bundles/org.simantics.spreadsheet.ui/src/org/simantics/spreadsheet/ui/RowHeaderRenderer.java

   1 package org.simantics.spreadsheet.ui;
   2
   3 import java.awt.Color;
   4 import java.awt.Component;
   5 import java.awt.Dimension;
   6 import java.util.HashMap;
   7 import java.util.Map;
   8
   9 import javax.swing.JLabel;
  10 import javax.swing.JList;
  11 import javax.swing.JTable;
  12 import javax.swing.ListCellRenderer;
  13 import javax.swing.SwingConstants;
  14 import javax.swing.table.JTableHeader;
  15
  16 public class RowHeaderRenderer implements ListCellRenderer {
  17
  18         private static Color ROW_HEADER_BACKGROUND = new Color(240, 240, 240);
  19
  20         final Map<Integer, JLabel> labels = new HashMap<Integer, JLabel>();
  21         final JTable table;
  22         final JTableHeader header;
  23
  24         RowHeaderRenderer(JTable table) {
  25                 header = table.getTableHeader();
  26                 this.table = table;
  27         }
  28
  29         private JLabel newLabel() {
  30                 JLabel label = new JLabel();
  31                 label.setOpaque(true);
  32                 label.setBorder(TableBorder.BORDER);
  33                 label.setHorizontalAlignment(SwingConstants.CENTER);
  34                 label.setForeground(header.getForeground());
  35                 label.setBackground(ROW_HEADER_BACKGROUND);
  36                 label.setFont(header.getFont());
  37                 return label;
  38         }
  39
  40         public Component getListCellRendererComponent(JList list, Object value,
  41                         int index, boolean isSelected, boolean cellHasFocus) {
  42
  43                 JLabel label = labels.get(index);
  44                 if(label == null) {
  45                         label = newLabel();
  46                         labels.put(index, label);
  47                 }
  48
  49                 label.setText((value == null) ? "" : value.toString());
  50
  51                 int height = table.getRowHeight(index);
  52                 label.setPreferredSize(new Dimension(label.getWidth(), height));
  53
  54                 return label;
  55
  56         }
  57 }