importing C++ objects in QML, import PackageName VersionNumber not working

Hi,


What I am trying to do here is create a communication from the QML front end to the C++ backend.

I have a class in C++ named Dialpad with corresponding .h and .c files you can see here:

Code:

---

#ifndef DIALPAD_H
#define DIALPAD_H
 
#include <QObject>
 
class Dialpad : public QObject
{
    Q_OBJECT
public:
    explicit Dialpad(QObject *parent = 0);
 
 
signals:
    void dialSignal(const QString &inNumberToDial);
public slots:
    void dialSlot(const QString &inNumberToDial);
 
 
};
 
#endif // DIALPAD_H
 
#include "dialpad.h"
#include <QDebug>
 
Dialpad::Dialpad(QObject *parent) : QObject(parent)
{
 
 
}
 
 
 
/**
  Name: dialSlot().
  Description: this function is called from QML front end and sends the number to be dialed.
  It will then emit the number to any functions who may need to number.
  @param inNumberToDial this is the number that will be dialed
  @return void
  */
void Dialpad::dialSlot(const QString &inNumberToDial)
{
 
    qDebug() << "Number recieved from QML frontend: " << inNumberToDial << endl;
    emit dialSignal(inNumberToDial);
 
}

---

I have a main.cpp that is doing the following:

Code:

---

#include <QtGui/QApplication>
 
#include <QDeclarativeView>
#include <QDeclarativeContext>
#include <QDebug>
#include <QList>
 
#include <QDeclarativeEngine>
#include <QDeclarativeComponent>
#include <QGraphicsDropShadowEffect>
 
#include "callinfo/callsonholdmodel.h"
#include "dialpad/dialpad.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
 
     qmlRegisterType<Dialpad>("DialpadPkg", 1, 0, "aDialpad");
 
 
    QDeclarativeView view;
    QDeclarativeContext *ctxt = view.rootContext();
    //ignore the setContext, this was for something else
    ctxt->setContextProperty("callsonholdModel", QVariant::fromValue(callsonholdList));
 
    view.setSource(QUrl("qrc:qml/background.qml"));
    view.show();
 
 
    return a.exec();
}

---

Now when I try to import the object DialpadPkg so I can use aDialpad item to send a message from QML to C++ with the aDialpad.dialSlot("12345"); it says aDialpad is not a type, and it also says it can't import DialpadPkg 1.0


here is the background.qml

Code:

---

import Qt 4.7
import "Dialpad"
import "callinfo"
import "buttontray"
import "calendar"
import DialpadPkg 1.0   //doesn't work
 
 
 
 
Rectangle {
 
 
//doesn't work
    aDialpad
    {
        id: interfaceDialpad
 
        //interfaceDialpad.dialSlot("12345")
 
    }
...
...

---

The directory stucture is the following:
MainProject/main.cpp
background.qml

MainProject/Dialpad/dialpad.cpp
dialpad.h


Any ideas?

Thanks

never mind this post - something weird happened when editing.:p

qmlRegisterType only registers the type in qml so that you can operate on its instances. It doesn't create a module, so you can't say "import DialpadPkg" in your code.

How would I create an instance of it in QML so i can send info from QML to C++ what would I need to do if its not import? I already have a model that is sending information to QML to updating the QML but I need QML now to send info to C++. Such as pressing a button on QML I need it to send a string down to C++ end so I can do further processing.

Thanks

I got it to work but not sure if its the right way of doing it:

Code:

---

QDeclarativeView view;
    QDeclarativeContext *ctxt = view.rootContext();
    ctxt->setContextProperty("myDialpad", new Dialpad());

---

I have a C++ class called Dialpad and you can access the object by refering to myDialpad in the QML code. So to send say a string to the C++ backend you would write the following in QML

myDialpad.dialSlot(dialArea.text)

Well, that's the way I did it first, too. You can also declare your signal&slot as Q_PROPERTY() for your C++ QObject. If you define the READ and WRITE and NOTIFY methods for the Q_PROPERTY, you can then treat it as a "normal" object in QML. So write in C++ class declaration something like

Code:

---

Q_PROPERTY(QString numberToDial READ getNumberToDial WRITE dialSlot NOTIFY dialSlignal)

---

then you can write in QML:

Code:

---

myDialpad.numberToDial = "12345"

---