hello.
im doing some controls, and i need to calculate the offset of the mouse-position on my slider button. i just started using classes and i cant seem to get the void mousePressed and released to work inside a class. if i use if(mousePressed) this offset will calculate simultaneously. how can i replicate the effect of void mousePressed which is only called once inside a class?

thank you

beautiful!
thank you so much for the quick answer!

Slm

Hi. For drag & drop purpose, I usually use a global variable which stores a reference to the object dragged. And I add a condition test so when the mouse is dragged, only this object can be moved.

Code:

class myObject {
  void mouseDragged() {
    if (draggedObj != this) return;
    // drag code...
  }
  void mousePressed() {
    if (isMouseOver()) draggedObj = this;
  }
}

myObject draggedObj;
myObject myObj1;

void mousePressed() {
  myObj1.mousePressed();
}

void mouseDragged() {
  myObj1.mouseDragged();
}

void mouseReleased() {
  draggedObj = null;
} 

Lovely stuff. Thanks for that guys!

sorry if i'm not understanding everything and asking here.

the overCheck() is working, but i get for every object in my class a "false" for the boolean "over", when i press the mouse. i don't understand?

Code:

// the variables
int numBalls = 10;
Ball[] balls = new Ball[numBalls];
boolean over = false;

// setup is doing things one time in the beginning
void setup() {
  size(1024, 768);
  noStroke();
  smooth();
  for (int i = 0; i < numBalls; i++) {
    balls[i] = new Ball(random(width), random(height), random(20, 40), i, balls);
  }
}

// draw is doing things everytime
void draw() {
  background(0);
  for (int i = 0; i < numBalls; i++) {
    // the class methods for every object in my array
    balls[i].display();
    balls[i].distCheck();
    balls[i].overCheck();
  }
}

// mousemethods classextern
// mousePressed
void mousePressed() {
  for (int i = 0; i < numBalls; i++) {
    balls[i].mousePressed(mouseX, mouseY, mouseButton);
  }
}

// mouseReleased
void mouseReleased() {
  for (int i = 0; i < numBalls; i++) {
    balls[i].mouseReleased();
  }
}

// creating the class
class Ball {
  float x, y;
  float diameter;
  int id;
  Ball[] others;
 
  Ball(float xin, float yin, float din, int idin, Ball[] oin) {
    x = xin;
    y = yin;
    diameter = din;
    id = idin;
    others = oin;
  } 

// show all
  void display() {
    fill(255,125);
    rect(x, y, diameter, diameter);
  }

// check distance and draw the line  
  void distCheck() {
    for (int i = id + 1; i < numBalls; i++) {
	float dx = others[i].x - x;
	float dy = others[i].y - y;
	float distance = sqrt(dx*dx + dy*dy);
	float minDist = 200;
	if (distance < minDist) { 
	  stroke(255);
	  line(x, y, others[i].x, others[i].y);
	}
    }   
  }

// check for every ball if mouse is over
  void overCheck(){
    if(mouseX > x && mouseX < (x+diameter) && mouseY > y && mouseY < (y+diameter)){
	over = true;
	println("w");
    } else {
	over = false;
    }
  }
  
// Mousemethods class intern
// mousepressed
  void mousePressed(int mx, int my, int mbutton){
    println(over);
  }
    
// mousereleased    
  void mouseReleased(){
  }
  
// the End  
}