PlaceAttribute QML Type

The PlaceAttribute type holds generic place attribute information.

This type was introduced in QtLocation 5.5.

Article lu fois.

L'auteur

The Qt Company Ltd.

L'article

Publié le 27 décembre 2024 - Mis à jour le 27 décembre 2024

Liens sociaux

PlaceAttribute QML Type▲

Import Statement: import QtLocation 5.12
Since: QtLocation 5.5
Group: PlaceAttribute is part of qml-QtLocation5-places, qml-QtLocation5-places-data

Detailed Description▲

A place attribute stores an additional piece of information about a Place that is not otherwise exposed through the Place type. A PlaceAttribute is a textual piece of data, accessible through the text property, and a label. Both the text and label properties are intended to be displayed to the user. PlaceAttributes are stored in an ExtendedAttributes map with a unique key.

The following example shows how to display all attributes in a list:

Sélectionnez

import QtQuick 2.0
import QtPositioning 5.5
import QtLocation 5.6

ListView {
    model: place.extendedAttributes.keys()
    delegate: Text {
        text: "&lt;b&gt;" + place.extendedAttributes[modelData].label + ": &lt;/b&gt;" +
              place.extendedAttributes[modelData].text
    }
}

The following example shows how to assign and modify an attribute:

Sélectionnez

    //assign a new attribute to a place
    var smokingAttrib = Qt.createQmlObject('import QtLocation 5.3; PlaceAttribute {}', place);
    smokingAttrib.label = "Smoking Allowed"
    smokingAttrib.text = "No"
    place.extendedAttributes.smoking = smokingAttrib;

    //modify an existing attribute
    place.extendedAttributes.smoking.text = "Yes"

Property Documentation▲

attribute : QPlaceAttribute▲

For details on how to use this property to interface between C++ and QML see "Interfaces between C++ and QML Code".

label : string▲

This property holds the attribute label which is a user visible string describing the attribute.

text : string▲

This property holds the attribute text which can be used to show additional information about the place.

Vous avez aimé ce tutoriel ? Alors partagez-le en cliquant sur les boutons suivants :