timescalebasedviewer.java

编辑视频文件

/*
 * File:     TimeScaleBasedViewer.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.viewer;

import mpi.eudico.client.annotator.TimeScale;
import mpi.eudico.client.annotator.TimeScaleUser;


/**
 * A viewer that has a time scale ruler in its view
 */
public abstract class TimeScaleBasedViewer extends AbstractViewer
    implements TimeScaleUser {
    private TimeScale timeScale;

    /** An array of zoomlevels. */
    public final int[] ZOOMLEVELS = new int[] {
            10, 25, 50, 75, 100, 150, 200, 500, 1000
        };

    /**
     * Sets the TimeScale object for this viewer
     *
     * @param timeScale DOCUMENT ME!
     */
    public void setGlobalTimeScale(TimeScale timeScale) {
        if (timeScale == null) {
            return;
        }

        this.timeScale = timeScale;
    }

    /**
     * Returns the first visible time of the global scale in milli seconds
     *
     * @return DOCUMENT ME!
     */
    public long getGlobalTimeScaleIntervalBeginTime() {
        if (timeScale == null) {
            return 0;
        }

        return timeScale.getBeginTime();
    }

    /**
     * Sets the first visible time of the global scale in milli seconds
     *
     * @param time DOCUMENT ME!
     */
    public void setGlobalTimeScaleIntervalBeginTime(long time) {
        if (timeScale == null) {
            return;
        }

        timeScale.setBeginTime(time);
    }

    /**
     * Returns the last visible time of the global scale in milli seconds
     *
     * @return DOCUMENT ME!
     */
    public long getGlobalTimeScaleIntervalEndTime() {
        if (timeScale == null) {
            return 0;
        }

        return timeScale.getEndTime();
    }

    /**
     * Sets the last visible time of the global scale in milli seconds
     *
     * @param time DOCUMENT ME!
     */
    public void setGlobalTimeScaleIntervalEndTime(long time) {
        if (timeScale == null) {
            return;
        }

        timeScale.setEndTime(time);
    }

    /**
     * Returns the duration of the visible interval of the global scale in
     * milli seconds
     *
     * @return DOCUMENT ME!
     */
    public long getGlobalTimeScaleIntervalDuration() {
        if (timeScale == null) {
            return 0;
        }

        return timeScale.getIntervalDuration();
    }

    /**
     * Returns the step size of the global scale in milli seconds
     *
     * @return DOCUMENT ME!
     */
    public int getGlobalTimeScaleMsPerPixel() {
        if (timeScale == null) {
            return 10;
        }

        return timeScale.getMsPerPixel();
    }

    /**
     * Sets the step size of the global scale in milli seconds
     *
     * @param step DOCUMENT ME!
     */
    public void setGlobalTimeScaleMsPerPixel(int step) {
        if (timeScale == null) {
            return;
        }

        timeScale.setMsPerPixel(step);
    }

    /**
     * Is called to notify the viewer that time scale related data is changed
     * the viewer can use the get methods to ask for the new values
     */
    public abstract void updateTimeScale();

    /**
     * Returns the milli seconds per pixel for the time scale
     */

    //	public abstract int getMsPerPixel();

    /**
     * Returns the first visible time for the time scale
     */

    //	public abstract long getIntervalBeginTime();

    /**
     * Returns the last visible time for the time scale
     */

    //	public abstract long getIntervalEndTime();
}