Who do I get size() cannot be used here ?

gek07

class Slider 
{ 
  Slider mySlider ;

  int  x, y ,w=180,h = 10 ,rctx;
  boolean locked ;
  Slider (int x , int y  ){
    rctx=x;
    this.x = x ;
    this.y = y ;
    locked = true ; }

    void lock () 
    {
      locked = true ; 
    }
     void unlock ()
     {if (mouseX>=x-w/2 && mouseX<= x+w/2 &mouseY>= y-h/2 && mouseY<= y+h/2)
     locked = false;
     }
     void drag() 
 {
       if (locked==false)
       {x=mouseX;
       }
     }
     void display()
     { 
     x=constrain (x,rctx,rctx+w);
      rect(rctx,y,180,10);
      fill(128,128,128);
      ellipse(x,y,20,20);
     }}
Slider mySlider ;
void setup()
{  size(300, 100);
   mySlider = new Slider (10,10);
   mySlider.lock();}

  void draw()
  { 
    background (255);
    mySlider.display();

  }

    void mousePressed()
    {
    mySlider.unlock();}
    void mouseDragged()
    {
    mySlider.drag();}
    void mouseReleased()
    {
    mySlider.lock();}

Basic slider class and driver the code runs with a small window .For any value larger than (100 100) I get a weird message about size() cannot be used here .

Chrisir

consider using ctrl-t in processing to auto-format your code in processing

it runs for me though

gek07

for me it doesn't and really I have no idea why it doesn't .

Chrisir

class Slider 
{ 
  //  Slider mySlider ; // ?????????????????????????????????????

  int  x, y, 
    w=180, h = 10, 
    rctx;

  boolean locked ;

  Slider (int x, int y  ) {
    rctx=x;
    this.x = x ;
    this.y = y ;
    locked = true ;
  }

  void lock () 
  {
    locked = true ;
  }

  void unlock ()
  {
    if (mouseX>=x-w/2 && 
      mouseX<= x+w/2 &&
      mouseY>= y-h/2 &&
      mouseY<= y+h/2)
      locked = false;
  }

  void drag() 
  {
    if (!locked)
    {
      x=mouseX;
    }
  }

  void display()
  { 
    x=constrain (x, rctx, rctx+w);
    rect(rctx, y, 180, 10);
    fill(128, 128, 128);
    ellipse(x, y, 20, 20);
  }//method
  //
}// class

// ================================================================

Slider mySlider ;

void setup()
{  
  size(1200, 500);
  mySlider = new Slider (10, 10);
  mySlider.lock();
}

void draw()
{ 
  background (255);
  mySlider.display();
}

void mousePressed()
{
  mySlider.unlock();
}
void mouseDragged()
{
  mySlider.drag();
}
void mouseReleased()
{
  mySlider.lock();
}
//

gek07

kfrajer

What do you have in your other tab?

Kf

Chrisir

you got a second tab

what is in it ?

Chrisir

remember that tabs do not denote different sketches, but just different sections of one sketch that are stitched together when you run it

gek07

I have the slider class in the second tab

Chrisir

like you posted it above?

try to bring it all into one tab and delete the other

you have two times size I guess

no size in the class please

all } correct?

Chrisir

maybe setup needs to be in the tab with the file name?

koogs

i managed to reproduce it. and then i didn't.

i don't like Main as a tab name though.

gek07

For some reason ,on my machine only , the problem was recurring . Upon altering the code on another machine the code ran properly on my machine .

gek07

it keeps happening though

gek07

Untitled

kfrajer

Yes, it is not possible to read your screenshot. Copy and paste your code below and please format your code when you do so. To format, select the code and hit ctrl+o.

Kf

koogs

Size should be in setup, not draw.

You set the size once, at the start, not every frame.