# Simplify box selection in a table

**URL:** <https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026>\
**Category:** Coding Questions\
**Created:** [June 12, 2019, 5:16pm UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026 "2019-06-12T17:16:21Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![hugo](https://avatars.discourse-cdn.com/v4/letter/h/b38774/32.png) [@hugo](https://discourse.processing.org/u/hugo)\
**Post date:** [June 12, 2019, 5:16pm UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026/1 "2019-06-12T17:16:21Z")

</div>

hello,  
here is my program :

```auto
int AM=0;
int R=0;

void setup() {
  frameRate(30);
  size(480,320);
}

void draw() {
  background(255);
  stroke(180);
  strokeWeight(2);
  for (int ix = 64; ix < 315; ix = ix+64) {
    line(0, ix, width, ix);
  } for (int iy = 96; iy < 475; iy = iy+96) {
    line(iy, 0, iy, height);
  }
  fill(0);
  textSize(35);
  textAlign(CENTER,CENTER);
  for (int i2y = 32; i2y < 289; i2y = i2y + 64) {
    for (int i2x = 48; i2x < 433; i2x = i2x + 96) {
      text(AM,i2x,i2y);
      if (AM<24) {
        AM=AM+1;
      } else {
        AM=0;
        i2y = 32;
        i2x = 48;
      }
    }
  }
  
  //
}

```

I would like that when we click on a box the variable R takes the value of this box. But I do not want to rewrite:

```auto
if (mousePressed && mouseX<96 && mouseX>0 && mouseY<64 && mouseY>0) {
   R=24;
}

```

25 times for each box.  
Is it possible to simplify the code?  
Thank you.

---

<div class="post-metadata">

**Author:** ![InferNova](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/infernova/32/6009_2.png) [@InferNova](https://discourse.processing.org/u/InferNova)\
**Post date:** [June 12, 2019, 5:34pm UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026/2 "2019-06-12T17:34:10Z")

</div>

Hey There!

Each box has it’s size and co-ordinates so building a class and making 25 objects from with a method that checks collision will have you only write the method once but work for all objects which use that class!

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 12, 2019, 8:44pm UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026/3 "2019-06-12T20:44:14Z")

</div>

for a solution without class / oop think along these lines:

```auto

int AM=0;
int R=0;

void setup() {
  size(480, 320);
}

void draw() {
  background(255);
  stroke(180);
  strokeWeight(2);

  fill(0);
  textSize(35);
  textAlign(CENTER, CENTER);

  int cellSize=30; 
  for (int i2y = 0; i2y < 8; i2y = i2y + 1) {
    for (int i2x = 0; i2x < 8; i2x = i2x + 1) {
      rect( i2x * cellSize, i2y * cellSize, cellSize, cellSize);
    }
  }
}

void mousePressed() {
  int cellSize=30;

  fill(255, 0, 0); // RED 
  for (int i2y = 0; i2y < 8; i2y = i2y + 1) {
    for (int i2x = 0; i2x < 8; i2x = i2x + 1) {
      if (mouseX > i2x * cellSize 
        && mouseX < i2x * cellSize + cellSize
        && mouseY > i2y * cellSize
        && mouseY < i2y * cellSize + cellSize) 
        rect( i2x * cellSize, i2y * cellSize, cellSize, cellSize);
    }
  }
}

```

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 12, 2019, 8:47pm UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026/4 "2019-06-12T20:47:15Z")

</div>

additionally use a two-dimensional array to store the values for R in

see tutorial:

[https://www.processing.org/tutorials/2darray/](https://www.processing.org/tutorials/2darray/)

---

<div class="post-metadata">

**Author:** ![hugo](https://avatars.discourse-cdn.com/v4/letter/h/b38774/32.png) [@hugo](https://discourse.processing.org/u/hugo)\
**Post date:** [June 13, 2019, 5:40am UTC](https://discourse.processing.org/t/simplify-box-selection-in-a-table/12026/5 "2019-06-13T05:40:58Z")

</div>

thank you very much. 👍