Question

https://stackoverflow.com/questions/8839025/jtable-as-a-jtree-node” 我将JTable to JTree,但 JTree 意见在开始时正确提出,如何使用IsetP referredSize,JTable ,因为P referredScrollableViewportSize 缩略语<代码>JTable , 填入>TableHeader + 1 Row, 1 Row 仍为隐蔽,但在扩大诺德(s)树苗的改变和重新铺设setPnewsize后,将不再出现。

“entergraph

import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.*;

public class TreeWithTableRenderer extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTree tree;

    public TreeWithTableRenderer() {
        DefaultMutableTreeNode AA1 = new DefaultMutableTreeNode("AA1");
        DefaultMutableTreeNode AA2 = new DefaultMutableTreeNode("AA2");
        DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
        A.add(AA1);
        A.add(AA2);
        DefaultMutableTreeNode BB1 = new DefaultMutableTreeNode("BB1");
        DefaultMutableTreeNode BB2 = new DefaultMutableTreeNode("BB2");
        DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
        B.add(BB1);
        B.add(BB2);
        DefaultMutableTreeNode CC1 = new DefaultMutableTreeNode("CC1");
        DefaultMutableTreeNode CC2 = new DefaultMutableTreeNode("CC2");
        DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
        C.add(CC1);
        C.add(CC2);
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
        root.add(A);
        root.add(B);
        root.add(C);
        tree = new JTree(root);
        tree.setCellRenderer(new MyTableInTreeCellRenderer());
        tree.setRowHeight(0);
        JScrollPane jsp = new JScrollPane(tree);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(jsp, BorderLayout.CENTER);
        pack();
        setLocationRelativeTo(null);
    }

    class MyTableInTreeCellRenderer extends JPanel implements TreeCellRenderer {

        private static final long serialVersionUID = 1L;
        private JTable table;

        public MyTableInTreeCellRenderer() {
            super(new BorderLayout());
            table = new JTable();
            JScrollPane scrollPane = new JScrollPane(table);
            add(scrollPane);
        }

        public Component getTreeCellRendererComponent(JTree tree, Object value,
                boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
            final String v = (String) ((DefaultMutableTreeNode) value).getUserObject();
            table.setModel(new DefaultTableModel() {

                private static final long serialVersionUID = 1L;

                @Override
                public int getRowCount() {
                    return 2;
                }

                @Override
                public int getColumnCount() {
                    return 2;
                }

                @Override
                public Object getValueAt(int row, int column) {
                    return v + ":" + row + ":" + column;
                }
            });
            table.setPreferredScrollableViewportSize(table.getPreferredSize());
            return this;
        }
    }

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                new TreeWithTableRenderer().setVisible(true);
            }
        });
    }
}

Answer 1

• 清除螺旋式螺旋涡轮机,断裂缝(迄今为止我同意Russell:-),并使用适当的LayoutManager,在小组中增加桌子和头盔:

public MyTableInTreeCellRenderer() {
    super();
    setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
    table = new JTable();
    add(table.getTableHeader());
    add(table);
}

you ll probably need to tweak the visuals a bit, the left and top border lines are missing - not entirely sure which component paints them normally, could be the scrollPane

<

Forgot: the reason querying the scrollPane s prefSize in calculating the required size (done in the ui delegate, namely the VariableHeightLayoutCache) of the rendering component is that the scrollPane not yet configured with the header. The query happens before the panel is added to the rendererPane, the complete configuration is done in the table s addNotify which happens only after adding the panel to the hierarchy

Answer 2

You might just get rid of the ScrollPane and lay out the header and table in the panel directly (with a null LayoutManager so you can control everything yourself):

static class TableTreeCellRenderer extends JPanel implements TreeCellRenderer {
    private final JTable table;

    TableTreeCellRenderer() {
        table = new JTable();
        setLayout(null);
        add(table.getTableHeader());
        add(table);
    }

    public Dimension getPreferredSize() {
        Dimension headerSize = table.getTableHeader().getPreferredSize();
        Dimension tableSize = table.getPreferredSize();

        return new Dimension(Math.max(headerSize.width, tableSize.width),
                headerSize.height + tableSize.height);
    }

    public void setBounds(int x, int y, int width, int height) {
        super.setBounds(x, y, width, height);
        int headerHeight = table.getTableHeader().getPreferredSize().height;
        table.getTableHeader().setBounds(0, 0, width, headerHeight);
        table.setBounds(0, headerHeight, width, height - headerHeight);
    }

    public Component getTreeCellRendererComponent(JTree tree, Object value,
            boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
        final String v = (String) ((DefaultMutableTreeNode) value).getUserObject();
        table.setModel(new DefaultTableModel(new Object[][] { 
                { v + "0", "1" },
                { v + "2", "3" }
        }, new Object[] { "id", "value" } ));
        invalidate();
        return this;
    }
}

友情链接