Chief Delphi - Boolean Help?

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- NI LabVIEW (http://www.chiefdelphi.com/forums/forumdisplay.php?f=182)

- - Boolean Help? (http://www.chiefdelphi.com/forums/showthread.php?t=132668)

So I was harmlessly programming, when one of our drivers requested that when he presses a button, the indicator should show true. Then after he's pressed it once, it should stay true until he presses the same button again, making it false.
I know this is possible, but how?

Thanks!

Re: Boolean Help?

Quote:

Originally Posted by aspadiyath (Post 1426550)

https://www.google.com/?gws_rd=ssl#q...m+latch+button

https://www.google.com/?gws_rd=ssl#q...+button+toggle

Re: Boolean Help?

How do I get the latch without a while loop?

Re: Boolean Help?

So he wants it to toggle? If so you will need 2 bools. One will store the current mode state and the other will store the last state of the button. If the button is true, it will check the the last state of the button. If the last state is false, change the state of the mode.

Here is an example in C++

Code:

//this code is in the class header

bool pressed;

bool value;



//this code is in the initializer

pressed = false;//saves the button press

value = false;//what ever is being toggled





//this code is in the periodic thread

if(joystick->GetRawButton(1))//gets the button value and checks if it is true

{

        if(pressed == false)//Checks if the last button state was false

        {

                value = !value; //flips the value

        }

        pressed = true;//saves the buttons state

}

else//if the button is not pressed

{

        pressed = false;//saves the buttons state

}

I know its not LabView but the concept should be the same.

Re: Boolean Help?

We have this VI in our programming library, available from this thread
http://www.chiefdelphi.com/forums/sh...d.php?t=131783
I believe it's under 'logic'.

Re: Boolean Help?

One way, except note that buttons are now (2015) retrieved from an array.