Arduino/build/shared/examples/10.Mouse/ButtonMouseControl/ButtonMouseControl.ino

/*
  ButtonMouseControl
 
 Controls the mouse from five pushbuttons on an Arduino Leonardo.
 
 Hardware:
 * 5 pushbuttons attached to D2, D3, D4, D5
 
 
 The mouse movement is always relative. This sketch reads 
 four pushbuttons, and uses them to set the movement of the mouse.
 
 WARNING:  When you use the Mouse.move() command, the Arduino takes
 over your mouse!  Make sure you have control before you use the mouse commands.
 
 created 9 Mar 2012
 by Tom Igoe
 
 this code is in the public domain
 
 */

// set pin numbers for the five buttons:
const int upButton = 2;     
const int downButton = 3;        
const int leftButton = 4;
const int rightButton = 5;
const int mouseButton = 6;

int range = 12;            // output range of X or Y movement
int responseDelay = 6;     // response delay of the mouse, in ms


void setup() {
  // initialize the buttons' inputs:
  pinMode(upButton, INPUT);       
  pinMode(downButton, INPUT);       
  pinMode(leftButton, INPUT);       
  pinMode(rightButton, INPUT);       
  pinMode(mouseButton, INPUT);
}

void loop() {
  // read the buttons:
  int upState = digitalRead(upButton);
  int downState = digitalRead(downButton);
  int rightState = digitalRead(rightButton);
  int leftState = digitalRead(leftButton);
  int clickState = digitalRead(mouseButton);

  // calculate the movement distance based on the button states:
  int  xDistance = (leftState - rightState)*range;
  int  yDistance = (upState - downState)*range;

  // if X or Y is non-zero, move:
  if ((xDistance != 0) || (yDistance != 0)) {
    Mouse.move(xDistance, yDistance, 0);
  }

  // if the mouse button is pressed:
  if (clickState == HIGH) {
    // if the mouse is not pressed, press it:
    if (!Mouse.isPressed(MOUSE_LEFT)) {
      Mouse.press(MOUSE_LEFT); 
    }
  } 
  // else the mouse button is not pressed:
  else {
    // if the mouse is pressed, release it:
    if (Mouse.isPressed(MOUSE_LEFT)) {
      Mouse.release(MOUSE_LEFT); 
    }
  }

  // a delay so the mouse doesn't move too fast:
  delay(responseDelay);
}