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:qt and :qt-impl packages to prevent collision with :cl symbols and fix object with non smoke parent.
Annotate for file src/signal-slot/slot.lisp
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(in-package :cl-smoke.qt-impl)
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(defclass qslot (qt:object)
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((arguments :reader arguments :initarg :argument-types
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:documentation "List of the argument types for the slot.")
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(function :reader slot-function :initarg :slot-function
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:initform (error "no function specified")
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:documentation "The function called when the slot is invoked."))
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(:metaclass cxx:class)
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(:documentation "A Qt slot that calls its associated function"))
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(defun qt:make-slot (function &optional (arguments nil arguments-p))
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"Returns a slot that calls FUNCTION when it receives a signal."
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(if arguments-p
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(make-instance 'qslot
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:slot-function function
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:argument-types arguments)
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(make-instance 'qslot
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:slot-function function)))
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'
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(defmethod id ((slot qslot))
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(cxx:method-count (cxx:meta-object slot)))
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'
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(defparameter *sender* nil "The sender of the signal.")
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(defparameter *this* nil "The slot that is invoked.")
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(defmacro qt:sender ()
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"Returns the sender that invoked the slot."
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`*sender*)
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'
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(defmethod cxx:qt-metacall ((slot qslot) call id arguments)
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"Invoke the slots function when it is called. The return value
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of the invoked slot function is ignored."
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(let ((id (call-next-method)))
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(if (< id 0)
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id
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(if (enum= call qt:meta-object.+invoke-meta-method+)
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(progn
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(ccase id
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(0 (let ((*sender* (cxx:sender slot))
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(*this* slot))
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(with-simple-restart
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(continue "Skip the function ~A of slot ~A."
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(slot-function slot) slot)
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(apply (slot-function slot)
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(arguments-to-lisp arguments (arguments slot)))))))
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(1- id))
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id))))
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(defun find-signal-id (sender signal)
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"Returns the ID of SIGNAL from SENDER."
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;; For efficency assume that SIGNAL is normalized and fallback
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;; to normalzing when not. (Just like Qt does.)
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(let ((id (cxx:index-of-signal (cxx:meta-object sender)
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signal)))
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(when (< id 0)
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(setf id (cxx:index-of-signal (cxx:meta-object sender)
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(cxx:data (qt:meta-object.normalized-signature signal)))))
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(when (< id 0)
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(error "No signal ~S for class ~S."
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signal (class-of sender)))
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id))
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