private void disposePreviewImage() {
if (fPreviewLabel != null
&& fPreviewLabel.getImage() != null
&& !fPreviewLabel.getImage().isDisposed()) {
fPreviewLabel.getImage().dispose();
}
}
public void disposeLabelImage(Label label) {
disposeRegion(label);
Image image = label.getImage();
if (image != null) {
label.setImage(null);
image.dispose();
}
}