/*
* @(#)CoordinateCircle.java 1.0
* Copyright (C) 2004,2005 Aravind Alwan
*
* This file is part of CRANKS.
*
* CRANKS 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 2 of the License, or
* (at your option) any later version.
*
* CRANKS 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. A copy of the GNU
* General Public License is provided in LICENSE.txt, which is located
* in the installation directory of CRANKS.
*
* You may also obtain a copy of the GNU General Public License
* by writing to the Free Software Foundation, Inc., 51 Franklin St,
* Fifth Floor, Boston, MA 02110-1301 USA
*/
package cranks.ui;
import javax.swing.*;
import javax.swing.event.UndoableEditEvent;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Vector;
import cranks.undo.ConstructionStep;
import cranks.geom.Line;
import cranks.geom.Circle;
import cranks.geom.Point;
import cranks.geom.GeometricalObject;
/**
* This class is used to draw circles
*/
public class CoordinateCircle extends EditDialog implements PropertyChangeListener,
ActionListener {
public static final int CENTRE_RADIUS = 1;
public static final int THREE_POINTS = 2;
JTabbedPane tabbedPane = new JTabbedPane();
JOptionPane optionPane;
JPanel pCentreRadius = new JPanel();
JPanel pCentre = new JPanel();
JLabel lCentre = new JLabel("Centre");
JComboBox cCentrePoint = new JComboBox(); //to select centre
JPanel pRadius = new JPanel(); //to specify radius
JRadioButton rbRadiusValue = new JRadioButton("Value", true);
JTextField tfRadius = new JTextField(); //by value
JRadioButton rbRadiusReference = new JRadioButton("Reference", false);
JComboBox cRadiusReference = new JComboBox(); //with reference to another object
ButtonGroup bgRadius = new ButtonGroup();
JPanel pThreePoints = new JPanel();
JLabel lPoint1 = new JLabel("Point 1");
JComboBox cPoint1 = new JComboBox(); //to select point1
JLabel lPoint2 = new JLabel("Point 2");
JComboBox cPoint2 = new JComboBox(); //to select point2
JLabel lPoint3 = new JLabel("Point 3");
JComboBox cPoint3 = new JComboBox(); //to select point3
public CoordinateCircle(JFrame frame, String title,
Vector<GeometricalObject> Objects) {
super(frame, title, false, Objects);
setID(1);
jbInit();
pack();
}
private void jbInit() {
pCentreRadius.setLayout(new BoxLayout(pCentreRadius, BoxLayout.PAGE_AXIS));
pCentreRadius.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
pCentre.add(lCentre);
pCentre.add(cCentrePoint);
pRadius.setLayout(new GridLayout(2, 2, 20, 10));
pRadius.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Radius"),
BorderFactory.createEmptyBorder(5, 5, 5, 5)));
pRadius.add(rbRadiusValue);
pRadius.add(tfRadius);
tfRadius.setDragEnabled(true);
pRadius.add(rbRadiusReference);
pRadius.add(cRadiusReference);
bgRadius.add(rbRadiusValue);
bgRadius.add(rbRadiusReference);
rbRadiusValue.addActionListener(this);
rbRadiusReference.addActionListener(this);
pCentreRadius.add(pCentre);
pCentreRadius.add(pRadius);
pThreePoints.setLayout(new GridLayout(3,2, 20, 20));
pThreePoints.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
pThreePoints.add(lPoint1);
pThreePoints.add(cPoint1);
pThreePoints.add(lPoint2);
pThreePoints.add(cPoint2);
pThreePoints.add(lPoint3);
pThreePoints.add(cPoint3);
tabbedPane.addTab("Centre & Radius", null, pCentreRadius,
"Specify Centre Point and Radius");
tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);
tabbedPane.addTab("Three Points", null, pThreePoints,
"Specify Three Points");
tabbedPane.setMnemonicAt(1, KeyEvent.VK_2);
Object[] options = {"Ok", "Copy Field Value", "Cancel"};
optionPane = new JOptionPane(tabbedPane, JOptionPane.PLAIN_MESSAGE,
JOptionPane.YES_NO_CANCEL_OPTION, null, options, options[0]);
setContentPane(optionPane);
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
addWindowListener(new JDialogWindowAdapter(this));
optionPane.addPropertyChangeListener(this);
}
public void propertyChange(PropertyChangeEvent e) {
if (isVisible() && (e.getSource() == optionPane) &&
(JOptionPane.VALUE_PROPERTY.equals(e.getPropertyName()))) {
Object value = optionPane.getValue();
if (value == JOptionPane.UNINITIALIZED_VALUE) {
return;
}
//Reset the JOptionPane's value.
