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/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
*
* Contributors:
* PARC initial implementation
* ******************************************************************/
package figures.gui;
import figures.Point;
import figures.Line;
import figures.FigureElement;
import figures.Group;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.border.*;
public class FigurePanel extends JComponent {
ButtonsPanel bp = new ButtonsPanel();
FigureSurface fs = new FigureSurface();
ConsolePanel cp = new ConsolePanel();
public FigurePanel() {
setLayout(new BorderLayout());
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(fs);
panel.add(bp);
JSplitPane sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, panel, cp);
sp.setPreferredSize(new Dimension(500, 400));
sp.setDividerLocation(250);
add(BorderLayout.CENTER, sp);
}
class ButtonsPanel extends JPanel {
JLabel msgs = new JLabel("click to add a point or line");
public ButtonsPanel() {
setLayout(new FlowLayout(FlowLayout.LEFT));
add(new JButton(new AbstractAction("Main") {
public void actionPerformed(ActionEvent e) {
Main.main(new String[]{});
fs.repaint();
}
}));
add(msgs);
}
public void log(String msg) {
msgs.setText(msg);
}
}
static class ConsolePanel extends JPanel {
JTextArea text = new JTextArea();
public ConsolePanel() {
super(new BorderLayout());
text.setFont(StyleContext.getDefaultStyleContext().getFont("SansSerif", Font.PLAIN, 10));
JScrollPane scroller = new JScrollPane(text);
scroller.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(BorderLayout.CENTER, scroller);
}
public void println(String msg) {
text.append(msg + '\n');
}
}
final static Color BACKGROUND = Color.white;
static class FigureSurface extends JPanel implements MouseListener, MouseMotionListener {
Group canvas;
public FigureSurface() {
canvas = new Group(new Point(250, 250));
addMouseMotionListener(this);
addMouseListener(this);
setPreferredSize(new Dimension(500,500));
}
private Point addPoint(int x, int y) {
Point p = new Point(x, y);
canvas.add(p);
repaint();
return p;
}
private Line addLine(Point p1, Point p2) {
if (Math.abs(p1.getX()-p2.getX()) < 5 ||
Math.abs(p1.getY()-p2.getY()) < 5) {
return null;
}
Line line = null;
if (p1 != null && p2 != null) {
line = new Line(p1, p2);
canvas.add(line);
}
repaint();
return line;
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(BACKGROUND);
g2.fill(new Rectangle2D.Float(0f, 0f, (float)g2.getClipBounds().width, (float)g2.getClipBounds().height));
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
canvas.paint(g2);
}
int lastX, lastY;
int pressX, pressY;
FigureElement first = null;
Point point1 = null;
public void mousePressed(MouseEvent e){
int x = e.getX(), y = e.getY();
pressX = lastX = x; pressY = lastY = y;
first = findFigureElement(x, y);
if (first == null) {
point1 = addPoint(x, y);
}
}
public void mouseDragged(MouseEvent e) {
int x = e.getX(), y = e.getY(), dx = lastX-x, dy = lastY-y;
lastX = x;
lastY = y;
if (first == null) {
Line line = addLine(point1, new Point(x, y));
if (line != null) {
canvas.add(line.getP2());
first = line.getP2();
canvas.add(line);
}
} else {
first.move(-dx, -dy);
}
repaint();
}
public void mouseReleased(MouseEvent e){
mouseDragged(e);
first = null;
point1 = null;
}
public void mouseMoved(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
private FigureElement findFigureElement(int x, int y) {
Point2D p = new Point2D.Float((float)x, (float)y);
for (Iterator i = canvas.members(); i.hasNext(); ) {
FigureElement fe = (FigureElement)i.next();
if (fe.contains(p)) return fe;
}
return null;
}
}
}
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