Help on a console project

[Ironbatman1]

Hello!!! so I’ve been working on making a console using processing, I’m making it similar to windows terminal or Linux bash command line. but I’m having a bit of an issue with getting what you previously typed to slowly move up the screen as you enter commands or words.

As it stands right now I can make it so the text appears briefly above the mainline and it stores previously typed words in a list, right now it only shows the last in the list.

import org.multiply.processing.*;

int boxColor = 0;
int conFlashRate = 9;
String consoleText = "";

StringList prevText;

TimedEventGenerator consoleCursorDrawLoop;

void setup(){
  size(800, 600);
  background(0);
  
  prevText = new StringList();
  
  consoleCursorDrawLoop = new TimedEventGenerator(this, "onChangeMarker");
  consoleCursorDrawLoop.setIntervalMs(conFlashRate * 60);
}

void draw() {
  clear();
  
  
  
  push();
  fill(boxColor);
  rect(0, height - 35, 15, 35);
  fill(255);
  text(consoleText, 18, height - 2);
  textSize(35);
  pop();
  
  if(prevText.size() > 0){
    DrawPrevText();
  }
  
}

void DrawPrevText(){
  for(int i = prevText.size()-1; i >= 0; i--){
    if(i == prevText.size()-1){
      push();
      fill(200);
      text(prevText.get(i), 18, height - 37);
      textSize(35);
      pop();
    }
  }
}

void onChangeMarker(){
  if(boxColor == 0){
    boxColor = 225;
  }else{
    boxColor = 0;
  }
}

void WriteToConsole(char charToWrite){
  consoleText = consoleText + charToWrite;
}

void ClearConsole(){
  consoleText = "";
}

void RemoveLastChar(){
  if(consoleText != null && consoleText.length() > 0){
    String newText = consoleText.substring(0, consoleText.length() - 1);
    ClearConsole();
    consoleText = newText;
  }
}

void keyReleased(){
  if(key == ENTER){
    prevText.append(consoleText);
    ClearConsole();
  }else if(key == BACKSPACE){
    RemoveLastChar();
  }else{
    WriteToConsole(key);
  }
}

[paulgoux]

Have you tried using a premade text area class. G4P comes with its own and so does controlP5.

[Flolo]

Hey I dont know this library. Where can I download it?

[Flolo]

I know its not the quation but if you want to build a terminal maybe you want to run them in the background in cmd?
If yes here is the code:

class CmdCommand {
  //This class needs: import java.io.*;
  CmdCommand(String command) {
    //Shutdown pc command: shutdown -p
    ProcessBuilder builder = null;

    builder = new ProcessBuilder("cmd.exe", "/c", command);

    if (builder == null) return;

    builder.redirectErrorStream(true);
    Process p = null;
    try {
      p = builder.start();
    } 
    catch (Exception e) {
      println(e);
    }
    if (p == null) return;
    BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
    String line = null;
    while (true) {
      try {
        line = r.readLine();
      } 
      catch (Exception e) {
        println(e);
      }
      if (line == null) {
        break;
      }
      println(line);
    }
  }
}

[Ironbatman1]

Hm that would be smart, but wouldnt that still leave the problem of having the user press enter and what they had entered goes up, them once they do somthing else it pushes it up again?

[Ironbatman1]

I like the idea but not what this project is for, im working on an os and i figured that id start by making a console first, thanks though!

[paulgoux]

If the text areas can be drawn onto a separate canvas then anything outside the canvas is invisible. Therefore if you know the position you are in in your text area relative to its height you can implement some logic to move the text area y component up or down. When it’s y position is set to negative relative to the canvas, then the top of the text area will be hidden.

However I do believe that both of the libraries have implemented something to take care of all of this as they come with sliders. Therefore it’s probably as easy as setting the slider position through code, and again I’m sure both libraries should have some methods to allow you to do that.

[Ironbatman1]

Ill give it a shot! Was hopping to not rely on a library but that would be easiest

[paulgoux]

You don’t have to but why reinvent the wheel.

[Ironbatman1]

Good point definitely will try it thanks!

[paulgoux]

simple text input class

Simple text input program

A program that allows to type in text. Whenever you hit enter, it will print it into the console. Features: Can enter letters from the “acceptableInput” string use arrow keys (LEFT and RIGHT) or click on the text to edit text use BACKSPACE / DELETE to remove letters ENTER to erase input and print it into the console flexible interface blinker String input = ""; int buffer = 20, minWidth = 200, cursorLocation = 0, lastInput = 0, resumeBlinkAfter = 300; String acceptableInput = "aAbBcCdDeEfFgG…

also note that the text method has an alternative call which allows you to set the width of a body of text see the text reference for details, and finally here is a text input class I put together for fun in the past. It doesnt have all the features, ie highlighting etc but it should be pretty close.

