JDK14/Java14源码在线阅读
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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*
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package javax.swing;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.plaf.FontUIResource;
import javax.swing.plaf.UIResource;
import javax.swing.text.*;
import javax.swing.plaf.SpinnerUI;
import java.util.*;
import java.beans.*;
import java.text.*;
import java.io.*;
import java.text.spi.DateFormatProvider;
import java.text.spi.NumberFormatProvider;
import javax.accessibility.*;
import sun.util.locale.provider.LocaleProviderAdapter;
import sun.util.locale.provider.LocaleResources;
/**
* A single line input field that lets the user select a
* number or an object value from an ordered sequence. Spinners typically
* provide a pair of tiny arrow buttons for stepping through the elements
* of the sequence. The keyboard up/down arrow keys also cycle through the
* elements. The user may also be allowed to type a (legal) value directly
* into the spinner. Although combo boxes provide similar functionality,
* spinners are sometimes preferred because they don't require a drop down list
* that can obscure important data.
* <p>
* A <code>JSpinner</code>'s sequence value is defined by its
* <code>SpinnerModel</code>.
* The <code>model</code> can be specified as a constructor argument and
* changed with the <code>model</code> property. <code>SpinnerModel</code>
* classes for some common types are provided: <code>SpinnerListModel</code>,
* <code>SpinnerNumberModel</code>, and <code>SpinnerDateModel</code>.
* <p>
* A <code>JSpinner</code> has a single child component that's
* responsible for displaying
* and potentially changing the current element or <i>value</i> of
* the model, which is called the <code>editor</code>. The editor is created
* by the <code>JSpinner</code>'s constructor and can be changed with the
* <code>editor</code> property. The <code>JSpinner</code>'s editor stays
* in sync with the model by listening for <code>ChangeEvent</code>s. If the
* user has changed the value displayed by the <code>editor</code> it is
* possible for the <code>model</code>'s value to differ from that of
* the <code>editor</code>. To make sure the <code>model</code> has the same
* value as the editor use the <code>commitEdit</code> method, eg:
* <pre>
* try {
* spinner.commitEdit();
* }
* catch (ParseException pe) {
* // Edited value is invalid, spinner.getValue() will return
* // the last valid value, you could revert the spinner to show that:
* JComponent editor = spinner.getEditor();
* if (editor instanceof DefaultEditor) {
* ((DefaultEditor)editor).getTextField().setValue(spinner.getValue());
* }
* // reset the value to some known value:
* spinner.setValue(fallbackValue);
* // or treat the last valid value as the current, in which
* // case you don't need to do anything.
* }
* return spinner.getValue();
* </pre>
* <p>
* For information and examples of using spinner see
* <a href="https://docs.oracle.com/javase/tutorial/uiswing/components/spinner.html">How to Use Spinners</a>,
* a section in <em>The Java Tutorial.</em>
* <p>
* <strong>Warning:</strong> Swing is not thread safe. For more
* information see <a
* href="package-summary.html#threading">Swing's Threading
* Policy</a>.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @see SpinnerModel
* @see AbstractSpinnerModel
* @see SpinnerListModel
* @see SpinnerNumberModel
* @see SpinnerDateModel
* @see JFormattedTextField
*
* @author Hans Muller
* @author Lynn Monsanto (accessibility)
* @since 1.4
*/
@JavaBean(defaultProperty = "UI", description = "A single line input field that lets the user select a number or an object value from an ordered set.")
@SwingContainer(false)
@SuppressWarnings("serial") // Same-version serialization only
public class JSpinner extends JComponent implements Accessible
{
/**
* @see #getUIClassID
* @see #readObject
*/
private static final String uiClassID = "SpinnerUI";
private static final Action DISABLED_ACTION = new DisabledAction();
private SpinnerModel model;
private JComponent editor;
private ChangeListener modelListener;
private transient ChangeEvent changeEvent;
private boolean editorExplicitlySet = false;
/**
* Constructs a spinner for the given model. The spinner has
* a set of previous/next buttons, and an editor appropriate
* for the model.
*
* @param model a model for the new spinner
* @throws NullPointerException if the model is {@code null}
*/
public JSpinner(SpinnerModel model) {
if (model == null) {
throw new NullPointerException("model cannot be null");
}
this.model = model;
this.editor = createEditor(model);
setUIProperty("opaque",true);
updateUI();
}
/**
* Constructs a spinner with an <code>Integer SpinnerNumberModel</code>
* with initial value 0 and no minimum or maximum limits.
*/
public JSpinner() {
this(new SpinnerNumberModel());
}
/**
* Returns the look and feel (L&F) object that renders this component.
*
* @return the <code>SpinnerUI</code> object that renders this component
*/
public SpinnerUI getUI() {
return (SpinnerUI)ui;
}
/**
* Sets the look and feel (L&F) object that renders this component.
*
* @param ui the <code>SpinnerUI</code> L&F object
* @see UIDefaults#getUI
*/
public void setUI(SpinnerUI ui) {
super.setUI(ui);
}
/**
* Returns the suffix used to construct the name of the look and feel
* (L&F) class used to render this component.
*
* @return the string "SpinnerUI"
* @see JComponent#getUIClassID
* @see UIDefaults#getUI
*/
@BeanProperty(bound = false)
public String getUIClassID() {
return uiClassID;
}
/**
* Resets the UI property with the value from the current look and feel.
*
* @see UIManager#getUI
*/
public void updateUI() {
setUI((SpinnerUI)UIManager.getUI(this));
invalidate();
}
/**
* This method is called by the constructors to create the
* <code>JComponent</code>
* that displays the current value of the sequence. The editor may
* also allow the user to enter an element of the sequence directly.
* An editor must listen for <code>ChangeEvents</code> on the
* <code>model</code> and keep the value it displays
* in sync with the value of the model.
