cocos2dx学习之UIScrollView.cpp
/****************************************************************************
Copyright (c) 2013-2017 Chukong Technologies Inc.
http://www.cocos2d-x.org
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#include "ui/UIScrollView.h"
#include "base/CCDirector.h"
#include "base/ccUtils.h"
#include "platform/CCDevice.h"
#include "ui/UIScrollViewBar.h"
#include "2d/CCTweenFunction.h"
#include "2d/CCCamera.h"
NS_CC_BEGIN
static const int NUMBER_OF_GATHERED_TOUCHES_FOR_MOVE_SPEED = 5;
static const float OUT_OF_BOUNDARY_BREAKING_FACTOR = 0.05f;
static const float BOUNCE_BACK_DURATION = 1.0f;
#define MOVE_INCH 7.0f/160.0f
static float convertDistanceFromPointToInch(const Vec2& dis)
{
auto glview = Director::getInstance()->getOpenGLView();
int dpi = Device::getDPI();
float distance = Vec2(dis.x * glview->getScaleX() / dpi, dis.y * glview->getScaleY() / dpi).getLength();
return distance;
}
namespace ui {
IMPLEMENT_CLASS_GUI_INFO(ScrollView)
ScrollView::ScrollView():
_innerContainer(nullptr),
_direction(Direction::VERTICAL),
_topBoundary(0.0f),
_bottomBoundary(0.0f),
_leftBoundary(0.0f),
_rightBoundary(0.0f),
_bePressed(false),
_childFocusCancelOffsetInInch(MOVE_INCH),
_touchMovePreviousTimestamp(0),
_touchTotalTimeThreshold(0.5f),
_scrolling(false),
_autoScrolling(false),
_autoScrollAttenuate(true),
_autoScrollTotalTime(0),
_autoScrollAccumulatedTime(0),
_autoScrollCurrentlyOutOfBoundary(false),
_autoScrollBraking(false),
_inertiaScrollEnabled(true),
_bounceEnabled(false),
_outOfBoundaryAmount(Vec2::ZERO),
_outOfBoundaryAmountDirty(true),
_scrollBarEnabled(true),
_verticalScrollBar(nullptr),
_horizontalScrollBar(nullptr),
_scrollViewEventListener(nullptr),
_scrollViewEventSelector(nullptr),
_eventCallback(nullptr)
{
setTouchEnabled(true);
_propagateTouchEvents = false;
}
ScrollView::~ScrollView()
{
_verticalScrollBar = nullptr;
_horizontalScrollBar = nullptr;
_scrollViewEventListener = nullptr;
_scrollViewEventSelector = nullptr;
}
ScrollView* ScrollView::create()
{
ScrollView* widget = new (std::nothrow) ScrollView();
if (widget && widget->init())
{
widget->autorelease();
return widget;
}
CC_SAFE_DELETE(widget);
return nullptr;
}
void ScrollView::onEnter()
{
#if CC_ENABLE_SCRIPT_BINDING
if (_scriptType == kScriptTypeJavascript)
{
if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnEnter))
return;
}
#endif
Layout::onEnter();
scheduleUpdate();
}
bool ScrollView::init()
{
if (Layout::init())
{
setClippingEnabled(true);
_innerContainer->setTouchEnabled(false);
if(_scrollBarEnabled)
{
initScrollBar();
}
return true;
}
return false;
}
void ScrollView::initRenderer()
{
Layout::initRenderer();
_innerContainer = Layout::create();
_innerContainer->setColor(Color3B(255,255,255));
_innerContainer->setOpacity(255);
_innerContainer->setCascadeColorEnabled(true);
_innerContainer->setCascadeOpacityEnabled(true);
addProtectedChild(_innerContainer, 1, 1);
}
void ScrollView::onSizeChanged()
{
Layout::onSizeChanged();
_topBoundary = _contentSize.height;
_rightBoundary = _contentSize.width;
Size innerSize = _innerContainer->getContentSize();
float orginInnerSizeWidth = innerSize.width;
float orginInnerSizeHeight = innerSize.height;
float innerSizeWidth = MAX(orginInnerSizeWidth, _contentSize.width);
float innerSizeHeight = MAX(orginInnerSizeHeight, _contentSize.height);
_innerContainer->setContentSize(Size(innerSizeWidth, innerSizeHeight));
setInnerContainerPosition(Vec2(0, _contentSize.height - _innerContainer->getContentSize().height));
if (_verticalScrollBar != nullptr)
{
_verticalScrollBar->onScrolled(getHowMuchOutOfBoundary());
}
if (_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->onScrolled(getHowMuchOutOfBoundary());
}
}
void ScrollView::setInnerContainerSize(const Size &size)
{
float innerSizeWidth = _contentSize.width;
float innerSizeHeight = _contentSize.height;
Size originalInnerSize = _innerContainer->getContentSize();
if (size.width < _contentSize.width)
{
CCLOG("Inner width <= scrollview width, it will be force sized!");
}
else
{
innerSizeWidth = size.width;
}
if (size.height < _contentSize.height)
{
CCLOG("Inner height <= scrollview height, it will be force sized!");
}
else
{
innerSizeHeight = size.height;
}
_innerContainer->setContentSize(Size(innerSizeWidth, innerSizeHeight));
// Calculate and set the position of the inner container.
