?? columngroup.java
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/* (swing1.1beta3) */
package table;
import java.awt.Component;
import java.awt.Dimension;
import java.util.Enumeration;
import java.util.Vector;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
/** ColumnGroup.
@author Nobuo Tamemasa
@version 1.0 10/20/98
*/
class ColumnGroup {
protected TableCellRenderer renderer;
protected Vector v;
protected String text;
protected int margin = 0;
public ColumnGroup(String text) {
this(null, text);
}
public ColumnGroup(TableCellRenderer renderer, String text) {
if (renderer == null) {
this.renderer = new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
setHorizontalAlignment(JLabel.CENTER);
setText((value == null) ? "" : value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
};
} else {
this.renderer = renderer;
}
this.text = text;
v = new Vector();
}
/**
* param obj TableColumn or ColumnGroup
*/
//@SuppressWarnings("unchecked")
public void add(Object obj) {
if (obj == null) {
return;
}
v.addElement(obj);
}
/**
* param c TableColumn
* param v ColumnGroups
*/
//@SuppressWarnings("unchecked")
public Vector getColumnGroups(TableColumn c, Vector g) {
g.addElement(this);
if (v.contains(c))
return g;
Enumeration em = v.elements();
while (em.hasMoreElements()) {
Object obj = em.nextElement();
if (obj instanceof ColumnGroup) {
Vector groups = (Vector) ((ColumnGroup) obj).getColumnGroups(c,
(Vector) g.clone());
if (groups != null)
return groups;
}
}
return null;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public void setHeaderRenderer(TableCellRenderer renderer) {
if (renderer != null) {
this.renderer = renderer;
}
}
public Object getHeaderValue() {
return text;
}
public Dimension getSize(JTable table) {
Component comp = renderer.getTableCellRendererComponent(table,
getHeaderValue(), false, false, -1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
Enumeration em = v.elements();
while (em.hasMoreElements()) {
Object obj = em.nextElement();
if (obj instanceof TableColumn) {
TableColumn aColumn = (TableColumn) obj;
// if(GroupHeader.EMPTY_LABEL.equals(aColumn.getHeaderValue())){
// height=comp.getPreferredSize().height+aColumn.getHeaderRenderer()
// .getTableCellRendererComponent(table,
// getHeaderValue(), false, false, -1, -1).getPreferredSize().height;
// //height=
// }
width += aColumn.getWidth();
width += margin;
} else {
width += ((ColumnGroup) obj).getSize(table).width;
}
}
return new Dimension(width, height);
}
public void setColumnMargin(int margin) {
this.margin = margin;
Enumeration em = v.elements();
while (em.hasMoreElements()) {
Object obj = em.nextElement();
if (obj instanceof ColumnGroup) {
((ColumnGroup) obj).setColumnMargin(margin);
}
}
}
}
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