* <p>
* Subclasses may override this method to add support for new
* <code>SpinnerModel</code> classes. Alternatively one can just
* replace the editor created here with the <code>setEditor</code>
* method. The default mapping from model type to editor is:
* <ul>
* <li> <code>SpinnerNumberModel => JSpinner.NumberEditor</code>
* <li> <code>SpinnerDateModel => JSpinner.DateEditor</code>
* <li> <code>SpinnerListModel => JSpinner.ListEditor</code>
* <li> <i>all others</i> => <code>JSpinner.DefaultEditor</code>
* </ul>
*
* @return a component that displays the current value of the sequence
* @param model the value of getModel
* @see #getModel
* @see #setEditor
*/
protected JComponent createEditor(SpinnerModel model) {
if (model instanceof SpinnerDateModel) {
return new DateEditor(this);
}
else if (model instanceof SpinnerListModel) {
return new ListEditor(this);
}
else if (model instanceof SpinnerNumberModel) {
return new NumberEditor(this);
}
else {
return new DefaultEditor(this);
}
}
/**
* Changes the model that represents the value of this spinner.
* If the editor property has not been explicitly set,
* the editor property is (implicitly) set after the <code>"model"</code>
* <code>PropertyChangeEvent</code> has been fired. The editor
* property is set to the value returned by <code>createEditor</code>,
* as in:
* <pre>
* setEditor(createEditor(model));
* </pre>
*
* @param model the new <code>SpinnerModel</code>
* @see #getModel
* @see #getEditor
* @see #setEditor
* @throws IllegalArgumentException if model is <code>null</code>
*/
@BeanProperty(visualUpdate = true, description
= "Model that represents the value of this spinner.")
public void setModel(SpinnerModel model) {
if (model == null) {
throw new IllegalArgumentException("null model");
}
if (!model.equals(this.model)) {
SpinnerModel oldModel = this.model;
this.model = model;
if (modelListener != null) {
oldModel.removeChangeListener(modelListener);
this.model.addChangeListener(modelListener);
}
firePropertyChange("model", oldModel, model);
if (!editorExplicitlySet) {
setEditor(createEditor(model)); // sets editorExplicitlySet true
editorExplicitlySet = false;
}
repaint();
revalidate();
}
}
/**
* Returns the <code>SpinnerModel</code> that defines
* this spinners sequence of values.
*
* @return the value of the model property
* @see #setModel
*/
public SpinnerModel getModel() {
return model;
}
/**
* Returns the current value of the model, typically
* this value is displayed by the <code>editor</code>. If the
* user has changed the value displayed by the <code>editor</code> it is
* possible for the <code>model</code>'s value to differ from that of
* the <code>editor</code>, refer to the class level javadoc for examples
* of how to deal with this.
* <p>
* This method simply delegates to the <code>model</code>.
* It is equivalent to:
* <pre>
* getModel().getValue()
* </pre>
*
* @return the current value of the model
* @see #setValue
* @see SpinnerModel#getValue
*/
public Object getValue() {
return getModel().getValue();
}
/**
* Changes current value of the model, typically
* this value is displayed by the <code>editor</code>.
* If the <code>SpinnerModel</code> implementation
* doesn't support the specified value then an
* <code>IllegalArgumentException</code> is thrown.
* <p>
* This method simply delegates to the <code>model</code>.
* It is equivalent to:
* <pre>
* getModel().setValue(value)
* </pre>
*
* @param value new value for the spinner
* @throws IllegalArgumentException if <code>value</code> isn't allowed
* @see #getValue
* @see SpinnerModel#setValue
*/
public void setValue(Object value) {
getModel().setValue(value);
}
/**
* Returns the object in the sequence that comes after the object returned
* by <code>getValue()</code>. If the end of the sequence has been reached
* then return <code>null</code>.
* Calling this method does not effect <code>value</code>.
* <p>
* This method simply delegates to the <code>model</code>.
* It is equivalent to:
* <pre>
* getModel().getNextValue()
* </pre>
*
* @return the next legal value or <code>null</code> if one doesn't exist
* @see #getValue
* @see #getPreviousValue
* @see SpinnerModel#getNextValue
*/
@BeanProperty(bound = false)
public Object getNextValue() {
return getModel().getNextValue();
}
/**
* We pass <code>Change</code> events along to the listeners with the
* the slider (instead of the model itself) as the event source.
*/
private class ModelListener implements ChangeListener, Serializable {
public void stateChanged(ChangeEvent e) {
fireStateChanged();
}
}
/**
* Adds a listener to the list that is notified each time a change
* to the model occurs. The source of <code>ChangeEvents</code>
* delivered to <code>ChangeListeners</code> will be this
* <code>JSpinner</code>. Note also that replacing the model
* will not affect listeners added directly to JSpinner.
* Applications can add listeners to the model directly. In that
* case is that the source of the event would be the
* <code>SpinnerModel</code>.
*
* @param listener the <code>ChangeListener</code> to add
* @see #removeChangeListener
* @see #getModel
*/
public void addChangeListener(ChangeListener listener) {
if (modelListener == null) {
modelListener = new ModelListener();
getModel().addChangeListener(modelListener);
}
listenerList.add(ChangeListener.class, listener);
}
/**
* Removes a <code>ChangeListener</code> from this spinner.
*
* @param listener the <code>ChangeListener</code> to remove
* @see #fireStateChanged
* @see #addChangeListener
*/
public void removeChangeListener(ChangeListener listener) {
listenerList.remove(ChangeListener.class, listener);
}
/**
* Returns an array of all the <code>ChangeListener</code>s added
* to this JSpinner with addChangeListener().
*
* @return all of the <code>ChangeListener</code>s added or an empty
* array if no listeners have been added
* @since 1.4
*/
@BeanProperty(bound = false)
public ChangeListener[] getChangeListeners() {
return listenerList.getListeners(ChangeListener.class);
}
/**
* Sends a <code>ChangeEvent</code>, whose source is this
* <code>JSpinner</code>, to each <code>ChangeListener</code>.
* When a <code>ChangeListener</code> has been added
* to the spinner, this method is called each time
* a <code>ChangeEvent</code> is received from the model.
