public void setErrorMessage(String errorMessage) {
if (tip == null) {
tip = new ErrorToolTip(getTree().getShell());
}
if (errorMessage != "") {
tip.setVisible(false);
TreeItem treeItem = getTree().getSelection()[0];
TreeColumn column = getTree().getColumn(0);
tip.setText(errorMessage);
Point location = new Point(column.getWidth(), treeItem.getBounds().y);
Point controlPoint = getTree().toDisplay(location);
tip.autoSize();
tip.setLocation(controlPoint.x, controlPoint.y - tip.getHeight() - 5);
tip.setVisible(true);
} else {
tip.setVisible(false);
}
}
