Java 使用包含可编辑JTextArea的JPanel渲染JTree叶

我试图渲染一个JTree叶子，使其具有一个包含可编辑JTextArea的JPanel，以便用户可以键入文本并在添加文本时向下滚动

还使用包装器限制文本的宽度，使其向下延伸以允许更多的空间，而不是左右滚动

到目前为止，我已经实现了以下内容，但是当我运行代码时，它看起来很奇怪，好像有两个leaf，默认的和渲染的。任何类型的帮助都是非常感谢的

我只是想知道我想做的事情是否可以实现，如果不能，我可以在哪里修改

我不想改变图标，只是叶子而已

import java.awt.Component;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.ItemEvent;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;

/**
 *
 * @author Razaractor
 */
class LeafRenderer extends AbstractCellEditor implements
        TreeCellRenderer, TreeCellEditor {

    //Text area to be place on JPanel
    JTextArea text = new JTextArea();
    DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();

    @Override
    public Object getCellEditorValue() {
        return text.getText();
    }

    @Override
    public boolean isCellEditable(final EventObject event) {
        return true;
    }

    @Override
    public Component getTreeCellRendererComponent(
            final JTree tree, final Object value,
            final boolean selected,
            final boolean expanded,
            final boolean leaf,
            final int row,
            final boolean hasFocus) {
        //Default leaf
        Component render = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, selected, expanded, leaf, row, hasFocus);
        if (selected && leaf) {
            final JPanel panel = new JPanel();
            BoxLayout layout = new BoxLayout(panel, BoxLayout.X_AXIS);
            panel.setLayout(layout);
            text.setColumns(20);
            text.setLineWrap(true);
            text.setRows(5);
            text.setWrapStyleWord(true);
            text = new JTextArea(String.valueOf(value));
            text.addComponentListener(new ComponentListener() {

                @Override
                public void componentResized(ComponentEvent e) {
                    panel.setSize(panel.getPreferredSize());
                }

                @Override
                public void componentShown(ComponentEvent e) {
                }

                @Override
                public void componentMoved(ComponentEvent e) {
                }

                @Override
                public void componentHidden(ComponentEvent e) {
                }
            });
            JScrollPane scroll = new JScrollPane(text);
            panel.add(scroll);
            render = panel;
            return panel;
        }
        return render;
    }

    @Override
    public Component getTreeCellEditorComponent(
            final JTree tree,
            final Object value,
            final boolean isSelected,
            final boolean expanded,
            final boolean leaf,
            final int row) {
        Component editor = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, true, expanded, leaf, row, true);
        final JPanel p = new JPanel();
        if (editor instanceof JPanel) {
            editor = (JPanel) editor;
        }
        return editor;
    }

    public void itemStateChanged(ItemEvent itemEvent) {
        if (stopCellEditing()) {
            fireEditingStopped();
        }
    }
}

---

我不知道您真正想要实现什么，但请尝试这些更改

import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.ItemEvent;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;

/**
 *
 * @author Razaractor
 */
class LeafRenderer extends AbstractCellEditor implements
        TreeCellRenderer, TreeCellEditor {

    //Text area to be place on JPanel
    JTextArea text = new JTextArea();
    DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();

    @Override
    public Object getCellEditorValue() {
        return text.getText();
    }

    @Override
    public boolean isCellEditable(final EventObject event) {
        return true;
    }

    @Override
    public Component getTreeCellRendererComponent(
            final JTree tree, final Object value,
            final boolean selected,
            final boolean expanded,
            final boolean leaf,
            final int row,
            final boolean hasFocus) {
        //Default leaf
        Component render = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, selected, expanded, leaf, row, hasFocus);
        if (selected && leaf) {
            final JPanel panel = new JPanel();
            BoxLayout layout = new BoxLayout(panel, BoxLayout.X_AXIS);
            panel.setLayout(layout);
            //Changed code
            //moved from
            text = new JTextArea(String.valueOf(value));
            text.setColumns(20);
            text.setLineWrap(true);
            text.setRows(5);
            text.setWrapStyleWord(true);
            //here. You were creating just ordinary JTextArea.
            text.addComponentListener(new ComponentListener() {

                @Override
                public void componentResized(ComponentEvent e) {
                    panel.setSize(panel.getPreferredSize());
                }

                @Override
                public void componentShown(ComponentEvent e) {
                }

                @Override
                public void componentMoved(ComponentEvent e) {
                }

                @Override
                public void componentHidden(ComponentEvent e) {
                }
            });
            JScrollPane scroll = new JScrollPane(text);
            //changed Code
            //if you want to hide scrollbars uncomment one of these
            //scroll.getVerticalScrollBar().setPreferredSize(new Dimension(0, 0));
            //scroll.getHorizontalScrollBar().setPreferredSize(new Dimension(0, 0));
            panel.add(scroll);
            render = panel;
            return panel;
        }
        return render;
    }

    @Override
    public Component getTreeCellEditorComponent(
            final JTree tree,
            final Object value,
            final boolean isSelected,
            final boolean expanded,
            final boolean leaf,
            final int row) {
        Component editor = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, true, expanded, leaf, row, true);
        final JPanel p = new JPanel();
        if (editor instanceof JPanel) {
            editor = (JPanel) editor;
        }
        return editor;
    }

    public void itemStateChanged(ItemEvent itemEvent) {
        if (stopCellEditing()) {
            fireEditingStopped();
        }
    }
}