*
* @see #addChangeListener
* @see #removeChangeListener
* @see EventListenerList
*/
protected void fireStateChanged() {
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i -= 2) {
if (listeners[i] == ChangeListener.class) {
if (changeEvent == null) {
changeEvent = new ChangeEvent(this);
}
((ChangeListener)listeners[i+1]).stateChanged(changeEvent);
}
}
}
/**
* Returns the object in the sequence that comes
* before the object returned by <code>getValue()</code>.
* If the end of the sequence has been reached then
* return <code>null</code>. Calling this method does
* not effect <code>value</code>.
* <p>
* This method simply delegates to the <code>model</code>.
* It is equivalent to:
* <pre>
* getModel().getPreviousValue()
* </pre>
*
* @return the previous legal value or <code>null</code>
* if one doesn't exist
* @see #getValue
* @see #getNextValue
* @see SpinnerModel#getPreviousValue
*/
@BeanProperty(bound = false)
public Object getPreviousValue() {
return getModel().getPreviousValue();
}
/**
* Changes the <code>JComponent</code> that displays the current value
* of the <code>SpinnerModel</code>. It is the responsibility of this
* method to <i>disconnect</i> the old editor from the model and to
* connect the new editor. This may mean removing the
* old editors <code>ChangeListener</code> from the model or the
* spinner itself and adding one for the new editor.
*
* @param editor the new editor
* @see #getEditor
* @see #createEditor
* @see #getModel
* @throws IllegalArgumentException if editor is <code>null</code>
*/
@BeanProperty(visualUpdate = true, description
= "JComponent that displays the current value of the model")
public void setEditor(JComponent editor) {
if (editor == null) {
throw new IllegalArgumentException("null editor");
}
if (!editor.equals(this.editor)) {
JComponent oldEditor = this.editor;
this.editor = editor;
if (oldEditor instanceof DefaultEditor) {
((DefaultEditor)oldEditor).dismiss(this);
}
editorExplicitlySet = true;
firePropertyChange("editor", oldEditor, editor);
revalidate();
repaint();
}
}
/**
* Returns the component that displays and potentially
* changes the model's value.
*
* @return the component that displays and potentially
* changes the model's value
* @see #setEditor
* @see #createEditor
*/
public JComponent getEditor() {
return editor;
}
/**
* Commits the currently edited value to the <code>SpinnerModel</code>.
* <p>
* If the editor is an instance of <code>DefaultEditor</code>, the
* call if forwarded to the editor, otherwise this does nothing.
*
* @throws ParseException if the currently edited value couldn't
* be committed.
*/
public void commitEdit() throws ParseException {
JComponent editor = getEditor();
if (editor instanceof DefaultEditor) {
((DefaultEditor)editor).commitEdit();
}
}
/*
* See readObject and writeObject in JComponent for more
* information about serialization in Swing.
*
* @param s Stream to write to
*/
private void writeObject(ObjectOutputStream s) throws IOException {
s.defaultWriteObject();
if (getUIClassID().equals(uiClassID)) {
byte count = JComponent.getWriteObjCounter(this);
JComponent.setWriteObjCounter(this, --count);
if (count == 0 && ui != null) {
ui.installUI(this);
}
}
}
/**
* A simple base class for more specialized editors
* that displays a read-only view of the model's current
* value with a <code>JFormattedTextField</code>. Subclasses
* can configure the <code>JFormattedTextField</code> to create
* an editor that's appropriate for the type of model they
* support and they may want to override
* the <code>stateChanged</code> and <code>propertyChanged</code>
* methods, which keep the model and the text field in sync.
* <p>
* This class defines a <code>dismiss</code> method that removes the
* editors <code>ChangeListener</code> from the <code>JSpinner</code>
* that it's part of. The <code>setEditor</code> method knows about
* <code>DefaultEditor.dismiss</code>, so if the developer
* replaces an editor that's derived from <code>JSpinner.DefaultEditor</code>
* its <code>ChangeListener</code> connection back to the
* <code>JSpinner</code> will be removed. However after that,
* it's up to the developer to manage their editor listeners.
* Similarly, if a subclass overrides <code>createEditor</code>,
* it's up to the subclasser to deal with their editor
* subsequently being replaced (with <code>setEditor</code>).
* We expect that in most cases, and in editor installed
* with <code>setEditor</code> or created by a <code>createEditor</code>
* override, will not be replaced anyway.
* <p>
* This class is the <code>LayoutManager</code> for it's single
* <code>JFormattedTextField</code> child. By default the
* child is just centered with the parents insets.
* @since 1.4
*/
public static class DefaultEditor extends JPanel
implements ChangeListener, PropertyChangeListener, LayoutManager
{
/**
* Constructs an editor component for the specified <code>JSpinner</code>.
* This <code>DefaultEditor</code> is it's own layout manager and
* it is added to the spinner's <code>ChangeListener</code> list.
* The constructor creates a single <code>JFormattedTextField</code> child,
* initializes it's value to be the spinner model's current value
* and adds it to <code>this</code> <code>DefaultEditor</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @see #getTextField
* @see JSpinner#addChangeListener
*/
public DefaultEditor(JSpinner spinner) {
super(null);
JFormattedTextField ftf = new JFormattedTextField();
ftf.setName("Spinner.formattedTextField");
ftf.setValue(spinner.getValue());
ftf.addPropertyChangeListener(this);
ftf.setEditable(false);
ftf.setInheritsPopupMenu(true);
String toolTipText = spinner.getToolTipText();
if (toolTipText != null) {
ftf.setToolTipText(toolTipText);
}
add(ftf);
setLayout(this);
spinner.addChangeListener(this);
// We want the spinner's increment/decrement actions to be
// active vs those of the JFormattedTextField. As such we
// put disabled actions in the JFormattedTextField's actionmap.
// A binding to a disabled action is treated as a nonexistant
// binding.
ActionMap ftfMap = ftf.getActionMap();
if (ftfMap != null) {
ftfMap.put("increment", DISABLED_ACTION);
ftfMap.put("decrement", DISABLED_ACTION);
}
}
/**
* Disconnect <code>this</code> editor from the specified
* <code>JSpinner</code>. By default, this method removes
* itself from the spinners <code>ChangeListener</code> list.
