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jlechner |
/* BasicComboPopup.java --
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing.plaf.basic;
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import java.awt.Color;
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import java.awt.Component;
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import java.awt.Dimension;
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import java.awt.Point;
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import java.awt.Rectangle;
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import java.awt.event.ItemEvent;
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import java.awt.event.ItemListener;
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import java.awt.event.KeyAdapter;
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import java.awt.event.KeyEvent;
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import java.awt.event.KeyListener;
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import java.awt.event.MouseAdapter;
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import java.awt.event.MouseEvent;
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import java.awt.event.MouseListener;
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import java.awt.event.MouseMotionAdapter;
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import java.awt.event.MouseMotionListener;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.swing.BorderFactory;
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import javax.swing.ComboBoxModel;
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import javax.swing.JComboBox;
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import javax.swing.JLabel;
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import javax.swing.JList;
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import javax.swing.JPopupMenu;
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import javax.swing.JScrollBar;
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import javax.swing.JScrollPane;
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import javax.swing.ListCellRenderer;
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import javax.swing.ListSelectionModel;
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import javax.swing.SwingConstants;
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import javax.swing.SwingUtilities;
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import javax.swing.Timer;
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import javax.swing.event.ListDataEvent;
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import javax.swing.event.ListDataListener;
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import javax.swing.event.ListSelectionEvent;
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import javax.swing.event.ListSelectionListener;
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import javax.swing.event.PopupMenuEvent;
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import javax.swing.event.PopupMenuListener;
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/**
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* UI Delegate for ComboPopup
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*
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* @author Olga Rodimina
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*/
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public class BasicComboPopup extends JPopupMenu implements ComboPopup
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{
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/* Timer for autoscrolling */
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protected Timer autoscrollTimer;
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/** ComboBox associated with this popup */
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protected JComboBox comboBox;
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/** FIXME: Need to document */
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protected boolean hasEntered;
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/**
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* Indicates whether the scroll bar located in popup menu with comboBox's
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* list of items is currently autoscrolling. This happens when mouse event
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* originated in the combo box and is dragged outside of its bounds
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*/
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protected boolean isAutoScrolling;
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/** ItemListener listening to the selection changes in the combo box */
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protected ItemListener itemListener;
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/** This listener is not used */
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protected KeyListener keyListener;
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/** JList which is used to display item is the combo box */
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protected JList list;
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/** This listener is not used */
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protected ListDataListener listDataListener;
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/**
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* MouseListener listening to mouse events occuring in the combo box's
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* list.
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*/
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protected MouseListener listMouseListener;
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/**
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* MouseMotionListener listening to mouse motion events occuring in the
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* combo box's list
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*/
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protected MouseMotionListener listMouseMotionListener;
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/** This listener is not used */
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protected ListSelectionListener listSelectionListener;
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/** MouseListener listening to mouse events occuring in the combo box */
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protected MouseListener mouseListener;
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/**
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* MouseMotionListener listening to mouse motion events occuring in the
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* combo box
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*/
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protected MouseMotionListener mouseMotionListener;
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/**
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* PropertyChangeListener listening to changes occuring in the bound
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* properties of the combo box
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*/
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protected PropertyChangeListener propertyChangeListener;
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/** direction for scrolling down list of combo box's items */
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protected static final int SCROLL_DOWN = 1;
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/** direction for scrolling up list of combo box's items */
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protected static final int SCROLL_UP = 0;
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/** Indicates auto scrolling direction */
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protected int scrollDirection;
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/** JScrollPane that contains list portion of the combo box */
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protected JScrollPane scroller;
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/** This field is not used */
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protected boolean valueIsAdjusting;
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/**
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* Creates a new BasicComboPopup object.
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*
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* @param comboBox the combo box with which this popup should be associated
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*/
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public BasicComboPopup(JComboBox comboBox)
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{
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this.comboBox = comboBox;
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installComboBoxListeners();
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configurePopup();
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setLightWeightPopupEnabled(comboBox.isLightWeightPopupEnabled());
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}
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/**
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* This method displays drow down list of combo box items on the screen.
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*/
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public void show()
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{
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Rectangle cbBounds = comboBox.getBounds();
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// popup should have same width as the comboBox and should be hight anough
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// to display number of rows equal to 'maximumRowCount' property
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int popupHeight = getPopupHeightForRowCount(comboBox.getMaximumRowCount());
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scroller.setPreferredSize(new Dimension(cbBounds.width, popupHeight));
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pack();
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// Highlight selected item in the combo box's drop down list
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if (comboBox.getSelectedIndex() != -1)
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list.setSelectedIndex(comboBox.getSelectedIndex());
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//scroll scrollbar s.t. selected item is visible
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JScrollBar scrollbar = scroller.getVerticalScrollBar();
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int selectedIndex = comboBox.getSelectedIndex();
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if (selectedIndex > comboBox.getMaximumRowCount())
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scrollbar.setValue(getPopupHeightForRowCount(selectedIndex));
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// location specified is relative to comboBox
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super.show(comboBox, 0, cbBounds.height);
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}
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/**
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* This method hides drop down list of items
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*/
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public void hide()
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{
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super.setVisible(false);
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}
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/**
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* Return list cointaining JComboBox's items
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*
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* @return list cointaining JComboBox's items
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*/
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public JList getList()
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{
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return list;
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}
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/**
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* Returns MouseListener that is listening to mouse events occuring in the
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* combo box.
