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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/swing/plaf/basic/BasicMenuUI.java
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+/* BasicMenuUI.java
+ Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.plaf.basic;
+
+import gnu.classpath.NotImplementedException;
+
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.MouseEvent;
+import java.beans.PropertyChangeListener;
+
+import javax.swing.AbstractAction;
+import javax.swing.JComponent;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JPopupMenu;
+import javax.swing.LookAndFeel;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.Timer;
+import javax.swing.UIDefaults;
+import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.MenuDragMouseEvent;
+import javax.swing.event.MenuDragMouseListener;
+import javax.swing.event.MenuEvent;
+import javax.swing.event.MenuKeyEvent;
+import javax.swing.event.MenuKeyListener;
+import javax.swing.event.MenuListener;
+import javax.swing.event.MouseInputListener;
+import javax.swing.plaf.ComponentUI;
+
+/**
+ * UI Delegate for JMenu
+ */
+public class BasicMenuUI extends BasicMenuItemUI
+{
+ /**
+ * Selects a menu. This is used to delay menu selection.
+ */
+ class SelectMenuAction
+ extends AbstractAction
+ {
+ /**
+ * Performs the action.
+ */
+ public void actionPerformed(ActionEvent event)
+ {
+ JMenu menu = (JMenu) menuItem;
+ MenuSelectionManager defaultManager =
+ MenuSelectionManager.defaultManager();
+ MenuElement path[] = defaultManager.getSelectedPath();
+ if(path.length > 0 && path[path.length - 1] == menu)
+ {
+ MenuElement newPath[] = new MenuElement[path.length + 1];
+ System.arraycopy(path, 0, newPath, 0, path.length);
+ newPath[path.length] = menu.getPopupMenu();
+ defaultManager.setSelectedPath(newPath);
+ }
+ }
+
+ }
+
+ protected ChangeListener changeListener;
+
+ /* MenuListener listens to MenuEvents fired by JMenu */
+ protected MenuListener menuListener;
+
+ /* PropertyChangeListner that listens to propertyChangeEvents occuring in JMenu*/
+ protected PropertyChangeListener propertyChangeListener;
+
+ /**
+ * Creates a new BasicMenuUI object.
+ */
+ public BasicMenuUI()
+ {
+ mouseInputListener = createMouseInputListener((JMenu) menuItem);
+ menuListener = createMenuListener((JMenu) menuItem);
+ propertyChangeListener = createPropertyChangeListener((JMenu) menuItem);
+ }
+
+ /**
+ * This method creates a new ChangeListener.
+ *
+ * @return A new ChangeListener.
+ */
+ protected ChangeListener createChangeListener(JComponent c)
+ {
+ return new ChangeHandler((JMenu) c, this);
+ }
+
+ /**
+ * This method creates new MenuDragMouseListener to listen to mouse dragged events
+ * occuring in the Menu
+ *
+ * @param c the menu to listen to
+ *
+ * @return The MenuDrageMouseListener
+ */
+ protected MenuDragMouseListener createMenuDragMouseListener(JComponent c)
+ {
+ return new MenuDragMouseHandler();
+ }
+
+ /**
+ * This method creates new MenuDragKeyListener to listen to key events
+ *
+ * @param c the menu to listen to
+ *
+ * @return The MenuKeyListener
+ */
+ protected MenuKeyListener createMenuKeyListener(JComponent c)
+ {
+ return new MenuKeyHandler();
+ }
+
+ /**
+ * This method creates new MenuListener to listen to menu events
+ * occuring in the Menu
+ *
+ * @param c the menu to listen to
+ *
+ * @return The MenuListener
+ */
+ protected MenuListener createMenuListener(JComponent c)
+ {
+ return new MenuHandler();
+ }
+
+ /**
+ * This method creates new MouseInputListener to listen to mouse input events
+ * occuring in the Menu
+ *
+ * @param c the menu to listen to
+ *
+ * @return The MouseInputListener
+ */
+ protected MouseInputListener createMouseInputListener(JComponent c)
+ {
+ return new MouseInputHandler();
+ }
+
+ /**
+ * This method creates newPropertyChangeListener to listen to property changes
+ * occuring in the Menu
+ *
+ * @param c the menu to listen to
+ *
+ * @return The PropertyChangeListener
+ */
+ protected PropertyChangeListener createPropertyChangeListener(JComponent c)
+ {
+ return new PropertyChangeHandler();
+ }
+
+ /**
+ * This method creates a new BasicMenuUI.
+ *
+ * @param c The JComponent to create a UI for.
+ *
+ * @return A new BasicMenuUI.
