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qtvariablesstylesheet

how to use a variable that contains a file path in qt StyleSheet

any way to use a qstring variable that contains a file path in stylesheet like that for example

connect(ui->comboBox, SIGNAL(currentIndexChanged(QString)),
ui->listWidget ,SLOT(setStyleSheet("border-image: url("QString");")));
Solution

  • I guess you have access to Qt 5 and C++11, then you can use a lambda Slot, but since QComboBox::currentIndexChanged is overloaded it gets a little complicated to use the QString overload.

    Try this, I used the QString::arg method to build your CSS string, that is usually more readable then simple string concatenation. It simply replaces %1 with the first argument.

    connect(comboBox, QOverload<const QString &>::of(&QComboBox::currentIndexChanged),
    [=](const QString &imagePath) { 
        ui->listWidget->setStyleSheet(QString("border-image: url(\"%1\");").arg(imagePath));
});