QwtLegend problem

Hi everyone,
I have following situation:
I use QwtPlot to plot something and I use QwtLegend to draw legend from it. I made it like this:

mQwtLegend = new QwtLegend(mPlot); // mPlot is QwtPlot*

mPlot->insertLegend(mQwtLegend, *mLegendCurrentPosition);

The thing is I also made a checkbox for the user to decide whether something plotted should be visible or not.
It works as intended, but my legend somehow still shows everything. I tried e.g.

mPlot->updateLegend();

after hiding the plot, unfortunately without results.
From what I read, before newest version it was possible to get access to LegendItem and set visibility manually -> right now it's maintained in a way I don't understand and I cannot make it right.
Could someone please help me with that?
Thanks in advance :).

Quote:

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Originally Posted by mimickxd

The thing is I also made a checkbox for the user to decide whether something plotted should be visible or not.
It works as intended, but my legend somehow still shows everything.

---

You could enable/disable the QwtPlotItem::Legend attribute ?

Uwe

First of all, thanks for fast reply,

with it I managed to solve this issue. Using setItemAttribute was the correct approach, but at the beginning it did nothing (or so I thought). I had to set attribute and then update Legend, step by step, only then it actually ran. If someone in the future is interested, that's the code:

for (auto item : mPlot->itemList())
{

// code here to find intended item

item->setItemAttribute(item->Legend, state); //state is defined as true or false

mPlot->updateLegend();

break;

}

Thank you for your help :).

EDIT:

OK, now I have another problem regarding this issue.

While legend is showing/hiding properly, using solution mentioned above does following thing:
I have signal A (pos. 1) and B (pos. 2) in menu and in legend.
Now I hide A, so A is hidden in menu and in legend, only B is visible.
Then I show A and A is shown again in menu and in legend, but in menu it's on its position while in legend the structure is now B, A (it's reverse).
I assume that

item->setItemAttribute(item->Legend, state);

disables the attribute ergo removes given signal from legend, and showing it means actually "adding it to the legend list".
When I do this with e.g.3 signals, hidden signal, while shown again, goes to the end of the legend.

Am I right here and is there a way to repair that behaviour?

Sorry, it was doubled somehow. Still - does anybody know how to solve issue mentioned in EDIT above :)?