--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/eswt_qt/org.eclipse.swt/Eclipse_SWT_PI/qt/org/eclipse/swt/internal/qt/CommandPresentationStrategy.java	Mon May 03 12:27:20 2010 +0300
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Nokia Corporation - initial implementation
+ *******************************************************************************/
+package org.eclipse.swt.internal.qt;
+
+import org.eclipse.ercp.swt.mobile.Command;
+import org.eclipse.swt.internal.qt.CommandArranger.CommandCollection;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
+/**
+ * This is the interface that all the {@link Command} presentation is delegated to.
+ * The implementations of this abstract class are expected to provide the
+ * presentation logic for their respective uses.
+ *
+ * The implementations of this class can be specific to a platform, toolkit or a
+ * combination of factors. Refer to {@link CommandArranger} on the loading mechanism
+ * of the {@link CommandPresentationStrategy} implementation.
+ *
+ * Since the implementations can be specific to a toolkit implementations are expected to
+ * handle the following.
+ * <ul>
+ * 	<li>Ordering of the {@link Command}s</li>
+ * 	<li>Positioning {@link Command}s to correct soft keys or menus so that they are accessible</li>
+ * </ul>
+ *
+ */
+public abstract class CommandPresentationStrategy {
+
+
+    /**
+     * CommandArranger delegates to this method when the currently active menu bar has changed.
+     * This does not include the cases where menu bar changes due to active window change which
+     * causes the menu bar to change on some platforms.
+     *
+     * @param newMenuBar
+     * @param commands
+     */
+    protected abstract void handleMenuBarChanged( int newMenuBar, CommandCollection commands );
+
+    /**
+     * CommandArranger delegates to this method when the currently focused control has changed.
+     * On some platforms a focus change can also be accompanied with a menu bar change. Such menu bar
+     * changes due to active window change must be handled here.
+     *
+     * @param focused-currently focused control
+     * @param oldCommands-the commands of the previous focus context
+     * @param commands-of the current focus context
+     *
+     * @see CommandArranger#focusedControlChanged()
+     */
+    protected abstract void handleFocusChange( Control focused, CommandCollection oldCommands, CommandCollection commands );
+
+    /**
+     * CommandArranger delegates to this method, an added or removed Command is in the current
+     * focus context and needs to be presented. In other words, this method does not get notification of
+     * all added or removed Commands but only those that has some impact on the representation.
+     *
+     * @param added Command
+     * @param removed Command
+     * @param commands including the added/removed command
+     *
+     * @see CommandArranger#commandAdded(Command)
+     * @see CommandArranger#commandRemoved(Command)
+     */
+    protected abstract void handleCommandListChange(Command added, Command removed, CommandCollection commands );
+
+    /**
+     * CommandArranger reports the default command changes to this method. However implementations
+     * should take into account default commands on focus changes.
+     *
+     * @param defaultCommand
+     */
+    protected abstract void handleDefaultCommandChange( Command defaultCommand );
+    /**
+     * This method is called when the CommandArranger is disposed as part of
+     * the disposal of the {@link Display} or
+     * if it is replaced by a new one on the CommandArranger.
+     *
+     * On Display dispose, the method is called after all the Shells are disposed but before the Display is cleaned.
+     *
+     * @see CommandArranger#setPresentationStrategy(CommandPresentationStrategy)
+     */
+    protected abstract void dispose();
+
+}