find x and y oh a displayed char.

General Discussion Other

secondsky

find x and y oh a displayed char.

in General Discussion • Other • 11 months ago

Hi all, I've a little question.

I've a text box:

text(myString, x, y, width, height);

and i can find all character inside it:

for ( int=0; i < myString.length(); i++)

{

c=myString.charAt(i);

}

Now, there is a way to find the x and y of that specific char?

In this example, it is explained a method to compose a string in wich all chars are object, and it would be a nice method for me, but work only on a line, because the y value is always considered the same.

Thank you all.

http://www.learningprocessing.com/examples/chapter-17/example-17-6/

Replies(3)

clankill3r

Re: find x and y oh a displayed char.

11 months ago

This is how the textMethod looks like in processing:

               
                public void text(String data, int x, int y, int width, int height) {
                 //// wrap into lines
                 String[] lines = textWrap(data, width, height);
                 //// draw lines
                 text(lines, x, y, width, height);
                 }
               
              
               

              
              
               If you dig into the trunk you should be able to figure it out.
              
              
               This is for the mobile i saw later by accident but shouldn't be hard to find the correct one.
              
              
               

              
              
               search for "void text("
              
              
               

              
              
               
               http://code.google.com/searchframe#Ej56LtI_pY0/trunk/processing/core/methods/demo/PGraphics.java&q="void text" package:processing.googlecode.com&ct=rc&cd=2&sq=

PhiLho

Re: find x and y oh a displayed char.

11 months ago

Look at the Reference. See textWidth() (attributes), textAscent() (metrics) and similar functions in the same categories.

secondsky

Re: find x and y oh a displayed char.

11 months ago

Ok for the moment I'm here: I split the text in words with a function that draw a word per time inside a box and rather than directly do it with the text(), writes the words using objects so that you can get back on them to get values.

With a coworker actually we have already carried out a project that can do this, but he used a lot of java functions, in particular awt.

Now, for my passion, I'm trying to learn the same tools, and I would be very interested in going to see inside the classes of processing, as suggested.

I'm missing a little 'experience to do that, but the concept is: you can go into these classes as you can with objects to sk them some values they use inside them?

PFont Helvetica;
PFont Didot;
String testo1;
String url = "dannunzio5.txt";
String[] rawtext;
String testo;
String[] parole;
ArrayList <Parola> frase;
int index=0;
Boolean stampa=true;
void setup()
{
frase =new ArrayList <Parola>();
size(600, 600);
Helvetica = createFont("Helvetica", 10);
Didot = createFont("Didot", 10);
// textFont(Helvetica);//noLoop();
frameRate(5);
}
void draw()
{
background(0);
if (stampa)
{
rawtext = loadStrings(url);
// testo(rawtext, 100,100,200,300);
testo(rawtext, 100, 100, 300, 500, Helvetica, 10, 12);
stampa=false;
}
for (int i=0; i<frase.size();i++)
{
frase.get(i).display();
//frase.remove(i);
}
pushMatrix();
fill(255,0,0,100);
rect(frase.get(index).pos.x, frase.get(index).pos.y,textWidth(frase.get(index).caratteri), -10);
popMatrix();
index++;
if (index == frase.size())
{index=0;
}
}
void mousePressed()
{
pushMatrix();
fill(255,0,0,100);
rect(frase.get(index).pos.x, frase.get(index).pos.y,textWidth(frase.get(index).caratteri), -10);
popMatrix();
index++;
if (index == frase.size())
{index=0;
}
}
void testo(String[] _testo, float _x, float _y, float _w, float _h, PFont _font, float _size, float _interline)
{
//String delimiters = " ,.?!;:[]";
String testo_ = join(_testo, " ");
String[] parole_ = splitTokens(testo_);
Float boxX = _x;
Float boxY = _y;
Float boxW = _w;
Float boxH = _h;
Float Size= _size;
Float interline = _interline;
Float lineW = boxX;
Float lineH = boxY+interline;
PFont font = _font;
textSize(Size);
// textFont(font);
// rettangolo
pushMatrix();
noFill();
stroke(255);
strokeWeight(0.1);
rect(boxX, boxY, boxW, boxH);
popMatrix();
for (int i =0; i< parole_.length; i++)
{
// controllo che questa parola non superi il box
if ((lineW + textWidth(parole_[i])) <= (boxW+boxX))
{
// text(parole_[i], lineW, lineH);
frase.add(new Parola(parole_[i], lineW, lineH, _font, Size));
// Size+=0.1;
//lineW += textWidth(parole_[i]+" ");
lineW += textWidth(parole_[i]+" ");
}
// in quel caso la mando a capo
else
{
lineW = boxX;
lineH += interline;
//text(parole_[i], lineW, lineH);
frase.add(new Parola(parole_[i], lineW, lineH, _font, Size));
lineW += textWidth(parole_[i]+" ");
// Size+=0.02;
}
// se supera il box in altezza interrompo la funzione
if (lineH > boxH+boxY-interline)
{
text("[...]", lineW, lineH);
return;
}
}
}
class Parola {
String caratteri;
PVector pos;
color c = color(255,255,255);
PFont font;
Float Size;
Parola(String _caratteri, float _x, float _y, PFont _font, Float _size)
{
caratteri= _caratteri;
pos= new PVector(_x, _y);
font= _font;
Size=_size;
}
void display()
{
pushMatrix();
fill(c);
textFont(font);
textSize(Size);
text(caratteri, pos.x, pos.y);
popMatrix();
}
}