/**************************************************************************** Copyright (c) 2012 cocos2d-x.org Copyright (c) 2010 Sangwoo Im http://www.cocos2d-x.org Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ****************************************************************************/ #include "CCScrollView.h" NS_CC_EXT_BEGIN #define SCROLL_DEACCEL_RATE 0.95f #define SCROLL_DEACCEL_DIST 1.0f #define BOUNCE_DURATION 0.15f #define INSET_RATIO 0.2f #define MOVE_INCH 7.0f/160.0f static float convertDistanceFromPointToInch(float pointDis) { float factor = ( CCEGLView::sharedOpenGLView()->getScaleX() + CCEGLView::sharedOpenGLView()->getScaleY() ) / 2; return pointDis * factor / CCDevice::getDPI(); } CCScrollView::CCScrollView() : m_fZoomScale(0.0f) , m_fMinZoomScale(0.0f) , m_fMaxZoomScale(0.0f) , m_pDelegate(NULL) , m_eDirection(kCCScrollViewDirectionBoth) , m_bDragging(false) , m_pContainer(NULL) , m_bTouchMoved(false) , m_bBounceable(false) , m_bClippingToBounds(false) , m_fTouchLength(0.0f) , m_pTouches(NULL) , m_fMinScale(0.0f) , m_fMaxScale(0.0f) { } CCScrollView::~CCScrollView() { m_pTouches->release(); } CCScrollView* CCScrollView::create(CCSize size, CCNode* container/* = NULL*/) { CCScrollView* pRet = new CCScrollView(); if (pRet && pRet->initWithViewSize(size, container)) { pRet->autorelease(); } else { CC_SAFE_DELETE(pRet); } return pRet; } CCScrollView* CCScrollView::create() { CCScrollView* pRet = new CCScrollView(); if (pRet && pRet->init()) { pRet->autorelease(); } else { CC_SAFE_DELETE(pRet); } return pRet; } bool CCScrollView::initWithViewSize(CCSize size, CCNode *container/* = NULL*/) { if (CCLayer::init()) { m_pContainer = container; if (!this->m_pContainer) { m_pContainer = CCLayer::create(); this->m_pContainer->ignoreAnchorPointForPosition(false); this->m_pContainer->setAnchorPoint(ccp(0.0f, 0.0f)); } this->setViewSize(size); setTouchEnabled(true); m_pTouches = new CCArray(); m_pDelegate = NULL; m_bBounceable = true; m_bClippingToBounds = true; //m_pContainer->setContentSize(CCSizeZero); m_eDirection = kCCScrollViewDirectionBoth; m_pContainer->setPosition(ccp(0.0f, 0.0f)); m_fTouchLength = 0.0f; this->addChild(m_pContainer); m_fMinScale = m_fMaxScale = 1.0f; return true; } return false; } bool CCScrollView::init() { return this->initWithViewSize(CCSizeMake(200, 200), NULL); } void CCScrollView::registerWithTouchDispatcher() { CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, false); } bool CCScrollView::isNodeVisible(CCNode* node) { const CCPoint offset = this->getContentOffset(); const CCSize size = this->getViewSize(); const float scale = this->getZoomScale(); CCRect viewRect; viewRect = CCRectMake(-offset.x/scale, -offset.y/scale, size.width/scale, size.height/scale); return viewRect.intersectsRect(node->boundingBox()); } void CCScrollView::pause(CCObject* sender) { m_pContainer->pauseSchedulerAndActions(); CCObject* pObj = NULL; CCArray* pChildren = m_pContainer->getChildren(); CCARRAY_FOREACH(pChildren, pObj) { CCNode* pChild = (CCNode*)pObj; pChild->pauseSchedulerAndActions(); } } void CCScrollView::resume(CCObject* sender) { CCObject* pObj = NULL; CCArray* pChildren = m_pContainer->getChildren(); CCARRAY_FOREACH(pChildren, pObj) { CCNode* pChild = (CCNode*)pObj; pChild->resumeSchedulerAndActions(); } m_pContainer->resumeSchedulerAndActions(); } void