mirror of git://gcc.gnu.org/git/gcc.git
755 lines
20 KiB
Java
755 lines
20 KiB
Java
/* JSpinner.java --
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Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Dimension;
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import java.awt.Insets;
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import java.awt.LayoutManager;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import java.text.DateFormat;
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import java.text.DecimalFormat;
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import java.text.NumberFormat;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import javax.swing.plaf.SpinnerUI;
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import javax.swing.text.DateFormatter;
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import javax.swing.text.DefaultFormatterFactory;
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import javax.swing.text.NumberFormatter;
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/**
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* A <code>JSpinner</code> is a component that displays a single value from
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* a sequence of values, and provides a convenient means for selecting the
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* previous and next values in the sequence. Typically the spinner displays
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* a numeric value, but it is possible to display dates or arbitrary items
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* from a list.
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*
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* @author Ka-Hing Cheung
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*
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* @since 1.4
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*/
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public class JSpinner extends JComponent
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{
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/**
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* The base class for the editor used by the {@link JSpinner} component.
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* The editor is in fact a panel containing a {@link JFormattedTextField}
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* component.
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*/
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public static class DefaultEditor
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extends JPanel
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implements ChangeListener, PropertyChangeListener, LayoutManager
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{
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/** The spinner that the editor is allocated to. */
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private JSpinner spinner;
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/** The JFormattedTextField that backs the editor. */
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JFormattedTextField ftf;
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/**
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* For compatability with Sun's JDK 1.4.2 rev. 5
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*/
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private static final long serialVersionUID = -5317788736173368172L;
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/**
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* Creates a new <code>DefaultEditor</code> object. The editor is
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* registered with the spinner as a {@link ChangeListener} here.
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*
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* @param spinner the <code>JSpinner</code> associated with this editor
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*/
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public DefaultEditor(JSpinner spinner)
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{
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super();
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setLayout(this);
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this.spinner = spinner;
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ftf = new JFormattedTextField();
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add(ftf);
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ftf.setValue(spinner.getValue());
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ftf.addPropertyChangeListener(this);
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if (getComponentOrientation().isLeftToRight())
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ftf.setHorizontalAlignment(JTextField.RIGHT);
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else
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ftf.setHorizontalAlignment(JTextField.LEFT);
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spinner.addChangeListener(this);
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}
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/**
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* Returns the <code>JSpinner</code> component that the editor is assigned
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* to.
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*
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* @return The spinner that the editor is assigned to.
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*/
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public JSpinner getSpinner()
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{
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return spinner;
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}
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/**
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* DOCUMENT ME!
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*/
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public void commitEdit() throws ParseException
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{
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// TODO: Implement this properly.
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}
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/**
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* Removes the editor from the {@link ChangeListener} list maintained by
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* the specified <code>spinner</code>.
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*
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* @param spinner the spinner (<code>null</code> not permitted).
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*/
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public void dismiss(JSpinner spinner)
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{
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spinner.removeChangeListener(this);
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}
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/**
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* Returns the text field used to display and edit the current value in
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* the spinner.
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*
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* @return The text field.
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*/
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public JFormattedTextField getTextField()
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{
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return ftf;
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}
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/**
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* Sets the bounds for the child components in this container. In this
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* case, the text field is the only component to be laid out.
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*
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* @param parent the parent container.
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*/
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public void layoutContainer(Container parent)
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{
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Insets insets = getInsets();
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Dimension size = getSize();
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ftf.setBounds(insets.left, insets.top,
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size.width - insets.left - insets.right,
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size.height - insets.top - insets.bottom);
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}
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/**
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* Calculates the minimum size for this component. In this case, the
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* text field is the only subcomponent, so the return value is the minimum
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* size of the text field plus the insets of this component.
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*
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* @param parent the parent container.
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*
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* @return The minimum size.
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*/
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public Dimension minimumLayoutSize(Container parent)
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{
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Insets insets = getInsets();
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Dimension minSize = ftf.getMinimumSize();
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return new Dimension(minSize.width + insets.left + insets.right,
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minSize.height + insets.top + insets.bottom);
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}
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/**
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* Calculates the preferred size for this component. In this case, the
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* text field is the only subcomponent, so the return value is the
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* preferred size of the text field plus the insets of this component.
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*
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* @param parent the parent container.
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*
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* @return The preferred size.
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*/
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public Dimension preferredLayoutSize(Container parent)
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{
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Insets insets = getInsets();
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Dimension prefSize = ftf.getPreferredSize();
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return new Dimension(prefSize.width + insets.left + insets.right,
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prefSize.height + insets.top + insets.bottom);
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}
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/**
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* Receives notification of property changes. If the text field's 'value'
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* property changes, the spinner's model is updated accordingly.
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*
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* @param event the event.
