+ axis_pixel_height + seq_pixel_height);
maps = new NeoMap[2];
maps[0] = seqmap;
maps[1] = axismap;
zoomPoint = new VisibleRange();
hairline = new Shadow(this.seqmap);
axishairline = new Shadow( this.axismap);
zoomPoint.addListener(hairline);
zoomPoint.removeListener(axishairline);