Designing an Application in VB 6.0
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)
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 Sample apps: procedur.exe (under tut02 folder)
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)
1. Plan the application 2. Build the user interface 3. Write the code for the application 4. Test and debug the application 5. Assemble the documentation
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
1. Information should flow vertically or horizontally, with the most important information at the top left. 2. Commands buttons should be grouped together, along the bottom of the screen or lower right corner. 3. Use no more than six command buttons 4. Use meaning and short captions (one to three words) in buttons 5. Label each control. Align labels to the left, short, and one line only.
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.