Vec2 pos = _innerContainer->getPosition();
if (_innerContainer->getLeftBoundary() != 0.0f)
{
pos.x = _innerContainer->getAnchorPoint().x * _innerContainer->getContentSize().width;
}
if (_innerContainer->getTopBoundary() != _contentSize.height)
{
pos.y = _contentSize.height - (1.0f - _innerContainer->getAnchorPoint().y) * _innerContainer->getContentSize().height;
}
setInnerContainerPosition(pos);
updateScrollBar(Vec2::ZERO);
}
const Size& ScrollView::getInnerContainerSize() const
{
return _innerContainer->getContentSize();
}
void ScrollView::setInnerContainerPosition(const Vec2 &position)
{
if(position == _innerContainer->getPosition())
{
return;
}
_innerContainer->setPosition(position);
_outOfBoundaryAmountDirty = true;
// Process bouncing events
if(_bounceEnabled)
{
for(int direction = (int) MoveDirection::TOP; direction < (int) MoveDirection::RIGHT; ++direction)
{
if(isOutOfBoundary((MoveDirection) direction))
{
processScrollEvent((MoveDirection) direction, true);
}
}
}
this->retain();
if (_eventCallback)
{
_eventCallback(this, EventType::CONTAINER_MOVED);
}
if (_ccEventCallback)
{
_ccEventCallback(this, static_cast
}
this->release();
}
const Vec2& ScrollView::getInnerContainerPosition() const
{
return _innerContainer->getPosition();
}
void ScrollView::addChild(Node* child)
{
ScrollView::addChild(child, child->getLocalZOrder(), child->getTag());
}
void ScrollView::addChild(Node * child, int localZOrder)
{
ScrollView::addChild(child, localZOrder, child->getTag());
}
void ScrollView::addChild(Node *child, int zOrder, int tag)
{
child->setGlobalZOrder(_globalZOrder);
_innerContainer->addChild(child, zOrder, tag);
}
void ScrollView::addChild(Node* child, int zOrder, const std::string &name)
{
child->setGlobalZOrder(_globalZOrder);
_innerContainer->addChild(child, zOrder, name);
}
void ScrollView::removeAllChildren()
{
removeAllChildrenWithCleanup(true);
}
void ScrollView::removeAllChildrenWithCleanup(bool cleanup)
{
_innerContainer->removeAllChildrenWithCleanup(cleanup);
}
void ScrollView::removeChild(Node* child, bool cleanup)
{
return _innerContainer->removeChild(child, cleanup);
}
Vector
{
return _innerContainer->getChildren();
}
const Vector
{
return _innerContainer->getChildren();
}
ssize_t ScrollView::getChildrenCount() const
{
return _innerContainer->getChildrenCount();
}
Node* ScrollView::getChildByTag(int tag) const
{
return _innerContainer->getChildByTag(tag);
}
Node* ScrollView::getChildByName(const std::string& name)const
{
return _innerContainer->getChildByName(name);
}
void ScrollView::moveInnerContainer(const Vec2& deltaMove, bool canStartBounceBack)
{
Vec2 adjustedMove = flattenVectorByDirection(deltaMove);
setInnerContainerPosition(getInnerContainerPosition() + adjustedMove);
Vec2 outOfBoundary = getHowMuchOutOfBoundary();
updateScrollBar(outOfBoundary);
if(_bounceEnabled && canStartBounceBack)
{
startBounceBackIfNeeded();
}
}
void ScrollView::updateScrollBar(const Vec2& outOfBoundary)
{
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->onScrolled(outOfBoundary);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->onScrolled(outOfBoundary);
}
}
Vec2 ScrollView::calculateTouchMoveVelocity() const
{
float totalTime = 0;
for(auto &timeDelta : _touchMoveTimeDeltas)
{
totalTime += timeDelta;
}
if(totalTime == 0 || totalTime >= _touchTotalTimeThreshold)
{
return Vec2::ZERO;
}
Vec2 totalMovement;
for(auto &displacement : _touchMoveDisplacements)
{
totalMovement += displacement;
}
return totalMovement / totalTime;
}
void ScrollView::startInertiaScroll(const Vec2& touchMoveVelocity)
{
const float MOVEMENT_FACTOR = 0.7f;
Vec2 inertiaTotalMovement = touchMoveVelocity * MOVEMENT_FACTOR;
startAttenuatingAutoScroll(inertiaTotalMovement, touchMoveVelocity);
}
bool ScrollView::startBounceBackIfNeeded()
{
if (!_bounceEnabled)
{
return false;
}
Vec2 bounceBackAmount = getHowMuchOutOfBoundary();
if(fltEqualZero(bounceBackAmount))
{
return false;
}
startAutoScroll(bounceBackAmount, BOUNCE_BACK_DURATION, true);
return true;
}