Also please bear in mind this is an old build so it might have some bugs.

Summary

`
import processing.core.PApplet;
import processing.core.PGraphics;
import processing.core.PVector;

public class TextArea extends KeyboardFunctions{
public PApplet applet;
float x,y,w,h,bx,by,textSize = 12,spacing = 2,txoff,tyoff,lxpos,r1,r2,r3,r4,value;
public int last,lines,xpos,ypos;
public String textArea;
public String text = “”,blankLine=“”,tempLine = “”,label = “”;
public boolean update,blink,visible = true,vScroll,hScroll;
public boolean mdown,toggle,border,bgFill,localTheme,setMouse,isNumber,box;
public char currentKey;
public int col;
public PVector mouse;
public PGraphics canvas,parentCanvas;

public TextArea(float x_,float y_,float w_,float h_,PApplet p){
applet = p;
init(applet);
x = x_;
bx = x;
y = y_;
by = y;
w = w_;
h = h_;

//applet.textSize(textSize);
canvas = applet.createGraphics((int) w+1000,(int) h+1000);
//while(applet.textWidth(blankLine)<w-applet.textWidth("")

};

public TextArea(float x_,float y_,float w_,float h_,String Label,PApplet p){
applet = p;
init(applet);
label = Label;
x = x_;
bx = x;
y = y_;
by = y;
w = w_;
h = h_;

canvas = applet.createGraphics((int) w,(int) h);
//applet.textSize(textSize);
//while(applet.textWidth(blankLine)<w-applet.textWidth("")

};

public void draw(){
setMouse();
// getCursor();
//if(mouse)
if(parentCanvas==null) {
draw(true);
}
else {
draw(parentCanvas,true);
}

};

@Override
public void keyPressed() {
getKey();
};

public void draw(boolean k){
logic(true);
getCursor(true);
//getKey();

      if(canvas!=null){
        
        canvas.beginDraw();
        canvas.fill(255);
        canvas.strokeWeight(0);
        canvas.rect(0,0,w,h);
        canvas.stroke(0);
        canvas.strokeWeight(2);
        if(label!=null){
          canvas.fill(col);
          canvas.text(label,0,0+(textSize)-3);
          //println(label);
        }
        float ry = textSize;
        if(textSize>h-textSize)textSize = h;
        applet.textSize(textSize);
        lxpos = 0;
        if(textArea!=null&&ypos<textArea.length&&xpos<=textArea[ypos].length())lxpos = applet.textWidth(textArea[ypos].substring(0,xpos));
        if(applet.frameCount%30==0&&blink)blink = false;
        else if(applet.frameCount%60==0&&!blink)blink = true;
        if(blink)canvas.line(0+lxpos,0+ypos*(textSize+spacing),0+lxpos,0+ypos*(textSize+spacing)+textSize);
        
        if(textArea!=null){
          
          canvas.fill(0,0,255,50);
          canvas.noStroke();
          
          for(int i=0;i<textArea.length;i++){
            
            //canvas.rect(0,0+(textSize+spacing)*i,w,ry);
          }
          canvas.fill(col);
          canvas.textSize(textSize);
          if(textSize==h)tyoff = -5;
          for(int i=0;i<textArea.length;i++){
              String s = textArea[i];
              
              canvas.text(s,0+txoff,0+(textSize+spacing)*i+textSize+tyoff);
          }
        }
        canvas.endDraw();
        applet.image(canvas,x,y);
        //println(canvas.width);
      }

};

public void draw(PGraphics scene,boolean b1){

if(scene !=null){

  logic(true);
  getCursor(true);
  if(pos())applet.fill(255);
  if(canvas!=null&&visible){
    canvas.beginDraw();
    canvas.fill(255);
    canvas.strokeWeight(0);
    canvas.rect(0,0,w,h,r1,r2,r3,r4);
    canvas.stroke(0);
    canvas.strokeWeight(2);
    float ry = textSize;
    if(textSize>h-textSize)textSize = h;
    if(label!=null){
      canvas.textSize(textSize);
      canvas.fill(0);