---

我不知道你真正想要实现什么，但是试试这些改变

import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.ItemEvent;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;

/**
 *
 * @author Razaractor
 */
class LeafRenderer extends AbstractCellEditor implements
        TreeCellRenderer, TreeCellEditor {

    //Text area to be place on JPanel
    JTextArea text = new JTextArea();
    DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();

    @Override
    public Object getCellEditorValue() {
        return text.getText();
    }

    @Override
    public boolean isCellEditable(final EventObject event) {
        return true;
    }

    @Override
    public Component getTreeCellRendererComponent(
            final JTree tree, final Object value,
            final boolean selected,
            final boolean expanded,
            final boolean leaf,
            final int row,
            final boolean hasFocus) {
        //Default leaf
        Component render = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, selected, expanded, leaf, row, hasFocus);
        if (selected && leaf) {
            final JPanel panel = new JPanel();
            BoxLayout layout = new BoxLayout(panel, BoxLayout.X_AXIS);
            panel.setLayout(layout);
            //Changed code
            //moved from
            text = new JTextArea(String.valueOf(value));
            text.setColumns(20);
            text.setLineWrap(true);
            text.setRows(5);
            text.setWrapStyleWord(true);
            //here. You were creating just ordinary JTextArea.
            text.addComponentListener(new ComponentListener() {

                @Override
                public void componentResized(ComponentEvent e) {
                    panel.setSize(panel.getPreferredSize());
                }

                @Override
                public void componentShown(ComponentEvent e) {
                }

                @Override
                public void componentMoved(ComponentEvent e) {
                }

                @Override
                public void componentHidden(ComponentEvent e) {
                }
            });
            JScrollPane scroll = new JScrollPane(text);
            //changed Code
            //if you want to hide scrollbars uncomment one of these
            //scroll.getVerticalScrollBar().setPreferredSize(new Dimension(0, 0));
            //scroll.getHorizontalScrollBar().setPreferredSize(new Dimension(0, 0));
            panel.add(scroll);
            render = panel;
            return panel;
        }
        return render;
    }

    @Override
    public Component getTreeCellEditorComponent(
            final JTree tree,
            final Object value,
            final boolean isSelected,
            final boolean expanded,
            final boolean leaf,
            final int row) {
        Component editor = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, true, expanded, leaf, row, true);
        final JPanel p = new JPanel();
        if (editor instanceof JPanel) {
            editor = (JPanel) editor;
        }
        return editor;
    }

    public void itemStateChanged(ItemEvent itemEvent) {
        if (stopCellEditing()) {
            fireEditingStopped();
        }
    }
}

---

有三种选择1）发布一个关于JTree的问题，然后你可以继续编辑，2）发布一个演示你的问题3）随它去吧，然后我们也可以，但可能是晴天霹雳：-）@Keppil，thanx作为建议，我刚刚设法发布了它。@mKorbel，我会选择选项2：^DSee也是，它实现了

TreeCellEditor

。有三种选择1）发布一个关于JTree的问题，然后你可以继续编辑，2）发布一个演示你的问题3）随它去吧，然后我们也可以，但可能是晴天霹雳：-）Keppil，thanx作为建议，我刚刚设法发布了它。@mKorbel，我会选择选项2：^DSee也是，它实现了

TreeCellEditor

。我的目标是让一个带有JTextArea的JPanel替换JTree的默认可编辑叶。所以我不确定我正在实施的是实现我想要的东西所需要的。对于滚动条的修正，现在已经有了。我想返回一个包含JTextArea的JPanel，允许用户通过结束行上下滚动限制文本，这样它就不会是长的水平行。我刚刚设法摆脱了默认的叶子外观，我删除了所选条件，现在只有叶子。现在我有了我想要的叶子，就像我发布的第二张图片一样，我在JTextArea中输入文本时遇到问题，因此它使用包装器结束行，但它仍然使用默认的编辑器输入样式，即它不结束行。我该怎么做呢？感谢您尝试在面板中将JTree设置为可编辑（JTree.setEditable（true））和JTextArea设置为可聚焦（text.setFocusable（true））我已经将JTree设置为可编辑，我尝试了setFocusable（true），但它仍然没有响应，我可能会尝试requestFocus（），thanx RisoMy的目标是让一个带有JTextArea的JPanel替换JTree的默认可编辑叶。所以我不确定我正在实施的是实现我想要的东西所需要的。对于滚动条的修正，现在已经有了。我想返回一个包含JTextArea的JPanel，允许用户通过结束行上下滚动限制文本，这样它就不会是长的水平行。我刚刚设法摆脱了默认的叶子外观，我删除了所选条件，现在只有叶子。现在我有了我想要的叶子，就像我发布的第二张图片一样，我在JTextArea中输入文本时遇到问题，因此它使用包装器结束行，但它仍然使用默认的编辑器输入样式，即它不结束行。我该怎么做呢？感谢您尝试在面板中将JTree设置为可编辑（JTree.setEditable（true））和JTextArea设置为可聚焦（text.setFocusable（true））我已经将JTree设置为可编辑，我尝试了setFocusable（true），但它仍然没有响应，我可能会尝试requestFocus（），thanx Riso