*
* @param spinner the <code>JSpinner</code> to disconnect this
* editor from; the same spinner as was passed to the constructor.
*/
public void dismiss(JSpinner spinner) {
spinner.removeChangeListener(this);
}
/**
* Returns the <code>JSpinner</code> ancestor of this editor or
* <code>null</code> if none of the ancestors are a
* <code>JSpinner</code>.
* Typically the editor's parent is a <code>JSpinner</code> however
* subclasses of <code>JSpinner</code> may override the
* the <code>createEditor</code> method and insert one or more containers
* between the <code>JSpinner</code> and it's editor.
*
* @return <code>JSpinner</code> ancestor; <code>null</code>
* if none of the ancestors are a <code>JSpinner</code>
*
* @see JSpinner#createEditor
*/
public JSpinner getSpinner() {
for (Component c = this; c != null; c = c.getParent()) {
if (c instanceof JSpinner) {
return (JSpinner)c;
}
}
return null;
}
/**
* Returns the <code>JFormattedTextField</code> child of this
* editor. By default the text field is the first and only
* child of editor.
*
* @return the <code>JFormattedTextField</code> that gives the user
* access to the <code>SpinnerDateModel's</code> value.
* @see #getSpinner
* @see #getModel
*/
public JFormattedTextField getTextField() {
return (JFormattedTextField)getComponent(0);
}
/**
* This method is called when the spinner's model's state changes.
* It sets the <code>value</code> of the text field to the current
* value of the spinners model.
*
* @param e the <code>ChangeEvent</code> whose source is the
* <code>JSpinner</code> whose model has changed.
* @see #getTextField
* @see JSpinner#getValue
*/
public void stateChanged(ChangeEvent e) {
JSpinner spinner = (JSpinner)(e.getSource());
getTextField().setValue(spinner.getValue());
}
/**
* Called by the <code>JFormattedTextField</code>
* <code>PropertyChangeListener</code>. When the <code>"value"</code>
* property changes, which implies that the user has typed a new
* number, we set the value of the spinners model.
* <p>
* This class ignores <code>PropertyChangeEvents</code> whose
* source is not the <code>JFormattedTextField</code>, so subclasses
* may safely make <code>this</code> <code>DefaultEditor</code> a
* <code>PropertyChangeListener</code> on other objects.
*
* @param e the <code>PropertyChangeEvent</code> whose source is
* the <code>JFormattedTextField</code> created by this class.
* @see #getTextField
*/
public void propertyChange(PropertyChangeEvent e)
{
JSpinner spinner = getSpinner();
if (spinner == null) {
// Indicates we aren't installed anywhere.
return;
}
Object source = e.getSource();
String name = e.getPropertyName();
if (source instanceof JFormattedTextField) {
if ("value".equals(name)) {
Object lastValue = spinner.getValue();
// Try to set the new value
try {
spinner.setValue(getTextField().getValue());
} catch (IllegalArgumentException iae) {
// SpinnerModel didn't like new value, reset
try {
((JFormattedTextField)source).setValue(lastValue);
} catch (IllegalArgumentException iae2) {
// Still bogus, nothing else we can do, the
// SpinnerModel and JFormattedTextField are now out
// of sync.
}
}
} else if ("font".equals(name)) {
Object newfont = e.getNewValue();
if (newfont instanceof UIResource) {
// The text field font must match the JSpinner font if
// the text field font was not set by the user
Font font = spinner.getFont();
if (!newfont.equals(font)) {
getTextField().setFont(font == null ? null : new FontUIResource(font));
}
}
}
}
}
/**
* This <code>LayoutManager</code> method does nothing. We're
* only managing a single child and there's no support
* for layout constraints.
*
* @param name ignored
* @param child ignored
*/
public void addLayoutComponent(String name, Component child) {
}
/**
* This <code>LayoutManager</code> method does nothing. There
* isn't any per-child state.
*
* @param child ignored
*/
public void removeLayoutComponent(Component child) {
}
/**
* Returns the size of the parents insets.
*/
private Dimension insetSize(Container parent) {
Insets insets = parent.getInsets();
int w = insets.left + insets.right;
int h = insets.top + insets.bottom;
return new Dimension(w, h);
}
/**
* Returns the preferred size of first (and only) child plus the
* size of the parents insets.
*
* @param parent the Container that's managing the layout
* @return the preferred dimensions to lay out the subcomponents
* of the specified container.
*/
public Dimension preferredLayoutSize(Container parent) {
Dimension preferredSize = insetSize(parent);
if (parent.getComponentCount() > 0) {
Dimension childSize = getComponent(0).getPreferredSize();
preferredSize.width += childSize.width;
preferredSize.height += childSize.height;
}
return preferredSize;
}
/**
* Returns the minimum size of first (and only) child plus the
* size of the parents insets.
*
* @param parent the Container that's managing the layout
* @return the minimum dimensions needed to lay out the subcomponents
* of the specified container.
*/
public Dimension minimumLayoutSize(Container parent) {
Dimension minimumSize = insetSize(parent);
if (parent.getComponentCount() > 0) {
Dimension childSize = getComponent(0).getMinimumSize();
minimumSize.width += childSize.width;
minimumSize.height += childSize.height;
}
return minimumSize;
}
/**
* Resize the one (and only) child to completely fill the area
* within the parents insets.
*/
public void layoutContainer(Container parent) {
if (parent.getComponentCount() > 0) {
Insets insets = parent.getInsets();
int w = parent.getWidth() - (insets.left + insets.right);
int h = parent.getHeight() - (insets.top + insets.bottom);
getComponent(0).setBounds(insets.left, insets.top, w, h);
}
}
/**
* Pushes the currently edited value to the <code>SpinnerModel</code>.
* <p>
* The default implementation invokes <code>commitEdit</code> on the
* <code>JFormattedTextField</code>.
*
* @throws ParseException if the edited value is not legal
*/
public void commitEdit() throws ParseException {
// If the value in the JFormattedTextField is legal, this will have
// the result of pushing the value to the SpinnerModel
// by way of the <code>propertyChange</code> method.
JFormattedTextField ftf = getTextField();
ftf.commitEdit();
}
/**
* Returns the baseline.
