java - 在 JTextField 内部删除不适用于新的 BasicLookAndFeel

Question

如果您为应用程序应用新的(基本)LookAndFeel，我很惊讶地发现 JTextField 停止响应删除操作。

下面是完整的代码:

import javax.swing.*;
import javax.swing.plaf.ColorUIResource;
import javax.swing.plaf.basic.BasicLookAndFeel;
import java.awt.*;
import java.util.logging.Logger;

public class App2 {
     private static final Logger log =  Logger.getLogger(App2.class.getCanonicalName());

     public static void main(String args[]){
         setUI();

         JFrame f = new JFrame();

         JTextField tf = new JTextField();
         f.add(tf);



         f.setSize(300, 300);
         f.setVisible(true);
           f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
     }

  static void setUI(){
       try {
            javax.swing.UIManager.setLookAndFeel(new DummyLookAndFeel());
       } catch ( UnsupportedLookAndFeelException ex) {
             log.warning("Setting UI not ok : " + ex.getMessage());
       }
   }
}

class DummyLookAndFeel extends BasicLookAndFeel {
     @Override
     protected void initComponentDefaults(UIDefaults table) {
         table.put("TextField.background", new ColorUIResource(Color.RED));
     }

     @Override
     public String getName() {
         return "Just a fancy name";
     }

     @Override
     public String getID() {
         return "Something unique";
     }

     @Override
     public String getDescription() {
         return "A very very long description";
     }

     @Override
     public boolean isNativeLookAndFeel() {
         return false;
     }

     @Override
     public boolean isSupportedLookAndFeel() {
         return true;
     }
 }

知道为什么会发生吗？

Answer 1

看来如果我将 initComponentDefaults(...) 更改为

protected void initComponentDefaults(UIDefaults table) {
  super.initComponentDefaults(table);

  Object fim = table.get("TextField.focusInputMap");

  Object fieldInputMap = new UIDefaults.LazyInputMap(new Object[] {
                     "ctrl C", DefaultEditorKit.copyAction,
                     "ctrl V", DefaultEditorKit.pasteAction,
                     "ctrl X", DefaultEditorKit.cutAction,
                       "COPY", DefaultEditorKit.copyAction,
                      "PASTE", DefaultEditorKit.pasteAction,
                        "CUT", DefaultEditorKit.cutAction,
             "control INSERT", DefaultEditorKit.copyAction,
               "shift INSERT", DefaultEditorKit.pasteAction,
               "shift DELETE", DefaultEditorKit.cutAction,
                 "shift LEFT", DefaultEditorKit.selectionBackwardAction,
              "shift KP_LEFT", DefaultEditorKit.selectionBackwardAction,
                "shift RIGHT", DefaultEditorKit.selectionForwardAction,
             "shift KP_RIGHT", DefaultEditorKit.selectionForwardAction,
                  "ctrl LEFT", DefaultEditorKit.previousWordAction,
               "ctrl KP_LEFT", DefaultEditorKit.previousWordAction,
                 "ctrl RIGHT", DefaultEditorKit.nextWordAction,
              "ctrl KP_RIGHT", DefaultEditorKit.nextWordAction,
            "ctrl shift LEFT", DefaultEditorKit.selectionPreviousWordAction,
         "ctrl shift KP_LEFT", DefaultEditorKit.selectionPreviousWordAction,
           "ctrl shift RIGHT", DefaultEditorKit.selectionNextWordAction,
        "ctrl shift KP_RIGHT", DefaultEditorKit.selectionNextWordAction,
                     "ctrl A", DefaultEditorKit.selectAllAction,
                       "HOME", DefaultEditorKit.beginLineAction,
                        "END", DefaultEditorKit.endLineAction,
                 "shift HOME", DefaultEditorKit.selectionBeginLineAction,
                  "shift END", DefaultEditorKit.selectionEndLineAction,
                 "BACK_SPACE", DefaultEditorKit.deletePrevCharAction,
           "shift BACK_SPACE", DefaultEditorKit.deletePrevCharAction,
                     "ctrl H", DefaultEditorKit.deletePrevCharAction,
                     "DELETE", DefaultEditorKit.deleteNextCharAction,
                "ctrl DELETE", DefaultEditorKit.deleteNextWordAction,
            "ctrl BACK_SPACE", DefaultEditorKit.deletePrevWordAction,
                      "RIGHT", DefaultEditorKit.forwardAction,
                       "LEFT", DefaultEditorKit.backwardAction,
                   "KP_RIGHT", DefaultEditorKit.forwardAction,
                    "KP_LEFT", DefaultEditorKit.backwardAction,
                      "ENTER", JTextField.notifyAction,
            "ctrl BACK_SLASH", "unselect"/*DefaultEditorKit.unselectAction*/,
             "control shift O", "toggle-componentOrientation"/*DefaultEditorKit.toggleComponentOrientation*/
  });

  table.put("TextField.focusInputMap", fieldInputMap);


  table.put("TextField.background", new ColorUIResource(Color.RED));
}

JTextField 似乎正在工作。似乎 UIDefaults 没有“TextField.focusInputMap”条目(在示例中 fim 对象为空)