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p5.js | doubleClicked() Function

  • Last Updated : 17 Jan, 2020

The doubleClicked() function is invoked whenever a mouse or pointing device causes a dblclick event. This happens when the pointing device is clicked twice in quick succession on a single element. The MouseEvent callback argument could be used to access the details of the click.

Syntax:

doubleClicked([event])

Parameters: This function accepts a single parameter as mentioned above and described below:

  • event: This is an optional MouseEvent callback argument. It can be used to access the click details.

The program below illustrate the doubleClicked() function in p5.js:

Example 1: Using double click to change the fill color.




let colorVal = 0;
  
function setup() {
  createCanvas(500, 300);
  textSize(24);
}
  
function draw() {
  clear();
  
  // apply fill based on the red component
  fill(colorVal, 128, 255 - colorVal)
  
  text("Double click to change the color", 20, 20);
  circle(150, 150, 200);
}
  
function doubleClicked() {
  // change the value if
  // the event occurs
  if (colorVal < 255)
    colorVal += 50;
  else
    colorVal = 0;
}

Output:

Example 2: Accessing the details of the MouseEvent object.




let y = 60;
  
function setup() {
  createCanvas(500, 200);
  textSize(16);
  text("Double click the mouse to see doubleClicked() function fire", 10, 20);
}
  
function doubleClicked(event) {
  // get the x and y location
  // of the double click
  locationX = event.x;
  locationY = event.y;
  
  locString = "Mouse was double clicked at location: "
    + locationX + ", " + locationY;
  text(locString, 10, y);
  y = y + 20;
  
  console.log(event);
}

Output:

Online editor: https://editor.p5js.org/
Environment Setup: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/

Reference: https://p5js.org/reference/#/p5/doubleClicked


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