1 / 22

Viewing HTML in Swing

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

kat
Download Presentation

Viewing HTML in Swing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Viewing HTML in Swing

  2. 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

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

  4. Look and feel

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

  6. 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

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

  8. 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

  9. 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.

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

  11. 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

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

  13. 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!

  14. 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.

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

  16. 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.

  17. 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.

  18. 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

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

  20. 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.

  21. 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>";

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

More Related