CCScrollView::setTouchEnabled(bool e) { CCLayer::setTouchEnabled(e); if (!e) { m_bDragging = false; m_bTouchMoved = false; m_pTouches->removeAllObjects(); } } void CCScrollView::setContentOffset(CCPoint offset, bool animated/* = false*/) { if (animated) { //animate scrolling this->setContentOffsetInDuration(offset, BOUNCE_DURATION); } else { //set the container position directly if (!m_bBounceable) { const CCPoint minOffset = this->minContainerOffset(); const CCPoint maxOffset = this->maxContainerOffset(); offset.x = MAX(minOffset.x, MIN(maxOffset.x, offset.x)); offset.y = MAX(minOffset.y, MIN(maxOffset.y, offset.y)); } m_pContainer->setPosition(offset); if (m_pDelegate != NULL) { m_pDelegate->scrollViewDidScroll(this); } } } void CCScrollView::setContentOffsetInDuration(CCPoint offset, float dt) { CCFiniteTimeAction *scroll, *expire; scroll = CCMoveTo::create(dt, offset); expire = CCCallFuncN::create(this, callfuncN_selector(CCScrollView::stoppedAnimatedScroll)); m_pContainer->runAction(CCSequence::create(scroll, expire, NULL)); this->schedule(schedule_selector(CCScrollView::performedAnimatedScroll)); } CCPoint CCScrollView::getContentOffset() { return m_pContainer->getPosition(); } void CCScrollView::setZoomScale(float s) { if (m_pContainer->getScale() != s) { CCPoint oldCenter, newCenter; CCPoint center; if (m_fTouchLength == 0.0f) { center = ccp(m_tViewSize.width*0.5f, m_tViewSize.height*0.5f); center = this->convertToWorldSpace(center); } else { center = m_tTouchPoint; } oldCenter = m_pContainer->convertToNodeSpace(center); m_pContainer->setScale(MAX(m_fMinScale, MIN(m_fMaxScale, s))); newCenter = m_pContainer->convertToWorldSpace(oldCenter); const CCPoint offset = ccpSub(center, newCenter); if (m_pDelegate != NULL) { m_pDelegate->scrollViewDidZoom(this); } this->setContentOffset(ccpAdd(m_pContainer->getPosition(),offset)); } } float CCScrollView::getZoomScale() { return m_pContainer->getScale(); } void CCScrollView::setZoomScale(float s, bool animated) { if (animated) { this->setZoomScaleInDuration(s, BOUNCE_DURATION); } else { this->setZoomScale(s); } } void CCScrollView::setZoomScaleInDuration(float s, float dt) { if (dt > 0) { if (m_pContainer->getScale() != s) { CCActionTween *scaleAction; scaleAction = CCActionTween::create(dt, "zoomScale", m_pContainer->getScale(), s); this->runAction(scaleAction); } } else { this->setZoomScale(s); } } void CCScrollView::setViewSize(CCSize size) { m_tViewSize = size; CCLayer::setContentSize(size); } CCNode * CCScrollView::getContainer() { return this->m_pContainer; } void CCScrollView::setContainer(CCNode * pContainer) { this->removeAllChildrenWithCleanup(true); if (!pContainer) return; this->m_pContainer = pContainer; this->m_pContainer->ignoreAnchorPointForPosition(false); this->m_pContainer->setAnchorPoint(ccp(0.0f, 0.0f)); this->addChild(this->m_pContainer); this->setViewSize(this->m_tViewSize); } void CCScrollView::relocateContainer(bool animated) { CCPoint oldPoint, min, max; float newX, newY; min = this->minContainerOffset(); max = this->maxContainerOffset(); oldPoint = m_pContainer->getPosition(); newX = oldPoint.x; newY = oldPoint.y; if (m_eDirection == kCCScrollViewDirectionBoth || m_eDirection == kCCScrollViewDirectionHorizontal) { newX = MAX(newX, min.x); newX = MIN(newX, max.x); } if (m_eDirection == kCCScrollViewDirectionBoth || m_eDirection == kCCScrollViewDirectionVertical) { newY = MIN(newY, max.y); newY = MAX(newY, min.y); } if (newY != oldPoint.y || newX != oldPoint.x) { this->setContentOffset(ccp(newX, newY), animated); } } CCPoint CCScrollView::maxContainerOffset() { return ccp(0.0f, 0.0f); } CCPoint CCScrollView::minContainerOffset() { return ccp(m_tViewSize.width - m_pContainer->getContentSize().width*m_pContainer->getScaleX(), m_tViewSize.height - m_pContainer->getContentSize().height*m_pContainer->getScaleY()); } void CCScrollView::deaccelerateScrolling(float dt) { if (m_bDragging) { this->unschedule(schedule_selector(CCScrollView::deaccelerateScrolling)); return; } float newX, newY; CCPoint maxInset, minInset; m_pContainer->setPosition(ccpAdd(m_pContainer->getPosition(), m_tScrollDistance)); if (m_bBounceable) { maxInset = m_fMaxInset; minInset = m_fMinInset; } else { maxInset = this->maxContainerOffset(); minInset = this->minContainerOffset(); } //check to see if offset lies within the inset bounds newX = MIN(m_pContainer->getPosition().x, maxInset.x); newX = MAX(newX, minInset.x); newY = MIN(m_pContainer->getPosition().y, maxInset.y); newY = MAX(newY, minInset.y); newX = m_pContainer->getPosition().x; newY = m_pContainer->getPosition().y; m_tScrollDistance = ccpSub(m_tScrollDistance, ccp(newX - m_pContainer->getPosition().x, newY - m_pContainer->getPosition().y)); m_tScrollDistance = ccpMult(m_tScrollDistance, SCROLL_DEACCEL_RATE); this->setContentOffset(ccp(newX,newY)); if ((fabsf(m_tScrollDistance.x) <= SCROLL_DEACCEL_DIST && fabsf(m_tScrollDistance.y) <= SCROLL_DEACCEL_DIST) || newY > maxInset.y || newY < minInset.y || newX > maxInset.x || newX < minInset.x || newX == maxInset.x || newX == minInset.x || newY == maxInset.y || newY == minInset.y) { this->unschedule(schedule_selector(CCScrollView::deaccelerateScrolling)); this->relocateContainer(true); } } void CCScrollView::stoppedAnimatedScroll(CCNode * node) { this->unschedule(schedule_selector(CCScrollView::performedAnimatedScroll)); // After the animation stopped, "scrollViewDidScroll" should be invoked, this could fix the bug of lack of tableview cells. if (m_pDelegate != NULL) { m_pDelegate->scrollViewDidScroll(this); } } void CCScrollView::performedAnimatedScroll(float dt) { if (m_bDragging) { this->unschedule(schedule_selector(CCScrollView::performedAnimatedScroll)); return; } if (m_pDelegate != NULL) { m_pDelegate->scrollViewDidScroll(this); } } const CCSize& CCScrollView::getContentSize() { return m_pContainer->getContentSize(); } void CCScrollView::setContentSize(const CCSize & size) { if (this->getContainer() != NULL) { this->getContainer()->setContentSize(size); this->updateInset(); } } void CCScrollView::updateInset() { if (this->getContainer() != NULL) { m_fMaxInset = this->maxContainerOffset(); m_fMaxInset = ccp(m_fMaxInset.x + m_tViewSize.width * INSET_RATIO, m_fMaxInset.y + m_tViewSize.height * INSET_RATIO); m_fMinInset = this->minContainerOffset(); m_fMinInset = ccp(m_fMinInset.x - m_tViewSize.width * INSET_RATIO, m_fMinInset.y - m_tViewSize.height * INSET_RATIO); } } /** * make sure all children go to the container */ void CCScrollView::addChild(CCNode * child, int zOrder, int