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GuiJoystick.md

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Home | Reference

GuiJoystick

Example | Constructor | Variables | Functions

Description

Joystick class. This is similar to GuiSlider2d except that the handle snaps back to the center point when input is released.

Picture of a p5.touchgui GuiJoystick

Example

let gui;

// Create a variable for your slider
let j;

// Create variables for tracking position and velocity
let x, y, velX, velY;

function setup() {
  createCanvas(400, 400);
  gui = createGui();
  
  // Create Joystick.
  // The last four optional arguments define minimum and maximum values 
  // for the x and y axes; minX, maxX, minY, maxY
  // The default min and max values for all four are -1 and 1.
  j = createJoystick("Joystick", 10, 210, 175, 175, -1, 1, 1, -1);
  
  // Starting position and velocity
  x     = 300;
  y     = 100;
  velX  = 0;
  velY  = 0;
}

function draw() {
  background("#242038");
  drawGui();
  
  if (j.isChanged) {
    // Print a message when Slider 1 is changed
    // that displays its value.
    print(j.label + " = {" + j.valX + ", " + j.valY + "}");
  }
  
  // Use Joystick's output to change velocity
  velX += j.valX;
  velY += j.valY;  
  
  // Draw our ellipse
  fill("#7AA0FF");
  stroke("#FFFFFF")
  ellipse(x + velX, y + velY, 100);
}

/// Add these lines below sketch to prevent scrolling on mobile
function touchMoved() {
  // do some stuff
  return false;
}

Constructor

createJoystick()

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Example
let gui;
let j;

function setup() {
    createCanvas(400, 400);
    gui = createGui();
    j = createJoystick("Joystick", 50, 50);
}
Description

Creates a new GuiJoystick object. This is a 2 dimensional slider, and the handle snaps back to the center.

Syntax
createJoystick(label, x, y, [w], [h], [minX], [maxX], [maxX], [maxY])
Parameters
  • label String: label for the GuiJoystick
  • x Number: x-coordinate of the GuiJoystick
  • y Number: y-coordinate of the GuiJoystick
  • w Number: width of the GuiJoystick (default is 256)
  • h Number: height of the GuiJoystick (default is 256)
  • minX Number: lower bound of the value's x range (default value is -1)
  • maxX Number: upper bound of the value's x range (default value is 1)
  • minY Number: lower bound of the value's y range (default value is -1)
  • maxY Number: upper bound of the value's y range (default value is 1)
Returns

GuiJoystick

Variables

val

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Example
joystick.val = {x: 0.5, y: 0.5};
if (joystick.isChanged) {
    print(joystick.val.x);
    print(joystick.val.y);
}
Description

Value of the GuiJoystick returned as object {x: valX, y: valY}.

valX

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Example
joystick.valX = 0.5;
if (joystick.isChanged) {
    print(joystick.valX);
}
Description

X value of the GuiJoystick.

valY

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Example
joystick.valY = 0.5;
if (joystick.isChanged) {
    print(joystick.valY);
}
Description

Y value of the GuiJoystick.

minX

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Example
joystick.minX = -100;
Description

Lower x bound of the GuiJoystick range.

maxX

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Example
joystick.maxX = 100;
Description

Upper x bound of the GuiJoystick range.

minY

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Example
joystick.minY = -100;
Description

Lower y bound of the GuiJoystick range.

maxY

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Example
joystick.maxY = 100;
Description

Upper y bound of the GuiJoystick range.

Functions

setStyle()

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Example
joystick.setStyle("fillBg", color(255, 0, 0));
joystick.setStyle({
    fillBg: color("#FF0000"),
    rounding: 10,
    handleRadius: 30
});
Description

Individual GuiJoystick objects can be styled using this method. There are two types of input it takes. Use an input string and value to set an individual property, and use an Object with key/value notation to set multiple properties at once.

Syntax
setStyle(property, value)
setStyle(Object)
Parameters

property String: name of property to be set value Number|String|Object: value of property to be set Object Object: multiple propertys and values to be set

Returns

None

Style

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The GuiJoystick style properties are:

  • strokeWeight Number: the weight (in pixels) of the stroke
  • rounding Number: radius of corners
  • handleRadius Number: radius of handle in pixels
  • fillBg p5.Color: default background fill color
  • fillBgHover p5.Color: hover background fill color
  • fillBgActive p5.Color: active background fill color
  • fillTrack p5.Color: default track fill color
  • fillTrackHover p5.Color: hover track fill color
  • fillTrackActive p5.Color: active track fill color
  • fillHandle p5.Color: default handle fill color
  • fillHandleHover p5.Color: hover handle fill color
  • fillHandleActive p5.Color: active handle fill color
  • strokeBg p5.Color: default background stroke color
  • strokeBgHover p5.Color: hover background stroke color
  • strokeBgActive p5.Color: active background stroke color
  • strokeTrack p5.Color: default track stroke color
  • strokeTrackHover p5.Color: hover track stroke color
  • strokeTrackActive p5.Color: active track stroke color
  • strokeHandle p5.Color: default handle stroke color
  • strokeHandleHover p5.Color: hover handle stroke color
  • strokeHandleActive p5.Color: active handle stroke color