+ */
+ public static ComponentUI createUI(JComponent c)
+ {
+ return new BasicMenuUI();
+ }
+
+ /**
+ * Get the component's maximum size.
+ *
+ * @param c The JComponent for which to get maximum size
+ *
+ * @return The maximum size of the component
+ */
+ public Dimension getMaximumSize(JComponent c)
+ {
+ return c.getPreferredSize();
+ }
+
+ /**
+ * Returns the prefix for entries in the {@link UIDefaults} table.
+ *
+ * @return "Menu"
+ */
+ protected String getPropertyPrefix()
+ {
+ return "Menu";
+ }
+
+ /**
+ * Initializes any default properties that this UI has from the defaults for
+ * the Basic look and feel.
+ */
+ protected void installDefaults()
+ {
+
+ LookAndFeel.installBorder(menuItem, "Menu.border");
+ LookAndFeel.installColorsAndFont(menuItem, "Menu.background",
+ "Menu.foreground", "Menu.font");
+ menuItem.setMargin(UIManager.getInsets("Menu.margin"));
+ acceleratorFont = UIManager.getFont("Menu.acceleratorFont");
+ acceleratorForeground = UIManager.getColor("Menu.acceleratorForeground");
+ acceleratorSelectionForeground = UIManager.getColor("Menu.acceleratorSelectionForeground");
+ selectionBackground = UIManager.getColor("Menu.selectionBackground");
+ selectionForeground = UIManager.getColor("Menu.selectionForeground");
+ arrowIcon = UIManager.getIcon("Menu.arrowIcon");
+ oldBorderPainted = UIManager.getBoolean("Menu.borderPainted");
+ ((JMenu) menuItem).setDelay(200);
+ }
+
+ /**
+ * Installs any keyboard actions. The list of keys that need to be bound are
+ * listed in Basic look and feel's defaults.
+ *
+ */
+ protected void installKeyboardActions()
+ {
+ super.installKeyboardActions();
+ }
+
+ /**
+ * Creates and registers all the listeners for this UI delegate.
+ */
+ protected void installListeners()
+ {
+ super.installListeners();
+ ((JMenu) menuItem).addMenuListener(menuListener);
+ }
+
+ protected void setupPostTimer(JMenu menu)
+ {
+ Timer timer = new Timer(menu.getDelay(), new SelectMenuAction());
+ timer.setRepeats(false);
+ timer.start();
+ }
+
+ /**
+ * This method uninstalls the defaults and sets any objects created during
+ * install to null
+ */
+ protected void uninstallDefaults()
+ {
+ menuItem.setBackground(null);
+ menuItem.setBorder(null);
+ menuItem.setFont(null);
+ menuItem.setForeground(null);
+ menuItem.setMargin(null);
+ acceleratorFont = null;
+ acceleratorForeground = null;
+ acceleratorSelectionForeground = null;
+ selectionBackground = null;
+ selectionForeground = null;
+ arrowIcon = null;
+ }
+
+ /**
+ * Uninstalls any keyboard actions. The list of keys used are listed in
+ * Basic look and feel's defaults.
+ */
+ protected void uninstallKeyboardActions()
+ {
+ super.installKeyboardActions();
+ }
+
+ /**
+ * Unregisters all the listeners that this UI delegate was using. In
+ * addition, it will also null any listeners that it was using.
+ */
+ protected void uninstallListeners()
+ {
+ super.uninstallListeners();
+ ((JMenu) menuItem).removeMenuListener(menuListener);
+ }
+
+ /**
+ * This class is used by menus to handle mouse events occuring in the
+ * menu.
+ */
+ protected class MouseInputHandler implements MouseInputListener
+ {
+ public void mouseClicked(MouseEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ public void mouseDragged(MouseEvent e)
+ {
+ MenuSelectionManager manager = MenuSelectionManager.defaultManager();
+ manager.processMouseEvent(e);
+ }
+
+ private boolean popupVisible()
+ {
+ JMenuBar mb = (JMenuBar) ((JMenu) menuItem).getParent();
+ // check if mb.isSelected because if no menus are selected
+ // we don't have to look through the list for popup menus
+ if (!mb.isSelected())
+ return false;
+ for (int i = 0; i < mb.getMenuCount(); i++)
+ {
+ JMenu m = mb.getMenu(i);
+ if (m != null && m.isPopupMenuVisible())
+ return true;
+ }
+ return false;
+ }
+
+ public void mouseEntered(MouseEvent e)
+ {
+ JMenu menu = (JMenu) menuItem;
+ if (menu.isEnabled())
+ {
+ MenuSelectionManager manager =
+ MenuSelectionManager.defaultManager();
+ MenuElement[] selectedPath = manager.getSelectedPath();
+ if (! menu.isTopLevelMenu())
+ {
+ // Open the menu immediately or delayed, depending on the
+ // delay value.