*
* @throws IllegalArgumentException {@inheritDoc}
* @see javax.swing.JComponent#getBaseline(int,int)
* @see javax.swing.JComponent#getBaselineResizeBehavior()
* @since 1.6
*/
public int getBaseline(int width, int height) {
// check size.
super.getBaseline(width, height);
Insets insets = getInsets();
width = width - insets.left - insets.right;
height = height - insets.top - insets.bottom;
int baseline = getComponent(0).getBaseline(width, height);
if (baseline >= 0) {
return baseline + insets.top;
}
return -1;
}
/**
* Returns an enum indicating how the baseline of the component
* changes as the size changes.
*
* @throws NullPointerException {@inheritDoc}
* @see javax.swing.JComponent#getBaseline(int, int)
* @since 1.6
*/
public BaselineResizeBehavior getBaselineResizeBehavior() {
return getComponent(0).getBaselineResizeBehavior();
}
}
/**
* This subclass of javax.swing.DateFormatter maps the minimum/maximum
* properties to the start/end properties of a SpinnerDateModel.
*/
private static class DateEditorFormatter extends DateFormatter {
private final SpinnerDateModel model;
DateEditorFormatter(SpinnerDateModel model, DateFormat format) {
super(format);
this.model = model;
}
@Override
@SuppressWarnings("unchecked")
public void setMinimum(Comparable<?> min) {
model.setStart((Comparable<Date>)min);
}
@Override
public Comparable<Date> getMinimum() {
return model.getStart();
}
@Override
@SuppressWarnings("unchecked")
public void setMaximum(Comparable<?> max) {
model.setEnd((Comparable<Date>)max);
}
@Override
public Comparable<Date> getMaximum() {
return model.getEnd();
}
}
/**
* An editor for a <code>JSpinner</code> whose model is a
* <code>SpinnerDateModel</code>. The value of the editor is
* displayed with a <code>JFormattedTextField</code> whose format
* is defined by a <code>DateFormatter</code> instance whose
* <code>minimum</code> and <code>maximum</code> properties
* are mapped to the <code>SpinnerDateModel</code>.
* @since 1.4
*/
// PENDING(hmuller): more example javadoc
public static class DateEditor extends DefaultEditor
{
// This is here until SimpleDateFormat gets a constructor that
// takes a Locale: 4923525
private static String getDefaultPattern(Locale loc) {
LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(DateFormatProvider.class, loc);
LocaleResources lr = adapter.getLocaleResources(loc);
if (lr == null) {
lr = LocaleProviderAdapter.forJRE().getLocaleResources(loc);
}
return lr.getDateTimePattern(DateFormat.SHORT, DateFormat.SHORT, null);
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerDateModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>DateEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerDateModel</code>
*
* @see #getModel
* @see #getFormat
* @see SpinnerDateModel
*/
public DateEditor(JSpinner spinner) {
this(spinner, getDefaultPattern(spinner.getLocale()));
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerDateModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>DateEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @param dateFormatPattern the initial pattern for the
* <code>SimpleDateFormat</code> object that's used to display
* and parse the value of the text field.
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerDateModel</code>
*
* @see #getModel
* @see #getFormat
* @see SpinnerDateModel
* @see java.text.SimpleDateFormat
*/
public DateEditor(JSpinner spinner, String dateFormatPattern) {
this(spinner, new SimpleDateFormat(dateFormatPattern,
spinner.getLocale()));
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerDateModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>DateEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor
* will monitor
* @param format <code>DateFormat</code> object that's used to display
* and parse the value of the text field.
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerDateModel</code>
*
* @see #getModel
* @see #getFormat
* @see SpinnerDateModel
* @see java.text.SimpleDateFormat
*/
private DateEditor(JSpinner spinner, DateFormat format) {
super(spinner);
if (!(spinner.getModel() instanceof SpinnerDateModel)) {
throw new IllegalArgumentException(
"model not a SpinnerDateModel");
}
SpinnerDateModel model = (SpinnerDateModel)spinner.getModel();
DateFormatter formatter = new DateEditorFormatter(model, format);
DefaultFormatterFactory factory = new DefaultFormatterFactory(
formatter);
JFormattedTextField ftf = getTextField();
ftf.setEditable(true);
ftf.setFormatterFactory(factory);
/* TBD - initializing the column width of the text field
* is imprecise and doing it here is tricky because
* the developer may configure the formatter later.
*/
try {
String maxString = formatter.valueToString(model.getStart());
String minString = formatter.valueToString(model.getEnd());
ftf.setColumns(Math.max(maxString.length(),
minString.length()));
}
catch (ParseException e) {
// PENDING: hmuller
}
}
/**
* Returns the <code>java.text.SimpleDateFormat</code> object the
* <code>JFormattedTextField</code> uses to parse and format
* numbers.
*
* @return the value of <code>getTextField().getFormatter().getFormat()</code>.
* @see #getTextField
* @see java.text.SimpleDateFormat
*/
public SimpleDateFormat getFormat() {
return (SimpleDateFormat)((DateFormatter)(getTextField().getFormatter())).getFormat();
}
/**
* Return our spinner ancestor's <code>SpinnerDateModel</code>.
*
* @return <code>getSpinner().getModel()</code>
* @see #getSpinner
* @see #getTextField
*/
public SpinnerDateModel getModel() {
return (SpinnerDateModel)(getSpinner().getModel());
}
}
/**
* This subclass of javax.swing.NumberFormatter maps the minimum/maximum
* properties to a SpinnerNumberModel and initializes the valueClass
* of the NumberFormatter to match the type of the initial models value.
