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MouseWheelListener (Read 1451 times)

pandereto

MouseWheelListener
Nov 12^th, 2009, 9:52am

Hi i´m doing my first processing project.

i try to build a sketch of a video playback controlled speed by the mousewheel, so if the user spin faster the video play faster and if dont spin the video pause.... Roll Eyes

So i need to check when the user stop spining the mousewheel, i search and find how to implement a listener to get the speed but i dont see any event like onStopMoving or somethig like that.

How can i know when the mousewheel stop spining ??????

Thanks in advance

blindfish God Member Offline Posts: 793	Re: MouseWheelListener Reply #1 - Nov 12^th, 2009, 10:08am See MouseEvent > MOUSE_WHEEL. When that event isn't being triggered the mouse wheel isn't moving If you need help implementing MouseEvent in Processing do a search of the forum - I've certainly posted examples; though I haven't used MOUSE_WHEEL it should be pretty straightforward...
	Where is the what if the what is in why?

pandereto YaBB Newbies Offline Posts: 8	Re: MouseWheelListener Reply #2 - Nov 12^th, 2009, 10:21am blindfish Thanks for your fast reply, i will try it. Its so obvious that im feeling embarassed....

pandereto

Re: MouseWheelListener
Reply #3 - Nov 13^th, 2009, 5:05am

i did this skecth, i use a boolean var to indicate if the mousewheel is spining or not.

So in setup() set the var value to false and when the mousewheel event is tiggered the var value is set to true.

But how can i do to reset the var value to false when i stop spining the mousewheel. Can someone give me a clue about that, im sure that its a simple task but i can even imagine how to do....... Tongue

boolean funciona;

void setup() {
size(960, 540, P2D);
background(0);
funciona=false;
addMouseWheelListener(new java.awt.event.MouseWheelListener() {
public void mouseWheelMoved(java.awt.event.MouseWheelEvent evt) {
funciona = true;
}});
}

void draw()
{
println(funciona);
}

blindfish

Re: MouseWheelListener
Reply #4 - Nov 13^th, 2009, 5:44am

Actually after posting that link it occurred to me that this issue might be a problem. I was just looking at one possible workaround which involves registering mouse events with Processing - something Quark posted a while ago and that I've found useful for dealing with mouse events in classes... However it doesn't appear to work with Mouse wheel events - though it may be that I've made a mistake in the implementation here:

Code:

boolean funciona;


void setup() {
 size(960, 540, P2D);
 background(0);
 funciona=false;

 // Presumably when you're not registering the event with a class you just register it with 'this'...
 registerMouseEvent(this);

}


void draw() {
  if(funciona) {
    println("mouse wheel event");
  }

} 

void mouseEvent(MouseEvent event){
  switch(event.getID()) {
   // For test purposes - this works
   //case MouseEvent.MOUSE_PRESSED:
   //  println("pressed");
   //break; 
   
   // but this doesn't :(
   case MouseEvent.MOUSE_WHEEL:
     println("wheelmoved");
     funciona = true;
   break;
  
  // I figured if you were only checking for mouseWheel events in this switch() you could simply use default to set funciona back to false...
  default:
    funciona = false;
  break;
  }
}

Hopefully someone better placed than I can offer a suitable solution Wink

Where is the what if the what is in why?

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: MouseWheelListener Reply #5 - Nov 13^th, 2009, 6:15am MOUSE_WHEEL is nowhere in Processing's core sources. Even "wheel" is found once, in "color wheel"...

blindfish God Member Offline Posts: 793	Re: MouseWheelListener Reply #6 - Nov 13^th, 2009, 6:17am I'd assumed that behaviour was inherited from Java. Are there issues with using AWT in Processing?
	Where is the what if the what is in why?

pandereto YaBB Newbies Offline Posts: 8	Re: MouseWheelListener Reply #7 - Nov 13^th, 2009, 7:07am So it appears to be a big problem what im trying to do its to use a treadmill to simule a virtual jogging, i thinked to use the mousewheel of the mouse to get the(runing speed), but maybe i try to put the mouse in the bottom.... What do you think? i can chek if the mouse is moving and the speed Thaaaaanks for your help

blindfish

Re: MouseWheelListener
Reply #8 - Nov 13^th, 2009, 7:45am

When you say treadmill you mean in real physical space So you wanted to physically attach the mousewheel to the treadmill to get its speed That's awesome and Heath Robinson would be impressed Cheesy

I guess you could use the mouse in the alternative way you describe... Otherwise you might want to look at using something like Arduino to use as an interface to some real world sensors. It's got plenty of inputs so you could potentially attach some more accurate speed measuring sensors as well as heart-rate sensors etc. and feed them all into Processing...

Where is the what if the what is in why?

pandereto

Re: MouseWheelListener
Reply #9 - Nov 13^th, 2009, 7:57am

Yes, a real treadmill and a 8mX4m semispheric screen in front. So if you run the video play and seems like runing... Cheesy

Arduino seems the "professsional way to do that" maybe i can use a rotary sensor (like the one that its in a mousewheel).

For the video part im using the JMCvideo library.... any advice or recomendation about that.

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