jlibwiiuse/WiiUseJ/src/wiiusej/utils/GForcePanel.java

/**
 * This file is part of WiiuseJ.
 *
 *  WiiuseJ 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  WiiuseJ 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 WiiuseJ.  If not, see <http://www.gnu.org/licenses/>.
 */
package wiiusej.utils;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;

import wiiusej.values.GForce;
import wiiusej.wiiuseapievents.DisconnectionEvent;
import wiiusej.wiiuseapievents.WiimoteButtonsEvent;
import wiiusej.wiiuseapievents.IREvent;
import wiiusej.wiiuseapievents.MotionSensingEvent;
import wiiusej.wiiuseapievents.StatusEvent;
import wiiusej.wiiuseapievents.WiimoteListener;

/**
 * This panel is used to watch gravity force values from a MotionSensingEvent.
 * @author  guiguito
 */
public class GForcePanel extends javax.swing.JPanel implements WiimoteListener {

    private Image mImage;//image for double buffering
    private Color xColor = Color.RED;
    private Color yColor = Color.GREEN;
    private Color zColor = Color.BLUE;
    private Color backgroundColor = Color.WHITE;
    private Color lineColor = Color.BLACK;
    private ArrayList<GForce> values = new ArrayList<GForce>();

    /**
     * Default constructor of the AccelerationPanel.
     */
    public GForcePanel() {
        initComponents();
    }
    
    /**
     * Constructor used to choose the colors used by the AccelerationPanel.
     * @param bgColor background color.
     * @param xxColor color of the acceleration on X axis.
     * @param yyColor color of the acceleration on Y axis.
     * @param zzColor color of the acceleration on Z axis.
     * @param lColor line color.
     */
    public GForcePanel(Color bgColor, Color xxColor, Color yyColor, Color zzColor, Color lColor) {
        backgroundColor = bgColor;
        xColor = xxColor;
        yColor = yyColor;
        zColor = zzColor;
        lineColor = lColor;
        initComponents();
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Dimension d = getSize();
        checkOffScreenImage();
        Graphics offG = mImage.getGraphics();
        offG.setColor(backgroundColor);
        offG.fillRect(0, 0, d.width, d.height);
        Graphics2D g2 = (Graphics2D) mImage.getGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        //draw medium line
        double yMiddleFloat = getHeight() / 2.0;
        int yMiddle = (int) Math.round(yMiddleFloat);

        g2.setPaint(lineColor);
        g2.drawLine(0, yMiddle, getWidth(), yMiddle);

        GForce[] valuesArray = values.toArray(new GForce[0]);
        double unit = yMiddleFloat / 5.0;
        int previousX = 0;
        int previousY = 0;
        int previousZ = 0;
        //draw curves
        for (int i = 0; i < valuesArray.length && i < getWidth(); i++) {
            GForce gforce = valuesArray[i];
            //draw X
            g2.setPaint(xColor);
            int yDelta = (int) Math.round(unit * gforce.getX());
            int y = -1 * yDelta + yMiddle;
            g2.drawLine(i - 1, previousX, i, y);
            g2.setTransform(new AffineTransform());
            previousX = y;
            //draw Y
            g2.setPaint(yColor);
            yDelta = (int) Math.round(unit * gforce.getY());
            y = -1 * yDelta + yMiddle;
            g2.drawLine(i - 1, previousY, i, y);
            g2.setTransform(new AffineTransform());
            previousY = y;
            //draw Z
            g2.setPaint(zColor);
            yDelta = (int) Math.round(unit * gforce.getZ());
            y = -1 * yDelta + yMiddle;
            g2.drawLine(i - 1, previousZ, i, y);
            g2.setTransform(new AffineTransform());
            previousZ = y;
        }

        //draw legend
        g2.setPaint(xColor);
        g2.drawLine(5, getHeight() - 10, 25, getHeight() - 10);
        g2.setPaint(yColor);
        g2.drawLine(60, getHeight() - 10, 80, getHeight() - 10);
        g2.setPaint(zColor);
        g2.drawLine(120, getHeight() - 10, 140, getHeight() - 10);

        g2.setPaint(lineColor);
        g2.drawString("X", 30, getHeight() - 5);
        g2.drawString("Y", 85, getHeight() - 5);
        g2.drawString("Z", 145, getHeight() - 5);
        g2.drawString("0", 2, yMiddle-5);
        g2.drawString("5", 2, 10);
        g2.drawString("-5", 2, getHeight()-15);
        //put offscreen image on the screen
        g.drawImage(mImage, 0, 0, null);
    }

    /**
     * check if the mImage variable has been initialized. If it's not the case it initializes it
     * with the dimensions of the panel. mImage is for double buffering.
     */
    private void checkOffScreenImage() {
        Dimension d = getSize();
        if (mImage == null || mImage.getWidth(null) != d.width || mImage.getHeight(null) != d.height) {
            mImage = createImage(d.width, d.height);
        }
    }

    public void onButtonsEvent(WiimoteButtonsEvent arg0) {
    //nothing
    }

    public void onIrEvent(IREvent arg0) {
    //nothing
    }

    public void onMotionSensingEvent(MotionSensingEvent arg0) {
        if (values.size() >= getWidth()) {
            //if there are as many values as pixels in the width
            //clear points
            values.clear();
        }
        values.add(arg0.getGforce());
        repaint();
    }

    public void onStatusEvent(StatusEvent arg0) {
    //nothing
    }

    public void onDisconnectionEvent(DisconnectionEvent arg0) {
        //Clear points.
        values.clear();
        repaint();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}