java/examples/Basics/Input/Keyboard/applet/Keyboard.java

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+import processing.core.*; 
+
+import java.applet.*; 
+import java.awt.*; 
+import java.awt.image.*; 
+import java.awt.event.*; 
+import java.io.*; 
+import java.net.*; 
+import java.text.*; 
+import java.util.*; 
+import java.util.zip.*; 
+import java.util.regex.*; 
+
+public class Keyboard extends PApplet {
+
+/**
+ * Keyboard. 
+ * 
+ * Click on the image to give it focus and press the letter keys 
+ * to create forms in time and space. Each key has a unique identifying 
+ * number called it's ASCII value. These numbers can be used to position 
+ * shapes in space. 
+ */
+ 
+int numChars = 26;
+int[] colors = new int[numChars];
+int keyIndex;
+float keyScale;
+int rectWidth;
+
+    
+public void setup()
+{
+  size(200, 200);
+  noStroke();
+  background(0);
+  keyScale = 200/numChars-1.0f;
+  rectWidth = width/4;
+}
+
+public void draw()
+{ 
+  if(keyPressed) {
+    if(key >= 'A' && key <= 'z') {
+      if(key <= 'Z') {
+        keyIndex = key-'A';
+      } else {
+        keyIndex = key-'a';
+      }
+      fill(millis()%255);
+      float beginRect = rectWidth/2 + keyIndex*keyScale-rectWidth/2;
+      rect(beginRect, 0.0f, rectWidth, height);
+    }
+  }
+}
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "Keyboard" });
+  }
+}