Vec2 ScrollView::flattenVectorByDirection(const Vec2& vector)
{
Vec2 result = vector;
result.x = (_direction == Direction::VERTICAL ? 0 : result.x);
result.y = (_direction == Direction::HORIZONTAL ? 0 : result.y);
return result;
}
Vec2 ScrollView::getHowMuchOutOfBoundary(const Vec2& addition)
{
if(addition == Vec2::ZERO && !_outOfBoundaryAmountDirty)
{
return _outOfBoundaryAmount;
}
Vec2 outOfBoundaryAmount(Vec2::ZERO);
if(_innerContainer->getLeftBoundary() + addition.x > _leftBoundary)
{
outOfBoundaryAmount.x = _leftBoundary - (_innerContainer->getLeftBoundary() + addition.x);
}
else if(_innerContainer->getRightBoundary() + addition.x < _rightBoundary)
{
outOfBoundaryAmount.x = _rightBoundary - (_innerContainer->getRightBoundary() + addition.x);
}
if(_innerContainer->getTopBoundary() + addition.y < _topBoundary)
{
outOfBoundaryAmount.y = _topBoundary - (_innerContainer->getTopBoundary() + addition.y);
}
else if(_innerContainer->getBottomBoundary() + addition.y > _bottomBoundary)
{
outOfBoundaryAmount.y = _bottomBoundary - (_innerContainer->getBottomBoundary() + addition.y);
}
if(addition == Vec2::ZERO)
{
_outOfBoundaryAmount = outOfBoundaryAmount;
_outOfBoundaryAmountDirty = false;
}
return outOfBoundaryAmount;
}
bool ScrollView::isOutOfBoundary(MoveDirection dir)
{
Vec2 outOfBoundary = getHowMuchOutOfBoundary();
switch(dir)
{
case MoveDirection::TOP: return outOfBoundary.y > 0;
case MoveDirection::BOTTOM: return outOfBoundary.y < 0;
case MoveDirection::LEFT: return outOfBoundary.x < 0;
case MoveDirection::RIGHT: return outOfBoundary.x > 0;
}
return false;
}
bool ScrollView::isOutOfBoundary()
{
return !fltEqualZero(getHowMuchOutOfBoundary());
}
void ScrollView::startAutoScrollToDestination(const Vec2& destination, float timeInSec, bool attenuated)
{
startAutoScroll(destination - _innerContainer->getPosition(), timeInSec, attenuated);
}
static float calculateAutoScrollTimeByInitialSpeed(float initialSpeed)
{
// Calculate the time from the initial speed according to quintic polynomial.
float time = sqrtf(sqrtf(initialSpeed / 5));
return time;
}
void ScrollView::startAttenuatingAutoScroll(const Vec2& deltaMove, const Vec2& initialVelocity)
{
float time = calculateAutoScrollTimeByInitialSpeed(initialVelocity.length());
startAutoScroll(deltaMove, time, true);
}
void ScrollView::startAutoScroll(const Vec2& deltaMove, float timeInSec, bool attenuated)
{
Vec2 adjustedDeltaMove = flattenVectorByDirection(deltaMove);
_autoScrolling = true;
_autoScrollTargetDelta = adjustedDeltaMove;
_autoScrollAttenuate = attenuated;
_autoScrollStartPosition = _innerContainer->getPosition();
_autoScrollTotalTime = timeInSec;
_autoScrollAccumulatedTime = 0;
_autoScrollBraking = false;
_autoScrollBrakingStartPosition = Vec2::ZERO;
// If the destination is also out of boundary of same side, start brake from beginning.
Vec2 currentOutOfBoundary = getHowMuchOutOfBoundary();
if (!fltEqualZero(currentOutOfBoundary))
{
_autoScrollCurrentlyOutOfBoundary = true;
Vec2 afterOutOfBoundary = getHowMuchOutOfBoundary(adjustedDeltaMove);
if(currentOutOfBoundary.x * afterOutOfBoundary.x > 0 || currentOutOfBoundary.y * afterOutOfBoundary.y > 0)
{
_autoScrollBraking = true;
}
}
}
void ScrollView::stopAutoScroll()
{
_autoScrolling = false;
_autoScrollAttenuate = true;
_autoScrollTotalTime = 0;
_autoScrollAccumulatedTime = 0;
}
bool ScrollView::isNecessaryAutoScrollBrake()
{
if(_autoScrollBraking)
{
return true;
}
if(isOutOfBoundary())
{
// It just went out of boundary.
if(!_autoScrollCurrentlyOutOfBoundary)
{
_autoScrollCurrentlyOutOfBoundary = true;
_autoScrollBraking = true;
_autoScrollBrakingStartPosition = getInnerContainerPosition();
return true;
}
}
else
{
_autoScrollCurrentlyOutOfBoundary = false;
}
return false;
}
float ScrollView::getAutoScrollStopEpsilon() const
{
return FLT_EPSILON;
}
bool ScrollView::fltEqualZero(const Vec2& point) const
{
return (fabsf(point.x) <= 0.0001f && fabsf(point.y) <= 0.0001f);
}
void ScrollView::processAutoScrolling(float deltaTime)
{
// Make auto scroll shorter if it needs to deaccelerate.
