package test;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class CalculateTest {

	Display display;
	Shell shell;
	Canvas canvas;

	private int MAX_BUTTON_NUM = 10;
	private int LOOP_COUNT = 1000;

	public static void main(String[] args) {
		CalculateTest application = new CalculateTest();
		application.init();
		application.run();

	}

	public void init() {
		display = new Display();
		shell = new Shell(display);

		shell.setText("Test resize performance");

		createMenuBar(shell);
		createContentPane(shell);

	}

	private void createMenuBar(Shell shell) {
		Menu bar = new Menu(shell, SWT.BAR);
		shell.setMenuBar(bar);
		MenuItem item;
		Menu menu = new Menu(bar);
		MenuItem header = new MenuItem(bar, SWT.CASCADE);
		header.setText("Test");
		header.setMenu(menu);

		item = new MenuItem(menu, SWT.PUSH);
		item.setText("Run test");
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				runTest();
			}
		});
	}

	public void run() {
		shell.open();
		while (!shell.isDisposed()) {

			if (!display.readAndDispatch())
				display.sleep();
		}

		display.dispose();
	}

	private void createContentPane(Shell shell) {
		FillLayout fillLayout = new FillLayout(SWT.VERTICAL);
		shell.setLayout(fillLayout);

		for (int i = 0; i < MAX_BUTTON_NUM; i++) {
			//Button button = new Button(shell, SWT.NONE);
			//button.setText("Button " + i);
			CLabel label = new CLabel(shell, SWT.WRAP);
			label.setText("Text item " + i);
		}
		//canvas.setSize(50, 100);
		shell.pack();
		//shell.setBounds(100, 100, 700, 600);
	}

	/**
	 * Body of the test
	 */
	protected void runTest() {
		long start, stop;
		Control children[] = shell.getChildren();
		int len = children.length;
		start = System.currentTimeMillis();
		for (int i = 0; i < LOOP_COUNT; i++)
		{
			for (int j = 0; j<len; j++)
			{
				Control control = children[j];
				Point size = control.computeSize(SWT.DEFAULT, SWT.DEFAULT);
			}
		}
		stop = System.currentTimeMillis();
		System.out.println("calculate  in total:" + (stop - start));
	}
	
}