QT5 卡片布局（QLayout）

#include "cardstacklayout.h" #include <cmath> #include <QLabel> #include <QPropertyAnimation> #include <QParallelAnimationGroup> #include <QGraphicsOpacityEffect> CardStackLayout::CardStackLayout(QWidget *parent, CardStackLayout::CardStackLayoutStyle style) : QLayout(parent) , m_cardstacklayout_style(style) , m_horizontal_center(true) , m_vertical_center(true) { m_animation_relevant.runing = false; m_animation_relevant.anitype = 1; m_animation_relevant.useani = true; m_non_first_transparent = true; m_north_spacing = 20; m_west_spacing = 20; setMargin(0); setSpacing(0); } CardStackLayout::~CardStackLayout() { destoryAll(); } void CardStackLayout::destoryAll() { QLayoutItem *item = NULL; while (item = takeAt(0)) { delete item; } } void CardStackLayout::addItem(QLayoutItem *item) { add(item, ZBottom); } void CardStackLayout::addWidget(QWidget *widget, CardStackLayout::Position position) { add(new QWidgetItem(widget), position); } void CardStackLayout::add(QLayoutItem *item, CardStackLayout::Position position) { if(Cascade == m_cardstacklayout_style) { item->setAlignment(Qt::AlignHCenter); ItemWrapper *p = new ItemWrapper(item); if(ZTop == position) { m_list.push_front(p); } else { m_list.append(p); } reLayer(); } // QWidget *w = item->widget(); // if(w) // { // w->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed); // w->show(); // } changeNonFirstTransparent(); invalidate(); } bool CardStackLayout::hasHeightForWidth() const { return false; } int CardStackLayout::count() const { return m_list.size(); } QLayoutItem *CardStackLayout::itemAt(int index) const { ItemWrapper *it = m_list.value(index); if (it) return it->item; else return 0; } QLayoutItem *CardStackLayout::takeAt(int index) { QLayoutItem *item = NULL; if (index >= 0 && index < m_list.size()) { ItemWrapper *layoutStruct = m_list.takeAt(index); item = layoutStruct->item; delete layoutStruct; } return item; } void CardStackLayout::setGeometry(const QRect &rect) { QLayout::setGeometry(rect); QRect rcpre, rcnow; QRect rccombination = calculateCombRect(rect); QPoint ptsrccenter = rccombination.center(); QPoint ptdstcenter = rect.center(); int woffset = abs(ptdstcenter.rx())-abs(ptsrccenter.rx()); int hoffset = abs(ptdstcenter.ry())-abs(ptsrccenter.ry()); if(!m_list.empty()) { ItemWrapper *p = m_list.at(0); rcnow = rect; rcnow.setSize(p->item->geometry().size()); if(m_horizontal_center) { rcnow.adjust(woffset,0,woffset,0); } if(m_vertical_center) { rcnow.adjust(0,hoffset,0,hoffset); } p->item->setGeometry(rcnow); rcpre = rcnow; } for (int i = 1; i < m_list.size(); ++i) { ItemWrapper *p = m_list.at(i); bool bok = calculateItemRect(rcpre,p,rcnow); if(!bok){ continue;} p->item->setGeometry(rcnow); rcpre = rcnow; } } QSize CardStackLayout::minimumSize() const { return calculateSize(MinimumSize); } QSize CardStackLayout::sizeHint() const { return calculateSize(SizeHint); } QSize CardStackLayout::calculateSize(CardStackLayout::SizeType sizeType) const { QSize totalSize(0,0); QRect rcpre, rcnow,rect(0,0,0,0); for (int i = 0; i < m_list.size(); ++i) { ItemWrapper *wrapper = m_list.at(i); QSize itemSize; if (sizeType == MinimumSize) { itemSize = wrapper->item->minimumSize(); } else // (sizeType == SizeHint) { itemSize = wrapper->item->sizeHint(); } ItemWrapper *p = m_list.at(i); rcpre = (0 == i)? p->item->geometry():rcpre; bool bok = calculateItemRect(rcpre,p,rcnow); if(!bok){ continue;} rcpre = rcnow; totalSize = totalSize.expandedTo(rcnow.size()); } return totalSize; } bool CardStackLayout::calculateItemRect(QRect rcpre, ItemWrapper *p, QRect &rcnow) const { if(NULL == p) { Q_ASSERT(NULL!=p); return false; } QWidget *w = p->item->widget(); rcnow = rcpre; tyPosValue::const_iterator it; it = p->mapPos.find(North); if(it!=p->mapPos.end()) { rcnow.setTop(rcpre.top()+it.value()); } else { rcnow.setTop(rcpre.top() + m_north_spacing); } it = p->mapPos.find(West); if(it!=p->mapPos.end()) { rcnow.setLeft(rcpre.left()+it.value()); } else { rcnow.setLeft(rcpre.left() + m_west_spacing); } if(NULL!=w) { rcnow.setRight(rcnow.left()+ w->size().width()); rcnow.setBottom(rcnow.top()+ w->size().height()); } else { QSize si = p->item->geometry().size(); rcnow.setRight(rcnow.left()+ si.width()); rcnow.setBottom(rcnow.top()+ si.height()); } return true; } QRect CardStackLayout::calculateCombRect(QRect rclayout) { QRect rcpre = rclayout, rcnow, rcmax = rclayout; if(!m_list.empty()) { rcmax.setSize(m_list.at(0)->item->geometry().size()); rcpre = rcmax; } for (int i = 1; i < m_list.size(); ++i) { ItemWrapper *p = m_list.at(i); bool bok = calculateItemRect(rcpre,p,rcnow); if(!bok){ continue;} rcmax = rcmax.united(rcnow); rcpre = rcnow; } return rcmax; } Qt::Orientations CardStackLayout::expandingDirections() const { return Qt::Horizontal | Qt::Vertical; } void CardStackLayout::adjustWideget(QWidget *widget, long posflag, int offset) { if(Q_NULLPTR == widget) return; int index; CardStackLayout::ItemWrapper *p = find(widget,&index); adjustItem(index,p,posflag,offset); } void CardStackLayout::adjustWideget(QWidget *widget, const CardStackLayout::tyPosValue &posvalue) { if(Q_NULLPTR == widget) return; int index; ItemWrapper *p = find(widget,&index); tyPosValue::const_iterator it = posvalue.begin(); while (it != posvalue.end() ) { adjustItem(index,p,it.key(),it.value()); ++it; } } void CardStackLayout::adjustWideget(int index, const CardStackLayout::tyPosValue &posvalue) { if(index<0 || index>=m_list.size()) return; ItemWrapper *p = m_list.at(index); tyPosValue::const_iterator it = posvalue.begin(); while (it != posvalue.end() ) { adjustItem(index,p,it.key(),it.value()); ++it; } } void CardStackLayout::adjustItem(int index, CardStackLayout::ItemWrapper *p, long posflag, int offset) { if(Q_NULLPTR == p || m_animation_relevant.runing) return; if(posflag & ZTop || posflag & ZBottom) { int newIndex = offset; int n = m_list.size(); if(posflag & ZTop) { newIndex = n>newIndex? newIndex: n-1; } else { newIndex = newIndex>0?0:newIndex; newIndex = n>abs(newIndex)? (n+newIndex-1): 0; } switchOrder(index,newIndex,p); } if( posflag & North || posflag & West) { if(posflag & North) { p->mapPos[North] = offset; } if(posflag & West) { p->mapPos[West] = offset; } invalidate(); } } void CardStackLayout::changeNonFirstTransparent() { QGraphicsOpacityEffect* pOpacityEffect =