Avoiding Truncated Labels

[ChrisW67]

G'day Uwe,

Thanks for your reply. Resizing the window does not alter the x scale: the truncated labels stay truncated. I cannot see any operative part of the cpuplot example that affects this; as you say, it seems to be the default behaviour.

I have attached the full source If you'd like to look (and forgive the blatant plagiarism ).

Regards,
Chris

Edit: Had a bit more of a play with this. If I explicitly set

plot.setAxisScale(QwtPlot::xBottom, -100, 1);

plot.setAxisScale(QwtPlot::xBottom, -100, 1);

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in the code attached then the label is good. If, as in my broken example, you leave this out (auto scale) the label is truncated. I can probably live with this in the intended application.

[Uwe]

The layout engine of QwtPlot assumes, that the first major tick is at the left and the last one is at the right side of the scale. But in your code its the other way round.

I will think about how to fix this bug in Qwt ( manually generated ticks need to be ordered, after they have been passed with setScaleDiv).

In the meantime you could simply turn the order of your ticks.

Uwe

[ChrisW67]

Thanks Uwe. In rolling the code into a real application I had rewritten it the other way around anyway.

I would not bother handling the tick marks in reverse order, just document that they should be left-to-right or bottom-to-top.

[Uwe]

Even better than documenting a bug is to fix it. ( Done in the 5.2 and trunk branches. )

Uwe