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*
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* @return MouseListener
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*/
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public MouseListener getMouseListener()
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{
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return mouseListener;
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}
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/**
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* Returns MouseMotionListener that is listening to mouse motion events
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* occuring in the combo box.
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*
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* @return MouseMotionListener
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*/
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public MouseMotionListener getMouseMotionListener()
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{
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return mouseMotionListener;
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}
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/**
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* Returns KeyListener listening to key events occuring in the combo box.
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* This method returns null because KeyHandler is not longer used.
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*
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* @return KeyListener
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*/
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public KeyListener getKeyListener()
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{
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return keyListener;
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}
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/**
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* This method uninstalls the UI for the given JComponent.
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*/
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public void uninstallingUI()
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{
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uninstallComboBoxModelListeners(comboBox.getModel());
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uninstallListeners();
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uninstallKeyboardActions();
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}
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/**
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* This method uninstalls listeners that were listening to changes occuring
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* in the comb box's data model
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*
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* @param model data model for the combo box from which to uninstall
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* listeners
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*/
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protected void uninstallComboBoxModelListeners(ComboBoxModel model)
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{
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model.removeListDataListener(listDataListener);
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}
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/**
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* This method uninstalls keyboard actions installed by the UI.
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*/
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protected void uninstallKeyboardActions()
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{
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// FIXME: Need to implement
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}
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/**
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* This method fires PopupMenuEvent indicating that combo box's popup list
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* of items will become visible
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*/
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protected void firePopupMenuWillBecomeVisible()
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{
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PopupMenuListener[] ll = comboBox.getPopupMenuListeners();
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for (int i = 0; i < ll.length; i++)
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ll[i].popupMenuWillBecomeVisible(new PopupMenuEvent(comboBox));
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}
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/**
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* This method fires PopupMenuEvent indicating that combo box's popup list
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* of items will become invisible.
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*/
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protected void firePopupMenuWillBecomeInvisible()
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{
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PopupMenuListener[] ll = comboBox.getPopupMenuListeners();
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for (int i = 0; i < ll.length; i++)
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ll[i].popupMenuWillBecomeInvisible(new PopupMenuEvent(comboBox));
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}
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/**
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* This method fires PopupMenuEvent indicating that combo box's popup list
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* of items was closed without selection.
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*/
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protected void firePopupMenuCanceled()
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{
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PopupMenuListener[] ll = comboBox.getPopupMenuListeners();
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for (int i = 0; i < ll.length; i++)
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ll[i].popupMenuCanceled(new PopupMenuEvent(comboBox));
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}
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/**
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* Creates MouseListener to listen to mouse events occuring in the combo
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* box. Note that this listener doesn't listen to mouse events occuring in
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* the popup portion of the combo box, it only listens to main combo box
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* part.
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*
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* @return new MouseMotionListener that listens to mouse events occuring in
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* the combo box
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*/
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protected MouseListener createMouseListener()
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{
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return new InvocationMouseHandler();
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}
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/**
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* Create Mouse listener that listens to mouse dragging events occuring in
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* the combo box. This listener is responsible for changing the selection
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* in the combo box list to the component over which mouse is being
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* currently dragged
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*
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* @return new MouseMotionListener that listens to mouse dragging events
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* occuring in the combo box
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*/
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protected MouseMotionListener createMouseMotionListener()
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{
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return new InvocationMouseMotionHandler();
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}
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/**
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* KeyListener created in this method is not used anymore.
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*
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* @return KeyListener that does nothing
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*/
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protected KeyListener createKeyListener()
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{
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return new InvocationKeyHandler();
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}
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/**
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* ListSelectionListener created in this method is not used anymore
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*
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* @return ListSelectionListener that does nothing
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*/
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protected ListSelectionListener createListSelectionListener()
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{
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return new ListSelectionHandler();
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}
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/**
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* Creates ListDataListener. This method returns null, because
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* ListDataHandler class is obsolete and is no longer used.
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*
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* @return null
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*/
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protected ListDataListener createListDataListener()
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{
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return null;
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}
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/**
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* This method creates ListMouseListener to listen to mouse events occuring
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* in the combo box's item list.
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*
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* @return MouseListener to listen to mouse events occuring in the combo
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* box's items list.
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*/
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protected MouseListener createListMouseListener()
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{
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return new ListMouseHandler();
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}
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/**
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* Creates ListMouseMotionlistener to listen to mouse motion events occuring
|
391 |
|
|
* in the combo box's list. This listener is responsible for highlighting
|
392 |
|
|
* items in the list when mouse is moved over them.
|
393 |
|
|
*
|
394 |
|
|
* @return MouseMotionListener that handles mouse motion events occuring in
|
395 |
|
|
* the list of the combo box.
|
396 |
|
|
*/
|
397 |
|
|
protected MouseMotionListener createListMouseMotionListener()
|
398 |
|
|
{
|
399 |
|
|
return new ListMouseMotionHandler();
|
400 |
|
|
}
|
401 |
|
|
|
402 |
|
|
/**
|
403 |
|
|
* Creates PropertyChangeListener to handle changes in the JComboBox's bound
|
404 |
|
|
* properties.
|
405 |
|
|
*
|
406 |
|
|
* @return PropertyChangeListener to handle changes in the JComboBox's bound
|
407 |
|
|
* properties.
|
408 |
|
|
*/
|
409 |
|
|
protected PropertyChangeListener createPropertyChangeListener()
|
410 |
|
|
{
|
411 |
|
|
return new PropertyChangeHandler();
|
412 |
|
|
}
|
413 |
|
|
|
414 |
|
|
/**
|
415 |
|
|
* Creates new ItemListener that will listen to ItemEvents occuring in the
|
416 |
|
|
* combo box.
