Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Basics/Input/Keyboard/Keyboard.pde

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+/**
+ * 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. These numbers can be used to position shapes in space. 
+ */
+
+int rectWidth;
+   
+void setup() {
+  size(640, 360);
+  noStroke();
+  background(0);
+  rectWidth = width/4;
+}
+
+void draw() { 
+  // keep draw() here to continue looping while waiting for keys
+}
+
+void keyPressed() {
+  int keyIndex = -1;
+  if (key >= 'A' && key <= 'Z') {
+    keyIndex = key - 'A';
+  } else if (key >= 'a' && key <= 'z') {
+    keyIndex = key - 'a';
+  }
+  if (keyIndex == -1) {
+    // If it's not a letter key, clear the screen
+    background(0);
+  } else { 
+    // It's a letter key, fill a rectangle
+    fill(millis() % 255);
+    float x = map(keyIndex, 0, 25, 0, width - rectWidth);
+    rect(x, 0, rectWidth, height);
+  }
+}