package com.vogella.swt.widgets.layout;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class SWTLayoutPositionTracker {

	// TODO Auto-generated method stub
	static String newLine = System.getProperty("line.separator");
	private static Label positiongLabel;
	private static Shell shell;

	public static void main(String[] args) {
		Display display = new Display();
		shell = new Shell(display);

		positiongLabel = new Label(shell, SWT.BORDER);

		int x = 60;
		int y = 20;
		int width = 400;
		int height = 70;

		positiongLabel.setBounds(x, y, width, height);

		Font font = new Font(positiongLabel.getDisplay(), new FontData("Mono", 10, SWT.ITALIC));
		positiongLabel.setFont(font);
		positiongLabel.setToolTipText("This is the tooltip of this label");

		Button button = new Button(shell, SWT.PUSH);
		button.setBounds(x, y + height + 20, width, height);
		button.setText("press this button\n-results in output on console");
		// register listener for the button selection event
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				System.out.println("Button pressed!");
			}
		});

		int toolbarSize = 30;

		shell.setBounds(200, 400, width + 2 * x, height * 4 + y + toolbarSize);
		shell.open();

		shell.addMouseMoveListener(e -> showSize(e));
		positiongLabel.addMouseMoveListener(e -> showSize(e));

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

	public static void showSize(MouseEvent e) {
		int x = e.x;
		int y = e.y;
		String s = "Bounds for Label: " + positiongLabel.getBounds() + newLine;
		s += "Bounds for Shell: " + shell.getBounds() + newLine;
		s += "Mouse pointer: " + x + " " + y;
		positiongLabel.setText(s);

	}
}