/** **************************************************************************
     * "Intelligent" map scrolling.<p>
     *
     * If the new position is within the centre'ish of the map then we shift
     * the cursor there. If it is near the edge then we shift the cursor there
     * and centre the map on that point. "Centre'ish" is defined as the centre
     * 80% of the frame.<p>
     *
     * There is extra intelligence built in to reduce the map redraw overhead by
     * only moving the cursor if it's new screen position is different than
     * the previous one.
     *
     * @param	p	<code>NIPoint</code> giving new position
     */
    public void intelligentScroll(NIPoint p) { /////////////////////////////////// intelligentScroll()
										//
	if (currPos != null)							// If have a current position
	    prevPos = (NIPoint)currPos.clone();					// old current -> previous
	else {									// Else fake a previous one
	    prevPos = new NIPoint();						// make a new one
	    prevPos.forward(currProj);						// forward project it
	    }									//
										//
	currPos = (NIPoint)p.clone();						// New point -> current
	currPos.forward(currProj);						// Forward project new
	if ((currPos.getX() != prevPos.getX()) ||				// If screen pos has changed
	    (currPos.getY() != prevPos.getY())) {				//
	    cursorLayer.setCursorPosition(currPos);				// position cursor there
	    int width = mapBean.getWidth();					// get window width
	    int height = mapBean.getHeight();					// and height
	    if ((currPos.getX() < (width * edgeBand)) ||			// if within x% of left edge
		(currPos.getX() > (width * (1.0f - edgeBand))) ||		// or right edge
		(currPos.getY() < (height * edgeBand)) ||			// or top edge
		(currPos.getY() > (height * (1.0f - edgeBand)))) {		// or bottom edge
		mapBean.setCenter(currPos);					// then centre map on cursor
		}								//
	    }									//
										//
	} //////////////////////////////////////////////////////////////////////// End of intelligentScroll()