*/
private static class NumberEditorFormatter extends NumberFormatter {
private final SpinnerNumberModel model;
NumberEditorFormatter(SpinnerNumberModel model, NumberFormat format) {
super(format);
this.model = model;
setValueClass(model.getValue().getClass());
}
@Override
public void setMinimum(Comparable<?> min) {
model.setMinimum(min);
}
@Override
public Comparable<?> getMinimum() {
return model.getMinimum();
}
@Override
public void setMaximum(Comparable<?> max) {
model.setMaximum(max);
}
@Override
public Comparable<?> getMaximum() {
return model.getMaximum();
}
}
/**
* An editor for a <code>JSpinner</code> whose model is a
* <code>SpinnerNumberModel</code>. The value of the editor is
* displayed with a <code>JFormattedTextField</code> whose format
* is defined by a <code>NumberFormatter</code> instance whose
* <code>minimum</code> and <code>maximum</code> properties
* are mapped to the <code>SpinnerNumberModel</code>.
* @since 1.4
*/
// PENDING(hmuller): more example javadoc
public static class NumberEditor extends DefaultEditor
{
// This is here until DecimalFormat gets a constructor that
// takes a Locale: 4923525
private static String getDefaultPattern(Locale locale) {
// Get the pattern for the default locale.
LocaleProviderAdapter adapter;
adapter = LocaleProviderAdapter.getAdapter(NumberFormatProvider.class,
locale);
LocaleResources lr = adapter.getLocaleResources(locale);
if (lr == null) {
lr = LocaleProviderAdapter.forJRE().getLocaleResources(locale);
}
String[] all = lr.getNumberPatterns();
return all[0];
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerNumberModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>NumberEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerNumberModel</code>
*
* @see #getModel
* @see #getFormat
* @see SpinnerNumberModel
*/
public NumberEditor(JSpinner spinner) {
this(spinner, getDefaultPattern(spinner.getLocale()));
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerNumberModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>NumberEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @param decimalFormatPattern the initial pattern for the
* <code>DecimalFormat</code> object that's used to display
* and parse the value of the text field.
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerNumberModel</code> or if
* <code>decimalFormatPattern</code> is not a legal
* argument to <code>DecimalFormat</code>
*
* @see #getTextField
* @see SpinnerNumberModel
* @see java.text.DecimalFormat
*/
public NumberEditor(JSpinner spinner, String decimalFormatPattern) {
this(spinner, new DecimalFormat(decimalFormatPattern));
}
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerNumberModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>NumberEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @param format the initial pattern for the
* <code>DecimalFormat</code> object that's used to display
* and parse the value of the text field.
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerNumberModel</code>
*
* @see #getTextField
* @see SpinnerNumberModel
* @see java.text.DecimalFormat
*/
private NumberEditor(JSpinner spinner, DecimalFormat format) {
super(spinner);
if (!(spinner.getModel() instanceof SpinnerNumberModel)) {
throw new IllegalArgumentException(
"model not a SpinnerNumberModel");
}
SpinnerNumberModel model = (SpinnerNumberModel)spinner.getModel();
NumberFormatter formatter = new NumberEditorFormatter(model,
format);
DefaultFormatterFactory factory = new DefaultFormatterFactory(
formatter);
JFormattedTextField ftf = getTextField();
ftf.setEditable(true);
ftf.setFormatterFactory(factory);
// Change the text orientation for the NumberEditor
ftf.setHorizontalAlignment(JTextField.RIGHT);
/* TBD - initializing the column width of the text field
* is imprecise and doing it here is tricky because
* the developer may configure the formatter later.
*/
try {
String maxString = formatter.valueToString(model.getMinimum());
String minString = formatter.valueToString(model.getMaximum());
ftf.setColumns(Math.max(maxString.length(),
minString.length()));
}
catch (ParseException e) {
// TBD should throw a chained error here
}
}
/**
* Returns the <code>java.text.DecimalFormat</code> object the
* <code>JFormattedTextField</code> uses to parse and format
* numbers.
*
* @return the value of <code>getTextField().getFormatter().getFormat()</code>.
* @see #getTextField
* @see java.text.DecimalFormat
*/
public DecimalFormat getFormat() {
return (DecimalFormat)((NumberFormatter)(getTextField().getFormatter())).getFormat();
}
/**
* Return our spinner ancestor's <code>SpinnerNumberModel</code>.
*
* @return <code>getSpinner().getModel()</code>
* @see #getSpinner
* @see #getTextField
*/
public SpinnerNumberModel getModel() {
return (SpinnerNumberModel)(getSpinner().getModel());
}
/**
* {@inheritDoc}
*/
@Override
public void setComponentOrientation(ComponentOrientation o) {
super.setComponentOrientation(o);
getTextField().setHorizontalAlignment(
o.isLeftToRight() ? JTextField.RIGHT : JTextField.LEFT);
}
}
/**
* An editor for a <code>JSpinner</code> whose model is a
* <code>SpinnerListModel</code>.
* @since 1.4
*/
public static class ListEditor extends DefaultEditor
{
/**
* Construct a <code>JSpinner</code> editor that supports displaying
* and editing the value of a <code>SpinnerListModel</code>
* with a <code>JFormattedTextField</code>. <code>This</code>
* <code>ListEditor</code> becomes both a <code>ChangeListener</code>
* on the spinner and a <code>PropertyChangeListener</code>
* on the new <code>JFormattedTextField</code>.
*
* @param spinner the spinner whose model <code>this</code> editor will monitor
* @exception IllegalArgumentException if the spinners model is not
* an instance of <code>SpinnerListModel</code>
*
* @see #getModel
* @see SpinnerListModel
*/
public ListEditor(JSpinner spinner) {
super(spinner);
if (!(spinner.getModel() instanceof SpinnerListModel)) {
throw new IllegalArgumentException("model not a SpinnerListModel");
}
getTextField().setEditable(true);
getTextField().setFormatterFactory(new
DefaultFormatterFactory(new ListFormatter()));
}
/**
* Return our spinner ancestor's <code>SpinnerNumberModel</code>.
*
* @return <code>getSpinner().getModel()</code>
* @see #getSpinner
* @see #getTextField
*/
public SpinnerListModel getModel() {
return (SpinnerListModel)(getSpinner().getModel());
}
/**
* ListFormatter provides completion while text is being input
* into the JFormattedTextField. Completion is only done if the
* user is inserting text at the end of the document. Completion
* is done by way of the SpinnerListModel method findNextMatch.
