JTable冻结列对齐问题(Java 1.6) [英] JTable frozen column alignment issue (Java 1.6)

问题描述

我已经实现了JTable的冻结列，当使用垂直滚动条滚动大型数据集时，冻结表中的列与主表不对齐.请帮忙

I have implemented JTable frozen columns as below.When scrolling on a large dataset using vertical scrollbar, the columns in the frozen table are not aligned with the main table.Please help

JTable      table,fixedTable
JScrollPane     _scrl_table;

table = new JTable();
table.setName("MAIN_TABLE");
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.setVisibleRowCount(8);


fixedTable = new JTable();
fixedTable.setName("FIXED_TABLE");
fixedTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fixedTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

 _scrl_table = new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

fixedTable.setPreferredScrollableViewportSize(fixedTable.getPreferredSize());
    _scrl_table.setRowHeaderView( fixedTable );
    _scrl_table.setCorner(JScrollPane.UPPER_LEFT_CORNER,         fixedTable.getTableHeader());  

推荐答案

• 也许没有理由使用两个JTables

  使用正确的 camickr的RowNumberTable 或 RowHeader

  您可以共享AdjustmentListener，无论是否包含BoundedRangeModel

  you can to share AdjustmentListener, with or without BoundedRangeModel

  示例滚动水平方向，必须更改为垂直

  example scrolling horizontal directions, have to change to the vertical

  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  import javax.swing.table.*;
  
  
  public class FixedRowExample extends JFrame {
  
      private static final long serialVersionUID = 1L;
      private Object[][] data;
      private Object[] column;
      private JTable fixedTable, table;
      private int FIXED_NUM = 2;
  
      public FixedRowExample() {
          super("Fixed Row Example");
          data = new Object[][]{
                      {"a", "", "", "", "", ""},
                      {"", "b", "", "", "", ""},
                      {"", "", "c", "", "", ""},
                      {"", "", "", "d", "", ""},
                      {"", "", "", "", "e", ""},
                      {"", "", "", "", "", "f"},
                      {"fixed1", "", "", "", "", "", "", ""},
                      {"fixed2", "", "", "", "", "", "", ""}};
          column = new Object[]{"A", "B", "C", "D", "E", "F"};
          AbstractTableModel model = new AbstractTableModel() {
  
              private static final long serialVersionUID = 1L;
  
              @Override
              public int getColumnCount() {
                  return column.length;
              }
  
              @Override
              public int getRowCount() {
                  return data.length - FIXED_NUM;
              }
  
              @Override
              public String getColumnName(int col) {
                  return (String) column[col];
              }
  
              @Override
              public Object getValueAt(int row, int col) {
                  return data[row][col];
              }
  
              @Override
              public void setValueAt(Object obj, int row, int col) {
                  data[row][col] = obj;
              }
  
              public boolean CellEditable(int row, int col) {
                  return true;
              }
          };
  
          AbstractTableModel fixedModel = new AbstractTableModel() {
  
              private static final long serialVersionUID = 1L;
  
              @Override
              public int getColumnCount() {
                  return column.length;
              }
  
              @Override
              public int getRowCount() {
                  return FIXED_NUM;
              }
  
              @Override
              public Object getValueAt(int row, int col) {
                  return data[row + (data.length - FIXED_NUM)][col];
              }
          };
          table = new JTable(model);
          table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          fixedTable = new JTable(fixedModel);
          fixedTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          fixedTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          JScrollPane scroll = new JScrollPane(table);
          scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
          JScrollPane fixedScroll = new JScrollPane(fixedTable) {
  
              private static final long serialVersionUID = 1L;
  
              @Override
              public void setColumnHeaderView(Component view) {
              } // work around
          }; // fixedScroll.setColumnHeader(null);  
          fixedScroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
          JScrollBar bar = fixedScroll.getVerticalScrollBar();
          JScrollBar dummyBar = new JScrollBar() {
  
              private static final long serialVersionUID = 1L;
  
              @Override
              public void paint(Graphics g) {
              }
          };
          dummyBar.setPreferredSize(bar.getPreferredSize());
          fixedScroll.setVerticalScrollBar(dummyBar);
  
          final JScrollBar bar1 = scroll.getHorizontalScrollBar();
          JScrollBar bar2 = fixedScroll.getHorizontalScrollBar();
          bar2.addAdjustmentListener(new AdjustmentListener() {
  
              @Override
              public void adjustmentValueChanged(AdjustmentEvent e) {
                  bar1.setValue(e.getValue());
              }
          });
          scroll.setPreferredSize(new Dimension(400, 100));
          fixedScroll.setPreferredSize(new Dimension(400, 52)); 
          getContentPane().add(scroll, BorderLayout.CENTER);
          getContentPane().add(fixedScroll, BorderLayout.SOUTH);
      }
  
      public static void main(String[] args) {
          FixedRowExample frame = new FixedRowExample();
          frame.addWindowListener(new WindowAdapter() {
  
              @Override
              public void windowClosing(WindowEvent e) {
                  System.exit(0);
              }
          });
          frame.pack();
          frame.setVisible(true);
      }
  }
  

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