|
417 |
|
|
*
|
418 |
|
|
* @return ItemListener to listen to ItemEvents occuring in the combo box.
|
419 |
|
|
*/
|
420 |
|
|
protected ItemListener createItemListener()
|
421 |
|
|
{
|
422 |
|
|
return new ItemHandler();
|
423 |
|
|
}
|
424 |
|
|
|
425 |
|
|
/**
|
426 |
|
|
* Creates JList that will be used to display items in the combo box.
|
427 |
|
|
*
|
428 |
|
|
* @return JList that will be used to display items in the combo box.
|
429 |
|
|
*/
|
430 |
|
|
protected JList createList()
|
431 |
|
|
{
|
432 |
|
|
JList l = new JList(comboBox.getModel());
|
433 |
|
|
l.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
|
434 |
|
|
return l;
|
435 |
|
|
}
|
436 |
|
|
|
437 |
|
|
/**
|
438 |
|
|
* This method configures the list of comboBox's items by setting default
|
439 |
|
|
* properties and installing listeners.
|
440 |
|
|
*/
|
441 |
|
|
protected void configureList()
|
442 |
|
|
{
|
443 |
|
|
list.setModel(comboBox.getModel());
|
444 |
|
|
list.setVisibleRowCount(comboBox.getMaximumRowCount());
|
445 |
|
|
installListListeners();
|
446 |
|
|
}
|
447 |
|
|
|
448 |
|
|
/**
|
449 |
|
|
* This method installs list listeners.
|
450 |
|
|
*/
|
451 |
|
|
protected void installListListeners()
|
452 |
|
|
{
|
453 |
|
|
// mouse listener listening to mouse events occuring in the
|
454 |
|
|
// combo box's list of items.
|
455 |
|
|
listMouseListener = createListMouseListener();
|
456 |
|
|
list.addMouseListener(listMouseListener);
|
457 |
|
|
|
458 |
|
|
// mouse listener listening to mouse motion events occuring in the
|
459 |
|
|
// combo box's list of items
|
460 |
|
|
listMouseMotionListener = createListMouseMotionListener();
|
461 |
|
|
list.addMouseMotionListener(listMouseMotionListener);
|
462 |
|
|
|
463 |
|
|
listSelectionListener = createListSelectionListener();
|
464 |
|
|
list.addListSelectionListener(listSelectionListener);
|
465 |
|
|
}
|
466 |
|
|
|
467 |
|
|
/**
|
468 |
|
|
* This method creates scroll pane that will contain the list of comboBox's
|
469 |
|
|
* items inside of it.
|
470 |
|
|
*
|
471 |
|
|
* @return JScrollPane
|
472 |
|
|
*/
|
473 |
|
|
protected JScrollPane createScroller()
|
474 |
|
|
{
|
475 |
|
|
return new JScrollPane();
|
476 |
|
|
}
|
477 |
|
|
|
478 |
|
|
/**
|
479 |
|
|
* This method configures scroll pane to contain list of comboBox's items
|
480 |
|
|
*/
|
481 |
|
|
protected void configureScroller()
|
482 |
|
|
{
|
483 |
|
|
scroller.setBorder(null);
|
484 |
|
|
scroller.getViewport().setView(list);
|
485 |
|
|
scroller.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
|
486 |
|
|
}
|
487 |
|
|
|
488 |
|
|
/**
|
489 |
|
|
* This method configures popup menu that will be used to display Scrollpane
|
490 |
|
|
* with list of items inside of it.
|
491 |
|
|
*/
|
492 |
|
|
protected void configurePopup()
|
493 |
|
|
{
|
494 |
|
|
setBorder(BorderFactory.createLineBorder(Color.BLACK));
|
495 |
|
|
// initialize list that will be used to display combo box's items
|
496 |
|
|
this.list = createList();
|
497 |
|
|
((JLabel) list.getCellRenderer()).setHorizontalAlignment(SwingConstants.LEFT);
|
498 |
|
|
configureList();
|
499 |
|
|
|
500 |
|
|
// initialize scroller. Add list to the scroller.
|
501 |
|
|
scroller = createScroller();
|
502 |
|
|
configureScroller();
|
503 |
|
|
|
504 |
|
|
// add scroller with list inside of it to JPopupMenu
|
505 |
|
|
super.add(scroller);
|
506 |
|
|
}
|
507 |
|
|
|
508 |
|
|
/*
|
509 |
|
|
* This method installs listeners that will listen to changes occuring
|
510 |
|
|
* in the combo box.
|
511 |
|
|
*/
|
512 |
|
|
protected void installComboBoxListeners()
|
513 |
|
|
{
|
514 |
|
|
// mouse listener that listens to mouse event in combo box
|
515 |
|
|
mouseListener = createMouseListener();
|
516 |
|
|
comboBox.addMouseListener(mouseListener);
|
517 |
|
|
|
518 |
|
|
// mouse listener that listens to mouse dragging events in the combo box
|
519 |
|
|
mouseMotionListener = createMouseMotionListener();
|
520 |
|
|
comboBox.addMouseMotionListener(mouseMotionListener);
|
521 |
|
|
|
522 |
|
|
// item listener listenening to selection events in the combo box
|
523 |
|
|
itemListener = createItemListener();
|
524 |
|
|
comboBox.addItemListener(itemListener);
|
525 |
|
|
|
526 |
|
|
propertyChangeListener = createPropertyChangeListener();
|
527 |
|
|
comboBox.addPropertyChangeListener(propertyChangeListener);
|
528 |
|
|
}
|
529 |
|
|
|
530 |
|
|
/**
|
531 |
|
|
* This method installs listeners that will listen to changes occuring in
|
532 |
|
|
* the comb box's data model
|
533 |
|
|
*
|
534 |
|
|
* @param model data model for the combo box for which to install listeners
|
535 |
|
|
*/
|
536 |
|
|
protected void installComboBoxModelListeners(ComboBoxModel model)
|
537 |
|
|
{
|
538 |
|
|
// list data listener to listen for ListDataEvents in combo box.
