Qt Webkit bridge ActiveQt string - string

Question

See also for part of my issue: String passing from JavaScript to Qt/C++ object
I use this custom WebPage on my WebView (using setPage), the strings are passed in wrongly. When I disable calling setPage, the strings passed correctly.
I have a C++ object (that inherits from QWidget) that displays an activeX on a webpage (using ActiveQt and QWebView). The ActiveX object displays just fine. I've registered the custom type and used the Qt MetaType system to instantiate the HTML object.
If I want to update a property of that C++ object (not the ActiveX) and call from JavaScript, the string gets a wrong translation or so. If I pass in some string, I only get a string of 1 character on my C++ method. Viewing the memory tells me that the whole string is present (formattted as UTF-32).
If I now don't call the custom WebPage that loads the plugin for me (using setPage on QWebView), I don't get the ActiveX - which is expected - and the strings are passed correctly.
I don't quite understand why this doesn't work. Even with setPage called, I'm talking to the C++ object via JavaScript/QtWebKit bridge, not to the ActiveX component.
I'm on Windows 7, 64 bit, using Qt 4.7.4.
Some code (C++):
class Device : public QWidget
{
Q_OBJECT
public:
explicit Device(QWidget* parent = 0);
Device(const Device& other);
Device& operator=(const Device& other);
~Device();
QString name() const;
void setName(QString);
Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
signals:
void nameChanged(QString);
private:
QAxWidget* ax;
};
Q_DECLARE_METATYPE(Device);
Device::Device(QWidget* parent/* = 0*/)
: QWidget(parent)
{
ax = new QAxWidget(this);
ax->setControl("{...}");
}
QString Device::name() const
{
return _name;
}
void Device::setName(QString name)
{
if (_name != name) {
_name = name;
emit nameChanged(name);
}
}
// Needed for ActiveQt objects to work
class MapPage : public QWebPage
{
Q_OBJECT
protected:
QObject* createPlugin(const QString& classId, const QUrl& url, const QStringList& paramNames, const QStringList& paramValues);
public:
MapPage(QObject* parent = 0);
};
// ============================================================================
// Needed for ActiveQt objects to work
MapPage::MapPage(QObject* parent/* = 0*/)
: QWebPage(parent)
{
qRegisterMetaType<Device>();
settings()->setAttribute(QWebSettings::PluginsEnabled, true);
}
QObject* MapPage::createPlugin(const QString& classId, const QUrl& url, const QStringList& paramNames, const QStringList& paramValues)
{
// Create widget using QUiLoader, which means widgets don't need to be registered with meta object system (only for gui objects!).
QUiLoader loader;
QObject* result = 0;//loader.createWidget(classId, view());
// If loading failed, use the Qt Metatype system; expect objects derived from QObject
if (!result) {
//result = static_cast<QWidget*>(QMetaType::construct(QMetaType::type(classId.toLatin1())));
int id = QMetaType::type("Device");
void* classPtr = QMetaType::construct(id);
result = static_cast<QWidget*>(classPtr);
}
return result;
}
and then on my window
qRegisterMetaType<Device>();
mapPage = new MapPage(this);
ui.webView->setPage(mapPage); // Needed for ActiveQt objects to work - makes strings broken
...
ui.webView->setHtml(src);

Answer 1

Narrowed it down to an issue probably related to JavaScript/HTML.
//device.name = 'test'; // works
var str = 'test';
previewCameo.view = str; // works
but when I get the name via a HTML drag-n-drop event (using e.dataTransfer), it fails
var name = e.dataTransfer.getData('name');
alert(name); // shows correct name
device.name = name; // fails <------
device.name = e.dataTransfer.getData('name'); // fails <------
So retrieval of the dataTransfer data fails for some reason. Why?
On Linux I do get a string back, but its formatted like t[]e[]s[]t[]. Seems like an encoding issue.