[Qt-interest] Placing waveforms in stripes, examples needed.

[Ross Bencina]

Hi Svenn

I'm not sure this is the best way, but the way I handle it is to use a 
QTableWidget to manage the "channels" (one per waveform) and have a separate 
QWidget for rendering/editing each channel. Use QTableWidget::setCellWidget 
to embed the waveform widgets in the table.

You can get the table to manage the vertical scrolling and channel resizing. 
I manage the horizontal scrolling/zooming using code external to the table 
widget, with a separate horizontal scroll bar.

A good alternative would be to use QGraphicsView and have a separate 
QGraphicsItem for each channel. This might make scrolling/zooming easier.

Ross.


Svenn Are Bjerkem wrote:
> Hi,
>
> Audio sequencers and waveform viewers place visual data in horizontal
> stripes and these stripes are attached to a horizontal scrollbar so
> that the data viewport can be changed. Example is qtractor or kst. I
> downloaded qtractor source to see if I could learn something, but this
> is a complete application and not very easy to use as a reference. I
> tried to google, but qt seems to mean a lot, and stripes happens on
> lcd-panels and waveform is everywhere. If somebody has a URL or two to
> simple panelized waveforms in a graphic view I would be happy to learn
> from them.
>
> I have a list of x and y data where x is time and y is either logical
> 0 or 1, basically I want to write a very simple waveform viewer for
> digital simulation data. I could present the data in vcd and use
> gtkwave, but my needs are a bit different than those offered by
> gtkwave.
>
> -- 
> Kind regards,
> Svenn
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