+ if(! (selectedPath.length > 0
+ && selectedPath[selectedPath.length - 1] == menu.getPopupMenu()))
+ {
+ if(menu.getDelay() == 0)
+ {
+ MenuElement[] path = getPath();
+ MenuElement[] newPath = new MenuElement[path.length + 1];
+ System.arraycopy(path, 0, newPath, 0, path.length);
+ newPath[path.length] = menu.getPopupMenu();
+ manager.setSelectedPath(newPath);
+ }
+ else
+ {
+ manager.setSelectedPath(getPath());
+ setupPostTimer(menu);
+ }
+ }
+ }
+ else
+ {
+ if(selectedPath.length > 0
+ && selectedPath[0] == menu.getParent())
+ {
+ MenuElement[] newPath = new MenuElement[3];
+ newPath[0] = (MenuElement) menu.getParent();
+ newPath[1] = menu;
+ newPath[2] = menu.getPopupMenu();
+ manager.setSelectedPath(newPath);
+ }
+ }
+ }
+ }
+
+ public void mouseExited(MouseEvent e)
+ {
+ MenuSelectionManager manager = MenuSelectionManager.defaultManager();
+ manager.processMouseEvent(e);
+ }
+
+ public void mouseMoved(MouseEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ public void mousePressed(MouseEvent e)
+ {
+ MenuSelectionManager manager = MenuSelectionManager.defaultManager();
+ JMenu menu = (JMenu) menuItem;
+ if (menu.isEnabled())
+ {
+ // Open up the menu immediately if it's a toplevel menu.
+ // But not yet the popup, which might be opened delayed, see below.
+ if (menu.isTopLevelMenu())
+ {
+ if (menu.isSelected())
+ manager.clearSelectedPath();
+ else
+ {
+ Container cnt = menu.getParent();
+ if (cnt != null && cnt instanceof JMenuBar)
+ {
+ MenuElement[] me = new MenuElement[2];
+ me[0] = (MenuElement) cnt;
+ me[1] = menu;
+ manager.setSelectedPath(me);
+ }
+ }
+ }
+
+ // Open the menu's popup. Either do that immediately if delay == 0,
+ // or delayed when delay > 0.
+ MenuElement[] selectedPath = manager.getSelectedPath();
+ if (selectedPath.length > 0
+ && selectedPath[selectedPath.length - 1] != menu.getPopupMenu())
+ {
+ if(menu.isTopLevelMenu() || menu.getDelay() == 0)
+ {
+ MenuElement[] newPath =
+ new MenuElement[selectedPath.length + 1];
+ System.arraycopy(selectedPath, 0, newPath, 0,
+ selectedPath.length);
+ newPath[selectedPath.length] = menu.getPopupMenu();
+ manager.setSelectedPath(newPath);
+ }
+ else
+ {
+ setupPostTimer(menu);
+ }
+ }
+
+ }
+ }
+
+ public void mouseReleased(MouseEvent e)
+ {
+ MenuSelectionManager manager = MenuSelectionManager.defaultManager();
+ manager.processMouseEvent(e);
+ }
+ }
+
+ /**
+ * This class handles MenuEvents fired by the JMenu
+ */
+ private class MenuHandler implements MenuListener
+ {
+ /**
+ * This method is called when menu is cancelled. The menu is cancelled
+ * when its popup menu is closed without selection. It clears selected index
+ * in the selectionModel of the menu parent.
+ *
+ * @param e The MenuEvent.
+ */
+ public void menuCanceled(MenuEvent e)
+ {
+ menuDeselected(e);
+ }
+
+ /**
+ * This method is called when menu is deselected. It clears selected index
+ * in the selectionModel of the menu parent.
+ *
+ * @param e The MenuEvent.
+ */
+ public void menuDeselected(MenuEvent e)
+ {
+ JMenu menu = (JMenu) menuItem;
+ if (menu.getParent() != null)
+ {
+ if (menu.isTopLevelMenu())
+ ((JMenuBar) menu.getParent()).getSelectionModel().clearSelection();
+ else
+ ((JPopupMenu) menu.getParent()).getSelectionModel().clearSelection();
+ }
+ }
+
+ /**
+ * This method is called when menu is selected. It sets selected index
+ * in the selectionModel of the menu parent.
