int cursorAtLine(final Location atLocation) {
LOG.debug("pointer at " + atLocation);
final int y = atLocation.getY();
int lineIndex = displayFromLine + (y / target.getText().getLineHeight());
lineIndex = Math.max(lineIndex, 0);
return lineIndex;
}
@Override
public void showDebugFrame(final DebuggableWithTitle[] info, final Location at) {
final InfoDebugFrame f = new InfoDebugFrame();
f.setInfo(info);
f.show(at.getX(), at.getY());
}