QT GUI Range

This block creates a variable with a choice of widgets. The variable can be given a default value and its value can be changed at runtime within a specified range.

The ID will be the variable name, so that ID can be used as a parameter in another block to make it adjustable in real-time.

Leave the label blank to use the variable id as the label.

This block does not support C++ output, so it cannot be used when the output language of a flowgraph in GRC is C++.

Parameters

Id (R)

ID of the variable

Label

The label of the variable

Type

• float
• int

Default Value (R)

The default value must be between the start and stop values.

Start

The starting value of the variable

Stop

The ending value of the variable

Step

The increment in the variable's values that will be shown on the widget

Widget

• Counter + Slider
• Counter
• Slider
• Knob

Minimum length

GUI hint

See GUI Hint for how to position the GUI within a window.

Example Flowgraph

The following flowgraph has three QT GUI Range blocks for the variables 'volume', 'tuning', and 'sq_lvl'.

The run-time window shows the three QT GUI Range widgets.