Vec2 outOfBoundary = getHowMuchOutOfBoundary(realMove);
realMove += outOfBoundary;
}
bool scrolledToLeft = false;
bool scrolledToRight = false;
bool scrolledToTop = false;
bool scrolledToBottom = false;
if (realMove.y > 0.0f) // up
{
float icBottomPos = _innerContainer->getBottomBoundary();
if (icBottomPos + realMove.y >= _bottomBoundary)
{
scrolledToBottom = true;
}
}
else if (realMove.y < 0.0f) // down
{
float icTopPos = _innerContainer->getTopBoundary();
if (icTopPos + realMove.y <= _topBoundary)
{
scrolledToTop = true;
}
}
if (realMove.x < 0.0f) // left
{
float icRightPos = _innerContainer->getRightBoundary();
if (icRightPos + realMove.x <= _rightBoundary)
{
scrolledToRight = true;
}
}
else if (realMove.x > 0.0f) // right
{
float icLeftPos = _innerContainer->getLeftBoundary();
if (icLeftPos + realMove.x >= _leftBoundary)
{
scrolledToLeft = true;
}
}
moveInnerContainer(realMove, false);
if(realMove.x != 0 || realMove.y != 0)
{
processScrollingEvent();
}
if(scrolledToBottom)
{
processScrollEvent(MoveDirection::BOTTOM, false);
}
if(scrolledToTop)
{
processScrollEvent(MoveDirection::TOP, false);
}
if(scrolledToLeft)
{
processScrollEvent(MoveDirection::LEFT, false);
}
if(scrolledToRight)
{
processScrollEvent(MoveDirection::RIGHT, false);
}
}
bool ScrollView::scrollChildren(float touchOffsetX, float touchOffsetY)
{
touchOffsetX = (_direction == Direction::VERTICAL ? 0 : touchOffsetX);
touchOffsetY = (_direction == Direction::HORIZONTAL ? 0 : touchOffsetY);
if(_bounceEnabled)
{
// If the position of the inner container is out of the boundary, the offsets should be divided by two.
touchOffsetX *= (isOutOfBoundaryLeftOrRight() ? 0.5f : 1);
touchOffsetY *= (isOutOfBoundaryTopOrBottom() ? 0.5f : 1);
}
float realOffsetX = touchOffsetX;
float realOffsetY = touchOffsetY;
bool scrolledToLeft = false;
bool scrolledToRight = false;
bool scrolledToTop = false;
bool scrolledToBottom = false;
if (touchOffsetY > 0.0f) // up
{
float icBottomPos = _innerContainer->getBottomBoundary();
if (icBottomPos + touchOffsetY >= _bottomBoundary)
{
if(!_bounceEnabled)
{
realOffsetY = _bottomBoundary - icBottomPos;
}
scrolledToBottom = true;
}
}
else if (touchOffsetY < 0.0f) // down
{
float icTopPos = _innerContainer->getTopBoundary();
if (icTopPos + touchOffsetY <= _topBoundary)
{
if(!_bounceEnabled)
{
realOffsetY = _topBoundary - icTopPos;
}
scrolledToTop = true;
}
}
if (touchOffsetX < 0.0f) // left
{
float icRightPos = _innerContainer->getRightBoundary();
if (icRightPos + touchOffsetX <= _rightBoundary)
{
if(!_bounceEnabled)
{
realOffsetX = _rightBoundary - icRightPos;
}
scrolledToRight = true;
}
}
else if (touchOffsetX > 0.0f) // right
{
float icLeftPos = _innerContainer->getLeftBoundary();
if (icLeftPos + touchOffsetX >= _leftBoundary)
{
if(!_bounceEnabled)
{
realOffsetX = _leftBoundary - icLeftPos;
}
scrolledToLeft = true;
}
}
moveChildren(realOffsetX, realOffsetY);
if(realOffsetX != 0 || realOffsetY != 0)
{
processScrollingEvent();
}
if(scrolledToBottom)
{
processScrollEvent(MoveDirection::BOTTOM, false);
}
if(scrolledToTop)
{
processScrollEvent(MoveDirection::TOP, false);
}
if(scrolledToLeft)
{
processScrollEvent(MoveDirection::LEFT, false);
}
if(scrolledToRight)
{
processScrollEvent(MoveDirection::RIGHT, false);
}
bool scrollEnabledUpDown = (!scrolledToBottom && !scrolledToTop);
bool scrollEnabledLeftRight = (!scrolledToLeft && !scrolledToRight);
return scrollEnabledUpDown || scrollEnabledLeftRight;
}