*/
private class ListFormatter extends
JFormattedTextField.AbstractFormatter {
private DocumentFilter filter;
public String valueToString(Object value) throws ParseException {
if (value == null) {
return "";
}
return value.toString();
}
public Object stringToValue(String string) throws ParseException {
return string;
}
protected DocumentFilter getDocumentFilter() {
if (filter == null) {
filter = new Filter();
}
return filter;
}
private class Filter extends DocumentFilter {
public void replace(FilterBypass fb, int offset, int length,
String string, AttributeSet attrs) throws
BadLocationException {
if (string != null && (offset + length) ==
fb.getDocument().getLength()) {
Object next = getModel().findNextMatch(
fb.getDocument().getText(0, offset) +
string);
String value = (next != null) ? next.toString() : null;
if (value != null) {
fb.remove(0, offset + length);
fb.insertString(0, value, null);
getFormattedTextField().select(offset +
string.length(),
value.length());
return;
}
}
super.replace(fb, offset, length, string, attrs);
}
public void insertString(FilterBypass fb, int offset,
String string, AttributeSet attr)
throws BadLocationException {
replace(fb, offset, 0, string, attr);
}
}
}
}
/**
* An Action implementation that is always disabled.
*/
private static class DisabledAction implements Action {
public Object getValue(String key) {
return null;
}
public void putValue(String key, Object value) {
}
public void setEnabled(boolean b) {
}
public boolean isEnabled() {
return false;
}
public void addPropertyChangeListener(PropertyChangeListener l) {
}
public void removePropertyChangeListener(PropertyChangeListener l) {
}
public void actionPerformed(ActionEvent ae) {
}
}
/////////////////
// Accessibility support
////////////////
/**
* Gets the <code>AccessibleContext</code> for the <code>JSpinner</code>
*
* @return the <code>AccessibleContext</code> for the <code>JSpinner</code>
* @since 1.5
*/
@BeanProperty(bound = false)
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleJSpinner();
}
return accessibleContext;
}
/**
* <code>AccessibleJSpinner</code> implements accessibility
* support for the <code>JSpinner</code> class.
* @since 1.5
*/
protected class AccessibleJSpinner extends AccessibleJComponent
implements AccessibleValue, AccessibleAction, AccessibleText,
AccessibleEditableText, ChangeListener {
private Object oldModelValue = null;
/**
* AccessibleJSpinner constructor
*/
protected AccessibleJSpinner() {
// model is guaranteed to be non-null
oldModelValue = model.getValue();
JSpinner.this.addChangeListener(this);
}
/**
* Invoked when the target of the listener has changed its state.
*
* @param e a <code>ChangeEvent</code> object. Must not be null.
* @throws NullPointerException if the parameter is null.
*/
public void stateChanged(ChangeEvent e) {
if (e == null) {
throw new NullPointerException();
}
Object newModelValue = model.getValue();
firePropertyChange(ACCESSIBLE_VALUE_PROPERTY,
oldModelValue,
newModelValue);
firePropertyChange(ACCESSIBLE_TEXT_PROPERTY,
null,
0); // entire text may have changed
oldModelValue = newModelValue;
}
/* ===== Begin AccessibleContext methods ===== */
/**
* Gets the role of this object. The role of the object is the generic
* purpose or use of the class of this object. For example, the role
* of a push button is AccessibleRole.PUSH_BUTTON. The roles in
* AccessibleRole are provided so component developers can pick from
* a set of predefined roles. This enables assistive technologies to
* provide a consistent interface to various tweaked subclasses of
* components (e.g., use AccessibleRole.PUSH_BUTTON for all components
* that act like a push button) as well as distinguish between subclasses
* that behave differently (e.g., AccessibleRole.CHECK_BOX for check boxes
* and AccessibleRole.RADIO_BUTTON for radio buttons).
* <p>Note that the AccessibleRole class is also extensible, so
* custom component developers can define their own AccessibleRole's
* if the set of predefined roles is inadequate.
*
* @return an instance of AccessibleRole describing the role of the object
* @see AccessibleRole
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.SPIN_BOX;
}
/**
* Returns the number of accessible children of the object.
*
* @return the number of accessible children of the object.
*/
public int getAccessibleChildrenCount() {
// the JSpinner has one child, the editor
if (editor.getAccessibleContext() != null) {
return 1;
}
return 0;
}
/**
* Returns the specified Accessible child of the object. The Accessible
* children of an Accessible object are zero-based, so the first child
* of an Accessible child is at index 0, the second child is at index 1,
* and so on.
*
* @param i zero-based index of child
* @return the Accessible child of the object
* @see #getAccessibleChildrenCount
*/
public Accessible getAccessibleChild(int i) {
// the JSpinner has one child, the editor
if (i != 0) {
return null;
}
if (editor.getAccessibleContext() != null) {
return (Accessible)editor;
}
return null;
}
/* ===== End AccessibleContext methods ===== */
/**
* Gets the AccessibleAction associated with this object that supports
* one or more actions.
*
* @return AccessibleAction if supported by object; else return null
* @see AccessibleAction
*/
public AccessibleAction getAccessibleAction() {
return this;
}
/**
* Gets the AccessibleText associated with this object presenting
* text on the display.
*
* @return AccessibleText if supported by object; else return null
* @see AccessibleText
*/
public AccessibleText getAccessibleText() {
return this;
}
/*
* Returns the AccessibleContext for the JSpinner editor
*/
private AccessibleContext getEditorAccessibleContext() {
if (editor instanceof DefaultEditor) {
JTextField textField = ((DefaultEditor)editor).getTextField();
if (textField != null) {
return textField.getAccessibleContext();
}
} else if (editor instanceof Accessible) {
return editor.getAccessibleContext();
}
return null;
}
/*
* Returns the AccessibleText for the JSpinner editor
*/
private AccessibleText getEditorAccessibleText() {
AccessibleContext ac = getEditorAccessibleContext();
if (ac != null) {
return ac.getAccessibleText();
}
return null;
}
/*
* Returns the AccessibleEditableText for the JSpinner editor
*/
private AccessibleEditableText getEditorAccessibleEditableText() {
AccessibleText at = getEditorAccessibleText();
if (at instanceof AccessibleEditableText) {
return (AccessibleEditableText)at;
}
return null;
}
/**
* Gets the AccessibleValue associated with this object.
