Arrays - Java Software Solutions: Foundations of Program Design - page 426

LISTING 8.20 continued

private class LineListener implements MouseListener,
MouseMotionListener
{
//--------------------------------------------------------------
// Captures the initial position at which the mouse button is
// pressed.
//--------------------------------------------------------------
public void mousePressed (MouseEvent event)
{
point1 = event.getPoint();
}

//--------------------------------------------------------------
// Gets the current position of the mouse as it is dragged and
// redraws the line to create the rubberband effect.
//--------------------------------------------------------------
public void mouseDragged (MouseEvent event)
{
point2 = event.getPoint();
repaint();
}

//--------------------------------------------------------------
// Provide empty definitions for unused event methods.
//--------------------------------------------------------------
public void mouseClicked (MouseEvent event) {}
public void mouseReleased (MouseEvent event) {}
public void mouseEntered (MouseEvent event) {}
public void mouseExited (MouseEvent event) {}
public void mouseMoved (MouseEvent event) {}
}
}

SELF-REVIEW QUESTIONS (see answers in Appendix N)
SR 8.28 What is a mouse event?
SR 8.29 What sequence of mouse events is generated when the mouse button is
clicked over a GUI component and then released?
SR 8.30 What sequence of mouse events is generated when the mouse button is
clicked over a GUI component, the mouse is moved so it is no longer
over that component, and then the mouse button is released?