private TrackPointAnnotation createHoveredTrackPoint() {
final TrackPointAnnotation trackPoint =
new TrackPointAnnotation(UI.EMPTY_STRING, Position.ZERO);
trackPoint.setAlwaysOnTop(true);
final AnnotationAttributes attributes = trackPoint.getAttributes();
attributes.setCornerRadius(TrackSliderLayer.CHART_SLIDER_CORNER_RADIUS);
attributes.setInsets(
new Insets(
TrackSliderLayer.CHART_SLIDER_MARGIN,
TrackSliderLayer.CHART_SLIDER_MARGIN + 3,
TrackSliderLayer.CHART_SLIDER_MARGIN,
TrackSliderLayer.CHART_SLIDER_MARGIN));
attributes.setDrawOffset(new Point(0, TrackSliderLayer.CHART_SLIDER_DRAW_OFFSET_Y));
attributes.setLeaderGapWidth(TrackSliderLayer.CHART_SLIDER_LEADER_GAP);
attributes.setFont(UI.AWT_FONT_ARIAL_BOLD_12);
// initially hide the annotation
attributes.setVisible(false);
return trackPoint;
}
@Override
protected void doRender(final DrawContext dc) {
final Position sliderPosition = _hoveredTrackPoint.setSliderPosition(dc);
if (sliderPosition != null) {
_hoveredTrackPointLine.makeOrderedRenderable( //
dc, sliderPosition, _hoveredTrackPoint.getAttributes().getTextColor());
}
super.doRender(dc);
}
public void setTrackPointVisible(final boolean isVisible) {
// show/hide track point
_hoveredTrackPoint.getAttributes().setVisible(isVisible);
_hoveredTrackPointLine.setVisible(isVisible);
// show/hide layer
setEnabled(isVisible);
}