float brakingFactor = (isNecessaryAutoScrollBrake() ? OUT_OF_BOUNDARY_BREAKING_FACTOR : 1);
// Elapsed time
_autoScrollAccumulatedTime += deltaTime * (1 / brakingFactor);
// Calculate the progress percentage
float percentage = MIN(1, _autoScrollAccumulatedTime / _autoScrollTotalTime);
if(_autoScrollAttenuate)
{
// Use quintic(5th degree) polynomial
percentage = tweenfunc::quintEaseOut(percentage);
}
// Calculate the new position
Vec2 newPosition = _autoScrollStartPosition + (_autoScrollTargetDelta * percentage);
bool reachedEnd = std::abs(percentage - 1) <= this->getAutoScrollStopEpsilon();
if (reachedEnd)
{
newPosition = _autoScrollStartPosition + _autoScrollTargetDelta;
}
if(_bounceEnabled)
{
// The new position is adjusted if out of boundary
newPosition = _autoScrollBrakingStartPosition + (newPosition - _autoScrollBrakingStartPosition) * brakingFactor;
}
else
{
// Don't let go out of boundary
Vec2 moveDelta = newPosition - getInnerContainerPosition();
Vec2 outOfBoundary = getHowMuchOutOfBoundary(moveDelta);
if (!fltEqualZero(outOfBoundary))
{
newPosition += outOfBoundary;
reachedEnd = true;
}
}
// Finish auto scroll if it ended
if(reachedEnd)
{
_autoScrolling = false;
dispatchEvent(SCROLLVIEW_EVENT_AUTOSCROLL_ENDED, EventType::AUTOSCROLL_ENDED);
}
moveInnerContainer(newPosition - getInnerContainerPosition(), reachedEnd);
}
void ScrollView::jumpToDestination(const Vec2 &des)
{
_autoScrolling = false;
moveInnerContainer(des - getInnerContainerPosition(), true);
}
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);
}
}
void ScrollView::scrollToBottom(float timeInSec, bool attenuated)
{
startAutoScrollToDestination(Vec2(_innerContainer->getPosition().x, 0.0f), timeInSec, attenuated);
}
void ScrollView::scrollToTop(float timeInSec, bool attenuated)
{
startAutoScrollToDestination(Vec2(_innerContainer->getPosition().x,
_contentSize.height - _innerContainer->getContentSize().height), timeInSec, attenuated);
}
void ScrollView::scrollToLeft(float timeInSec, bool attenuated)
{
startAutoScrollToDestination(Vec2(0.0f, _innerContainer->getPosition().y), timeInSec, attenuated);
}
void ScrollView::scrollToRight(float timeInSec, bool attenuated)
{
startAutoScrollToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width,
_innerContainer->getPosition().y), timeInSec, attenuated);
}
void ScrollView::scrollToTopLeft(float timeInSec, bool attenuated)
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
startAutoScrollToDestination(Vec2(0.0f, _contentSize.height - _innerContainer->getContentSize().height), timeInSec, attenuated);
}
void ScrollView::scrollToTopRight(float timeInSec, bool attenuated)
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
startAutoScrollToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width,
_contentSize.height - _innerContainer->getContentSize().height), timeInSec, attenuated);
}
void ScrollView::scrollToBottomLeft(float timeInSec, bool attenuated)
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
startAutoScrollToDestination(Vec2::ZERO, timeInSec, attenuated);
}
void ScrollView::scrollToBottomRight(float timeInSec, bool attenuated)
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
startAutoScrollToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width, 0.0f), timeInSec, attenuated);
}
void ScrollView::scrollToPercentVertical(float percent, float timeInSec, bool attenuated)
{
float minY = _contentSize.height - _innerContainer->getContentSize().height;
float h = - minY;
startAutoScrollToDestination(Vec2(_innerContainer->getPosition().x, minY + percent * h / 100.0f), timeInSec, attenuated);
}
void ScrollView::scrollToPercentHorizontal(float percent, float timeInSec, bool attenuated)
{
float w = _innerContainer->getContentSize().width - _contentSize.width;
startAutoScrollToDestination(Vec2(-(percent * w / 100.0f), _innerContainer->getPosition().y), timeInSec, attenuated);
}
void ScrollView::scrollToPercentBothDirection(const Vec2& percent, float timeInSec, bool attenuated)
{
if (_direction != Direction::BOTH)
{
return;
}
float minY = _contentSize.height - _innerContainer->getContentSize().height;
float h = - minY;
float w = _innerContainer->getContentSize().width - _contentSize.width;
startAutoScrollToDestination(Vec2(-(percent.x * w / 100.0f), minY + percent.y * h / 100.0f), timeInSec, attenuated);
}
float ScrollView::getScrolledPercentVertical() const {
const float minY = getContentSize().height - getInnerContainerSize().height;
