Opinions about Mouse Movement Speed

Question

Hi !
I'm experimenting with some Java gfx routines and so I want to code a tiny game, for that I need a small routine to get the current mouse movement speed. I tried this:
myFrame.addMouseMotionListener(new MouseMotionListener() {
  public void mouseMoved(MouseEvent me) {
  if ((me.getX()!=320)||(me.getY()!=240)) {
    spdX = me.getX() - 320;
    spdY = me.getY() - 240;
     myRobot.mouseMove(320,240);
});, but I'm not totally satisfied with this.
a) you'll never get a zero movement with this one
b) I don't know if this would work smooth
Does anyone have any suggestions about this or maybe a link to some resources about that?
thx in advance
Skippy

Answer 1

Well, this is the part of the Code I get my Input-information from:
public class
InputLib
  private static      JFrame               mainFrame;
  private static     int                    spdX, spdY;
  private static     Robot               myRobot;
  private static     boolean               invokedByRobot = false;
  public
  InputLib()
    mainFrame =     GfxLib.getMainFrame();
    try { myRobot = new Robot(); } catch (AWTException awtex) {System.out.println("Couldn't create Robot.");}
    myRobot.mouseMove(320,240);
    mainFrame.addMouseMotionListener(new MouseMotionListener() {
      public void mouseDragged(MouseEvent me) {}
      public void mouseMoved(MouseEvent me) {
        if (!invokedByRobot) {
          if ((me.getX()!=320)||(me.getY()!=240)) {
            spdX = me.getX() - 320;
            spdY = me.getY() - 240;
            invokedByRobot = true;
            myRobot.mouseMove(320,240);
            invokedByRobot = false;
          } else {
//          spdX = 0;  this always returns (0,0) ?!?
//          spdY = 0;
  public static int     getSpdX() {
    return spdX;
  public static int     getSpdY() {
    return spdY;
}and this is my gameloop:
Graphics gr;
Graphics gBB;
while (true) {
  gr = GfxLib.getDrawGraphics();
  if (!GfxLib.contentsLost()) {
    try {
      do {
        GfxLib.resetBackbuffer();
        gBB = GfxLib.getBackBuffer().createGraphics();
        int dx = InputLib.getSpdX();
        int dy = InputLib.getSpdY();
        gBB.drawImage(bg, 0, 0, null);
        gBB.drawLine(100,100,100+dx,100+dy);
        obj1.setSpdX(dx);
        obj1.setSpdY(dy);
        obj1.moveStep();
        obj1.translateTexture(dx,-dy);
        gBB.drawImage(obj1.getViewport(),obj1.getPosX(),obj1.getPosY(),null);
        gBB.dispose();
        gr.drawImage(GfxLib.getBackBuffer(), 0, 0, null);
      while (GfxLib.getBackBuffer().contentsLost());
    catch (Exception e)
      Logger.log(e);
    frameTime = GfxLib.getTicksSinceLastShow();
    if (frameTime < MAX_FRAMES)
    try {
      Thread.sleep(MAX_FRAMES-(frameTime));
    } catch(InterruptedException intex){intex.printStackTrace();}
    GfxLib.show();
    gr.dispose();
}The GfxLib calls handle hardware-accelerated, doublebuffered fullscreen graphics, but this also works when drawing to a normal Component. obj is a simple textured shere that I want to draw onto the screen.
Purpose: simply draw a rolling textured ball controlled by the mouse.
Hope this explains a bit,
Skippy