zoomer using two left clicks on touchscreen

[bkeeney]

I've got a zoomer running really nicely on my desktop, but when I load it on our instrument touchscreen it behaves horribly, because the touchscreen mouse stutters and the zoom rectangle given to the zoomer is incorrect. I figure the easiest way around this is to change the click and drag behavior of the picker to a click (top left) and click(bottom right) behavior. It seemed from the documentation like that might be possible, but I'm enough of a newbie to not really know how to go. Any ideas would be very much appreciated.

Thanks,
Brian

[Uwe]

zoomer->setStateMachine( new QwtPickerClickRectMachine() );

zoomer->setStateMachine( new QwtPickerClickRectMachine() );

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Uwe