|
539 |
|
|
// This listener is now obsolete and nothing is done here
|
540 |
|
|
listDataListener = createListDataListener();
|
541 |
|
|
comboBox.getModel().addListDataListener(listDataListener);
|
542 |
|
|
}
|
543 |
|
|
|
544 |
|
|
/**
|
545 |
|
|
* DOCUMENT ME!
|
546 |
|
|
*/
|
547 |
|
|
protected void installKeyboardActions()
|
548 |
|
|
{
|
549 |
|
|
// FIXME: Need to implement
|
550 |
|
|
}
|
551 |
|
|
|
552 |
|
|
/**
|
553 |
|
|
* This method always returns false to indicate that items in the combo box
|
554 |
|
|
* list are not focus traversable.
|
555 |
|
|
*
|
556 |
|
|
* @return false
|
557 |
|
|
*/
|
558 |
|
|
public boolean isFocusTraversable()
|
559 |
|
|
{
|
560 |
|
|
return false;
|
561 |
|
|
}
|
562 |
|
|
|
563 |
|
|
/**
|
564 |
|
|
* This method start scrolling combo box's list of items either up or down
|
565 |
|
|
* depending on the specified 'direction'
|
566 |
|
|
*
|
567 |
|
|
* @param direction of the scrolling.
|
568 |
|
|
*/
|
569 |
|
|
protected void startAutoScrolling(int direction)
|
570 |
|
|
{
|
571 |
|
|
// FIXME: add timer
|
572 |
|
|
isAutoScrolling = true;
|
573 |
|
|
|
574 |
|
|
if (direction == SCROLL_UP)
|
575 |
|
|
autoScrollUp();
|
576 |
|
|
else
|
577 |
|
|
autoScrollDown();
|
578 |
|
|
}
|
579 |
|
|
|
580 |
|
|
/**
|
581 |
|
|
* This method stops scrolling the combo box's list of items
|
582 |
|
|
*/
|
583 |
|
|
protected void stopAutoScrolling()
|
584 |
|
|
{
|
585 |
|
|
// FIXME: add timer
|
586 |
|
|
isAutoScrolling = false;
|
587 |
|
|
}
|
588 |
|
|
|
589 |
|
|
/**
|
590 |
|
|
* This method scrolls up list of combo box's items up and highlights that
|
591 |
|
|
* just became visible.
|
592 |
|
|
*/
|
593 |
|
|
protected void autoScrollUp()
|
594 |
|
|
{
|
595 |
|
|
// scroll up the scroll bar to make the item above visible
|
596 |
|
|
JScrollBar scrollbar = scroller.getVerticalScrollBar();
|
597 |
|
|
int scrollToNext = list.getScrollableUnitIncrement(super.getBounds(),
|
598 |
|
|
SwingConstants.VERTICAL,
|
599 |
|
|
SCROLL_UP);
|
600 |
|
|
|
601 |
|
|
scrollbar.setValue(scrollbar.getValue() - scrollToNext);
|
602 |
|
|
|
603 |
|
|
// If we haven't reached the begging of the combo box's list of items,
|
604 |
|
|
// then highlight next element above currently highlighted element
|
605 |
|
|
if (list.getSelectedIndex() != 0)
|
606 |
|
|
list.setSelectedIndex(list.getSelectedIndex() - 1);
|
607 |
|
|
}
|
608 |
|
|
|
609 |
|
|
/**
|
610 |
|
|
* This method scrolls down list of combo box's and highlights item in the
|
611 |
|
|
* list that just became visible.
|
612 |
|
|
*/
|
613 |
|
|
protected void autoScrollDown()
|
614 |
|
|
{
|
615 |
|
|
// scroll scrollbar down to make next item visible
|
616 |
|
|
JScrollBar scrollbar = scroller.getVerticalScrollBar();
|
617 |
|
|
int scrollToNext = list.getScrollableUnitIncrement(super.getBounds(),
|
618 |
|
|
SwingConstants.VERTICAL,
|
619 |
|
|
SCROLL_DOWN);
|
620 |
|
|
scrollbar.setValue(scrollbar.getValue() + scrollToNext);
|
621 |
|
|
|
622 |
|
|
// If we haven't reached the end of the combo box's list of items
|
623 |
|
|
// then highlight next element below currently highlighted element
|
624 |
|
|
if (list.getSelectedIndex() + 1 != comboBox.getItemCount())
|
625 |
|
|
list.setSelectedIndex(list.getSelectedIndex() + 1);
|
626 |
|
|
}
|
627 |
|
|
|
628 |
|
|
/**
|
629 |
|
|
* This method helps to delegate focus to the right component in the
|
630 |
|
|
* JComboBox. If the comboBox is editable then focus is sent to
|
631 |
|
|
* ComboBoxEditor, otherwise it is delegated to JComboBox.