return (1.f - getInnerContainerPosition().y / minY)*100.f;
}
float ScrollView::getScrolledPercentHorizontal() const {
const float minX = getContentSize().width - getInnerContainerSize().width;
return getInnerContainerPosition().x / minX * 100.f;
}
Vec2 ScrollView::getScrolledPercentBothDirection() const {
return {getScrolledPercentHorizontal(), getScrolledPercentVertical()};
}
void ScrollView::jumpToBottom()
{
jumpToDestination(Vec2(_innerContainer->getPosition().x, 0.0f));
}
void ScrollView::jumpToTop()
{
jumpToDestination(Vec2(_innerContainer->getPosition().x,
_contentSize.height - _innerContainer->getContentSize().height));
}
void ScrollView::jumpToLeft()
{
jumpToDestination(Vec2(0.0f, _innerContainer->getPosition().y));
}
void ScrollView::jumpToRight()
{
jumpToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width, _innerContainer->getPosition().y));
}
void ScrollView::jumpToTopLeft()
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
jumpToDestination(Vec2(0.0f, _contentSize.height - _innerContainer->getContentSize().height));
}
void ScrollView::jumpToTopRight()
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
jumpToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width,
_contentSize.height - _innerContainer->getContentSize().height));
}
void ScrollView::jumpToBottomLeft()
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
jumpToDestination(Vec2::ZERO);
}
void ScrollView::jumpToBottomRight()
{
if (_direction != Direction::BOTH)
{
CCLOG("Scroll direction is not both!");
return;
}
jumpToDestination(Vec2(_contentSize.width - _innerContainer->getContentSize().width, 0.0f));
}
void ScrollView::jumpToPercentVertical(float percent)
{
float minY = _contentSize.height - _innerContainer->getContentSize().height;
float h = - minY;
jumpToDestination(Vec2(_innerContainer->getPosition().x, minY + percent * h / 100.0f));
}
void ScrollView::jumpToPercentHorizontal(float percent)
{
float w = _innerContainer->getContentSize().width - _contentSize.width;
jumpToDestination(Vec2(-(percent * w / 100.0f), _innerContainer->getPosition().y));
}
void ScrollView::jumpToPercentBothDirection(const Vec2& percent)
{
if (_direction != Direction::BOTH)
{
return;
}
float minY = _contentSize.height - _innerContainer->getContentSize().height;
float h = - minY;
float w = _innerContainer->getContentSize().width - _contentSize.width;
jumpToDestination(Vec2(-(percent.x * w / 100.0f), minY + percent.y * h / 100.0f));
}
bool ScrollView::calculateCurrAndPrevTouchPoints(Touch* touch, Vec3* currPt, Vec3* prevPt)
{
if (nullptr == _hittedByCamera ||
false == hitTest(touch->getLocation(), _hittedByCamera, currPt) ||
false == hitTest(touch->getPreviousLocation(), _hittedByCamera, prevPt))
{
return false;
}
return true;
}
void ScrollView::gatherTouchMove(const Vec2& delta)
{
while(_touchMoveDisplacements.size() >= NUMBER_OF_GATHERED_TOUCHES_FOR_MOVE_SPEED)
{
_touchMoveDisplacements.pop_front();
_touchMoveTimeDeltas.pop_front();
}
_touchMoveDisplacements.push_back(delta);
long long timestamp = utils::getTimeInMilliseconds();
_touchMoveTimeDeltas.push_back((timestamp - _touchMovePreviousTimestamp) / 1000.0f);
_touchMovePreviousTimestamp = timestamp;
}
void ScrollView::handlePressLogic(Touch* /*touch*/)
{
_bePressed = true;
_autoScrolling = false;
// Clear gathered touch move information
{
_touchMovePreviousTimestamp = utils::getTimeInMilliseconds();
_touchMoveDisplacements.clear();
_touchMoveTimeDeltas.clear();
}
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->onTouchBegan();
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->onTouchBegan();
}
}
void ScrollView::handleMoveLogic(Touch *touch)
{
Vec3 currPt, prevPt;
if(!calculateCurrAndPrevTouchPoints(touch, &currPt, &prevPt))
{
return;
}
Vec3 delta3 = currPt - prevPt;
Vec2 delta(delta3.x, delta3.y);
scrollChildren(delta);
// Gather touch move information for speed calculation
gatherTouchMove(delta);
}
void ScrollView::handleReleaseLogic(Touch *touch)
{
// Gather the last touch information when released
{
Vec3 currPt, prevPt;
if(calculateCurrAndPrevTouchPoints(touch, &currPt, &prevPt))
{
Vec3 delta3 = currPt - prevPt;
Vec2 delta(delta3.x, delta3.y);
gatherTouchMove(delta);
}
}
_bePressed = false;
bool bounceBackStarted = startBounceBackIfNeeded();
if(!bounceBackStarted && _inertiaScrollEnabled)
{
Vec2 touchMoveVelocity = calculateTouchMoveVelocity();
if(touchMoveVelocity != Vec2::ZERO)
{
startInertiaScroll(touchMoveVelocity);
