Mega Code Archive
WeatherWizard JApplet
<![CDATA[
/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Composite;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class WeatherWizard extends JApplet implements ChangeListener {
WeatherPainter painter;
public void init() {
/* Turn off metal's use of bold fonts */
UIManager.put("swing.boldMetal", Boolean.FALSE);
}
public void start() {
initComponents();
}
public static void main(String[] args) {
JFrame f = new JFrame("Weather Wizard");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JApplet ap = new WeatherWizard();
ap.init();
ap.start();
f.add("Center", ap);
f.pack();
f.setVisible(true);
}
private BufferedImage loadImage(String name) {
String imgFileName = "images/weather-" + name + ".png";
URL url = WeatherWizard.class.getResource(imgFileName);
BufferedImage img = null;
try {
img = ImageIO.read(url);
} catch (Exception e) {
}
return img;
}
public void initComponents() {
setLayout(new BorderLayout());
JPanel p = new JPanel();
p.add(new JLabel("Temperature:"));
JSlider tempSlider = new JSlider(20, 100, 65);
tempSlider.setMinorTickSpacing(5);
tempSlider.setMajorTickSpacing(20);
tempSlider.setPaintTicks(true);
tempSlider.setPaintLabels(true);
tempSlider.addChangeListener(this);
p.add(tempSlider);
add("North", p);
painter = new WeatherPainter();
painter.sun = loadImage("sun");
painter.cloud = loadImage("cloud");
painter.rain = loadImage("rain");
painter.snow = loadImage("snow");
painter.setTemperature(65);
p.add("Center", painter);
}
public void stateChanged(ChangeEvent e) {
JSlider slider = (JSlider) e.getSource();
painter.setTemperature(slider.getValue());
}
}
class WeatherPainter extends Component {
int temperature = 65;
String[] conditions = { "Snow", "Rain", "Cloud", "Sun" };
BufferedImage snow = null;
BufferedImage rain = null;
BufferedImage cloud = null;
BufferedImage sun = null;
Color textColor = Color.yellow;
String condStr = "";
String feels = "";
Composite alpha0 = null, alpha1 = null;
BufferedImage img0 = null, img1 = null;
void setTemperature(int temp) {
temperature = temp;
repaint();
}
public Dimension getPreferredSize() {
return new Dimension(450, 125);
}
void setupText(String s1, String s2) {
if (temperature <= 32) {
textColor = Color.blue;
feels = "Freezing";
} else if (temperature <= 50) {
textColor = Color.green;
feels = "Cold";
} else if (temperature <= 65) {
textColor = Color.yellow;
feels = "Cool";
} else if (temperature <= 75) {
textColor = Color.orange;
feels = "Warm";
} else {
textColor = Color.red;
feels = "Hot";
}
condStr = s1;
if (s2 != null) {
condStr += "/" + s2;
}
}
void setupImages(BufferedImage i0) {
alpha0 = null;
alpha1 = null;
img0 = i0;
img1 = null;
}
void setupImages(int min, int max, BufferedImage i0, BufferedImage i1) {
float alpha = (max - temperature) / (float) (max - min);
alpha0 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
alpha1 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1 - alpha);
img0 = i0;
img1 = i1;
}
void setupWeatherReport() {
if (temperature <= 32) {
setupImages(snow);
setupText("Snow", null);
} else if (temperature <= 40) {
setupImages(32, 40, snow, rain);
setupText("Snow", "Rain");
} else if (temperature <= 50) {
setupImages(rain);
setupText("Rain", null);
} else if (temperature <= 58) {
setupImages(50, 58, rain, cloud);
setupText("Rain", "Cloud");
} else if (temperature <= 65) {
setupImages(cloud);
setupText("Cloud", null);
} else if (temperature <= 75) {
setupImages(65, 75, cloud, sun);
setupText("Cloud", "Sun");
} else {
setupImages(sun);
setupText("Sun", null);
}
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
Dimension size = getSize();
Composite origComposite;
setupWeatherReport();
origComposite = g2.getComposite();
if (alpha0 != null)
g2.setComposite(alpha0);
g2.drawImage(img0, 0, 0, size.width, size.height, 0, 0, img0.getWidth(null), img0
.getHeight(null), null);
if (img1 != null) {
if (alpha1 != null)
g2.setComposite(alpha1);
g2.drawImage(img1, 0, 0, size.width, size.height, 0, 0, img1.getWidth(null), img1
.getHeight(null), null);
}
g2.setComposite(origComposite);
// Freezing, Cold, Cool, Warm, Hot,
// Blue, Green, Yellow, Orange, Red
Font font = new Font("Serif", Font.PLAIN, 36);
g.setFont(font);
String tempString = feels + " " + temperature + "F";
FontRenderContext frc = ((Graphics2D) g).getFontRenderContext();
Rectangle2D boundsTemp = font.getStringBounds(tempString, frc);
Rectangle2D boundsCond = font.getStringBounds(condStr, frc);
int wText = Math.max((int) boundsTemp.getWidth(), (int) boundsCond.getWidth());
int hText = (int) boundsTemp.getHeight() + (int) boundsCond.getHeight();
int rX = (size.width - wText) / 2;
int rY = (size.height - hText) / 2;
g.setColor(Color.LIGHT_GRAY);
g2.fillRect(rX, rY, wText, hText);
g.setColor(textColor);
int xTextTemp = rX - (int) boundsTemp.getX();
int yTextTemp = rY - (int) boundsTemp.getY();
g.drawString(tempString, xTextTemp, yTextTemp);
int xTextCond = rX - (int) boundsCond.getX();
int yTextCond = rY - (int) boundsCond.getY() + (int) boundsTemp.getHeight();
g.drawString(condStr, xTextCond, yTextCond);
}
}
]]>