A Problem with a piece of code for making a table

Answers

• Chrisir

  February 2017

  Go back

  Edit your post with gear wheel upper right corner

  Now leave a empty line before and after the code

  Now select entire code with mouse

  Hit ctrl-o or the C in the small command bar
• kfrajer

  February 2017 Answer ✓

  the arrays x and y are sometimes empty and i dont know why

  You never assign a value to any of the textFields. You only assign them a value of "zero" when they are initialize, line 69. To test this idea, add between line 69 and 70: a[i].setText(""+i); and tun your code.

  Kf
• qweqwertz

  February 2017 edited February 2017

  the Problem was fixed by breaking out of the for loop when the last Number is found and adding one to the arrays x and y : thank you kfrajer for bringing me on the path for the solution

  import org.gicentre.utils.stat.*;
  import controlP5.*;
  ControlP5 cp5;
  Textfield[] a = new Textfield[80];
  Button b;
  XYChart lineChart;
  float first_x = 50, first_y = 20;
  boolean show_chart = false;
  int lastnumber = 80;
  float[] x, y;
  
  
  void setup() {
    size(1200, 600);
    background(51);
    initialize();
    b = cp5.addButton("zeichnen").setPosition(first_y, 500+first_x).setSize(260, 20);
    lineChart = new XYChart(this);
  }
  
  void draw() {
    background(51);
    line(20, 247+first_x, 279, 247+first_x);
    if (show_chart) {
      lineChart.draw(first_x+260, first_y, width-340, height-30);
    }
  }
  
  
  //Button
  void zeichnen() {
    //setting the arrays to the right length (!)
    for (int i = a.length-1; !(i<0); i--) {
      println(a[i].getText());
      if (!"0".equals(a[i].getText())) {
        lastnumber = i+1;
        break;
      }
    }
    println(lastnumber);
    x = new float[lastnumber];
    y = new float[lastnumber];
    //copying the arrays
    for (int i = 0; i < x.length; i++) {
      x[i] = 10*i;
    }
    for ( int i = 0; i < y.length; i++ ) {
      y[i] = float(a[i].getText());
    }
    //(?)
    lineChart.setData(x, y);
    //formating
    lineChart.showXAxis(true); 
    lineChart.showYAxis(true);
    lineChart.setMinX(0); 
    lineChart.setMinY(0); 
    lineChart.setYFormat("00");
    lineChart.setXFormat("000"); 
    lineChart.setPointColour(color(180, 50, 50, 100));
    lineChart.setPointSize(5);
    lineChart.setLineWidth(2);
    //(works)
    show_chart = true;
  }
  
  
  
  //make all Textboxes (works)
  void initialize() {
    PFont font = createFont("arial", 16);
    cp5 = new ControlP5(this);
    for (int i = 0; i<a.length; i++) {
      a[i] = cp5.addTextfield(str(i)).setFont(font).setColor(color(255)).setColorBackground(0).setColorForeground(0).setText("0").setLabelVisible(false).setSize(50, 20);
      if (i<20) {
        a[i].setPosition(first_y, first_x+25*i);
      } else if (i<40) {
        a[i].setPosition(first_y+70, first_x+25*(i-20));
      } else if (i<60) {
        a[i].setPosition(first_y+140, first_x+25*(i-40));
      } else if (i<80) {
        a[i].setPosition(first_y+210, first_x+25*(i-60));
      } else {
        println("too much objects for in a[]");
      }
    }
  }