}
}
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->onTouchEnded();
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->onTouchEnded();
}
if ( _scrolling ) {
processScrollingEndedEvent();
}
}
bool ScrollView::onTouchBegan(Touch *touch, Event *unusedEvent)
{
bool pass = Layout::onTouchBegan(touch, unusedEvent);
if (!_isInterceptTouch)
{
if (_hitted)
{
handlePressLogic(touch);
}
}
return pass;
}
void ScrollView::onTouchMoved(Touch *touch, Event *unusedEvent)
{
Layout::onTouchMoved(touch, unusedEvent);
if (!_isInterceptTouch)
{
handleMoveLogic(touch);
}
}
void ScrollView::onTouchEnded(Touch *touch, Event *unusedEvent)
{
Layout::onTouchEnded(touch, unusedEvent);
if (!_isInterceptTouch)
{
handleReleaseLogic(touch);
}
_isInterceptTouch = false;
}
void ScrollView::onTouchCancelled(Touch *touch, Event *unusedEvent)
{
Layout::onTouchCancelled(touch, unusedEvent);
if (!_isInterceptTouch)
{
handleReleaseLogic(touch);
}
_isInterceptTouch = false;
}
void ScrollView::update(float dt)
{
if (_autoScrolling)
{
processAutoScrolling(dt);
}
}
void ScrollView::interceptTouchEvent(Widget::TouchEventType event, Widget *sender,Touch* touch)
{
if(!_touchEnabled)
{
Layout::interceptTouchEvent(event, sender, touch);
return;
}
if(_direction == Direction::NONE)
return;
Vec2 touchPoint = touch->getLocation();
switch (event)
{
case TouchEventType::BEGAN:
{
_isInterceptTouch = true;
_touchBeganPosition = touch->getLocation();
handlePressLogic(touch);
}
break;
case TouchEventType::MOVED:
{
_touchMovePosition = touch->getLocation();
// calculates move offset in points
float offsetInInch = 0;
switch (_direction)
{
case Direction::HORIZONTAL:
offsetInInch = convertDistanceFromPointToInch(Vec2(std::abs(sender->getTouchBeganPosition().x - touchPoint.x), 0));
break;
case Direction::VERTICAL:
offsetInInch = convertDistanceFromPointToInch(Vec2(0, std::abs(sender->getTouchBeganPosition().y - touchPoint.y)));
break;
case Direction::BOTH:
offsetInInch = convertDistanceFromPointToInch(sender->getTouchBeganPosition() - touchPoint);
break;
default:
break;
}
if (offsetInInch > _childFocusCancelOffsetInInch)
{
sender->setHighlighted(false);
handleMoveLogic(touch);
}
}
break;
case TouchEventType::CANCELED:
case TouchEventType::ENDED:
{
_touchEndPosition = touch->getLocation();
handleReleaseLogic(touch);
if (sender->isSwallowTouches())
{
_isInterceptTouch = false;
}
}
break;
}
}
void ScrollView::processScrollEvent(MoveDirection dir, bool bounce)
{
ScrollviewEventType scrollEventType;
EventType eventType;
switch(dir) {
case MoveDirection::TOP:
{
scrollEventType = (bounce ? SCROLLVIEW_EVENT_BOUNCE_TOP : SCROLLVIEW_EVENT_SCROLL_TO_TOP);
eventType = (bounce ? EventType::BOUNCE_TOP : EventType::SCROLL_TO_TOP);
break;
}
case MoveDirection::BOTTOM:
{
scrollEventType = (bounce ? SCROLLVIEW_EVENT_BOUNCE_BOTTOM : SCROLLVIEW_EVENT_SCROLL_TO_BOTTOM);
eventType = (bounce ? EventType::BOUNCE_BOTTOM : EventType::SCROLL_TO_BOTTOM);
break;
}
case MoveDirection::LEFT:
{
scrollEventType = (bounce ? SCROLLVIEW_EVENT_BOUNCE_LEFT : SCROLLVIEW_EVENT_SCROLL_TO_LEFT);
eventType = (bounce ? EventType::BOUNCE_LEFT : EventType::SCROLL_TO_LEFT);
break;
}
case MoveDirection::RIGHT:
{
scrollEventType = (bounce ? SCROLLVIEW_EVENT_BOUNCE_RIGHT : SCROLLVIEW_EVENT_SCROLL_TO_RIGHT);
eventType = (bounce ? EventType::BOUNCE_RIGHT : EventType::SCROLL_TO_RIGHT);
break;
}
}
dispatchEvent(scrollEventType, eventType);
}
void ScrollView::processScrollingEvent()
{
if ( !_scrolling ) {
_scrolling = true;
dispatchEvent(SCROLLVIEW_EVENT_SCROLLING_BEGAN, EventType::SCROLLING_BEGAN);
}
dispatchEvent(SCROLLVIEW_EVENT_SCROLLING, EventType::SCROLLING);
}
void ScrollView::processScrollingEndedEvent() {
_scrolling = false;
dispatchEvent(SCROLLVIEW_EVENT_SCROLLING_ENDED, EventType::SCROLLING_ENDED);
}
void ScrollView::dispatchEvent(ScrollviewEventType scrollEventType, EventType eventType)
{
this->retain();
if (_scrollViewEventListener && _scrollViewEventSelector)
{
(_scrollViewEventListener->*_scrollViewEventSelector)(this, scrollEventType);
}
if (_eventCallback)
{
_eventCallback(this, eventType);
}
if (_ccEventCallback)
{
_ccEventCallback(this, static_cast
}
this->release();
}
void ScrollView::addEventListenerScrollView(Ref *target, SEL_ScrollViewEvent selector)
{
_scrollViewEventListener = target;
_scrollViewEventSelector = selector;
}
void ScrollView::addEventListener(const ccScrollViewCallback& callback)
{
_eventCallback = callback;
}
