#include <qapplication.h>#include "transactionthread.h"using namespace std;FlipTransaction::FlipTransaction(Qt::Orientation orient){    orientation = orient;}QImage FlipTransaction::apply(const QImage &image){    return image.mirror(orientation == Qt::Horizontal,                        orientation == Qt::Vertical);}QString FlipTransaction::messageStr(){    if (orientation == Qt::Horizontal)        return QObject::tr("Flipping image horizontally...");    else        return QObject::tr("Flipping image vertically...");}ResizeTransaction::ResizeTransaction(const QSize &newSize){    size = newSize;}QString ResizeTransaction::messageStr(){    return QObject::tr("Resizing image...");}QImage ResizeTransaction::apply(const QImage &image){    return image.smoothScale(size);}ConvertDepthTransaction::ConvertDepthTransaction(int newDepth){    depth = newDepth;}QImage ConvertDepthTransaction::apply(const QImage &image){    return image.convertDepth(depth);}QString ConvertDepthTransaction::messageStr(){    return QObject::tr("Converting image depth...");}TransactionStartEvent::TransactionStartEvent()    : QCustomEvent(TransactionStart){}void TransactionThread::setTargetWidget(QWidget *widget){    targetWidget = widget;}void TransactionThread::addTransaction(Transaction *transact){    QMutexLocker locker(&mutex);    transactions.push_back(transact);    if (!running())        start();}void TransactionThread::run(){    Transaction *transact;    for (;;) {        mutex.lock();        if (transactions.empty()) {            mutex.unlock();            break;        }        QImage oldImage = currentImage;        transact = *transactions.begin();        transactions.pop_front();        mutex.unlock();        TransactionStartEvent *event = new TransactionStartEvent;        event->message = transact->messageStr();        QApplication::postEvent(targetWidget, event);        QImage newImage = transact->apply(oldImage);        delete transact;        mutex.lock();        currentImage = newImage;        mutex.unlock();    }    QApplication::postEvent(targetWidget,                            new QCustomEvent(AllTransactionsDone));}void TransactionThread::setImage(const QImage &image){    QMutexLocker locker(&mutex);    currentImage = image.copy();}QImage TransactionThread::image(){    QMutexLocker locker(&mutex);    return currentImage.copy();}