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// SPDX-License-Identifier: GPL-2.0
#include "qt-models/divepicturemodel.h"
#include "core/dive.h"
#include "core/metrics.h"
#include "core/divelist.h"
#include "core/imagedownloader.h"
#include "core/qthelper.h"
#include "core/metadata.h"
#include <QtConcurrent>
static const int maxZoom = 3; // Maximum zoom: thrice of standard size
static QImage getThumbnailFromCache(const PictureEntry &entry)
{
// First, check if we know a hash for this filename
QString filename = thumbnailFileName(entry.filename);
if (filename.isEmpty())
return QImage();
QFile file(filename);
if (!file.open(QIODevice::ReadOnly))
return QImage();
QDataStream stream(&file);
// Each thumbnail file is composed of a media-type and an image file.
// Currently, the type is ignored. This will be used to mark videos.
quint32 type;
QImage res;
stream >> type;
stream >> res;
return res;
}
static void addThumbnailToCache(const QImage &thumbnail, const PictureEntry &entry)
{
if (thumbnail.isNull())
return;
QString filename = thumbnailFileName(entry.filename);
// If we got a thumbnail, we are guaranteed to have its hash and therefore
// thumbnailFileName() should return a filename.
if (filename.isEmpty()) {
qWarning() << "Internal error: can't get filename of recently created thumbnail";
return;
}
QSaveFile file(filename);
if (!file.open(QIODevice::WriteOnly))
return;
QDataStream stream(&file);
// For format of the file, see comments in getThumnailForCache
quint32 type = MEDIATYPE_PICTURE;
stream << type;
stream << thumbnail;
file.commit();
}
static void scaleImages(PictureEntry &entry, int maxSize)
{
QImage thumbnail = getThumbnailFromCache(entry);
// If thumbnails were written by an earlier version, they might be smaller than needed.
// Rescale in such a case to avoid resizing artifacts.
if (thumbnail.isNull() || (thumbnail.size().width() < maxSize && thumbnail.size().height() < maxSize)) {
qDebug() << "No thumbnail in cache for" << entry.filename;
thumbnail = getHashedImage(entry.picture).scaled(maxSize, maxSize, Qt::KeepAspectRatio);
addThumbnailToCache(thumbnail, entry);
}
entry.image = thumbnail;
}
DivePictureModel *DivePictureModel::instance()
{
static DivePictureModel *self = new DivePictureModel();
return self;
}
DivePictureModel::DivePictureModel() : rowDDStart(0),
rowDDEnd(0),
zoomLevel(0.0),
defaultSize(defaultIconMetrics().sz_pic)
{
}
void DivePictureModel::updateDivePicturesWhenDone(QList<QFuture<void>> futures)
{
Q_FOREACH (QFuture<void> f, futures) {
f.waitForFinished();
}
updateDivePictures();
}
void DivePictureModel::setZoomLevel(int level)
{
zoomLevel = level / 10.0;
// zoomLevel is bound by [-1.0 1.0], see comment below.
if (zoomLevel < -1.0)
zoomLevel = -1.0;
if (zoomLevel > 1.0)
zoomLevel = 1.0;
updateZoom();
layoutChanged();
}
void DivePictureModel::updateZoom()
{
// Calculate size of thumbnails. The standard size is defaultIconMetrics().sz_pic.
// We use exponential scaling so that the central point is the standard
// size and the minimum and maximum extreme points are a third respectively
// three times the standard size.
// Naturally, these three zoom levels are then represented by
// -1.0 (minimum), 0 (standard) and 1.0 (maximum). The actual size is
// calculated as standard_size*3.0^zoomLevel.
size = static_cast<int>(round(defaultSize * pow(maxZoom, zoomLevel)));
}
void DivePictureModel::updateThumbnails()
{
int maxSize = defaultSize * maxZoom;
updateZoom();
QtConcurrent::blockingMap(pictures, [maxSize](PictureEntry &entry){scaleImages(entry, maxSize);});
}
void DivePictureModel::updateDivePictures()
{
if (!pictures.isEmpty()) {
beginRemoveRows(QModelIndex(), 0, pictures.count() - 1);
pictures.clear();
endRemoveRows();
rowDDStart = rowDDEnd = 0;
}
// if the dive_table is empty, quit
if (dive_table.nr == 0)
return;
int i;
struct dive *dive;
for_each_dive (i, dive) {
if (dive->selected) {
if (dive->id == displayed_dive.id)
rowDDStart = pictures.count();
FOR_EACH_PICTURE(dive)
pictures.push_back({picture, picture->filename, {}, picture->offset.seconds});
if (dive->id == displayed_dive.id)
rowDDEnd = pictures.count();
}
}
updateThumbnails();
if (!pictures.isEmpty()) {
beginInsertRows(QModelIndex(), 0, pictures.count() - 1);
endInsertRows();
}
}
int DivePictureModel::columnCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return 2;
}
QVariant DivePictureModel::data(const QModelIndex &index, int role) const
{
QVariant ret;
if (!index.isValid())
return ret;
const PictureEntry &entry = pictures.at(index.row());
if (index.column() == 0) {
switch (role) {
case Qt::ToolTipRole:
ret = entry.filename;
break;
case Qt::DecorationRole:
ret = entry.image.scaled(size, size, Qt::KeepAspectRatio);
break;
case Qt::UserRole: // Used by profile widget to access bigger thumbnails
ret = entry.image.scaled(defaultSize, defaultSize, Qt::KeepAspectRatio);
break;
case Qt::DisplayRole:
ret = QFileInfo(entry.filename).fileName();
break;
case Qt::DisplayPropertyRole:
ret = QFileInfo(entry.filename).filePath();
}
} else if (index.column() == 1) {
switch (role) {
case Qt::UserRole:
ret = QVariant::fromValue(entry.offsetSeconds);
break;
case Qt::DisplayRole:
ret = entry.filename;
}
}
return ret;
}
void DivePictureModel::removePicture(const QString &fileUrl, bool last)
{
int i;
struct dive *dive;
for_each_dive (i, dive) {
if (dive->selected && dive_remove_picture(dive, qPrintable(fileUrl)))
break;
}
if (last) {
copy_dive(current_dive, &displayed_dive);
updateDivePictures();
mark_divelist_changed(true);
}
}
int DivePictureModel::rowCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return pictures.count();
}
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