HSoM API

This page gives a list of important datatypes and functions in the HSoM library. For more information on the functions, types, and type classes listed here, please see the Haskell School of Music textbook or, from GHCi with Euterpea and HSoM imported, type the following:

:i nameYouWantToKnowAbout

Performance Functions and Type Classes

Function/Class	Description
hsomPerform	Player-based conversion from Music to Performance.
Performable	Type class with one function, perfDur, for performance with players.
playA	Like Euterpea’s play but for use with HSoM’s Players.
writeMidiA	Like Euterpea’s writeMidi, but for use with HSoM’s Players.

UISF Functions and Widgets

Function	Description
button	Button widget.
checkbox	Checkbox widget.
checkGroup	Collection of check box widgets.
defaultMUIParams	Default Window parameters for use with runMUI.
display	Display a value (requires a Show instance).
displayStr	Display a String without quotes.
getTime	Time since program start in milliseconds.
hSlider / hiSlider	Horizontal slider for continuous/discrete values.
label	Text label.
leftRight / rightLeft	Widgets get added from left to right or right to left.
listbox	List box widget.
radio	Collection of radio button widgets.
runMUI	Run a UISF Window using the UIParams (like defaultMUIParams).
runMUI’	Like runMUI but without the UIParams argument.
setLayout	Set window layout.
setSize	Set the window size.
stickyButton	Button that stays depressed when clicked and must be clicked again to release it.
textbox	Textbox widget that allows user input.
title	Set the title of a window.
topDown/bottomUp	Widgets get added from top to bottom or bottom to top.
vSlider/viSlider	Vertical slider for continuous/discrete values.
withDisplay	Attach a display to a value.

MIDI Widgets

Function	Description
selectInput	Select a MIDI input device.
midiIn	Receive from a MIDI input device.
midiInM	Receive from multiple MIDI input devices.
midiOut	Receive from a MIDI output device.
midiOutB	Send buffered, time-stamped events to a single MIDI output device.
midiOutM	Send to multiple MIDI output devices.
midiOutMB	Send buffered, time-stamped events to multiple MIDI output devices.
selectInputM	Select multiple MIDI input devices.
selectOutput	Select a MIDI output device.
selectOutputM	Select multiple MIDI output devices.