Allow adding parts to cut via the UI

deps.edn

@@ -9,5 +9,6 @@
  {:cljs {:extra-deps {thheller/shadow-cljs {:mvn/version "2.8.109"}
                       appliedscience/js-interop {:mvn/version "0.2.5"}
                       reagent/reagent {:mvn/version "1.1.0"}
+                      fipp/fipp {:mvn/version "0.6.25"}
                       #_#_ refactor-nrepl/refactor-nrepl {:mvn/version "3.1.0"}
                       #_#_ cider/cider-nrepl {:mvn/version "0.27.2"}}}}}

resources/public/style.css

@@ -33,3 +33,16 @@ rect {
   stroke-width: 1;
   stroke: coral
 }
+
+text {
+  fill: coral;
+  font: 12px sans-serif;
+}
+
+.num-rects {
+  width: 4em;
+}
+
+.rect-dim {
+  width: 6em;
+}

src/heyarne/rect_packing/core.cljs

@@ -3,22 +3,23 @@
             [reagent.dom :as dom]
             [thi.ng.geom.core :as geom]
             [thi.ng.geom.rect :as rect]
-            [thi.ng.geom.vector :as v]))
+            [thi.ng.geom.vector :as v]
+            [fipp.edn :refer [pprint]]))
 
 (defonce state (r/atom {:rects []
                         :frame (rect/rect 500 500)}))
 
 (comment
 
-  (swap! state update :rects empty)
+  (swap! state assoc :rects [])
   (swap! state update :rects conj (rect/rect 200 200))
 
   ;; fill with random rectangles
-  (swap! state assoc :rects
-         (repeatedly 20 #(rect/rect (+ 50 (rand-int 50)) (+ 50 (rand-int 50)))))
+  (swap! state assoc :rects (repeatedly 100 #(rect/rect 50 50)))
 
   )
 
+
 (defn pack-rects-naive
   "Sorts all rectangles by height and places them next to each other into frame,
   starting at the top left."
@@ -48,27 +49,83 @@
 
 #_(pack-rects-naive (:frame @state) (:rects @state))
 
+#_(->> (pack-rects-naive (:frame @state) (:rects @state))
+     (group-by :size)
+     (into (sorted-map-by geom/height)))
+
+(defn by-size [rects]
+  (->> (group-by (comp reverse :size) rects)
+       (into (sorted-map-by (comp (partial * -1) compare)))))
+
+(defn add-parts-to-cut! [order]
+  (let [rects (repeatedly (:num order) #(rect/rect (:width order) (:height order)))]
+    (swap! state update :rects (comp vec concat) rects)))
+
+(defn order []
+  (let [base-order {:num 1
+                    :width 100
+                    :height 100}
+        addition (r/atom base-order)]
+    (fn []
+      (let [to-add @addition]
+        [:p "Add part to cut: "]
+        [:form {:on-submit (fn [e]
+                             (.preventDefault e)
+                             (add-parts-to-cut! @addition)
+                             (reset! addition base-order))}
+         [:input.num-rects {:type "number"
+                            :on-change #(swap! addition assoc :num (js/parseInt (.. % -target -value) 10))
+                            :value (:num to-add)}] " × "
+         [:input.rect-dim {:type "number"
+                           :on-change #(swap! addition assoc :width (js/parseInt (.. % -target -value) 10))
+                           :value (:width to-add)}] " cm by "
+         [:input.rect-dim {:type "number"
+                           :on-change #(swap! addition assoc :height (js/parseInt (.. % -target -value) 10))
+                           :value (:height to-add)}] " cm "
+         [:button "Add"]]))))
+
+(defn debug [val]
+  [:pre (with-out-str (pprint val))])
+
+(defn inventory [rects]
+  (prn "re-rendering inventory with rects" rects)
+  [:<>
+   [order]
+   (when (seq rects)
+     [:<>
+      [:p "List of parts to cut:"]
+      [debug (by-size rects)]
+      #_[:ul
+       (for [[size rects] (by-size rects)
+             :let [k (pr-str size)]]
+         ^{:key k}
+         [:li [:input.num-rects {:type "number"
+                                 #_#_ :on-change #(update-rects! rects size (js/Number. (-> % .-target .-value)))
+                                 #_#_ :value (str (count rects))}] (str " x " (:x size) "x" (:y size))])]])])
+
+(defn visualization [frame packed-rects]
+  [:svg.visualization {:viewBox "-0.5 -0.5 501 501" :xmlns "http://www.w3.org/2000/svg"}
+   [:rect {:width (geom/width frame)
+           :height (geom/height frame)}]
+   (for [[idx rect] (map-indexed vector packed-rects)
+         :let [[x y] (:p rect)
+               w (geom/width rect)
+               h (geom/height rect)]]
+     ^{:key idx} [:<>
+                  [:rect {:width w :height h :x x :y y}]
+                  [:text {:x x :y y :dx 4 :dy 14} (str w "x" h)]])])
+
 (defn main []
   (let [{:keys [frame rects]} @state
-        sorted (map-indexed vector (pack-rects-naive frame rects))]
+        packed (pack-rects-naive frame rects)]
     [:main
      [:h1 "Visualization"]
-     [:svg.visualization {:viewBox "-0.5 -0.5 501 501" :xmlns "http://www.w3.org/2000/svg"}
-      [:rect {:width (geom/width frame)
-              :height (geom/height frame)}]
-      (for [[idx rect] sorted]
-        ^{:key idx} [:rect {:width (geom/width rect) :height (geom/height rect)
-                            :x (-> rect :p :x)
-                            :y (-> rect :p :y)}])]
+     [visualization frame packed]
      [:h2 "Rectangles"]
-     [:ul
-      (for [[idx rect] sorted]
-        ^{:key idx} [:li [:pre (pr-str rect)]])]]))
+     [inventory rects]]))
 
 (defn ^:dev/after-load init []
   (println "Initializing…")
   (dom/render [main] (.querySelector js/document "#app")))
 
 (defonce app (init))
-
-(+ 1 2)