QLineEdit indicator

[GrahamL]

Hi
I would like to have an indicator associated with a qlineedit to show when a field on a form has been edited.(similar to the clear button functionality)
Has anyone any suggestions as to how this can be done?

Thanks

[TheBadger]

I would suggest to change the stylesheet to perhaps change the color when the user edits the text and clears it when submitted:

    QWidget* myWidget = new QWidget(nullptr);
    QVBoxLayout *vboxLayout = new QVBoxLayout(myWidget);
    QLineEdit* edit = new QLineEdit("Test");
    connect(edit, &QLineEdit::textChanged, [edit]{edit->setStyleSheet("background-color: yellow");});
    QPushButton* submitButton = new QPushButton("Submit");
    connect(submitButton, &QPushButton::clicked, [edit]{edit->setStyleSheet(""); });
    vboxLayout->addWidget(edit);
    vboxLayout->addWidget(submitButton);
    myWidget->show();

The above code is a very simple example to show the idea. But you can update as you need to.

[GrahamL]

Thanks - something to think about

[Chris Kawa]

A less manual solution is to add an action to the line edit using addAction(). Then you can just change the action's icon to indicate the state.

[GrahamL]

@Chris-Kawa
Hi
I have tried this but the icon does not show up

	m_action = new QAction(this);

	QIcon icon(":/cross.png");
	m_action->setIcon(icon);

	ui->nameEdit->addAction(m_action);

[Chris Kawa]

Should be something like:

 QIcon icon(":/cross.png");
 m_action = ui->nameEdit->addAction(icon, QLineEdit::TrailingPosition);

[GrahamL]

Thanks got it now