@Override
protected void doRender(DrawContext dc) {
if (this.frameTimestamp != dc.getFrameTimeStamp()) {
this.assembleControlPoints(dc);
this.frameTimestamp = dc.getFrameTimeStamp();
}
this.markerRenderer.render(dc, this.controlPoints);
if (this.annotation != null && isShowAnnotation()) {
this.annotation.render(dc);
}
}
/**
* Compute label geometry, if it has not already been computed this frame, or if the label
* position has changed since the extent was last computed.
*
* @param dc Current geometry.
*/
protected void computeGeometryIfNeeded(DrawContext dc) {
// Re-use rendering state values already calculated this frame. If the screenExtent is null,
// recompute even if
// the timestamp is the same. This prevents using a stale position if the application calls
// setPosition and
// getBounds multiple times before the label is rendered.
long timeStamp = dc.getFrameTimeStamp();
if (timeStamp != this.frameTimeStamp || this.screenExtent == null) {
this.computeGeometry(dc);
this.frameTimeStamp = timeStamp;
}
}