CCPoint CCScrollView::getNodeFullyVisibleOffset(CCNode* node) {
// get node bound in container
CCRect nodeBound = CCRectMake(0, 0, node->getContentSize().width, node->getContentSize().height);
CCAffineTransform t = node->nodeToAncestorTransform(getContainer());
nodeBound = CCRectApplyAffineTransform(nodeBound, t);
// get offset
float scale = getZoomScale();
CCPoint offset = ccp(-nodeBound.origin.x / scale, -nodeBound.origin.y / scale);
// clamp offset
const CCPoint minOffset = minContainerOffset();
const CCPoint maxOffset = maxContainerOffset();
offset.x = MAX(minOffset.x, MIN(maxOffset.x, offset.x));
offset.y = MAX(minOffset.y, MIN(maxOffset.y, offset.y));
// return
return offset;
}
void ScrollView::onTouchMoved(Touch* touch, Event* event)
{
if (!this->isVisible())
{
return;
}
if (std::find(_touches.begin(), _touches.end(), touch) != _touches.end())
{
if (_touches.size() == 1 && _dragging)
{ // scrolling
Vec2 moveDistance, newPoint;
Rect frame;
float newX, newY;
frame = getViewRect();
newPoint = this->convertTouchToNodeSpace(_touches[0]);
moveDistance = newPoint - _touchPoint;
float dis = 0.0f;
if (_direction == Direction::VERTICAL)
{
dis = moveDistance.y;
float pos = _container->getPosition().y;
if (!(minContainerOffset().y <= pos && pos <= maxContainerOffset().y)) {
moveDistance.y *= BOUNCE_BACK_FACTOR;
}
}
else if (_direction == Direction::HORIZONTAL)
{
dis = moveDistance.x;
float pos = _container->getPosition().x;
if (!(minContainerOffset().x <= pos && pos <= maxContainerOffset().x)) {
moveDistance.x *= BOUNCE_BACK_FACTOR;
}
}
else
{
dis = sqrtf(moveDistance.x*moveDistance.x + moveDistance.y*moveDistance.y);
float pos = _container->getPosition().y;
if (!(minContainerOffset().y <= pos && pos <= maxContainerOffset().y)) {
moveDistance.y *= BOUNCE_BACK_FACTOR;
}
pos = _container->getPosition().x;
if (!(minContainerOffset().x <= pos && pos <= maxContainerOffset().x)) {
moveDistance.x *= BOUNCE_BACK_FACTOR;
}
}
if (!_touchMoved && fabs(convertDistanceFromPointToInch(dis)) < MOVE_INCH )
{
//CCLOG("Invalid movement, distance = [%f, %f], disInch = %f", moveDistance.x, moveDistance.y);
return;
}
if (!_touchMoved)
{
moveDistance = Vec2::ZERO;
}
_touchPoint = newPoint;
_touchMoved = true;
if (_dragging)
{
switch (_direction)
{
case Direction::VERTICAL:
moveDistance = Vec2(0.0f, moveDistance.y);
break;
case Direction::HORIZONTAL:
moveDistance = Vec2(moveDistance.x, 0.0f);
break;
default:
break;
}
newX = _container->getPosition().x + moveDistance.x;
newY = _container->getPosition().y + moveDistance.y;
_scrollDistance = moveDistance;
this->setContentOffset(Vec2(newX, newY));
}
}
else if (_touches.size() == 2 && !_dragging)
{
const float len = _container->convertTouchToNodeSpace(_touches[0]).getDistance(
_container->convertTouchToNodeSpace(_touches[1]));
this->setZoomScale(this->getZoomScale()*len/_touchLength);
}
}
}