Slides - Chapter 2

Slides - Chapter 2 - CHAPTER 2 DESIGNING USER INTERFACE 1...

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C HAPTER 2 D ESIGNING U SER I NTERFACE BMGT 302 Business Application Programming By Peng Huang R.H. Smith School of Business, University of Maryland 1
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P LANNING AN A PPLICATION Plan the application before creating the user interface Work jointly with the user to ensure the success of the application TOE (Task, Object, Event) chart : Shows application’s tasks, objects, and events 3
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P LANNING AN A PPLICATION ( CONT ' D .) 4
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S UNSHINE C ELLULAR C OMPANY Sunshine Cellular Company: Takes orders by phone for cell phones Two colors: blue and silver ($100 each) Currently the salespeople calculate the order quantity and order total (including sales tax) Develop an order-taking application for this company 5
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I DENTIFYING THE A PPLICATION S T ASKS Current order form used by Sunshine Cellular 6
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Tasks entered in a TOE chart 7 Input Processing Output Other
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I DENTIFYING THE O BJECTS Assign each task to an object in the user interface Text box : a control that allows the user to enter data Use labels to guide the user and display output information Use buttons to perform actions immediately after user clicks, such as to calculate totals, to clear the screen and to end the application 8
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Tasks and objects entered in a TOE chart 9
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I DENTIFYING THE E VENTS Next, determine which objects need an event to occur to allow the object to perform its task Text boxes : no special events needed for user to enter the text Labels : no special events needed to display the prompts Buttons : action must occur when each button is clicked 10
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Completed TOE chart ordered by task 11
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I DENTIFYING THE E VENTS ( CONT ' D .) Completed TOE chart ordered by object 12
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D ESIGNING THE U SER I NTERFACE Next step is to design the user interface Follow Windows GUI guidelines for: Consistency with Windows standards Ease of use Familiar look and feel makes the application easier to learn 13
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A RRANGING THE C ONTROLS ON A F ORM Design guidelines: Information should flow either vertically or horizontally
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Slides - Chapter 2 - CHAPTER 2 DESIGNING USER INTERFACE 1...

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