Slider

General
The Slider control allows the setting of a value using a slider. It may be used for values such as setpoint for control. Its default value may be retrieved with [controlName] or [[this]] in its own code for setting some aspect of the interface. The minimum (min) and maximum (max) properties may be set as integers and the spacing of tick marks may be adjusted. Once it has focus, by moving the mouse pointer on it, arrow keys may be used to adjust the position. If snapToTicks is enabled, it will move by the tick spacing with arrow keys or sliding it.
 

 Vertical and horizontal sliders are supported and will switch based on their height vs width.

Control Creation
Controls may be placed on the main or children interfaces using the Controls Palette, use F2 to open from the desired interface. When placing, it will ask for the name of the control, sld is the recommended prefix for the name, such as sldFlowRate. It will also ask for the text for the control to have. Once done, click a location or draw to desired size. Like most controls, the font size will be based on the height of the control.

A control may also be created using code, such as from a saved file, the Debug/CLI window, the microcontroller sending the string, or other controls.
 !makeSlider Name, Left, Right (,Width, Height, Min, Max, Value)     Parameters in () may be omitted.

If it is to be on a child interface:
 !interfaceName.makeSlider Name, Left, Right (,Width, Height, Text, Min, Max, Value)     Parameters in () may be omitted.

Example:
 !makeSlider sldPressure, 20,20,30,10,-50,50,25

Once placed, it may be repositioned and resized by unlocking the interface’s controls, F9, and dragging/sizing it. It may be copied or deleted by placing your mouse pointer over it and using CTRL-C and CTRL-X, and pasted using CTRL-V.

While it only supports integers, the value may be divided In code, for values in tenths for example:
 ? { [sldPressure] / 10 }

Instructions:
 Instructions are used to inform the control to perform some operation. The Slider has only those common to all controls.

See Instructions for more information on instructions.

Properties
 Properties are the look, ‘feel’, and other characteristics of a control or object. They may be viewed or set using the Debug/CLI or the Interface Editor. Placing the mouse pointer over a control and pressing F3 will open the Interface Editor. Here you may view all accessible properties of the control and modify them as desired. Please see the Interface Editor page for more information on the editor.

Properties may be set in code using:
 !controlName.property=someValue
 The default property, value, may be set with:
 !controlName=someValue

They may be read in code using:
 [controlName.property]
 The default property, value, may be read with:
 [controlName]

When used in its Event Code, [this] may be used in place of the controlName for reads and writes.

Ensure transparent is off when using the backColor.

Min and max are used to set the range of the slider as integers.

snapToTicks moves the slider by tick spacing, using the mouse or arrow keys.

Update Value
An Update Value is used to update a property of the control when new analog, digital or message data arrives and could be used to change the value, but this would be an uncommon use, such as setting the value to [ain0].

Event Code
When changed by either using the mouse or the arrow keys the event code will trigger. Please see Event Code for a full discussion on event code.

The use of !this.someCommand or !this.someProperty in the event code refers to the control that is running it, as does [this.someProperty] or [this] for the control’s name and [[this]] for the control’s default value. This allows controls to have the same generic code for unique purposes and reduce coding issues, such as if the name is changed.

Double-Clicking the Event Code text area will open the Code Editor where, like the Debug/CLI, it can provide contextual help and suggestions. Please see the Code Editor page for more information.

The code for a button control can be executed from other code in the interface using:
 !controlName.run or !controlName.

The control will trigger its normal event code when clicked. The only named trigger event the control currently supports is <load>, which will run its code when the !runLoad instruction is issued, which applies to all controls, or when !control.run <load> is used which will trigger the specific control. Load can be used to set a certain value in the control when the interface is loaded or !runLoad issued.

Please see advanced topics on using event triggers and passing data to events.

Supported Event Triggers:
Changing the value, no event trigger identifier used.
 <load>  Triggered when the !runLoad command is issued, such as when loading an interface.

More Information:

There exist multiple means of getting information about specific control values, properties, instructions, and events. The Control Editor shown above has abbreviated descriptions in the right-hand column. Expand the window and column to see more at once.

The Controls Viewer allows users to see detailed on controls. Open using F6 and expand out to find the information of interest including examples of use.

The Debug/CLI and Code Editor also provide contextual help. Please see those pages on using them for help.