ComponentView在顶部有不必要的额外插图

问题描述

我在创建需要ComponentViews的自定义文档时遇到了麻烦（因为我想使用常规的swing组件侦听器）。

当前是这样的：

显然，额外的填充（或者，我发现，父母的minorInset内部的minorInset）是错误的，并且将整个组件向下移动了几个像素，准确地说是6个像素。

我正在添加组件，如下所示：

public class InlineLabelTest extends JFrame {

    public InlineLabelTest() {
        try {
            final JTextPane textPane = new JTextPane();
            textPane.setEditorKit(new InlineLabelKit());

            final LabelDocument document = (LabelDocument) textPane.getDocument();
            document.insertString(0, "Lorem ipsum", new SimpleAttributeSet());
            document.insertLabel(document.getLength(), "dateAndTime");

            setLayout(new BorderLayout());
            add(new JScrollPane(textPane));

        } catch (BadLocationException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new InlineLabelTest().setVisible(true));
    }


    private static class InlineLabelKit extends StyledEditorKit {
        private LabelViewFactory factory;


        @Override
        public ViewFactory getViewFactory() {
            if (factory == null) {
                factory = new LabelViewFactory();
            }

            return factory;
        }

        @Override
        public Document createDefaultDocument() {
            return new LabelDocument();
        }

    }

    private static class LabelDocument extends DefaultStyledDocument {

        public void insertLabel(int offset, String label) {
            final ArrayList<ElementSpec> specs = new ArrayList<>();
            final JButton flag = new JButton(label);

            // The combination of the border and the font adds the inset
            flag.setBorder(BorderFactory.createLineBorder(Color.ORANGE));
            flag.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 10));

            final SimpleAttributeSet inner = new SimpleAttributeSet();
            StyleConstants.setComponent(inner, flag);

            specs.add(new ElementSpec(inner, ElementSpec.StartTagType));
            specs.add(new ElementSpec(inner, ElementSpec.ContentType, label.toCharArray(), 0, label.length()));
            specs.add(new ElementSpec(inner, ElementSpec.EndTagType));

            try {
                insert(offset, specs.toArray(new ElementSpec[specs.size()]));

            } catch (BadLocationException e) {
                e.printStackTrace();
            }
        }
    }

    private static class LabelViewFactory implements ViewFactory {

        @Override
        public View create(Element elem) {
            switch (elem.getName()) {
                case AbstractDocument.SectionElementName: return new BoxView(elem, View.Y_AXIS);
                case AbstractDocument.ParagraphElementName: return new ParagraphView(elem);
                case StyleConstants.ComponentElementName: return new ComponentView(elem);
                case StyleConstants.IconElementName: return new IconView(elem);
                default: return new LabelView(elem);
            }
        }

    }

}

好像是自定义边框和字体（或任何影响其默认大小的更改）的组合创建了插图。

如何摆脱多余的填充物？ 为什么系统甚至在ComponentView周围添加BoxView？ 我有什么想念的吗？

提前非常感谢！