Not use QCustomEvent class in Qt 4.7.4

[phamvanan]

Hi all,
I try use QCustomEvent but
Although,
@#include <QCustomEvent>@
When i use it,
@ QApplication::postEvent(QApplication::instance(), new QCustomEvent(MyEvent));@
I get error:
@error: C2061: syntax error : identifier 'QCustomEvent'@

Thanks.

[raven-worx]

my fault... the link wasn't still up to date.
QCustomEvent is only available if your Qt4 is built with Qt3 support.

For "Qt4":http://qt-project.org/doc/qt-4.7/porting4.html#id-4cb0a3dc-e4b9-45f1-be70-546d53022c96 just leave out the QCustomEvent and keep proceeding.... meaning just send the event directly without wrapping it in a QCustomEvent.
The MyEvent object should be a custom class derived from QEvent. In there set all the data you need.

[phamvanan]

Hi,
In Qt 4.7, Which replace to QCustomEvent?
I have two Objects, one is Copier class, else MainWindow class.
At copier class I want call postEvent function to Mainwindow class with a data. In mainwindow class how to get data event?
Thanks.

[SGaist]

Hi,

In the event filter, check against your event type and then cast it to your class so you can access your data.

[phamvanan]

Hi,
I found a document link about "event and fitter event":http://qt-project.org/doc/qt-4.8/eventsandfilters.html
I see a example fitter event but i don't understand what's MyCustomEventType ?
I created a class MyCustomEvent as below:
@
#include <QEvent>

class MyCustomEvent : public QEvent{
explicit MyCustomEvent(QObject *parent = 0);
public:
qint64 byteCopied;
};
#endif // MYCUSTOMEVENT_H

@
When I postEvent,
@
MyCustomEvent *event;
event->byteCopied = 1204;
QApplication::postEvent(QApplication::instance(), event);
@
How to check type and get my data in eventFilter function.
@
bool MainWindow::eventFilter(QObject *object, QEvent *event){

}
@
Thanks,
An.

[raven-worx]

you will need to register your event type somewhere early in your application ( main() or MainWindow constructor ):

you MyCustomEvent implementation:
@
#include <QEvent>

class MyCustomEvent : public QEvent
{
public:
explicit MyCustomEvent(QObject *parent = 0) : QEvent(MyCustomEvent::customType)
{
}

qint64 byteCopied;
static const QEvent::Type customType;

};
#endif // MYCUSTOMEVENT_H
@

in main.cpp
@
#include "MyCustomEvent.h"

const QEvent::Type MyCustomEvent::customType = static_castQEvent::Type(QEvent::registerEventType());

int main()
{
QApplication app;
...
}
@

in your eventFilter():
@
if( event->type() == MyCustomEvent::customType )
{
...
}
@

[phamvanan]

Thanks for your answer and quickly edit.
An.