How to display text in the title of the display window?

Programming Questions

md_za6

How to display text in the title of the display window?

in Programming Questions • 3 months ago

I want to display the frame rate of the sketch as the title of the display window. How would I do this?

Thanks

Replies(7)

calsign

Re: How to display text in the title of the display window?

3 months ago

You can set the frame's title with frame.setTitle("foo"). To accomplish this, you need to call the following every frame (during draw()):

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frame.setTitle(frameRate); //Set the frame title to the frame rate

md_za6

Re: How to display text in the title of the display window?

3 months ago

The method setTitle(String) in the type Frame is not applicable for the arguments (float)

So I guess setTitle can't accept floats as arguments, is there an alternate method or a way to continuously convert the frame rate to an integer?

PhiLho

Re: How to display text in the title of the display window?

3 months ago

frame.setTitle() works in setup() for me, in 2.0.

md_za6, you need to convert the integer to a string:

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void setup()
{
size(500, 200);
frame.setTitle("Sketch");
}
int c;
void draw()
{
frame.setTitle(str(frameRate));
line(c, 0, c, height);
c++;
}

It is a bit "hysterical" this way, perhaps showing the frame rate one frame out of ten is enough:
if (frameCount % 10 == 0) frame.setTitle(str(frameRate));
Example:

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void setup()
{
size(500, 200);
frame.setTitle("Sketch");
frameRate(500);
}
int c;
void draw()
{
if (frameCount % 50 == 0) frame.setTitle(str(frameRate));
line(c, 0, c, height);
c++;
if (c >= width)
{
stroke(random(256));
c = 0;
}
}

GoToLoop

Re: How to display text in the title of the display window?

3 months ago

It's funny I've never encountered this error w/ setTitle().

Now I realize it's b/c I always use a descriptive String before the variable.

And an auto concatenation makes all of them String!

frame.setTitle("FPS: " + frameRate);

Also, "" + variable or variable + "", replaces str(variable).

PhiLho

Re: How to display text in the title of the display window?

3 months ago

" Also, "" + variable or variable + "", replaces str(variable)."
Yes but concatenation of strings creates behind the scene a StringBuffer:

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StringBuffer b = new StringBuffer("");
b.append(variable);
return b.toString();

while str(variable) involves only String.valueOf(variable);

GoToLoop

Re: How to display text in the title of the display window?

3 months ago

I thought Processing's own convert functions did much more than Java's!

At http://processing.org/reference/strconvert_.html I read:

Returns the string representation of primitive datatypes and arrays.

String.valueOf() doesn't deal w/ Arrays but char[]!

Even though str() ends up invoking valueOf() after all; I still think that "" + variable would be faster,

b/c besides being a built-in Java feature, it skips calling a function which is

yet to decide what's the best course to take!

Nevertheless, I think str() is aesthetically better. Plus, it's very handful on converting whole Arrays!

PhiLho

Re: How to display text in the title of the display window?

3 months ago

You have one str() version per type of argument... The simpler types just call String.valueOf(), while the arrays are managed with a loop.

" besides being a built-in Java feature, it skips calling a function"
The function call is probably optimized away by the Jit compiler, anyway. And being "built-in" doesn't mean it is fast: the concatenation creates object to collect later, as show, etc. That's why it is recommended to use a StringBuilder instead of using + in a loop.

" str() is aesthetically better"
Hey, at least we agree on this point!

"" + v feels old school... And str() carries the intent, while "" + v is more obscure.
Note also that String.valueOf() can cache the result (IIRC), so it can be really fast (although perhaps it is only true for integers).

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