      //canvas.text(label,0,0+(textSize));
    }
    applet.textSize(textSize);
    //lxpos = 0;
    if(textArea!=null&&xpos>-1&&ypos>-1&&ypos<textArea.length
        &&xpos<=textArea[ypos].length())
      lxpos = applet.textWidth(textArea[ypos].substring(0,xpos));
    if(applet.frameCount%30==0&&blink)blink = false;
    else if(applet.frameCount%30==0&&!blink)blink = true;
    if(blink&&toggle)canvas.line(lxpos,0+ypos*(textSize+spacing),0+lxpos,0+ypos*(textSize+spacing)+textSize);

    if(textArea!=null){
      canvas.fill(0,0,255,50);
      canvas.noStroke();
      for(int i=0;i<textArea.length;i++){

        if(textArea.length>1) {
          if(i==0)
            canvas.rect(x,y+(textSize+spacing)*i,w,ry,r1,r2,0,0);
          else if(i==textArea.length-1)
            canvas.rect(x,y+(textSize+spacing)*i,w,ry,0,0,r3,r4);
          else 
            canvas.rect(x,y+(textSize+spacing)*i,w,ry);
        }else canvas.rect(x,y+(textSize+spacing)*i,w,ry,r1,r2,r3,r4);
      }
      canvas.fill(col);
      canvas.textSize(ry);
      if(textSize==h)tyoff = -3;
      for(int i=0;i<textArea.length;i++){
        String s = textArea[i];

        canvas.text(s,0+txoff,0+(textSize+spacing)*i+textSize+tyoff);
      }
    }
    canvas.endDraw();
    //scene.beginDraw();
    scene.image(canvas,x,y);
    //scene.endDraw();
  }
}

};

public void update(){
if(update){
if(ypos==last){

  }else{
    int l = text.length()-1;
    textArea[last] = textArea[last]+text.charAt(l);
  }

  update = false;
}

};

public void keyLogic(){

};

public void logic(){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;

}
if(textArea!=null&&textArea.length>0){
  lines = textArea.length-1;
  last = textArea[lines].length()-1;
}

if(pos()&&applet.mousePressed)toggle = true;
if(!pos()&&applet.mousePressed)toggle = false;

if(vScroll){

}
if(hScroll){

}
//if(!pos&&applet.mousePressed)toggle=false;
//if(

};

public void logic(boolean b1){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;

}
if(label!=null&&toggle)label = null;

//if(pos(mouse))applet.println(mouse.x,mouse.y);
if(pos(mouse)&&applet.mousePressed)toggle = true;
if(!pos(mouse)&&applet.mousePressed)toggle = false;

if(vScroll){

}
if(hScroll){

}
//if(!pos&&applet.mousePressed)toggle=false;
//if(

};

public void logic(PVector mouse){
if(mouse!=null){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;

  }
  if(textArea!=null&&textArea.length>0){
    lines = textArea.length-1;
    last = textArea[lines].length()-1;
  }

  if(pos(mouse)&&applet.mousePressed)toggle = true;
  if(pos(mouse)&&!applet.mousePressed)toggle = false;

  if(vScroll){

  }
  if(hScroll){

  }
}
//if(!pos&&applet.mousePressed)toggle=false;
//if(

};

public void getKey(){
boolean b1 = ypos*(textSize+spacing)<h-(textSize+spacing)*2;
boolean b2 = lxpos<w;
if(applet.key!=applet.CODED&&applet.key!=applet.BACKSPACE&&applet.key!=applet.ENTER){
String s = “”;
s+= applet.key;
b2 = lxpos<w - applet.textWidth(s);
}
if(b2&&!b1&&applet.key!=applet.ENTER)b1 = true;
if(toggle&&b1&&b2){
applet.textSize(textSize);
if(applet.key!=applet.CODED&&applet.key!=applet.BACKSPACE&&applet.key!=applet.ENTER){
currentKey = applet.key;

    if(textArea==null){

      textArea = new String[1];
      textArea[0] = text;
      xpos = text.length();
    }else{
      if(ypos<textArea.length&&ypos>-1){
        if(xpos==tempLine.length()){
          tempLine += currentKey;

          textArea[ypos] = tempLine;
          xpos = textArea[ypos].length();
          setText(textArea);
        }else if(xpos<tempLine.length()){
          String s1 = tempLine.substring(0,xpos);
          String s2 = "";
          if(xpos>2)textArea[ypos].substring(xpos-2,textArea[ypos].length()-1);
          else if(textArea[ypos].length()>0)
            textArea[ypos].substring(0,textArea[ypos].length()-1);

          tempLine = s1+currentKey;

          for(int i=xpos;i<textArea[ypos].length();i++){
            char a = textArea[ypos].charAt(i);
            tempLine+= a;
          }
          textArea[ypos] = tempLine;
          xpos =s1.length()+1;
          setText(textArea);
        }

