HowTo: Using the Wheel Control for Smart DevicesOfficial Content

Sometimes you need to navigate through the values a field can adopt. The wheel control has gained popularity with the touch screen interface and is very used in this cases. You can scroll through an enumarated domain or numeric values to select the value you want.

In this article it is explained the most important concepts of the wheel control and there is an example on how to use it.

For our example we will use the following transaction with Work With for Smart Devices object (WWSD) applied  (for further information see Applying Work With for Smart Devices Pattern).

WheelControlTRN

This control applies to the following data types:

We are going to focus on the last two.

On our transaction there is an enumerated and a numeric based attribute.

Enumerated Domain:

WheelControlEnumDomain

To enable the control go to the Section (under Detail node) selecting the Edit layout. Select the numeric attribute and change the Control Type property to SD Wheel.

WheelControlNumericProperties

This will enable some other properties.

General SD Wheel properties

Notify Context Change This property is used for event handling.
Display Style "Inline" or "As a picker" values. You can select how this control is seen. The default value is "As a picker". This property has effect only in iOS devices. For Android devices the wheel control is always displayed as a picker. This restriction is imposed by the plaform itself.
Cyclic You can enable this property if you want the last value to be continued by the first one.

 

For Numeric based attributes:

Step The incrementation from one value to another.
Min Value The minimum value the control will show to select.
Max Value The maximum value the control will enable you to select.

 

For our Enumerated attribute let's do the same:

Control type SD Wheel

 

WheelControlEnumProp

There are no particular properties enabled, just the General SD Wheel control properties.

Done, Hit F5. 

Examples

Numeric as a Picker:

WheelControliPadNum

Enumerated As a picker:

WheelContrloiPadEnum

Numeric Inline:

WheelControliPadInline

Numeric with decimals:

The wheel control can also be applied to a field based on a numeric with decimals. An example:

WheelControlDecimalTRN

WheelControlDecimalPattern

Using decimals we can specify decimal step (in our example 0.02) and after deploying the application the control is displayed as follows:

WheelControlDecimalImage

See also

HowTo: Using SD MultiWheel Control for Smart Devices

Videos

Start Video Work With for Smart Devices – General Aspects and List layout
Start Video WorkWith for Smart Devices – Detail Layout

 




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