|
632 |
|
|
*
|
633 |
|
|
* @param e MouseEvent
|
634 |
|
|
*/
|
635 |
|
|
protected void delegateFocus(MouseEvent e)
|
636 |
|
|
{
|
637 |
|
|
// FIXME: Need to implement
|
638 |
|
|
}
|
639 |
|
|
|
640 |
|
|
/**
|
641 |
|
|
* This method displays combo box popup if the popup is not currently shown
|
642 |
|
|
* on the screen and hides it if it is currently visible
|
643 |
|
|
*/
|
644 |
|
|
protected void togglePopup()
|
645 |
|
|
{
|
646 |
|
|
if (BasicComboPopup.this.isVisible())
|
647 |
|
|
hide();
|
648 |
|
|
else
|
649 |
|
|
show();
|
650 |
|
|
}
|
651 |
|
|
|
652 |
|
|
/**
|
653 |
|
|
* DOCUMENT ME!
|
654 |
|
|
*
|
655 |
|
|
* @param e DOCUMENT ME!
|
656 |
|
|
*
|
657 |
|
|
* @return DOCUMENT ME!
|
658 |
|
|
*/
|
659 |
|
|
protected MouseEvent convertMouseEvent(MouseEvent e)
|
660 |
|
|
{
|
661 |
|
|
return null;
|
662 |
|
|
}
|
663 |
|
|
|
664 |
|
|
/**
|
665 |
|
|
* Returns required height of the popup such that number of items visible in
|
666 |
|
|
* it are equal to the maximum row count. By default
|
667 |
|
|
* comboBox.maximumRowCount=8
|
668 |
|
|
*
|
669 |
|
|
* @param maxRowCount number of maximum visible rows in the combo box's
|
670 |
|
|
* popup list of items
|
671 |
|
|
*
|
672 |
|
|
* @return height of the popup required to fit number of items equal to
|
673 |
|
|
* JComboBox.maximumRowCount.
|
674 |
|
|
*/
|
675 |
|
|
protected int getPopupHeightForRowCount(int maxRowCount)
|
676 |
|
|
{
|
677 |
|
|
int totalHeight = 0;
|
678 |
|
|
ListCellRenderer rend = list.getCellRenderer();
|
679 |
|
|
|
680 |
|
|
if (comboBox.getItemCount() < maxRowCount)
|
681 |
|
|
maxRowCount = comboBox.getItemCount();
|
682 |
|
|
|
683 |
|
|
for (int i = 0; i < maxRowCount; i++)
|
684 |
|
|
{
|
685 |
|
|
Component comp = rend.getListCellRendererComponent(list,
|
686 |
|
|
comboBox.getModel()
|
687 |
|
|
.getElementAt(i),
|
688 |
|
|
-1, false, false);
|
689 |
|
|
Dimension dim = comp.getPreferredSize();
|
690 |
|
|
totalHeight += dim.height;
|
691 |
|
|
}
|
692 |
|
|
|
693 |
|
|
return totalHeight;
|
694 |
|
|
}
|
695 |
|
|
|
696 |
|
|
/**
|
697 |
|
|
* DOCUMENT ME!
|
698 |
|
|
*
|
699 |
|
|
* @param px DOCUMENT ME!
|
700 |
|
|
* @param py DOCUMENT ME!
|
701 |
|
|
* @param pw DOCUMENT ME!
|
702 |
|
|
* @param ph DOCUMENT ME!
|
703 |
|
|
*
|
704 |
|
|
* @return DOCUMENT ME!
|
705 |
|
|
*/
|
706 |
|
|
protected Rectangle computePopupBounds(int px, int py, int pw, int ph)
|
707 |
|
|
{
|
708 |
|
|
return new Rectangle(px, py, pw, ph);
|
709 |
|
|
}
|
710 |
|
|
|
711 |
|
|
/**
|
712 |
|
|
* This method changes the selection in the list to the item over which the
|
713 |
|
|
* mouse is currently located.
|
714 |
|
|
*
|
715 |
|
|
* @param anEvent MouseEvent
|
716 |
|
|
* @param shouldScroll DOCUMENT ME!
|
717 |
|
|
*/
|
718 |
|
|
protected void updateListBoxSelectionForEvent(MouseEvent anEvent,
|
719 |
|
|
boolean shouldScroll)
|
720 |
|
|
{
|
721 |
|
|
// TODO: We need to handle the shouldScroll parameter somehow.
|
722 |
|
|
int index = list.locationToIndex(anEvent.getPoint());
|
723 |
|
|
// Check for valid index.
|
724 |
|
|
if (index >= 0)
|
725 |
|
|
list.setSelectedIndex(index);
|
726 |
|
|
}
|
727 |
|
|
|
728 |
|
|
/**
|
729 |
|
|
* InvocationMouseHandler is a listener that listens to mouse events
|
730 |
|
|
* occuring in the combo box. Note that this listener doesn't listen to
|
731 |
|
|
* mouse events occuring in the popup portion of the combo box, it only
|
732 |
|
|
* listens to main combo box part(area that displays selected item). This
|
733 |
|
|
* listener is responsible for showing and hiding popup portion of the
|
734 |
|
|
* combo box.
|
735 |
|
|
*/
|
736 |
|
|
protected class InvocationMouseHandler extends MouseAdapter
|
737 |
|
|
{
|
738 |
|
|
/**
|
739 |
|
|
* Creates a new InvocationMouseHandler object.
|
740 |
|
|
*/
|
741 |
|
|
protected InvocationMouseHandler()
|
742 |
|
|
{
|
743 |
|
|
// Nothing to do here.
