uisetcolor figure goes blank

I have a veirg bug considering the uisetcolor function. I am using this function in a callback of my appdesigner app and for the first time uisetcolor is called it works fine. But after the first call, whenever the uisetcolor function is called it creates a blank figure with a title "Color" and nothing else. Weird thing, if I call the uisetcolor repeatedly (around 4 5 times changes everytime) it works once and then again becomes blank in further calls. I am using 2019a version (without updates due to offline computer) on Windows 10.

[Adam Danz]

Please share the line where you're calling uisetcolor or give let us know if you are using any inputs.

[Tek]

First I have used it without any input but since blank screen only have option to close and without any input function doesn't return any value, I have decided to use it with previous color o f the button. The code snippet:

function results = ColorPicker(app, buttonnumber) %I have several buttons that I will use same color pick function

PickedColor = uisetcolor(ColorArray(buttonnumber, :)); % The different colors of the buttons are stored in rows of ColorArray as R G B triplets

ColorArray(buttonnumber, :) = PickedColor;

results = now;

end

Answer 1

[Gayathri]

Hello @Tek,

I understand that you are getting a blank figure when calling “uisetcolor” in MATLAB R2019a version. But I am not facing this issue at my end.

One solution might be to change

obj.setupURL()

to

obj.URL = 'https://mathworks.com”

in "WebColorChooser.m” in your MATLAB folder.

You can also consider updating MATLAB to the latest version to solve the issue.

Hope you find this information helpful.