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jeremybenn |
/* BasicButtonListener.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 gnu.classpath.SystemProperties;
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import java.awt.event.ActionEvent;
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import java.awt.event.FocusEvent;
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import java.awt.event.FocusListener;
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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.MouseMotionListener;
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import java.awt.font.FontRenderContext;
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import java.awt.font.TextLayout;
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import java.awt.geom.AffineTransform;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.swing.AbstractAction;
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import javax.swing.AbstractButton;
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import javax.swing.Action;
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import javax.swing.ActionMap;
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import javax.swing.ButtonModel;
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import javax.swing.InputMap;
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import javax.swing.JComponent;
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import javax.swing.SwingUtilities;
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import javax.swing.UIManager;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import javax.swing.plaf.ActionMapUIResource;
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import javax.swing.plaf.ButtonUI;
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public class BasicButtonListener
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implements MouseListener, MouseMotionListener, FocusListener, ChangeListener,
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PropertyChangeListener
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{
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/**
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* Implements the keyboard action for Swing buttons.
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*/
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private class ButtonAction
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extends AbstractAction
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{
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/**
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* The key for pressed action.
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*/
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static final String PRESSED = "pressed";
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/**
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* The key for released action.
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*/
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static final String RELEASED = "released";
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/**
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* Performs the action.
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*/
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public void actionPerformed(ActionEvent event)
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{
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Object cmd = getValue("__command__");
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AbstractButton b = (AbstractButton) event.getSource();
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ButtonModel m = b.getModel();
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if (PRESSED.equals(cmd))
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{
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m.setArmed(true);
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m.setPressed(true);
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if (! b.isFocusOwner())
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b.requestFocus();
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}
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else if (RELEASED.equals(cmd))
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{
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m.setPressed(false);
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m.setArmed(false);
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}
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}
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/**
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* Indicates if this action is enabled.
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*
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* @param source the source of the action
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*
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* @return <code>true</code> when enabled, <code>false</code> otherwise
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*/
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public boolean isEnabled(Object source)
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{
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boolean enabled = true;
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if (source instanceof AbstractButton)
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{
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AbstractButton b = (AbstractButton) source;
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enabled = b.isEnabled();
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}
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return enabled;
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}
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}
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public BasicButtonListener(AbstractButton b)
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{
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// Do nothing here.
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}
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public void propertyChange(PropertyChangeEvent e)
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{
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// Store the TextLayout for this in a client property for speed-up
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// painting of the label.
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String property = e.getPropertyName();
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AbstractButton b = (AbstractButton) e.getSource();
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if ((property.equals(AbstractButton.TEXT_CHANGED_PROPERTY)
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|| property.equals("font"))
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&& SystemProperties.getProperty("gnu.javax.swing.noGraphics2D")
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== null)
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{
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String text = b.getText();
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if (text == null)
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text = "";
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FontRenderContext frc = new FontRenderContext(new AffineTransform(),
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false, false);
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TextLayout layout = new TextLayout(text, b.getFont(), frc);
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b.putClientProperty(BasicGraphicsUtils.CACHED_TEXT_LAYOUT, layout);
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// Update HTML renderer.
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BasicHTML.updateRenderer(b, b.getText());
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}
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else if (property.equals(AbstractButton.CONTENT_AREA_FILLED_CHANGED_PROPERTY))
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{
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checkOpacity(b);
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}
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}
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/**
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* Checks the <code>contentAreaFilled</code> property and updates the
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* opaque property of the button.
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*
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* @param b the button to check
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*/
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protected void checkOpacity(AbstractButton b)
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{
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b.setOpaque(b.isContentAreaFilled());
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}
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public void focusGained(FocusEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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if (button.isFocusPainted())
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button.repaint();
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}
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}
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public void focusLost(FocusEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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if (button.isFocusPainted())
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button.repaint();
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}
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}
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public void installKeyboardActions(JComponent c)
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{
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ButtonUI ui = ((AbstractButton) c).getUI();
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if (ui instanceof BasicButtonUI)
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{
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// Install InputMap.
