System.Taffybar.Widget.Generic.Graph

This is a graph widget inspired by the widget of the same name in Awesome (the window manager). It plots a series of data points similarly to a bar graph. This version must be explicitly fed data with graphAddSample. For a more automated version, see PollingGraph.

Like Awesome, this graph can plot multiple data sets in one widget. The data sets are plotted in the order provided by the caller.

Note: all of the data fed to this widget should be in the range [0,1].

Types

data GraphHandle

data GraphConfig

The configuration options for the graph. The padding is the number of pixels reserved as blank space around the widget in each direction.

Constructors

GraphConfig

Fields

• graphPadding :: Int

  Number of pixels of padding on each side of the graph widget

• graphBackgroundColor :: RGBA

  The background color of the graph (default black)

• graphBorderColor :: RGBA

  The border color drawn around the graph (default gray)

• graphBorderWidth :: Int

  The width of the border (default 1, use 0 to disable the border)

• graphDataColors :: [RGBA]

  Colors for each data set (default cycles between red, green and blue)

• graphDataStyles :: [GraphStyle]

  How to draw each data point (default repeat Area)

• graphHistorySize :: Int

  The number of data points to retain for each data set (default 20)

• graphLabel :: Maybe String

  May contain Pango markup (default Nothing)

• graphWidth :: Int

  The width (in pixels) of the graph widget (default 50)

• graphDirection :: GraphDirection

  The direction in which the graph will move as time passes (default LEFT_TO_RIGHT)

data GraphDirection

Constructors

LEFT_TO_RIGHT

RIGHT_TO_LEFT

Instances

Eq GraphDirection

Methods

(==) :: GraphDirection -> GraphDirection -> Bool

(/=) :: GraphDirection -> GraphDirection -> Bool

data GraphStyle

The style of the graph. Generally, you will want to draw all Area graphs first, and then all Line graphs.

Constructors

Area

Thea area below the value is filled

Line

The values are connected by a line (one pixel wide)

Functions

graphNew :: MonadIO m => GraphConfig -> m (Widget, GraphHandle)

graphAddSample :: GraphHandle -> [Double] -> IO ()

Add a data point to the graph for each of the tracked data sets. There should be as many values in the list as there are data sets.

defaultGraphConfig :: GraphConfig