SWT 浏览器

 这个来自书上的一个例子：

package firstSWT;

import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.ProgressBar;

public class SimpleSWTBrowser {

	//定义浏览器的标题
	public static final String APP_TITLE = "Simple SWT Browser";
	//定义主页的url
	public static final String HOME_URL = "http://www.eclipse.org";
	//声明主窗口和其它控件
	private org.eclipse.swt.widgets.Shell sShell = null;
	private Button backButton = null;//后退按钮
	private Button forwardButton = null;//前进按钮
	private Button stopButton = null;//停止按钮
	private Text locationText = null;//显示url的文本框
	private Button goButton = null;//转向按钮
	private Browser browser = null;//浏览器对象
	private Button homeButton = null;//主页按钮
	private Label statusText = null;//显示浏览器状态的文本框
	private ProgressBar progressBar = null;//装载页面时的进度条
	private Button refreshButton = null;//刷新按钮

	//初始化浏览器
	private void createBrowser() {
		org.eclipse.swt.layout.GridData gridData3 = new org.eclipse.swt.layout.GridData();
		//创建浏览器对象
		browser = new Browser(sShell, SWT.BORDER);
		gridData3.horizontalSpan = 7;
		gridData3.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData3.verticalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData3.grabExcessVerticalSpace = true;
		//设置浏览器布局
		browser.setLayoutData(gridData3);
		//为浏览器注册标题改变事件
		browser.addTitleListener(new org.eclipse.swt.browser.TitleListener() {
			public void changed(org.eclipse.swt.browser.TitleEvent e) {
				sShell.setText(APP_TITLE + " - " + e.title);
			}
		});
		//为浏览器注册地址改变事件
		browser.addLocationListener(new org.eclipse.swt.browser.LocationListener() {
			public void changing(org.eclipse.swt.browser.LocationEvent e) {
				locationText.setText(e.location);
			}

			public void changed(org.eclipse.swt.browser.LocationEvent e) {
			}
		});
		//为浏览器注册装载网页事件
		browser.addProgressListener(new org.eclipse.swt.browser.ProgressListener() {
			//当装载时，设置装载的进度，并且设置停止按钮可用
			public void changed(org.eclipse.swt.browser.ProgressEvent e) {
				if (!stopButton.isEnabled() && e.total != e.current) {
					stopButton.setEnabled(true);
				}
				progressBar.setMaximum(e.total);
				progressBar.setSelection(e.current);
			}
			//装载完成后设置停止按钮，后退按钮，前进按钮和进度条的状态
			public void completed(org.eclipse.swt.browser.ProgressEvent e) {
				stopButton.setEnabled(false);
				backButton.setEnabled(browser.isBackEnabled());
				forwardButton.setEnabled(browser.isForwardEnabled());
				progressBar.setSelection(0);
			}
		});
		//注册浏览器状态改变事件
		browser.addStatusTextListener(new org.eclipse.swt.browser.StatusTextListener() {
			public void changed(org.eclipse.swt.browser.StatusTextEvent e) {
				statusText.setText(e.text);
			}
		});
		//初始状态打开主页的url
		browser.setUrl(HOME_URL);
	}
	
	public static void main(String[] args) {
		org.eclipse.swt.widgets.Display display = org.eclipse.swt.widgets.Display.getDefault();
		SimpleSWTBrowser thisClass = new SimpleSWTBrowser();
		thisClass.createSShell();
		thisClass.sShell.open();

