QT GUI Range

This block creates a variable with a choice of widgets. 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

Default Value

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

Start

Stop

Step

Widget

• Counter + Slider
• Counter
• Slider
• Knob

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.