Created
April 27, 2021 12:01
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Create C++ type via QQmlComponent and createWithInitialProperties
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#include <QGuiApplication> | |
#include <QQmlApplicationEngine> | |
#include <QQmlComponent> | |
class Bean : public QObject | |
{ | |
Q_OBJECT | |
Q_PROPERTY(qreal roundness READ roundness WRITE setRoundness NOTIFY roundnessChanged) | |
Q_PROPERTY(QStringList sprouts READ sprouts WRITE setSprouts NOTIFY sproutsChanged) | |
public: | |
qreal roundness() const | |
{ | |
return mRoundness; | |
} | |
void setRoundness(qreal roundness) | |
{ | |
qDebug() << "setRoundness called with" << roundness; | |
if (roundness == mRoundness) | |
return; | |
mRoundness = roundness; | |
emit roundnessChanged(); | |
} | |
QStringList sprouts() const | |
{ | |
return mSprouts; | |
} | |
void setSprouts(const QStringList &sprouts) | |
{ | |
qDebug() << "setSprouts called with" << sprouts; | |
if (sprouts == mSprouts) | |
return; | |
mSprouts = sprouts; | |
emit sproutsChanged(); | |
} | |
signals: | |
void roundnessChanged(); | |
void sproutsChanged(); | |
private: | |
qreal mRoundness = 0.0; | |
QStringList mSprouts; | |
}; | |
int main(int argc, char *argv[]) | |
{ | |
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0) | |
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); | |
#endif | |
QGuiApplication app(argc, argv); | |
QQmlApplicationEngine engine; | |
qmlRegisterType<Bean>("App", 1, 0, "Bean"); | |
QQmlComponent component(&engine); | |
component.setData("import App 1.0; Bean {}", QUrl()); | |
const QStringList sprouts = { "Little Sprout", "Big Sprout" }; | |
Bean *bean = qobject_cast<Bean*>(component.createWithInitialProperties({ | |
{ "roundness", 1.0 }, | |
{ "sprouts", sprouts } | |
})); | |
if (!bean) { | |
qWarning().noquote() << component.errorString(); | |
return 1; | |
} | |
qDebug() << bean->roundness() << bean->sprouts(); | |
return app.exec(); | |
} | |
#include "main.moc" |
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