|
744 |
|
|
}
|
745 |
|
|
|
746 |
|
|
/**
|
747 |
|
|
* This method is invoked whenever mouse is being pressed over the main
|
748 |
|
|
* part of the combo box. This method will show popup if the popup is
|
749 |
|
|
* not shown on the screen right now, and it will hide popup otherwise.
|
750 |
|
|
*
|
751 |
|
|
* @param e MouseEvent that should be handled
|
752 |
|
|
*/
|
753 |
|
|
public void mousePressed(MouseEvent e)
|
754 |
|
|
{
|
755 |
|
|
if (comboBox.isEnabled())
|
756 |
|
|
togglePopup();
|
757 |
|
|
}
|
758 |
|
|
|
759 |
|
|
/**
|
760 |
|
|
* This method is invoked whenever mouse event was originated in the combo
|
761 |
|
|
* box and released either in the combBox list of items or in the combo
|
762 |
|
|
* box itself.
|
763 |
|
|
*
|
764 |
|
|
* @param e MouseEvent that should be handled
|
765 |
|
|
*/
|
766 |
|
|
public void mouseReleased(MouseEvent e)
|
767 |
|
|
{
|
768 |
|
|
// Get component over which mouse was released
|
769 |
|
|
Component src = (Component) e.getSource();
|
770 |
|
|
int x = e.getX();
|
771 |
|
|
int y = e.getY();
|
772 |
|
|
Component releasedComponent = SwingUtilities.getDeepestComponentAt(src,
|
773 |
|
|
x, y);
|
774 |
|
|
|
775 |
|
|
// if mouse was released inside the bounds of combo box then do nothing,
|
776 |
|
|
// Otherwise if mouse was released inside the list of combo box items
|
777 |
|
|
// then change selection and close popup
|
778 |
|
|
if (! (releasedComponent instanceof JComboBox))
|
779 |
|
|
{
|
780 |
|
|
// List model contains the item over which mouse is released,
|
781 |
|
|
// since it is updated every time the mouse is moved over a different
|
782 |
|
|
// item in the list. Now that the mouse is released we need to
|
783 |
|
|
// update model of the combo box as well.
|
784 |
|
|
comboBox.setSelectedIndex(list.getSelectedIndex());
|
785 |
|
|
|
786 |
|
|
if (isAutoScrolling)
|
787 |
|
|
stopAutoScrolling();
|
788 |
|
|
hide();
|
789 |
|
|
}
|
790 |
|
|
}
|
791 |
|
|
}
|
792 |
|
|
|
793 |
|
|
/**
|
794 |
|
|
* InvocationMouseMotionListener is a mouse listener that listens to mouse
|
795 |
|
|
* dragging events occuring in the combo box.
|
796 |
|
|
*/
|
797 |
|
|
protected class InvocationMouseMotionHandler extends MouseMotionAdapter
|
798 |
|
|
{
|
799 |
|
|
/**
|
800 |
|
|
* Creates a new InvocationMouseMotionHandler object.
|
801 |
|
|
*/
|
802 |
|
|
protected InvocationMouseMotionHandler()
|
803 |
|
|
{
|
804 |
|
|
// Nothing to do here.
|
805 |
|
|
}
|
806 |
|
|
|
807 |
|
|
/**
|
808 |
|
|
* This method is responsible for highlighting item in the drop down list
|
809 |
|
|
* over which the mouse is currently being dragged.
|
810 |
|
|
*/
|
811 |
|
|
public void mouseDragged(MouseEvent e)
|
812 |
|
|
{
|
813 |
|
|
// convert point of the drag event relative to combo box list component
|
814 |
|
|
// figure out over which list cell the mouse is currently being dragged
|
815 |
|
|
// and highlight the cell. The list model is changed but the change has
|
816 |
|
|
// no effect on combo box's data model. The list model is changed so
|
817 |
|
|
// that the appropriate item would be highlighted in the combo box's
|
818 |
|
|
// list.
|
819 |
|
|
if (BasicComboPopup.this.isVisible())
|
820 |
|
|
{
|
821 |
|
|
int cbHeight = (int) comboBox.getPreferredSize().getHeight();
|
822 |
|
|
int popupHeight = BasicComboPopup.this.getSize().height;
|
823 |
|
|
|
824 |
|
|
// if mouse is dragged inside the the combo box's items list.
|
825 |
|
|
if (e.getY() > cbHeight && ! (e.getY() - cbHeight >= popupHeight))
|
826 |
|
|
{
|
827 |
|
|
int index = list.locationToIndex(new Point(e.getX(),
|
828 |
|
|
(int) (e.getY()
|
829 |
|
|
- cbHeight)));
|
830 |
|
|
|
831 |
|
|
int firstVisibleIndex = list.getFirstVisibleIndex();
|
832 |
|
|
|
833 |
|
|
// list.locationToIndex returns item's index that would
|
834 |
|
|
// be located at the specified point if the first item that
|
835 |
|
|
// is visible is item 0. However in the JComboBox it is not
|
836 |
|
|
// necessarily the case since list is contained in the
|
837 |
|
|
// JScrollPane so we need to adjust the index returned.
|
838 |
|
|
if (firstVisibleIndex != 0)
|
839 |
|
|
// FIXME: adjusted index here is off by one. I am adding one
|
840 |
|
|
// here to compensate for that. This should be
|
841 |
|
|
// index += firstVisibleIndex. Remove +1 once the bug is fixed.
|
842 |
|
|
index += firstVisibleIndex + 1;
|
843 |
|
|
|
844 |
|
|
list.setSelectedIndex(index);
|
845 |
|
|
}
|
846 |
|
|
else
|
847 |
|
|
{
|
848 |
|
|
// if mouse is being dragged at the bottom of combo box's list
|
849 |
|
|
// of items or at the very top then scroll the list in the
|
850 |
|
|
// desired direction.
|
851 |
|
|
boolean movingUP = e.getY() < cbHeight;
|
852 |
|
|
boolean movingDown = e.getY() > cbHeight;
|
853 |
|
|
|
854 |
|
|
if (movingUP)
|
855 |
|
|
{
|
856 |
|
|
scrollDirection = SCROLL_UP;
|
857 |
|
|
startAutoScrolling(SCROLL_UP);
|
858 |
|
|
}
|
859 |
|
|
else if (movingDown)
|
860 |
|
|
{
|
861 |
|
|
scrollDirection = SCROLL_DOWN;
|
862 |
|
|
startAutoScrolling(SCROLL_DOWN);
|
863 |
|
|
}
|
864 |
|
|
}
|
865 |
|
|
}
|
866 |
|
|
}
|
867 |
|
|
}
|
868 |
|
|
|
869 |
|
|
/**
|
870 |
|
|
* ItemHandler is an item listener that listens to selection events occuring
|
871 |
|
|
* in the combo box. FIXME: should specify here what it does when item is
|
872 |
|
|
* selected or deselected in the combo box list.
|
873 |
|
|
*/
|
874 |
|
|
protected class ItemHandler extends Object implements ItemListener
|
875 |
|
|
{
|
876 |
|
|
/**
|
877 |
|
|
* Creates a new ItemHandler object.
|
878 |
|
|
*/
|
879 |
|
|
protected ItemHandler()
|
880 |
|
|
{
|
881 |
|
|
// Nothing to do here.
|
882 |
|
|
}
|
883 |
|
|
|
884 |
|
|
/**
|
885 |
|
|
* This method responds to the selection events occuring in the combo box.
|
886 |
|
|
*
|
887 |
|
|
* @param e ItemEvent specifying the combo box's selection
|
888 |
|
|
*/
|
889 |
|
|
public void itemStateChanged(ItemEvent e)
|
890 |
|
|
{
|
891 |
|
|
// TODO: What should be done here?
|
892 |
|
|
}
|
893 |
|
|
}
|
894 |
|
|
|
895 |
|
|
/**
|
896 |
|
|
* ListMouseHandler is a listener that listens to mouse events occuring in
|
897 |
|
|
* the combo box's list of items. This class is responsible for hiding
|
898 |
|
|
* popup portion of the combo box if the mouse is released inside the combo
|
899 |
|
|
* box's list.
|
900 |
|
|
*/
|
901 |
|
|
protected class ListMouseHandler extends MouseAdapter
|
902 |
|
|
{
|
903 |
|
|
protected ListMouseHandler()
|
904 |
|
|
{
|
905 |
|
|
// Nothing to do here.
|
906 |
|
|
}
|
907 |
|
|
|
908 |
|
|
public void mousePressed(MouseEvent e)
|
909 |
|
|
{
|
910 |
|
|
// TODO: What should be do here?
|
911 |
|
|
}
|
912 |
|
|
|
913 |
|
|
public void mouseReleased(MouseEvent anEvent)
|
914 |
|
|
{
|
915 |
|
|
int index = list.locationToIndex(anEvent.getPoint());
|
916 |
|
|
// Check for valid index.
|
917 |
|
|
if (index >= 0)
|
918 |
|
|
comboBox.setSelectedIndex(index);
|
919 |
|
|
hide();
|
920 |
|
|
}
|
921 |
|
|
}
|
922 |
|
|
|
923 |
|
|
/**
|
924 |
|
|
* ListMouseMotionHandler listens to mouse motion events occuring in the
|
925 |
|
|
* combo box's list. This class is responsible for highlighting items in
|
926 |
|
|
* the list when mouse is moved over them
|
927 |
|
|
*/
|
928 |
|
|
protected class ListMouseMotionHandler extends MouseMotionAdapter
|
929 |
|
|
{
|
930 |
|
|
protected ListMouseMotionHandler()
|
931 |
|
|
{
|
932 |
|
|
// Nothing to do here.
|
933 |
|
|
}
|
934 |
|
|
|
935 |
|
|
public void mouseMoved(MouseEvent anEvent)
|
936 |
|
|
{
|
937 |
|
|
updateListBoxSelectionForEvent(anEvent, false);
|
938 |
|
|
}
|
939 |
|
|
}
|
940 |
|
|
|
941 |
|
|
/**
|
942 |
|
|
* This class listens to changes occuring in the bound properties of the
|
943 |
|
|
* combo box
|
944 |
|
|
*/
|
945 |
|
|
protected class PropertyChangeHandler extends Object
|
946 |
|
|
implements PropertyChangeListener
|
947 |
|
|
{
|
948 |
|
|
protected PropertyChangeHandler()
|
949 |
|
|
{
|
950 |
|
|
// Nothing to do here.
