/*
* @(#)Intersect.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.GridLayout;
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 find the intersection between two objects
*/
public class Intersect extends EditDialog implements PropertyChangeListener{
public static final int INTERSECT_ONE_POINT = 1;
public static final int INTERSECT_TWO_POINTS = 2;
JOptionPane optionPane;
JPanel pMainPanel = new JPanel();
JLabel lObject1 = new JLabel("Object 1");
JComboBox cObject1 = new JComboBox();
JLabel lObject2 = new JLabel("Object 2");
JComboBox cObject2 = new JComboBox();
public Intersect(JFrame frame, String title, Vector<GeometricalObject> Objects) {
super(frame, title, false, Objects);
setID(8);
jbInit();
pack();
}
private void jbInit() {
pMainPanel.setLayout(new GridLayout(2, 2, 20, 10));
pMainPanel.setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
pMainPanel.add(lObject1);
pMainPanel.add(cObject1);
pMainPanel.add(lObject2);
pMainPanel.add(cObject2);
Object[] options = {"Ok", "Cancel"};
optionPane = new JOptionPane(pMainPanel, JOptionPane.PLAIN_MESSAGE,
JOptionPane.OK_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")) {
intersectObjects();
}
else { //user closed dialog or clicked cancel
constructionCancelled();
clearAndHide();
}
}
}
public void clearAndHide() {
dispose();
}
private void intersectObjects() {
GeometricalObject object1 = (GeometricalObject)cObject1.getSelectedItem();
GeometricalObject object2 = (GeometricalObject)cObject2.getSelectedItem();
ConstructionStep step;
if ((object1 instanceof Line) && (object2 instanceof Line))
step = new ConstructionStep(this, new Object[]{object1,
object2}, INTERSECT_ONE_POINT);
else
step = new ConstructionStep(this, new Object[]{object1,
object2}, INTERSECT_TWO_POINTS);
doConstruction(step);
}
public void doConstruction(ConstructionStep step) {
if (step.getConstructionType() == INTERSECT_ONE_POINT) {
GeometricalObject object1 = (GeometricalObject)step.getInputs()[0];
GeometricalObject object2 = (GeometricalObject)step.getInputs()[1];
Point[] intersectionPoints = new Point[2];
if ((object1.canIntersect(object2)) && (object1.getType() != Point.TYPE)) {
intersectionPoints = (Point[])object1.intersect(object2);
intersectionPoints[0].addToObjects(objects);
clearAndHide();
step.setOutputs(intersectionPoints);
fireUndoableEditUpdate(new UndoableEditEvent(this, step));
}
else {
JOptionPane.showMessageDialog(this, "Objects cannot intersect",
"Try Again", JOptionPane.ERROR_MESSAGE);
initDialog();
}
}
else if (step.getConstructionType() == INTERSECT_TWO_POINTS) {
GeometricalObject object1 = (GeometricalObject)step.getInputs()[0];
GeometricalObject object2 = (GeometricalObject)step.getInputs()[1];
Point[] intersectionPoints = new Point[2];
if ((object1.canIntersect(object2)) && (object1.getType() != Point.TYPE)) {
intersectionPoints = (Point[])object1.intersect(object2);
intersectionPoints[0].addToObjects(objects);
intersectionPoints[1].addToObjects(objects);
clearAndHide();
step.setOutputs(intersectionPoints);
fireUndoableEditUpdate(new UndoableEditEvent(this, step));
}
else {
JOptionPane.showMessageDialog(this, "Objects cannot intersect",
"Try Again", JOptionPane.ERROR_MESSAGE);
initDialog();
}
}
else
System.err.println("Bad construction type");
}
public void undoConstruction(ConstructionStep step) {
if (step.getConstructionType() == INTERSECT_ONE_POINT) {
Point[] intersectionPoints = (Point[])step.getOutputs();
intersectionPoints[0].removeFromObjects(objects);
for (int i = 0; i<objects.size(); i++)
objects.elementAt(i).setNumber(i+1);
}
else if (step.getConstructionType() == INTERSECT_TWO_POINTS) {
Point[] intersectionPoints = (Point[])step.getOutputs();
intersectionPoints[0].removeFromObjects(objects);
intersectionPoints[1].removeFromObjects(objects);
for (int i = 0; i<objects.size(); i++)
objects.elementAt(i).setNumber(i+1);
}
else
System.err.println("Bad construction type");
}
public void redoConstruction(ConstructionStep step) {
if (step.getConstructionType() == INTERSECT_ONE_POINT) {
Point[] intersectionPoints = (Point[])step.getOutputs();
intersectionPoints[0].addToObjects(objects);
}
else if (step.getConstructionType() == INTERSECT_TWO_POINTS) {
Point[] intersectionPoints = (Point[])step.getOutputs();
intersectionPoints[0].addToObjects(objects);
intersectionPoints[1].addToObjects(objects);
}
else
System.err.println("Bad construction type");
}
public void initDialog() {
showObjects();
setLocationRelativeTo(null);
setVisible(true);
}
//Show a list of intersectable objects in the dialog box
private void showObjects() {
cObject1.removeAllItems();
cObject2.removeAllItems();
//display all lines and circles.
for(int t=(objects.size()-1);t>=0;t--) {
GeometricalObject ob = objects.elementAt(t);
if ((ob.getType() == Line.TYPE) || (ob.getType() == Circle.TYPE)) {
cObject1.addItem(ob);
cObject2.addItem(ob);
}
}
}
public String getPresentationName(ConstructionStep step) {
if ((step.getConstructionType() == INTERSECT_ONE_POINT) ||
(step.getConstructionType() == INTERSECT_TWO_POINTS))
return ("Intersect " + step.getInputs()[0] + " with " + step.getInputs()[1]);
else {
System.err.println("Bad construction type");
return "";
}
}
public String getDisplayName(ConstructionStep step) {
if (step.getConstructionType() == INTERSECT_ONE_POINT)
return ("Intersect " + step.getInputs()[0] + " with " + step.getInputs()[1] +
" - Output: " + step.getOutputs()[0]);
else if (step.getConstructionType() == INTERSECT_TWO_POINTS)
return ("Intersect " + step.getInputs()[0] + " with " + step.getInputs()[1] +
" - Output: " + step.getOutputs()[0] + ", " + step.getOutputs()[1]);
else {
System.err.println("Bad construction type");
return "";
}
}
}