qt 图片列表控件，可以显示多图片并且可以放大缩小非常方便

/**************************************************************** ** ImageView ** 图片浏览界面 ** ** ImageView.cpp ** ** Zhou Tao 2017-05-18T10:52:16 ** ** QQ : 741301964 ** ** 深圳市XX电子股份有限公司 ** ****************************************************************/ #include "imageview.h" #include <QPainter> #include <QDebug> ImageView::ImageView(QWidget *parent, int width, int height) : QWidget(parent),m_nWidth(width),m_nHeight(height) { //图片加载 for(int itemNum=0;itemNum<3;itemNum++) { QGraphicsScene *scene = new QGraphicsScene(0,0,1024,600); CustomGraphicsView *view = new CustomGraphicsView(scene,this,false); view->setGeometry(-1024+itemNum*1024,0,1024,600); view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view->centerOn(0.0,0.0);//确保scene显示居中 BlackPixmapItem *pItem = new BlackPixmapItem(185,120,false); scene->addItem(pItem); QPoint point = QPoint(0,0); pItem->setPos(view->mapToScene(point)); m_pListItem.append(pItem); m_listWidget.append(view); } //底部控件 m_BottomWidget = new QWidget(this); m_BottomWidget->setGeometry(0,515,1024,85); m_BottomWidget->installEventFilter(this); m_BottomWidget->close(); //自动播放按键 m_autoplaybutton = new QPushButton(m_BottomWidget); m_autoplaybutton->setText("播放"); m_autoplaybutton->setObjectName("autoplay"); m_autoplaybutton->setGeometry(73,0,157,85); //目录 m_filelistbutton = new QPushButton(m_BottomWidget); m_filelistbutton->setText("目录"); m_filelistbutton->setGeometry(793,0,157,85); //放大 m_enlargementbutton = new QPushButton(m_BottomWidget); m_enlargementbutton->setText("放大"); m_enlargementbutton->setObjectName("enlarge"); m_enlargementbutton->setGeometry(73+157+23,0,157,85); //缩小 m_shrinkbutton = new QPushButton(m_BottomWidget); m_shrinkbutton->setText("缩小"); m_shrinkbutton->setObjectName("shrink"); m_shrinkbutton->setGeometry(73+157+23+157+23,0,157,85); //预览 m_previewbutton = new QPushButton(m_BottomWidget); m_previewbutton->setText("预览"); m_previewbutton->setObjectName("preview"); m_previewbutton->setGeometry(73+157+23+157+23+157+23,0,157,85); m_backbutton = new QPushButton(this);//返回 m_backbutton->setText("返回"); m_backbutton->setObjectName("back"); m_backbutton->setGeometry(32+54+28,20,54,54); //按键信号与槽 connect(m_autoplaybutton, SIGNAL(pressed()), this, SLOT(slot_buttonClick())); connect(m_enlargementbutton, SIGNAL(pressed()), this, SLOT(slot_buttonClick())); connect(m_shrinkbutton, SIGNAL(pressed()), this,SLOT(slot_buttonClick())); connect(m_backbutton, SIGNAL(pressed()), this, SLOT(slot_buttonClick())); connect(m_previewbutton, SIGNAL(pressed()), this, SLOT(slot_buttonClick())); //底部窗口动画 m_pShowAnimation = new QPropertyAnimation(m_BottomWidget, "pos"); m_pCloseAnimation = new QPropertyAnimation(m_BottomWidget, "pos"); connect(m_pCloseAnimation,SIGNAL(finished()),m_BottomWidget,SLOT(hide())); //定时器 定时10s关闭上下窗口 timer = new QTimer(); //设置定时器每个多少毫秒发送一个timeout()信号 10s timer->setInterval(10000); connect(timer, SIGNAL(timeout()), this, SLOT(slot_mouseClick())); //图片自动播放定时器 autoplaytimer = new QTimer(); autoplaytimer->setInterval(4000);//2s connect(autoplaytimer, SIGNAL(timeout()), this, SLOT(slot_autoplay())); m_nMoveTotalSize = 0;//总移动距离 scaleFactor = 1.0;//缩放因子 m_isMove = false;//是否移动鼠标 m_nCurrentIndex = 0;//路径索引 } ImageView::~ImageView() { for(int i = 0;i<m_listWidget.size() ;i++) { delete m_listWidget.value(i); } } //设置可隐藏界面定时器是否开启 true开启 false关闭 void ImageView::setTimerstart(bool start) { start?