How do I get my JS running?

Immii

I am trying to execute my JS when ever any signal is emiited from Qt code. I am using QgraphicsWebview, but I am unable to figure out how can I do this. I have QPushbutton signal connected in my JS but when I click button my JS function does not get called. I am sure I am missing something in the code but can not figure out, can any one please point me to some document or example?

dangelog

The official documentation is http://doc.qt.nokia.com/4.7/qtwebkit-bridge.html . If it still doesn't work, can you paste a small, compilable example that does not work?

Immii

Ah I did not know about addToJavaScriptWindowObject(), it is not mentioned in GraphicsWebView doc (atleast I could not see that) I was expecting it to work similar to QWebView which is running fine.
Let me try to do it the way this documentation says.
I will comeback again if it does not. Hopefully It will solve the problem:)

Immii

I added addToJavaScriptWindowObject() function hoping that I will get my signals in the JS but it is not working :(
I did mainFrame()->addToJavaScriptWindowObject("mywidget",ObjName);
and in my htm, i m calling mywidget.mysignal.connect(this,myJSFunction);
But it is not calling myJSFunction(), I can see if I call slot of my object it works,
mywidget.updateSlot(), I can see my debug is being printed there but signal which is being emiited from constructor is not connecting.

Immii

Here is my example:
@
#include <QtGui>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QGraphicsWebView>
#include<QWebFrame>

class GrphWidget : public QGraphicsWidget
{
Q_OBJECT;
public:
GrphWidget();
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
public slots:
void GrphWidgetSlot();

signals:
void paintSignal();
void paintSignal2();
};

GrphWidget::GrphWidget()
:QGraphicsWidget()
{
emit paintSignal();
}

void GrphWidget::GrphWidgetSlot()
{
emit paintSignal2();
// emit mySignal2();
}

void GrphWidget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
painter->fillRect(boundingRect(), QColor(10,200,100));
QGraphicsWidget::paint(painter, option, widget);
}
class MyWebPage : public QWebPage
{
Q_OBJECT;
public:
MyWebPage(QObject * parent = 0);
protected:
QObject * createPlugin(const QString & classid,const QUrl & url, const QStringList & var,const QStringList & values);
};

MyWebPage::MyWebPage(QObject * parent)
: QWebPage(parent)
{}

QObject * MyWebPage::createPlugin(const QString & classid,const QUrl & url,const QStringList & var,const QStringList & values)
{
if (classid == "Object")
{
qDebug()<<" MyWebPage::createPlugin called";
GrphWidget *myobj = new GrphWidget;
QString name = values.at(var.indexOf("name"));
mainFrame()->addToJavaScriptWindowObject(name,myobj);
return myobj;
}
else
{
return NULL;
}
}
#include"main.moc"
int main(int argc, char *argv)
{
QApplication app(argc, argv);
QUrl url("index.html");
QGraphicsScene myscene = new QGraphicsScene(0, 0, 600, 400);
QGraphicsWebView myview;
myview.setGeometry(QRectF(0, 0, 600, 400));
myscene->addItem(&myview);
QGraphicsView view(myscene);
MyWebPage webPage(&myview);
myview.setPage(&webPage);
myview.settings()->setAttribute(QWebSettings::PluginsEnabled, TRUE);
webPage.setViewportSize(QSize(600,400));
myview.load(url);
view.show();
return app.exec();

}
@

my JS file:

@
<html>
<head>
[removed]
function mySignalFunction()
{
alert("I got my signal");
}
[removed]
</head>
<body style="background-color:LightSkyBlue">
If singals are connected then it should show my message box.
<br>
<object type="application/x-qt-plugin" classid="Object" name="myObject" height="40"
width="100">
</object>

[removed]
myObject.GrphWidgetSlot();
myObject.mySignal.connect(this, mySignalFunction);
myObject2.mySignal2.connect(this, mySignalFunction);

[removed]
</body>
</html>
@

giesbert

Hi Immii,
if you paste code, please surround it with @. Then it is displayed as code. You also find buttons over the edit area to insert these tags. I did it for your last post. Thanks.

Immii

Thank you Gerolf, I am very very new to this, today only I joined this Network, I did not know how to paste the code. Thank you for doing this for me.

giesbert

Your welcome, an welcome on DevNet. I hope, you enjoy it and find the answers, you are searching.

Immii

Finally I got it working. Looks like signals slots were not being initialized properly. I put One alert in JS and every thing worked. So finally I did my connection at the end when loading of the page was done, so I added onload=myfunction() in body element and put all my connection there and every thing worked.

How do I get my JS running?

} @

}
@