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Pothos Widgets Toolkit

The Pothos widgets toolkit is a component of the Pothos data-flow framework. The toolkit contains a family of blocks that have graphical widget representations. Widget-aware blocks can be tied into the topology like any other block, but also have a associated widget that can be displayed and manipulated within the Pothos GUI.

Widgets table of contents

• Signal-analysis plotters
  • Waveform plotter
  • Periodogram plotter
  • Spectrogram plotter
  • Constellation plotter
  • Logic analyzer
• Misc control widgets
  • Planar selection
  • Numeric entry
  • Linear slider
  • Radio group
  • Drop down
  • Text display
  • Chat box

Signal-analysis plotters

The signal-analysis family of plotters can be used to visualize streaming sample data, and discrete packets of sample data. The axis and titles for all plotters can be hidden to make a really sleek and slimmed down visualization.

Waveform plotter

The waveform plotter is a multi-channel time-domain display widget.

Features:

• Automatically inferred data type from stream
• Supports multi-channel heterogeneous stream data types
• Displays stream labels as markers on the graph
• Supports zooming

Periodogram plotter

The periodogram plotter is a multi-channel frequency-domain display widget.

Features:

• Automatically inferred data type from stream
• Supports multi-channel heterogeneous stream data types
• Emits a frequency select signal when a frequency is double-clicked
• Supports bin averaging, and minimum and maximum hold channels
• Supports zooming

Spectrogram plotter

The spectrogram plotter is a single-channel frequency-domain display widget.

Features:

• Automatically inferred data type from stream
• Emits a frequency select signal when a frequency is double-clicked
• Supports zooming

Constellation plotter

The spectrogram plotter is a single-channel IQ plotter for complex data.

Features:

• Automatically inferred data type from stream
• Supports zooming

Logic analyzer

The logic analyzer displays discrete values for multiple streams. Its useful for debugging symbols, mappers, slicers, and other digital type blocks.

Features:

• Automatically inferred data type from stream
• Supports multi-channel heterogeneous stream data types
• Displays stream labels with the associated element

Misc control widgets

The control widgets are used for attaching simple GUI controls, and status monitors to the signals and slots system for live control and feedback display.

Planar selection

The planar select widget allows a user to select a point in a 2D space. An example use cause is visually adjusting a complex calibration value.

Numeric entry

The numeric entry widget is a combined slider and text box widget.

Linear slider

The slider widget is a linear slider to control floating point values.

Radio group

The widgets allow selection from set of options using radio buttons.

Drop down

The widgets allow selection from set of options using a drop down (or combo box).

Text display

Displays strings and numbers passed from a signal port.

Chat box

Instant message like interface for demonstrating messaging.