void ScrollView::setDirection(Direction dir)
{
_direction = dir;
if(_scrollBarEnabled)
{
removeScrollBar();
initScrollBar();
}
}
ScrollView::Direction ScrollView::getDirection()const
{
return _direction;
}
void ScrollView::setBounceEnabled(bool enabled)
{
_bounceEnabled = enabled;
}
bool ScrollView::isBounceEnabled() const
{
return _bounceEnabled;
}
void ScrollView::setInertiaScrollEnabled(bool enabled)
{
_inertiaScrollEnabled = enabled;
}
bool ScrollView::isInertiaScrollEnabled() const
{
return _inertiaScrollEnabled;
}
void ScrollView::setScrollBarEnabled(bool enabled)
{
if(_scrollBarEnabled == enabled)
{
return;
}
if(_scrollBarEnabled)
{
removeScrollBar();
}
_scrollBarEnabled = enabled;
if(_scrollBarEnabled)
{
initScrollBar();
}
}
bool ScrollView::isScrollBarEnabled() const
{
return _scrollBarEnabled;
}
void ScrollView::setScrollBarPositionFromCorner(const Vec2& positionFromCorner)
{
if(_direction != Direction::HORIZONTAL)
{
setScrollBarPositionFromCornerForVertical(positionFromCorner);
}
if(_direction != Direction::VERTICAL)
{
setScrollBarPositionFromCornerForHorizontal(positionFromCorner);
}
}
void ScrollView::setScrollBarPositionFromCornerForVertical(const Vec2& positionFromCorner)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
CCASSERT(_direction != Direction::HORIZONTAL, "Scroll view doesn't have a vertical scroll bar!");
_verticalScrollBar->setPositionFromCorner(positionFromCorner);
}
Vec2 ScrollView::getScrollBarPositionFromCornerForVertical() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
CCASSERT(_direction != Direction::HORIZONTAL, "Scroll view doesn't have a vertical scroll bar!");
return _verticalScrollBar->getPositionFromCorner();
}
void ScrollView::setScrollBarPositionFromCornerForHorizontal(const Vec2& positionFromCorner)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
CCASSERT(_direction != Direction::VERTICAL, "Scroll view doesn't have a horizontal scroll bar!");
_horizontalScrollBar->setPositionFromCorner(positionFromCorner);
}
Vec2 ScrollView::getScrollBarPositionFromCornerForHorizontal() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
CCASSERT(_direction != Direction::VERTICAL, "Scroll view doesn't have a horizontal scroll bar!");
return _horizontalScrollBar->getPositionFromCorner();
}
void ScrollView::setScrollBarWidth(float width)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->setWidth(width);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->setWidth(width);
}
}
float ScrollView::getScrollBarWidth() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
return _verticalScrollBar->getWidth();
}
else if(_horizontalScrollBar != nullptr)
{
return _horizontalScrollBar->getWidth();
}
return 0;
}
void ScrollView::setScrollBarColor(const Color3B& color)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->setColor(color);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->setColor(color);
}
}
const Color3B& ScrollView::getScrollBarColor() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
return _verticalScrollBar->getColor();
}
else if(_horizontalScrollBar != nullptr)
{
return _horizontalScrollBar->getColor();
}
return Color3B::WHITE;
}
void ScrollView::setScrollBarOpacity(GLubyte opacity)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->setOpacity(opacity);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->setOpacity(opacity);
}
}
GLubyte ScrollView::getScrollBarOpacity() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
return _verticalScrollBar->getOpacity();
}
else if(_horizontalScrollBar != nullptr)
{
return _horizontalScrollBar->getOpacity();
}
return -1;
}
void ScrollView::setScrollBarAutoHideEnabled(bool autoHideEnabled)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->setAutoHideEnabled(autoHideEnabled);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->setAutoHideEnabled(autoHideEnabled);
}
}
bool ScrollView::isScrollBarAutoHideEnabled() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
return _verticalScrollBar->isAutoHideEnabled();
}
else if(_horizontalScrollBar != nullptr)
{
return _horizontalScrollBar->isAutoHideEnabled();
}
return false;
}
void ScrollView::setScrollBarAutoHideTime(float autoHideTime)
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
_verticalScrollBar->setAutoHideTime(autoHideTime);
}
if(_horizontalScrollBar != nullptr)
{
_horizontalScrollBar->setAutoHideTime(autoHideTime);
}
}
float ScrollView::getScrollBarAutoHideTime() const
{
CCASSERT(_scrollBarEnabled, "Scroll bar should be enabled!");