|
951 |
|
|
}
|
952 |
|
|
|
953 |
|
|
public void propertyChange(PropertyChangeEvent e)
|
954 |
|
|
{
|
955 |
|
|
if (e.getPropertyName().equals("renderer"))
|
956 |
|
|
{
|
957 |
|
|
list.setCellRenderer((ListCellRenderer) e.getNewValue());
|
958 |
|
|
revalidate();
|
959 |
|
|
repaint();
|
960 |
|
|
}
|
961 |
|
|
if (e.getPropertyName().equals("dataModel"))
|
962 |
|
|
{
|
963 |
|
|
list.setModel((ComboBoxModel) e.getNewValue());
|
964 |
|
|
revalidate();
|
965 |
|
|
repaint();
|
966 |
|
|
}
|
967 |
|
|
}
|
968 |
|
|
}
|
969 |
|
|
|
970 |
|
|
// ------ private helper methods --------------------
|
971 |
|
|
|
972 |
|
|
/**
|
973 |
|
|
* This method uninstalls listeners installed by the UI
|
974 |
|
|
*/
|
975 |
|
|
private void uninstallListeners()
|
976 |
|
|
{
|
977 |
|
|
uninstallListListeners();
|
978 |
|
|
uninstallComboBoxListeners();
|
979 |
|
|
uninstallComboBoxModelListeners(comboBox.getModel());
|
980 |
|
|
}
|
981 |
|
|
|
982 |
|
|
/**
|
983 |
|
|
* This method uninstalls Listeners registered with combo boxes list of
|
984 |
|
|
* items
|
985 |
|
|
*/
|
986 |
|
|
private void uninstallListListeners()
|
987 |
|
|
{
|
988 |
|
|
list.removeMouseListener(listMouseListener);
|
989 |
|
|
listMouseListener = null;
|
990 |
|
|
|
991 |
|
|
list.removeMouseMotionListener(listMouseMotionListener);
|
992 |
|
|
listMouseMotionListener = null;
|
993 |
|
|
}
|
994 |
|
|
|
995 |
|
|
/**
|
996 |
|
|
* This method uninstalls listeners listening to combo box associated with
|
997 |
|
|
* this popup menu
|
998 |
|
|
*/
|
999 |
|
|
private void uninstallComboBoxListeners()
|
1000 |
|
|
{
|
1001 |
|
|
comboBox.removeMouseListener(mouseListener);
|
1002 |
|
|
mouseListener = null;
|
1003 |
|
|
|
1004 |
|
|
comboBox.removeMouseMotionListener(mouseMotionListener);
|
1005 |
|
|
mouseMotionListener = null;
|
1006 |
|
|
|
1007 |
|
|
comboBox.removeItemListener(itemListener);
|
1008 |
|
|
itemListener = null;
|
1009 |
|
|
|
1010 |
|
|
comboBox.removePropertyChangeListener(propertyChangeListener);
|
1011 |
|
|
propertyChangeListener = null;
|
1012 |
|
|
}
|
1013 |
|
|
|
1014 |
|
|
// --------------------------------------------------------------------
|
1015 |
|
|
// The following classes are here only for backwards API compatibility
|
1016 |
|
|
// They aren't used.
|
1017 |
|
|
// --------------------------------------------------------------------
|
1018 |
|
|
|
1019 |
|
|
/**
|
1020 |
|
|
* This class is not used any more.
|
1021 |
|
|
*/
|
1022 |
|
|
public class ListDataHandler extends Object implements ListDataListener
|
1023 |
|
|
{
|
1024 |
|
|
public ListDataHandler()
|
1025 |
|
|
{
|
1026 |
|
|
// Nothing to do here.
|
1027 |
|
|
}
|
1028 |
|
|
|
1029 |
|
|
public void contentsChanged(ListDataEvent e)
|
1030 |
|
|
{
|
1031 |
|
|
// Nothing to do here.
|
1032 |
|
|
}
|
1033 |
|
|
|
1034 |
|
|
public void intervalAdded(ListDataEvent e)
|
1035 |
|
|
{
|
1036 |
|
|
// Nothing to do here.
|
1037 |
|
|
}
|
1038 |
|
|
|
1039 |
|
|
public void intervalRemoved(ListDataEvent e)
|
1040 |
|
|
{
|
1041 |
|
|
// Nothing to do here.
|
1042 |
|
|
}
|
1043 |
|
|
}
|
1044 |
|
|
|
1045 |
|
|
/**
|
1046 |
|
|
* This class is not used anymore
|
1047 |
|
|
*/
|
1048 |
|
|
protected class ListSelectionHandler extends Object
|
1049 |
|
|
implements ListSelectionListener
|
1050 |
|
|
{
|
1051 |
|
|
protected ListSelectionHandler()
|
1052 |
|
|
{
|
1053 |
|
|
// Nothing to do here.
|
1054 |
|
|
}
|
1055 |
|
|
|
1056 |
|
|
public void valueChanged(ListSelectionEvent e)
|
1057 |
|
|
{
|
1058 |
|
|
// Nothing to do here.
|
1059 |
|
|
}
|
1060 |
|
|
}
|
1061 |
|
|
|
1062 |
|
|
/**
|
1063 |
|
|
* This class is not used anymore
|
1064 |
|
|
*/
|
1065 |
|
|
public class InvocationKeyHandler extends KeyAdapter
|
1066 |
|
|
{
|
1067 |
|
|
public InvocationKeyHandler()
|
1068 |
|
|
{
|
1069 |
|
|
// Nothing to do here.
|
1070 |
|
|
}
|
1071 |
|
|
|
1072 |
|
|
public void keyReleased(KeyEvent e)
|
1073 |
|
|
{
|
1074 |
|
|
// Nothing to do here.
|
1075 |
|
|
}
|
1076 |
|
|
}
|
1077 |
|
|
}
|