groupabletableheader.java

JTable复杂表头的实现代码 JTable复杂表头的实现代码

/* (swing1.1beta3) */
package cn.com.table;

import java.util.Enumeration;
import java.util.Vector;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

/**  GroupableTableHeader
@version 1.0 10/20/98
@author Nobuo Tamemasa
*/
public class GroupableTableHeader extends JTableHeader {
  private static final String uiClassID = "GroupableTableHeaderUI";
  protected Vector columnGroups = null;

  public GroupableTableHeader(TableColumnModel model) {
    super(model);
    setUI(new GroupableTableHeaderUI(this));
    setReorderingAllowed(false);
  }

  public void setReorderingAllowed(boolean b) {
    reorderingAllowed = false;
  }

  public void addColumnGroup(ColumnGroup g) {
    if (columnGroups == null) {
      columnGroups = new Vector();
    }
    columnGroups.addElement(g);
  }

  public Enumeration getColumnGroups(TableColumn col) {
    if (columnGroups == null) return null;
    Enumeration enum = columnGroups.elements();
    while (enum.hasMoreElements()) {
      ColumnGroup cGroup = (ColumnGroup)enum.nextElement();
      Vector v_ret = (Vector)cGroup.getColumnGroups(col,new Vector());
      if (v_ret != null) {
	return v_ret.elements();
      }
    }
    return null;
  }

  public void setColumnMargin() {
    if (columnGroups == null) return;
    int columnMargin = getColumnModel().getColumnMargin();
    Enumeration enum = columnGroups.elements();
    while (enum.hasMoreElements()) {
      ColumnGroup cGroup = (ColumnGroup)enum.nextElement();
      cGroup.setColumnMargin(columnMargin);
    }
  }

}