//If you don't do this, then if the user
//presses the same button next time, no
//property change event will be fired.
optionPane.setValue(JOptionPane.UNINITIALIZED_VALUE);
if (value.equals("Ok")) {
createCircle();
}
else if (value.equals("Copy Field Value")) {
mfInstance.ActionShowFieldValue.invoke();
}
else { //user closed dialog or clicked cancel
constructionCancelled();
clearAndHide();
}
}
}
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() instanceof JRadioButton)
setEnabled();
}
public void setEnabled() {
tfRadius.setEnabled(rbRadiusValue.isSelected());
cRadiusReference.setEnabled(rbRadiusReference.isSelected());
}
public void clearAndHide() {
tfRadius.setText("");
dispose();
}
private void createCircle() {
if (tabbedPane.getSelectedComponent() == pCentreRadius) {
Point centre = (Point)cCentrePoint.getSelectedItem();
Object radius;
try {
if (rbRadiusValue.isSelected())
radius = new Double(Double.parseDouble(tfRadius.getText()));
else
radius = (GeometricalObject)cRadiusReference.getSelectedItem();
} catch (NumberFormatException e) {
tfRadius.selectAll();
JOptionPane.showMessageDialog(this, "Please enter numerical value for radius",
"Try Again", JOptionPane.ERROR_MESSAGE);
tfRadius.requestFocus(true);
return;
}
ConstructionStep step = new ConstructionStep(this, new Object[]{centre,
radius}, CENTRE_RADIUS);
doConstruction(step);
}
if (tabbedPane.getSelectedComponent() == pThreePoints) {
Point point1 = (Point)cPoint1.getSelectedItem();
Point point2 = (Point)cPoint2.getSelectedItem();
Point point3 = (Point)cPoint3.getSelectedItem();
ConstructionStep step = new ConstructionStep(this, new Object[]{point1,
point2, point3}, THREE_POINTS);
doConstruction(step);
}
}
public void doConstruction(ConstructionStep step) {
if (step.getConstructionType() == CENTRE_RADIUS) {
Point centre = (Point)step.getInputs()[0];
Object obj1 = step.getInputs()[1];
boolean radiusReference = (obj1 instanceof GeometricalObject);
double radius;
if (radiusReference) {
if (step.getInputs()[1] instanceof Line)
radius = ((Line)obj1).getLength();
else
radius = ((Circle)obj1).getRadius();
}
else {
radius = ((Double)obj1).doubleValue();
if (!(radius > 0)) {
JOptionPane.showMessageDialog(this, "Please enter positive value for " +
"radius", "Try Again", JOptionPane.ERROR_MESSAGE);
initDialog();
}
}
Circle newCircle = new Circle(centre, radius);
newCircle.addToObjects(objects);
if (radiusReference)
if (obj1 instanceof Line) {
((Line)obj1).addPropertyChangeListener(Line.PROP_LENGTH, newCircle);
newCircle.addPropertyChangeListener(Circle.PROP_RADIUS, (Line)obj1);
}
else {
((Circle)obj1).addPropertyChangeListener(Circle.PROP_RADIUS, newCircle);
newCircle.addPropertyChangeListener(Circle.PROP_RADIUS, (Circle)obj1);
}
clearAndHide();
step.setOutputs(new Object[]{newCircle});
fireUndoableEditUpdate(new UndoableEditEvent(this, step));
}
else if (step.getConstructionType() == THREE_POINTS) {
Point point1 = (Point)step.getInputs()[0];
Point point2 = (Point)step.getInputs()[1];
Point point3 = (Point)step.getInputs()[2];
Line line12 = new Line(point1, point2);
Line line23 = new Line(point2, point3);
if (!((line12.isParallel(line23))||(point1.equalTo(point2))
|| (point2.equalTo(point3)) || (point3.equalTo(point1)))) {
Circle newCircle = new Circle(point1, point2, point3);
newCircle.addToObjects(objects);
clearAndHide();
step.setOutputs(new Object[]{newCircle.getCentre(), newCircle});
fireUndoableEditUpdate(new UndoableEditEvent(this, step));
}
else {
JOptionPane.showMessageDialog(this, "Select three distinct"
