tail.cpp
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#include <QtConcurrentRun>
#include "tail.h"
#include <assert.h>
using namespace br;
/**** TAIL ****/
/*** PUBLIC ***/
Tail::Tail(QWidget *parent)
: QWidget(parent)
{
layout = new QHBoxLayout(this);
layout->setContentsMargins(0, 0, 0, 0);
slider = new QSlider(this);
slider->setOrientation(Qt::Horizontal);
lhs = new QLabel(this);
rhs = new QLabel(this);
layout->addWidget(lhs);
layout->addWidget(slider, 1);
layout->addWidget(rhs);
setFocusPolicy(Qt::StrongFocus);
setVisible(false);
connect(slider, SIGNAL(valueChanged(int)), this, SLOT(setIndex(int)));
connect(&compareWatcher, SIGNAL(finished()), this, SLOT(compareDone()));
}
/*** PUBLIC SLOTS ***/
void Tail::clear()
{
targetGallery = File();
queryGallery = File();
targetFiles.clear();
queryFiles.clear();
scores.clear();
slider->setMaximum(0);
setIndex(0);
setVisible(false);
}
void Tail::setIndex(int index)
{
index = std::min(std::max(slider->minimum(), index), slider->maximum());
slider->setValue(index);
emit newTargetFile((index >= 0) && (index < targetFiles.size()) ? targetFiles[index] : File());
emit newQueryFile((index >= 0) && (index < queryFiles.size()) ? queryFiles[index] : File());
emit newScore((index >= 0) && (index < scores.size()) ? scores[index] : std::numeric_limits<float>::quiet_NaN());
}
void Tail::setTargetGallery(const File &gallery)
{
targetGallery = gallery;
compare();
}
void Tail::setQueryGallery(const File &gallery)
{
queryGallery = gallery;
compare();
}
/*** PROTECTED ***/
void Tail::keyPressEvent(QKeyEvent *event)
{
QWidget::keyPressEvent(event);
event->accept();
if (event->key() == Qt::Key_Up) first();
else if (event->key() == Qt::Key_Left) previous();
else if (event->key() == Qt::Key_Right) next();
else if (event->key() == Qt::Key_Down) last();
}
void Tail::wheelEvent(QWheelEvent *event)
{
QWidget::wheelEvent(event);
event->accept();
if (event->delta() < 0) next();
else previous();
}
/*** PRIVATE ***/
void Tail::compare()
{
targetFiles.clear();
queryFiles.clear();
scores.clear();
if (targetGallery.isNull() || queryGallery.isNull()) {
if (!targetGallery.isNull()) targetFiles = TemplateList::fromGallery(targetGallery).files();
if (!queryGallery.isNull()) queryFiles = TemplateList::fromGallery(queryGallery).files();
slider->setMaximum(std::max(targetFiles.size(), queryFiles.size()) - 1);
lhs->setText("First Image");
rhs->setText("Last Image");
setVisible(slider->maximum() > 1);
setIndex(0);
} else {
compareWatcher.setFuture(QtConcurrent::run(Compare, targetGallery.flat(), queryGallery.flat(), QString("buffer.tail[atMost=1000]")));
}
}
void Tail::first()
{
setIndex(0);
}
void Tail::previous()
{
setIndex(slider->value()-1);
}
void Tail::next()
{
setIndex(slider->value()+1);
}
void Tail::last()
{
setIndex(scores.size()-1);
}
void Tail::compareDone()
{
QStringList lines = QString(Globals->buffer).split('\n');
lines.takeFirst(); // Remove header
foreach (const QString &line, lines) {
const QStringList words = Object::parse(line);
if (words.size() != 3) qFatal("Invalid tail file.");
bool ok;
float score = words[0].toFloat(&ok); assert(ok);
targetFiles.append(words[1]);
queryFiles.append(words[2]);
scores.append(score);
}
slider->setMaximum(scores.size()-1);
lhs->setText("Best Match");
rhs->setText("Worst Match");
setVisible(slider->maximum() > 1);
setIndex(0);
}
#include "moc_tail.cpp"