Pass Vector of Pointers to QML file

[mandruk1331]

My goal is to pass a vector of pointers to a QML file, where I will be able to get the data(String) from it.

Q_PROPERTY(QVector<Thing*> getThing READ getThing)
and there's also a set and get functions

main.cpp
engine.rootContext()->setContextProperty("ThingOBJ",&ThinOBJ);

[VRonin]

Use QVariantList instead of QVector<Thing*>

[mandruk1331]

But how a QVariantList will store pointers, not the same as other containers?

[VRonin]

if Thing is a QObject, everything is supported natively

[mandruk1331]

@VRonin I just thought about, what if i will create a class for the QVector<Thing*> and provide the functionality like getThat, getData etc. and send an instance of an object to the QML, will that work?

[VRonin]

@mandruk1331 As long as that class is a QObject or Q_GADGET (declared and registered as MetaType) and you declare Q_IVOKABLE, slots and/or Q_PROPERTY it will

[mandruk1331]

@VRonin I created a class and inherited a QObject but how I can pass the data inside of the QVector<QObject*>? can you give a little example?

[VRonin]

class Thing{
public:
Thing(const QString& val = QString() )
: m_foo(val){}
Thing(const Thing& other)=default;
Thing& operator=(const Thing& other)=default;
~Thing() =default;
void setFoo(const QString& val){m_foo=val;}
const QString& foo() const {return m_foo;}
private:
QString m_foo;
};

class ThingsWrapper : public QObject{
Q_OBJECT
Q_PROPERTY(int countThings READ countThings)
Q_DISABLE_COPY(ThingsWrapper)
public:
explicit ThingsWrapper(QObject* parent=Q_NULLPTR)
:QObject(parent){}
virtual ~ThingsWrapper(){
clearThings();
}
int countThings() const { return m_things.size();}
Q_INVOKABLE QString fooAt(int index){
if(index<0 || index>=m_things.size()) return QString();
return m_things.at(index)->foo();
}
public slots:
void addThing(const QString& foo){
m_things.append(new Thing(foo));
}
void removeThing(int index){
if(index<0 || index>=m_things.size()) return;
delete m_things.takeAt(index);
}
void clearThings(){
while(!m_things.isEmpty())
delete m_things.takeLast();
}
private:
QVector<Thing*> m_things;
};

[mandruk1331]

@VRonin at the moment I have a class which inherits from QObject, and inside of that class I have a struct with all the data (QString), and also I have created QVector<StructType*> , the problem is how I can access the data inside of the QVector<StructType*>obj, from QML. Because the inside of C++ I have to use obj.at(0)->StringData, and inside the QML file I can't use an arrow, how am I able to get the data from the Vector inside of the QML?

[VRonin]

do something like I did here:

Q_INVOKABLE QString fooAt(int index){
if(index<0 || index>=m_things.size()) return QString();
return m_things.at(index)->foo();
}

[mandruk1331]

@VRonin the index is getting set only in the function which changes the index number, but when I want to use it in a function like get ThinngData(){return thing.at(index)->Data} the index is the default value(the one which is on the start of the program), is there a way to tell the compiler not to do that?
And I forgot to say that I want to make a list view of the data, in that case I need to create a model?

[VRonin]

@mandruk1331 said in Pass Vector of Pointers to QML file:

is the default value(the one which is on the start of the program)

I did not get this, I'm sorry

@mandruk1331 said in Pass Vector of Pointers to QML file:

I want to make a list view of the data, in that case I need to create a model?

Exactly

[mandruk1331]

This post is deleted!

[mandruk1331]

@VRonin So far I used your approach and create get functions which return the data i need, and I call them inside qml and just pass the index which I need, is that a correct approach?