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+;;; 01-image-transforms-and-events.lisp
+
+(defpackage #:ww.examples/2
+  (:use #:cl)
+  (:export #:start))
+
+(in-package :ww.examples/2)
+
+(defclass image-transforms-etc (ww::application ) ())
+
+(defvar *shared-anim-table* (make-hash-table :synchronized t))
+
+(ww::defhandler move-thing
+    (ww::on-keydown ()
+      "Move the target around, grow and shrink it. Print out its
+       position no matter what happens."
+      (case scancode
+        (:scancode-left (decf (ww::x target) 4))
+        (:scancode-right (incf (ww::x target) 4))
+        (:scancode-down (decf (ww::y target) 4))
+        (:scancode-up (incf (ww::y target) 4))
+        (:scancode-w (incf (ww::width target) 20))
+        (:scancode-r (incf (ww::rotation target) (/ pi 3)))
+        (:scancode-l (decf (ww::rotation target) (/ pi 3)))
+        (:scancode-equals
+         (when (or (member :lshift modifiers) (member :rshift modifiers))
+           (ww::scale-by target 1.10)))
+        (:scancode-minus
+         (ww::scale-by target 0.9)))
+      (format t "ghoul pos: ~a,~a~%"
+              (ww::x target) (ww::y target))))
+
+(ww::defhandler animate-move-thing
+    (ww::on-keydown ()
+      "If the target is not already involved in an animation, add a
+       perframe handler to the target that animates it to a new position."
+      (when (member scancode '(:scancode-left :scancode-right :scancode-down :scancode-up)) 
+        (unless (gethash target *shared-anim-table*)
+          (setf (gethash target *shared-anim-table*) t)
+          (let* ((tx (ww::x target))
+                 (ty (ww::y target))
+                 (destx tx)
+                 (desty ty)
+                 (dx 0)
+                 (dy 0))
+            (case scancode
+              (:scancode-down (setf dy -1 desty (- ty (ww::height target))))
+              (:scancode-up (setf dy 1 desty (+ ty (ww::height target))))
+              (:scancode-left (setf dx -1 destx (- tx (ww::width target))))
+              (:scancode-right (setf dx 1 destx (+ tx (ww::width target)))))
+            (ww::add-handler
+             target
+             (ww::on-perframe ()
+               (with-accessors ((cx ww::x) (cy ww::y)) target 
+                 (if (and (= cx destx) (= cy desty))
+                     (progn
+                       (remhash target *shared-anim-table*)
+                       (ww::remove-handler target 'ww::perframe))
+                     (setf cx (+ cx dx)
+                           cy (+ cy dy)))))))))))
+
+
+(ww::defhandler thing-clicked
+    (ww::on-mousedown ()
+      (format t "~a was clicked at ~a,~a!~%" target x y)))
+
+(ww::defhandler flip-on-click
+    (ww::on-mousedown ()
+      (incf (ww::rotation target) (ww::radians 180) )))
+
+(ww::defhandler twirl-on-click
+    (ww::on-mousedown ()
+      (unless (gethash target *shared-anim-table*) 
+        (let ((rot 0))
+          (setf (gethash target *shared-anim-table*) t)
+          (ww::add-handler
+           target
+           (ww::on-perframe ()
+             (if (< rot (* 8 pi))
+                 (setf rot (+ 0.3 rot)
+                       (ww::rotation target) rot)
+                 (progn
+                   (setf (ww::rotation target) 0.0)
+                   (ww::remove-handler target 'ww::perframe)
+                   (remhash target *shared-anim-table*)))))))))
+
+(ww::defhandler mouse-over
+    (ww::on-mousemotion ()
+      (print (list target x y xrel yrel state))))
+
+(ww::defhandler look-at-me 
+  (ww::on-focus ()
+    (format t "~a got focus~%" target)))
+
+(ww::defhandler look-away 
+  (ww::on-blur ()
+    (format t "~a lost focus~%" target)))
+
+(ww::defhandler wheelie
+    (ww::on-mousewheel ()
+      (print (list :mousewheel horiz vert dir))))
+
+(defmethod ww::boot ((app image-transforms-etc))
+  (let ((bm
+          (make-instance 'ww::image
+                         :texture (ww::get-asset "Fezghoul.png")))
+        (bm2
+          (make-instance 'ww::image
+                         :texture (ww::get-asset "GelatinousCube.png"))))
+
+    (ww::add-handler app #'wheelie)
+
+    ;; first 
+    (ww::refocus-on bm)
+    (ww::add-handler bm #'animate-move-thing )
+    (ww::add-handler bm #'thing-clicked)
+    (ww::add-handler bm #'mouse-over)
+    
+    ;;second
+    (setf (ww::x bm2) 90
+          (ww::y bm2) 90)
+    (ww::add-handler bm2 #'move-thing)
+    (ww::add-handler bm2 #'twirl-on-click )
+    (ww::add-handler bm2 #'look-at-me)
+    (ww::add-handler bm2 #'look-away)
+    (ww::add-handler bm2 #'wheelie)
+
+    (ww::add-unit app bm)
+    (ww::add-unit app bm2)))
+
+
+(defun start ()
+  (ww::start (make-instance 'image-transforms-etc
+                            :scale 2.0
+                            :fps 60
+                            :width 800
+                            :height 600
+                            :asset-root (merge-pathnames
+                                         "examples/"
+                                         (asdf:system-source-directory :wheelwork)))))
+
+
+