翻译多边形位置

Question

我想写一个程序，它允许我根据我的鼠标拖动多边形，它是初始mousePressed位置。代码可行，但问题在于它根本不敏感，每一个小鼠标移动都会提供更大的翻译。有没有办法改善它？这是代码：

public void mousePressed(MouseEvent e) {

    //Get mousePressed coordinates
    xMousePressed = e.getX();
    yMousePressed = e.getY();
}
@Override
public void mouseDragged(MouseEvent e) {

    //Drag polygon only if mouse was pressed in the center of the screen
    if (270 < xMousePressed && xMousePressed < 520 
     && 205 < yMousePressed && yMousePressed < 390){

        //Create new mouse location, relative to the last one.
        int xTemp = (int) ((e.getX() - xMousePressed));
        int yTemp = (int) ((e.getY() - yMousePressed));

        //Get list of all the polygons on screen.
        java.util.List<Polygon> tempList = scene.getPolygons();

        //For each point of each polygon
        for(Polygon p: tempList){               
            for(int i = 0; i < p.npoints; i++){
                //Move
                p.xpoints[i] += xTemp;
                p.ypoints[i] += yTemp;                  
            }               
        }

        //Update the mouse position for next movement
        yMousePressed = e.getX();
        yMousePressed = e.getY();

        //Draw the changes on screen.
        this.repaint();
    }       
}