java - 我如何创建两个具有相同Columnmodel但具有不同模型的Jtable

标签 java swing jtable jpanel jscrollpane

我设计了两个具有相同列模型的jtable，因此它们相应地调整大小，这两个jtable应该具有相同的列号，我希望它们在我们调整列大小或更改滚动条时以相同的方式表现。现在我遇到的问题是，当我调整第二个表的大小时，行上的列不会改变其大小，并且滚动条不会相应地表现。

我的代码是这样的

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.JScrollPane;

public class CompFilteredTable extends JPanel{
    private JTable tblFilter;
    private JTable tblData;
    private JScrollPane scrollPane;
    private JScrollPane scrollPane_1;
    public CompFilteredTable() {
        setLayout(new BorderLayout(0, 0));
        add(getScrollPane_1(), BorderLayout.NORTH);
        add(getScrollPane(), BorderLayout.CENTER);
    }



    public JTable getTblFilter() {
        if (tblFilter == null) {
            tblFilter = new MyTable(new TestTableModel2());
            tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            tblFilter.setTableHeader (null);
        }
        return tblFilter;
    }
    public JTable getTblData() {
        if (tblData == null) {
            tblData = new MyTable(new TestTableModel());
            tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

            tblFilter.setColumnModel(tblData.getColumnModel());
        }   
        return tblData;
    }

    private class MyTable extends JTable {
        private MyTable (final TableModel model) {
            super (model);
        }

        private boolean isColumnMarginChangeInProgress=false;
        @Override
        public void columnMarginChanged(final ChangeEvent e) {
            if (isColumnMarginChangeInProgress) {
                return;
            }
            isColumnMarginChangeInProgress = true;

            if (isEditing()) {
                removeEditor();
            }
            TableColumn resizingColumn = null;
            if (tableHeader != null) {
                resizingColumn = tableHeader.getResizingColumn();
            }
            if (resizingColumn != null) {
                if (autoResizeMode == AUTO_RESIZE_OFF) {
                    resizingColumn.setPreferredWidth(resizingColumn.getWidth());
                } else {    // this else block is missing in jdk1.4 as compared to 1.3
                    doLayout();
                    repaint();
                }
            } else {
                resizeAndRepaint();
            }
            isColumnMarginChangeInProgress = false;
        }
    }



    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setPreferredSize(new Dimension(600, 400));

        CompFilteredTable compFilteredTable = new CompFilteredTable();

        frame.getContentPane().add(compFilteredTable);
        frame.pack();
        frame.setVisible(true);

    }

    private class TestTableModel extends DefaultTableModel {
        @Override
        public int getRowCount () {
            return 10;
        }
        @Override
        public int getColumnCount () {
            return 10;
        }
        @Override
        public String getColumnName (final int column) {
            return "Col-"+column;
        }

        @Override
        public Object getValueAt (final int row, final int column) {
            return (row * column) + "";
        }
    }

    private class TestTableModel2 extends DefaultTableModel {
        @Override
        public int getRowCount () {
            return 1;
        }
        @Override
        public int getColumnCount () {
            return 10;
        }
        @Override
        public String getColumnName (final int column) {
            return "Col-"+column;
        }

        @Override
        public Object getValueAt (final int row, final int column) {
            return (row * column) + "";
        }
    }



    private JScrollPane getScrollPane() {
        if (scrollPane == null) {
            scrollPane = new JScrollPane();
            scrollPane.setViewportView(getTblData());
        }
        return scrollPane;
    }
    private JScrollPane getScrollPane_1() {
        if (scrollPane_1 == null) {
            scrollPane_1 = new JScrollPane();
            scrollPane_1.setViewportView(getTblFilter());
        }
        return scrollPane_1;
    }
}

贡献 Deepak 后更新了代码(我不知道如何显示我的更新，因此我在下面添加了)

