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/*
* TestJava2d.java
*
* PostGIS extension for PostgreSQL JDBC driver - example and test classes
*
* (C) 2004 Paul Ramsey, [email protected]
*
* (C) 2005 Markus Schaber, [email protected]
*
* (C) 2015 Phillip Ross, [email protected]
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package examples;
import java.awt.*;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import org.postgis.java2d.Java2DWrapper;
public class TestJava2d {
private static final boolean DEBUG = true;
public static final Shape[] SHAPEARRAY = new Shape[0];
public static final String[][] testDataset = new String[][] {
{"point1", "POINT(10 11)"},
{"multipoint1", "MULTIPOINT(10.25 11,10.5 11,10.75 11,11 11,11.25 11,11.5 11,11.75 11,12 11)"},
{"linestring1", "LINESTRING(0 0,100 0,100 100,0 100)"},
{"linestring2", "LINESTRING(-310 110,210 110,210 210,-310 210,-310 110)"},
{"multilinestring", "MULTILINESTRING((0 0,10 10,20 0,30 10),(40 0,40 10,50 10,50 20,60 20))"},
};
static {
new Java2DWrapper(); // make shure our driver is initialized
}
public static void main(String[] args) throws ClassNotFoundException, SQLException {
if (args.length != 5) {
System.err.println("Usage: java examples/TestJava2D dburl user pass tablename column");
System.err.println();
System.err.println("dburl has the following format:");
System.err.println(Java2DWrapper.POSTGIS_PROTOCOL + "//HOST:PORT/DATABASENAME");
System.err.println("tablename is 'jdbc_test' by default.");
System.exit(1);
}
Shape[] geometries = read(args[0], args[1], args[2], "SELECT " + args[4] + " FROM " + args[3]);
if (DEBUG) {
System.err.println("read " + geometries.length + " geometries.");
}
if (geometries.length == 0) {
if (DEBUG) {
System.err.println("No geometries were read.");
}
return;
}
System.err.println("Painting...");
Frame window = new Frame("PostGIS java2D demo");
Canvas CV = new GisCanvas(geometries);
window.add(CV);
window.setSize(500, 500);
window.addWindowListener(new EventHandler());
window.setVisible(true);
}
static Rectangle2D calcbbox(Shape[] geometries) {
Rectangle2D bbox = geometries[0].getBounds2D();
for (int i = 1; i < geometries.length; i++) {
bbox = bbox.createUnion(geometries[i].getBounds2D());
}
return bbox;
}
private static Shape[] read(String dburl, String dbuser, String dbpass, String query)
throws ClassNotFoundException, SQLException {
ArrayList geometries = new ArrayList();
if (DEBUG) {
System.err.println("Creating JDBC connection...");
}
Class.forName("org.postgresql.Driver");
Connection conn = DriverManager.getConnection(dburl, dbuser, dbpass);
if (DEBUG) {
System.err.println("fetching geometries: " + query);
}
ResultSet r = conn.createStatement().executeQuery(query);
while (r.next()) {
final Shape current = (Shape) r.getObject(1);
if (current != null) {
geometries.add(current);
}
}
conn.close();
return (Shape[]) geometries.toArray(SHAPEARRAY);
}
public static class GisCanvas extends Canvas {
/** Keep java 1.5 compiler happy */
private static final long serialVersionUID = 1L;
final Rectangle2D bbox;
final Shape[] geometries;
public GisCanvas(Shape[] geometries) {
this.geometries = geometries;
this.bbox = calcbbox(geometries);
setBackground(Color.GREEN);
}
public void paint(Graphics og) {
Graphics2D g = (Graphics2D) og;
// Add 5% padding on all borders
final double paddingTop = bbox.getHeight() * 0.05;
final double paddingBottom = bbox.getHeight() * 0.05;
final double paddingLeft = bbox.getWidth() * 0.05;
final double paddingRight = bbox.getWidth() * 0.05;
// If the bounding box has negative coordinates, we need to offset by the negative coordinate
final double offsetX = (bbox.getX() < 0) ? (0 - bbox.getX()) : 0;
final double offsetY = (bbox.getY() < 0) ? (0 - bbox.getY()) : 0;
// Scale by the bounding box and padding
final double scaleX = (super.getWidth() - (paddingLeft + paddingRight)) / (bbox.getWidth());
final double scaleY = (super.getHeight() - (paddingTop + paddingBottom)) / (bbox.getHeight());
// Apply the transform parameters
AffineTransform at = new AffineTransform();
at.translate(paddingLeft, paddingTop);
at.scale(scaleX, scaleY);
at.translate(offsetX, offsetY);
if (DEBUG) {
System.err.println();
System.err.println("paddingTop: " + paddingTop);
System.err.println("paddingBottom: " + paddingBottom);
System.err.println("paddingLeft: " + paddingLeft);
System.err.println("paddingRight: " + paddingRight);
System.err.println("offsetX: " + offsetX);
System.err.println("offsetY: " + offsetY);
System.err.println("scaleX: " + scaleX);
System.err.println("scaleY: " + scaleY);
System.err.println("bbox: " + bbox);
System.err.println("trans: " + at);
System.err.println("new: " + at.createTransformedShape(bbox).getBounds2D());
System.err.println("visual:" + super.getBounds());
}
for (int i = 0; i < geometries.length; i++) {
g.setPaint(Color.BLUE);
final Shape shape = at.createTransformedShape(geometries[i]);
g.fill(shape);
g.setPaint(Color.ORANGE);
g.draw(shape);
}
}
}
public static class EventHandler implements WindowListener {
public void windowActivated(WindowEvent e) {//
}
public void windowClosed(WindowEvent e) {//
}
public void windowClosing(WindowEvent e) {
e.getWindow().setVisible(false);
System.exit(0);
}
public void windowDeactivated(WindowEvent e) {//
}
public void windowDeiconified(WindowEvent e) {//
}
public void windowIconified(WindowEvent e) {//
}
public void windowOpened(WindowEvent e) {//
}
}
}
