Graphics.UI.Qtah.Signal

General routines for managing Qt signals.

Documentation

data Signal object handler

A signal that can be connected to an instance of the object (C++) class, and when invoked will call a function of the given handler type.

Constructors

Signal

Fields

• internalConnectSignal :: object -> handler -> IO Bool
• internalName :: String

Instances

Show (Signal object handler)

Defined in Graphics.UI.Qtah.Signal

Methods

showsPrec :: Int -> Signal object handler -> ShowS

show :: Signal object handler -> String

showList :: [Signal object handler] -> ShowS

connect :: object -> Signal object handler -> handler -> IO Bool

Registers a handler function to listen to a signal an object emits. Returns true if the connection succeeded.

connect_ :: Show (Signal object handler) => object -> Signal object handler -> handler -> IO ()

Registers a handler function to listen to a signal an object emits, via connect. If the connection fails, then the program aborts.