Turn off legend entires?

Hello, I have an array of line handle objects, and each has a display name. My array is populated similar to this:

hline = [];
hline(1) = line(x1, y1);
set(hline(1), 'DisplayName', 'Line #1');
...
hlegend = legend(hline);

I have many of these line objects all plotted on the same axis, and what I have written is the ability to toggle any of the line objects visibility on or off. What I am trying to do is when I hide a line object, I also want to to remove it from the legend display. I have tried setting the IconDiplsayStyle property to "off" like so:

set(get(get(hline(i),'Annotation'),'LegendInformation',),...
    'IconDisplayStyle','off');
legend

This does NOT work however... it simply adds all the objects in the array hline to the legend regardless of what their IconDisplayProperty value is set to. If I give legend an array of strings, then it will hide those objects with IconDisplayValue off, but this is not desireable because I want the correct name for each line object to be stored in its DisplayName field...

Can someone help me to get this working?

Answer 1

[Jan]

You can create the legend dynamically and define the line handles to show explicitely:

Name = get(hline, 'DisplayName');
isVisible = strcmp(get(hline, 'Visible'), 'on');
legend(hline(isVisible), Name(isVisible));

You can call this from the callback, which toggles the visibility of the lines.