Re: Draw text on top of both canvas and plot background?

[Elvis S. <elv...@or...>]

Den tis 12 mars 2019 kl 09:09 skrev Uwe Rathmann <Uwe...@ti...>:
>
> Hi Elvis,
>
> > Hope that makes it more clear.
>
> That doesn't answer my question, but maybe all you want to do is:

Hm, I'm confused. Your question was "Where exactly do you want to draw
the extra text", to which I answered

"The desired_result.png image shows where I want to paint the text
"g/t". I added the text with an image editor. It's right below the top
axis, right aligned with its max label."

and attached a picture showing exactly where I want to draw the text.

What more info do you need? :p

Elvis

>
> class YourScaleDraw : public QwtScaleDraw
> {
>      ....
>
>      QwtText label( double value ) const override
>      {
>          auto txt = QLocale().toString( value );
>
>          const auto ticks = scaleDiv().ticks[ QwtScaleDiv::MajorTick ];
>          if ( !ticks.empty() && value == ticks.last() )
>          {
>              txt += "\nUnit";
>          }
>
>          return txt;
>      }
> };
>
> plot->setAxisScaleDraw( QwtPlot::xTop, new YourScaleDraw() );

That will draw the text inside the top axis. I want to draw it below
the top axis, straddling the canvas and plot background, as like my
desired_result.png image shows.

Elvis

>
> Uwe