cs427-22 - UI Design OO UI design Evaluating a UI design 1...

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1 UI Design OO UI design Evaluating a UI design
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CS427 22-2 Joel on Software Affordance Metaphore “In most UI decisions, before you design  anything from scratch, you absolutely  have to look at what other popular  programs are doing and emulate that as  closely as possible. “
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CS427 22-3 Joel on Software Users don't have the manual, and if they  did, they wouldn't read it.  In fact, users can't read anything, and if  they could, they wouldn't want to. 
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CS427 22-4 UI Design UI design communicates to user User model should match design model Bad design model => bad UI design
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CS427 22-5 Single model Designers should have a single, coherent  model of the system Implementation should match that model The GUI should communicate that model The user model should match the design  model
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CS427 22-6 E-mail Tasks Read a message Check to see if there is more mail Reply to a new message Send a message to a set of people Stop half-way through writing a message and  wait till tomorrow Save a message
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CS427 22-7 Design Model Message Mailbox Incoming messages go to in-box Messages in out-box can be marked  “ready to be sent” New messages created in out-box Can move messages from one mailbox to  another
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CS427 22-8 Eudora
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CS427 22-9 Object-oriented user interface Objects represented by lists, icons
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