Sometimes you need to navigate through the values a field can take. The wheel control has gained popularity with the touch screen interface and is widely used in such cases. You can scroll through an Enumerated Domain or Numeric values to select the value you want.
In this article, the most important concepts of the wheel control are explained and there is an example on how to use it.
This control applies to the following data types:
Let's focus on the last two.
The following Transaction object will be used with the Work With pattern applied.
The Transaction contains an attribute based on an Enumerated Domain (TrnCustomersEnumerated) and an attribute based on the Numeric data type (TrnCustomersNumWheel).
To enable the control, go to the Section (General) under Detail node, and select the Edit layout. Select the Numeric attribute (TrnCustomersNumWheel) and change the Control Type property to Wheel.
This will enable some other properties.
|Notify Context Change
||This property is used for event handling.
||"Inline" or "As a picker" values. You can select how this control is seen. The default value is "As a picker". This property has an effect only in Apple devices. For Android devices, the wheel control is always displayed as a picker. This restriction is imposed by the platform itself.
||You can enable this property if you want the last value to be continued by the first one.
For Numeric based attributes:
||The incrementation from one value to another.
||The minimum value the control will show to select.
||The maximum value the control will enable you to select.
For the Enumerated attribute let's do the same:
There are no particular properties enabled, just the General Wheel control properties.
Done, press F5.
The following pictures show you the wheel control according to its attributes.
Numeric as a Picker:
The wheel control can also be applied to a field based on a numeric with decimals. For example:
When using decimals you can specify decimal step (in the example 0.02) and after deploying the application the control is displayed as follows:
HowTo: Use MultiWheel Control