*
* @return AccessibleValue if supported by object; else return null
* @see AccessibleValue
*
*/
public AccessibleValue getAccessibleValue() {
return this;
}
/* ===== Begin AccessibleValue impl ===== */
/**
* Get the value of this object as a Number. If the value has not been
* set, the return value will be null.
*
* @return value of the object
* @see #setCurrentAccessibleValue
*/
public Number getCurrentAccessibleValue() {
Object o = model.getValue();
if (o instanceof Number) {
return (Number)o;
}
return null;
}
/**
* Set the value of this object as a Number.
*
* @param n the value to set for this object
* @return true if the value was set; else False
* @see #getCurrentAccessibleValue
*/
public boolean setCurrentAccessibleValue(Number n) {
// try to set the new value
try {
model.setValue(n);
return true;
} catch (IllegalArgumentException iae) {
// SpinnerModel didn't like new value
}
return false;
}
/**
* Get the minimum value of this object as a Number.
*
* @return Minimum value of the object; null if this object does not
* have a minimum value
* @see #getMaximumAccessibleValue
*/
public Number getMinimumAccessibleValue() {
if (model instanceof SpinnerNumberModel) {
SpinnerNumberModel numberModel = (SpinnerNumberModel)model;
Object o = numberModel.getMinimum();
if (o instanceof Number) {
return (Number)o;
}
}
return null;
}
/**
* Get the maximum value of this object as a Number.
*
* @return Maximum value of the object; null if this object does not
* have a maximum value
* @see #getMinimumAccessibleValue
*/
public Number getMaximumAccessibleValue() {
if (model instanceof SpinnerNumberModel) {
SpinnerNumberModel numberModel = (SpinnerNumberModel)model;
Object o = numberModel.getMaximum();
if (o instanceof Number) {
return (Number)o;
}
}
return null;
}
/* ===== End AccessibleValue impl ===== */
/* ===== Begin AccessibleAction impl ===== */
/**
* Returns the number of accessible actions available in this object
* If there are more than one, the first one is considered the "default"
* action of the object.
*
* Two actions are supported: AccessibleAction.INCREMENT which
* increments the spinner value and AccessibleAction.DECREMENT
* which decrements the spinner value
*
* @return the zero-based number of Actions in this object
*/
public int getAccessibleActionCount() {
return 2;
}
/**
* Returns a description of the specified action of the object.
*
* @param i zero-based index of the actions
* @return a String description of the action
* @see #getAccessibleActionCount
*/
public String getAccessibleActionDescription(int i) {
if (i == 0) {
return AccessibleAction.INCREMENT;
} else if (i == 1) {
return AccessibleAction.DECREMENT;
}
return null;
}
/**
* Performs the specified Action on the object
*
* @param i zero-based index of actions. The first action
* (index 0) is AccessibleAction.INCREMENT and the second
* action (index 1) is AccessibleAction.DECREMENT.
* @return true if the action was performed; otherwise false.
* @see #getAccessibleActionCount
*/
public boolean doAccessibleAction(int i) {
if (i < 0 || i > 1) {
return false;
}
Object o;
if (i == 0) {
o = getNextValue(); // AccessibleAction.INCREMENT
} else {
o = getPreviousValue(); // AccessibleAction.DECREMENT
}
// try to set the new value
try {
model.setValue(o);
return true;
} catch (IllegalArgumentException iae) {
// SpinnerModel didn't like new value
}
return false;
}
/* ===== End AccessibleAction impl ===== */
/* ===== Begin AccessibleText impl ===== */
/*
* Returns whether source and destination components have the
* same window ancestor
*/
private boolean sameWindowAncestor(Component src, Component dest) {
if (src == null || dest == null) {
return false;
}
return SwingUtilities.getWindowAncestor(src) ==
SwingUtilities.getWindowAncestor(dest);
}
/**
* Given a point in local coordinates, return the zero-based index
* of the character under that Point. If the point is invalid,
* this method returns -1.
*
* @param p the Point in local coordinates
* @return the zero-based index of the character under Point p; if
* Point is invalid return -1.
*/
public int getIndexAtPoint(Point p) {
AccessibleText at = getEditorAccessibleText();
if (at != null && sameWindowAncestor(JSpinner.this, editor)) {
// convert point from the JSpinner bounds (source) to
// editor bounds (destination)
Point editorPoint = SwingUtilities.convertPoint(JSpinner.this,
p,
editor);
if (editorPoint != null) {
return at.getIndexAtPoint(editorPoint);
}
}
return -1;
}
/**
* Determines the bounding box of the character at the given
* index into the string. The bounds are returned in local
* coordinates. If the index is invalid an empty rectangle is
* returned.
*
* @param i the index into the String
* @return the screen coordinates of the character's bounding box,
* if index is invalid return an empty rectangle.
*/
public Rectangle getCharacterBounds(int i) {
AccessibleText at = getEditorAccessibleText();
if (at != null ) {
Rectangle editorRect = at.getCharacterBounds(i);
if (editorRect != null &&
sameWindowAncestor(JSpinner.this, editor)) {
// return rectangle in the JSpinner bounds
return SwingUtilities.convertRectangle(editor,
editorRect,
JSpinner.this);
}
}
return null;
}
/**
* Returns the number of characters (valid indicies)
*
* @return the number of characters
*/
public int getCharCount() {
AccessibleText at = getEditorAccessibleText();
if (at != null) {
return at.getCharCount();
}
return -1;
}
/**
* Returns the zero-based offset of the caret.
*
* Note: That to the right of the caret will have the same index
* value as the offset (the caret is between two characters).
* @return the zero-based offset of the caret.
*/
public int getCaretPosition() {
AccessibleText at = getEditorAccessibleText();
if (at != null) {
return at.getCaretPosition();
}
return -1;
}
/**
* Returns the String at a given index.
*
* @param part the CHARACTER, WORD, or SENTENCE to retrieve
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