axmol/cocos/gui/UIPageView.cpp

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2013-09-13 22:20:20 +08:00
/****************************************************************************
Copyright (c) 2013-2014 Chukong Technologies Inc.
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.
****************************************************************************/
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#include "gui/UIPageView.h"
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NS_CC_BEGIN
namespace gui {
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PageView::PageView():
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_curPageIdx(0),
_touchMoveDir(PAGEVIEW_TOUCHLEFT),
_touchStartLocation(0.0f),
_touchMoveStartLocation(0.0f),
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_movePagePoint(Point::ZERO),
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_leftChild(nullptr),
_rightChild(nullptr),
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_leftBoundary(0.0f),
_rightBoundary(0.0f),
_isAutoScrolling(false),
_autoScrollDistance(0.0f),
_autoScrollSpeed(0.0f),
_autoScrollDir(0),
_childFocusCancelOffset(5.0f),
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_pageViewEventListener(nullptr),
_pageViewEventSelector(nullptr)
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{
}
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PageView::~PageView()
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{
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_pages.clear();
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_pageViewEventListener = nullptr;
_pageViewEventSelector = nullptr;
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}
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PageView* PageView::create()
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{
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PageView* widget = new PageView();
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if (widget && widget->init())
{
widget->autorelease();
return widget;
}
CC_SAFE_DELETE(widget);
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return nullptr;
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}
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void PageView::onEnter()
{
Layout::onEnter();
scheduleUpdate();
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}
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bool PageView::init()
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{
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if (Layout::init())
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{
setClippingEnabled(true);
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setTouchEnabled(true);
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return true;
}
return false;
}
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void PageView::addWidgetToPage(Widget *widget, ssize_t pageIdx, bool forceCreate)
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{
if (!widget)
{
return;
}
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if (pageIdx < 0)
{
return;
}
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ssize_t pageCount = _pages.size();
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if (pageIdx < 0 || pageIdx >= pageCount)
{
if (forceCreate)
{
if (pageIdx > pageCount)
{
CCLOG("pageIdx is %d, it will be added as page id [%d]",static_cast<int>(pageIdx),static_cast<int>(pageCount));
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}
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Layout* newPage = createPage();
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newPage->addChild(widget);
addPage(newPage);
}
}
else
{
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Layout * page = _pages.at(pageIdx);
page->addChild(widget);
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}
}
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Layout* PageView::createPage()
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{
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Layout* newPage = Layout::create();
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newPage->setSize(getSize());
return newPage;
}
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void PageView::addPage(Layout* page)
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{
if (!page)
{
return;
}
if (page->getWidgetType() != WidgetTypeContainer)
{
return;
}
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if (_pages.contains(page))
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{
return;
}
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Size pSize = page->getSize();
Size pvSize = getSize();
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if (!pSize.equals(pvSize))
{
CCLOG("page size does not match pageview size, it will be force sized!");
page->setSize(pvSize);
}
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page->setPosition(Point(getPositionXByIndex(_pages.size()), 0));
_pages.pushBack(page);
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addChild(page);
updateBoundaryPages();
}
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void PageView::insertPage(Layout* page, int idx)
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{
if (idx < 0)
{
return;
}
if (!page)
{
return;
}
if (page->getWidgetType() != WidgetTypeContainer)
{
return;
}
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if (_pages.contains(page))
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{
return;
}
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ssize_t pageCount = _pages.size();
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if (idx >= pageCount)
{
addPage(page);
}
else
{
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_pages.insert(idx, page);
page->setPosition(Point(getPositionXByIndex(idx), 0));
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addChild(page);
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Size pSize = page->getSize();
Size pvSize = getSize();
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if (!pSize.equals(pvSize))
{
CCLOG("page size does not match pageview size, it will be force sized!");
page->setSize(pvSize);
}
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ssize_t length = _pages.size();
for (ssize_t i=(idx+1); i<length; i++){
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Widget* behindPage = _pages.at(i);
Point formerPos = behindPage->getPosition();
behindPage->setPosition(Point(formerPos.x+getSize().width, 0));
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}
updateBoundaryPages();
}
}
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void PageView::removePage(Layout* page)
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{
if (!page)
{
return;
}
removeChild(page);
updateChildrenPosition();
updateBoundaryPages();
}
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void PageView::removePageAtIndex(ssize_t index)
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{
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if (index < 0 || index >= _pages.size())
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{
return;
}
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Layout* page = _pages.at(index);
removePage(page);
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}
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void PageView::removeAllPages()
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{
removeAllChildren();
}
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void PageView::updateBoundaryPages()
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{
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if (_pages.size() <= 0)
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{
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_leftChild = nullptr;
_rightChild = nullptr;
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return;
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}
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_leftChild = _pages.at(0);
_rightChild = _pages.at(_pages.size()-1);
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}
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float PageView::getPositionXByIndex(ssize_t idx)
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{
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return (getSize().width*(idx-_curPageIdx));
