layout_data = new GridData();
layout_data.grabExcessHorizontalSpace = true;
layout_data.horizontalAlignment = GridData.FILL;
slider_composite.setLayoutData(layout_data);
slider_composite.setLayout(new GridLayout(1,true));
file_size_slider = new ExSlider(slider_composite){
public boolean validate(double upValue, double downValue) {
long min_unit = (Long)min_file_size_units.getData(min_file_size_units.getText());
long max_unit = (Long)max_file_size_units.getData(max_file_size_units.getText());
double min = formatSize(downValue, min_unit);
double max = formatSize(upValue, max_unit);