Key pressed

ludojoey
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1 week 2 days ago #223 by ludojoey

Key pressed was created by ludojoey

There is a way to determine which key was pressed by using its key code, but I can't find any function that tells me which key was pressed in terms of its ASCII code.

Unless I'm missing something, if I want to know the ASCII value of the pressed key, do I have to perform the conversion myself?

Also, regarding special key combinations (Shift + key, FCTN + key, Ctrl + key), is it up to my application to detect whether one of these modifier keys was pressed immediately before the actual key?

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Franck
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1 week 2 days ago - 1 week 2 days ago #224 by Franck

Replied by Franck on topic Key pressed

Indeed as of now you have to perform the conversion manually. This is a good candidate for a small reusable utility function.

Regarding modifier keys the best practice is to use the built-in FIFO to ensure no key event gets lost and they are stored in the correct order. Example:

Code:

//globals (cannot be locals to the main loop because they need to maintain their states across iterations)
bool FCTN; bool ALT;
//main loop starts here
byte keyDwn=getKeyDwn();
byte keyUp=getKeyUp();
if(keyDwn==79) FCTN=true;
else if(keyDwn==71) ALT=true;
//continue here with other keyDwn tests such as regular keys
//then the keyUp tests:
if(keyUp==79) FCTN=false;
else if(keyUp==71) ALT=false;
//end of main loop

Hope that helps.

Last edit: 1 week 2 days ago by Franck.

The following user(s) said Thank You: ludojoey

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