tag) { child->ignoreAnchorPointForPosition(false); child->setAnchorPoint(ccp(0.0f, 0.0f)); if (m_pContainer != child) { m_pContainer->addChild(child, zOrder, tag); } else { CCLayer::addChild(child, zOrder, tag); } } void CCScrollView::addChild(CCNode * child, int zOrder) { this->addChild(child, zOrder, child->getTag()); } void CCScrollView::addChild(CCNode * child) { this->addChild(child, child->getZOrder(), child->getTag()); } /** * clip this view so that outside of the visible bounds can be hidden. */ void CCScrollView::beforeDraw() { if (m_bClippingToBounds) { m_bScissorRestored = false; CCRect frame = getViewRect(); if (CCEGLView::sharedOpenGLView()->isScissorEnable()) { m_bScissorRestored = true; m_tParentScissorRect = CCEGLView::sharedOpenGLView()->getScissorRect(); //set the intersection of m_tParentScissorRect and frame as the new scissor rect if (frame.intersectsRect(m_tParentScissorRect)) { float x = MAX(frame.origin.x, m_tParentScissorRect.origin.x); float y = MAX(frame.origin.y, m_tParentScissorRect.origin.y); float xx = MIN(frame.origin.x+frame.size.width, m_tParentScissorRect.origin.x+m_tParentScissorRect.size.width); float yy = MIN(frame.origin.y+frame.size.height, m_tParentScissorRect.origin.y+m_tParentScissorRect.size.height); CCEGLView::sharedOpenGLView()->setScissorInPoints(x, y, xx-x, yy-y); } } else { glEnable(GL_SCISSOR_TEST); CCEGLView::sharedOpenGLView()->setScissorInPoints(frame.origin.x, frame.origin.y, frame.size.width, frame.size.height); } } } /** * retract what's done in beforeDraw so that there's no side effect to * other nodes. */ void CCScrollView::afterDraw() { if (m_bClippingToBounds) { if (m_bScissorRestored) {//restore the parent's scissor rect CCEGLView::sharedOpenGLView()->setScissorInPoints(m_tParentScissorRect.origin.x, m_tParentScissorRect.origin.y, m_tParentScissorRect.size.width, m_tParentScissorRect.size.height); } else { glDisable(GL_SCISSOR_TEST); } } } void CCScrollView::visit() { // quick return if not visible if (!isVisible()) { return; } kmGLPushMatrix(); if (m_pGrid && m_pGrid->isActive()) { m_pGrid->beforeDraw(); this->transformAncestors(); } this->transform(); this->beforeDraw(); if(m_pChildren) { ccArray *arrayData = m_pChildren->data; unsigned int i=0; // draw children zOrder < 0 for( ; i < arrayData->num; i++ ) { CCNode *child = (CCNode*)arrayData->arr[i]; if ( child->getZOrder() < 0 ) { child->visit(); } else { break; } } // this draw this->draw(); // draw children zOrder >= 0 for( ; i < arrayData->num; i++ ) { CCNode* child = (CCNode*)arrayData->arr[i]; child->visit(); } } else { this->draw(); } this->afterDraw(); if ( m_pGrid && m_pGrid->isActive()) { m_pGrid->afterDraw(this); } kmGLPopMatrix(); } bool CCScrollView::ccTouchBegan(CCTouch* touch, CCEvent* event) { if (!this->isVisible()) { return false; } CCRect frame = getViewRect(); //dispatcher does not know about clipping. reject touches outside visible bounds. if (m_pTouches->count() > 2 || m_bTouchMoved || !frame.containsPoint(m_pContainer->convertToWorldSpace(m_pContainer->convertTouchToNodeSpace(touch)))) { return false; } if (!m_pTouches->containsObject(touch)) { m_pTouches->addObject(touch); } if (m_pTouches->count() == 1) { // scrolling m_tTouchPoint = this->convertTouchToNodeSpace(touch); m_bTouchMoved = false; m_bDragging = true; //dragging started m_tScrollDistance = ccp(0.0f, 0.0f); m_fTouchLength = 0.0f; } else if (m_pTouches->count() == 2) { m_tTouchPoint = ccpMidpoint(this->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(0)), this->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(1))); m_fTouchLength = ccpDistance(m_pContainer->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(0)), m_pContainer->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(1))); m_bDragging = false; } return true; } void CCScrollView::ccTouchMoved(CCTouch* touch, CCEvent* event) { if (!this->isVisible()) { return; } if (m_pTouches->containsObject(touch)) { if (m_pTouches->count() == 1 && m_bDragging) { // scrolling CCPoint moveDistance, newPoint, maxInset, minInset; CCRect frame; float newX, newY; frame = getViewRect(); newPoint = this->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(0)); moveDistance = ccpSub(newPoint, m_tTouchPoint); float dis = 0.0f; if (m_eDirection == kCCScrollViewDirectionVertical) { dis = moveDistance.y; } else if (m_eDirection == kCCScrollViewDirectionHorizontal) { dis = moveDistance.x; } else { dis = sqrtf(moveDistance.x*moveDistance.x + moveDistance.y*moveDistance.y); } if (!m_bTouchMoved && fabs(convertDistanceFromPointToInch(dis)) < MOVE_INCH ) { //CCLOG("Invalid movement, distance = [%f, %f], disInch = %f", moveDistance.x, moveDistance.y); return; } if (!m_bTouchMoved) { moveDistance = CCPointZero; } m_tTouchPoint = newPoint; m_bTouchMoved = true; if (frame.containsPoint(this->convertToWorldSpace(newPoint))) { switch (m_eDirection) { case kCCScrollViewDirectionVertical: moveDistance = ccp(0.0f, moveDistance.y); break; case kCCScrollViewDirectionHorizontal: moveDistance = ccp(moveDistance.x, 0.0f); break; default: break; } maxInset = m_fMaxInset; minInset = m_fMinInset; newX = m_pContainer->getPosition().x + moveDistance.x; newY = m_pContainer->getPosition().y + moveDistance.y; m_tScrollDistance = moveDistance; this->setContentOffset(ccp(newX, newY)); } } else if (m_pTouches->count() == 2 && !m_bDragging) { const float len = ccpDistance(m_pContainer->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(0)), m_pContainer->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(1))); this->setZoomScale(this->getZoomScale()*len/m_fTouchLength); } } } void CCScrollView::ccTouchEnded(CCTouch* touch, CCEvent* event) { if (!this->isVisible()) { return; } if (m_pTouches->containsObject(touch)) { if (m_pTouches->count() == 1 && m_bTouchMoved) { this->schedule(schedule_selector(CCScrollView::deaccelerateScrolling)); } m_pTouches->removeObject(touch); } if (m_pTouches->count() == 0) { m_bDragging = false; m_bTouchMoved = false; } } void CCScrollView::ccTouchCancelled(CCTouch* touch, CCEvent* event) { if (!this->isVisible()) { return; } m_pTouches->removeObject(touch); if (m_pTouches->count() == 0) { m_bDragging = false; m_bTouchMoved = false; } } CCRect CCScrollView::getViewRect() { CCPoint screenPos = this->convertToWorldSpace(CCPointZero); float scaleX = this->getScaleX(); float scaleY = this->getScaleY(); for (CCNode *p = m_pParent; p != NULL; p = p->getParent()) { scaleX *= p->getScaleX(); scaleY *= p->getScaleY(); } return CCRectMake(screenPos.x, screenPos.y, m_tViewSize.width*scaleX, m_tViewSize.height*scaleY); } NS_CC_EXT_END