当Min = Max = Value = 1时的Matlab滑块

Question

I use a slider to browse through a collection whose size changes dynamically and can very well be 1.

But if I:

set(mySld, 'min', 1, 'max', 1, 'value', 1, 'sliderstep', [1 1])

The slider will look like this, with the so-called thumb half as long as the "trough":

Which is not okay, because if you then click on the left side of the slider, the value will be set to zero, ie out of range, and the slider simply disappears.

Am I using wrong property settings?

(of course, I could set(mySld, 'enable', 'off') whenever Min=Max=1, but it feels like a hack).

Answer 1

You can use a listener to check for the value against the min and/or max:

figure; 
% create the uicontrol
sl = uicontrol ( 'style', 'slider', 'min', 1, 'max', 1, 'value', 1, 'sliderstep', [1 1]);
% create a listener to check the value are reset appropriately
addlistener ( sl, 'Value', 'PostSet', @(obj,event)set ( sl, 'Value', max(sl.Min,  min(sl.Value,sl.Max))) );