我更新了代码，现在在图片上看到了两个问题。第二个表的表头看不到，表与表之间差距很大。

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.JScrollPane;
import java.awt.GridLayout;

public class CompFilteredTable extends JPanel{
    private JTable tblFilter;
    private JTable tblData;
    private JScrollPane scrollPane;
    private JPanel panel;

    public CompFilteredTable() {
        setLayout(new BorderLayout(0, 0));
        add(getScrollPane(), BorderLayout.CENTER);
    }


    public JTable getTblFilter() {
        if (tblFilter == null) {
            tblFilter = new MyTable(new TestTableModel2());
            tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            tblFilter.setTableHeader (null);
        }
        return tblFilter;
    }
    public JTable getTblData() {
        if (tblData == null) {
            tblData = new MyTable(new TestTableModel());
            tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

            tblFilter.setColumnModel(tblData.getColumnModel());
        }   
        return tblData;
    }

    private class MyTable extends JTable {
        private MyTable (final TableModel model) {
            super (model);
        }

        private boolean isColumnMarginChangeInProgress=false;
        @Override
        public void columnMarginChanged(final ChangeEvent e) {
            if (isColumnMarginChangeInProgress) {
                return;
            }
            isColumnMarginChangeInProgress = true;

            if (isEditing()) {
                removeEditor();
            }
            TableColumn resizingColumn = null;
            if (tableHeader != null) {
                resizingColumn = tableHeader.getResizingColumn();
            }
            if (resizingColumn != null) {
                if (autoResizeMode == AUTO_RESIZE_OFF) {
                    resizingColumn.setPreferredWidth(resizingColumn.getWidth());
                } else {    // this else block is missing in jdk1.4 as compared to 1.3
                    doLayout();
                }
                repaint();
            } else {
                resizeAndRepaint();
            }
            isColumnMarginChangeInProgress = false;
        }
    }



    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setPreferredSize(new Dimension(600, 400));

        CompFilteredTable compFilteredTable = new CompFilteredTable();

        frame.getContentPane().add(compFilteredTable);
        frame.pack();
        frame.setVisible(true);

    }

    private class TestTableModel extends DefaultTableModel {
        @Override
        public int getRowCount () {
            return 10;
        }
        @Override
        public int getColumnCount () {
            return 10;
        }
        @Override
        public String getColumnName (final int column) {
            return "Col-"+column;
        }

        @Override
        public Object getValueAt (final int row, final int column) {
            return (row * column) + "";
        }
    }

    private class TestTableModel2 extends DefaultTableModel {
        @Override
        public int getRowCount () {
            return 1;
        }
        @Override
        public int getColumnCount () {
            return 10;
        }
        @Override
        public String getColumnName (final int column) {
            return "Col-"+column;
        }

        @Override
        public Object getValueAt (final int row, final int column) {
            return (row * column) + "";
        }
    }

    private JScrollPane getScrollPane() {
        if (scrollPane == null) {
            scrollPane = new JScrollPane();
            scrollPane.setViewportView(getPanel());
        }
        return scrollPane;
    }

    private JPanel getPanel() {
        if (panel == null) {
            panel = new JPanel();
            panel.setLayout(new GridLayout(2, 1, 0, 0));
            panel.add(getTblFilter());
            panel.add(getTblData());
        }
        return panel;
    }

}

输出屏幕

tables output

最佳答案

使用 columnMarginChanged 事件中的 setPreferredWidth 方法设置 TableColumn 的首选宽度将更新 JTableHeader成分。因此，正如观察到的那样，表头的大小正在调整。 设置所需属性后显式调用 repaint() 也会触发将更改应用于表的每个组件。

因此，要使其按照您的预期运行，需要进行以下更改。 

            if (autoResizeMode == AUTO_RESIZE_OFF) {
                resizingColumn.setPreferredWidth(resizingColumn.getWidth());
                repaint();
            } else {    // this else block is missing in jdk1.4 as compared to 1.3

此外，repaint() 也可以移出条件 block 。

关于java - 我如何创建两个具有相同Columnmodel但具有不同模型的Jtable，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32901874/

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