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}
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void PageView::addChild(Node *child)
{
Layout::addChild(child);
}
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void PageView::addChild(Node * child, int zOrder)
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{
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Layout::addChild(child, zOrder);
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}
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void PageView::addChild(Node *child, int zOrder, int tag)
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{
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Layout::addChild(child, zOrder, tag);
}
void PageView::removeChild(Node *child, bool cleanup)
{
if (_pages.contains(static_cast<Layout*>(child)))
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{
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_pages.eraseObject(static_cast<Layout*>(child));
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}
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Layout::removeChild(child, cleanup);
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}
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void PageView::onSizeChanged()
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{
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Layout::onSizeChanged();
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_rightBoundary = getSize().width;
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updateChildrenSize();
updateChildrenPosition();
}
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void PageView::updateChildrenSize()
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{
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Size selfSize = getSize();
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for (auto& page : _pages)
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{
page->setSize(selfSize);
}
}
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void PageView::updateChildrenPosition()
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{
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ssize_t pageCount = _pages.size();
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if (pageCount <= 0)
{
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_curPageIdx = 0;
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return;
}
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if (_curPageIdx >= pageCount)
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{
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_curPageIdx = pageCount-1;
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}
float pageWidth = getSize().width;
for (int i=0; i<pageCount; i++)
{
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Layout* page = _pages.at(i);
page->setPosition(Point((i-_curPageIdx)*pageWidth, 0));
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}
}
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void PageView::removeAllChildren()
{
removeAllChildrenWithCleanup(true);
}
void PageView::removeAllChildrenWithCleanup(bool cleanup)
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{
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_pages.clear();
Layout::removeAllChildrenWithCleanup(cleanup);
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}
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void PageView::scrollToPage(ssize_t idx)
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{
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if (idx < 0 || idx >= _pages.size())
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{
return;
}
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_curPageIdx = idx;
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Widget* curPage = _pages.at(idx);
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_autoScrollDistance = -(curPage->getPosition().x);
_autoScrollSpeed = fabs(_autoScrollDistance)/0.2f;
_autoScrollDir = _autoScrollDistance > 0 ? 1 : 0;
_isAutoScrolling = true;
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}
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void PageView::update(float dt)
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{
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if (_isAutoScrolling)
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{
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switch (_autoScrollDir)
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{
case 0:
{
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float step = _autoScrollSpeed*dt;
if (_autoScrollDistance + step >= 0.0f)
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{
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step = -_autoScrollDistance;
_autoScrollDistance = 0.0f;
_isAutoScrolling = false;
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}
else
{
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_autoScrollDistance += step;
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}
scrollPages(-step);
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if (!_isAutoScrolling)
{
pageTurningEvent();
}
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break;
}
break;
case 1:
{
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float step = _autoScrollSpeed*dt;
if (_autoScrollDistance - step <= 0.0f)
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{
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step = _autoScrollDistance;
_autoScrollDistance = 0.0f;
_isAutoScrolling = false;
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}
else
{
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_autoScrollDistance -= step;
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}
scrollPages(step);
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if (!_isAutoScrolling)
{
pageTurningEvent();
}
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break;
}
default:
break;
}
}
}
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bool PageView::onTouchBegan(Touch *touch, Event *unusedEvent)
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{
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bool pass = Layout::onTouchBegan(touch, unusedEvent);
if (_hitted)
{
handlePressLogic(touch->getLocation());
}
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return pass;
}
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void PageView::onTouchMoved(Touch *touch, Event *unusedEvent)
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{
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_touchMovePos = touch->getLocation();
handleMoveLogic(_touchMovePos);
Widget* widgetParent = getWidgetParent();
if (widgetParent)
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{
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widgetParent->checkChildInfo(1,this,_touchMovePos);
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}
moveEvent();
}
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void PageView::onTouchEnded(Touch *touch, Event *unusedEvent)
{
Layout::onTouchEnded(touch, unusedEvent);
handleReleaseLogic(_touchEndPos);
}
void PageView::onTouchCancelled(Touch *touch, Event *unusedEvent)
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{
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Layout::onTouchCancelled(touch, unusedEvent);
handleReleaseLogic(touch->getLocation());
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}
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void PageView::movePages(float offset)
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{
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for (auto& page : _pages)
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{
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_movePagePoint.x = page->getPosition().x + offset;
_movePagePoint.y = page->getPosition().y;
page->setPosition(_movePagePoint);
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}
}
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bool PageView::scrollPages(float touchOffset)
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{
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if (_pages.size() <= 0)
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{
return false;
}
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if (!_leftChild || !_rightChild)
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{
return false;
}