      }
    }

  }
  else if(applet.key==applet.BACKSPACE){
    backSpace();
  }else if(applet.key==applet.ENTER){
    enter();
  }
  arrowKeys();
}

};

public void backSpace(){
if(textArea!=null){
if(textArea.length==1||ypos==0){
if(xpos==textArea[0].length()){
if(xpos>0){
tempLine = textArea[0].substring(0,textArea[0].length()-1);
xpos = tempLine.length();
textArea[0] = tempLine;
}

    }else if(xpos>0){
      tempLine = textArea[0].substring(0,xpos-1);
      xpos = tempLine.length();
      for(int i=xpos+1;i<textArea[0].length();i++){
        tempLine+= textArea[0].charAt(i);
      }
      textArea[0] = tempLine;
    }
  }else{

    if(xpos==textArea[ypos].length()||xpos==0){

      if(xpos>0){

        tempLine = textArea[ypos].substring(0,textArea[ypos].length()-1);
        xpos = tempLine.length();
        textArea[ypos] = tempLine;
      }else{
        String s2 = textArea[ypos].substring(xpos,textArea[ypos].length());
        String[] temp = new String[textArea.length-1];
        //temp[ypos-1] = textArea[ypos-1];
        for(int i=0;i<ypos;i++){
          temp[i] = textArea[i];
        }
        temp[ypos-1]+= s2;
        for(int i=ypos+1;i<textArea.length;i++){
          temp[i-1] = textArea[i];
        }
        //
        tempLine = textArea[ypos];
        xpos = textArea[ypos-1].length();
        tempLine += s2;
        for(int i=0;i<textArea[ypos].length();i++){
          char a = textArea[ypos].charAt(i);
          tempLine += a;
        }
        textArea = temp;
        ypos --;
      }

    }else{
      if(xpos>0){
        tempLine = textArea[ypos].substring(0,xpos-1);
        xpos = tempLine.length();
        for(int i=xpos+1;i<textArea[ypos].length();i++){
          tempLine+= textArea[ypos].charAt(i);
        }
        textArea[ypos] = tempLine;
      }else{
        tempLine = textArea[ypos-1].substring(0,textArea[ypos-1].length());
        //xpos = tempLine.length();
        for(int i=xpos+1;i<textArea[ypos].length();i++){
          tempLine+= textArea[ypos].charAt(i);
        }
        textArea[ypos] = tempLine;
      }
    }
  }
}

};

public void enter(){
if(ypos ==textArea.length-1){
if(xpos==tempLine.length()){
String temp = new String[textArea.length+1];
for(int i=0;i<temp.length;i++){
if(i<textArea.length)temp[i] = textArea[i];
else {
temp[i] = “”;
}
}
tempLine = “”;
textArea = temp;
setText(textArea);
ypos = textArea.length-1;
}else{
String temp = new String[textArea.length+1];
for(int i=0;i<textArea.length;i++){
temp[i] = textArea[i];
}
String s1 = “”,s2 = “”;
//for(int i=0;i<ypos-1;i++){
// temp[i] = textArea[i];
//}
temp[ypos] = textArea[ypos].substring(0,xpos);
//temp[ypos] = “”;
temp[temp.length-1] = textArea[ypos].substring(xpos,textArea[ypos].length());

    tempLine = temp[ypos+1];
    //xpos = tempLine.length();
    textArea = temp;
    setText(textArea);
    ypos = textArea.length-1;
    //xpos = 0;
  }
  xpos = 0;

}else{
  String []temp = new String[textArea.length+1];

  if(xpos==textArea[ypos].length()){

    for(int i=0;i<ypos+1;i++){
      temp[i] = textArea[i];
    }
    temp[ypos+1] = "";
    for(int i=ypos+2;i<temp.length;i++){
      temp[i] = textArea[i-1];
    }
    tempLine = "";
    textArea = temp;
    setText(textArea);
    ypos ++;
    xpos = 0;
  }
  else{
    for(int i=0;i<ypos;i++){
      temp[i] = textArea[i];
    }

    for(int i=ypos+1;i<textArea.length+1;i++){
      temp[i] = textArea[i-1];
    }

    if(xpos>textArea[ypos].length())xpos = textArea[ypos].length();
    temp[ypos] = textArea[ypos].substring(0,xpos);
    //xpos = temp[ypos].length();
    temp[ypos+1] = textArea[ypos].substring(xpos,textArea[ypos].length());
    for(int i=ypos+2;i<temp.length;i++){
      temp[i] = textArea[i-1];
    }
    tempLine = temp[ypos];
    textArea = temp;
    setText(textArea);
    //xpos = tempLine.length();
    xpos = 0;
    ypos ++;
  }

