Re: qwt plot and scrollbars

[Huseyin K. <hus...@gm...>]

Hi Giacomo,
I am not a professional but I did this before for a measurement and
visualisation.
I remember, there is no way in the library to make this automatically.

I did it like this: derive a QwtPlot, reserve some space for datas, give a
desirable page fragment value and use it to calculate how many page
fragments totaly and how many page fragments will be visible in the
plot.(page fragments : how many number of values will scroll at every scroll
step) Then, make some funtions for these and make one slot which use this
page fragment number to set the datas location that will visible. Finaly,
connect scrollbars valueChanged(int) signal to this slot. Also you should
make some functions to get max page fragment number and set scrollbars max
value.

I hope I could expalin.


Huseyin


On Tue, Mar 10, 2009 at 2:37 PM, Giacomo S. <
gia...@el...> wrote:

> Good morning.
>
> Is there a simple way to make my QwtPlot have the horizontal scrollbar
> automatically shown when the x data vector size reaches a certain value?
>
> For instance, when I have 200 elements in the x axis, I want the plot to
> enable scrolling.
>
> Thanks in advance
>
> Giacomo.
>
>
>
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