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package org.scijava.ui.console;

import java.util.LinkedList;

import org.scijava.Gateway;
import org.scijava.console.AbstractConsoleArgument;
import org.scijava.console.ConsoleArgument;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.ui.UIService;

/**
 * Handles the {@code --showUI} argument, which signals that the UI should be
 * opened immediately.
 * <p>
 * This is useful for specifying later command line arguments to be handled
 * <em>after</em> the UI is shown, since normally, all arguments are processed
 * before showing the UI.
 * </p>
 *
 * @author Curtis Rueden
 * @see Gateway#launch(String[])
 */
@Plugin(type = ConsoleArgument.class)
public class ShowUIArgument extends AbstractConsoleArgument {

	@Parameter(required = false)
	private UIService uiService;

	// -- Constructor --

	public ShowUIArgument() {
		super(1, "--showUI");
	}

	// -- ConsoleArgument methods --

	@Override
	public void handle(final LinkedList<String> args) {
		if (!supports(args)) return;

		args.removeFirst(); // --showUI

		uiService.showUI();
	}
	// -- Typed methods --

	@Override
	public boolean supports(final LinkedList<String> args) {
		return uiService != null && super.supports(args);
	}

}

Add the --showUI console argument
Add the --showUI console argument

This shows the UI immediately. It is useful if you want to have some
arguments get processed after the UI appears, instead of beforehand.
