How to know if qmlRegisterType worked?

Qnoobish

Hello,

Currently I am having a bad time trying to register a C++ class as a new type to the QML system.

This is my code:
@
qmlRegisterType<ItemsFilter>("backEndComponents", 1,0, "ItemsFilter");
qmlRegisterType<SelectionRecovery>("backEndComponents", 1,0, "SelectionRecovery");

QQuickView *poView = new QQuickView;
poView->setSource(QUrl::fromLocalFile("pkg/visufrwk/pkg/plugins/adapt/dummy.qml"));

QMainWindow *poMainWindow = new QMainWindow(this);
QWidget *poWidget = new QWidget(poMainWindow);
poWidget = QWidget::createWindowContainer(poView);
poMainWindow->setCentralWidget(poWidget);

poMainWindow->show();

@

Every time I try to load my QML I get the error that the module "backEndComponents" is not installed.

So how could I know if qmlRegisterType was successful? All I know from that function is that it returns with a type ID.

I wonder what could be wrong in my approach?

t3685

Did you import your module in your QML file?

Qnoobish

Yes. In the file dummy.qml, I imported the "backEndComponents" like this:

@
import QtQuick 2.1
import backEndComponents 1.0

Rectangle{
color: "blue"
width: 100
height:100
}
@

If I comment the line with the import to "backEndComponents" I could see my blue Rectangle, if not I get the "module not installed" error.

So, I am not sure what I am missing.

nando76

Hi,
i use it like this:

main.cpp:
@
qmlRegisterType<MyData> ("de.mycompany.qmlcomponents", 1, 0, "MyData");
QtQuick2ApplicationViewer viewer;
QQmlContext *ctxt = viewer.rootContext();

viewer.setSource(QUrl("qrc:/resources/qml/main.qml"));
viewer.showExpanded();
@

and then in qml file:
@
import de.mycompany.qmlcomponents 1.0
@

Hope it helps,
Nando

t3685

That should do the trick normally. Probably something else going on. I don't think qmlRegisterType ever fails.

Qnoobish

Hello,

I think I found the error. I tested my code with Qt 5.2.1 and it didn't work. So I decided to use another version of Qt that I have installed in my PC, Qt 5.1.0, and it worked.
So now at least I know my code is working and the problem resides somewhere else among my installation. Maybe I have a corrupted library that is causing this error.