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"));
if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
QQuickStyle::setStyle(QStringLiteral("org.kde.desktop"));
}
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
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)
target_sources(helloworld PRIVATE
main.cpp
resources.qrc
)
target_link_libraries(helloworld
Qt${QT_MAJOR_VERSION}::Quick
Qt${QT_MAJOR_VERSION}::Qml
Qt${QT_MAJOR_VERSION}::Gui
Qt${QT_MAJOR_VERSION}::QuickControls2
Qt${QT_MAJOR_VERSION}::Widgets
KF${QT_MAJOR_VERSION}::Kirigami2
KF${QT_MAJOR_VERSION}::I18n
KF${QT_MAJOR_VERSION}::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
