Question

我正在为文件浏览器构建GUI，它将显示文件和文件。目录内的文件夹。 File Explorer with TopBar(JPanel) on top, TabPane(JTabbedPane) on lower right, and LeftPanel(JPanel) on lower left

顶部的

'+'按钮为jtabbedpane添加了新标签，'＆lt;'顶部的按钮返回到父文件夹，leftPanel用于快捷方式。我使用JList来显示文件和文件夹。这个jlist被添加到JScrollPane，然后添加到JTabbedpane。

现在出现问题，当我添加新标签然后切换到其他标签但由'＆lt;'所做的更改时button和leftPanel仅在最后一个选项卡上执行。我需要找到一个解决方案，我可以告诉'＆lt;'后退按钮仅在选定的选项卡上进行更改。我怎么能实现这个目标？我正在分享一些课程的代码。 FilesInTheJList.java是用于在jtabbedpane中显示文件的类。

LeftPanel.java

public class LeftPanel extends JPanel
{

public  JList<Object> leftList;
public static DefaultListModel<Object> listModel;
private static final long serialVersionUID = 1L;

public LeftPanel(TabPane tabbedPane){
    leftList = new JList<Object>();
    String leftNamesString[] = {"Downloads","Desktop", "Documents", "Pictures", "Movies", "Users", "Sharing"};
    listModel = new DefaultListModel<Object>();
    for (String list: leftNamesString) {
        listModel.addElement(list);
    }
    leftList.setModel(listModel);
    leftList.setFixedCellHeight(30);
    leftList.setFixedCellWidth(150);
    leftList.setFont(new Font("SansSerif",Font.PLAIN,16));
    leftList.setBorder(BorderFactory.createMatteBorder(10, 5, 5, 0, Color.WHITE));
    leftList.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
    leftList.setCellRenderer(new MyCellRenderer());
    addAction(tabbedPane);
    listRoots();
}
public void listRoots() {
    File[] paths;
    paths = File.listRoots();
    for(File path:paths)
    {
        listModel.addElement(path.toString());
    }
    leftList.invalidate();
    leftList.repaint();

}
public void addAction(TabPane tabbedPane){
    leftList.addMouseListener(new MouseListener() {

        @Override
        public void mousePressed(MouseEvent e) {
            String home = System.getProperty("user.home");
            switch(leftList.getSelectedValue().toString()){
            case "Downloads":
                    tabbedPane.showFilesInTheJList.repaintList(home+"/Downloads/");
                break;
            case "Desktop":
                    tabbedPane.showFilesInTheJList.repaintList(home+"/Desktop/");

                break;
            case "Documents":
                tabbedPane.showFilesInTheJList.repaintList(home+"/Documents/");

                break;
            case "Pictures":
                    tabbedPane.showFilesInTheJList.repaintList(home+"/Pictures/");
                break;
            case "Movies":
                    tabbedPane.showFilesInTheJList.repaintList(home+"/Movies/");

                break;
            case "Users":
                    tabbedPane.showFilesInTheJList.repaintList("/Users/");

                break;
            case "Sharing":
                @SuppressWarnings("unused")
                SharingGui openSharingGui = new SharingGui();
                break;
            default:
                tabbedPane.showFilesInTheJList.repaintList(leftList.getSelectedValue().toString());
                break;
            }
        }
        //other empty mouse pressed/released methods
    });
}
private static class MyCellRenderer extends JLabel implements ListCellRenderer<Object> {

    //not so important stuff
}
}

tabpane.java

public class TabPane extends JTabbedPane{

private static final long serialVersionUID = 1L;
private String pathString;
public FilesInTheJList showFilesInTheJList;

TabPane()
{
    setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
    pathString = "/Users/jaspreet/Downloads/";
}
public void addTabs() 
{
    if (getTabCount() == 0) {
        showFilesInTheJList = new FilesInTheJList();
        showFilesInTheJList.paintList(pathString);
        addTab(showFilesInTheJList.parentDirName, new JScrollPane(showFilesInTheJList.list));
    }
    else {
        showFilesInTheJList = new FilesInTheJList();
        showFilesInTheJList.paintList(pathString);
        insertTab(showFilesInTheJList.parentDirName, null,new JScrollPane(showFilesInTheJList.list), showFilesInTheJList.parentDirName, getTabCount());
        initTabComponent(getTabCount()-1);
    }
}
private void initTabComponent(int i) {
    this.setTabComponentAt(i, new ButtonTabComponent(this));
}
}

从splitpane.java

调用它们

splitpane.java

public class SplitPane extends JPanel
{
private static final long serialVersionUID = 1L;

public JSplitPane splitPane;
public TabPane tabbedPane;

SplitPane(){
    tabbedPane = new TabPane();
    tabbedPane.addTabs();

    LeftPanel leftSplit = new LeftPanel(tabbedPane);
    splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,new JScrollPane(leftSplit.leftList), tabbedPane);
    splitPane.setOneTouchExpandable(true);
    splitPane.setContinuousLayout(true);
}
}

jtabbedpane选项卡的自定义行为

0 个答案: