41 |
import java.awt.Color; |
import java.awt.Color; |
42 |
import java.awt.Component; |
import java.awt.Component; |
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import java.awt.ComponentOrientation; |
import java.awt.ComponentOrientation; |
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import java.awt.Cursor; |
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import java.awt.Dimension; |
import java.awt.Dimension; |
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import java.awt.Font; |
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import java.awt.FontMetrics; |
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import java.awt.Point; |
import java.awt.Point; |
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import java.awt.Rectangle; |
import java.awt.Rectangle; |
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import java.awt.event.FocusListener; |
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import java.beans.PropertyChangeEvent; |
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import java.beans.PropertyChangeListener; |
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import java.util.Locale; |
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import java.util.Vector; |
import java.util.Vector; |
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|
56 |
import javax.accessibility.Accessible; |
import javax.accessibility.Accessible; |
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import javax.accessibility.AccessibleComponent; |
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import javax.accessibility.AccessibleContext; |
import javax.accessibility.AccessibleContext; |
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import javax.accessibility.AccessibleRole; |
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import javax.accessibility.AccessibleSelection; |
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import javax.accessibility.AccessibleState; |
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import javax.accessibility.AccessibleStateSet; |
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import javax.swing.event.ListDataEvent; |
import javax.swing.event.ListDataEvent; |
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import javax.swing.event.ListDataListener; |
import javax.swing.event.ListDataListener; |
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import javax.swing.event.ListSelectionEvent; |
import javax.swing.event.ListSelectionEvent; |
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|
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public class JList extends JComponent implements Accessible, Scrollable |
public class JList extends JComponent implements Accessible, Scrollable |
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{ |
{ |
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|
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/** |
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* Provides accessibility support for <code>JList</code>. |
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*/ |
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protected class AccessibleJList extends AccessibleJComponent |
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implements AccessibleSelection, PropertyChangeListener, |
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ListSelectionListener, ListDataListener |
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{ |
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|
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/** |
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* Provides accessibility support for list elements in <code>JList</code>s. |
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*/ |
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protected class AccessibleJListChild extends AccessibleContext |
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implements Accessible, AccessibleComponent |
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{ |
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|
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/** |
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* The parent list. |
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*/ |
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JList parent; |
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|
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/** |
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* The index in the list for that child. |
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*/ |
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int listIndex; |
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|
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/** |
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* The cursor for this list child. |
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*/ |
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// TODO: Testcases show that this class somehow stores state about the |
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// cursor. I cannot make up though how that could affect |
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// the actual list. |
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Cursor cursor = Cursor.getDefaultCursor(); |
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|
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/** |
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* Creates a new instance of <code>AccessibleJListChild</code>. |
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* |
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* @param list the list of which this is an accessible child |
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* @param index the list index for this child |
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*/ |
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public AccessibleJListChild(JList list, int index) |
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{ |
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parent = list; |
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listIndex = index; |
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} |
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|
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/** |
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* Returns the accessible context of this object. Returns |
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* <code>this</code> since <code>AccessibleJListChild</code>s are their |
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* own accessible contexts. |
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* |
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* @return the accessible context of this object, <code>this</code> |
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*/ |
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public AccessibleContext getAccessibleContext() |
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{ |
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return this; |
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} |
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|
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/** |
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* Returns the background color for this list child. This returns the |
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* background of the <code>JList</code> itself since the background |
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* cannot be set on list children individually |
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* |
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* @return the background color for this list child |
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*/ |
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public Color getBackground() |
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{ |
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return parent.getBackground(); |
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} |
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|
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/** |
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* Calling this method has no effect, since the background color cannot be |
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* set on list children individually. |
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* |
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* @param color not used here. |
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*/ |
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public void setBackground(Color color) |
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{ |
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// Calling this method has no effect, since the background color cannot |
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// be set on list children individually. |
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} |
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|
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/** |
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* Returns the foreground color for this list child. This returns the |
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* background of the <code>JList</code> itself since the foreground |
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* cannot be set on list children individually. |
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* |
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* @return the background color for this list child |
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*/ |
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public Color getForeground() |
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{ |
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return parent.getForeground(); |
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} |
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|
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/** |
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* Calling this method has no effect, since the foreground color cannot be |
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* set on list children individually. |
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* |
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* @param color not used here. |
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*/ |
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public void setForeground(Color color) |
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{ |
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// Calling this method has no effect, since the foreground color cannot |
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// be set on list children individually. |
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} |
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|
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/** |
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* Returns the cursor for this list child. |
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* |
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* @return the cursor for this list child |
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*/ |
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public Cursor getCursor() |
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{ |
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// TODO: Testcases show that this method returns the cursor that has |
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// been set by setCursor. I cannot make up though how that could affect |
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// the actual list. |
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return cursor; |
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} |
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|
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/** |
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* Sets the cursor for this list child. |
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*/ |
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public void setCursor(Cursor cursor) |
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{ |
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this.cursor = cursor; |
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// TODO: Testcases show that this method returns the cursor that has |
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// been set by setCursor. I cannot make up though how that could affect |
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// the actual list. |
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} |
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|
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/** |
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* Returns the font of the <code>JList</code> since it is not possible to |
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* set fonts for list children individually. |
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* |
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* @return the font of the <code>JList</code> |
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*/ |
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public Font getFont() |
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{ |
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return parent.getFont(); |
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} |
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|
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/** |
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* Does nothing since it is not possible to set the font on list children |
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* individually. |
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* |
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* @param font not used here |
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*/ |
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public void setFont(Font font) |
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{ |
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// Does nothing since it is not possible to set the font on list |
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// children individually. |
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} |
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|
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/** |
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* Returns the font metrics for the specified font. This method forwards |
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* to the parent <code>JList</code>. |
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* |
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* @param font the font for which the font metrics is queried |
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* |
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* @return the font metrics for the specified font |
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*/ |
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public FontMetrics getFontMetrics(Font font) |
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{ |
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return parent.getFontMetrics(font); |
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} |
288 |
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|
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/** |
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* Returns <code>true</code> if the parent <code>JList</code> is enabled, |
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* <code>false</code> otherwise. The list children cannot have an enabled |
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* flag set individually. |
293 |
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* |
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* @return <code>true</code> if the parent <code>JList</code> is enabled, |
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* <code>false</code> otherwise |
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*/ |
297 |
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public boolean isEnabled() |
298 |
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{ |
299 |
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return parent.isEnabled(); |
300 |
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} |
301 |
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|
302 |
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/** |
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* Does nothing since the enabled flag cannot be set for list children |
304 |
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* individually. |
305 |
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* |
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* @param b not used here |
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*/ |
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public void setEnabled(boolean b) |
309 |
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{ |
310 |
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// Does nothing since the enabled flag cannot be set for list children |
311 |
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// individually. |
312 |
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} |
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|
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/** |
315 |
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* Returns <code>true</code> if this list child is visible, |
316 |
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* <code>false</code> otherwise. The value of this property depends |
317 |
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* on {@link JList#getFirstVisibleIndex()} and |
318 |
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* {@link JList#getLastVisibleIndex()}. |
319 |
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* |
320 |
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* @return <code>true</code> if this list child is visible, |
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* <code>false</code> otherwise |
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*/ |
323 |
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public boolean isVisible() |
324 |
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{ |
325 |
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return listIndex >= parent.getFirstVisibleIndex() |
326 |
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&& listIndex <= parent.getLastVisibleIndex(); |
327 |
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} |
328 |
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|
329 |
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/** |
330 |
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* The value of the visible property cannot be modified, so this method |
331 |
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* does nothing. |
332 |
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* |
333 |
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* @param b not used here |
334 |
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*/ |
335 |
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public void setVisible(boolean b) |
336 |
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{ |
337 |
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// The value of the visible property cannot be modified, so this method |
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// does nothing. |
339 |
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} |
340 |
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|
341 |
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/** |
342 |
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* Returns <code>true</code> if this list child is currently showing on |
343 |
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* screen and <code>false</code> otherwise. The list child is showing if |
344 |
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* it is visible and if it's parent JList is currently showing. |
345 |
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* |
346 |
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* @return <code>true</code> if this list child is currently showing on |
347 |
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* screen and <code>false</code> otherwise |
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*/ |
349 |
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public boolean isShowing() |
350 |
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{ |
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return isVisible() && parent.isShowing(); |
352 |
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} |
353 |
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|
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/** |
355 |
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* Returns <code>true</code> if this list child covers the screen location |
356 |
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* <code>point</code> (relative to the <code>JList</code> coordinate |
357 |
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* system, <code>false</code> otherwise. |
358 |
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* |
359 |
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* @return <code>true</code> if this list child covers the screen location |
360 |
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* <code>point</code> , <code>false</code> otherwise |
361 |
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*/ |
362 |
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public boolean contains(Point point) |
363 |
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{ |
364 |
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return getBounds().contains(point); |
365 |
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} |
366 |
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|
367 |
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/** |
368 |
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* Returns the absolute screen location of this list child. |
369 |
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* |
370 |
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* @return the absolute screen location of this list child |
371 |
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*/ |
372 |
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public Point getLocationOnScreen() |
373 |
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{ |
374 |
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Point loc = getLocation(); |
375 |
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SwingUtilities.convertPointToScreen(loc, parent); |
376 |
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return loc; |
377 |
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} |
378 |
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|
379 |
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/** |
380 |
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* Returns the screen location of this list child relative to it's parent. |
381 |
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* |
382 |
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* @return the location of this list child relative to it's parent |
383 |
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* |
384 |
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* @see JList#indexToLocation(int) |
385 |
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*/ |
386 |
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public Point getLocation() |
387 |
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{ |
388 |
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return parent.indexToLocation(listIndex); |
389 |
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} |
390 |
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|
391 |
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/** |
392 |
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* Does nothing since the screen location cannot be set on list children |
393 |
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* explictitly. |
394 |
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* |
395 |
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* @param point not used here |
396 |
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*/ |
397 |
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public void setLocation(Point point) |
398 |
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{ |
399 |
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// Does nothing since the screen location cannot be set on list children |
400 |
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// explictitly. |
401 |
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} |
402 |
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|
403 |
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/** |
404 |
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* Returns the bounds of this list child. |
405 |
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* |
406 |
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* @return the bounds of this list child |
407 |
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* |
408 |
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* @see JList#getCellBounds(int, int) |
409 |
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*/ |
410 |
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public Rectangle getBounds() |
411 |
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{ |
412 |
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return parent.getCellBounds(listIndex, listIndex); |
413 |
|
} |
414 |
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|
415 |
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/** |
416 |
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* Does nothing since the bounds cannot be set on list children |
417 |
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* individually. |
418 |
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* |
419 |
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* @param rectangle not used here |
420 |
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*/ |
421 |
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public void setBounds(Rectangle rectangle) |
422 |
|
{ |
423 |
|
// Does nothing since the bounds cannot be set on list children |
424 |
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// individually. |
425 |
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} |
426 |
|
|
427 |
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/** |
428 |
|
* Returns the size of this list child. |
429 |
|
* |
430 |
|
* @return the size of this list child |
431 |
|
*/ |
432 |
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public Dimension getSize() |
433 |
|
{ |
434 |
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Rectangle b = getBounds(); |
435 |
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return b.getSize(); |
436 |
|
} |
437 |
|
|
438 |
|
/** |
439 |
|
* Does nothing since the size cannot be set on list children |
440 |
|
* individually. |
441 |
|
* |
442 |
|
* @param dimension not used here |
443 |
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*/ |
444 |
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public void setSize(Dimension dimension) |
445 |
|
{ |
446 |
|
// Does nothing since the size cannot be set on list children |
447 |
|
// individually. |
448 |
|
} |
449 |
|
|
450 |
|
/** |
451 |
|
* Returns <code>null</code> because list children do not have children |
452 |
|
* themselves |
453 |
|
* |
454 |
|
* @return <code>null</code> |
455 |
|
*/ |
456 |
|
public Accessible getAccessibleAt(Point point) |
457 |
|
{ |
458 |
|
return null; |
459 |
|
} |
460 |
|
|
461 |
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/** |
462 |
|
* Returns <code>true</code> since list children are focus traversable. |
463 |
|
* |
464 |
|
* @return true |
465 |
|
*/ |
466 |
|
public boolean isFocusTraversable() |
467 |
|
{ |
468 |
|
// TODO: Is this 100% ok? |
469 |
|
return true; |
470 |
|
} |
471 |
|
|
472 |
|
/** |
473 |
|
* Requests focus on the parent list. List children cannot request focus |
474 |
|
* individually. |
475 |
|
*/ |
476 |
|
public void requestFocus() |
477 |
|
{ |
478 |
|
// TODO: Is this 100% ok? |
479 |
|
parent.requestFocus(); |
480 |
|
} |
481 |
|
|
482 |
|
/** |
483 |
|
* Adds a focus listener to the parent list. List children do not have |
484 |
|
* their own focus management. |
485 |
|
* |
486 |
|
* @param listener the focus listener to add |
487 |
|
*/ |
488 |
|
public void addFocusListener(FocusListener listener) |
489 |
|
{ |
490 |
|
// TODO: Is this 100% ok? |
491 |
|
parent.addFocusListener(listener); |
492 |
|
} |
493 |
|
|
494 |
|
/** |
495 |
|
* Removes a focus listener from the parent list. List children do not |
496 |
|
* have their own focus management. |
497 |
|
* |
498 |
|
* @param listener the focus listener to remove |
499 |
|
*/ |
500 |
|
public void removeFocusListener(FocusListener listener) |
501 |
|
{ |
502 |
|
// TODO: Is this 100% |
503 |
|
parent.removeFocusListener(listener); |
504 |
|
} |
505 |
|
|
506 |
|
/** |
507 |
|
* Returns the accessible role of this list item, which is |
508 |
|
* {@link AccessibleRole#LABEL}. |
509 |
|
* |
510 |
|
* @return {@link AccessibleRole#LABEL} |
511 |
|
*/ |
512 |
|
public AccessibleRole getAccessibleRole() |
513 |
|
{ |
514 |
|
return AccessibleRole.LABEL; |
515 |
|
} |
516 |
|
|
517 |
|
/** |
518 |
|
* Returns the accessible state set of this list item. |
519 |
|
* |
520 |
|
* @return the accessible state set of this list item |
521 |
|
*/ |
522 |
|
public AccessibleStateSet getAccessibleStateSet() |
523 |
|
{ |
524 |
|
AccessibleStateSet states = new AccessibleStateSet(); |
525 |
|
if (isVisible()) |
526 |
|
states.add(AccessibleState.VISIBLE); |
527 |
|
if (isShowing()) |
528 |
|
states.add(AccessibleState.SHOWING); |
529 |
|
if (isFocusTraversable()) |
530 |
|
states.add(AccessibleState.FOCUSABLE); |
531 |
|
// TODO: How should the active state be handled? The API docs |
532 |
|
// suggest that this state is set on the activated list child, |
533 |
|
// that is the one that is drawn with a box. However, I don't know how |
534 |
|
// to implement this. |
535 |
|
|
536 |
|
// TODO: We set the selectable state here because list children are |
537 |
|
// selectable. Is there a way to disable single children? |
538 |
|
if (parent.isEnabled()) |
539 |
|
states.add(AccessibleState.SELECTABLE); |
540 |
|
|
541 |
|
if (parent.isSelectedIndex(listIndex)) |
542 |
|
states.add(AccessibleState.SELECTED); |
543 |
|
|
544 |
|
// TODO: Handle more states here? |
545 |
|
return states; |
546 |
|
} |
547 |
|
|
548 |
|
/** |
549 |
|
* Returns the index of this list child within it's parent list. |
550 |
|
* |
551 |
|
* @return the index of this list child within it's parent list |
552 |
|
*/ |
553 |
|
public int getAccessibleIndexInParent() |
554 |
|
{ |
555 |
|
return listIndex; |
556 |
|
} |
557 |
|
|
558 |
|
/** |
559 |
|
* Returns <code>0</code> since list children don't have children |
560 |
|
* themselves. |
561 |
|
* |
562 |
|
* @return <code>0</code> |
563 |
|
*/ |
564 |
|
public int getAccessibleChildrenCount() |
565 |
|
{ |
566 |
|
return 0; |
567 |
|
} |
568 |
|
|
569 |
|
/** |
570 |
|
* Returns <code>null</code> since list children don't have children |
571 |
|
* themselves. |
572 |
|
* |
573 |
|
* @return <code>null</code> |
574 |
|
*/ |
575 |
|
public Accessible getAccessibleChild(int i) |
576 |
|
{ |
577 |
|
return null; |
578 |
|
} |
579 |
|
|
580 |
|
/** |
581 |
|
* Returns the locale of this component. This call is forwarded to the |
582 |
|
* parent list since list children don't have a separate locale setting. |
583 |
|
* |
584 |
|
* @return the locale of this component |
585 |
|
*/ |
586 |
|
public Locale getLocale() |
587 |
|
{ |
588 |
|
return parent.getLocale(); |
589 |
|
} |
590 |
|
|
591 |
|
/** |
592 |
|
* This method does |
593 |
|
* nothing, list children are transient accessible objects which means |
594 |
|
* that they don't fire property change events. |
595 |
|
* |
596 |
|
* @param l not used here |
597 |
|
*/ |
598 |
|
public void addPropertyChangeListener(PropertyChangeListener l) |
599 |
|
{ |
600 |
|
// Do nothing here. |
601 |
|
} |
602 |
|
|
603 |
|
/** |
604 |
|
* This method does |
605 |
|
* nothing, list children are transient accessible objects which means |
606 |
|
* that they don't fire property change events. |
607 |
|
* |
608 |
|
* @param l not used here |
609 |
|
*/ |
610 |
|
public void removePropertyChangeListener(PropertyChangeListener l) |
611 |
|
{ |
612 |
|
// Do nothing here. |
613 |
|
} |
614 |
|
|
615 |
|
// TODO: Implement the remaining methods of this class. |
616 |
|
} |
617 |
|
|
618 |
|
/** |
619 |
|
* Returns the number of selected accessible children. |
620 |
|
* |
621 |
|
* @return the number of selected accessible children |
622 |
|
*/ |
623 |
|
public int getAccessibleSelectionCount() |
624 |
|
{ |
625 |
|
return getSelectedIndices().length; |
626 |
|
} |
627 |
|
|
628 |
|
/** |
629 |
|
* Returns the n-th selected accessible child. |
630 |
|
* |
631 |
|
* @param n the index of the selected child to return |
632 |
|
* |
633 |
|
* @return the n-th selected accessible child |
634 |
|
*/ |
635 |
|
public Accessible getAccessibleSelection(int n) |
636 |
|
{ |
637 |
|
return new AccessibleJListChild(JList.this, getSelectedIndices()[n]); |
638 |
|
} |
639 |
|
|
640 |
|
/** |
641 |
|
* Returns <code>true</code> if the n-th child is selected, |
642 |
|
* <code>false</code> otherwise. |
643 |
|
* |
644 |
|
* @param n the index of the child of which the selected state is queried |
645 |
|
* |
646 |
|
* @return <code>true</code> if the n-th child is selected, |
647 |
|
* <code>false</code> otherwise |
648 |
|
*/ |
649 |
|
public boolean isAccessibleChildSelected(int n) |
650 |
|
{ |
651 |
|
return isSelectedIndex(n); |
652 |
|
} |
653 |
|
|
654 |
|
/** |
655 |
|
* Adds the accessible item with the specified index to the selected items. |
656 |
|
* If multiple selections are supported, the item is added to the selection, |
657 |
|
* otherwise the item replaces the current selection. |
658 |
|
* |
659 |
|
* @param i the index of the item to add to the selection |
660 |
|
*/ |
661 |
|
public void addAccessibleSelection(int i) |
662 |
|
{ |
663 |
|
addSelectionInterval(i, i); |
664 |
|
} |
665 |
|
|
666 |
|
/** |
667 |
|
* Removes the accessible item with the specified index to the selection. |
668 |
|
* |
669 |
|
* @param i the index of the item to be removed from the selection |
670 |
|
*/ |
671 |
|
public void removeAccessibleSelection(int i) |
672 |
|
{ |
673 |
|
removeSelectionInterval(i, i); |
674 |
|
} |
675 |
|
|
676 |
|
/** |
677 |
|
* Remove all selection items from the selection. |
678 |
|
*/ |
679 |
|
public void clearAccessibleSelection() |
680 |
|
{ |
681 |
|
clearSelection(); |
682 |
|
} |
683 |
|
|
684 |
|
/** |
685 |
|
* Selects all items if multiple selections are supported. |
686 |
|
* Otherwise do nothing. |
687 |
|
*/ |
688 |
|
public void selectAllAccessibleSelection() |
689 |
|
{ |
690 |
|
addSelectionInterval(0, getModel().getSize()); |
691 |
|
} |
692 |
|
|
693 |
|
/** |
694 |
|
* Receices notification when the list selection is changed. This method |
695 |
|
* fires two property change events, the first with |
696 |
|
* {@link AccessibleContext#ACCESSIBLE_VISIBLE_DATA_PROPERTY} and the second |
697 |
|
* with {@link AccessibleContext#ACCESSIBLE_SELECTION_PROPERTY}. |
698 |
|
* |
699 |
|
* @param event the list selection event |
700 |
|
*/ |
701 |
|
public void valueChanged(ListSelectionEvent event) |
702 |
|
{ |
703 |
|
firePropertyChange(ACCESSIBLE_VISIBLE_DATA_PROPERTY, Boolean.FALSE, |
704 |
|
Boolean.TRUE); |
705 |
|
firePropertyChange(ACCESSIBLE_SELECTION_PROPERTY, Boolean.FALSE, |
706 |
|
Boolean.TRUE); |
707 |
|
} |
708 |
|
|
709 |
|
/** |
710 |
|
* Receives notification when items have changed in the |
711 |
|
* <code>JList</code>. This method fires a property change event with |
712 |
|
* {@link AccessibleContext#ACCESSIBLE_VISIBLE_DATA_PROPERTY}. |
713 |
|
* |
714 |
|
* @param event the list data event |
715 |
|
*/ |
716 |
|
public void contentsChanged(ListDataEvent event) |
717 |
|
{ |
718 |
|
firePropertyChange(ACCESSIBLE_VISIBLE_DATA_PROPERTY, Boolean.FALSE, |
719 |
|
Boolean.TRUE); |
720 |
|
} |
721 |
|
|
722 |
|
/** |
723 |
|
* Receives notification when items are inserted into the |
724 |
|
* <code>JList</code>. This method fires a property change event with |
725 |
|
* {@link AccessibleContext#ACCESSIBLE_VISIBLE_DATA_PROPERTY}. |
726 |
|
* |
727 |
|
* @param event the list data event |
728 |
|
*/ |
729 |
|
public void intervalAdded(ListDataEvent event) |
730 |
|
{ |
731 |
|
firePropertyChange(ACCESSIBLE_VISIBLE_DATA_PROPERTY, Boolean.FALSE, |
732 |
|
Boolean.TRUE); |
733 |
|
} |
734 |
|
|
735 |
|
/** |
736 |
|
* Receives notification when items are removed from the |
737 |
|
* <code>JList</code>. This method fires a property change event with |
738 |
|
* {@link AccessibleContext#ACCESSIBLE_VISIBLE_DATA_PROPERTY}. |
739 |
|
* |
740 |
|
* @param event the list data event |
741 |
|
*/ |
742 |
|
public void intervalRemoved(ListDataEvent event) |
743 |
|
{ |
744 |
|
firePropertyChange(ACCESSIBLE_VISIBLE_DATA_PROPERTY, Boolean.FALSE, |
745 |
|
Boolean.TRUE); |
746 |
|
} |
747 |
|
|
748 |
|
|
749 |
|
/** |
750 |
|
* Receives notification about changes of the <code>JList</code>'s |
751 |
|
* properties. This is used to re-register this object as listener to |
752 |
|
* the data model and selection model when the data model or selection model |
753 |
|
* changes. |
754 |
|
* |
755 |
|
* @param e the property change event |
756 |
|
*/ |
757 |
|
public void propertyChange(PropertyChangeEvent e) |
758 |
|
{ |
759 |
|
String propertyName = e.getPropertyName(); |
760 |
|
if (propertyName.equals("model")) |
761 |
|
{ |
762 |
|
ListModel oldModel = (ListModel) e.getOldValue(); |
763 |
|
oldModel.removeListDataListener(this); |
764 |
|
ListModel newModel = (ListModel) e.getNewValue(); |
765 |
|
newModel.addListDataListener(this); |
766 |
|
} |
767 |
|
else if (propertyName.equals("selectionModel")) |
768 |
|
{ |
769 |
|
ListSelectionModel oldModel = (ListSelectionModel) e.getOldValue(); |
770 |
|
oldModel.removeListSelectionListener(this); |
771 |
|
ListSelectionModel newModel = (ListSelectionModel) e.getNewValue(); |
772 |
|
oldModel.addListSelectionListener(this); |
773 |
|
} |
774 |
|
} |
775 |
|
|
776 |
|
/** |
777 |
|
* Return the state set of the <code>JList</code>. |
778 |
|
* |
779 |
|
* @return the state set of the <code>JList</code> |
780 |
|
*/ |
781 |
|
public AccessibleStateSet getAccessibleStateSet() |
782 |
|
{ |
783 |
|
// TODO: Figure out if there is possibly more state that must be |
784 |
|
// handled here. |
785 |
|
AccessibleStateSet s = super.getAccessibleStateSet(); |
786 |
|
if (getSelectionMode() != ListSelectionModel.SINGLE_SELECTION) |
787 |
|
s.add(AccessibleState.MULTISELECTABLE); |
788 |
|
return s; |
789 |
|
} |
790 |
|
|
791 |
|
/** |
792 |
|
* Returns the accessible role for <code>JList</code>, |
793 |
|
* {@link AccessibleRole#LIST}. |
794 |
|
* |
795 |
|
* @return the accessible role for <code>JList</code> |
796 |
|
*/ |
797 |
|
public AccessibleRole getAccessibleRole() |
798 |
|
{ |
799 |
|
return AccessibleRole.LIST; |
800 |
|
} |
801 |
|
|
802 |
|
/** |
803 |
|
* Returns the accessible child at the visual location <code>p</code> |
804 |
|
* (relative to the upper left corner of the <code>JList</code>). If there |
805 |
|
* is no child at that location, this returns <code>null</code>. |
806 |
|
* |
807 |
|
* @param p the screen location for which to return the accessible child |
808 |
|
* |
809 |
|
* @return the accessible child at the specified location, or |
810 |
|
* <code>null</code> if there is no child at that location |
811 |
|
*/ |
812 |
|
public Accessible getAccessibleAt(Point p) |
813 |
|
{ |
814 |
|
int childIndex = locationToIndex(p); |
815 |
|
return getAccessibleChild(childIndex); |
816 |
|
} |
817 |
|
|
818 |
|
/** |
819 |
|
* Returns the number of accessible children in the <code>JList</code>. |
820 |
|
* |
821 |
|
* @return the number of accessible children in the <code>JList</code> |
822 |
|
*/ |
823 |
|
public int getAccessibleChildrenCount() |
824 |
|
{ |
825 |
|
return getModel().getSize(); |
826 |
|
} |
827 |
|
|
828 |
|
/** |
829 |
|
* Returns the n-th accessible child of this <code>JList</code>. This will |
830 |
|
* be an instance of {@link AccessibleJListChild}. If there is no child |
831 |
|
* at that index, <code>null</code> is returned. |
832 |
|
* |
833 |
|
* @param n the index of the child to return |
834 |
|
* |
835 |
|
* @return the n-th accessible child of this <code>JList</code> |
836 |
|
*/ |
837 |
|
public Accessible getAccessibleChild(int n) |
838 |
|
{ |
839 |
|
if (getModel().getSize() <= n) |
840 |
|
return null; |
841 |
|
return new AccessibleJListChild(JList.this, n); |
842 |
|
} |
843 |
|
} |
844 |
|
|
845 |
private static final long serialVersionUID = 4406629526391098046L; |
private static final long serialVersionUID = 4406629526391098046L; |
846 |
|
|
847 |
/** |
/** |