Registering an Enumeration through a Plugin

Gary_

XmlListModel has the ability to access it's enumeration values for Status in QML (Qt Quick).

@
if (status == XmlListModel.Ready) {
// do something
}
@

I would like my class to expose it's enumerated values as well. The following QML does not work:

@
if (status == MyModel.Ready) { // ERROR (ReferenceError: Can't find variable: MyModel)
// do something
}

if (status == XmlListModel.Ready) { // SUCCESS (My enum values match XmlListModel's enums)
// do something
}

if (status == 1) { // SUCCESS (Just making sure my plugin works and it isn't a red herring)
// do something
}
@

I get the following error: ReferenceError: Can't find variable: MyModel.

MyModel.h

@
class MyModel : public QAbstractListModel
{
Q_Object
Q_PROPERTY(Status status READ getStatus NOTIFY statusChanged);

public:
Q_ENUMS(Status)
enum Status { Null, Ready, Loading, Error };
Status getStatus() const;

private:
Status _status;

signals:
void statusChanged(MyModel::Status);

...

}
@

MyPlugin.cpp

@
void Plugin::registerTypes(const char *uri)
{
qmlRegisterType<MyModel>(uri, 1, 0, "MyModel");
}

Q_EXPORT_PLUGIN2(MyPlugin, MyPugin)
@

mbrasser

This sounds like a bug. Are you using an import statement for your plugin (e.g. "import MyPlugin 1.0" or "import MyPlugin 1.0 as MyPlugin")?

Gary_

I am not using import statement. I am using qmldir and it resides in the same directory as the main qml file.

mbrasser

Okay. This seems to work fine in the non-plugin case, and I suspect it would work correctly for plugins with an explicit import statement as well. Could you please add a bug report for this using the "tracker":http://bugreports.qt.nokia.com?

Schneidi

I have a problem similar to this topic except the use of the plugin.

I build an qml interface to share signals and information between my c++ and qml layer.

It works fine but I can't provide my enums to qml. I already saw an example to this topic but I miss some informations.

Could you show me an Example of how to providing an enum to qml ?

Thanks

thorbjorn

@Schneidi

Did you try the code posted by Gary_? That is the correct way to expose an enum to QML as far as I know, which has worked for me both with and without using a plugin.

(though his Q_OBJECT macro is wrongly written as Q_Object)

Schneidi

Hi Thorbjørn

sorry had some other issues to solve.
I already tried it this way but I don't know how to implement the READ method
in this case the

Status getStatus() const;

Do you have a complete example for this ?

Gary_

Sorry for not updating till now. I was able to resolve this issue.

First, I had to change the registration function to:

@
void Plugin::registerTypes(const char *uri)
{
qmlRegisterType<MyModel>("MyPlugin", 1, 0, "MyModel");
}

Q_EXPORT_PLUGIN2(MyPlugin, MyPugin)
@

Then included:

@
import MyPlugin 1.0
@

Without any additional changes, the Enumeration was visible to QML.

thorbjorn

Hmm, you shouldn't do that change to qmlRegisterType though, and it's strange that it would fix your issue. Did you have a look at the value of "uri"?