Transcript Steps to planning an OOED application

Designing an Application in VB 6.0
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Define a Procedure Oriented application and show examples –
(procedur.exe)
Define an OOED (Object Oriented/Event Driven) Application
and show an example
Steps to Creating an OOED Application
Steps to Planning an OOED Application
Design Tips for the Application
Exercise:
◦ Create a TOE chart of the Skate Away Sales Order
Form
◦ Sketch the Interface (in the back of the sheet)
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Applications where the emphasis is on how to accomplish a
task.
Programmer must instruct the computer every step of the
way, from start to finish.
Requires that the program think in a step-by-step, top to
bottom approach.
Limitations:
◦ User has very little control over the data entered
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Sample apps: procedur.exe (under tut02 folder)
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Emphasis is on the objects and events included in the user
interface
Goal is to give the user as much control over the application
as possible.
Does not require that the programmer work in a step by step,
top to bottom approach.
Sample apps: OOED.exe (on the TUT02 folder)
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Plan the application
Build the user interface
Write the code for the application
Test and debug the application
Assemble the documentation
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Identify the tasks, objects and events using a TOE chart
(Task, Objects, Events)\
◦ The programmer creates objects and events for all
the tasks needed and names them.
◦ The programmers sketches the application using
one of these methods:
 Writing pseudocodes
 Flowcharts
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Information should flow vertically or horizontally, with the
most important information at the top left.
Commands buttons should be grouped together, along the
bottom of the screen or lower right corner.
Use no more than six command buttons
Use meaning and short captions (one to three words) in
buttons
Label each control. Align labels to the left , short, and one
line only.
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Using the sales order handout, do the following
◦ Write a TOE chart (decide how many controls to use
and name them.
◦ Sketch the user interface in the back of the page.