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*/
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public void propertyChange(PropertyChangeEvent event)
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{
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if (event.getSource() == ftf)
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{
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if (event.getPropertyName().equals("value"))
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spinner.getModel().setValue(event.getNewValue());
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}
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}
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/**
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* Receives notification of changes in the state of the {@link JSpinner}
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* that the editor belongs to - the content of the text field is updated
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* accordingly.
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*
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* @param event the change event.
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*/
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public void stateChanged(ChangeEvent event)
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{
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ftf.setValue(spinner.getValue());
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}
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/**
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* This method does nothing. It is required by the {@link LayoutManager}
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* interface, but since this component has a single child, there is no
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* need to use this method.
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*
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* @param child the child component to remove.
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*/
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public void removeLayoutComponent(Component child)
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{
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// Nothing to do here.
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}
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/**
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* This method does nothing. It is required by the {@link LayoutManager}
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* interface, but since this component has a single child, there is no
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* need to use this method.
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*
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* @param name the name.
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* @param child the child component to add.
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*/
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public void addLayoutComponent(String name, Component child)
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{
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// Nothing to do here.
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}
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}
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/**
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* A panel containing a {@link JFormattedTextField} that is configured for
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* displaying and editing numbers. The panel is used as a subcomponent of
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* a {@link JSpinner}.
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*
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* @see JSpinner#createEditor(SpinnerModel)
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*/
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public static class NumberEditor extends DefaultEditor
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{
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/**
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* For compatability with Sun's JDK
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*/
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private static final long serialVersionUID = 3791956183098282942L;
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/**
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* Creates a new <code>NumberEditor</code> object for the specified
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* <code>spinner</code>. The editor is registered with the spinner as a
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* {@link ChangeListener}.
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*
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* @param spinner the component the editor will be used with.
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*/
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public NumberEditor(JSpinner spinner)
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{
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super(spinner);
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NumberEditorFormatter nef = new NumberEditorFormatter();
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nef.setMinimum(getModel().getMinimum());
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nef.setMaximum(getModel().getMaximum());
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ftf.setFormatterFactory(new DefaultFormatterFactory(nef));
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}
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/**
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* Creates a new <code>NumberEditor</code> object.
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*
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* @param spinner the spinner.
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* @param decimalFormatPattern the number format pattern.
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*/
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public NumberEditor(JSpinner spinner, String decimalFormatPattern)
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{
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super(spinner);
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NumberEditorFormatter nef
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= new NumberEditorFormatter(decimalFormatPattern);
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nef.setMinimum(getModel().getMinimum());
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nef.setMaximum(getModel().getMaximum());
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ftf.setFormatterFactory(new DefaultFormatterFactory(nef));
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}
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/**
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* Returns the format used by the text field.
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*
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* @return The format used by the text field.
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*/
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public DecimalFormat getFormat()
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{
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NumberFormatter formatter = (NumberFormatter) ftf.getFormatter();
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return (DecimalFormat) formatter.getFormat();
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}
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/**
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* Returns the model used by the editor's {@link JSpinner} component,
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* cast to a {@link SpinnerNumberModel}.
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*
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* @return The model.
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*/
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public SpinnerNumberModel getModel()
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{
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return (SpinnerNumberModel) getSpinner().getModel();
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}
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}
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static class NumberEditorFormatter
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extends NumberFormatter
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{
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public NumberEditorFormatter()
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{
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super(NumberFormat.getInstance());
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}
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public NumberEditorFormatter(String decimalFormatPattern)
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{
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super(new DecimalFormat(decimalFormatPattern));
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}
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}
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/**
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* A <code>JSpinner</code> editor used for the {@link SpinnerListModel}.
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* This editor uses a <code>JFormattedTextField</code> to edit the values
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* of the spinner.
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*
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* @author Roman Kennke (kennke@aicas.com)
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*/
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public static class ListEditor extends DefaultEditor
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{
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/**
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* Creates a new instance of <code>ListEditor</code>.
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*
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* @param spinner the spinner for which this editor is used
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*/
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public ListEditor(JSpinner spinner)
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{
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super(spinner);
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}
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/**
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* Returns the spinner's model cast as a {@link SpinnerListModel}.
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*
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* @return The spinner's model.
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*/
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public SpinnerListModel getModel()
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{
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return (SpinnerListModel) getSpinner().getModel();
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}
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}
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/**
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* An editor class for a <code>JSpinner</code> that is used
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* for displaying and editing dates (e.g. that uses
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* <code>SpinnerDateModel</code> as model).
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*
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* The editor uses a {@link JTextField} with the value
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* displayed by a {@link DateFormatter} instance.
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*/
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public static class DateEditor extends DefaultEditor
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{
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/** The serialVersionUID. */
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private static final long serialVersionUID = -4279356973770397815L;
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/**
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* Creates a new instance of DateEditor for the specified
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* <code>JSpinner</code>.
