Re: How to get key information from qt terminal to gnuplot

[Tatsuro M. <tma...@ya...>]

----- Original Message -----

> From: sfeam 
> To: gnuplot-beta Tatsuro MATSUOKA>
> Date: 2014/6/24, Tue 13:12
> Subject: Re: How to get key information from qt terminal to gnuplot
> 
> On Tuesday, 24 June 2014 12:15:07 PM Tatsuro MATSUOKA wrote:
> 
>>  > It partially work. Key input reflected in the plot window.
>>  > However, <del>, <bs> and <esc> work but <tab> 
> does not 
>>  > work.
> 
> The <tab> key is not normally available to Qt apps, with some exceptions
> like text-entry widgets.  It is trapped by the Qt top layer and normally
> interpreted as a request to switch focus to the next Qt widget.
> I suppose this made sense when Qt was mostly being
> used as a phone O/S but it's really annoying on the desktop.
> The closest I could find to a clue how to work around this was this
> thread:
>   
> http://stackoverflow.com/questions/18160051/intercepting-tab-key-press-to-manage-focus-switching-manually
> 
> I did not try to add this to gnuplot, however, so I don't
> know whether it would work for us or not.
> 
>     Ethan

Thank you for the pointer.

According to the first answer on the web page above, I added

    QWidget::setFocusPolicy( Qt::NoFocus); //trial
to the top of void QtGnuplotScene::keyPressEvent(QKeyEvent* event) 
in QtGnuplotWidget.cpp.

I have met the error:

QtGnuplotScene.cpp:881:38: error: cannot call member function 'void QWidget::setFocusPolicy(Qt::FocusPolicy)' without object

I do not have enough knowldege for C++ so that I cannot understand what the error message means.
I should make a mistake but I cannot find out what am I wrong.

Sorry for my ignorance for this matter.

Tatsuro