/*
* @(#)NodeFigure.java
*
* Project: JHotdraw - a GUI framework for technical drawings
* http://www.jhotdraw.org
* http://jhotdraw.sourceforge.net
* Copyright: � by the original author(s) and all contributors
* License: Lesser GNU Public License (LGPL)
* http://www.opensource.org/licenses/lgpl-license.html
*/
package org.jhotdraw.samples.net;
import org.jhotdraw.framework.*;
import org.jhotdraw.standard.*;
import org.jhotdraw.figures.*;
import org.jhotdraw.util.*;
import java.util.*;
import java.util.List;
import java.awt.*;
/**
* @version <$CURRENT_VERSION$>
*/
public class NodeFigure extends TextFigure {
private static final int BORDER = 6;
private List fConnectors;
private boolean fConnectorsVisible;
public NodeFigure() {
initialize();
fConnectors = null;
}
public Rectangle displayBox() {
Rectangle box = super.displayBox();
int d = BORDER;
box.grow(d, d);
return box;
}
public boolean containsPoint(int x, int y) {
// add slop for connectors
if (fConnectorsVisible) {
Rectangle r = displayBox();
int d = LocatorConnector.SIZE/2;
r.grow(d, d);
return r.contains(x, y);
}
return super.containsPoint(x, y);
}
private void drawBorder(Graphics g) {
Rectangle r = displayBox();
g.setColor(getFrameColor());
g.drawRect(r.x, r.y, r.width-1, r.height-1);
}
public void draw(Graphics g) {
super.draw(g);
drawBorder(g);
drawConnectors(g);
}
public HandleEnumeration handles() {
ConnectionFigure prototype = new LineConnection();
List handles = CollectionsFactory.current().createList();
handles.add(new ConnectionHandle(this, RelativeLocator.east(), prototype));
handles.add(new ConnectionHandle(this, RelativeLocator.west(), prototype));
handles.add(new ConnectionHandle(this, RelativeLocator.south(), prototype));
handles.add(new ConnectionHandle(this, RelativeLocator.north(), prototype));
handles.add(new NullHandle(this, RelativeLocator.southEast()));
handles.add(new NullHandle(this, RelativeLocator.southWest()));
handles.add(new NullHandle(this, RelativeLocator.northEast()));
handles.add(new NullHandle(this, RelativeLocator.northWest()));
return new HandleEnumerator(handles);
}
private void drawConnectors(Graphics g) {
if (fConnectorsVisible) {
Iterator iter = connectors();
while (iter.hasNext()) {
((Connector)iter.next()).draw(g);
}
}
}
/**
*/
public void connectorVisibility(boolean isVisible, ConnectionFigure courtingConnection) {
fConnectorsVisible = isVisible;
invalidate();
}
/**
*/
public Connector connectorAt(int x, int y) {
return findConnector(x, y);
}
/**
*/
private Iterator connectors() {
if (fConnectors == null) {
createConnectors();
}
return fConnectors.iterator();
}
private void createConnectors() {
fConnectors = CollectionsFactory.current().createList(4);
fConnectors.add(new LocatorConnector(this, RelativeLocator.north()) );
fConnectors.add(new LocatorConnector(this, RelativeLocator.south()) );
fConnectors.add(new LocatorConnector(this, RelativeLocator.west()) );
fConnectors.add(new LocatorConnector(this, RelativeLocator.east()) );
}
private Connector findConnector(int x, int y) {
// return closest connector
long min = Long.MAX_VALUE;
Connector closest = null;
Iterator iter = connectors();
while (iter.hasNext()) {
Connector c = (Connector)iter.next();
Point p2 = Geom.center(c.displayBox());
long d = Geom.length2(x, y, p2.x, p2.y);
if (d < min) {
min = d;
closest = c;
}
}
return closest;
}
private void initialize() {
setText("node");
Font fb = new Font("Helvetica", Font.BOLD, 12);
setFont(fb);
createConnectors();
}
/**
* Usually, a TextHolders is implemented by a Figure subclass. To avoid casting
* a TextHolder to a Figure this method can be used for polymorphism (in this
* case, let the (same) object appear to be of another type).
* Note, that the figure returned is not the figure to which the TextHolder is
* (and its representing figure) connected.
* @return figure responsible for representing the content of this TextHolder
*/
public Figure getRepresentingFigure() {
return this;
}
}