Eclipse SWT 1 等比缩放

1 布局方式

2 测试代码

package com.xu.gui;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.ProgressBar;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;

public class TestGui {

	protected Shell shell;

	public static void main(String[] args) {
		try {
			TestGui window = new TestGui();
			window.open();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void open() {
		Display display = Display.getDefault();
		createContents();
		shell.open();
		shell.layout();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}

	protected void createContents() {
		shell = new Shell();
		shell.setSize(582, 434);
		shell.setText("SWT Application");
		shell.setLayout(new FillLayout(SWT.HORIZONTAL));

		Composite composite = new Composite(shell, SWT.NONE);
		// ✅ 使用 FormLayout
		composite.setLayout(new FormLayout());

		// ✅ 进度条设置自动缩放
		ProgressBar bar = new ProgressBar(composite, SWT.NONE);
		bar.setToolTipText("进度条");
		bar.setMinimum(0);
		bar.setMaximum(100);

		FormData barData = new FormData();
		barData.left = new FormAttachment(0, 0); // 左边对齐父容器 0%
		barData.right = new FormAttachment(100, 0); // 右边对齐父容器 100%
		barData.top = new FormAttachment(0, 0); // 顶部对齐父容器 0%
		barData.height = 20; // 高度固定
		bar.setLayoutData(barData);

		// ✅ 按钮位置固定不动
		Button button = new Button(composite, SWT.NONE);
		button.setText("进度条");

		FormData buttonData = new FormData();
		buttonData.left = new FormAttachment(0, 10); // 左边距 10 像素
		buttonData.bottom = new FormAttachment(100, -10); // 底部距下边缘 10 像素
		button.setLayoutData(buttonData);

		button.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseDown(MouseEvent e) {
				progress(bar);
			}
		});
	}

	private void progress(ProgressBar bar) {
		bar.setSelection(0);
		Display.getDefault().asyncExec(() -> {
			for (int i = 0; i <= 100; i++) {
				bar.setSelection(i);
				try {
					Thread.sleep(10); // 添加延迟可见动画效果
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});
	}
}