How can I draw a custum graphic on a JMapPane?

[Guy PENDA]

Some javascript/style in this post has been disabled (why?)

I'm trying to draw an itinary on the map (JMapPane) based on a list of points or coordinates that defines the succesive positions of the object I'm tracking on the map. How can I do this ?
I've tried the following code but it dosen't work:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package tools;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Point;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.GeneralPath;
import java.awt.Rectangle;
import java.util.Iterator;
import java.util.List;
import org.geotools.gui.swing.JMapPane;

/**
 *
 * @author RAZ
 */
public class MyRouteDrawer {

    private static BasicStroke stroke = new BasicStroke(4.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
    private static boolean drawNumbers = false;
    private static boolean drawPoints = true;
    private static boolean drawMap = true;
    private static Color strokeColor = Color.YELLOW;
    private static int OVAL_SIZE = 2;
    private static Graphics2D g2;
    public static Shape shape = null;

    private static JMapPane MAP = null;

    /**
     * Draw route.
     *
     * @param coordList list of coordinates for route
     */
    public static void drawStraightRoute(List<Coordinate> coordList) {
        int x = 0, y = 0, prevX = 0, prevY = 0;
        int nr = 0;
        Iterator itr = coordList.iterator();
        Coordinate coord = (Coordinate) itr.next();

                g2.setStroke(stroke);
                g2.setColor(strokeColor);
        //Draw first point
        x = (int) calcX(coord.x);
        y = (int) calcY(coord.y);
        nr ++;
        if (drawPoints)
            g2.drawOval(x,y,OVAL_SIZE,OVAL_SIZE);
        if (drawNumbers)
            g2.drawString(nr + "",x,y);

        //Draw rest of route
        while (itr.hasNext()) {
            coord = (Coordinate) itr.next();
            prevX = x;
            prevY = y;
            nr++;

            x = (int) calcX(coord.x);
            y = (int) calcY(coord.y);

//            System.out.println("Drawing: " + x + ", " + y + ", " + prevX
//                    + ", " + prevY);
            g2.drawLine(x, y, prevX, prevY);// (startx, starty, prevx, prevy);
            if (drawPoints)
                g2.drawOval(x, y, OVAL_SIZE, OVAL_SIZE);
            //g2.drawString("Pos: " + coord.getX() + ", " + coord.getY(),x,y);
            if (drawNumbers)
                g2.drawString(nr + "", x, y);
            // + coord.getX() + ", " + coord.getY(), x, y);
//            drawBezierRoute(coordList);
        }
    }

    /** Drawing route in bezier splines */
    // TODO make this work nicely
    public static void drawBezierRoute(List<Coordinate> coordList) {
        double x1, x2, x3, x4, y1, y2, y3, y4;
        Shape curve = null;

        Iterator itr = coordList.iterator();
        Coordinate coord = (Coordinate) itr.next();
        x2 = calcX(coord.x);
        y2 = calcY(coord.y);

        coord = (Coordinate) itr.next();
        x3 = calcX(coord.x);
        y3 = calcY(coord.y);

        coord = (Coordinate) itr.next();
        x4 = calcX(coord.x);
        y4 = calcY(coord.y);
               
                g2.setStroke(stroke);
                g2.setColor(strokeColor);

            for (Coordinate coordz : coordList) {
                x1 = x2; x2 = x3; x3 = x4; x4 = calcX(coordz.x);
                y1 = y2; y2 = y3; y3 = y4; y4 = calcY(coordz.y);
    //            curve = new QuadCurve2D.Double(x1, y1, x2, y2, x3, y3);
//                double wx1 = x2 + (sqrt(pow(x1 - x2, 2))) / weight * x1 - x3;
//                double wy1 = y2 + (sqrt(pow(y1 - y2, 2))) / weight * y1 - y3;
//                double wx2 = x3 + (sqrt(pow(x2 - x3, 2))) / weight * x2 - x4;
//                double wy2 = y3 + (sqrt(pow(y2 - y3, 2))) / weight * y2 - y4;

                double wx1 = x2 + (x2-x1);
                double wy1 = y2 + (y2-y1);
                double wx2 = x3 + (x4-x3);
                double wy2 = y3 + (y4-y3);

