Problem in MouseMoveEvent

[wysota]

Ur solution too is working and short & elegant

It wasn't my solution. Jpn already told you about it in his second post in this thread.

Can u tell me more on event delegation ?? I saw thru the call stack and came to conclude that...that Qt uses QApplicationPrivate::notify_helper() to properly distrubute the events, and hence its View in the window that receives the events first.

I can, but I doubt I can tell you more than you can read from the docs. In general the mechanism is simmilar to the one present in (for example) MFC - the events are propagated from class to class until one of them marks them as handled. In case of Qt the order is child widget -> its parent -> its parent -> ... -> application object.

but what will ignore do and how will the events propogate further ?? can u throw more light ?

I think I already answered that

Thanks a lot both of u guys...just wondering what took u so long to answer

Your question was answered at the very beginning, you just ignored that answer (instead of ignoring the event).

[aamer4yu]

Your question was answered at the very beginning, you just ignored that answer (instead of ignoring the event).

No, I didnt ignore that... as i said i installed filter on view...and tried all sort of things
i didt knew i had to install them on viewport...

earlier answers were like showing which tool to use... but didnt tell where to use
or may b i was ameatuer in Qt that i didnt understand what they meant

[wysota]

Following the "ignore the event" link in JPN's post would have lead you to the right answer - event propagation.

[aamer4yu]

well i said, I had tried that too... but might be making some mistake somewhere...

neways dont fight... I take my thanks back from u ...
Jpn... double thnks to u

is that fine now wysota :P

[wysota]

is that fine now wysota :P

It's your call.

[ranjithreddykommareddy]

hii....wysota .i am also having same problem with mouse events .now i am getting mouse events fine in QGraphicsscene .but i want to add a push button in form for mouse events to draw rectangle and it is moveble .so how can i proceed ..? can any one have idea...?

[wysota]

hii....wysota .i am also having same problem with mouse events .now i am getting mouse events fine in QGraphicsscene .but i want to add a push button in form for mouse events to draw rectangle and it is moveble .so how can i proceed ..? can any one have idea...?

Show your (relevant) code, please.

[ranjithreddykommareddy]

thanks for reply
bool Widget:: eventFilter(QObject* object, QEvent* event)
{


if (event->type() == QEvent::MouseButtonPress)
{
QMouseEvent* mouse = static_cast<QMouseEvent*>(event);
if (ui->graphicsView->geometry().contains(mouse->pos()))
{
originpos = ui->graphicsView->mapToScene(mouse->pos());
// qDebug() << mouse->pos() << originpos ;
mousepress = true;
}
//statusBar()->showMessage(QString("(%1,%2)").arg(pos.x()).arg(p os.y()));


}
if(mousepress)
{
if (event->type() == QEvent::MouseMove)

{


QMouseEvent* mouse = static_cast<QMouseEvent*>(event);

if (ui->graphicsView->geometry().contains(mouse->pos()))
{
currentpos = ui->graphicsView->mapToScene(mouse->pos());
//qDebug() << mouse->pos() ;



if(!itemToDraw)
{
itemToDraw = new QGraphicsRectItem;

ui->graphicsView->scene()->addItem(itemToDraw);
itemToDraw->setPen(QPen(Qt::black, 1, Qt::SolidLine));


//itemToDraw->setPos(pos);
}
itemToDraw->setRect(originpos.x(),originpos.y(),
currentpos.x()- originpos.x(),
currentpos.y() - originpos.y());



}
//itemToDraw->setFlag(QGraphicsRectItem::ItemIsMovable);
}


}



if(mousepress)
{
if(event->type() == QEvent::MouseButtonRelease )
{
QMouseEvent* mouse = static_cast<QMouseEvent*>(event);
QPointF pos = ui->graphicsView->mapToScene(mouse->pos());
// qDebug() << pos ;
mousepress = false;

}
}



}