Question

根据可访问性要求， Shift + F10 应该打开右键单击上下文菜单。

在Swing中，一种方法是只将键绑定添加到您创建的每个组件。但是，我已经尝试扩展EventQueue以处理所有 Shift + F10 按下。特别是，我重写了dispatchEvent（AWTEvent），将 Shift + F10 KeyEvents转换为右键单击mousePresses：

protected void dispatchEvent(AWTEvent event) {
    if (event instanceof KeyEvent) {
        KeyEvent ev = (KeyEvent) event;
        if ((ev.getKeyCode() == KeyEvent.VK_F10) && 
                    (ev.getModifiersEx() & InputEvent.SHIFT_DOWN_MASK) > 0) {
            KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
            Component comp = kfm.getFocusOwner();
            Point mouse = MouseInfo.getPointerInfo().getLocation();
            SwingUtilities.convertPointFromScreen(mouse, comp);

            eventToDispatch = new MouseEvent(comp,
                            MouseEvent.MOUSE_RELEASED, ev.getWhen(), 0, mouse.x, mouse.y, 
                            1, true);
        }
   }
}

但是，这可以防止 Shift + F10 关闭任何启动的JPopupMenus。不知道这个解决方案是否可行，或者是否有更好的方法来满足这一要求？

Answer 1

ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        try {
          int dotPosition = textField.getCaretPosition();
          Rectangle popupLocation = textField
              .modelToView(dotPosition);
          popup.show(textField, popupLocation.x, popupLocation.y);
        } catch (BadLocationException badLocationException) {
          System.out.println("Oops");
        }
      }
    };
    KeyStroke keystroke = KeyStroke.getKeyStroke(KeyEvent.VK_F10,
        InputEvent.SHIFT_MASK);
    textField.registerKeyboardAction(actionListener, keystroke,
        JComponent.WHEN_FOCUSED);

Java Swing Shift + F10辅助功能

1 个答案: