tim/prune/gui/GuiGridLayout.java

   1 package tim.prune.gui;
   2
   3 import java.awt.GridBagConstraints;
   4 import java.awt.GridBagLayout;
   5 import java.awt.Insets;
   6
   7 import javax.swing.JComponent;
   8 import javax.swing.JPanel;
   9
  10 /**
  11  * Class to make it easier to use GridBagLayout
  12  * for a two-column, non-equal-width layout
  13  */
  14 public class GuiGridLayout
  15 {
  16         private GridBagLayout _layout = null;
  17         private GridBagConstraints _constraints = null;
  18         private JPanel _panel = null;
  19         private int _x = 0;
  20         private int _y = 0;
  21
  22         /**
  23          * Constructor
  24          * @param inPanel panel using layout
  25          */
  26         public GuiGridLayout(JPanel inPanel)
  27         {
  28                 _panel = inPanel;
  29                 _layout = new GridBagLayout();
  30                 _constraints = new GridBagConstraints();
  31                 _constraints.weightx = 1.0;
  32                 _constraints.weighty = 0.0;
  33                 _constraints.ipadx = 10;
  34                 _constraints.ipady = 1;
  35                 _constraints.insets = new Insets(1, 5, 1, 5);
  36                 // Apply layout to panel
  37                 _panel.setLayout(_layout);
  38         }
  39
  40         /**
  41          * Add the given component to the grid
  42          * @param inComponent component to add
  43          */
  44         public void add(JComponent inComponent)
  45         {
  46                 _constraints.gridx = _x;
  47                 _constraints.gridy = _y;
  48                 _constraints.weightx = (_x==0?0.5:1.0);
  49                 // set anchor
  50                 _constraints.anchor = (_x == 0?GridBagConstraints.LINE_END:GridBagConstraints.LINE_START);
  51                 _layout.setConstraints(inComponent, _constraints);
  52                 // add to panel
  53                 _panel.add(inComponent);
  54                 // work out next position
  55                 _x++;
  56                 if (_x > 1) {
  57                         _x = 0;
  58                         _y++;
  59                 }
  60         }
  61 }