    //            double wx1 = x2 + (sqrt(pow(x2 - x1, 2)
    //                    + (pow(y2 - y1, 2)))) / weight * x3 - x1;
    //            double wy1 = y2 + (sqrt(pow((x2 - x1), 2)
    //                    + (pow(y2 - y1, 2)))) / weight * y3 - y1;
    //            double wx2 = x3 + (sqrt(pow((x3 - x2), 2)
    //                    + (pow(y3 - y2, 2)))) / weight * x4 - x2;
    //            double wy2 = y3 + (sqrt(pow((x3 - x2), 2)
    //                    + (pow(y3 - y2, 2)))) / weight * y4 - y2;

    //            curve = new CubicCurve2D.Double(x1,y1,x2,y2,x3,y3,x4,y4);
                curve = new CubicCurve2D.Double(x2, y2, wx1, wy1,
                        wx2, wy2, x3, y3);
                g2.draw(curve);
            }
            shape = curve;
//        curve = new QuadCurve2D.Float(x, y, prevX, prevY, w * .9f, yy);
//        curve = new QuadCurve2D.Double(100, 100, 150, 150, 200, 100);
//
//        g2.draw(curve);
    }


    /**
     * Draw route.
     *
     * @param coordList list of coordinates for route
     */
    public static void drawStraightRoute1(List<Coordinate> coordList) {
        int x = 0, y = 0, prevX = 0, prevY = 0;
        int nr = 0;
        Iterator itr = coordList.iterator();
        Coordinate coord = (Coordinate) itr.next();

                g2.setStroke(stroke);
                g2.setColor(strokeColor);
               
        //Draw first point
        x = (int) calcX(coord.x);
        y = (int) calcY(coord.y);
        nr ++;
        if (drawPoints)
            g2.drawOval(x,y,OVAL_SIZE,OVAL_SIZE);
        if (drawNumbers)
            g2.drawString(nr + "",x,y);

        //Draw rest of route
        while (itr.hasNext()) {
            coord = (Coordinate) itr.next();
            prevX = x;
            prevY = y;
            nr++;

            x = (int) calcX(coord.x);
            y = (int) calcY(coord.y);

//            System.out.println("Drawing: " + x + ", " + y + ", " + prevX
//                    + ", " + prevY);
            g2.drawLine(x, y, prevX, prevY);// (startx, starty, prevx, prevy);
            if (drawPoints)
                g2.drawOval(x, y, OVAL_SIZE, OVAL_SIZE);
            //g2.drawString("Pos: " + coord.getX() + ", " + coord.getY(),x,y);
            if (drawNumbers)
                g2.drawString(nr + "", x, y);
            // + coord.getX() + ", " + coord.getY(), x, y);
//            drawBezierRoute(coordList);
        }
    }

    /** Drawing route in bezier splines */
    // TODO make this work nicely
    public static void drawBezierRoute1(List<Point> pointList) {
        double x1, x2, x3, x4, y1, y2, y3, y4;
        Shape curve = null;

        Iterator itr = pointList.iterator();
        Point point = (Point) itr.next();
        x2 = calcX(point.getX());
        y2 = calcY(point.getY());

        point = (Point) itr.next();
        x3 = calcX(point.getX());
        y3 = calcY(point.getY());

        point = (Point) itr.next();
        x4 = calcX(point.getX());
        y4 = calcY(point.getY());

                g2.setStroke(stroke);
                g2.setColor(strokeColor);
               
            for (Point pointz : pointList) {
                x1 = x2; x2 = x3; x3 = x4; x4 = calcX(pointz.getX());
                y1 = y2; y2 = y3; y3 = y4; y4 = calcY(pointz.getY());

                double wx1 = x2 + (x2-x1);
                double wy1 = y2 + (y2-y1);
                double wx2 = x3 + (x4-x3);
                double wy2 = y3 + (y4-y3);

                curve = new CubicCurve2D.Double(x2, y2, wx1, wy1,
                        wx2, wy2, x3, y3);
                g2.draw(curve);
            }
            shape = curve;
    }

    /**
     * Drawing route in bezier splines
     * @param coordList List of coordinates representing the different positions
     * to draw.
     */
    public static void drawBezierRoute2(List<Coordinate> coordList) {
        double x1, x2, x3, x4, y1, y2, y3, y4;
        GeneralPath curve = new GeneralPath();