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

	//创建窗口和窗口的控件
	private void createSShell() {
		sShell = new org.eclipse.swt.widgets.Shell();
		org.eclipse.swt.layout.GridLayout gridLayout1 = new GridLayout();
		org.eclipse.swt.layout.GridData gridData2 = new org.eclipse.swt.layout.GridData();
		org.eclipse.swt.layout.GridData gridData4 = new org.eclipse.swt.layout.GridData();
		org.eclipse.swt.layout.GridData gridData5 = new org.eclipse.swt.layout.GridData();
		org.eclipse.swt.layout.GridData gridData6 = new org.eclipse.swt.layout.GridData();
		org.eclipse.swt.layout.GridData gridData7 = new org.eclipse.swt.layout.GridData();
		org.eclipse.swt.layout.GridData gridData8 = new org.eclipse.swt.layout.GridData();
		backButton = new Button(sShell, SWT.ARROW | SWT.LEFT);
		forwardButton = new Button(sShell, SWT.ARROW | SWT.RIGHT);
		stopButton = new Button(sShell, SWT.NONE);
		refreshButton = new Button(sShell, SWT.NONE);
		homeButton = new Button(sShell, SWT.NONE);
		locationText = new Text(sShell, SWT.BORDER);
		goButton = new Button(sShell, SWT.NONE);
		createBrowser();
		progressBar = new ProgressBar(sShell, SWT.BORDER);
		statusText = new Label(sShell, SWT.NONE);
		sShell.setText(APP_TITLE);
		sShell.setLayout(gridLayout1);
		gridLayout1.numColumns = 7;
		backButton.setEnabled(false);
		backButton.setToolTipText("Navigate back to the previous page");
		backButton.setLayoutData(gridData6);
		forwardButton.setEnabled(false);
		forwardButton.setToolTipText("Navigate forward to the next page");
		forwardButton.setLayoutData(gridData5);
		stopButton.setText("Stop");
		stopButton.setEnabled(false);
		stopButton.setToolTipText("Stop the loading of the current page");
		goButton.setText("Go!");
		goButton.setLayoutData(gridData8);
		goButton.setToolTipText("Navigate to the selected web address");
		gridData2.grabExcessHorizontalSpace = true;
		gridData2.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData2.verticalAlignment = org.eclipse.swt.layout.GridData.CENTER;
		locationText.setLayoutData(gridData2);
		locationText.setText(HOME_URL);
		locationText.setToolTipText("Enter a web address");
		homeButton.setText("Home");
		homeButton.setToolTipText("Return to home page");
		statusText.setText("Done");
		statusText.setLayoutData(gridData7);
		gridData4.horizontalSpan = 5;
		progressBar.setLayoutData(gridData4);
		progressBar.setEnabled(false);
		progressBar.setSelection(0);
		gridData5.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData5.verticalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData6.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData6.verticalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData7.horizontalSpan = 1;
		gridData7.grabExcessHorizontalSpace = true;
		gridData7.horizontalAlignment = org.eclipse.swt.layout.GridData.FILL;
		gridData7.verticalAlignment = org.eclipse.swt.layout.GridData.CENTER;
		gridData8.horizontalAlignment = org.eclipse.swt.layout.GridData.END;
		gridData8.verticalAlignment = org.eclipse.swt.layout.GridData.CENTER;
		refreshButton.setText("Refresh");
		refreshButton.setToolTipText("Refresh the current page");
		sShell.setSize(new org.eclipse.swt.graphics.Point(553, 367));
		//注册显示地址的文本框事件
		locationText.addMouseListener(new org.eclipse.swt.events.MouseAdapter() {
			public void mouseUp(org.eclipse.swt.events.MouseEvent e) {
				locationText.selectAll();
			}
		});
		locationText.addKeyListener(new org.eclipse.swt.events.KeyAdapter() {
			public void keyPressed(org.eclipse.swt.events.KeyEvent e) {
				// Handle the press of the Enter key in the locationText.
				// This will browse to the entered text.
				if (e.character == SWT.LF || e.character == SWT.CR) {
					e.doit = false;
					browser.setUrl(locationText.getText());
				}
			}
		});
		refreshButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.refresh();//重新载入
			}
		});
		locationText.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.setUrl(locationText.getText());//设置浏览器的指向的url
			}
		});
		stopButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.stop();//停止装载网页
			}
		});
		backButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.back();//后退
			}
		});
		forwardButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.forward();//前进
			}
		});
		homeButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.setUrl(HOME_URL);//设置主页
			}
		});
		goButton.addSelectionListener(new org.eclipse.swt.events.SelectionAdapter() {
			public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
				browser.setUrl(locationText.getText());//转向地址的网页
			}
		});
	}
}

 

效果图：