if(_verticalScrollBar != nullptr)
{
return _verticalScrollBar->getAutoHideTime();
}
else if(_horizontalScrollBar != nullptr)
{
return _horizontalScrollBar->getAutoHideTime();
}
return 0;
}
void ScrollView::setTouchTotalTimeThreshold(float touchTotalTimeThreshold)
{
_touchTotalTimeThreshold = touchTotalTimeThreshold;
}
float ScrollView::getTouchTotalTimeThreshold() const
{
return _touchTotalTimeThreshold;
}
Layout* ScrollView::getInnerContainer()const
{
return _innerContainer;
}
void ScrollView::setLayoutType(Type type)
{
_innerContainer->setLayoutType(type);
}
Layout::Type ScrollView::getLayoutType() const
{
return _innerContainer->getLayoutType();
}
void ScrollView::doLayout()
{
if (!_doLayoutDirty)
{
return;
}
_doLayoutDirty = false;
}
std::string ScrollView::getDescription() const
{
return "ScrollView";
}
Widget* ScrollView::createCloneInstance()
{
return ScrollView::create();
}
void ScrollView::copyClonedWidgetChildren(Widget* model)
{
Layout::copyClonedWidgetChildren(model);
}
void ScrollView::copySpecialProperties(Widget *widget)
{
ScrollView* scrollView = dynamic_cast
if (scrollView)
{
Layout::copySpecialProperties(widget);
setDirection(scrollView->_direction);
setInnerContainerPosition(scrollView->getInnerContainerPosition());
setInnerContainerSize(scrollView->getInnerContainerSize());
_topBoundary = scrollView->_topBoundary;
_bottomBoundary = scrollView->_bottomBoundary;
_leftBoundary = scrollView->_leftBoundary;
_rightBoundary = scrollView->_rightBoundary;
_bePressed = scrollView->_bePressed;
_childFocusCancelOffsetInInch = scrollView->_childFocusCancelOffsetInInch;
_touchMoveDisplacements = scrollView->_touchMoveDisplacements;
_touchMoveTimeDeltas = scrollView->_touchMoveTimeDeltas;
_touchMovePreviousTimestamp = scrollView->_touchMovePreviousTimestamp;
_scrolling = scrollView->_scrolling;
_autoScrolling = scrollView->_autoScrolling;
_autoScrollAttenuate = scrollView->_autoScrollAttenuate;
_autoScrollStartPosition = scrollView->_autoScrollStartPosition;
_autoScrollTargetDelta = scrollView->_autoScrollTargetDelta;
_autoScrollTotalTime = scrollView->_autoScrollTotalTime;
_autoScrollAccumulatedTime = scrollView->_autoScrollAccumulatedTime;
_autoScrollCurrentlyOutOfBoundary = scrollView->_autoScrollCurrentlyOutOfBoundary;
_autoScrollBraking = scrollView->_autoScrollBraking;
_autoScrollBrakingStartPosition = scrollView->_autoScrollBrakingStartPosition;
setInertiaScrollEnabled(scrollView->_inertiaScrollEnabled);
setBounceEnabled(scrollView->_bounceEnabled);
_scrollViewEventListener = scrollView->_scrollViewEventListener;
_scrollViewEventSelector = scrollView->_scrollViewEventSelector;
_eventCallback = scrollView->_eventCallback;
_ccEventCallback = scrollView->_ccEventCallback;
setScrollBarEnabled(scrollView->isScrollBarEnabled());
if(isScrollBarEnabled())
{
if(_direction != Direction::HORIZONTAL)
{
setScrollBarPositionFromCornerForVertical(scrollView->getScrollBarPositionFromCornerForVertical());
}
if(_direction != Direction::VERTICAL)
{
setScrollBarPositionFromCornerForHorizontal(scrollView->getScrollBarPositionFromCornerForHorizontal());
}
setScrollBarWidth(scrollView->getScrollBarWidth());
setScrollBarColor(scrollView->getScrollBarColor());
setScrollBarAutoHideEnabled(scrollView->isScrollBarAutoHideEnabled());
setScrollBarAutoHideTime(scrollView->getScrollBarAutoHideTime());
}
}
}
void ScrollView::initScrollBar()
{
if(_direction != Direction::HORIZONTAL && _verticalScrollBar == nullptr)
{
_verticalScrollBar = ScrollViewBar::create(this, Direction::VERTICAL);
addProtectedChild(_verticalScrollBar, 2);
}
if(_direction != Direction::VERTICAL && _horizontalScrollBar == nullptr)
{
_horizontalScrollBar = ScrollViewBar::create(this, Direction::HORIZONTAL);
addProtectedChild(_horizontalScrollBar, 2);
}
}
void ScrollView::removeScrollBar()
{
if(_verticalScrollBar != nullptr)
{
removeProtectedChild(_verticalScrollBar);
_verticalScrollBar = nullptr;
}
if(_horizontalScrollBar != nullptr)
{
removeProtectedChild(_horizontalScrollBar);
_horizontalScrollBar = nullptr;
}
}
Widget* ScrollView::findNextFocusedWidget(cocos2d::ui::Widget::FocusDirection direction, cocos2d::ui::Widget *current)
{
if (this->getLayoutType() == Layout::Type::VERTICAL
|| this->getLayoutType() == Layout::Type::HORIZONTAL)
{
return _innerContainer->findNextFocusedWidget(direction, current);
}
else
{
return Widget::findNextFocusedWidget(direction, current);
}
}
}
NS_CC_END