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axmol/cocos2dx/extensions/CCScrollView/CCScrollView.cpp

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//
// SWScrollView.m
// SWGameLib
//
// Copyright (c) 2010-2012 cocos2d-x.org
// Copyright (c) 2010 Sangwoo Im
//
// 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 false 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.
//
// Created by Sangwoo Im on 6/3/10.
// Copyright 2010 Sangwoo Im. All rights reserved.
//
#include "CCScrollView.h"
#include "CCActionInterval.h"
#include "CCActionTween.h"
#include "CCActionInstant.h"
#include "CCPointExtension.h"
#include "CCTouchDispatcher.h"
#include "CCGrid.h"
#include "CCDirector.h"
#include "kazmath/GL/matrix.h"
#include "CCTouch.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
CCScrollView::CCScrollView()
: m_fZoomScale(0.0f)
, m_fMinZoomScale(0.0f)
, m_fMaxZoomScale(0.0f)
, m_pDelegate(NULL)
, m_bDragging(false)
, m_bBounceable(false)
, m_eDirection(CCScrollViewDirectionBoth)
, m_bClippingToBounds(false)
, m_pContainer(NULL)
, m_bTouchMoved(false)
, m_fTouchLength(0.0f)
, m_pTouches(NULL)
, m_fMinScale(0.0f)
, m_fMaxScale(0.0f)
{
}
CCScrollView::~CCScrollView()
{
m_pTouches->release();
}
CCScrollView* CCScrollView::viewWithViewSize(CCSize size, CCNode* container/* = NULL*/)
{
return CCScrollView::create(size, container);
}
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::node()
{
return CCScrollView::create();
}
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::node();
}
this->setViewSize(size);
setTouchEnabled(true);
m_pTouches = new CCArray();
m_pDelegate = NULL;
m_bBounceable = true;
m_bClippingToBounds = true;
//m_pContainer->setContentSize(CCSizeZero);
m_eDirection = CCScrollViewDirectionBoth;
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 CCRect::CCRectIntersectsRect(viewRect, 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::actionWithDuration(dt, offset);
expire = CCCallFuncN::actionWithTarget(this, callfuncN_selector(CCScrollView::stoppedAnimatedScroll));
m_pContainer->runAction(CCSequence::actions(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));
}
}
CCFloat 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::actionWithDuration(dt, "zoomScale", m_pContainer->getScale(), s);
this->runAction(scaleAction);
}
}
else
{
this->setZoomScale(s);
}
}
void CCScrollView::setViewSize(CCSize size)
{
m_tViewSize = size;
if (this->m_pContainer != 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);
}
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;
CCFloat newX, newY;
min = this->minContainerOffset();
max = this->maxContainerOffset();
oldPoint = m_pContainer->getPosition();
newX = oldPoint.x;
newY = oldPoint.y;
if (m_eDirection == CCScrollViewDirectionBoth || m_eDirection == CCScrollViewDirectionHorizontal)
{
newX = MIN(newX, max.x);
newX = MAX(newX, min.x);
}
if (m_eDirection == CCScrollViewDirectionBoth || m_eDirection == CCScrollViewDirectionVertical)
{
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;
}
CCFloat 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);
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) ||
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));
}
void CCScrollView::performedAnimatedScroll(float dt)
{
if (m_bDragging)
{
this->unschedule(schedule_selector(CCScrollView::performedAnimatedScroll));
return;
}
if (m_pDelegate != NULL)
{
m_pDelegate->scrollViewDidScroll(this);
}
}
CCSize CCScrollView::getContentSize()
{
return CCSizeMake(m_pContainer->getContentSize().width, m_pContainer->getContentSize().height);
}
void CCScrollView::setContentSize(CCSize size)
{
this->setViewSize(size);
}
/**
* 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)
{
// TODO: This scrollview should respect parents' positions
CCPoint screenPos = this->convertToWorldSpace(this->getParent()->getPosition());
glEnable(GL_SCISSOR_TEST);
float s = this->getScale();
CCDirector *director = CCDirector::sharedDirector();
s *= director->getContentScaleFactor();
glScissor((GLint)screenPos.x, (GLint)screenPos.y, (GLsizei)(m_tViewSize.width*s), (GLsizei)(m_tViewSize.height*s));
}
}
/**
* retract what's done in beforeDraw so that there's no side effect to
* other nodes.
*/
void CCScrollView::afterDraw()
{
if (m_bClippingToBounds)
{
glDisable(GL_SCISSOR_TEST);
}
}
void CCScrollView::visit()
{
// quick return if not visible
if (!isVisible())
{
return;
}
kmGLPushMatrix();
// glPushMatrix();
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();
// glPopMatrix();
}
bool CCScrollView::ccTouchBegan(CCTouch* touch, CCEvent* event)
{
if (!this->isVisible())
{
return false;
}
CCRect frame;
frame = CCRectMake(this->getPosition().x, this->getPosition().y, m_tViewSize.width, m_tViewSize.height);
//dispatcher does not know about clipping. reject touches outside visible bounds.
if (m_pTouches->count() > 2 ||
m_bTouchMoved ||
!CCRect::CCRectContainsPoint(frame, 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;
CCFloat newX, newY;
m_bTouchMoved = true;
frame = CCRectMake(this->getPosition().x, this->getPosition().y, m_tViewSize.width, m_tViewSize.height);
newPoint = this->convertTouchToNodeSpace((CCTouch*)m_pTouches->objectAtIndex(0));
moveDistance = ccpSub(newPoint, m_tTouchPoint);
m_tTouchPoint = newPoint;
if (CCRect::CCRectContainsPoint(frame, this->convertToWorldSpace(newPoint)))
{
switch (m_eDirection)
{
case CCScrollViewDirectionVertical:
moveDistance = ccp(0.0f, moveDistance.y);
break;
case CCScrollViewDirectionHorizontal:
moveDistance = ccp(moveDistance.x, 0.0f);
break;
default:
break;
}
m_pContainer->setPosition(ccpAdd(m_pContainer->getPosition(), moveDistance));
maxInset = m_fMaxInset;
minInset = m_fMinInset;
//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);
m_tScrollDistance = ccpSub(moveDistance, ccp(newX - m_pContainer->getPosition().x, newY - m_pContainer->getPosition().y));
this->setContentOffset(ccp(newX, newY));
}
}
else if (m_pTouches->count() == 2 && !m_bDragging)
{
const CCFloat 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;
}
}
NS_CC_EXT_END
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