(timer->start()):(timer->stop()); //处理自动图片播放定时器如果打开则关闭 if(autoplaytimer->isActive()) autoplaytimer->stop(); } void ImageView::closeBottomWidget() { m_pCloseAnimation->setDuration(400); m_pCloseAnimation->setStartValue(QPoint(0,515)); m_pCloseAnimation->setEndValue(QPoint(0,600)); m_pCloseAnimation->setEasingCurve(QEasingCurve::Linear);//缓和曲线 m_pCloseAnimation->start(); //如果定时器开启，则关闭 if(timer->isActive()) { timer->stop(); } } void ImageView::showBottomWidget() { m_BottomWidget->show(); m_pShowAnimation->setDuration(400); m_pShowAnimation->setStartValue(QPoint(0,600)); m_pShowAnimation->setEndValue(QPoint(0,515)); m_pShowAnimation->setEasingCurve(QEasingCurve::Linear);//缓和曲线 m_pShowAnimation->start(); //如果定时器关闭，则开启 if(!timer->isActive()) { timer->start(); } } void ImageView::slot_autoplay() { if((m_nCurrentIndex+1) == m_listImagePath.size()) { BlackPixmapItem *pItem = getPixmapItem(m_listWidget.value(2)); pItem->setVisible(true); readImageFile(m_listImagePath.value(0),2);//显示第一个 emit sign_pageTurning(0,m_nCurrentIndex);//翻到第一页 } else if(m_nCurrentIndex/12 != (m_nCurrentIndex+1)/12) { emit sign_pageTurning((m_nCurrentIndex+1)/12,m_nCurrentIndex);//预览翻页 } //自动播放图片 //第一个不移动 for(int i = 1;i<m_listWidget.size() ;i++) { QPoint endPos = QPoint(m_listWidget.value(i)->x() - m_nWidth,0); m_listWidget.value(i)->moveWidgetAnimation(m_listWidget.value(i)->pos(),endPos,400); } //第一个item移到最后 m_listWidget.first()->move(m_nWidth,0); CustomGraphicsView *m_pImageLoad = m_listWidget.takeFirst(); //更新最后一个item m_nCurrentIndex++; m_listWidget.append(m_pImageLoad); if(m_nCurrentIndex == m_listImagePath.size()) m_nCurrentIndex = 0; emit sign_getItemPixmap(m_nCurrentIndex+1,2); } //显示顶部底部控件 void ImageView::showWidget() { showBottomWidget(); //显示底部窗口 timer->start();//开启定时器 } //关闭顶部底部控件 void ImageView::closeWidget(int duration) { timer->stop(); closeBottomWidget(); closeViewAnimation(QRect(0,0,0,0),duration); } //鼠标按下 void ImageView::mousePressEvent(QMouseEvent *ev) { if(autoplaytimer->isActive()) autoplaytimer->stop(); mousePress(ev->pos()); } //鼠标松开 void ImageView::mouseReleaseEvent(QMouseEvent *ev) { if(m_isMove) mouseRelease(ev->pos()); else slot_mouseClick(); m_isMove = false;//是否移动鼠标 m_releaseTime = QTime::currentTime();//鼠标释放时间 } void ImageView::mouseMoveEvent(QMouseEvent *ev) { int releaseTime = m_releaseTime.msecsTo(QTime::currentTime()); if(releaseTime < 200) //两次按下时间小于300ms,不响应,防止不停滑动 { m_isMove = true;//是否移动鼠标 return; } mouseMove(ev->pos()); m_isMove = true;//是否移动鼠标 } //过滤掉底部窗口鼠标事件，防止按下的时候拖动 bool ImageView::eventFilter(QObject *watched, QEvent *event) { ; } void ImageView::slot_mouseClick() { if(m_BottomWidget->isHidden()) { showBottomWidget(); //显示底部窗口 }else { closeBottomWidget(); //关闭底部窗口 } } //窗口显示动画