Main loop with recursivity

[gacela.git] / src / views.scm

diff --git a/src/views.scm b/src/views.scm
index ca1adc5b7cdbb4cbf62c5c4c999ff5e4db6ae70d..75f90713bd0150a1344bc2f7533c295c00437212 100644 (file)
--- a/src/views.scm
+++ b/src/views.scm
@@ -26,31 +26,70 @@
 
 (define view-type
   (make-record-type "view" 
-                   '(id controllers meshes)
+                   '(id constructor body meshes priority)
                    (lambda (record port)
-                     (format port "#<view: ~a controllers / ~a meshes>"
-                             (length (hash-map->list (lambda x x) (view-controllers record)))
-                             (length (hash-map->list (lambda x x) (view-meshes record)))))))
+                     (format port "#<view: ~a meshes>"
+                             (length (view-meshes record))))))
 
+(define (build-view constructor) ((record-constructor view-type) (gensym) constructor #f '() 0))
 (define view? (record-predicate view-type))
 (define view-id (record-accessor view-type 'id))
-(define view-controllers (record-accessor view-type 'controllers))
+(define view-constructor (record-accessor view-type 'constructor))
+(define view-body (record-accessor view-type 'body))
+(define view-body-set! (record-modifier view-type 'body))
 (define view-meshes (record-accessor view-type 'meshes))
-(define (make-view) ((record-constructor view-type) (gensym) (make-hash-table) (make-hash-table)))
+(define view-meshes-set! (record-modifier view-type 'meshes))
+(define view-priority (record-accessor view-type 'priority))
 
+(define-macro (make-view body)
+  `(build-view (lambda () ,body)))
 
-(define active-views (make-hash-table))
+(define activated-views '())
 
-(define default-view (make-hash-table))
+(define (sort-views views-alist)
+  (sort views-alist
+       (lambda (v1 v2)
+         (< (view-priority (cdr v1)) (view-priority (cdr v2))))))
 
-(define* (draw-meshes #:optional (meshes (hash-map->list (lambda (k v) v) default-view)))
+(define (reset-view! view)
+  (view-body-set! view ((view-constructor view)))
+  (view-meshes-set! view '())
+  (view-priority-set! view 0))
+
+(define (activate-view view)
+  (reset-view! view)
+  (set! activated-views
+       (sort-views (assoc-set! activated-views (view-id view) view)))
+  view)
+
+(define (view-actived? view)
+  (and (assoc (view-id view) activated-views) #t))
+
+(define (view-priority-set! view priority)
+  ((record-modifier view-type 'priority) view priority)
+  (if (view-actived? view)
+      (set! activated-views (sort-views activated-views))))
+
+(define current-view #f)
+
+(define* (run-views #:optional (views activated-views))
+  (cond ((not (null? views))
+        (set! current-view (cdar views))
+        ((view-body current-view))
+        (draw-meshes (view-meshes current-view))
+        (run-views (cdr views)))))
+
+(define (draw-meshes meshes)
   (cond ((not (null? meshes))
         (catch #t
-                 (lambda () (mesh-draw (car meshes)))
+                 (lambda () (mesh-draw (cdar meshes)))
                  (lambda (key . args) #f))
         (draw-meshes (cdr meshes)))))
 
 
+(define default-view (activate-view (make-view (lambda () #f))))
+
+
 ;;; Meshes
 
 (define mesh-type
@@ -67,13 +106,13 @@
 
 (define mesh? (record-predicate mesh-type))
 
-(define* (make-mesh proc #:optional mesh-type)
+(define* (make-mesh proc #:optional type)
   (apply
    (record-constructor mesh-type)
    (let ((px 0) (py 0) (pz 0)
         (ax 0) (ay 0) (az 0)
         (rx 0) (ry 0) (rz 0)
-        (id (gensym)) (type mesh-type)
+        (id (gensym))
         (properties '()))
      (let ((inner-properties
            (lambda ()
@@ -141,13 +180,19 @@
 (define (mesh-property-set! mesh prop-name value)
   (((record-accessor mesh-type 'property-set!) mesh) prop-name value))
 
-(define* (show mesh #:optional (view default-view))
-  (let ((id (mesh-inner-property mesh 'id)))
-    (if (not (hash-ref view id))
-       (hash-set! view id mesh))))
+(define* (show mesh #:optional (view current-view))
+  (let ((id (mesh-inner-property mesh 'id))
+       (table (view-meshes view)))
+    (if (not (assoc-ref table id))
+       (view-meshes-set! view (assoc-set! table id mesh))))
+  mesh)
 
-(define* (hide mesh #:optional (view default-view))
-  (hash-remove! view (mesh-inner-property mesh 'id)))
+(define* (hide mesh #:optional (view current-view))
+  (let ((id (mesh-inner-property mesh 'id))
+       (table (view-meshes view)))
+    (if (assoc-ref table id)
+       (view-meshes-set! view (assoc-remove! table id))))
+  mesh)
 
 (define* (translate mesh x y #:optional (z 0))
   (((record-accessor mesh-type 'translate) mesh) x y z)
@@ -191,11 +236,11 @@
   (square video:draw-square))
 
 
+;;; Adding extensions to the main loop
+(add-extension! run-views 10)
+
+
 (module-map (lambda (sym var)
              (if (not (eq? sym '%module-public-interface))
                  (module-export! (current-module) (list sym))))
            (current-module))
-
-
-;;; Adding extensions to the main loop
-(add-extension! draw-meshes 50)