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*
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* @param spinner the <code>JSpinner</code> for which to
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* create a <code>DateEditor</code> instance
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*/
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public DateEditor(JSpinner spinner)
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{
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super(spinner);
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DateEditorFormatter nef = new DateEditorFormatter();
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nef.setMinimum(getModel().getStart());
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nef.setMaximum(getModel().getEnd());
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ftf.setFormatterFactory(new DefaultFormatterFactory(nef));
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}
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/**
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* Creates a new instance of DateEditor for the specified
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* <code>JSpinner</code> using the specified date format
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* pattern.
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*
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* @param spinner the <code>JSpinner</code> for which to
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* create a <code>DateEditor</code> instance
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* @param dateFormatPattern the date format to use
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*
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* @see SimpleDateFormat#SimpleDateFormat(String)
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*/
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public DateEditor(JSpinner spinner, String dateFormatPattern)
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{
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super(spinner);
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DateEditorFormatter nef = new DateEditorFormatter(dateFormatPattern);
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nef.setMinimum(getModel().getStart());
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nef.setMaximum(getModel().getEnd());
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ftf.setFormatterFactory(new DefaultFormatterFactory(nef));
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}
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/**
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* Returns the <code>SimpleDateFormat</code> instance that is used to
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* format the date value.
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*
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* @return the <code>SimpleDateFormat</code> instance that is used to
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* format the date value
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*/
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public SimpleDateFormat getFormat()
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{
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DateFormatter formatter = (DateFormatter) ftf.getFormatter();
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return (SimpleDateFormat) formatter.getFormat();
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}
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/**
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* Returns the {@link SpinnerDateModel} that is edited by this editor.
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*
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* @return the <code>SpinnerDateModel</code> that is edited by this editor
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*/
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public SpinnerDateModel getModel()
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{
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return (SpinnerDateModel) getSpinner().getModel();
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}
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}
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static class DateEditorFormatter
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extends DateFormatter
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{
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public DateEditorFormatter()
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{
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super(DateFormat.getInstance());
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}
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public DateEditorFormatter(String dateFormatPattern)
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{
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super(new SimpleDateFormat(dateFormatPattern));
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}
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}
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/**
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* A listener that forwards {@link ChangeEvent} notifications from the model
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* to the {@link JSpinner}'s listeners.
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*/
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class ModelListener implements ChangeListener
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{
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/**
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* Creates a new listener.
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*/
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public ModelListener()
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{
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// nothing to do here
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}
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/**
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* Receives notification from the model that its state has changed.
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*
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* @param event the event (ignored).
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*/
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public void stateChanged(ChangeEvent event)
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{
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fireStateChanged();
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}
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}
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/**
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* The model that defines the current value and permitted values for the
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* spinner.
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*/
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private SpinnerModel model;
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/** The current editor. */
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private JComponent editor;
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private static final long serialVersionUID = 3412663575706551720L;
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/**
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* Creates a new <code>JSpinner</code> with default instance of
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* {@link SpinnerNumberModel} (that is, a model with value 0, step size 1,
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* and no upper or lower limit).
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*
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* @see javax.swing.SpinnerNumberModel
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*/
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public JSpinner()
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{
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this(new SpinnerNumberModel());
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}
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/**
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* Creates a new <code>JSpinner with the specified model. The
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* {@link #createEditor(SpinnerModel)} method is used to create an editor
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* that is suitable for the model.
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*
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* @param model the model (<code>null</code> not permitted).
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*
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* @throws NullPointerException if <code>model</code> is <code>null</code>.
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*/
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public JSpinner(SpinnerModel model)
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{
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this.model = model;
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this.editor = createEditor(model);
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model.addChangeListener(new ModelListener());
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updateUI();
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}
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/**
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* If the editor is <code>JSpinner.DefaultEditor</code>, then forwards the
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* call to it, otherwise do nothing.
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*
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* @throws ParseException DOCUMENT ME!
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*/
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public void commitEdit() throws ParseException
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{
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if (editor instanceof DefaultEditor)
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((DefaultEditor) editor).commitEdit();
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}
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/**
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* Gets the current editor
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*
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* @return the current editor
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*
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* @see #setEditor
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*/
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public JComponent getEditor()
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{
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return editor;
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}
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/**
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* Changes the current editor to the new editor. The old editor is
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* removed from the spinner's {@link ChangeEvent} list.
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*
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* @param editor the new editor (<code>null</code> not permitted.
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*
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* @throws IllegalArgumentException if <code>editor</code> is
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* <code>null</code>.
