JCEF-tab形式展示浏览器
当我们点击target值为_blank的链接时，JCEF默认以弹出窗口的形式打开新页面，要实现tab栏形式，可参考以下步骤
1.创建一个实现CefLifeSpanHandlerAdapter的类，重写onBeforePopup方法：根据url创建一个CefBrowser对象，将CefBrowser的UI组件设置到JTabbedPane
2.设置onBeforePopup方法的返回值为true，取消弹出窗口
注意：因为JTabbedPane默认没有关闭按钮，需要自己使用JPanel之类的组件实现
设计思路：打开新窗口时，在JTabbedPane里新建一个Tab，利用CefClient创建一个CefBrowser对象，并将CefBrowser的UI添加到Tab，显示新创建的Tab
JTabbedPane默认没有关闭按钮，我们自定义一个JPanel来实现标题栏和关闭按钮。JPanel包含两个JLabel标题，一个显示页面标题，一个显示“X”。为“X”添加单击事件监听器，当点击“X”时，销毁Tab关联的CefBrowser对象，移除Tab
这里先写一个实体类，用来保存Tab关闭时要用到的数据
TabBrowser
public class TabBrowser {
/**索引，与关闭按钮关联*/
private int index;
/**浏览器对象*/
private CefBrowser browser;
/**浏览器标题*/
private JLabel title;
/**
* 获取 索引，与关闭按钮关联
* @return index
*/
public int getIndex() {
return index;
}
/**
* 设置 索引，与关闭按钮关联
* @param index 索引，与关闭按钮关联
*/
public void setIndex(int index) {
this.index = index;
}
/**
* 获取浏览器对象
* @return browser
*/
public CefBrowser getBrowser() {
return browser;
}
/**
* 设置 浏览器对象
* @param browser browser
*/
public void setBrowser(CefBrowser browser) {
this.browser = browser;
}
/**
* 设置浏览器标题
* @return title
*/
public JLabel getTitle() {
return title;
}
/**
* 设置 浏览器标题
* @param title 浏览器标题
*/
public void setTitle(JLabel title) {
this.title = title;
}
/**
* @param index
* @param browser
* @param title
*/
public TabBrowser(int index, CefBrowser browser, JLabel title) {
super();
this.index = index;
this.browser = browser;
this.title = title;
}
}
创建一个处理标题更新的Handler
DisplayHandler
public class DisplayHandler extends CefDisplayHandlerAdapter {
private TabbedPaneTestFrame frame;
public DisplayHandler(TabbedPaneTestFrame frame) {
this.frame=frame;
}
/* (non-Javadoc)
* @see org.cef.handler.CefDisplayHandlerAdapter#onTitleChange(org.cef.browser.CefBrowser, java.lang.String)
*/
@Override
public void onTitleChange(CefBrowser browser, String title) {
this.frame.updateTabTitle(browser, title);
// super.onTitleChange(arg0, arg1);
}
}
创建一个处理弹出窗口的Handler
LifeSpanHandler
public class LifeSpanHandler extends CefLifeSpanHandlerAdapter {
private TabbedPaneTestFrame frame;
public LifeSpanHandler(TabbedPaneTestFrame frame) {
this.frame=frame;
}
/* (non-Javadoc)
* @see org.cef.handler.CefLifeSpanHandlerAdapter#onBeforePopup(org.cef.browser.CefBrowser, org.cef.browser.CefFrame, java.lang.String, java.lang.String)
*/
@Override
public boolean onBeforePopup(CefBrowser browser, CefFrame frame, String target_url, String target_frame_name) {
this.frame.createBrowser(target_url);
//返回true表示取消弹出窗口
return true;
}
}
创建一个点击关闭按钮的监听器
TabCloseListener
public class TabCloseListener implements MouseListener{
private int index;
private TabbedPaneTestFrame frame;
public TabCloseListener(int index,TabbedPaneTestFrame frame) {
this.index=index;
this.frame=frame;
}
/* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
*/
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
System.out.println("点击了关闭事件...");
frame.removeTab(null, index);
}
/* (non-Javadoc)
* @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
*/
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
*/
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
*/
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
*/
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
}
主类代码
TabbedPaneTestFrame
public class TabbedPaneTestFrame extends JFrame{
/**
*
*/
private static final long serialVersionUID = 871314861019393323L;
private static CefApp cefApp;
private static CefClient cefClient;
private boolean useOSR;
private boolean isTransparent;