}

};

public void arrowKeys(){
if(applet.keyCode==37&&xpos>0){
xpos–;
}else if(applet.keyCode==37&&xpos==0&&ypos>0){
ypos–;
xpos = textArea[ypos].length();
tempLine = textArea[ypos];
}else if(applet.keyCode==39&&xpos<textArea[ypos].length()){
xpos++;
}else if(applet.keyCode==39&&xpos==textArea[ypos].length()&&ypos<textArea.length-1){
xpos = 0;
ypos++;
tempLine = textArea[ypos];
}else if(applet.keyCode==38&&ypos>0){
ypos–;
tempLine = textArea[ypos];
if(tempLine==“”)xpos = 0;
if(xpos>tempLine.length())xpos = tempLine.length();
}else if(applet.keyCode==40&&ypos<textArea.length-1){
ypos++;
tempLine = textArea[ypos];
if(tempLine==“”)xpos = 0;
if(xpos>tempLine.length())xpos = tempLine.length();
}
};

public void setText(String s){
text = s;
textArea = new String[1];
textArea[0] = s;
};

public void setText(String s){
text = “”;
for(int i=0;i<s.length;i++){
String s1 = s[i];
if(s.length>0&&s1.length()>0&&s1.charAt(s1.length()-1)!=‘\n’)s1 += “\n”;
//s[i] = s1;
text+=s1;
}
};

boolean pos(){
boolean k = false;
float max = 0;

  return mouse.x>x&&mouse.x<x+w&&mouse.y>y&&mouse.y<y+h;

};

boolean lpos(){
boolean k = false;
float max = 0;
if(textArea!=null)max = textArea.length*(textSize+spacing);

if(parentCanvas==null)return applet.mouseX>x&&applet.mouseX<x+w&&applet.mouseY>y&&applet.mouseY<y+max;
else return mouse!=null&&mouse.x>x&&mouse.x<x+w&&mouse.y>y&&mouse.y<y+max;

};

public boolean pos(PVector m){
boolean k = false;
if(m ==null)m = setMouse();
if(parentCanvas==null)return m.x>x&&m.x<x+w&&m.y>y&&m.y<y+h;
else return m.x>x&&m.x+x<x+w&&m.y>y&&m.y+y<y+h;
};

public boolean lpos(PVector m){
boolean k = false;
float max = textArea.length*(textSize+spacing);
if(parentCanvas==null)return m.x>x&&m.x<x+w&&m.y>y&&m.y<y+max;
else return m.x>x&&m.x+x<x+w&&m.y>y&&m.y+y<y+max;
};

public int getCursor(){
int k = -1;
int kx = -1;
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
//canvas.beginDraw();
applet.textSize(textSize);
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(applet.mouseY,y,y+max,0,textArea.length));

    if(k<textArea.length){

      ypos = k;

      String s = "";
      for(int i=0;i<textArea[k].length();i++){
        s += textArea[k].charAt(i);
        float tw1 = applet.textWidth(s)-5;
        if(applet.mouseX<x+tw1&&applet.mouseX>x)break;
        else kx = i;
        if(i==textArea[k].length()-1&&applet.mouseX>x+tw1&&applet.mouseX>x)kx = textArea[k].length();
      }
      //canvas.endDraw();
      if(kx>-1)xpos = kx;
      tempLine = textArea[k];
      if(tempLine.length()==0)xpos = 0;
    }
    if(textArea!=null&&k<textArea.length&&textArea[k].length()==0)xpos = 0;
  }}else if(applet.mousePressed)toggle = false;

return k;

