processing4/web/reference/API/keyPressed.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
<name>keyPressed()</name>

<category>Input/Output</category>

<subcategory>Keyboard</subcategory>

<usage>Web &amp; Application</usage>

<example>
<image>keyPressed_.jar</image>
<code>
// Click on the image to give it focus,
// and then press any key

int value = 0;

void loop() {
  fill(value);
  rect(25, 25, 50, 50);
}

void keyPressed() 
{
  if(value == 0) {
    value = 255;
  } else {
    value = 0;
  }
}
</code>
</example>

<description>
The <b>keyPressed()</b> function is called once every time a key is pressed. As a general rule, nothing should be draw within the <b>keyPressed()</b> block.
</description>

<syntax>
void keyPressed() { 
  <c>statements</c>
}
</syntax>

<parameter>
<label></label>
<description></description>
</parameter>

<returns>None</returns>

<related>
keyPressed 
key 
keyCode
keyReleased() 
</related>

<availability>1.0</availability>

<type>Function</type>

<partof>Core</partof>








</root>