float realOffset = touchOffset;
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switch (_touchMoveDir)
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{
case PAGEVIEW_TOUCHLEFT: // left
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if (_rightChild->getRightInParent() + touchOffset <= _rightBoundary)
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{
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realOffset = _rightBoundary - _rightChild->getRightInParent();
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movePages(realOffset);
return false;
}
break;
case PAGEVIEW_TOUCHRIGHT: // right
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if (_leftChild->getLeftInParent() + touchOffset >= _leftBoundary)
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{
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realOffset = _leftBoundary - _leftChild->getLeftInParent();
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movePages(realOffset);
return false;
}
break;
default:
break;
}
movePages(realOffset);
return true;
}
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void PageView::handlePressLogic(const Point &touchPoint)
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{
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Point nsp = convertToNodeSpace(touchPoint);
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_touchMoveStartLocation = nsp.x;
_touchStartLocation = nsp.x;
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}
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void PageView::handleMoveLogic(const Point &touchPoint)
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{
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Point nsp = convertToNodeSpace(touchPoint);
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float offset = 0.0;
float moveX = nsp.x;
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offset = moveX - _touchMoveStartLocation;
_touchMoveStartLocation = moveX;
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if (offset < 0)
{
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_touchMoveDir = PAGEVIEW_TOUCHLEFT;
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}
else if (offset > 0)
{
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_touchMoveDir = PAGEVIEW_TOUCHRIGHT;
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}
scrollPages(offset);
}
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void PageView::handleReleaseLogic(const Point &touchPoint)
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{
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if (_pages.size() <= 0)
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{
return;
}
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Widget* curPage = _pages.at(_curPageIdx);
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if (curPage)
{
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Point curPagePos = curPage->getPosition();
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ssize_t pageCount = _pages.size();
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float curPageLocation = curPagePos.x;
float pageWidth = getSize().width;
float boundary = pageWidth/2.0f;
if (curPageLocation <= -boundary)
{
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if (_curPageIdx >= pageCount-1)
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{
scrollPages(-curPageLocation);
}
else
{
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scrollToPage(_curPageIdx+1);
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}
}
else if (curPageLocation >= boundary)
{
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if (_curPageIdx <= 0)
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{
scrollPages(-curPageLocation);
}
else
{
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scrollToPage(_curPageIdx-1);
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}
}
else
{
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scrollToPage(_curPageIdx);
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}
}
}
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void PageView::checkChildInfo(int handleState,Widget* sender, const Point &touchPoint)
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{
interceptTouchEvent(handleState, sender, touchPoint);
}
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void PageView::interceptTouchEvent(int handleState, Widget *sender, const Point &touchPoint)
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{
switch (handleState)
{
case 0:
handlePressLogic(touchPoint);
break;
case 1:
{
float offset = 0;
offset = fabs(sender->getTouchStartPos().x - touchPoint.x);
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if (offset > _childFocusCancelOffset)
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{
sender->setFocused(false);
handleMoveLogic(touchPoint);
}
}
break;
case 2:
handleReleaseLogic(touchPoint);
break;
case 3:
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handleReleaseLogic(touchPoint);
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break;
}
}
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void PageView::pageTurningEvent()
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{
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if (_pageViewEventListener && _pageViewEventSelector)
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{
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(_pageViewEventListener->*_pageViewEventSelector)(this, PAGEVIEW_EVENT_TURNING);
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}
}
void PageView::addEventListenerPageView(Ref *target, SEL_PageViewEvent selector)
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{
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_pageViewEventListener = target;
_pageViewEventSelector = selector;
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}
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ssize_t PageView::getCurPageIndex() const
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{
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return _curPageIdx;
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}
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Vector<Layout*>& PageView::getPages()
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{
return _pages;
}
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Layout* PageView::getPage(ssize_t index)
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{
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if (index < 0 || index >= _pages.size())
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{
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return nullptr;
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}
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return _pages.at(index);
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}
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std::string PageView::getDescription() const
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{
return "PageView";
}
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Widget* PageView::createCloneInstance()
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{
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return PageView::create();
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}
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void PageView::copyClonedWidgetChildren(Widget* model)
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{
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auto& modelPages = static_cast<PageView*>(model)->getPages();
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for (auto& page : modelPages)
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{
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addPage(dynamic_cast<Layout*>(page->clone()));
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}
}
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void PageView::copySpecialProperties(Widget *widget)
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{
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PageView* pageView = dynamic_cast<PageView*>(widget);
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if (pageView)
{
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Layout::copySpecialProperties(widget);
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}
}
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}
NS_CC_END