};

public int getCursor(boolean b1){
int k = -1;
int kx = -1;
applet.fill(255);
// parentCanvas.ellipse(mouse.x, mouse.y, 20, 20);
// else if(applet.mousePressed)applet.println(“txtarea no mouse”);
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(mouse.y,y,y+max,0,textArea.length));

    if(k<textArea.length){
      //int 
      ypos = k;
      applet.textSize(textSize);
      String s = "";
      for(int i=0;i<textArea[k].length();i++){
        s += textArea[k].charAt(i);
        float tw1 = applet.textWidth(s)-5;
        if(mouse.x<x+tw1&&mouse.x>x)break;
        else kx = i;

        if(i==textArea[k].length()-1&&mouse.x>x+tw1&&mouse.x>x)kx = textArea[k].length();
      }
      if(kx>-1)xpos = kx;

      //if(tempLine.length()==0)xpos = 0;
    }
    if(textArea!=null&&k<textArea.length&&textArea[k].length()==0)xpos = 0;
  }}else if(applet.mousePressed)toggle = false;

return k;

};

public int getCursor(PVector mouse){
int k = -1;
int kx = -1;
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(mouse.y,y,y+max,0,textArea.length));

    if(k<textArea.length){

      ypos = k;
      applet.textSize(textSize);
      String s = "";
      for(int i=0;i<textArea[k].length();i++){
        s += textArea[k].charAt(i);
        float tw1 = applet.textWidth(s)-5;

        if(mouse.x<x+tw1&&mouse.x>x)break;
        else kx = i;

        if(i==textArea[k].length()-1&&mouse.x>x+tw1&&mouse.x>x)kx = textArea[k].length();
      }
      if(kx>-1)xpos = kx;
    }
    tempLine = textArea[k];
  }}else if(applet.mousePressed)toggle = false;

return k;

};

public PVector setMouse(){
if(parentCanvas==null){
mouse = new PVector(applet.mouseX,applet.mouseY);
}
else {

// mouse.x = applet.mouseX;
// mouse.y = applet.mouseY;

}
return mouse;

};

public void addLine() {
String temp = new String[textArea.length];
for(int i=0;i<textArea.length;i++) {
temp[i] = textArea[i];
}
tempLine = “”;
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;

};

public void addLineAt(int a) {
String temp = new String[textArea.length];
for(int i=0;i<a;i++) {
temp[i] = textArea[i];
}
temp[a] = “”;
tempLine = “”;
for(int i=a;i<textArea.length;i++) {
temp[i] = textArea[i-1];
}
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;

};

public void addLineAt(int a,int j) {
String temp = new String[textArea.length];
for(int i=0;i<a;i++) {
temp[i] = textArea[i].substring(0,j);
}
temp[a] = “”;
for(int i=xpos;i<textArea[ypos].length();i++) {
temp[a] += textArea[ypos].charAt(i);
}
tempLine = temp[a];
for(int i=a;i<textArea.length;i++) {
temp[i] = textArea[i-1];
}
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;

};

//public float

public void setRadius(float a) {

r1 = a;
r2 = a;
r3 = a;
r4 = a;

};

public void setRadius(float a,float b,float c,float d) {

r1 = a;
r2 = b;
r3 = c;
r4 = d;

};

public void reset() {
textArea = new String[1];
textArea[0] = “”;
tempLine = “”;
text = “”;
xpos = 0;
ypos = 0;

};

public void setPos(float a,float b) {

x = a;
bx = a;
y = b;
by = b;

};

public float getValue() {
float a;
if(tempLine.length()>0) {
return Float.parseFloat(tempLine);
}else return -999999;
};

public void save() {

};

public void set(float a) {

if(isNumber) {
  value = a;
  tempLine = "";
  tempLine+= a;
  setText(tempLine);
}

};

public void setSize(float a){
box = true;
textSize = a;
h = a;

};

};
`

keyboard functions

Summary

`
import processing.core.PApplet;
import processing.event.KeyEvent;

public class KeyboardFunctions {
PApplet p;

public KeyboardFunctions() {

};

public void init(PApplet p) {
p.registerMethod(“keyEvent”, this);
};

public void destroy(){
//destroys the registermethod or something like that
};

public void keyEvent(final KeyEvent evt) {
switch(evt.getAction()) {
case KeyEvent.PRESS:
keyPressed();
//getKeyCode();
break;
case KeyEvent.RELEASE:
// keyReleased();
//getKeyCode();
break;
}
};

public void keyPressed() {
//this.key1 = key;
//this.keyCode1 = keyCode;
};

public void keyReleased() {
};
};
`

sketch

TextArea t1;

void setup(){
  size(400,400);
  t1 = new TextArea(20,20,200,200,this);
  background(255);
};

void draw(){
  t1.draw();
};

`