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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQMLCOMPONENT_H
#define QQMLCOMPONENT_H
#include <QtCore/qvariant.h>
#include <QtCore/qmap.h>
#include <QtQml/qqml.h>
#include <QtQml/qqmlerror.h>
#include <QtCore/qobject.h>
#include <QtCore/qstring.h>
#include <QtQml/qjsvalue.h>
QT_BEGIN_NAMESPACE
class QByteArray;
class QQmlEngine;
class QQmlComponent;
class QQmlIncubator;
class QQmlComponentPrivate;
class QQmlComponentAttached;
namespace QV4 {
class ExecutableCompilationUnit;
}
class Q_QML_EXPORT QQmlComponent : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QQmlComponent)
Q_PROPERTY(qreal progress READ progress NOTIFY progressChanged)
Q_PROPERTY(Status status READ status NOTIFY statusChanged)
Q_PROPERTY(QUrl url READ url CONSTANT)
public:
enum CompilationMode { PreferSynchronous, Asynchronous };
Q_ENUM(CompilationMode)
QQmlComponent(QObject *parent = nullptr);
QQmlComponent(QQmlEngine *, QObject *parent = nullptr);
QQmlComponent(QQmlEngine *, const QString &fileName, QObject *parent = nullptr);
QQmlComponent(QQmlEngine *, const QString &fileName, CompilationMode mode, QObject *parent = nullptr);
QQmlComponent(QQmlEngine *, const QUrl &url, QObject *parent = nullptr);
QQmlComponent(QQmlEngine *, const QUrl &url, CompilationMode mode, QObject *parent = nullptr);
explicit QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, QObject *parent = nullptr);
explicit QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, CompilationMode mode, QObject *parent = nullptr);
~QQmlComponent() override;
enum Status { Null, Ready, Loading, Error };
Q_ENUM(Status)
Status status() const;
bool isNull() const;
bool isReady() const;
bool isError() const;
bool isLoading() const;
bool isBound() const;
QList<QQmlError> errors() const;
Q_INVOKABLE QString errorString() const;
qreal progress() const;
QUrl url() const;
virtual QObject *create(QQmlContext *context = nullptr);
QObject *createWithInitialProperties(const QVariantMap& initialProperties, QQmlContext *context = nullptr);
void setInitialProperties(QObject *component, const QVariantMap &properties);
virtual QObject *beginCreate(QQmlContext *);
virtual void completeCreate();
void create(QQmlIncubator &, QQmlContext *context = nullptr,
QQmlContext *forContext = nullptr);
QQmlContext *creationContext() const;
QQmlEngine *engine() const;
static QQmlComponentAttached *qmlAttachedProperties(QObject *);
public Q_SLOTS:
void loadUrl(const QUrl &url);
void loadUrl(const QUrl &url, CompilationMode mode);
void loadFromModule(QAnyStringView uri, QAnyStringView typeName,
QQmlComponent::CompilationMode mode = PreferSynchronous);
void setData(const QByteArray &, const QUrl &baseUrl);
Q_SIGNALS:
void statusChanged(QQmlComponent::Status);
void progressChanged(qreal);
protected:
QQmlComponent(QQmlComponentPrivate &dd, QObject* parent);
#if QT_DEPRECATED_SINCE(6, 3)
QT_DEPRECATED_X("Use the overload with proper arguments")
Q_INVOKABLE void createObject(QQmlV4FunctionPtr);
#endif
Q_INVOKABLE QObject *createObject(
QObject *parent = nullptr, const QVariantMap &properties = {});
Q_INVOKABLE void incubateObject(QQmlV4FunctionPtr);
private:
QQmlComponent(QQmlEngine *, QV4::ExecutableCompilationUnit *compilationUnit, int,
QObject *parent);
Q_DISABLE_COPY(QQmlComponent)
friend class QQmlTypeData;
friend class QQmlObjectCreator;
};
// Don't do this at home.
namespace QQmlPrivate {
// Generally you cannot use QQmlComponentAttached as attached properties object in derived classes.
// It is private.
template<class T>
struct OverridableAttachedType<T, QQmlComponentAttached>
{
using Type = void;
};
// QQmlComponent itself is allowed to use QQmlComponentAttached, though.
template<>
struct OverridableAttachedType<QQmlComponent, QQmlComponentAttached>
{
using Type = QQmlComponentAttached;
};
} // namespace QQmlPrivate
QT_END_NAMESPACE
#endif // QQMLCOMPONENT_H
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