[refactor] [structure] modularized project file structure

1 files changed, 260 insertions, 0 deletions

diff --git a/src/events/event-handler.lisp b/src/events/event-handler.lisp
new file mode 100644
index 0000000..bd40849
--- /dev/null
+++ b/src/events/event-handler.lisp
@@ -0,0 +1,260 @@
+;;;; event-handler.lisp
+
+(in-package #:wheelwork)
+
+
+(defclass/std event-handler ()
+  ((event-type handler-function :ri))
+  (:metaclass closer-mop:funcallable-standard-class))
+
+(defmethod initialize-instance :after ((eh event-handler) &key)
+  (with-slots (handler-function) eh
+    (closer-mop:set-funcallable-instance-function eh handler-function)))
+
+
+(defmacro defhandler (name handler)
+  "Defines a handler - binds (FDEFINITION NAME) to HANDLER, which
+should be an expression that evaluates to an instance of
+EVENT-HANDLER, which is funcallable.  It is define such that handlers
+can be redefined using this form to support interactive development."
+  (let ((handler-var (gensym)))
+    `(let ((,handler-var ,handler))
+       (if-let (extant (and (fboundp ',name)
+                            (fdefinition ',name)))
+         (closer-mop:set-funcallable-instance-function extant (handler-function ,handler-var))
+         (setf (fdefinition ',name) ,handler-var)))))
+
+
+(defmacro on-perframe
+    ((&optional (target 'target) (time 'time)) &body body)
+  "Creates a handler for 'PERFRAME events"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::perframe
+    :handler-function (lambda (,(intern (symbol-name target))
+                               ,(intern (symbol-name time)))
+                        (declare (ignorable ,(intern (symbol-name target))
+                                            ,(time (intern (symbol-name time)))))
+                        ,@body)))
+
+(defmacro on-keydown
+    ((&optional (target 'target) (scancode 'scancode) (modifiers 'modifiers)) &body body)
+  "Creates a lambda suitable for the value of a keydown event
+  handler. The function accepts two positional arguments TARGET and
+  SCANCODE and one &REST argument MODIFIERS.
+
+  SCANCODE will be a keyword of the form :SCANCODE-A, :SCANCODE-B ...
+
+  The members of MODIFIERS look like :LSHIFT, :RCTRL, RALT, etc"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::keydown
+    :handler-function (lambda (,(intern (symbol-name target))
+                               ,(intern (symbol-name scancode))
+                               &rest ,(intern (symbol-name modifiers)))
+                        (declare (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name scancode))
+                                            ,(intern (symbol-name modifiers))))
+                        ,@body)))
+
+(defmacro on-keyup
+    ((&optional (target 'target) (scancode 'scancode) (modifiers 'modifiers)) &body body)
+  "Creates a lambda suitable for the value of a keyup event
+  handler. The function accepts two positional arguments TARGET and
+  SCANCODE and one &REST argument MODIFIERS.
+
+  SCANCODE will be a keyword of the form :SCANCODE-A, :SCANCODE-B ...
+
+  The members of MODIFIERS look like :LSHIFT, :RCTRL, RALT, etc"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::keyup
+    :handler-function (lambda (,(intern (symbol-name target))
+                               ,(intern (symbol-name scancode))
+                               &rest ,(intern (symbol-name modifiers)))
+                        (declare (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name scancode))
+                                            ,(intern (symbol-name modifiers))))
+                        ,@body)))
+
+(defmacro on-mousemotion
+    ((&optional
+        (target 'target)
+        (x 'x) (y 'y)
+        (xrel 'xrel) (yrel 'yrel)
+        (state 'state)
+        (win-x 'win-x) (win-y 'win-y)
+        (win-xrel 'win-xrel) (win-yrel 'win-yrel))
+     &body body)
+  "Creates a handler for MOUSEMOTION events"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::mousemotion
+    :handler-function (lambda (,(intern (symbol-name target))
+                               ,(intern (symbol-name x))
+                               ,(intern (symbol-name y))
+                               ,(intern (symbol-name xrel))
+                               ,(intern (symbol-name yrel))
+                               ,(intern (symbol-name state))
+                               ,(intern (symbol-name win-x))
+                               ,(intern (symbol-name win-y))
+                               ,(intern (symbol-name win-xrel))
+                               ,(intern (symbol-name win-yrel)))
+                        (declare (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name x))
+                                            ,(intern (symbol-name y))
+                                            ,(intern (symbol-name xrel))
+                                            ,(intern (symbol-name yrel))
+                                            ,(intern (symbol-name state))
+                                            ,(intern (symbol-name win-x))
+                                            ,(intern (symbol-name win-y))
+                                            ,(intern (symbol-name win-xrel))
+                                            ,(intern (symbol-name win-yrel))))
+                        ,@body)))
+
+(defmacro on-mousedown
+    ((&optional (target 'target)
+        (x 'x) (y 'y)
+        (clicks 'clicks) (button 'button)
+        (win-x 'win-x) (win-y 'win-y))
+     &body body)
+  "Creates a handler for MOUSEDOWN events"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::mousedown