+ *
+ * @param e The MenuEvent.
+ */
+ public void menuSelected(MenuEvent e)
+ {
+ JMenu menu = (JMenu) menuItem;
+ if (menu.isTopLevelMenu())
+ ((JMenuBar) menu.getParent()).setSelected(menu);
+ else
+ ((JPopupMenu) menu.getParent()).setSelected(menu);
+ }
+ }
+
+ /**
+ * Obsolete as of JDK1.4.
+ */
+ public class ChangeHandler implements ChangeListener
+ {
+ /**
+ * Not used.
+ */
+ public boolean isSelected;
+
+ /**
+ * Not used.
+ */
+ public JMenu menu;
+
+ /**
+ * Not used.
+ */
+ public BasicMenuUI ui;
+
+ /**
+ * Not used.
+ */
+ public Component wasFocused;
+
+ /**
+ * Not used.
+ */
+ public ChangeHandler(JMenu m, BasicMenuUI ui)
+ {
+ menu = m;
+ this.ui = ui;
+ }
+
+ /**
+ * Not used.
+ */
+ public void stateChanged(ChangeEvent e)
+ {
+ // Not used.
+ }
+ }
+
+ /**
+ * This class handles mouse dragged events occuring in the menu.
+ */
+ private class MenuDragMouseHandler implements MenuDragMouseListener
+ {
+ /**
+ * This method is invoked when mouse is dragged over the menu item.
+ *
+ * @param e The MenuDragMouseEvent
+ */
+ public void menuDragMouseDragged(MenuDragMouseEvent e)
+ {
+ if (menuItem.isEnabled())
+ {
+ MenuSelectionManager manager = e.getMenuSelectionManager();
+ MenuElement path[] = e.getPath();
+
+ Point p = e.getPoint();
+ if(p.x >= 0 && p.x < menuItem.getWidth()
+ && p.y >= 0 && p.y < menuItem.getHeight())
+ {
+ JMenu menu = (JMenu) menuItem;
+ MenuElement[] selectedPath = manager.getSelectedPath();
+ if(! (selectedPath.length > 0
+ && selectedPath[selectedPath.length-1]
+ == menu.getPopupMenu()))
+ {
+ if(menu.isTopLevelMenu() || menu.getDelay() == 0
+ || e.getID() == MouseEvent.MOUSE_DRAGGED)
+ {
+ MenuElement[] newPath = new MenuElement[path.length + 1];
+ System.arraycopy(path, 0, newPath, 0, path.length);
+ newPath[path.length] = menu.getPopupMenu();
+ manager.setSelectedPath(newPath);
+ }
+ else
+ {
+ manager.setSelectedPath(path);
+ setupPostTimer(menu);
+ }
+ }
+ }
+ else if (e.getID() == MouseEvent.MOUSE_RELEASED)
+ {
+ Component comp = manager.componentForPoint(e.getComponent(),
+ e.getPoint());
+ if (comp == null)
+ manager.clearSelectedPath();
+ }
+ }
+ }
+
+ /**
+ * This method is invoked when mouse enters the menu item while it is
+ * being dragged.
+ *
+ * @param e The MenuDragMouseEvent
+ */
+ public void menuDragMouseEntered(MenuDragMouseEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * This method is invoked when mouse exits the menu item while
+ * it is being dragged
+ *
+ * @param e The MenuDragMouseEvent
+ */
+ public void menuDragMouseExited(MenuDragMouseEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * This method is invoked when mouse was dragged and released
+ * inside the menu item.
+ *
+ * @param e The MenuDragMouseEvent
+ */
+ public void menuDragMouseReleased(MenuDragMouseEvent e)
+ {
+ // Nothing to do here.
+ }
+ }
+
+ /**
+ * This class handles key events occuring when menu item is visible on the
+ * screen.
+ */
+ private class MenuKeyHandler implements MenuKeyListener
+ {
+ /**
+ * This method is invoked when key has been pressed
+ *
+ * @param e A {@link MenuKeyEvent}.
+ */
+ public void menuKeyPressed(MenuKeyEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * This method is invoked when key has been pressed
+ *
+ * @param e A {@link MenuKeyEvent}.
+ */
+ public void menuKeyReleased(MenuKeyEvent e)
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * This method is invoked when key has been typed
+ * It handles the mnemonic key for the menu item.
+ *
+ * @param e A {@link MenuKeyEvent}.
+ */
+ public void menuKeyTyped(MenuKeyEvent e)
+ throws NotImplementedException
+ {
+ // TODO: What should be done here, if anything?
+ }
+ }
+}