/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.logisim.gui.menu;
import com.cburch.logisim.gui.generic.LFrame;
import com.cburch.logisim.gui.start.About;
import com.cburch.logisim.util.MacCompatibility;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
import java.util.Locale;
import javax.help.HelpSet;
import javax.help.JHelp;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.WindowConstants;
import static com.cburch.logisim.util.LocaleString.*;
@SuppressWarnings("serial")
class MenuHelp extends JMenu implements ActionListener {
private LogisimMenuBar menubar;
private JMenuItem tutorial = new JMenuItem();
private JMenuItem guide = new JMenuItem();
private JMenuItem library = new JMenuItem();
private JMenuItem about = new JMenuItem();
private HelpSet helpSet;
private String helpSetUrl = "";
private JHelp helpComponent;
private LFrame helpFrame;
public MenuHelp(LogisimMenuBar menubar) {
this.menubar = menubar;
tutorial.addActionListener(this);
guide.addActionListener(this);
library.addActionListener(this);
about.addActionListener(this);
add(tutorial);
add(guide);
add(library);
if (!MacCompatibility.isAboutAutomaticallyPresent()) {
addSeparator();
add(about);
}
}
public void localeChanged() {
this.setText(getFromLocale("helpMenu"));
if (helpFrame != null) {
helpFrame.setTitle(getFromLocale("helpWindowTitle"));
}
tutorial.setText(getFromLocale("helpTutorialItem"));
guide.setText(getFromLocale("helpGuideItem"));
library.setText(getFromLocale("helpLibraryItem"));
about.setText(getFromLocale("helpAboutItem"));
if (helpFrame != null) {
helpFrame.setLocale(Locale.getDefault());
loadBroker();
}
}
@Override
public void actionPerformed(ActionEvent e) {
Object src = e.getSource();
if (src == guide) {
showHelp("guide");
} else if (src == tutorial) {
showHelp("tutorial");
} else if (src == library) {
showHelp("libs");
} else if (src == about) {
About.showAboutDialog(menubar.getParentWindow());
}
}
private void loadBroker() {
String helpUrl = getFromLocale("helpsetUrl");
if (helpUrl == null) {
helpUrl = "doc/doc_en.hs";
}
if (helpSet == null || helpFrame == null || !helpUrl.equals(helpSetUrl)) {
ClassLoader loader = MenuHelp.class.getClassLoader();
try {
URL hsURL = HelpSet.findHelpSet(loader, helpUrl);
if (hsURL == null) {
disableHelp();
JOptionPane.showMessageDialog(menubar.getParentWindow(),
getFromLocale("helpNotFoundError"));
return;
}
helpSetUrl = helpUrl;
helpSet = new HelpSet(null, hsURL);
helpComponent = new JHelp(helpSet);
if (helpFrame == null) {
helpFrame = new LFrame();
helpFrame.setTitle(getFromLocale("helpWindowTitle"));
helpFrame.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
helpFrame.getContentPane().add(helpComponent);
helpFrame.pack();
} else {
helpFrame.getContentPane().removeAll();
helpFrame.getContentPane().add(helpComponent);
helpComponent.revalidate();
}
} catch (Exception e) {
disableHelp();
e.printStackTrace();
JOptionPane.showMessageDialog(menubar.getParentWindow(),
getFromLocale("helpUnavailableError"));
return;
}
}
}
private void showHelp(String target) {
loadBroker();
try {
helpComponent.setCurrentID(target);
helpFrame.toFront();
helpFrame.setVisible(true);
} catch (Exception e) {
disableHelp();
e.printStackTrace();
JOptionPane.showMessageDialog(menubar.getParentWindow(),
getFromLocale("helpDisplayError"));
}
}
private void disableHelp() {
guide.setEnabled(false);
tutorial.setEnabled(false);
library.setEnabled(false);
}
}