+ " non-collinear points", "Try Again", JOptionPane.ERROR_MESSAGE);
initDialog();
}
}
else {
System.err.println("Bad construction type");
}
}
public void undoConstruction(ConstructionStep step) {
if ((step.getConstructionType() == CENTRE_RADIUS) ||
(step.getConstructionType() == THREE_POINTS)) {
for(int i = 0; i < step.getOutputs().length; i++)
((GeometricalObject)step.getOutputs()[i]).removeFromObjects(objects);
for (int i = 0; i<objects.size(); i++)
objects.elementAt(i).setNumber(i+1);
if (step.getConstructionType() == CENTRE_RADIUS) {
Object obj1 = step.getInputs()[1];
Circle newCircle = (Circle)step.getOutputs()[0];
if (!(obj1 instanceof Double))
if (obj1 instanceof Line) {
((Line)obj1).removePropertyChangeListener(Line.PROP_LENGTH, newCircle);
newCircle.removePropertyChangeListener(Circle.PROP_RADIUS, (Line)obj1);
}
else {
((Circle)obj1).removePropertyChangeListener(Circle.PROP_RADIUS, newCircle);
newCircle.removePropertyChangeListener(Circle.PROP_RADIUS, (Circle)obj1);
}
}
}
else {
System.err.println("Bad construction type");
}
}
public void redoConstruction(ConstructionStep step) {
if ((step.getConstructionType() == CENTRE_RADIUS) ||
(step.getConstructionType() == THREE_POINTS)) {
for(int i = 0; i < step.getOutputs().length; i++)
((GeometricalObject)step.getOutputs()[i]).addToObjects(objects);
if (step.getConstructionType() == CENTRE_RADIUS) {
Object obj1 = step.getInputs()[1];
Circle newCircle = (Circle)step.getOutputs()[0];
if (!(obj1 instanceof Double))
if (obj1 instanceof Line) {
((Line)obj1).addPropertyChangeListener(Line.PROP_LENGTH, newCircle);
newCircle.addPropertyChangeListener(Circle.PROP_RADIUS, (Line)obj1);
}
else {
((Circle)obj1).addPropertyChangeListener(Circle.PROP_RADIUS, newCircle);
newCircle.addPropertyChangeListener(Circle.PROP_RADIUS, (Circle)obj1);
}
}
}
else {
System.err.println("Bad construction type");
}
}
public void initDialog() {
showObjects();
setLocationRelativeTo(null);
setEnabled();
setVisible(true);
}
private void showObjects() {
cCentrePoint.removeAllItems();
cRadiusReference.removeAllItems();
cPoint1.removeAllItems();
cPoint2.removeAllItems();
cPoint3.removeAllItems();
//display the object numbers of all the points clicked by the user
for(int t = (objects.size()-1); t >= 0; t--){
if (objects.elementAt(t).getType() == Point.TYPE) {
cPoint1.addItem(objects.elementAt(t));
cPoint2.addItem(objects.elementAt(t));
cPoint3.addItem(objects.elementAt(t));
cCentrePoint.addItem(objects.elementAt(t));
}
if ((objects.elementAt(t).getType() == Line.TYPE) ||
(objects.elementAt(t).getType() == Circle.TYPE))
cRadiusReference.addItem(objects.elementAt(t));
}
}
public String getPresentationName(ConstructionStep step) {
if ((step.getConstructionType() == CENTRE_RADIUS) ||
(step.getConstructionType() == THREE_POINTS))
return ("Construct " + step.getOutputs()[step.getOutputs().length - 1]);
else {
System.err.println("Bad construction type");
return "";
}
}
public String getDisplayName(ConstructionStep step) {
if (step.getConstructionType() == CENTRE_RADIUS)
return ("Construct circle with centre " + step.getInputs()[0] +
" and radius of length " + step.getInputs()[1] + " - Output: " +
step.getOutputs()[0]);
else if (step.getConstructionType() == THREE_POINTS)
return ("Construct circle using " + step.getInputs()[0] + " , " +
step.getInputs()[1] + " and " + step.getInputs()[2] + " - Output: " +
step.getOutputs()[0] + ", " + step.getOutputs()[1]);
else {
System.err.println("Bad construction type");
return "";
}
}
}