QImageWriter::supportedMimeTypes() jpeg

samdol

Hi,
In screenShot example,
http://doc.qt.io/qt-5/qtwidgets-desktop-screenshot-example.html

void Screenshot::saveScreenshot()
{
    const QString format = "png";
    QString initialPath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
    if (initialPath.isEmpty())
        initialPath = QDir::currentPath();
    initialPath += tr("/untitled.") + format;

    QFileDialog fileDialog(this, tr("Save As"), initialPath);
    fileDialog.setAcceptMode(QFileDialog::AcceptSave);
    fileDialog.setFileMode(QFileDialog::AnyFile);
    fileDialog.setDirectory(initialPath);
    QStringList mimeTypes;
    foreach (const QByteArray &bf, QImageWriter::supportedMimeTypes())
        mimeTypes.append(QLatin1String(bf));
    fileDialog.setMimeTypeFilters(mimeTypes);
    fileDialog.selectMimeTypeFilter("image/" + format);
    fileDialog.setDefaultSuffix(format);
    if (fileDialog.exec() != QDialog::Accepted)
        return;
    const QString fileName = fileDialog.selectedFiles().first();
    if (!originalPixmap.save(fileName)) {
        QMessageBox::warning(this, tr("Save Error"), tr("The image could not be saved to \"%1\".")
                             .arg(QDir::toNativeSeparators(fileName)));
    }
}

After clicking "Save Screenshot" pushbutton, "Save As"
dialog pops up. In "Files of type" combobox, I see several supported file
formats such as .bmp, .jpeg, .jpg, .png, ...
When I select "PNG image(.png)" comboBox, the "File name" lineEdit shows the file name with the extension changed automatically to myfile.png. but when I select "JPEG image(.jpeg *.jpg *.jpe)", the "File name:" LineEdit shows with the extension changed to myfile.jpeg. I want it to change its extension automatically to myfile.jpg instead of myfile.jpeg.
How can I do this?

SGaist

Hi,

Shot in the dark: remove all other extensions from the jpeg entry.

Hope it helps

samdol

@SGaist
How could I remove them? Do I have to modify the source code of Qt?

SGaist

No, when you populate mimeTypes, check if jpeg appears in the entry and modify it before adding it to mimeTypes.

samdol

@SGaist
I tried it. But it did not work. Instead of supportedMimeTypes(), I decided to use supportedImageFormats() though it demands some extra work. Thanks anyway.

SGaist

You're welcome !

Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)