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#include "previewfiledialog.h"
#include <QGridLayout>
PreviewFileDialog::PreviewFileDialog(QWidget *parent, const QString &caption, const QString &directory,
const QString &filter, int previewWidth) :
QFileDialog(parent, caption, directory, filter)
{
QGridLayout *layout = (QGridLayout *)this->layout();
if (!layout) {
// this QFileDialog is a native one (Windows/KDE/...) and doesn't need to be extended with preview
return;
}
setObjectName("PreviewFileDialog");
QVBoxLayout *box = new QVBoxLayout();
mpPreview = new QLabel(tr("Preview"), this);
mpPreview->setAlignment(Qt::AlignCenter);
mpPreview->setObjectName("labelPreview");
mpPreview->setMinimumWidth(previewWidth);
mpPreview->setMinimumHeight(height());
setMinimumWidth(width() + previewWidth);
box->addWidget(mpPreview);
box->addStretch();
// add to QFileDialog layout
layout->addLayout(box, 1, 3, 3, 1);
connect(this, SIGNAL(currentChanged(const QString &)), this, SLOT(onCurrentChanged(const QString &)));
}
void PreviewFileDialog::onCurrentChanged(const QString &path)
{
QPixmap pixmap = QPixmap(path);
if (pixmap.isNull()) {
mpPreview->setText(tr("Not an image"));
} else {
mpPreview->setPixmap(
pixmap.scaled(mpPreview->width(), height(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
}
}
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