This reference is for Processing 2.0+. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.

Name

mouseWheel()
Examples
void setup() {
  size(100, 100);
}

void draw() {} 

void mouseWheel(MouseEvent event) {
  float e = event.getAmount();
  println(e);
}
Description The event.getAmount() method returns negative values if the mouse wheel if rotated up or away from the user and positive in the other direction. On OS X with "natural" scrolling enabled, the values are opposite.
Syntax
mouseWheel(event)
Parameters
event MouseEvent: the MouseEvent
Returnsvoid
Updated on October 26, 2013 08:58:30pm PDT

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