how do you get positional information from boolean arrays

[Metalhead]

Hi,

I am constructing a 5x3 boolean array as an input.  I add an array indicator and when I run the program, when i push a button in the array input the corresponding light goes on,on the indicator.

So now, I am trying to get the x,y coordinates of the button pushed so I can use this information in a program.

I cant seem to get the x,y coordinates out.....HELP!

Brian

[M_Peeker]

Hi Brian,

If you use an event structure, a mouse down or mouse up event on the array control will return the coordinates.

[crossrulz]

Using an event structure, you can get the "old value" and the "new value".  Use a Not Equal and then do a search for the TRUE.

[Metalhead]

Thanks, but I don't understand the mouse up/down part...

[crossrulz]

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@Metalhead wrote:

Thanks, but I don't understand the mouse up/down part...

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I recommend using the Value Change event.  That event gives you the "old" and "new" value of the array.  Just do a comparison and find the first element that is different.

[altenbach]

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@crossrulz wrote:
I recommend using the Value Change event.  That event gives you the "old" and "new" value of the array.  Just do a comparison and find the first element that is different.

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 If course if people would actually vote for my idea here, things could get simplified. You could simply do a "array min&max" on the "not equal" array. (see the idea discussion for details).

Until then we could use this (Also works for higher dimensions, 3D, 4D, etc.!):

 

(Other methods for finding the true element of a 2D boolean array requires reshaping to a 1D array, for loops, or other flaming hoops)

[PatrickLye]

I like Altenbach's answer, that's a pretty slick bit of code, but I"m trying to figure out what you are working on that needs this. Is this just an assignment in a class? What are some real life uses for this?

[billko]

To be clear, are you talking about xy coordinates on your screen, or are you talking about xy position in your array?

[johnsold]

Or the array indexes (indices) of the clicked boolean?

Lynn

[altenbach]

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...So now, I am trying to get the x,y coordinates of the button pushed so I can use this information in a program.

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I think it is quite clear that he meant indices. i.e. the information quantized to the buttons. It is probably less intersting to know on which pixel a certain button was clicked. 😄