discontiguous outline:unable to process

"discontiguous outline: unable to process"是指非连续的轮廓或者线条无法进行处理。这可能发生在图像或图形处理中，当处理的对象的轮廓或线条存在间隙或断裂时，可能会遇到无法处理的问题。

在进行图像处理时，连续的轮廓或线条通常是必要的，因为大多数算法和技术都会依赖于连续性来进行检测、分割或识别等操作。如果轮廓或线条存在间隙或断裂，这可能会导致算法无法准确地辨识或处理对象。

例如，当进行物体识别时，算法通常会根据物体的边缘或轮廓来确定其形状和位置。如果对象的边缘存在间隙或断裂，算法可能无法正确地识别物体，从而导致“discontiguous outline: unable to process”的错误。

解决这个问题的方法可能包括使用图像处理技术来填补或修复轮廓中的间隙，或使用更复杂的算法来处理不连续的轮廓。另外，确保图像质量和清晰度也是减少这个问题的重要因素，因为清晰的图像通常会产生更连续的轮廓或线条。总之，解决“discontiguous outline: unable to process”的问题需要综合考虑图像质量、处理技术和算法的改进等因素。

相关问题

treedemo实现复选框

要在TreeDemo中实现复选框，您需要进行以下步骤：

1. 首先，在TreeDemo中创建一个TreeCellRenderer类，用于渲染树节点。您可以继承DefaultTreeCellRenderer类并添加一个复选框来实现这一点。

2. 接下来，您需要重写TreeSelectionModel类的valueForPathChanged方法，以便当复选框的状态更改时更新树的状态。

3. 在TreeDemo的createNodes方法中，为每个节点添加一个TreeSelectionListener来监听复选框的状态更改。

4. 最后，在TreeDemo的main方法中创建一个JFrame并将树添加到该窗口中。

以下是一个简单的示例代码，演示如何在TreeDemo中实现复选框：

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;

public class TreeDemo extends JPanel implements TreeSelectionListener {
    private JTree tree;
    private DefaultTreeModel treeModel;

    public TreeDemo() {
        super(new GridLayout(1,0));

        DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
        treeModel = new DefaultTreeModel(root);

        tree = new JTree(treeModel);
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
        tree.setCellRenderer(new CheckBoxNodeRenderer());
        tree.setCellEditor(new CheckBoxNodeEditor(tree));
        tree.setEditable(true);

        JScrollPane scrollPane = new JScrollPane(tree);

        add(scrollPane);
    }

    public void valueChanged(TreeSelectionEvent e) {
        DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                           tree.getLastSelectedPathComponent();

        if (node == null) return;

        Object nodeInfo = node.getUserObject();
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("TreeDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        TreeDemo newContentPane = new TreeDemo();
        newContentPane.setOpaque(true);
        frame.setContentPane(newContentPane);

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

class CheckBoxNodeRenderer implements TreeCellRenderer {
    private JCheckBox leafRenderer = new JCheckBox();

    private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();

    Color selectionBorderColor, selectionForeground, selectionBackground,
          textForeground, textBackground;

    protected JCheckBox getLeafRenderer() {
        return leafRenderer;
    }

    public CheckBoxNodeRenderer() {
        Font fontValue;
        fontValue = UIManager.getFont("Tree.font");
        if (fontValue != null) {
            leafRenderer.setFont(fontValue);
        }
        Boolean booleanValue = (Boolean) UIManager.get("Tree.drawsFocusBorderAroundIcon");
        leafRenderer.setFocusPainted((booleanValue != null) && (booleanValue.booleanValue()));

        selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
        selectionForeground = UIManager.getColor("Tree.selectionForeground");
        selectionBackground = UIManager.getColor("Tree.selectionBackground");
        textForeground = UIManager.getColor("Tree.textForeground");
        textBackground = UIManager.getColor("Tree.textBackground");
    }

    public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean selected, boolean expanded, boolean leaf, int row,
        boolean hasFocus) {

        Component returnValue;
        if (leaf) {

            String stringValue = tree.convertValueToText(value, selected,
                expanded, leaf, row, false);
            leafRenderer.setText(stringValue);
            leafRenderer.setSelected(false);

            leafRenderer.setEnabled(tree.isEnabled());

            if (selected) {
                leafRenderer.setForeground(selectionForeground);
                leafRenderer.setBackground(selectionBackground);
            } else {
                leafRenderer.setForeground(textForeground);
                leafRenderer.setBackground(textBackground);
            }

            if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
                Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
                if (userObject instanceof CheckBoxNode) {
                    CheckBoxNode node = (CheckBoxNode) userObject;
                    leafRenderer.setText(node.getText());
                    leafRenderer.setSelected(node.isSelected());
                }
            }
            returnValue = leafRenderer;
        } else {
            returnValue = nonLeafRenderer.getTreeCellRendererComponent(tree,
                value, selected, expanded, leaf, row, hasFocus);
        }
        return returnValue;
    }
}

class CheckBoxNodeEditor extends DefaultTreeCellEditor {
    CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();

    public CheckBoxNodeEditor(JTree tree) {
        super(tree);
    }

    public Component getTreeCellEditorComponent(JTree tree, Object value,
        boolean selected, boolean expanded, boolean leaf, int row) {

        Component editor = renderer.getTreeCellRendererComponent(tree, value,
            true, expanded, leaf, row, true);

        // editor always selected / focused
        ItemListener itemListener = new ItemListener() {
            public void itemStateChanged(ItemEvent itemEvent) {
                if (stopCellEditing()) {
                    fireEditingStopped();
                }
            }
        };
        if (editor instanceof JCheckBox) {
            ((JCheckBox) editor).addItemListener(itemListener);
        }
        return editor;
    }

    public Object getCellEditorValue() {
        JCheckBox checkbox = renderer.getLeafRenderer();
        CheckBoxNode checkBoxNode = new CheckBoxNode(checkbox.getText(),
            checkbox.isSelected());
        return checkBoxNode;
    }
}

class CheckBoxNode {
    String text;

    boolean selected;

    public CheckBoxNode(String text, boolean selected) {
        this.text = text;
        this.selected = selected;
    }

    public boolean isSelected() {
        return selected;
    }

    public void setSelected(boolean newValue) {
        selected = newValue;
    }

    public String getText() {
        return text;
    }

    public void setText(String newValue) {
        text = newValue;
    }

    public String toString() {
        return getClass().getName() + "[" + text + "/" + selected + "]";
    }
}

请注意，上面的示例代码可能需要根据您的具体要求进行修改。