plasma-framework/tests/components/textfield3.qml

import QtQuick 2.0
import QtQuick.Layouts 1.12
import org.kde.plasma.core 2.0 as PlasmaCore
import org.kde.plasma.components 3.0 as PlasmaComponents

ComponentBase {
    id: root
    title: "Plasma Components 3 TextField"
    property string longText: "This is a longer sentence"

    contentItem: Flow {
        spacing: PlasmaCore.Units.gridUnit

        PlasmaComponents.TextField {
            placeholderText: longText
        }

        PlasmaComponents.TextField {
            text: root.longText
        }

        PlasmaComponents.TextField {
            width: 400
            placeholderText: longText
        }

        PlasmaComponents.TextField {
            text: root.longText
            echoMode: TextInput.Password
        }
    }
}