Table Of Contents
Selector Controls (G Dataflow)
Create a list that a user can cycle through to make selections.
Types of Selector Controls
Which Selector Control Should I Use?
Selector controls all contain a list of items from which the user can make a selection.
Unlike the strings listed in rings, enums, and radio button groups, the strings listed in a combo box have no numeric representation. Additionally, enums and radio button groups require these numeric values to be sequential, unsigned integer values, while rings allow for much more freedom in assigning a numeric value.
| Control | When to Use | Examples: E-Commerce Application |
|---|---|---|
| Ring | Use a ring when you want to provide a list of choices that represent numeric values. The ring control is a numeric input that allows the user to choose from a list of meaningful, human-readable values instead of numeric values. If the logic of your program prefers numeric values to string values, use a ring. |
You want to present the user with a list of product names, each of which corresponds to a unique product number. You can specify the products' numbers as their respective numeric values. You can then cross-reference those numeric values to find the prices of the items. |
| Enum and Radio Button Group | Use an enum or a radio button group when you want to provide a list of choices associated with an enumerated data type. If you want your program to deal with a fixed set of constants instead of arbitrary numeric data, use an enum or radio button group. In general, use a radio button group when you have less than five options for the user to select from. A radio button group can help the user quickly scan the options. |
You want to present the user with a list of shipping speed options for the item they want to order. The numeric values assigned to each of the options are automatically defined. You cannot edit the numeric values. You can use the enumerated data type in the enum control to drive the logic of your program. For example, because the names of the choices are part of the data type, you can use them to populate the cases of a Case Structure. This ensures that only valid states are used in your program. |
| Combo Box | Use a combo box when you want to provide a list of items for users to cycle through while also providing the option to type new values into the menu at edit time or run time. If the logic of your program requires string values rather than numeric values, use a combo box. |
You want to present the user with a list of previous shipping addresses, while also allowing them to enter a new shipping address for this purchase. |
Assigning Specific Values to Selector Controls
- Select the control to which you want to assign specific values.
- On the Item tab, in the Items group, assign and arrange specific values as desired.
Enabling a Combo Box to Accept New Values from the User at Edit Time or Run Time
- Select the combo box control.
- On the Item tab, in the Items group, select Allow Entry of Unlabeled Values.
Type-Ahead Functionality
As a user enters text into a combo box with typing enabled, the combo box suggests the closest match to the user's input.