        Iterator itr = coordList.iterator();
        Coordinate coord = (Coordinate) itr.next();
        x1 = calcX(coord.x);
        y1 = calcY(coord.y);
               
                curve.moveTo(x1, y1);

                g2.setStroke(stroke);
                g2.setColor(strokeColor);

                while(itr.hasNext()){
                    coord = (Coordinate) itr.next();

                    x2 = calcX(coord.x);
                    y2 = calcY(coord.y);

                    curve.lineTo(x2, y2);
                }

        g2.draw(curve);
        shape = curve;
        MAP.repaint();
    }

    public static Graphics2D getG2() {
        return g2;
    }

    public static void setG2(Graphics2D g2) {
        MyRouteDrawer.g2 = g2;
    }

    public static void setMAP(JMapPane MAP) {
        MyRouteDrawer.MAP = MAP;
    }

    public static void setDrawMap(boolean drawMap) {
        MyRouteDrawer.drawMap = drawMap;
    }

    public static void setDrawNumbers(boolean drawNumbers) {
        MyRouteDrawer.drawNumbers = drawNumbers;
    }

    public static void setDrawPoints(boolean drawPoints) {
        MyRouteDrawer.drawPoints = drawPoints;
    }

    public static void setShape(Shape shape) {
        MyRouteDrawer.shape = shape;
    }

    public static void setStroke(BasicStroke stroke) {
        MyRouteDrawer.stroke = stroke;
    }

    public static void setStrokeColor(Color strokeColor) {
        MyRouteDrawer.strokeColor = strokeColor;
    }


    /** Calculates x coordinate for plotting */
    public static double calcX(double mapX) {
//        return (ratio * (x - limits[0]));
        if(MAP == null)
            return mapX;
        else{
            Rectangle bounds = MAP.getBounds();
            Envelope mapArea = MAP.getMapArea();
            double width = mapArea.getWidth();          

            double frameX = ((mapX - mapArea.getMinX()) * (double)bounds.width)/width;

            return frameX;
        }
    }

    /** Calculates y coordinate for plotting */
    public static double calcY(double mapY) {
//        return -(ratio * (y - limits[3]));
       if(MAP == null)
            return mapY;
        else{
            Rectangle bounds = MAP.getBounds();
            Envelope mapArea = MAP.getMapArea();           
            double height = mapArea.getHeight();

            double frameY = (((mapArea.getMinY() - mapY) * (double)bounds.height)/height) + bounds.getHeight();

            return frameY;
        }
    }
}
In this class the Graphics2D object is initialize with the getGraphics() method of the JMapPane object.

Must I extend the JMapPane class to override the paint(Graphics g) method or paintComponent(Graphics g) method? Won't this have any impact on the showed map?
Or must I use a graph to do this?

---

Gratuit : Hotmail plus rapide avec Internet Explorer 8 ! Cliquez ici !
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
Geotools-gt2-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users

[mbedward]

Hello Guy,

Nice question.

Before looking at your code in detail I just want to find out if
you're using GeoTools 2.5.x or 2.6.x - the implementations of JMapPane
are different between the two.

Michael

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
Geotools-gt2-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users

[mbedward]

JMapPane and related classes have been rewritten for 2.6 so the API is
somewhat different to the 2.5 version.

It's bed time in my part of the world right now but I'll have a look
at your code tomorrow - unless someone else here can help you before
then.

Michael


2009/9/4 Guy PENDA <[hidden email]>:
> I'm using geotools 2.5.6!
> What's the different between both?
> I had the 2.6 version but no tutorial and to many differents with the other
> versions in the documentation and tutorials.
>

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
Geotools-gt2-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users

[mbedward]

Hello Guy,

Apologies for the long delay in replying - I'm disorganized.

As you suggest, the best way to achieve what you want is to override
the JMapPane.paintComponent.

protected void paintComponent(Graphics g) {
    // first call the map pane's method to draw the map
    super.paintComponent(g);

    // now draw your graphics on top of the map
    ....
}

Ideally the map pane would provide for one or more layers of graphics.
Someone worked on this in another unsupported module
(widgets-swing-pending) but it was never completed or documented.

If there is sufficient demand I could look at adding this to JMapPane
but that will have to wait until GeoTools 2.7.

Hope this helps. Let us know how you go.

Michael

------------------------------------------------------------------------------
Come build with us! The BlackBerry® Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9-12, 2009. Register now!
http://p.sf.net/sfu/devconf
_______________________________________________
Geotools-gt2-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users