sartrackextensiontool.java

来自「world wind java sdk 源码」· Java 代码 · 共 521 行 · 第 1/2 页

/*
Copyright (C) 2001, 2007 United States Government
as represented by the Administrator of the
National Aeronautics and Space Administration.
All Rights Reserved.
*/
package gov.nasa.worldwind.applications.sar;

import gov.nasa.worldwind.*;
import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.event.*;
import gov.nasa.worldwind.geom.*;
import gov.nasa.worldwind.globes.Globe;
import gov.nasa.worldwind.pick.PickedObject;
import gov.nasa.worldwind.render.*;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.Arrays;

/**
 * @author tag
 * @version $Id: SARTrackExtensionTool.java 9634 2009-03-24 17:03:21Z dcollins $
 */
public class SARTrackExtensionTool implements MouseListener, PositionListener, PropertyChangeListener
{
    private boolean armed;
    private WorldWindow wwd; // Can be null.
    private SARTrack track; // Can be null.
    protected SARSegmentPlane segmentPlane;
    protected Position potentialNextPosition;
    protected boolean waitingForNextPosition = true;
    protected boolean ignoreTrackChangeEvents = false;
    protected boolean canInsertTrailingPoint = true;
    protected SegmentPlaneAttributes.GeometryAttributes segmentEndGeomAttribs;
    protected SegmentPlaneAttributes.LabelAttributes segmentEndLabelAttribs;

    public SARTrackExtensionTool()
    {
        this.segmentPlane = new SARSegmentPlane();
        this.segmentPlane.addPropertyChangeListener(this);

        this.segmentEndGeomAttribs =
            this.segmentPlane.getAttributes().getGeometryAttributes(SegmentPlane.SEGMENT_END).copy();
        this.segmentEndLabelAttribs =
            this.segmentPlane.getAttributes().getLabelAttributes(SegmentPlane.SEGMENT_END).copy();
    }

    public boolean isArmed()
    {
        return this.armed;
    }

    public void setArmed(boolean armed)
    {
        boolean wasArmed = this.armed;
        this.armed = armed;
        this.segmentPlane.setArmed(armed);

        if (!wasArmed && this.armed)
        {
            this.start();
        }
        else if (wasArmed && !this.armed)
        {
            this.stop();
        }
    }

    public WorldWindow getWwd()
    {
        return this.wwd;
    }

    public void setWorldWindow(WorldWindow wwd)
    {
        if (this.wwd == wwd)
            return;

        if (this.wwd != null)
        {
            this.wwd.getInputHandler().removeMouseListener(this);
            this.wwd.removePositionListener(this);
        }

        this.wwd = wwd;
        this.segmentPlane.setWorldWindow(wwd);

        if (this.wwd != null)
        {
            this.wwd.getInputHandler().addMouseListener(this);
            this.wwd.addPositionListener(this);
        }
    }

    public SARTrack getTrack()
    {
        return this.track;
    }

    public void setTrack(SARTrack track)
    {
        if (this.track == track)
            return;

        if (this.track != null)
        {
            this.track.removePropertyChangeListener(this);
        }

        this.track = track;
        this.canInsertTrailingPoint = true;

        if (this.track != null)
        {
            this.track.addPropertyChangeListener(this);
        }
    }

    public boolean canMoveToNextTrackPoint()
    {
        return this.track != null && !this.waitingForNextPosition;
    }

    public void moveToNextTrackPoint()
    {
        if (this.track == null || this.waitingForNextPosition)
            return;

        this.start();
    }

    public boolean canRemoveLastTrackPoint()
    {
        return this.track != null && this.track.size() != 0;
    }

    public void removeLastTrackPoint()
    {
        if (this.track == null || this.track.size() == 0)
            return;

        int lastIndex = this.track.size() - 1;
        this.track.removePosition(lastIndex);
    }

    protected void start()
    {
        if (this.track.size() >= 1)
        {
            this.snapPlaneToLastTrackPoint();
            this.segmentPlane.setVisible(true);
        }
        else
        {
            this.segmentPlane.setVisible(false);
        }
        
        this.waitingForNextPosition = true;
        this.canInsertTrailingPoint = true;
    }

    protected void stop()
    {
        this.segmentPlane.setVisible(false);
    }

    protected void setNextPosition(Position position)
    {
        SARPosition trackPosition = this.positionToTrackPosition(position);

        this.ignoreTrackChangeEvents = true;
        try
        {
            this.track.appendPosition(trackPosition);
        }
        finally
        {
            this.ignoreTrackChangeEvents = false;
        }

        this.segmentPlane.getAttributes().setGeometryAttributes(SegmentPlane.SEGMENT_END, this.segmentEndGeomAttribs.copy());
        this.segmentPlane.getAttributes().setLabelAttributes(SegmentPlane.SEGMENT_END, this.segmentEndLabelAttribs.copy());

        this.snapPlaneToLastTrackSegment();
    }

    protected void setPotentialNextPosition(Position position)
    {
        this.potentialNextPosition = position;

        if (this.potentialNextPosition != null)
        {
            Position[] segmentPositions = this.segmentPlane.getSegmentPositions();

            this.segmentPlane.setSegmentPositions(segmentPositions[0], this.potentialNextPosition);

            this.segmentPlane.getAttributes().setGeometryAttributes(SegmentPlane.SEGMENT_END,
                this.createPotentialNextPositionGeomAttributes());
            this.segmentPlane.getAttributes().setLabelAttributes(SegmentPlane.SEGMENT_END,
                this.createPotentialNextPositionLabelAttributes());

            this.showSegmentEndPoint(true);
        }
        else
        {
            this.showSegmentEndPoint(false);
        }
    }

    protected PickedObject getTopPickedObject()
    {
        return (this.wwd.getSceneController().getPickedObjectList() != null) ?
            this.wwd.getSceneController().getPickedObjectList().getTopPickedObject() : null;
    }

    //**************************************************************//
    //********************  Mouse Events  **************************//
    //**************************************************************//

    public void mouseClicked(MouseEvent e)
    {
    }

    public void mousePressed(MouseEvent e)
    {
        if (e == null || e.isConsumed())
        {
            return;
        }

        if (!this.armed || this.wwd == null)
        {
            return;
        }

        if (e.getButton() == MouseEvent.BUTTON1)
        {
            if (this.waitingForNextPosition)
            {
                if (this.potentialNextPosition != null)
                {
                    this.setNextPosition(this.potentialNextPosition);
                    this.waitingForNextPosition = false;
                }
            }
        }
    }

    public void mouseReleased(MouseEvent e)
    {
    }

    public void mouseEntered(MouseEvent e)
    {
    }

    public void mouseExited(MouseEvent e)
    {
    }