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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 QQMLINSTANCEMODEL_P_H
#define QQMLINSTANCEMODEL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <private/qtqmlmodelsglobal_p.h>
#include <private/qqmlincubator_p.h>
#include <QtQml/qqml.h>
#include <QtCore/qobject.h>
QT_REQUIRE_CONFIG(qml_object_model);
QT_BEGIN_NAMESPACE
class QObject;
class QQmlChangeSet;
class QAbstractItemModel;
class Q_QMLMODELS_EXPORT QQmlInstanceModel : public QObject
{
Q_OBJECT
Q_PROPERTY(int count READ count NOTIFY countChanged)
QML_ANONYMOUS
QML_ADDED_IN_VERSION(2, 0)
public:
enum ReusableFlag {
NotReusable,
Reusable
};
enum ReleaseFlag { Referenced = 0x01, Destroyed = 0x02, Pooled = 0x04 };
Q_DECLARE_FLAGS(ReleaseFlags, ReleaseFlag)
virtual int count() const = 0;
virtual bool isValid() const = 0;
virtual QObject *object(int index, QQmlIncubator::IncubationMode incubationMode = QQmlIncubator::AsynchronousIfNested) = 0;
virtual ReleaseFlags release(QObject *object, ReusableFlag reusableFlag = NotReusable) = 0;
virtual void cancel(int) {}
QString stringValue(int index, const QString &role) { return variantValue(index, role).toString(); }
virtual QVariant variantValue(int, const QString &) = 0;
virtual void setWatchedRoles(const QList<QByteArray> &roles) = 0;
virtual QQmlIncubator::Status incubationStatus(int index) = 0;
virtual void drainReusableItemsPool(int maxPoolTime) { Q_UNUSED(maxPoolTime); }
virtual int poolSize() { return 0; }
virtual int indexOf(QObject *object, QObject *objectContext) const = 0;
virtual const QAbstractItemModel *abstractItemModel() const { return nullptr; }
virtual bool setRequiredProperty(int index, const QString &name, const QVariant &value);
Q_SIGNALS:
void countChanged();
void modelUpdated(const QQmlChangeSet &changeSet, bool reset);
void createdItem(int index, QObject *object);
void initItem(int index, QObject *object);
void destroyingItem(QObject *object);
Q_REVISION(2, 15) void itemPooled(int index, QObject *object);
Q_REVISION(2, 15) void itemReused(int index, QObject *object);
protected:
QQmlInstanceModel(QObjectPrivate &dd, QObject *parent = nullptr)
: QObject(dd, parent) {}
private:
Q_DISABLE_COPY(QQmlInstanceModel)
};
class QQmlObjectModelAttached;
class QQmlObjectModelPrivate;
class Q_QMLMODELS_EXPORT QQmlObjectModel : public QQmlInstanceModel
{
Q_OBJECT
Q_DECLARE_PRIVATE(QQmlObjectModel)
Q_PROPERTY(QQmlListProperty<QObject> children READ children NOTIFY childrenChanged DESIGNABLE false)
Q_CLASSINFO("DefaultProperty", "children")
QML_NAMED_ELEMENT(ObjectModel)
QML_ADDED_IN_VERSION(2, 1)
QML_ATTACHED(QQmlObjectModelAttached)
public:
QQmlObjectModel(QObject *parent=nullptr);
~QQmlObjectModel() {}
int count() const override;
bool isValid() const override;
QObject *object(int index, QQmlIncubator::IncubationMode incubationMode = QQmlIncubator::AsynchronousIfNested) override;
ReleaseFlags release(QObject *object, ReusableFlag reusable = NotReusable) override;
QVariant variantValue(int index, const QString &role) override;
void setWatchedRoles(const QList<QByteArray> &) override {}
QQmlIncubator::Status incubationStatus(int index) override;
int indexOf(QObject *object, QObject *objectContext) const override;
QQmlListProperty<QObject> children();
static QQmlObjectModelAttached *qmlAttachedProperties(QObject *obj);
Q_REVISION(2, 3) Q_INVOKABLE QObject *get(int index) const;
Q_REVISION(2, 3) Q_INVOKABLE void append(QObject *object);
Q_REVISION(2, 3) Q_INVOKABLE void insert(int index, QObject *object);
Q_REVISION(2, 3) Q_INVOKABLE void move(int from, int to, int n = 1);
Q_REVISION(2, 3) Q_INVOKABLE void remove(int index, int n = 1);
public Q_SLOTS:
Q_REVISION(2, 3) void clear();
Q_SIGNALS:
void childrenChanged();
private:
Q_DISABLE_COPY(QQmlObjectModel)
};
class QQmlObjectModelAttached : public QObject
{
Q_OBJECT
public:
QQmlObjectModelAttached(QObject *parent)
: QObject(parent), m_index(-1) {}
~QQmlObjectModelAttached() {
attachedProperties.remove(parent());
}
Q_PROPERTY(int index READ index NOTIFY indexChanged FINAL)
int index() const { return m_index; }
void setIndex(int idx) {
if (m_index != idx) {
m_index = idx;
Q_EMIT indexChanged();
}
}
static QQmlObjectModelAttached *properties(QObject *obj) {
QQmlObjectModelAttached *rv = attachedProperties.value(obj);
if (!rv) {
rv = new QQmlObjectModelAttached(obj);
attachedProperties.insert(obj, rv);
}
return rv;
}
Q_SIGNALS:
void indexChanged();
public:
int m_index;
static QHash<QObject*, QQmlObjectModelAttached*> attachedProperties;
};
QT_END_NAMESPACE
#endif // QQMLINSTANCEMODEL_P_H
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