Page « À propos »

Informations concernant votre application

Kirigami.AboutPage allows you to have a page that shows the copyright notice of the application together with the list of contributors and some information of which platform it's running on.

First, we are going to edit our main.cpp file from previous tutorials.

main.cpp

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#include <QApplication>
#include <QQmlApplicationEngine>
#include <QtQml>
#include <QUrl>
#include <KAboutData>
#include <KLocalizedContext>
#include <KLocalizedString>

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QApplication app(argc, argv);

    KLocalizedString::setApplicationDomain("helloworld");
    QCoreApplication::setOrganizationName(QStringLiteral("KDE"));
    QCoreApplication::setOrganizationDomain(QStringLiteral("kde.org"));
    QCoreApplication::setApplicationName(QStringLiteral("Hello World"));

    KAboutData aboutData(
        QStringLiteral("helloworld"),
        i18nc("@title", "Hello World"),
        QStringLiteral("1.0"),
        i18n("Hello world application"),
        KAboutLicense::GPL,
        i18n("(c) 2021"));

    aboutData.addAuthor(
        i18nc("@info:credit", "Your name"),
        i18nc("@info:credit", "Author Role"),
        QStringLiteral("your@email.com"),
        QStringLiteral("https://yourwebsite.com"));

    // Set aboutData as information about the app
    KAboutData::setApplicationData(aboutData);

    // Register a singleton that will be accessible from QML.
    qmlRegisterSingletonType(
        "org.kde.example", // How the import statement should look like
        1, 0, // Major and minor versions of the import
        "About", // The name of the QML object
        [](QQmlEngine* engine, QJSEngine *) -> QJSValue {
            // Here we retrieve our aboutData and give it to the QML engine
            // to turn it into a QML type
            return engine->toScriptValue(KAboutData::applicationData());
        }
    );

    // Load an application from a QML file
    QQmlApplicationEngine engine;

    engine.rootContext()->setContextObject(new KLocalizedContext(&engine));
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    if (engine.rootObjects().isEmpty()) {
        return -1;
    }

    return app.exec();
}

In the main.cpp file we include KAboutData , a core KDE frameworks component that lets us store information about our application. This information can then be reused by many other KDE Frameworks components. We instantiate a new aboutData object with its fairly complete default constructor and add author information.

After all the required information has been set, we call KAboutData::setApplicationData to initialize the properties of the QApplication object.

We then create a qmlRegisterSingletonType() . This is used to allow us to import the C++ code as a module in our main.qml with import org.kde.example 1.0.

Its first argument is the URI that will be used for the import, the second and third arguments are major and minor versions respectively, the fourth is the type name, the name that we will call when accessing our About type, and the last is a reference to the C++ object that is exposed to QML. In the latter's case, we use a lambda to instantiate the aboutData of our application in place.

main.qml

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import QtQuick 2.15
import QtQuick.Controls 2.15 as Controls
import QtQuick.Layouts 1.15
import org.kde.kirigami 2.20 as Kirigami

import org.kde.example 1.0

Kirigami.ApplicationWindow {
    id: root

    title: i18nc("@title:window", "Day Kountdown")

    globalDrawer: Kirigami.GlobalDrawer {
        isMenu: true
        actions: [
            Kirigami.Action {
                text: i18n("Quit")
                icon.name: "gtk-quit"
                shortcut: StandardKey.Quit
                onTriggered: Qt.quit()
            },

            Kirigami.Action { // <==== Action to open About page
                text: i18n("About")
                icon.name: "help-about"
                onTriggered: pageStack.layers.push(aboutPage)
            }
        ]
    }

    Component { // <==== Component that instantiates the Kirigami.AboutPage
        id: aboutPage

        Kirigami.AboutPage {
            aboutData: About
        }
    }

    ListModel {
        id: kountdownModel
    }

    AddEditSheet {
        id: addEditSheet
        onAdded: kountdownModel.append({
            "name": name,
            "description": description,
            "date": Date.parse(kdate)
        });
        onEdited: kountdownModel.set(index, {
            "name": name,
            "description": description,
            "date": Date.parse(kdate)
        });
        onRemoved: kountdownModel.remove(index, 1)
    }

    function openPopulatedSheet(mode, index = -1, listName = "", listDesc = "", listDate = "") {
        addEditSheet.mode = mode
        addEditSheet.index = index;
        addEditSheet.name = listName
        addEditSheet.description = listDesc
        addEditSheet.kdate = listDate

        addEditSheet.open()
    }


    pageStack.initialPage: Kirigami.ScrollablePage {
        title: i18nc("@title", "Kountdown")

        actions.main: Kirigami.Action {
            id: addAction
            icon.name: "list-add"
            text: i18nc("@action:button", "Add kountdown")
            onTriggered: openPopulatedSheet("add")
        }

        Kirigami.CardsListView {
            id: layout
            model: kountdownModel
            delegate: KountdownDelegate {}
        }
    }
}

First, we use the import we defined in the main.cpp file, namely org.kde.example. We then add a Kirigami.Action to our global drawer that will send us to the About page, and create a component with a Kirigami.AboutPage in it, which expects a KAboutData::applicationData() object. We exposed precisely that in our main.cpp and called it About, so we can pass it here.

CMakeLists

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cmake_minimum_required(VERSION 3.16)
project(helloworld)

set(KF_MIN_VERSION "5.68.0")
set(QT_MIN_VERSION "5.12.0")

find_package(ECM ${KF_MIN_VERSION} REQUIRED NO_MODULE)

set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})

include(KDEInstallDirs)
include(KDECMakeSettings)
include(KDECompilerSettings NO_POLICY_SCOPE)

find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Core Quick Test Gui QuickControls2 Widgets)
find_package(KF5 ${KF_MIN_VERSION} REQUIRED COMPONENTS Kirigami2 I18n CoreAddons)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_subdirectory(src)

feature_summary(WHAT ALL INCLUDE_QUIET_PACKAGES FATAL_ON_MISSING_REQUIRED_PACKAGES)

In the CMakeLists.txt file in our top-level folder, be sure to have CoreAddons in your find_package() call. It is needed for KAboutData .

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add_executable(helloworld main.cpp resources.qrc)
target_link_libraries(helloworld Qt5::Quick Qt5::Qml Qt5::Gui Qt5::QuickControls2 Qt5::Widgets KF5::Kirigami2 KF5::I18n KF5::CoreAddons)

In the CMakeLists.txt file in the src/ directory, nothing is needed since we instantiated out aboutData in place.

Exécution de l'application

Maintenant, si vous exécutez votre application et déclenchez l'action « A propos » dans le tiroir global, vous devriez voir notre page « A propos ».

! Copie d'écran de la page « A propos » de Kirigami

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