[英]Class extending QObject constructor "is private within this context"
I am trying to make a class extending QObject that contains a list of another class extending QObject.我正在尝试创建一个扩展 QObject 的类,其中包含一个扩展 QObject 的另一个类的列表。 On construction of the list object, I am passing an object into the constructor containing all the points I need to construct my objects.
在构建列表对象时,我将一个对象传递给包含构建对象所需的所有点的构造函数。 However, I am having a problem with my constructors somehow being marked as private.
但是,我的构造函数以某种方式被标记为私有时遇到了问题。
//PDFOutline.h
public:
Q_OBJECT
Q_PROPERTY( QString name READ name CONSTANT )
PDFOutlineItem( Poppler::OutlineItem outline, QObject* parent = nullptr );
PDFOutlineItem( QObject* parent = nullptr);
QString name() { return m_text; }
private:
//QList<PDFOutlineItem> m_children;
int m_page;
QString m_text;
};
class PDFOutline : public QObject
{
public:
Q_OBJECT
PDFOutline( QVector<Poppler::OutlineItem> outline, QObject* parent = nullptr );
PDFOutline( QObject* parent = nullptr );
//QList<PDFOutlineItem> getOutline() { return m_outline; }
private:
QList<PDFOutlineItem*> m_outline;
};
//PDFOutline.cpp
PDFOutline::PDFOutline( QVector<Poppler::OutlineItem> outline, QObject* parent )
: QObject( parent )
{
for( auto item : outline )
{
m_outline.append( new PDFOutlineItem( item, this ) ); //This is the line throwing the error
}
}
PDFOutline::PDFOutline( QObject* parent )
: QObject( parent )
{
}
PDFOutlineItem::PDFOutlineItem( Poppler::OutlineItem outlineItem, QObject* parent )
: QObject( parent ),
m_page( outlineItem.destination()->pageNumber() ),
m_text( outlineItem.name() )
{
}
PDFOutlineItem::PDFOutlineItem( QObject* parent )
: QObject( parent )
{
}
The output error is the following:输出错误如下:
In file included from TechnicalPublications/PDFOutline.cpp:1:0:
TechnicalPublications/PDFOutline.h: In constructor 'TechnicalPublications::PDFOutline::PDFOutline(QVector<Poppler::OutlineItem>, QObject*)':
TechnicalPublications/PDFOutline.h:17:2: error: 'TechnicalPublications::PDFOutlineItem::PDFOutlineItem(Poppler::OutlineItem, QObject*)' is private
PDFOutlineItem( Poppler::OutlineItem outline, QObject* parent = nullptr );
^
TechnicalPublications/PDFOutline.cpp:13:52: error: within this context
m_outline.append( new PDFOutlineItem( item, this ) );
^
Hopefully I am missing something silly, but is this even possible?希望我错过了一些愚蠢的东西,但这可能吗? My goal is to use this in QML to populate a ListView, but i cant seem to get past this isssue.
我的目标是在 QML 中使用它来填充 ListView,但我似乎无法解决这个问题。
Any thoughts?有什么想法吗?
The problem is where you're putting Q_OBJECT
.问题是你把
Q_OBJECT
放在哪里。 Here's the definition I have:这是我的定义:
/* qmake ignore Q_OBJECT */
#define Q_OBJECT \
public: \
QT_WARNING_PUSH \
Q_OBJECT_NO_OVERRIDE_WARNING \
static const QMetaObject staticMetaObject; \
virtual const QMetaObject *metaObject() const; \
virtual void *qt_metacast(const char *); \
virtual int qt_metacall(QMetaObject::Call, int, void **); \
QT_TR_FUNCTIONS \
private: \
Q_OBJECT_NO_ATTRIBUTES_WARNING \
Q_DECL_HIDDEN_STATIC_METACALL static void qt_static_metacall(QObject *, QMetaObject::Call, int, void **); \
QT_WARNING_POP \
struct QPrivateSignal {}; \
QT_ANNOTATE_CLASS(qt_qobject, "")
Note that it has public:
and private:
access specifiers, anything after a Q_OBJECT will be private.请注意,它具有
public:
和private:
访问说明符,Q_OBJECT 之后的任何内容都将是私有的。 So you need to put it before your public:
所以你需要把它放在你的
public:
面前public:
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