Creating an Address Book with Basic GUI Components and HTML Viewer in Java

Viewing HTML in Swing

Homework • Display a dialog box that warns the user if a mnemonic is duplicated in a RunMenu • Look in the gui.run.RunMenu • Its just a warning

Midterm • write an addressbook using the gui.run components • You will need • RunButton, RunMenuItem, RunTextField, RunTextArea, RunMenu • Use Mnemonics and Keyboard accelerators

Look and feel

File Menu • Open • Save • Exit • Use xml.adbk.Address for your address record. Use xml.adbk. AddressBook to store your address.

HW For next week • Just build the GUI for the addressbook, you don’t have to make anything actually work. • No event handling is needed for next week. • You will need Run Method, but they will be • empty

You will learn • How to build an HTML viewer • About MIME data types • How to synthesize HTML • How to generate HTML forms

Network Layers • physical – bits (sonet) • data link layer – PPP (ATM) • Network layer – IP - routing • transport layer - TCP • session layer – login, creating a connection • presentation layer – html /process data • application layer - browser

How do I know my data type? • StreamSniffer! • HTML – enables the decoding of data by using a special string “MIME” • Multi-purpose Internet Mail Extension… • RFC – 1521 “text/html” “image/gif” “text/rtf” The mime string is in the header! • Filename suffix….not reliable.

What is an HTML viewer? • An application that renders HTML to the screen • Build a help file for my address book program!

Why Render HTML? • Process Data is decoded at the presentation layer. • Standard Markup language • Enables creation of a browser • Enables handy documentation viewer • Debug of HTML generators • Debug web servers

How Do I render HTML? • gui.html.HtmlViewer • renders some canned HTML

How does the HTML viewer work? • The heart of the HTML viewer: • javax.swing.JEditorPane • Embed an instance of the JEP in a • javax.swing.JScrollPane • jep.setContentType("text/html"); • jep.setText(s);/// then just display!

Using MIME • jep.setContentType("text/html"); • sets the type of data in the JEP • "text" indicates there is text in the string • "html" indicates we have an HTML data type.

What is MIME? • Multipurpose Internet Mail Extensions • It is a "string" with several predefined values.

Why do we have MIME? • In the beginning MAIL was only ASCII text. • Somebody wanted BINARY data too. • MTA = Mail Transfer Agents. • MTA is a program that moves mail from one NODE to another. • A node is just a computer than runs an MTA.

MIME identifies Data Types • Word documents are of a specific type! • They present process data. • GIF represents process data “sound/aiff” • AU represents process data. “sound/au” • There is not limit to the number of different data types. • MIME is used to introduce the data types.

Examples of Mime • "text/html" = html document • "text/rtf" = word RTF • "sound/aiff" = audio interchange format • "sound/au" = 8 bit voice grade format (SUN) • ....Lots of others....All documented in an RFC1521

MIME is used for • Mail • Browsers use MIME (mapping to plugins or helper apps). • JEditPanes • "text/html", "text/plain", "text/rtf", "image/gif".

How do we generate HTML? • "<html> <body> sdlkfdslfkj</body> </html>" • Just type it in! • Another way is to synthesize the HTML! • Try to write a toolkit for HTML synthesis.

Using the HTML Synthesizer • public String getHtml(String s) { • return "<html>\n" + s + "\n</html>"; • } • String s = getHtml("hello world"); • s="<html>\n helloworld \n </html>";

Building a list • public String getListItem(String s) { • return "<li>\n" + s + "\n</li>"; • } • s = getHtml(getListItem(li1)); • <html>...<li> li1 <li> </html>....

Creating an Address Book with Basic GUI Components and HTML Viewer in Java