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#include "scalelabel.h"
#include <QResizeEvent>
static bool isResourceMovie(const QString& path)
{
for (QByteArray format : QMovie::supportedFormats()) {
QString fileExtension = "." + QString::fromUtf8(format);
if (path.endsWith(fileExtension)) {
return true;
}
}
return false;
}
ScaleLabel::ScaleLabel(QWidget* parent) : QLabel(parent) {}
void ScaleLabel::setScalableResource(const QString& path)
{
if (auto m = movie()) {
setMovie(nullptr);
delete m;
m_OriginalMovieSize = QSize();
}
if (!pixmap().isNull()) {
setPixmap(QPixmap());
m_UnscaledImage = QImage();
}
if (path.isEmpty()) {
return;
}
if (isResourceMovie(path)) {
setScalableMovie(path);
} else {
setScalableImage(path);
}
}
void ScaleLabel::setStatic(bool isStatic)
{
m_isStatic = isStatic;
if (auto m = movie()) {
if (isStatic) {
m->stop();
} else {
m->start();
}
}
}
void ScaleLabel::setScalableMovie(const QString& path)
{
QMovie* m = new QMovie(path);
if (!m->isValid()) {
qWarning(">%s< is an invalid movie. Reason: %s", qUtf8Printable(path),
m->lastErrorString().toStdString().c_str());
delete m;
return;
}
m->setParent(this);
setMovie(m);
m->start();
m->stop();
m_OriginalMovieSize = m->currentImage().size();
m->setScaledSize(m_OriginalMovieSize.scaled(size(), Qt::KeepAspectRatio));
if (!m_isStatic) {
m->start();
}
}
void ScaleLabel::setScalableImage(const QString& path)
{
QImage image(path);
if (image.isNull()) {
qWarning(">%s< is a null image", qUtf8Printable(path));
} else {
m_UnscaledImage = image;
setPixmap(QPixmap::fromImage(image).scaled(size(), Qt::KeepAspectRatio));
}
}
void ScaleLabel::resizeEvent(QResizeEvent* event)
{
if (auto m = movie()) {
m->stop();
m->setScaledSize(m_OriginalMovieSize.scaled(event->size(), Qt::KeepAspectRatio));
m->start();
// We can't just skip the start() above since that is what triggers the label to
// resize the movie The only way to resize the movie but keep it paused is to start
// and then re-stop it
if (m_isStatic) {
m->stop();
}
}
auto p = pixmap();
if (!p.isNull()) {
setPixmap(
QPixmap::fromImage(m_UnscaledImage).scaled(event->size(), Qt::KeepAspectRatio));
}
}
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