Mouse Functions
/**
* Mouse Functions.
*
* Click on the box and drag it across the screen.
*/
float bx;
float by;
int boxSize = 75;
bool overBox = false;
bool locked = false;
float xOffset = 0.0f;
float yOffset = 0.0f;
void setup() {
size(640, 360);
bx = width / 2.0f;
by = height / 2.0f;
rectMode(RADIUS);
}
void draw() {
background(0);
// Test if the cursor is over the box
if (mouseX > bx - boxSize && mouseX < bx + boxSize &&
mouseY > by - boxSize && mouseY < by + boxSize) {
overBox = true;
if (!locked) {
stroke(255);
fill(153);
}
} else {
stroke(153);
fill(153);
overBox = false;
}
// Draw the box
rect(bx, by, boxSize, boxSize);
}
void mousePressed() {
if (overBox) {
locked = true;
fill(255, 255, 255);
} else {
locked = false;
}
xOffset = mouseX - bx;
yOffset = mouseY - by;
}
void mouseDragged() {
if (locked) {
bx = mouseX - xOffset;
by = mouseY - yOffset;
}
}
void mouseReleased() {
locked = false;
}