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BasicButtonUI basicUI = (BasicButtonUI) ui;
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String prefix = basicUI.getPropertyPrefix();
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InputMap focusInputMap =
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(InputMap) UIManager.get(prefix + "focusInputMap");
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SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_FOCUSED,
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focusInputMap);
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ActionMap am = (ActionMap) UIManager.get(prefix + "actionMap");
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if (am == null)
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{
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am = createDefaultActionMap();
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UIManager.put(prefix + "actionMap", am);
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}
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SwingUtilities.replaceUIActionMap(c, am);
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}
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c.getActionMap().put("pressed",
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new AbstractAction()
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{
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public void actionPerformed(ActionEvent e)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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// It is important that these transitions happen in this order.
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model.setArmed(true);
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model.setPressed(true);
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}
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});
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c.getActionMap().put("released",
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new AbstractAction()
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{
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public void actionPerformed(ActionEvent e)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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// It is important that these transitions happen in this order.
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model.setPressed(false);
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model.setArmed(false);
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}
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});
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}
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/**
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* Creates and returns the default action map for Swing buttons.
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*
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* @return the default action map for Swing buttons
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*/
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private ActionMap createDefaultActionMap()
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{
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Action action = new ButtonAction();
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ActionMapUIResource am = new ActionMapUIResource();
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am.put(ButtonAction.PRESSED, action);
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am.put(ButtonAction.RELEASED, action);
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return am;
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}
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public void uninstallKeyboardActions(JComponent c)
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{
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SwingUtilities.replaceUIActionMap(c, null);
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SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_FOCUSED, null);
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}
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public void stateChanged(ChangeEvent e)
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{
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// Need to repaint when the button state changes.
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((AbstractButton) e.getSource()).repaint();
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}
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public void mouseMoved(MouseEvent e)
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{
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// Nothing to do here.
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}
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public void mouseDragged(MouseEvent e)
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{
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// Nothing to do here.
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}
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public void mouseClicked(MouseEvent e)
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{
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// Nothing to do here.
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}
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/**
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* Accept a mouse press event and arm the button.
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*
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* @param e The mouse press event to accept
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*/
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public void mousePressed(MouseEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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if (SwingUtilities.isLeftMouseButton(e))
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{
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// It is important that these transitions happen in this order.
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model.setArmed(true);
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model.setPressed(true);
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if (! button.isFocusOwner() && button.isRequestFocusEnabled())
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button.requestFocus();
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}
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}
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}
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/**
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* Accept a mouse release event and set the button's
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* "pressed" property to <code>true</code>, if the model
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* is armed. If the model is not armed, ignore the event.
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*
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* @param e The mouse release event to accept
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*/
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public void mouseReleased(MouseEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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if (e.getButton() == MouseEvent.BUTTON1)
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{
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// It is important that these transitions happen in this order.
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model.setPressed(false);
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model.setArmed(false);
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}
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}
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}
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/**
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* Accept a mouse enter event and set the button's "rollover" property to
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* <code>true</code>, if the button's "rolloverEnabled" property is
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* <code>true</code>. If the button is currently armed and the mouse
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* button is not held down, this enter event will also disarm the model.
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*
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* @param e The mouse enter event to accept
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*/
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public void mouseEntered(MouseEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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if (button.isRolloverEnabled()
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&& ! SwingUtilities.isLeftMouseButton(e))
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model.setRollover(true);
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if (model.isPressed())
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model.setArmed(true);
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}
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}
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/**
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* Accept a mouse exit event and set the button's model's "rollover"
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* property to <code>false</code>, if it's "rolloverEnabled" property is
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* <code>true</code>. Also disarm the button.
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*
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* @param e The mouse exit event to accept
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*/
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public void mouseExited(MouseEvent e)
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{
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if (e.getSource() instanceof AbstractButton)
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{
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AbstractButton button = (AbstractButton) e.getSource();
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ButtonModel model = button.getModel();
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if (button.isRolloverEnabled())
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model.setRollover(false);
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model.setArmed(false);
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}
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}
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}
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