How to use "getkey" correct ?

I am currently using "getkey" but it appears to include some falts. The worst one is that it stops matlab and goes to the matlab main window, however the maylab script still runs, but it is hard to use without seeing the figure of my apllication.

What alternative functions can be used instead of "getkey" ?

best regards

Ole

Answer 1

[Star Strider]

I am not certain what you are doing. Two options could be waitfor or waitforbuttonpress. There are additional possibilities in the See Also section of both pages.

[Ole]

Thanks for your answer. The waitforbuttonpress does almost work correct, with the exception that i have to press the key two time in order to get the input (still using "getkey")

[Star Strider]

My pleasure!

I am still not certain what you want to do.

In the MATLAB Functions documentation, the section

might have functions that can do what you want. (The 'Control Flow' section is near the end of that page.)

.

[Ole]

I am using a long complex procedure which is polled starting by reading a character from the keyboard. the start of this procedure is:

w = 0;

while w == 0

w = waitforbuttonpress;

end

ch2 = getkey;

if ch2 == 27 % if key = "escape": Set exit

Exit = 1;

end

[Walter Roberson]

getkey() is a File Exchange contribution. There is no certainty that it still works in your release.

[Ole]

Yes, I know that getkey() is not centain to use. However I am not sure how else to read the keybard. Using the waitforbottonpressed did actually prevent the system from showing the matlab-window in front of my application-figure. Therefore, I need a way to read that key-code which is resulting in having waitforbottonpressed to return the value "1". (That I do not know).

So sorry for all my questions, I wrote my matlab code some 25 years ago as a 5 year of speartime-activity in trying to solve a mayor problem with arrays of microphones. The concept I developed did actually obtain a patent which has now expiered due to lifetime. I am now on pension and 83 years old, for what reason my brain is not what it used to be.

Best regards, and thaks a lot for your help

Ole.

[Star Strider]

My pleasure!

No wories about all your questions. That is what MATLAB Answers is for.

I apologise for not being able to solve your problem, since I am still not certain what it actually is.

[Ole]

My problem is that I am using "getkey", how else to read the code of the key pressed ?

[Star Strider]

The only other option I can think of that could work is inputdlg or its friends.

[Walter Roberson]

Perhaps use a figure() or uifigure() WindowKeyPressFcn callback. https://www.mathworks.com/help/matlab/ref/matlab.ui.figure.html#buiwuyk-1-KeyPressFcn