+    :handler-function (lambda
+                          (,(intern (symbol-name target))
+                               ,(intern (symbol-name x))
+                               ,(intern (symbol-name y))
+                               ,(intern (symbol-name clicks))
+                               ,(intern (symbol-name button))
+                               ,(intern (symbol-name win-x))
+                               ,(intern (symbol-name win-y)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name x))
+                                            ,(intern (symbol-name y))
+                                            ,(intern (symbol-name clicks))
+                                            ,(intern (symbol-name button))
+                                            ,(intern (symbol-name win-x))
+                                            ,(intern (symbol-name win-y))))
+                        ,@body)))
+
+(defmacro on-mouseup
+    ((&optional (target 'target)
+        (x 'x) (y 'y)
+        (clicks 'clicks) (button 'button)
+        (win-x 'win-x) (win-y 'win-y))
+     &body body)
+  "Creates a handler for MOUSEUP events"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::mouseup
+    :handler-function (lambda
+                          (,(intern (symbol-name target))
+                               ,(intern (symbol-name x))
+                               ,(intern (symbol-name y))
+                               ,(intern (symbol-name clicks))
+                               ,(intern (symbol-name button))
+                               ,(intern (symbol-name win-x))
+                               ,(intern (symbol-name win-y)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name x))
+                                            ,(intern (symbol-name y))
+                                            ,(intern (symbol-name clicks))
+                                            ,(intern (symbol-name button))
+                                            ,(intern (symbol-name win-x))
+                                            ,(intern (symbol-name win-y))))
+                        ,@body)))
+
+(defmacro on-mousewheel
+    ((&optional (target 'target) (horiz 'horiz) (vert 'vert) (dir 'dir)) &body body)
+  "Creates a handler for MOUSEWHEEL events"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::mousewheel
+    :handler-function (lambda
+                          (,(intern (symbol-name target))
+                               ,(intern (symbol-name horiz))
+                               ,(intern (symbol-name vert))
+                               ,(intern (symbol-name dir)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))
+                                            ,(intern (symbol-name horiz))
+                                            ,(intern (symbol-name vert))
+                                            ,(intern (symbol-name dir))))
+                        ,@body)))
+
+(defmacro on-blur
+    ((&optional (target 'target)) &body body)
+  "Creates a handler for BLUR events. BLUR is a psuedo event that
+fires whenever an object loses focus."
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::blur
+    :handler-function (lambda
+                          (,(intern (symbol-name target)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))))
+                        ,@body)))
+
+(defmacro on-focus
+    ((&optional (target 'target)) &body body)
+  "Creates a handler for a FOCUS event. FOCUS is a pusedo event that
+fires when the FOCUS slot of the current APPLICATION instance is changed.
+"
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::focus
+    :handler-function (lambda
+                          (,(intern (symbol-name target)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))))
+                        ,@body)))
+
+(defmacro on-before-dropped
+    ((&optional (target 'target)) &body body)
+  "Creates a handler for BEFORE-DROPPED events, which fire before a
+  unit is removed from its container."
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::before-dropped
+    :handler-function (lambda
+                          (,(intern (symbol-name target)))
+                        (declare
+                         (ignorable ,(intern (symbol-name target))))
+                        ,@body)))
+
+(defmacro on-before-added
+    ((&optional (container 'container) (target 'target)) &body body)
+  "Creates a handler for BEFORE-ADDED events, which fire before a unit
+  is added to a container."
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::before-added
+    :handler-function (lambda
+                          (,(intern (symbol-name container))
+                           ,(intern (symbol-name target)))
+                        (declare
+                         (ignorable
+                          ,(intern (symbol-name container))
+                          ,(intern (symbol-name target))))
+                        ,@body)))
+
+
+(defmacro on-after-added
+    ((&optional (container 'container) (target 'target)) &body body)
+  "Creates a handler for AFTER-ADDED events, which fire after a unit
+  is added to a container."
+  `(make-instance
+    'event-handler
+    :event-type 'wheelwork::after-added
+    :handler-function (lambda
+                          (,(intern (symbol-name container))
+                           ,(intern (symbol-name target)))
+                        (declare
+                         (ignorable
+                          ,(intern (symbol-name container))
+                          ,(intern (symbol-name target))))
+                        ,@body)))