[Qt-interest] How to handle the event filter in Qt graphicsview

[Ramesh]

Ya, I do agree but some time we really need event filter to avoid the
unnecessary code block.

Suppose if a view has more than one widget and we need to handle the
keyboard events for all the widgets,
In this situation, overriding the keyboard events for a view doesn't work
and for this we need to override key events for all the child widgets its
cumbersome job.


-----Original Message-----
From: Anders Bakken [mailto:anders.bakken at myriadgroup.com]
Sent: Friday, July 23, 2010 3:34 AM
To: Ross Bencina
Cc: Ramesh; qt-interest at trolltech.com
Subject: Re: [Qt-interest] How to handle the event filter in Qt graphicsview

On Thu, Jul 22, 2010 at 04:21:02PM +0100, Ross Bencina wrote:
> Hi Ramesh
>
> From memory the elastic nodes example has some keyboard event
> handling. Perhaps look at that.
>
> I think the easiest thing would be to override the standard keyboard
> event handlers in a QGraphicsVIew subclass.
>
> Ross.

There's a ton of ways to do it really. You could implement the event
handlers in each item, in the scene, in the view or using an
eventfilter on either the view or the scene.

Most times I'd say it's cleaner to not use an eventfilter and most times
I'd recommend using the event handlers in the items or in the scene
simply because that's likely to be closer to the logic of your app
than the view but these are just my preferences.

--
Anders Bakken

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