java - 箭头键在自定义搜索组件中不起作用

Question

我正在开发自定义搜索组件。单击文本字段内的按钮(搜索图像图标)时，将显示一个表格。该代码处于非常初级的阶段，所以很多东西都不存在。

到目前为止，我卡住了，因为我无法使用箭头键在表格中导航。一旦我在表格中选择了一行，我也无法使用“tab”键移动到下一个文本字段。

该组件的目标是从表格中选择一行，然后在支持方法(尚未编写)的帮助下，其他标签和文本字段的值将被默认，同时默认文本中的第一列值它附加到的字段。

非常感谢您的帮助。谢谢!!

    package myTableCombo;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JWindow;
import javax.swing.ListSelectionModel;
import javax.swing.RowFilter;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.plaf.basic.BasicArrowButton;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;

public class SearchBox extends JPanel {

        private static final long serialVersionUID = 1L;
        private JTextField editor;
        private JButton arrowButton;
        private JWindow jWindow;
        private Component userComponent;

        public SearchBox() {
                super(new FlowLayout(FlowLayout.LEFT, 0, 0));
                editor = new JTextField();
                editor.setPreferredSize(new Dimension(250, 25));
                initialize();
                addListeners();
                setBorders();
        }

        private void addListeners() {
                arrowButton.addActionListener(new ActionListener() {
                        public void actionPerformed(ActionEvent e) {
                                showWindow();
                        }
                });
        }

        protected void showWindow() {
                if (null != getWindowComponent()) {
                        jWindow = new JWindow();
                        jWindow.getContentPane().add(getWindowComponent());
                        jWindow.setLocation(new Point(SearchBox.this.getLocationOnScreen().x, SearchBox.this.getLocationOnScreen().y + 25));
                        jWindow.pack();
                        jWindow.setVisible(true);
                }
        }

        private Component getWindowComponent() {
                return userComponent;
        }

        public void setWindowComponent(Component component) {
                userComponent = component;
        }

        private void initialize() {
                arrowButton = new BasicArrowButton(SwingConstants.SOUTH);//In my code there is an icon here
                arrowButton.setBorder(null);
                arrowButton.setContentAreaFilled(false);
        }

        private void setBorders() {
                add(editor);
                add(arrowButton);
                setBackground(editor.getBackground());
                setBorder(editor.getBorder());
                editor.setBorder(null);
        }

        public JTextField getTextComponent() {
                return editor;
        }

        public JButton getActionButton() {
                return arrowButton;
        }

        public static void main(String args[]) {
                EventQueue.invokeLater(new Runnable() {
                        @Override
                        public void run() {
                                createAndShowGUI();
                        }
                });
        }

        protected static void createAndShowGUI() {
                JFrame frame = new JFrame();
                JPanel panel = new JPanel();

                frame.setPreferredSize(new Dimension(500, 400));
                frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

                panel.add(new JLabel("Test Table Combo"));
                SearchBox searchBox = new SearchBox();
                searchBox.userComponent = searchBox.new SearchBoxTable();
                panel.add(searchBox);

                frame.getContentPane().add(panel);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
        }

        private class SearchBoxTable extends JScrollPane implements DocumentListener {

                private static final long serialVersionUID = 1L;
                private JTable table;
                private Object[] columnNames;
                private DefaultTableModel tableModel;
                private Object[][] sheetDataInString;
                private TableRowSorter<DefaultTableModel> rowSorter;

                public SearchBoxTable() {
                        columnNames = new Object[]{"Column 1", "Column 2", "Column 3", "Column 4", "Column 5", "Column 6"};
                        sheetDataInString = new Object[21][6];
                        for(int i =0; i < sheetDataInString.length; i++) {
                                for(int j = 0; j< 6; j++) {
                                        sheetDataInString[i][j] = "Row Value : " + i + ", Column Value : " + j;
                                }
                        }

                        tableModel = new DefaultTableModel(sheetDataInString, columnNames) {
                                private static final long serialVersionUID = 1L;

                                @Override
                                public boolean isCellEditable(int row, int column) {
                                        return false;
                                }
                        };
                        rowSorter = new TableRowSorter<DefaultTableModel>(tableModel);

                        table = new JTable(tableModel);
                        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
                        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
                        table.setAutoCreateRowSorter(true);
                        table.setFillsViewportHeight(true);
                        table.getTableHeader().setFont(new Font(null, Font.PLAIN, 13));

                        setPreferredSize(new Dimension(500, 225));
                        setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
                        setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
                        getViewport().add(table);
                }

                @Override
                public void changedUpdate(DocumentEvent e) {
                        newFilter(e);
                }

                @Override
                public void insertUpdate(DocumentEvent e) {
                        newFilter(e);
                }

                @Override
                public void removeUpdate(DocumentEvent e) {
                        newFilter(e);
                }

                /**
                 * Update the row filter regular expression from the expression/string/data in the text box.
                 * 
                 * @param documentEvent
                 */
                private void newFilter(DocumentEvent documentEvent) {
                        RowFilter<DefaultTableModel, Object> rowFilter = null;
                        Document document = documentEvent.getDocument();
                        String filterText;

                        try {
                                filterText = document.getText(0, document.getLength()).trim();
                                rowFilter = RowFilter.regexFilter("(?i)" + filterText);
                        } catch (java.util.regex.PatternSyntaxException e) {
                                return;
                        } catch (BadLocationException badLocationException) {
                                return;
                        }
                        rowSorter.setRowFilter(rowFilter);
                        table.setRowSorter(rowSorter);

                }

        }

}

Answer 1

你是什么意思

• 使用未修饰的 JDialog 而不是 JWindow，否则 JTextComponets 不可编辑

• JDialog 更好地支持 AlwaysOnTop 和 ModalityTypes(仅硬编码到 setAlwaysOnTop)

