Text formatting, console and by text on the screen

Programming Questions

myupctoys

Text formatting, console and by text on the screen

in Programming Questions • 3 years ago

Hi,

Been trying to figure out why my teext formatting isnt predicatable. Help.

I fill the strarray with data from a serial port. That seems to happen but this is the way it gets formatted on the console area.

Receiving :-
#00 0

#00 0,
#00 0,
#00 0,
#00 0

What I want is

Receiving :- #00 0

#00 0, #00 0, #00 0, #00 0

Second using the text command I want to print "A Test" to the screen. But it flickers briefly on the screen then dissappears.

void serialEvent(Serial myPort)
{
String input = myPort.readStringUntil(0x0D);

if((input != null))
{
    println("Receiving :-" + input);
    strarray[pointer] = input;
    pointer++;
    if (pointer == 4)
      {
        pointer = 0;
      }
      myPort.clear();
}
else
{
   String joined = join(strarray, ", ");
   println(trim(joined));
}
   text("A Test", 20, 200, 150, 30);
}

Any clues?

Thanks

Stefan

Replies(5)

kooogy

Re: Text formatting, console and by text on the screen

3 years ago

those newlines are probably part of the input string - just use trim() to remove them (oh, you are...)

and that print() won't add newlines whereas println() does.

PhiLho

Re: Text formatting, console and by text on the screen

3 years ago

Well, if the newlines are part of the received data, you should trim each 'input', not the joined string.
And the text flickers because you draw it at one event, but draw() probably erases the sketch on each call. You might want to put the text in a global variable and display it in draw() (after the background() call!).

myupctoys

Re: Text formatting, console and by text on the screen

3 years ago

Hi,

Will give it a try. Confused why trim() didn't remove non printable characters, (there is a 0x0D and 0x0A in the unformatted strings), if it does it to individual strings why wouldn't it do it to a joined string. No matter has to be something like that. Processing is great but formatting has been giving me heaps of grief. Too used to C and trying to play with the strings this way is a bit new, I'll get there.

Fair enough about the draw() stuff. Will try writing to it as a global.

Thanks

Stefan

PhiLho

Re: Text formatting, console and by text on the screen

3 years ago

trim(): " Removes whitespace characters from the beginning and end of a String."
You can use Java: joined.replaceAll("\\s+", "");

myupctoys

Re: Re: Text formatting, console and by text on the screen

3 years ago

Thanks guys,

All working.

Now I'm starting to have some fun. Parseing GPS NMEA strings and doing something useful with them. Feel like I actually have some control over it all.

Most things about processing are pretty good. Had me a bit stuffed about enumeration not being supported and when you want more than processing has to offer the KISS approach of most JAVA references gets me a bit lost. Hardly suprising when I'm a hardware person dabbling with software.....

I'm creating some 3D looking LEDs at the moment but next want to have some analogue meters in a data logger application.

Has anyone created analogue meter style widgets?

Cheers

Stefan

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