/**tabbedPane对象*/
private static JTabbedPane tabbedPane;
/**TabBrowser对象列表**/
private List tbList=new Vector();
/**tab使用的索引。此索引不是tab在tabbedpane中的索引，此索引用来移除tab栏**/
private int tbIndex=0;
/**默认的标题名*/
private final static String TITLE_INFO="正在载入...";
public TabbedPaneTestFrame(String url) {
//是否Linux系统
useOSR=OS.isLinux();
//是否透明
isTransparent=false;
//添加Handler，在CEFAPP状态为终止时退出程序
CefApp.addAppHandler(new CefAppHandlerAdapter(null) {
@Override
public void stateHasChanged(org.cef.CefApp.CefAppState state) {
// Shutdown the app if the native CEF part is terminated
if (state == CefAppState.TERMINATED) System.exit(0);
}
});
CefSettings settings = new CefSettings();
settings.windowless_rendering_enabled = useOSR;
//获取CefApp实例
cefApp=CefApp.getInstance(settings);
//创建客户端实例
cefClient = cefApp.createClient();
//添加鼠标右键菜单handler
cefClient.addContextMenuHandler(new MenuHandler());
//添加浏览器标题更改handler
cefClient.addDisplayHandler(new DisplayHandler(this));
//添加浏览器窗口弹出handler
cefClient.addLifeSpanHandler(new LifeSpanHandler(this));
tabbedPane=new JTabbedPane(JTabbedPane.TOP,JTabbedPane.SCROLL_TAB_LAYOUT);
getContentPane().add(tabbedPane, BorderLayout.CENTER);
pack();
setTitle("测试JCEF-Tab栏");
setSize(800, 600);
setVisible(true);
//添加一个窗口关闭监听事件
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
closeAllBrowser();
CefApp.getInstance().dispose();
dispose();
}
});
createBrowser("http://www.baidu.com");
}
/**
* 关闭所有浏览器
* @author:liuming
*/
public void closeAllBrowser() {
for(int i=tbList.size()-1;i>=0;i--) {
TabBrowser tb=tbList.get(i);
tb.getBrowser().close(true);
tabbedPane.removeTabAt(i);
System.out.println("移除索引为"+i+"的tab...");
}
}
/**
* 根据url创建一个新的tab页
* @author:liuming
* @param url
* @return 最后一个tab的索引
*/无锡人流医院哪家好 http://www.bhnnkyy120.com/
public int createBrowser(String url) {
CefBrowser browser = cefClient.createBrowser(url, useOSR, isTransparent);
tabbedPane.addTab(".", browser.getUIComponent());
int lastIndex=tabbedPane.getTabCount()-1;
tbIndex++;
//创建自定义tab栏
JPanel jp=new JPanel();
JLabel ltitle=new JLabel(TITLE_INFO);
JLabel lclose=new JLabel("X");
jp.setOpaque(false);
ltitle.setHorizontalAlignment(JLabel.LEFT);
lclose.setHorizontalAlignment(JLabel.RIGHT);
jp.add(ltitle);
jp.add(lclose);
//添加关闭按钮监听事件
lclose.addMouseListener(new TabCloseListener(tbIndex,this));
//设置tab栏标题的关键句
tabbedPane.setTabComponentAt(lastIndex, jp);
TabBrowser tb=new TabBrowser(tbIndex, browser, ltitle);
tbList.add(tb);
tabbedPane.setSelectedIndex(lastIndex);
return lastIndex;
}
/**
* 修改标题
* @author:liuming
* @param browser
* @param title
*/
public void updateTabTitle(CefBrowser browser,String title) {
if(title!=null && !"".equals(title)) {
if(title.length()>12) title=title.substring(0, 12)+"...";
for(TabBrowser tb:tbList) {
if(tb.getBrowser()==browser) {
tb.getTitle().setText(title);
break;
}
}
}
}
/**
* 移除tab
* @author:liuming
* @param browser
* @param index
*/
public void removeTab(CefBrowser browser,int index) {
if(browser!=null) {
for(int i=0;i
TabBrowser tb=tbList.get(i);
if(tb.getBrowser()==browser) {
tb.getBrowser().close(true);
tabbedPane.removeTabAt(i);
tbList.remove(i);
// System.out.println("移除索引为"+i+"的tab");
break;
}
}
}else {
for(int i=0;i
TabBrowser tb=tbList.get(i);
if(tb.getIndex()==index) {
tb.getBrowser().close(true);
tabbedPane.removeTabAt(i);
tbList.remove(i);
// System.out.println("移除索引为"+i+"的tab");
break;
}
}
}
}
public static void main(String[] args) {
new TabbedPaneTestFrame("http://www.baidu.com");
}
}
