How to get icon from any file?

AndrzejB

QMimeDatabase mime_database;
QIcon icon;
QList<QMimeType> mime_types = mime_database.mimeTypesForFileName("file.txt");
icon = QIcon::fromTheme(mime_types[0].iconName());
if (icon.isNull())  qDebug() << "null";
qDebug() << mime_types[0].iconName();

1.This above not works (print : null "text-plain")
2.How get icon of Exe file? (not mime but specified for file)

hskoglund

Hi, for 2. there's an example here

AndrzejB

2 works, thanks!
But why 1 icon isNull() ?

Is possible 1 and 2 under Linux? Linux has something like mime or/and Elf binaries can holds icons?

Bad:

QPixmap extractMime(const QString &sourceFile)
{
    QMimeDatabase mime_database;
    const QString nativeName = QDir::toNativeSeparators(sourceFile);   
    QIcon icon;
    QList<QMimeType> mime_types = mime_database.mimeTypesForFileName(nativeName);
    icon = QIcon::fromTheme(mime_types[0].iconName());
    if (icon.isNull())  qDebug() << "null";
    qDebug() << mime_types[0].iconName();
    return icon.pixmap(16);
}

Maybe this work for Linux, but for Windows I need registers. Sample C# application https://www.codeproject.com/Articles/29137/Get-Registered-File-Types-and-Their-Associated-Ico

for example:
Computer\HKEY_CLASSES_ROOT.mp3 has
OpenWithProgIds/WMP11.AssocFile.MP3

Computer\HKEY_CLASSES_ROOT\WMP11.AssocFile.MP3 has DefaultIcon = %SystemRoot%\system32\wmploc.dll,-732
wmploc.dll is resources and 732 index of icon?