Hi,

I'm doing a project where I wish to keep the mouse pointer within the applet window. For this i'm using the awt.Robot class, but whenever I do robot.mouseMove() the mouseX and mouseY doesn't update for around 300 ms eventhough the user keeps moving the mouse. After this delay the mouseX updates normally.

I've made a test example illustrating the problem.. see below..

I know from the faq (http://processing.org/faq.html#java) that there are problems with the awt, but since many posts on this forum refer to the robot class I figured there must be some way to make it work.

I hope someone can help me with this.

I'm using 0135.

_prinds

Code:

import java.awt.*;
import javax.swing.SwingUtilities;

int pmousex = 0, mouseMovement = 0;
boolean centering = false;

PFont font;

void setup()
{
  size(600,600);
  font = loadFont( "AbadiMT-CondensedExtraBold-48.vlw" );
}

void draw()
{
  background( 205 );
  rect( 0,0, 50,height );
  rect( width-50,0, width,height );
  
  textFont( font );
  textAlign(CENTER);
  text( mouseMovement, width*0.5, height*0.5 );
  
  println( "reading mousemovement : millis = " + millis() + ", mouseX = " + mouseX );
  mouseMovement = 0;
}

void mouseMoved()
{
    if( centering ) // don't to add the robot mouse movement to 'mouseMovement'
	{
	  centering = false;
	}else{	  // add normal mouse movement to 'mouseMovement'
	  mouseMovement += mouseX - pmousex;
	  if( mouseX < 50 || mouseX > width-50 ) // if cursor is at left or right side of the window, move it to center
	  {
	    centering = true;
	    println("centering : millis = " + millis() + ", mouseX = " + mouseX);
	    moveCursor();
	  }
	}
	pmousex = mouseX;
    
}

void  moveCursor()
{
	  try {
	    // Move the cursor
	    Robot robot = new Robot();
	    Point p = new Point( int( width*0.5 ), int( height*0.5 ) );
	    SwingUtilities.convertPointToScreen( p, this );
	    robot.mouseMove( p.x, p.y ); // if you remove this line, the will be no delay
	  } 
	  catch (AWTException e) {
	  }
}