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CSE 3345 - Graphical User Interfaces

CSE 3345 - Graphical User Interfaces. Chris Raley craley@smu.edu Lecture 1 – HTML Warmup. HTML Warm-up. H – hyper T – text M – markup L – language . Markup Language. Used to give structure to a document Composed of tags to ‘mark ’ the data inside a document

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CSE 3345 - Graphical User Interfaces

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  1. CSE 3345 - Graphical User Interfaces Chris Raley craley@smu.edu Lecture 1 – HTML Warmup

  2. HTML Warm-up H – hyper T – text M – markup L – language CSE 3345

  3. Markup Language • Used to give structure to a document • Composed of tags to ‘mark’ the data inside a document • Tags encapsulate and classify data • Tags provide semantic markup or meaning to the data CSE 3345

  4. Markup Language Example <class> <teacher>Professor X</teacher> <students> <student age=“17”>Jean Grey</student> <student age=“16”>Scott Summers</student> </students> </class> CSE 3345

  5. Tags <class> <teacher>Professor X</teacher> <students> <student age=“17”>Kitty Pride</student> <student age=“16”>Scott Summers</student> </students> </class> CSE 3345

  6. Data <class> <teacher>Professor X</teacher> <students> <student age=“17”>Kitty Pride</student> <student age=“16”>Scott Summers</student> </students> </class> CSE 3345

  7. Tags Three types of tags Opening: <tag> Closing: </tag> Solo: <tag/> <tag>Data</tag><tag data=“”/> Opening Closing Solo CSE 3345

  8. Elements • Tags are also called elements • Can contain attributes, child elements, and data • An opening element must have a closing element • An element’s opening and closing tag must have the same name (case counts). GoodBad <element></element> <element></tron> CSE 3345

  9. Elements All information that belongs to an element must be contained between its opening and closing tags. CSE 3345

  10. A Bad example <friend> <name>Sally</name> <age>21</age> </friend> <gender>F</gender> CSE 3345

  11. A Good example <friend> <name>Sally</name> <age>21</age> <gender>F</gender> </friend> CSE 3345

  12. Attributes • Specify additional information about an element • Appears within the opening or solo tag <friend age=“21”>Sally</friend> <friend age=“21” name=“Sally”/> CSE 3345

  13. Root Element <class> <teacher>Professor X</teacher> <students> <student age=“17”>Jean Grey</student> <student age=“16”>Scott Summers</student> </students> </class> CSE 3345

  14. Root Element • There can only be ONE • Must be the first element • Describes what the document is composed of CSE 3345

  15. Dissecting the Document <dinner begins=“5:00pm” ends=“9:30pm” > <entrées> <entrée price=“4.95”>Hamburger</entrée> <entrée price=“1.95”>French Fries</entrée> </entrées> <drinks> <drink price=“1.95”>Milk Shake</drink> <drink price=“0.00”>Water</drink> </drinks> <desserts> <dessert price=“0.75”>Apple Pie</dessert> </desserts> </dinner> Find the root, elements, and attributes. How many unique elements are there? What is the data? What story does the document tell us? CSE 3345

  16. XML <?xml version="1.0" encoding="ISO-8859-15"?> <!DOCTYPE note SYSTEM "Note.dtd"> <class> <teacher>Professor X</teacher> <students> <student age=“17”>Kitty Pride</student> </students> </class> CSE 3345

  17. XML - Prolog <?xml version="1.0" encoding="ISO-8859-15"?> • Specifies version of document • Encoding type • DTD • Is optional (not needed) CSE 3345

  18. XML - DTD <!DOCTYPE note SYSTEM "Note.dtd"> DTD – Document Type Definition • Specifies the rules the document conforms to CSE 3345

  19. The XML Tree CSE 3345

  20. XML Trees • A computer represents an xml document in memory as a tree. CSE 3345

  21. Family Tree Dad Mom Brother Me Sister CSE 3345 CSE 3345

  22. XML Tree <class> <teacher>Professor X</teacher> <students> <student age=“17”>Jean Grey</student> <student age=“16”>Scott Summers</student> </students> </class> Class Teacher: Professor X Students Student: Scott Summers Student: Jean Grey CSE 3345

  23. XML Family Tree <dinner begins=“5:00pm” ends=“9:30pm” > <entrées> <entrée price=“4.95”>Hamburger</entrée> <entrée price=“1.95”>French Fries</entrée> </entrées> <drinks> <drink price=“1.95”>Milk Shake</drink> <drink price=“0.00”>Water</drink> </drinks> <desserts> <dessert price=“0.75”>Apple Pie</dessert> </desserts> </dinner> CSE 3345

  24. XML Family Tree Legend element data dinner drinks desserts entrees drink Water entrée Hamburger entrée French Fries drink Milk Shake dessert Apple Pie CSE 3345

  25. Family Tree Terms • Ancestor – Anyone that comes before you • Descendant – Anyone that comes after you • Parent – An element’s direct ancestor • Child – An element contained one level below another element • Sibling – When elements share the same parent CSE 3345

  26. Dissect the Family Tree Legend element data dinner drinks desserts entrees drink Water entrée Hamburger entrée French Fries drink Milk Shake dessert Apple Pie CSE 3345

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