java.awt.GridBagConstraints#BASELINE_LEADING源码实例Demo

public SingleIntegerFieldOptionsPanel(String labelString,
                                      final InspectionProfileEntry owner,
                                      @NonNls final String property,
                                      int integerFieldColumns) {
    super(new GridBagLayout());
    final JLabel label = new JLabel(labelString);
    final JFormattedTextField valueField = createIntegerFieldTrackingValue(owner, property, integerFieldColumns);
    final GridBagConstraints constraints = new GridBagConstraints();
    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.insets.right = UIUtil.DEFAULT_HGAP;
    constraints.weightx = 0.0;
    constraints.anchor = GridBagConstraints.BASELINE_LEADING;
    constraints.fill = GridBagConstraints.NONE;
    add(label, constraints);
    constraints.gridx = 1;
    constraints.gridy = 0;
    constraints.weightx = 1.0;
    constraints.weighty = 1.0;
    constraints.insets.right = 0;
    constraints.anchor = GridBagConstraints.BASELINE_LEADING;
    constraints.fill = GridBagConstraints.NONE;
    add(valueField, constraints);
}
 

/**
 * Appends a new row containing 3 objects to this inspector.
 * 
 * The identifier is right-aligned. The leftControl is right-aligned, and
 * the rightControl is right-aligned against the far right margin of the
 * inspector.
 * 
 * @param identifier
 *            the control on the left. This should usually contain text. A
 *            <code>JLabel</code> or a <code>JCheckBox</code> is
 *            recommended.
 * @param leftControl
 *            any other control.
 * @param stretchToFill
 *            whether the <code>leftControl</code> should stretch to fit the
 *            remaining width.
 * @param rightControl
 *            the element to add on the right.
 */
public InspectorRowPanel addRow(JComponent identifier,
		JComponent leftControl, boolean stretchToFill,
		JComponent rightControl) {
	prepare(Position.LEAD, identifier);
	Position pos = stretchToFill ? Position.MAIN_WITH_LEAD_STRETCH_TO_FILL
			: Position.MAIN_WITH_LEAD_NO_STRETCH;
	prepare(pos, leftControl);
	prepare(Position.TRAIL, rightControl);

	JPanel controlPanel = new JPanel(new GridBagLayout());
	controlPanel.setOpaque(false);
	GridBagConstraints c = new GridBagConstraints();
	c.gridx = 0;
	c.gridy = 0;
	c.weightx = 1;
	c.weighty = 1;
	c.anchor = GridBagConstraints.BASELINE_LEADING;
	c.fill = stretchToFill ? GridBagConstraints.BOTH
			: GridBagConstraints.NONE;
	c.insets = getInsets(pos, leftControl);
	controlPanel.add(leftControl, c);
	c.gridx++;
	c.weightx = 0;
	c.fill = GridBagConstraints.NONE;
	c.anchor = GridBagConstraints.BASELINE_TRAILING;
	c.insets = getInsets(Position.TRAIL, rightControl);
	controlPanel.add(rightControl, c);
	controlPanel.putClientProperty(PROPERTY_WRAPPED, Boolean.TRUE);
	return addRow(new InspectorRow(identifier, controlPanel, false, 0));
}
 

@Override
public void actionPerformed(ActionEvent e) {
    JButton button = (JButton) e.getSource();
    JCheckBox firstEntry = null;
    JPopupMenu popupMenu = new JPopupMenu();

    JPanel menuPanel = new JPanel();
    menuPanel.setFocusCycleRoot(true);
    popupMenu.add(menuPanel);
    menuPanel.setLayout(new GridBagLayout());
    GridBagConstraints constraints = new GridBagConstraints();
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.anchor = GridBagConstraints.BASELINE_LEADING;
    constraints.weightx = 1;
    constraints.gridx = 0;
    
    Set<Integer> visibleColumns = dataPanel.getVisibleColumns();
    DataViewTableUIModel dvtm = dataPanel.getModel();
    
    for(int i = 0; i < dvtm.getColumnCount(); i++) {
        JCheckBox columnEntry = new JCheckBox(dvtm.getColumnName(i));
        columnEntry.setActionCommand(Integer.toString(i));
        columnEntry.setSelected(visibleColumns.contains(i));
        columnEntry.addActionListener(columnVisibilityToggler);
        constraints.gridy += 1;
        menuPanel.add(columnEntry, constraints);
        if(firstEntry == null) {
            firstEntry = columnEntry;
        }
    }
    
    constraints.gridy += 1;
    menuPanel.add(new JSeparator(), constraints);
    
    JCheckBox checkboxItem = new JCheckBox("Fit column width");
    checkboxItem.setSelected(dataPanel.getAutoResizeMode() != JTable.AUTO_RESIZE_OFF);
    checkboxItem.addActionListener(fitColumnWidthToggler);
    
    constraints.gridy += 1;
    menuPanel.add(checkboxItem, constraints);
    
    popupMenu.show(button, 0, button.getHeight());
    if(firstEntry == null) {
        checkboxItem.requestFocus();
    } else {
        firstEntry.requestFocus();
    }
}