copyannotationca.java

编辑视频文件

/*
 * File:     CopyAnnotationCA.java
 * Project:  MPI Linguistic Application
 * Date:     02 May 2007
 *
 * Copyright (C) 2001-2007  Max Planck Institute for Psycholinguistics
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package mpi.eudico.client.annotator.commands;

import mpi.eudico.client.annotator.ActiveAnnotationListener;
import mpi.eudico.client.annotator.ElanLocale;
import mpi.eudico.client.annotator.ViewerManager2;

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.Action;
import javax.swing.KeyStroke;


/**
 * A CommandAction to copy an annotation (i.e. a transferable AnnotationDataRecord) to the System's
 * Clipboard.
 */
public class CopyAnnotationCA extends CommandAction
    implements ActiveAnnotationListener {
    /**
     * Creates a new CopyAnnotationCA instance
     * @param viewerManager the ViewerManager
     */
    public CopyAnnotationCA(ViewerManager2 viewerManager) {
        super(viewerManager, ELANCommandFactory.COPY_ANNOTATION);
        putValue(Action.ACCELERATOR_KEY,
            KeyStroke.getKeyStroke(KeyEvent.VK_C,
                Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
        putValue(SHORT_DESCRIPTION,
            ElanLocale.getString(ELANCommandFactory.COPY_ANNOTATION +
                "ToolTip"));
        viewerManager.connectListener(this);
    }

    /**
     * Constructor to be called by subclasses, otherwise the wrong "commandId" will be set.
     * @param viewerManager the viewer manager
     * @param name the name of the command
     */
    CopyAnnotationCA(ViewerManager2 viewerManager, String name) {
        super(viewerManager, name);
    }

    /**
     * @see mpi.eudico.client.annotator.commands.CommandAction#newCommand()
     */
    protected void newCommand() {
        command = ELANCommandFactory.createCommand(vm.getTranscription(),
                ELANCommandFactory.COPY_ANNOTATION);
    }

    /**
     * The active annotation.
     *
     * @return an Object array size = 1
     */
    protected Object[] getArguments() {
        return new Object[] { vm.getActiveAnnotation().getAnnotation() };
    }

    /**
     * Don't create a command when there is no active annotation or if there is no clipbaord access.
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent event) {
        if (vm.getActiveAnnotation().getAnnotation() == null) {
            return;
        }

        if (!canAccessSystemClipboard()) {
            return;
        }

        super.actionPerformed(event);
    }

    /**
     * Performs a check on the accessibility of the system clipboard.
     *
     * @return true if the system clipboard is accessible, false otherwise
     */
    protected boolean canAccessSystemClipboard() {
        if (System.getSecurityManager() != null) {
            try {
                System.getSecurityManager().checkSystemClipboardAccess();

                return true;
            } catch (SecurityException se) {
                se.printStackTrace();

                return false;
            }
        }

        return true;
    }

    /**
     * @see mpi.eudico.client.annotator.ActiveAnnotationListener#updateActiveAnnotation()
     */
    public void updateActiveAnnotation() {
        if (vm.getActiveAnnotation().getAnnotation() != null) {
            setEnabled(true);
        } else {
            setEnabled(false);
        }
    }
}