void Settings::setThumbnailSize(int size)
{
if (size != thumbnailSize()) {
QSettings().setValue(QStringLiteral("thumbnailSize"), size);
emit thumbnailSizeChanged();
}
}
Thumbnail::Thumbnail(const QPixmap &originalPixmap)
{
QPixmap pixmap = originalPixmap.scaled(PixmapSize, PixmapSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
QPixmap shadow;
QRect pixmapRect(Margin + PixmapSize / 2 - pixmap.size().width() / 2, Margin + PixmapSize / 2 - pixmap.size().height() / 2, pixmap.size().width(), pixmap.size().height());
if (_shadowCache.contains(pixmap.size()))
{
shadow = _shadowCache.value(pixmap.size());
}
else
{
shadow = QPixmap(thumbnailSize());
shadow.fill(Qt::transparent);
QGraphicsScene scene(shadow.rect());
auto rectItem = scene.addRect(pixmapRect, Qt::NoPen, Qt::white);
QGraphicsDropShadowEffect effect(0);
effect.setBlurRadius(6);
effect.setOffset(0);
rectItem->setGraphicsEffect(&effect);
QPainter painter(&shadow);
scene.render(&painter);
painter.end();
_shadowCache.insert(pixmap.size(), shadow);
}
_thumbnail = shadow;
QPainter painter(&_thumbnail);
painter.drawPixmap(pixmapRect.topLeft(), pixmap);
}
bool makeThumbnail(const QString & path,
ThumbnailType type)
{
QFileInfo info(path);
ContentThumbnail db(info.path());
QImage thumbnail;
if (!db.loadThumbnail(path, THUMBNAIL_LARGE, thumbnail))
{
// So far, only support image thumbnail in explorer.
// The viewer can generate thumbnail themselves.
if (!isImage(info.suffix()))
{
return false;
}
// Try to load it if it's a image.
if (!thumbnail.load(path))
{
return false;
}
thumbnail = thumbnail.scaled(thumbnailSize(THUMBNAIL_LARGE), Qt::IgnoreAspectRatio);
db.storeThumbnail(info.fileName(), THUMBNAIL_LARGE, thumbnail);
// Return true even the thumbnail can not be stored.
return true;
}
return true;
}