• 不要一次又一次地重新创建基本设置，不要重新创建弹出窗口，使用lolac变量，删除所有内容并添加一个新的ony，为JDialog定义一次所有设置，参见异常(对话框是可显示的。)在弹出窗口被隐藏且 JTextField 中的值不为空的情况下

• ESC 键事件 上隐藏JDialog 的错过操作，隐藏JDialog，如果是JFrame最小化

• 如果调整了 JFrame 的大小，则错过了使用 JDialog 移动，在另一个 Point 上移动到屏幕上，

• 将 Document 直接附加到 JTextField，而不是丢失到 JScrollPane 定义的某处

• 你的 code missing a few good practicie s，那么一切皆有可能，但不能使用此代码(在我编辑之后)

• 搜索 Kay Toedter 的 JCalendar(我在弹出窗口中看到的最佳弹出解决方法)

只删除了一些有用的方法，从 - 移动到，注意 non_optimized_code，简单地放入 recyclebin 并再次写入

import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.RowFilter;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.plaf.basic.BasicArrowButton;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;

public class SearchBox extends JPanel {

    private static final long serialVersionUID = 1L;
    private static JFrame frame = new JFrame();
    private JTextField editor;
    private JButton arrowButton;
    //private JToggleButton arrowButton;
    private JDialog popupWindow = new JDialog(frame);
    private Component userComponent;
    private JTable table;
    private TableRowSorter<DefaultTableModel> rowSorter;
    private Object[] columnNames;
    private DefaultTableModel tableModel;
    private Object[][] sheetDataInString;

    public SearchBox() {
        super(new FlowLayout(FlowLayout.LEFT, 0, 0));
        editor = new JTextField();
        editor.setPreferredSize(new Dimension(250, 25));
        editor.getDocument().addDocumentListener(new DocumentListener() {

            @Override
            public void changedUpdate(DocumentEvent e) {
                newFilter();
            }

            @Override
            public void insertUpdate(DocumentEvent e) {
                newFilter();
            }

            @Override
            public void removeUpdate(DocumentEvent e) {
                newFilter();
            }

            private void newFilter() {
                RowFilter<DefaultTableModel, Object> rowFilter = null;
                Document document = editor.getDocument();
                String filterText;
                try {
                    filterText = document.getText(0, document.getLength()).trim();
                    rowFilter = RowFilter.regexFilter("(?i)" + filterText);
                } catch (java.util.regex.PatternSyntaxException e) {
                    return;
                } catch (BadLocationException badLocationException) {
                    return;
                }
                rowSorter.setRowFilter(rowFilter);
                table.setRowSorter(rowSorter);
            }
        });
        initialize();
        addListeners();
        setBorders();
    }

    private void addListeners() {
        arrowButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (!popupWindow.isVisible()) {
                    showWindow();
                } else {
                    hideWindow();
                }
            }
        });
    }

    protected void showWindow() {
        if (null != getWindowComponent()) {
            popupWindow.getContentPane().add(getWindowComponent());
            popupWindow.setLocation(new Point(SearchBox.this.getLocationOnScreen().x, SearchBox.this.getLocationOnScreen().y + 25));
            popupWindow.setUndecorated(true);
            popupWindow.setAlwaysOnTop(true);
            popupWindow.pack();
            SwingUtilities.invokeLater(new Runnable() {

                @Override
                public void run() {
                    popupWindow.setVisible(true);
                }
            });
        }
    }

    protected void hideWindow() {
        popupWindow.setVisible(false);
    }

    private Component getWindowComponent() {
        return userComponent;
    }

    public void setWindowComponent(Component component) {
        userComponent = component;
    }

    private void initialize() {
        arrowButton = new BasicArrowButton(SwingConstants.SOUTH);//In my code there is an icon here
        arrowButton.setBorder(null);
        arrowButton.setContentAreaFilled(false);
    }

    private void setBorders() {
        add(editor);
        add(arrowButton);
        setBackground(editor.getBackground());
        setBorder(editor.getBorder());
        editor.setBorder(null);
    }

    public JTextField getTextComponent() {
        return editor;
    }

    public JButton getActionButton() {
        return arrowButton;
    }

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }

    protected static void createAndShowGUI() {
        JPanel panel = new JPanel();

        frame.setPreferredSize(new Dimension(500, 400));
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        panel.add(new JLabel("Test Table Combo"));
        SearchBox searchBox = new SearchBox();
        searchBox.userComponent = searchBox.new SearchBoxTable();
        panel.add(searchBox);

        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private class SearchBoxTable extends JScrollPane {

        private static final long serialVersionUID = 1L;

        public SearchBoxTable() {
            columnNames = new Object[]{"Column 1", "Column 2", "Column 3", "Column 4", "Column 5", "Column 6"};
            sheetDataInString = new Object[21][6];
            for (int i = 0; i < sheetDataInString.length; i++) {
                for (int j = 0; j < 6; j++) {
                    sheetDataInString[i][j] = "Row Value : " + i + ", Column Value : " + j;
                }
            }

            tableModel = new DefaultTableModel(sheetDataInString, columnNames) {

                private static final long serialVersionUID = 1L;

                @Override
                public boolean isCellEditable(int row, int column) {
                    return true;
                }
            };
            rowSorter = new TableRowSorter<DefaultTableModel>(tableModel);
            table = new JTable(tableModel);
            table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            table.setAutoCreateRowSorter(true);
            table.setFillsViewportHeight(true);
            table.getTableHeader().setFont(new Font(null, Font.PLAIN, 13));
            table.setPreferredScrollableViewportSize(table.getPreferredSize());
            setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
            setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
            getViewport().add(table);
        }
    }
}