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*
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* @see #getEditor
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*/
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public void setEditor(JComponent editor)
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{
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if (editor == null)
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throw new IllegalArgumentException("editor may not be null");
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JComponent oldEditor = this.editor;
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if (oldEditor instanceof DefaultEditor)
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((DefaultEditor) oldEditor).dismiss(this);
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else if (oldEditor instanceof ChangeListener)
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removeChangeListener((ChangeListener) oldEditor);
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this.editor = editor;
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firePropertyChange("editor", oldEditor, editor);
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}
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/**
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* Returns the model used by the {@link JSpinner} component.
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*
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* @return The model.
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*
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* @see #setModel(SpinnerModel)
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*/
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public SpinnerModel getModel()
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{
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return model;
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}
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/**
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* Sets a new underlying model.
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*
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* @param newModel the new model to set
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*
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* @exception IllegalArgumentException if newModel is <code>null</code>
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*/
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public void setModel(SpinnerModel newModel)
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{
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if (newModel == null)
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throw new IllegalArgumentException();
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if (model == newModel)
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return;
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SpinnerModel oldModel = model;
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model = newModel;
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firePropertyChange("model", oldModel, newModel);
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setEditor(createEditor(model));
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}
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/**
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* Gets the next value without changing the current value.
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*
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* @return the next value
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*
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* @see javax.swing.SpinnerModel#getNextValue
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*/
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public Object getNextValue()
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{
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return model.getNextValue();
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}
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/**
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* Gets the previous value without changing the current value.
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*
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* @return the previous value
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*
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* @see javax.swing.SpinnerModel#getPreviousValue
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*/
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public Object getPreviousValue()
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{
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return model.getPreviousValue();
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}
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/**
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* Gets the <code>SpinnerUI</code> that handles this spinner
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*
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* @return the <code>SpinnerUI</code>
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*/
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public SpinnerUI getUI()
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{
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return (SpinnerUI) ui;
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}
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/**
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* Gets the current value of the spinner, according to the underly model,
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* not the UI.
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*
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* @return the current value
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*
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* @see javax.swing.SpinnerModel#getValue
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*/
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public Object getValue()
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{
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return model.getValue();
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}
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/**
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* Sets the value in the model.
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*
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* @param value the new value.
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*/
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public void setValue(Object value)
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{
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model.setValue(value);
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}
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/**
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* Returns the ID that identifies which look and feel class will be
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* the UI delegate for this spinner.
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*
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* @return <code>"SpinnerUI"</code>.
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*/
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public String getUIClassID()
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{
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return "SpinnerUI";
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}
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/**
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* This method resets the spinner's UI delegate to the default UI for the
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* current look and feel.
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*/
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public void updateUI()
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{
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setUI((SpinnerUI) UIManager.getUI(this));
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}
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/**
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* Sets the UI delegate for the component.
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*
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* @param ui The spinner's UI delegate.
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*/
|
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public void setUI(SpinnerUI ui)
|
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{
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super.setUI(ui);
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}
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/**
|
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* Adds a <code>ChangeListener</code>
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*
|
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* @param listener the listener to add
|
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*/
|
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public void addChangeListener(ChangeListener listener)
|
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{
|
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listenerList.add(ChangeListener.class, listener);
|
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}
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|
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/**
|
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* Remove a particular listener
|
|
*
|
|
* @param listener the listener to remove
|
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*/
|
|
public void removeChangeListener(ChangeListener listener)
|
|
{
|
|
listenerList.remove(ChangeListener.class, listener);
|
|
}
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|
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/**
|
|
* Gets all the <code>ChangeListener</code>s
|
|
*
|
|
* @return all the <code>ChangeListener</code>s
|
|
*/
|
|
public ChangeListener[] getChangeListeners()
|
|
{
|
|
return (ChangeListener[]) listenerList.getListeners(ChangeListener.class);
|
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}
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|
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/**
|
|
* Fires a <code>ChangeEvent</code> to all the <code>ChangeListener</code>s
|
|
* added to this <code>JSpinner</code>
|
|
*/
|
|
protected void fireStateChanged()
|
|
{
|
|
ChangeEvent evt = new ChangeEvent(this);
|
|
ChangeListener[] listeners = getChangeListeners();
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|
|
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for (int i = 0; i < listeners.length; ++i)
|
|
listeners[i].stateChanged(evt);
|
|
}
|
|
|
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/**
|
|
* Creates an editor that is appropriate for the specified <code>model</code>.
|
|
*
|
|
* @param model the model.
|
|
*
|
|
* @return The editor.
|
|
*/
|
|
protected JComponent createEditor(SpinnerModel model)
|
|
{
|
|
if (model instanceof SpinnerDateModel)
|
|
return new DateEditor(this);
|
|
else if (model instanceof SpinnerNumberModel)
|
|
return new NumberEditor(this);
|
|
else if (model instanceof SpinnerListModel)
|
|
return new ListEditor(this);
|
|
else
|
|
return new DefaultEditor(this);
|
|
}
|
|
}
|